Press for hydrostatic extrusion of tubes
US3994149A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | May 22, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/217
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A press for hydrostatic extrusion of tubes includes a die having a die opening therein and a mandrel projecting into the die opening and forming therewith a gap for shaping the tubular billet into a tube. The mandrel includes a carrier with a bore therein and a tip inserted in and filling the bore of the carrier. The tip includes an outer sleeve of hard metal and a core filling the sleeve formed of a material which has approximately the same E-modulus of the material of the carrier, such as steel. The inner end of the sleeve is enlarged and the front part of the carrier is compressed around the tip to fix the tip axially in the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.