Fully automated material handling has moved from aspiration to operational requirement in heavy fabrication. Labor costs climb, skilled operators retire, and production schedules demand throughput that manual handling cannot sustain. The Herochu heavy-duty fully automatic servo swing arm robot answers this pressure with a system engineered for unmanned plate handling at capacities up to 1000 kg.

Unmanned Operation

The Herochu robot operates in fully automatic mode through a PC-controlled loading sequence managed by an Omron numerical control system. Once a production run is configured on the touch screen HMI — which communicates with the PLC via network cable — the robot cycles through sheet pickup, swing positioning, placement, and return without operator intervention at each cycle. An operator sets the parameters and monitors the system rather than handling each sheet.

This shift from per-sheet manual handling to parameter-based batch operation is what makes the system functionally unmanned for loading cycles. The robot repeats the loading sequence with ±2 mm repeatability, meaning every sheet lands in the same position on the cutting bed or processing station. Downstream equipment — laser cutters, plasma tables, press brakes — receives consistent input without the positional variance that manual loading introduces.

Heavy-Duty Capacity

The Herochu robot handles plate weights of 300 kg, 500 kg, and 1000 kg depending on configuration. Sheet dimensions extend to 3000 × 1500 mm (HC-R3015-300 model) or 4000 × 1500 mm (HC-R4015-500 model), with material thickness from 1 to 20 mm. Applicable materials include carbon steel, stainless steel, and aluminum.

The lifting mechanism is a large-torque servo synchronous drive delivering a 700 mm stroke at 1–5.5 m/min. The swing arm rotates ±60 degrees through a servo positioning transmission. These specifications — combined with the heavy-load oil-resistant suction cup array — enable the robot to handle thick carbon steel plates that exceed what a single operator can safely manage manually.

Suction Cup Array and Sheet Separation

The end-of-arm tooling consists of multiple sets of heavy-load oil-resistant suction cups, each equipped with an individual opening and closing valve. The system integrates a sheet separation function that prevents double-sheet pickup from stacked storage. When the cups descend onto a stack, the separation mechanism and selective valve control ensure that only the top sheet is engaged — a critical capability for automated runs where an operator is not present to visually verify single-sheet pickup.

Oil-resistant cup material maintains grip on oiled and coated plates without degradation, extending cup service life in shops that receive oiled stock from suppliers.

Safety Architecture for Unmanned Operation

Unmanned operation demands safety systems that function without human oversight. The Herochu robot incorporates several layers:

Five-minute power-off retention. If power or air supply fails during an unmanned cycle, suction cups hold the plate for five minutes. In lights-out operations where no operator is present to respond immediately, this retention window prevents a plate from dropping onto equipment or the floor.

Emergency air-cut protection and automatic braking. Emergency stops immediately halt pneumatic supply and lock the swing arm through the braking system. The arm does not drift or coast.

Color-coded pneumatic system. Blue pipes carry inbound air; red (orange) pipes carry outbound air. Every connector is labeled. This standardization reduces maintenance errors — a critical factor when the system operates unattended and maintenance is performed on a scheduled rather than continuous basis.

Safety warning labels, maintenance labels, and operation instructions are affixed at key steps on the equipment. The system supports both manual and automatic operating states, with bilingual (Chinese and English) button function identifiers.

Cost and Production Impact

The economic case for the Herochu robot rests on three factors. First, increased production capacity: automated loading keeps cutting and processing equipment at higher duty cycles than manual loading permits. Second, labor cost savings: one operator manages the system rather than multiple workers handling sheets. Third, reduced damage and rework: consistent ±2 mm placement and surface-friendly vacuum suction eliminate the sheet damage and misalignment costs that manual chain-and-clamp handling generates over time.

Herochu supports deployment with on-site technical engineers who guide installation and debugging through completion. The robot is customizable beyond the standard specifications — sheet thickness range, loading width, and plate weight capacity can be configured to match specific production requirements.

For heavy fabrication operations pursuing full automation, the Herochu servo swing arm robot provides the load capacity, control precision, and safety architecture needed to run loading cycles without continuous operator presence.

The term “crane” in sheet metal fabrication traditionally conjures images of overhead bridge cranes with chains, hooks, and slings. The Herochu servo swing steel plate suction crane redefines that concept — replacing hooks and slings with a column-mounted swing arm terminating in a vacuum suction cup array that grips steel plates flatly and evenly across their surface area.

Suction Crane vs. Conventional Lifting

Conventional plate lifting uses chains, magnets, or clamps. Chains concentrate load at lift points and can deform thin sheets. Magnets work on ferrous materials but fail on stainless steel and aluminum. Clamps require edge access and manual engagement for every sheet. The Herochu suction crane sidesteps all three limitations. Vacuum suction cups distribute the lifting force across the sheet surface, work on carbon steel, stainless steel, and aluminum alike, and engage automatically through the valve-controlled pneumatic system.

The result is a lifting method that handles mixed-material fabrication shops without tooling changes and protects sheet surfaces from the marks and dents that chain and clamp lifting leaves behind.

Vacuum System Architecture

The Herochu suction crane uses multiple sets of heavy-load oil-resistant suction cups. Each cup is individually valve-controlled — meaning the system can open or close cups based on sheet dimensions. A small sheet activates fewer cups; a full-size sheet activates the complete array. This selective engagement prevents the edge vacuum loss that occurs when inactive cups on an oversized array bleed vacuum pressure away from the cups actually in contact with the sheet.

