What are the main causes of crankshaft turning deformation? What measures should be taken to control crankshaft turning deformation?

The main causes of crankshaft turning deformation are as follows:

(1) Static unbalance of workpiece.

(2) The top or support bolt is too tight.

(3) The top hole is not drilled correctly.

(4) Affected by cutting force and cutting heat.

(5) The accuracy of the lathe is low and the cutting speed is improperly selected.

The measures to control crankshaft turning deformation are as follows:

(1) Accurately machine the center hole and grind the center hole if necessary.

(2) Carefully correct the static balance of the workpiece.

(3) The tightness of the top of the top or supporting bolt shall be appropriate, except for the cutting part,

Other parts shall be firmly jacked with supporting bolts.

(4) It is divided into rough and finish machining stages.

(5) Pay attention to adjusting the lathe spindle clearance.