Method of making one-piece tubular axle blanks and the produced axle blanks
US4380480A · kind A · utility
10Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Apr 19, 1983 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for the economical manufacture of one-piece tubular axle blanks of the type having a center portion with journals at both ends. The method involves quenching a length of a preheated steel tube followed by tempering and then swaging at both ends by forging or hammering. The areas of transition between the center portion and the respective journals are thickened by upsetting, and the ends of the axle blank are subsequently locally heat treated by annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.