The SNS pneumatic system supplies regulated vacuum to the cup array. Pneumatic routing uses color-coded pipes — blue for inbound air, red (orange) for outbound — with every connector labeled for identification and maintenance. This color-and-label system reduces the risk of maintenance errors that could compromise vacuum performance or create unsafe lifting conditions.

Servo Drive and Positioning

The crane’s swing arm is positioned by a servo swinging-arm positioning transmission, and vertical lift is driven by a large-torque servo synchronous lifting mechanism. The combination delivers controlled, repeatable motion that chain-hoist cranes cannot achieve. Lifting speed ranges from 1 to 5.5 m/min across a 700 mm stroke. Swing rotation covers ±60 degrees — enough to move sheets between storage, inspection, and laser cutting bed positions without the sweeping arc of a full-rotation jib crane.

Repeatability of ±2 mm means the crane places sheets in the same position cycle after cycle. For laser cutting machine loading, this consistency allows the laser operator to trust that the sheet origin matches the programmed nesting origin without re-referencing after each load.

Safety Systems

The Herochu suction crane is built around the principle that a suspended steel plate must never fall. Three independent safety layers enforce this:

Power-off retention. If electrical power or compressed air is interrupted, the suction cups hold the plate for five minutes. This window allows operators to clear the area, diagnose the interruption, and either restore service or execute a controlled manual lowering procedure.

Emergency air-cut protection. An emergency stop immediately cuts the pneumatic supply and triggers the automatic braking system, halting all swing arm motion. The arm locks in position rather than coasting to an uncontrolled stop.

Automatic braking. The braking system engages during normal stop sequences and emergency stops alike, preventing arm drift under load.

Safety warning labels, maintenance labels, and operation instructions are affixed at key locations on the equipment. The system operates in both manual and automatic modes, with bilingual (Chinese and English) button function identifiers.

Technical Specifications

Applications Beyond Laser Cutting

While the primary application is laser cutting machine loading, the Herochu suction crane’s material versatility and controlled placement make it suitable for loading plasma cutting tables, press brake feeding stations, and sheet inspection areas. Any process that requires flat, undamaged sheet placement at a repeatable position benefits from the suction crane’s combination of vacuum grip and servo-driven positioning.

Herochu provides full installation and debugging support with experienced technical engineers on-site through commissioning, ensuring the crane reaches its specified performance before handoff.

Fiber laser cutting machines have transformed sheet metal fabrication with cutting speeds and edge quality that legacy plasma and mechanical systems cannot match. But the productivity gains of a high-wattage fiber laser mean nothing if the machine sits idle while operators manually schlep steel plates onto the cutting bed. The Herochu servo swing arm handling manipulator closes this gap — automating the loading sequence so the laser cutter runs at its designed duty cycle.

The Loading Problem

A typical fiber laser cutting machine processes a standard sheet in minutes. Manual loading of a 300 kg steel plate onto the cutting bed, by contrast, can take several minutes of crane positioning, chain rigging, manual alignment, and unhooking. The laser waits. The operator tires. Sheet positioning varies from load to load, which forces the laser operator to re-reference the origin or accept cut tolerance drift.

The Herochu loading system eliminates this mismatch. By combining a servo-driven swing arm with an integrated vacuum suction array, the system picks a sheet from the storage rack, rotates it into position, and places it on the laser cutting bed in one continuous motion — controlled by a PC-driven automatic loading sequence.

Integrated Sheet Separation

One persistent challenge in automated laser loading is sheet separation. Stacked steel plates, especially oiled or freshly cut sheets, tend to stick together. If the suction system lifts two sheets instead of one, the laser cutting program nests incorrectly and the lower sheet may be damaged or jam the machine.

The Herochu system integrates a sheet separation function directly into the loading cycle. Before the suction cups engage full vacuum, the separation mechanism — combined with the selective opening-and-closing valve system on each suction cup — ensures only the top sheet is lifted. The oil-resistant suction cups maintain grip on coated and oiled plates without slippage, and the individual valve control means cup engagement patterns adapt to different sheet sizes without manual reconfiguration.

Servo Swing Arm Mechanics

The swing arm rotates ±60 degrees, which is sufficient to bridge the path between an adjacent sheet storage rack and the laser cutting bed without requiring a full 180-degree rotation. This constrained rotation range keeps cycle time fast and reduces the mechanical stress on the positioning transmission compared to continuous-rotation designs.

Lifting is driven by the large-torque servo synchronous lifting mechanism, delivering smooth vertical travel at 1–5.5 m/min across a 700 mm stroke. The servo drive eliminates the jerky motion and positioning drift common in pneumatic-only lift systems, which is critical when placing sheets onto a laser bed that may have pin-type or mat-type support grids requiring precise placement to avoid support damage.

Material and Size Range

The Herochu loader handles the full range of materials typical in fiber laser fabrication: carbon steel, stainless steel, and aluminum. Sheet thickness spans 1–20 mm, covering the vast majority of fiber laser cutting applications. Sheet dimensions up to 3000 × 1500 mm or 4000 × 1500 mm match the standard bed sizes of mid-range and large-format fiber laser cutting machines. The system supports plate weights from 300 kg up to 1000 kg, meaning even thick plate loads within the laser’s cutting capacity can be automated.

Control System and Operation

An Omron numerical control system governs the loading sequence. The touch screen HMI communicates with the PLC via network cable, giving the operator a single interface for initiating automatic loading cycles, monitoring suction status, and switching between manual and automatic modes. Button function identifiers are bilingual — Chinese and English — which simplifies operator training in mixed-language shop environments.

