Unova UK Limited

David Thomas Proctor

Stephen Roger Coverdale

Christopher Shaun Thorpe

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

Growing community of inventors

Skipton, United Kingdom

David Thomas Proctor