Shaft diameter enlargement condition setting method, shaft diameter enlargement method and shaft diameter enlargement apparatus
US11565307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | May 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K23/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for setting conditions for a shaft diameter enlargement, a shaft diameter enlargement method, and a shaft diameter enlargement apparatus are provided. A controller of the shaft diameter enlargement apparatus controls a compressing section, a bending section, and a rotating section to enlarge an intermediate portion of a shaft workpiece to have a predetermined outer diameter by rotating the shaft workpiece about its axis with axial compressive force a bending angle being applied to the intermediate portion. The controller determines whether the shaft workpiece is acceptable, based on the number of rotations of die shaft workpiece required for enlarging the intermediate portion to have the predetermined outer diameter or based on an enlargement ratio of the intermediate portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.