Method of fabricating shaft from metal plate
US6006579A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1999 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Jan 20, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K21/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming integrally an axis on a metallic plate at an arbitrary position thereof and perpendicular to a surface thereof. A first surface of the metallic plate is place on a first die having a first diameter opening and a second surface of the metallic plate, opposing the first surface, is pressed with a first punch to form a projection from the first surface via half blanking or forward squeezing. The projection has a tip surface extending into the first diameter opening a first distance from the first surface. The first surface of the metallic plate is then placed on a second die having a depression with the projection extending into the depression. The depression has a second diameter and a depth distance greater than the first distance. The second surface of the metallic plate is then contacted with a second punch causing the tip surface of the projection to contact a bottom surface of the depression and form the axial projection via rear-squeezing. The axial projection has a tip surface extending a second distance from the first surface, greater than the depth distance of the depression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.