Auxiliary Equipment & Complete Fine Blanking Lines

Coil Feeding & Decoiling Systems

Consider a 15,000 kg coil of 16MnCr5 with 2 mm of crown variation. Fed directly into a fine blanking die without leveling, that coil produces parts with 0.3 mm flatness errors — enough to push a ±0.1 mm tolerance band out of spec across an entire shift. Our decoiler-straightener-feeder line eliminates this variation before the strip reaches the die entry.

Feeding accuracy: ±0.1 mm pitch repeatability with SICK absolute encoder feedback, synchronized to the press stroke rate. Decoiler capacity: up to 15,000 kg coil weight with automatic tension profiling across the full coil diameter range — from 1,200 mm full coil to 400 mm core. Straightener: 5-7 roll configuration sized to material thickness and yield strength, eliminating coil-set, crown, and edge wave before the strip enters the servo feeder.

Why it matters: Feed accuracy drifting over a shift is rarely the feeder itself — it is decoiler tension creeping as the coil diameter shrinks. We tune tension profiles across the entire coil run, not just at start-up. A coil that starts flat at full diameter and arrives warped at the core costs a full shift of scrap before anyone notices the dimensional drift.

Tooling design determines whether a fine blanking press delivers its full capability. A die built for the wrong material or volume will produce parts within tolerance — for the first 10,000 strokes. After that, V-ring degradation, clearance drift, and cutting-edge wear turn a good die into a scrap generator. Our die design office sits beside the press engineering team, so machine parameters and mold geometry are validated together from the first trial.

Tool steel selection: D2 tool steel (60-62 HRC) for medium-volume production up to 100,000 strokes between sharpenings. Powdered metal steel (PM) for high-volume applications requiring 300,000-500,000 strokes between regrinds. Solid carbide inserts for ultra-high-volume cutting edges on abrasive materials. V-ring geometry: Triangle impingement profile for standard materials; ASV (asymmetric V-ring) profile for high-strength steels above 600 MPa tensile strength, where deeper impingement is needed to prevent material flow during shearing.

Clearance: 0.5% of material thickness for die-punch clearance — a 2 mm part gets 0.01 mm. This tight clearance is what produces the burr-free, tear-free edge that distinguishes fine blanking from conventional stamping.

Design capabilities: Strip layout optimization with nesting efficiency analysis, multi-stage progressive tooling for complex geometries, counter-pressure and ejection strategy tuned to part geometry, simulation-based force verification, and rapid prototyping for first-article validation.

Heat treatment: Vacuum hardening to 60-62 HRC for D2 tooling, with cryogenic treatment for PM steel to stabilize carbide structure and extend die life by 30-40%. Surface coating: TiCN coating reduces friction and extends edge life by 2-3x on abrasive materials. DLC coating for ultra-high-volume applications where lubricant retention on the cutting edge is critical.

Scenario: A die producing 50,000 parts per month in 16MnCr5 (1.7131) needs PM tool steel with TiCN coating to reach 300,000 hits before regrind. With standard D2 and no coating, the same die would require sharpening every 80,000-100,000 strokes — three to four production stoppages per month for die maintenance. Our die shop handles machining, wire EDM, grinding, and assembly in-house — the entire tooling lifecycle stays under one roof.