The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2005
Filed:
Jan. 07, 2002
Michael George Pierse, Bedford, GB;
Michael George Pierse, Bedford, GB;
UNOVA UK Limited, Aylesbury, GB;
Abstract
The invention provides a method of reducing thermal distortion in grinding machines. Such machines each comprise a machine base () and a grinding wheel () for grinding components in the machine (). The method includes the steps of: (a) sensing a first temperature at an upper surface of the base () substantially below a position () in the machine () whereat component grinding using the wheel () occurs; (b) sensing a second temperature of an underside surface of the base () substantially below the position () 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 () 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=K(ΔT−ΔT) although higher-order polynom be applied if required. The invention also relates to grinding machines () employing the method of reducing thermal distortion.