Compound die assembly
US4501179A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1982 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Sep 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9476
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A compound die assembly adapted to produce large-sized parts having a plurality of holes, complicated holes and/or lengthy holes wherein a blanking die (103) and a blanking punch (203) are made by wire-cut electro-discharge machining and are directly fixed onto a punch holder (101) and a die holder (201), respectively, a knockout plate (109) and a stripper plate (204) are also made by wire-cut electro-discharge machining and are fixed by hanger bolts onto the punch holder and the die holder through polyurethane rubbers (111, 206), respectively. Guide posts (30) are fixed to the punch holder and extends through the die holder downwardly. A mount (40) to be fixed onto the press bolster has a flat top surface on which the die holder is fixedly mounted and has a plurality of guide-post-receiving holes (401) in which coil springs (402) are contained to raise the guide posts received together with the punch holder. A plurality of load-supporting elements (50) are fixed onto the bottom surface of the die holder near slug clearance holes thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.