Method and apparatus for compensating the variable weight of a mass acting on a hydraulic drive, in particular for the upright drive cylinder of a lapping machine
US4712470A · kind A · utility
22Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1987 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jan 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B49/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool, in particular a lapping wheel, is to be positioned by a hydraulic drive cylinder and subsequently pressed against a workpiece. For this purpose a position control and a pressure or force control is provided. The weight change of the lapping disk subjected to wear is automatically detected by measuring the pressure value which is necessary to keep the weight in a state of suspension without support. The pressure value is stored and in the subsequent pressure regulating operation fed as compensating parameter to the pressure control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.