Method for manufacturing a rocker arm
US5887474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1998 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Mar 18, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49295
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method and apparatus for forming an outwardly extending tubular portion in a side wall of a workpiece, such as a rocker arm. The method includes the following steps: (1) positioning the workpiece in a punch press having a central shaft with a movable punch mounted in an aperture formed in the central shaft for lateral sliding movement with respect to the shaft; (b) extending the central shaft into the interior cavity of the workpiece; and (c) actuating lateral sliding movement of the movable punch against the side wall of the workpiece to cold form the outwardly extending tubular portion in the side wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.