Method of manufacturing an undercut deep-drawn workpiece
US5775159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | May 22, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/88
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing of an undercut deep-drawn workpiece from a sheet material including deforming a sheet material into a pot-shaped piece having a circular cross-section with a diameter, which decreases in a course of deformation, while retaining a flat circumferential rim flange, increasing a depth of the pot-shaped piece with formation of an outwardly cambered bottom substantially simultaneously with decreasing the diameter of the pot-shaped piece, forming, one after another, two opposite flat surface side walls on the pot-shaped piece, with bringing them into divergent, relative to each other, angular positions, while synchronously flattening the bottom of the pot-shaped piece, and forming two further opposite parallel flat surface side walls to obtain a substantially rectangular cross-section of the pot-shaped piece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.