Safety During Laser Integration

Safety engineering takes on added importance when the loading system operates in proximity to a running laser cutter. The Herochu system includes power-off protection that maintains suction cup grip for five minutes after power or air loss, preventing a suspended sheet from dropping onto the laser bed or into the machine enclosure. Emergency air-cut protection and automatic braking bring the swing arm to an immediate controlled stop. Color-coded pneumatic pipes (blue in, red out) with labeled connectors simplify maintenance and reduce the risk of reconnecting lines incorrectly after service.

Productivity Impact

By automating the loading cycle, the Herochu servo swing arm system increases laser cutter utilization. The machine no longer waits for manual loading. One operator can manage the loading system and the laser cutter from the HMI rather than dedicating two workers to the loading task. For shops running lights-out or extended shifts, the automated loading sequence enables continuous laser cutter operation with reduced labor overhead.

Steel plate handling has long been a bottleneck in fabrication shops. Workers wrestle with heavy sheets, cycle times drag, and manual loading introduces variability that ripples through downstream cutting and forming operations. The Herochu servo swing arm manipulator restructures this workflow from the ground up — replacing muscle and guesswork with computer-controlled precision that fabricators can rely on shift after shift.

Modular Architecture Built for Fast Deployment

The Herochu manipulator ships as a modular assembly structure. Each subsystem — the swinging-arm main body, the large-torque servo synchronous lifting mechanism, the servo swinging-arm positioning transmission, and the pneumatic suction array — bolts together on-site without specialized rigging equipment. This modular philosophy cuts installation time and means the unit can be disassembled and relocated when a shop reconfigures its floor layout. Space waste drops because the swing-arm design occupies a compact footprint relative to fixed gantry or rail-based alternatives.

Servo-Driven Lifting and Positioning

At the core of the Herochu system is a large-torque servo synchronous lifting mechanism paired with servo swinging-arm positioning transmission. Unlike pneumatic-only lifts that drift under load or hydraulic systems that leak and lag, the servo drive delivers repeatable vertical and rotational control. The lifting stroke reaches 700 mm with a lifting speed adjustable from 1 to 5.5 m/min. Rotation spans ±60 degrees at an angular speed of 2–5 mm, giving the operator fine control over sheet placement orientation.

Repeatability sits at ±2 mm — a figure that matters when downstream laser cutters demand consistent sheet positioning for nested cutting programs. The Omron numerical control system, imported and integrated into the electrical architecture, drives these servo motions through network cable communication between the touch screen HMI and the PLC.

Handling Versatility Across Materials

The manipulator handles carbon steel, stainless steel, and aluminum sheets ranging from 1 to 20 mm in thickness. Sheet dimensions scale from a minimum loading width of 1250 × 1250 mm up to 3000 × 1500 mm on the HC-R3015-300 model and 4000 × 1500 mm on the HC-R4015-500 model. Maximum plate weight capacities are tiered at 300 kg, 500 kg, and 1000 kg, covering everything from light-gauge aluminum to thick carbon steel plates used in structural fabrication.

Multiple sets of heavy-load oil-resistant suction cups form the end-of-arm tooling. Each suction cup carries its own opening and closing valve, which means the system can selectively engage or release cups depending on sheet size and weight distribution. This selective activation prevents sheet sagging and edge drop-off that occurs when all cups fire indiscriminately on a smaller plate.

Safety Engineering

Industrial sheet handling carries genuine risk. The Herochu manipulator addresses this with layered protection. An emergency air-cut protection system halts operation immediately on demand, and an automatic braking system locks the swing arm in position during stops. The most critical safety feature is the power-off retention: if power or air supply is interrupted mid-cycle, the suction cups hold the sheet for a full five minutes without dropping — giving operators time to clear the area and restore service.

Color-coded pneumatic routing reinforces safe maintenance practices. Red (orange) pipes carry outbound air, blue pipes carry inbound air, and every connector is labeled for identification. Safety warning labels, maintenance labels, and operation instructions are affixed at key points on the equipment. The button function identifiers are printed in both Chinese and English, and the device supports both manual and automatic operating states.

Specification Summary

Installation and Commissioning

Herochu dispatches experienced technical engineers to guide the full installation and debugging process. Rather than shipping a manual and leaving the customer to figure out integration, the engineering team stays on-site through commissioning — verifying servo calibration, suction cup engagement sequences, PLC-to-HMI communication, and safety system responses under real load conditions. This hands-on approach ensures the manipulator reaches its specified ±2 mm repeatability from day one rather than after weeks of trial-and-error tuning by the end user.

For fabrication shops looking to automate sheet loading without committing to a full gantry system, the Herochu servo swing arm manipulator delivers servo-driven precision, modular flexibility, and documented safety engineering in a footprint that fits existing floor plans.

The Herochu gantry loading and unloading system is a fully automatic metal sheet handling solution for industrial laser cutting equipment, integrating vacuum suction loading, mechanical gripper unloading, sheet separation detection, and intelligent control. The system is designed to eliminate manual material handling from the laser cutting process, achieving continuous automated operation from raw sheet loading to finished part unloading.

Herochu focuses on the research, development, and manufacture of industrial automation and gantry manipulator systems. Its product line covers heavy-duty truss systems, intelligent loading/unloading manipulators, and supporting storage and logistics equipment. The brand holds CE, UE, and ISO 9001 certifications and exports to industrial markets worldwide.

