Burring method and burring apparatus
US10562091B2 · kind B2 · utility
0Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2015 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Sep 26, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D41/025
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In the present invention, in a piercing punch and a burring punch which are shaft members having a first axis line as the center axis lines and are provided so as to be movable along the first axis line, first, after prepared holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the piercing punch, burring holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the burring punch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.