Grinding machine with feed rate changing apparatus
US3952458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Jul 16, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q15/225
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A grinding machine provided with an apparatus for changing a feed rate of a grinding wheel relative to a workpiece just before the grinding wheel comes into contact with the workpiece. An electrode device is mounted adjacent to the grinding wheel and connected to an electric power source for applying a potential to the surface of the grinding wheel. A detecting device detects a difference of potential between the grinding wheel and the workpiece to generate an output voltage. A memory device memorizes the output voltage detected when the grinding wheel is distant from the workpiece. A setting device reduces the memorized output voltage at a predetermined rate to provide a reference voltage corresponding to a predetermined gap between the grinding wheel and the workpiece. A comparator circuit compares the output voltage with the reference voltage to generate a feed rate changing signal when the output voltage attains the reference voltage. A control device controls a feed device so as to change the feed rate of a wheel slide in accordance with the feed rate changing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.