System Composition and Workflow

Core Components

The Herochu gantry handling system comprises the following key modules: a composite truss manipulator matched to the laser cutter, a double-layer electric exchange cart, a CNC control system, a vacuum control system, and an optional three-dimensional storage warehouse. Together with the laser cutter, the system forms an automated sheet production cell that executes the complete flow from raw material storage, automatic separation, automatic loading, cutting, to automatic unloading.

Automated Work Sequence

The working cycle begins with extracting a raw sheet from the storage rack or loading station. The vacuum cup matrix picks a single sheet from the top of the stack under computer control, while the integrated separation device operates synchronously to eliminate sheet sticking. The sheet is precisely placed on the laser cutter’s exchange table or loaded directly onto the cutting bed. After the cutting program completes, mechanical forks and gripping devices work together to move finished parts and the skeleton out of the cutting area, transferring them to the lower exchange cart or finished collection area. The system then automatically enters the next cycle for continuous, uninterrupted operation.

Double-Layer Exchange Cart Mechanism

The double-layer electric exchange cart is a key component ensuring continuous production. The upper layer pre-loads sheets to be cut, while the lower layer receives completed parts and skeletons. While the laser processes the current sheet, the manipulator can pre-position the next sheet on the exchange cart, fully parallelizing loading/unloading with the cutting process. This parallel architecture minimizes laser cutter waiting time.

Technical Parameters

The Herochu gantry handling system offers five standard models with the following specifications:

Intelligent Control and Safety System

Control System Architecture

The Herochu system uses Siemens PLC as the core controller, paired with an Omron sensor network for comprehensive status monitoring. The touchscreen HMI provides an intuitive operating interface supporting parameter configuration, job recall, and real-time status display. The system supports mainstream industrial communication protocols including PROFINET, EtherNet/IP, and Modbus, enabling data exchange with various CNC systems and factory-level MES.

Safety Protection Mechanisms

The safety design covers power failure, air pressure anomalies, and collision protection. Spring-applied mechanical brakes automatically lock when power is lost or air pressure is insufficient, preventing accidental load drops. The work area is equipped with safety light curtains and physical guards that trigger automatic shutdown when personnel enter the danger zone. LED safety beacons and emergency stop buttons provide additional operational safety.

Operational Benefits and Investment Value

Fabricators deploying the Herochu gantry handling system gain improvements across multiple operational dimensions. Laser cutter utilization rises from about 60% in manual mode to over 85%, with significant single-shift capacity gains. Material handling cycle times shrink by 40% to 50%, freeing operators from repetitive physical labor for higher-value tasks such as equipment monitoring and quality inspection.

The system’s high-reliability design keeps scheduled uptime above 98% with low maintenance requirements. Combined with labor cost savings and capacity gains, capital payback is typically within 4 to 6 months. For metal fabricators facing rising labor costs and intensifying market competition, the Herochu gantry handling system provides a quantifiable, predictable automation upgrade path.

In modern industrial production, the processing capability of laser cutting equipment continues to rise, yet lagging material handling often prevents equipment potential from being fully realized. The Herochu Gantry Loading for Industrial Laser Machines series focuses on delivering high-strength, high-precision automated loading and unloading for industrial-grade laser cutting equipment. Built around a heavy-duty truss manipulator and integrating vacuum suction with mechanical gripping, the line handles carbon steel, stainless steel, aluminum alloy, copper, and other metal sheets.

In structural design, the Herochu gantry system adopts a dual-girder composite truss architecture that evenly distributes heavy bending loads across paired guidance rails. This design maintains structural rigidity and motion stability even under long-stroke operation, with longitudinal travel customizable up to 50 meters to suit large workshop layouts.

Core Technology Innovation

Adaptive Vacuum Cup Technology

The end effector of the Herochu gantry loading system uses a zone-controlled vacuum suction matrix. For raw full sheets, all vacuum zones engage to provide maximum holding force. When handling a nested sheet with finished parts, the system uses Siemens PLC control to activate only the vacuum zones in contact with solid sheet structure, keeping non-contact zones sealed to avoid pressure leakage. This adaptive capability allows the system to safely transport cut components with large cutouts, a scenario where conventional vacuum cups often fail to maintain sufficient holding force.

The cups are made of heavy-duty oil-resistant polyurethane with excellent wear resistance and aging resistance. Tool-less quick-change design means maintenance operations require no specialized technicians, significantly reducing equipment downtime.

Dual Sheet Separation System

When raw sheets are stacked, residual oil film or vacuum effects between plates often cause sticking. The Herochu separation mechanism uses a mechanical and pneumatic collaborative approach: the Z-axis first applies a micro-bending force to the sheet edge to break surface tension; compressed air then injects high-speed airflow through precision nozzles into the sheet gap to further separate stuck plates. Before the sheet enters the transfer stage, load sensors and thickness detection re-verify the actual weight to ensure single-sheet delivery.

High-Speed Servo Drive Architecture

Motion performance is guaranteed by high-torque servo motors and precision reduction mechanisms. Rack-and-pinion drive paired with planetary gearboxes achieves zero-backlash transmission, and oversized linear guides ensure smooth acceleration even under maximum load. Gantry traverse speed reaches 10 to 30 m/min, lifting speed 5 to 10 m/min, and fork adjustment speed 5 to 20 m/min. This speed configuration allows the manipulator’s loading/unloading cycle to fit entirely within the laser cutting cycle window.

