Spinning processing method and apparatus therefor
US6386010B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Mar 21, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D41/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
According to the spinning processing method of the invention, a steel tube (4) as a work is rotated round its longitudinal axis (X). A plurality of forming rollers (23), which are arranged around the steel tube (4), are rotated round the steel tube axis (X) in the direction (&bgr;) opposite to the direction of rotation for the steel tube (4). The forming rollers 23 are further moved toward the steel tube axis (X) into pressure contact with the steel tube (4), while being moved relatively to the steel tube (4) in the axial direction (A-B) thereof, to draw the steel tube (4) to form a section of reduced diameter. The relative rotation of the steel tube (4) and the forming rollers (23) in the opposite directions (&agr;, &bgr;) increases the relative rotation speed between them and shortens the processing time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.