Burring processing method
US10384251B2 · kind B2 · utility
2Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2016 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Mar 9, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D28/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In performing burring processing on a sheet-like member, the following processes are performed: a punching process of performing punching processing of the sheet-like member; a hole expansion process of performing hole expansion processing of a punched hole formed by the punching process; a re-punching process of performing punching processing again on a portion surrounding the punched hole expanded by force in the hole expansion process; and a burring process of pushing a portion surrounding a re-punched hole that is a punched hole formed by the re-punching process and forming a vertical wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.