Technical Specifications

The Herochu gantry loading system for industrial laser machines offers five standard models covering sheet sizes from 2500×1300mm to 6000×1500mm. The HC-RT2513-300 model has a maximum load of 300 kg, suitable for thin and medium-thickness sheet processing; the four 500-series models carry 500 kg and can handle carbon steel sheets up to 20mm thick.

The air supply requirement is 0.6-0.7 MPa with air consumption of approximately 1.5 m³/min. Repeatability of ±2mm meets the sheet placement precision required by laser cutting. All models support 3-axis single-arm or double-arm configurations, adjustable to workshop layout.

Safety Protection System

The Herochu gantry system integrates multi-level safety protection. Power and air failure protection is achieved through spring-applied mechanical brakes that instantly lock the arm position when air pressure falls below 0.4 MPa or power is interrupted. Workplace protection includes soft-cushion bumpers, 360° LED safety beacons, and emergency stop controls. A balanced counterweight system ensures arm stability during manual inspection or maintenance.

Automation modes support both semi-automatic teaching and fully automatic Ethernet integration. In automatic mode, the system communicates directly with CAD/CAM nesting software, synchronizing commands with the CNC and laser table.

Integration and Expansion Capability

The Herochu gantry loading system is designed as a modular architecture that can interface with multi-tier sheet storage towers and automated warehouse systems. A shared single-aisle overhead structure can reclaim up to 50% of workshop floor space. The system supports dual independent Z-axis configurations for concurrent pick-and-place, suitable for production scenarios requiring high-tempo material flow.

For fabricators that already operate laser cutting equipment but have not yet automated material handling, the Herochu gantry loading system offers a low-intrusion upgrade path. Compatibility with mainstream laser cutting brands protects existing equipment investment while raising utilization to a new level.

Metal sheet fabrication is undergoing a deep transformation from labor-intensive operations toward automated, intelligent production. With the maturity and widespread adoption of fiber laser cutting, cutting speed itself is no longer the primary constraint on throughput. The real bottleneck has shifted to material handling between cutting cycles—manual loading, part extraction, and scrap removal directly erode the productive hours of expensive laser equipment.

Herochu, a professional manufacturer in industrial automation, has engineered its Automated Plate Loading & Unloading Systems for Metal Laser Cutting Machines to address this industry pain point systematically. The brand operates a modern standard factory of over 10,000 square meters and holds CE, UE, and ISO 9001 certifications.

System Architecture and Core Components

Composite Truss Manipulator Structure

The core of the Herochu automated handling system is a heavy-duty gantry manipulator that travels along an elevated track between the storage tower and the loading station. The system comprises a three-dimensional storage warehouse, double-sided gantry truss, loading/unloading composite truss manipulator, double-layer finished-material cart, and a PLC control network. This modular architecture allows independent optimization of each subsystem while ensuring coordinated operation as a whole.

Intelligent Vacuum Suction Matrix

The system carries a high-density vacuum suction array fitted with heavy-duty oil-resistant polyurethane cups. Each cup integrates an independent shut-off valve that automatically closes the air circuit when it does not contact the sheet surface, preventing pressure loss. Tool-less replacement allows operators to quickly adapt to stainless steel, aluminum alloy, carbon steel, and other sheet types. Vacuum pressure sensors monitor the suction process in real time, triggering a safety interlock immediately if pressure drops abnormally.

Unloading Gripper Mechanism

Unlike the vacuum suction on the loading side, the unloading stage uses a combination of mechanical forks and gripping devices. The forks bear the weight of finished sheets and skeletons during unloading, transferring them from the cutting table to the lower exchange cart or finished-material cart. This division of labor avoids the limitations of vacuum suction when handling irregular cut parts and reduces cup wear.

Technical Parameters and Model Configuration

Herochu offers five standardized model configurations covering sheet dimensions from 2500×1300mm to 6000×1500mm. The HC-RT2513-300 model suits thin-sheet applications up to 300 kg; the HC-RT3015-500, HC-RT4015-500, HC-RT4020-500, and HC-RT6015-500 models all carry 500 kg capacity and match the table specifications of mainstream laser cutters.

All models share unified motion performance: robot arm traverse speed of 10-30 m/min, lifting speed of 5-10 m/min, fork adjustment speed of 5-20 m/min, and repeatability of ±2mm. The air supply requirement is 0.6-0.7 MPa with an air consumption of approximately 1.5 m³/min.

Control System and Factory Integration

The system is built with standardized industrial control components, including Siemens PLC and Omron sensors, ensuring reliability and ease of maintenance. A touchscreen human-machine interface allows operators to monitor the loading/unloading cycle, adjust parameters, and recall stored job recipes. The system supports standard fieldbus protocols such as PROFINET, EtherNet/IP, and Modbus, enabling immediate communication with mainstream CNC brands.

At a higher level of factory integration, the Herochu handling system can interface with automated storage and retrieval systems and manufacturing execution systems. The gantry manipulator’s PLC exchanges signals with the laser cutter’s CNC for program start/complete, table ready, and safety interlock, while coordinating raw material replenishment with the warehouse management system. This integration capability elevates the handling system from a mere material transport device to an information hub within the intelligent machining cell.

