Positional reference system for ultraprecision machining
US4365301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Sep 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2502
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A stable positional reference system for use in improving the cutting tool-to-part contour position in numerical controlled-multiaxis metal turning machines is provided. The reference system employs a plurality of interferometers referenced to orthogonally disposed metering bars which are substantially isolated from machine strain induced position errors for monitoring the part and tool positions relative to the metering bars. A microprocessor-based control system is employed in conjunction with the plurality of position interferometers and part contour description data inputs to calculate error components for each axis of movement and output them to corresponding axis drives with appropriate scaling and error compensation. Real-time position control, operating in combination with the reference system, makes possible the positioning of the cutting points of a tool along a part locus with a substantially greater degree of accuracy than has been attained previously in the art by referencing and then monitoring only the tool motion relative to a reference position located on the machine base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.