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Abstract: At present, the common methods of machining cam still are
milling or contour cam machining. This method has low product
efficiency, and can not fit with the mass product requirement. The
method of machining cam is studied based on the CNC turning cam, and
research the key technology of CNC turning cam. The effective method is
presented and one new approach is provided for cam machining. In
general, during CNC turning cam, rake angle and cutting speed will
change greatly along with the cam contour position changing. In order to
ensure the rake angle as constant, employ high frequency linear servo
motor to drive the tool sway with high frequency. To obtain the cam
contour, uses the high frequency linear servo motor to drive the tool
move to-and-fro with high frequency, so the tool will track the cam
contour with real time. In order to ensure the cutting speed as
constant, the new method is presented that the rotate speed of main
shaft will change with the cam contour, by this method, the tool length
will be prolonged and the external roughness of cam will be improved.
Key words: Cam High frequency linear servo motor Tool sways Tool move
to-and-fro Main shaft rotate speed changing Motion control
CLC No: TP273 TM346 TM38
国家“十五”攻关课题(BA203B04). Received 20020718, received in
revised form 20030328
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