Safety Mechanisms and Operational Reliability

Safety runs through the design logic of every Herochu system. Spring-applied mechanical brakes lock the arm instantly during sudden power loss or when air pressure drops below 0.4 MPa, preventing load drops. Workplace protection includes soft-cushion bumpers, 360° LED safety beacons, emergency stop controls, and balanced counterweights. Automation modes support both semi-automatic teaching and fully automatic Ethernet integration, allowing operators to switch flexibly according to production needs.

Economic Benefit Analysis

The direct economic benefits of deploying a Herochu automated handling system appear across multiple dimensions. Machine utilization rises from around 60% in manual mode to over 90%, and loading/unloading cycle times shrink by 40% to 50%. A single operator can complete material handling tasks that previously required multiple workers, significantly reducing labor costs. Operational reliability stays above 98% scheduled uptime, and combined with low-maintenance design, capital payback is typically held within 4 to 6 months. For metal fabricators pursuing lean production and cost optimization, this return profile offers clear appeal.

In modern metal fabrication, fiber laser cutting machines have reached remarkable cutting speeds. A 12kW or 20kW laser source can profile complex geometries in a matter of minutes. Yet the real bottleneck in many workshops is not the laser itself—it is the material handling that surrounds each cutting cycle: raw sheet loading, finished part removal, and skeleton extraction. The Herochu Gantry Loading and Unloading System for Laser Cutting is engineered specifically to close this efficiency gap.

Herochu specializes in heavy-duty, customized gantry truss systems and intelligent loading/unloading manipulators designed to optimize material handling across CNC machining, metal fabrication, laser cutting, and smart warehouse logistics. The brand is known for structural rigidity, control precision, and consistent operating stability.

Core Technology and Working Principle

Integrated Vacuum Suction and Gripper System

The Herochu gantry system combines computer-controlled vacuum suction with mechanical gripping in a composite architecture. The vacuum cup array extracts raw sheets from the stack, using multi-point pressure monitoring to verify suction integrity. The mechanical gripper handles finished parts and skeleton removal, eliminating the inefficiency of manual carrying.

The system features intelligent zone-controlled vacuum technology. For an uncut full sheet, all vacuum zones engage to provide maximum holding force. For a nested sheet with finished parts or a fragile skeleton, only the vacuum zones in contact with solid material activate, while the remaining zones stay sealed to maintain pressure. This adaptive strategy allows the system to handle the full range of sheet types, from full plates to complex cut components.

Sheet Separation and Double-Pick Detection

Residual oil film on stacked sheets often causes adjacent plates to stick together. The Herochu system integrates a multi-stage separation cycle: the Z-axis applies a localized micro-bending force to lift the sheet edge, while compressed air nozzles inject high-speed airflow into the sheet gap. Before the transfer motion begins, integrated load sensors and thickness detection compare the measured sheet weight against the current job parameters, blocking double-sheet mis-feeds at the source and protecting the laser cutting head from accidental collision.

High-Speed Gantry Motion Architecture

The Herochu gantry uses a dual-girder composite truss design that evenly distributes heavy bending loads across paired guidance rails. The system is available in 3-axis single or double-arm configurations, with long-stroke designs up to 50 meters and load capacities from 50 kg to over 1000 kg. The gantry traverse speed reaches 10 to 30 m/min, lifting speed is 5 to 10 m/min, and repeatability is held within ±2 mm. High-resolution encoders and closed-loop servo systems ensure that sheet placement matches the programmed nesting layout precisely.

Technical Parameters

Application Benefits and Return on Investment

The Herochu gantry loading and unloading system raises laser cutter utilization from 50–60% under manual operation to over 85%. The core value lies in removing material handling from the critical path and turning it into a background service that runs in parallel with the cutting cycle. A single gantry manipulator can serve two fiber laser cutters simultaneously, clearing skeletons and reloading sheets on one machine while the other continues cutting.

On labor optimization, the system replaces multi-operator manual lifting with single-operator supervision, reallocating labor to higher-value tasks. Scheduled uptime remains above 98%, and low maintenance requirements typically deliver capital payback within 4 to 6 months. For metal fabricators pursuing efficiency gains and cost control, the Herochu gantry system offers a practical automation upgrade path.

Metal sheet handling in modern fabrication demands equipment that balances three competing requirements: load capacity for heavy plates, surface protection for quality-critical materials, and cycle speed for production throughput. Magnetic lifters sacrifice material versatility for grip strength. Chain slings sacrifice surface quality for simplicity. Robotic loaders sacrifice cost-effectiveness for automation. The Herochu pneumatic vacuum manipulator for metal sheets integrates all three requirements in a column-mounted system that handles 300 to 500 kg sheets through vacuum grip, pneumatic balance, and multi-axis positioning. This class of equipment also serves as a pneumatic manipulator for sheet metal crane material lifter applications, combining crane-level reach with vacuum-based plate handling.

Operating Principle: Vacuum Grip Meets Pneumatic Balance

The Herochu HC-RP series manipulator combines two independent pneumatic systems in one machine. The first system generates vacuum at the suction cups — compressed air passes through ejector nozzles that create negative pressure at the cup face, pulling the sheet against the polyurethane lip to form a seal. The second system balances the load weight — air pressure in a cylinder counterbalances the combined mass of the sheet and the boom assembly, allowing the operator to move the load with minimal force.

These two systems work in sequence during every handling cycle. The operator positions the vacuum frame over the sheet, opens the vacuum valve to grip, then moves the sheet through the working area using the balanced boom. At the destination, the operator lowers the sheet to the surface and releases the vacuum valve. The entire sequence takes seconds, and the operator’s physical effort is limited to directional guidance — the pneumatic system carries the weight, and the vacuum system maintains the grip.

