Workpiece holder for a vertical broaching machine for broaching annular workpieces
US4184691A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Feb 21, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/406125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A workpiece holder for a vertical broaching machine for broading annular workpieces is particularly useful for simultaneous broaching of two ball-bearing races in the rings of homokinetic joints. A workpiece support, rotatable relative to a baseplate about a common axis and accepting the workpiece coaxially by means of a tightening device, is nonrotatably connected to a double-ended piston which can be subjected to the action of pressure-oil, the piston being guided rotatably and axially displaceably between two end positions in a cylinder. Complementary set of teeth are provided at one end of the piston and on a facing surface, nonrotatably connected to the baseplate, these teeth being in mesh when the piston is in the first end position, thus centering the piston and holding it in a nonrotational manner. A first pressure-oil connection terminates in the chamber delimited by the teeth, the piston being displaced axially to the other end position when the chamber is pressurized with pressure-oil, with the teeth being out of mesh when the piston is in the latter position. An additional chamber, connected to a second pressure-oil connection, is formed between the piston and the cylin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.