Method of reducing thermal distortion in grinding machines

Details Method of reducing thermal distortion in grinding machines Method of reducing thermal distortion in grinding machines

2005-05-03

2005-05-03

Morgan, Eileen P. (Department: 3723)

Abrading

Precision device or process - or with condition responsive...

Controlling temperature

C451S010000, C451S011000, C451S053000

Reexamination Certificate

active

06887128

ABSTRACT:
The invention provides a method of reducing thermal distortion in grinding machines. Such machines each comprise a machine base (60) and a grinding wheel (50) for grinding components in the machine (10). The method includes the steps of: (a) sensing a first temperature at an upper surface of the base (60) substantially below a position (110) in the machine (10) whereat component grinding using the wheel (50) occurs; (b) sensing a second temperature of an underside surface of the base (60) substantially below the position (110) whereat component grinding occurs; (c) determining a relationship between component size drift and changes in a difference between the first and second temperatures; and thereafter (d) correcting a positional offset applied to the wheel (50) during grinding in accordance with the determined relationship, thereby reducing the component size drift. Preferably, the relationship is substantially a linear function of the form MDS=Kf(ΔT1−ΔT2) although higher-order polynom be applied if required. The invention also relates to grinding machines (10) employing the method of reducing thermal distortion.

REFERENCES:
patent: 4450652 (1984-05-01), Walsh
patent: 4587765 (1986-05-01), Matsui
patent: 5556321 (1996-09-01), Kasahara et al.
patent: 5871389 (1999-02-01), Bartlett et al.
patent: 6301009 (2001-10-01), Tinker
patent: 6383057 (2002-05-01), Bartlett et al.

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