This separation of functions matters because it allows each system to be sized independently. A shop handling thin, wide sheets needs maximum vacuum cup coverage but low load capacity. A shop handling thick, heavy plates needs high load balance but can use fewer cups. The Herochu eight-cup, 200 mm diameter configuration serves both extremes because it provides the coverage for thin sheets and the distributed grip strength for heavy plates.

The Eight-Cup Vacuum Array in Practice

Eight vacuum cups arranged across the boom frame provide operational advantages that go beyond simple load distribution. Each cup acts as an independent grip point — if one cup contacts a warped sheet edge, a cut remnant, or a surface irregularity and fails to seal, the remaining seven cups still hold the sheet securely. This redundancy is critical when handling cut parts and remnants that do not present a flat, continuous surface to the cup array.

The 200 mm cup diameter is sized for the contact area needed to maintain vacuum on slightly imperfect surfaces. Smaller cups concentrate force and lose seal easily on warped or oily plates. Larger cups consume boom space and reduce the number that fit on the frame. The 200 mm specification, multiplied across eight cups, provides a total grip area that sustains the full 500 kg load with safety margin.

Cup material is polyurethane, selected for its resistance to the contaminants present on metal sheets — cutting fluid, drawing oil, mill scale dust, and surface rust. The cups flex to conform to slightly curved or warped sheet surfaces, maintaining seal contact where a rigid cup would leak. When cups eventually wear, replacement is a bolt-on procedure that does not require disassembling the vacuum circuit.

Rotation and Reach Geometry

The manipulator’s 220-degree rotation angle defines the working area it can serve from a single column position. Placed at the junction between a storage rack and a machine table, the boom sweeps from the rack position through the full arc to the machine position. The operator does not need to reposition the column or extend the boom to reach different points — rotation alone covers the working area.

The 3600 mm boom length determines how far the boom reaches from the column centerline. At full extension, the vacuum cup frame sits 3600 mm from the column, allowing the manipulator to reach into the center of a 4000 x 2000 mm sheet rack or to place a sheet at the back of a large cutting bed. The 700 mm lifting stroke moves the sheet vertically between rack height and machine table height, accommodating the elevation difference between horizontal storage and processing surfaces.

The 3600 mm column height provides the vertical clearance needed to lift sheets above storage rack sides and machine table edges during the swing from rack to machine. This height also accommodates tall sheet stacks in storage — the operator lifts from the top of the stack without needing to position the boom below the rack top, which would require a different boom approach angle.

Material Range and Application Scope

The Herochu pneumatic vacuum manipulator for metal sheets handles three primary material types without configuration changes: carbon steel, stainless steel, and aluminum. Each material presents different handling characteristics that the vacuum system accommodates automatically.

Carbon steel sheets carry mill scale — the oxide layer formed during hot rolling. This slightly rough surface provides good vacuum seal texture. The cups grip carbon steel reliably across the full thickness range from 1 to 20 mm.

Stainless steel has a smoother, more consistent surface. Vacuum seals form quickly and hold firmly. Stainless sheets are often polished or brushed for visible applications, making the non-marring polyurethane cups essential — any contact mark from a chain or magnet would require rework.

Aluminum sheets are lighter per unit area but larger in format. The oxide layer on aluminum does not interfere with vacuum adhesion. Aluminum’s softer surface is vulnerable to denting from edge contact with chains or forks, but the flat, distributed contact of vacuum cups eliminates this risk.

Beyond metalworking, the manipulator handles plastic sheets within the same weight and size envelope, extending its utility to fabrication shops that process mixed material types on shared equipment.

Control Options: Manual and Automatic Operation

The Herochu manipulator offers both automatic and manual control modes to match different production environments. Manual control gives the operator direct command over vacuum engagement, boom movement, and sheet positioning through hand-operated valves and guided boom motion. This mode suits high-mix production where sheet sizes, materials, and destination positions change with every cycle — the operator adapts in real time without programming.

Automatic control integrates sequence operations for repetitive loading patterns. When a shop runs the same sheet size to the same machine position for extended production runs, the manipulator can execute the grip-swing-place-release cycle with reduced operator input, improving consistency and reducing fatigue across long shifts.

Both control modes operate through the same pneumatic and vacuum systems — the difference is in the control interface, not the lifting mechanics. Shops can start in manual mode and transition to automatic operation as production patterns stabilize, without modifying the manipulator hardware.

Safety Systems for Protected Operation

The emergency air-cut protection system defines the manipulator’s safety architecture. If air supply fails during a loaded cycle, the vacuum holding valve seals immediately, and the sheet remains gripped. The boom balance cylinder also locks, preventing uncontrolled descent. The operator can then guide the load down manually at a controlled rate. This fail-safe design ensures that a utility failure — compressor outage, hose failure, or air pressure drop — never results in a dropped load.

The anti-collision device adds physical protection against operator error. Contact between the boom or frame and an obstruction triggers an immediate stop, preventing the sheet from being driven into a machine edge, rack component, or adjacent structure. Together, these systems allow sustained operation at production pace without the elevated risk that heavy-load handling normally entails.

As a heavy steel plate lifting beam supplier, Herochu engineers the boom assembly to function as a rigid lifting beam that carries plate loads across its full reach while the vacuum cups maintain flat, distributed grip — combining beam structural capacity with vacuum holding power in one integrated system.

