Method for forging/molding a coarse blank of an oil cylinder
US7055359B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2004 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Dec 16, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4927
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for forging/molding a coarse blank of an oil cylinder, 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 oil cylinder with a first end cap, a second end cap and a shorter cylinder body; 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 and making the 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 cylinder body of the blank body outward axially extends to the extension mold into a predetermined length so as to form the oil cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.