Positional reference system for ultraprecision machining

Details Positional reference system for ultraprecision machining Positional reference system for ultraprecision machining

1980-09-12

1982-12-21

Ruggiero, Joseph F.

Boots, shoes, and leggings

82 2B, 318640, 356358, 364560, 364167, G06F 1546, G01B 1102

Patent

active

043653014

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.

REFERENCES:
patent: 3708657 (1973-01-01), Kelling
patent: 3779647 (1973-12-01), Dawson
patent: 3786332 (1974-01-01), Hepner et al.
patent: 3812376 (1974-05-01), Takeyama et al.
patent: 3884580 (1975-05-01), Webster et al.
patent: 4221995 (1980-09-01), Barkman

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