Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billet
US10265746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2017 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Apr 19, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C25/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a rotary extrusion producing method for producing an inner ring rib with a large aspect ratio formed of a hollow billet, which includes: combining, at an initial stage of rotary extrusion, two convex dies together and driving, by a slider on a press machine, left and right half convex dies to extrude a blank downward to form an initial profile of a transverse rib; dragging respectively, by left and right horizontal hydraulic cylinders, the left and right half convex dies to move in a radial direction, to form an initial cylindrical wall, so as to achieve a purpose of forming the transverse rib, once the blank is extruded downward by a certain depth, where a head of a mandrel is set to be at a certain conical degree, and a certain number of processed pits are distributed on an inner cavity of a concave die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.