Method of making a flanged tubular metallic part
US7013696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Apr 12, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a flanged tubular metallic part by cold forging is provided. The method comprises a step of forming an axial depression in a blank and a flange forming step of making the depression axially deeper while causing a metal of the blank to flow radially outward thereby forming the blank into an intermediate product having a flange. The flange forming step includes axially moving an inner punch of a die assembly so as to cause a leading end of the inner punch to be positioned more forward than a backward side surface of the flange thereby causing the intermediate product to be formed with a sleeve portion that is position backward of the flange while allowing an outer punch of the die assembly to apply a biasing force to a backward side surface of the flange during formation of the flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.