Method and apparatus for hot forming a polygonal head on a snap tie rod
US4473738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1981 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | Oct 5, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/46
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for hot forming a polygonal head on an end of a tie rod includes a split electrode for gripping a tie rod and a reciprocating electrode for deforming the tie rod end. One of the electrodes defines a die cavity having walls forming a polygonal contour and a depth greater than a predetermined thickness of the tie rod head to be formed, and the other electrode includes a boss positioned in registry with the die cavity such that the boss may enter the cavity upon movement of the reciprocating electrode into abutment with the split electrode, thereby forcing the heated end of a tie rod into the polygonal contour of the cavity. The preferred method includes intermediate steps of lightly gripping the rod by the split electrodes and lightly contacting the rod tip by the reciprocating electrode to locate the rod accurately with respect to the die cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.