Grinding machine with a re-truing device
US4151684A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1977 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Oct 13, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B49/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A grinding machine wherein a CBN grinding wheel is rotatably carried to grind a workpiece on a work support device and is provided with a re-truing device, in addition to a truing and dressing device rotatably carrying a truing roll and a counter roll. When a truing and dressing instruction is generated, the CBN wheel is first trued with the truing roll, is then dressed by free abrasive grain supplied between itself and the counter roll and is finally re-trued with a diamond impregnated truing bar carried on the re-truing device. A re-truing infeed of the truing bar against the CBN wheel is considerably less than a truing infeed of the CBN wheel against the truing roll, and therefore the re-truing is effected on cutting edges of the wheel abrasive grain damaged by the free abrasive grain in dressing, whereby the cutting edges are made somewhat dull.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.