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:
Jul. 27, 2004
Filed:
Aug. 29, 2002
Stephen Roger Coverdale, Shipley, GB;
David Thomas Proctor, Skipton, GB;
Christopher Shaun Thorpe, Crosshills, GB;
UNOVA UK Limited, Ayelsbury, GB;
Abstract
A method is described for grinding a crankpin of a crankshaft using computer controlled wheelfeed and headstock drives ( ). During a final grinding step leading to finish size the cutting force is maintained on the wheelhead ( ) to keep the wheel ( ) and pin under a moderate constant load and the rotational speed of the headstock drive ( ) is reduced. This serves to prevent bounce and chatter marks appearing in the surface of the pin. The rotational speed is typically in the range of 1 to 5 rpm. During the final step of grinding each pin, the wheelfeed is adjusted so as to remove a sufficient depth of material during a single rotation of the crankshaft, to bring the crankpin to finish size. In order to determine the depth of cut required, each pin is gauged