Method for forging/molding a coarse blank of an aluminum transmission shaft
US7234223B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2004 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Nov 11, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4998
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for forging/molding a coarse blank of an aluminum transmission shaft, including steps of: placing burn-in softened aluminum material into a preheated mold; using a first punch head to first forge the aluminum material in the mold cavity from outer side of the molding hole so as to form a blank body of the transmission shaft with two pivot heads wherein one pivot head is located at each end of the transmission shaft and a shorter middle shaft rod; moving out the first punch head and connecting an extension mold with the mold; and immediately using a second punch head to secondarily forge the blank body in the mold cavity from outer side of the extension hole so as to make an end section of the second punch head extend into the mold cavity to a position near the inner end of the mold cavity, whereby the middle shaft rod of the blank body outward axially extends to the extension mold into a predetermined length to form the transmission shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.