Unova UK Limited

Christopher Shaun Thorpe

Stephen Roger Coverdale

David Thomas Proctor

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

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Crosshills, United Kingdom

Christopher Shaun Thorpe