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Abstract：
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Through the study of electric punch,a new link and ball screws power source was designed.The power source used servo moter to drive the ball screw to make the screw nut moved up and down.In turn,the specially designed three-hinged rod was driven.Without control procedures,it could be able to have functions for the no-load fast-forward,return,slow-forward with load.Without increasing the motor power、torque and the force of the ball screw,cutting edge force can be increased over 4 times.
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Funds：
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AuthorIntro：
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Reference：
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