Plug changing mechanism for use in piercing mills
US4022043A · kind A · utility
9Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1975 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Apr 4, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B25/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for changing the plug in a mandrel in which the plug is attached to the mandrel by a detachable interlocking mechanism. The plug is maintained fixed to the mandrel during the displacement of the latter through the blank following piercing and the plug is detached from the mandrel to the rear of the piercing mill towards the end of the rearward displacement of the mandrel. A new plug is then fitted on to the mandrel during the subsequent displacement of the mandrel in the direction of the piercing mill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.