Edge-Forming Die Blocks for a Sheet Metal Press
Matched pair of Cr12 edge-forming die blocks, vacuum hardened to HRC 58-62 with the forming face ground to ±0.01 mm.
Machining details
A stamping line needed a matched pair of edge-forming die blocks to hold the blank flat while the punch forms the edge. The previous blocks had worn at the forming radius and no longer closed evenly, which left a wave along the flange.
Both blocks were milled from Cr12 plate as a matched pair, with the cavity and the locating bores cut in the same clamping so the two halves stay symmetrical. After vacuum quenching to HRC 58-62, the forming faces were ground to ±0.01 mm and checked against each other on a surface plate.
The pair was delivered as a set in 16 working days with a hardness record and a face flatness report. Rework is limited to regrinding the forming face, so the customer keeps the same pair in service instead of replacing both blocks.
| Material | Cr12 tool steel, vacuum quenched HRC 58-62 |
|---|---|
| Tolerance | Forming face ±0.01 mm, flatness 0.02 mm/m |
| Surface treatment | Vacuum quench, nitriding, ground face Ra 0.8 |
| Process | CNC milling, wire EDM, heat treatment, grinding |
| Batch size | 20 pairs |
| Lead time | 16 working days |