In sheet metal fabrication, the transition from storage to processing defines cycle time and throughput. Material that sits in a rack must reach the cutting bed, the press brake, or the welding station quickly, safely, and without surface damage. Traditional cranes handle the weight but introduce swing, chain marks, and operator dependency. The Herochu sheet metal crane material lifter redefines this transition by combining crane-class load capacity with pneumatic balance control and vacuum grip technology, creating a handling system that moves metal plates through space with operator-directed precision.

Defining the Sheet Metal Crane Material Lifter Category

A sheet metal crane material lifter occupies a functional space between overhead bridge cranes and dedicated automated loading systems. It provides crane-level lifting capacity — up to 500 kg per sheet — but mounts on a fixed column and boom rather than running on overhead rails. This mounting method delivers specific advantages for fabrication shops with limited bay height or existing overhead crane infrastructure that cannot be dedicated to a single loading point.

The Herochu HC-RP series fits this category precisely. The 3600 mm column provides the height needed to clear machine tables and storage rack tops. The 3600 mm boom sweeps the 220-degree arc from rack to machine. The vacuum cup frame at the boom end grips the sheet directly, replacing chains, slings, and magnets with a non-marring contact method that preserves sheet surface quality.

Unlike a full gantry loading system, which requires floor-mounted rails, programmable motion control, and significant installation engineering, the column-mounted pneumatic lifter bolts to a single foundation pad and operates immediately after air and anchor connections are complete. This makes it practical for shops that need lifting capability without a capital project timeline.

Lifting Mechanics and Position Control

The defining characteristic of the Herochu crane material lifter is its position control. A standard crane swings a load on a pendulum — the operator manages both the horizontal motion and the resulting swing, requiring constant correction. The pneumatic manipulator eliminates pendulum effect entirely. The boom moves the sheet through a rigid arc, and the pneumatic balance cylinder holds the load at any elevation within the 700 mm lifting stroke without drift.

This stop-and-hold capability changes how operators approach sheet placement. When loading a laser cutting machine, the operator picks the sheet from the rack, swings it to the machine, lowers it to table height, and releases. At each step, the manipulator holds position without additional input. The operator can pause mid-motion to adjust the approach angle, check for obstacles, or reposition their stance — the sheet stays where it was left. No pendulum correction, no brake engagement, no drift.

The 220-degree rotation further extends placement control. The boom rotates the sheet around the column axis, and the vacuum frame rotates the sheet relative to the boom. This dual-axis rotation means a sheet stored flat in a rack can be picked, turned to any orientation, and placed flat on a machine table — all in one continuous motion without setting the sheet down between orientation changes.

Vacuum Grip Technology for Surface Protection

The lifting method matters as much as the lifting mechanics. Chains scratch. Magnets leave marks on thin sheets and fail on non-magnetic materials like aluminum and stainless steel. Forklift forks bend thin-gauge plates. The Herochu vacuum suction cup system avoids all of these failure modes.

Eight cups, each 200 mm in diameter, contact the sheet surface and pull vacuum through pneumatic ejectors. The cups grip the sheet across a wide contact area — not at two edge points like a chain sling, or along one line like a fork. This distributed grip prevents the bending and flexing that thin sheets undergo when lifted from edge points only. A 1 mm thick sheet picked by eight vacuum cups stays flat during transport, while the same sheet lifted by chains would bow and potentially deform permanently.

The non-marring nature of polyurethane cups means polished stainless sheets, painted panels, and pre-finished materials can be handled without surface preparation or post-handling cleanup. For shops fabricating visible-surface products — appliance panels, architectural metalwork, food-grade equipment — this surface protection carries direct economic value in reduced rework and scrap.

Model Selection and Application Mapping

Herochu configures the crane material lifter in two primary models to address different sheet sizes and weights. The HC-RP3015-300 handles sheets to 3000 x 1500 mm at 300 kg maximum. This model serves shops whose cutting beds and material inventory center on standard 3 x 1.5 meter sheets in gauges from 1 to 8 mm. The 300 kg capacity covers the full weight range of these sheets in carbon steel.

The HC-RP4020-500 extends to 4000 x 2000 mm sheets at 500 kg. Shops using larger format material — typically for heavy equipment fabrication, structural work, or thick plate processing — select this tier. The 500 kg capacity handles 20 mm thick carbon steel plate at the maximum sheet dimensions without approaching the structural limit of the boom or column.

Both models support the same material range: carbon steel, stainless steel, and aluminum. The vacuum system does not require material-specific configuration — the cups grip each material type with equal reliability, and the operator does not adjust vacuum pressure or cup arrangement between material changes.

Floor Integration and Installation Requirements

Installation of the Herochu crane material lifter requires a concrete foundation pad capable of supporting the column base plate and the moment loads generated during full-capacity boom extension. The pad dimensions depend on soil conditions and concrete thickness — Herochu provides foundation specifications for each model to guide site preparation.

Compressed air supply is the single utility requirement. The manipulator consumes air during the grip and release phases of each cycle, with minimal consumption during transport when the vacuum holding valve maintains suction. Standard shop air at typical fabrication facility pressure satisfies the system requirements without a dedicated compressor.

The modular structure allows the manipulator to be disassembled for relocation. Column, boom, vacuum frame, and base separate into manageable components, enabling shops to move the lifter between bays or facilities without specialized rigging. This modularity also simplifies initial delivery and installation in facilities with limited access doors or overhead clearance.