Sheet Metal Material Storage with Integrated Loading – Herochu Compact Tower Series

Conventional sheet metal warehouses separate storage from loading. Racks hold raw material; a separate loading station – often a manual magnetic lifter or a dedicated unstacker – feeds the machine. This separation breeds inefficiency: double handling, extra floor space, and two points of potential alignment error. Herochu reengineers this workflow with the concept of sheet metal material storage with integrated loading. Here, storage shelves and loading mechanics occupy the same structural frame, sharing the same controller, same footprint, and same operational rhythm.

The Herochu Compact Tower Series exemplifies integrated loading across multiple models, with the HC-A4015 as the flagship for medium-format sheets (up to 4,000 mm × 1,500 mm). In this system, every shelf is a potential source for the next blank, and the loading mechanism never travels further than the height of the tower. This integration reduces the distance between raw material and cutting head to the absolute minimum – often under two meters.

How Integrated Loading Eliminates Intermediate Stations

To understand the value, examine a typical automated line without integration: an AS/RS tower retrieves a pallet of sheets, deposits it onto a conveyor, which moves to a destacker, which separates the top sheet and centers it on a roller table, which finally presents it to the laser. That sequence involves four handoffs. Each handoff requires mechanical alignment, risking edge damage and positional drift.

Herochu’s sheet metal material storage with integrated loading collapses these four handoffs into one. The telescopic fork moves directly from the storage shelf to the cutting table inlet. Vacuum cups lift the sheet, the fork retracts, travels vertically to the inlet height, extends again, and places the sheet. Alignment is maintained because the fork’s position relative to the sheet is registered by encoder feedback on the linear guides. The control software knows exactly where every sheet originated and where it must go.

This integration yields measurable benefits: cycle time from storage to cutting drops from typical 90–120 seconds to under 25 seconds. Accumulated positional error of ±1 mm in conventional systems shrinks to ±0.2 mm in Herochu’s design. Scratches from sliding sheet edges against roller conveyors vanish because the sheet never slides – it is lifted and placed directly.

Shelf Configurations and Load Capacities

The integrated loading storage system supports sheet formats from 3,015 mm × 1,500 mm up to 6,025 mm × 2,500 mm. Number of storage floors ranges 8 to 13, adjustable via add-on shelf modules. Load per layer is selectable between 3 tonnes and 5 tonnes, depending on structural reinforcement requested by the customer.

Vertical lifting uses linear guide rails plus chain drive, providing smooth acceleration and deceleration that prevents sheet slippage. The integrated loading mechanism itself – the telescopic fork with vacuum suction – is rated for a per-cycle payload of 200 kg. This is sufficient for standard 3 mm mild steel sheets up to 6 meters length (approximately 140 kg) and comfortably handles aluminum plates up to 8 mm thickness.

A notable feature of Herochu’s integrated storage is the plate support system: optional selection of roller supports, brush tables, or air flotation. For brushed stainless steel or pre-coated sheets, brush supports eliminate any risk of scratching during the extraction motion. For high-speed applications where low friction is paramount, air flotation lifts the sheet on a cushion of compressed air before the fork extends.

Real-Time Inventory Management

The integrated storage system does more than move sheets – it knows what it moves. Herochu’s control software interfaces directly with your ERP or MES. When a work order for 100 blanks of 2 mm galvanized steel arrives, the system polls its internal database, locates the shelf containing that material, and confirms sufficient quantity. It then executes the loading cycle, decrements the inventory count in real time, and sends a confirmation back to the ERP.

For remnant management, the integrated loading system registers the unused portion of a sheet after cutting. Operators can instruct the system to return the remnant to a dedicated shelf or to a “remnant zone” within the storage tower. The software records remnant dimensions and material grade, making them available for future nested jobs. This closed-loop inventory control typically reduces raw material scrap by 5–10 % within six months of installation.

Energy Efficiency and Diagnostics

Herochu integrated storage systems incorporate variable-frequency vacuum pumps that adjust suction power to match sheet surface roughness. For smooth sheets, the pump runs at reduced power, cutting electrical draw by 35 % compared to fixed-frequency alternatives. The linear guide rails are lubricated for life, eliminating scheduled greasing. Remote VPN accessibility enables Herochu’s service engineers to run predictive diagnostics – monitoring chain tension, bearing temperatures, and servo motor currents – and alert you to upcoming maintenance before a failure occurs.

Safety Compliance

The sheet metal material storage with integrated loading meets ISO 13849‑1 safety standards through Category‑4 architecture. Dual-channel emergency stops, redundant contactors, and light curtains at all access points ensure that any unauthorized entry halts all motion within 50 ms. The telescopic fork’s vacuum system includes pressure sensors that detect loss of suction; if a sheet drops, the fork immediately retracts and an alarm notifies the operator. No debris is left on the cutting table.

Conclusion: From Storage to Spindle in One Motion

Herochu’s sheet metal material storage with integrated loading is not an incremental improvement – it is a fundamental rethinking of how raw stock should flow to the cutting machine. By merging storage and loading into a single mechanical and control domain, Herochu eliminates handoffs, slashes cycle times, and frees floor space for value-adding work. For fabricators serious about lean manufacturing, this integrated approach is the new baseline.