Abstract
Press machine with a differential rotary to linear conversion mechanism was manufactured in order to evaluate the positioning performance of a punch. This differential rotary to linear conversion mechanism consisted of two rotary shafts, a rotation/translation shaft, three spur gears and a connecting block. A punch was attached to the end of the rotation/ translation shaft. In the positioning accuracy test of the punch, the positioning accuracy of the press machine was equivalent to that of the feed screw mechanism with a ball screw. In the input-output characteristics test, the press machine had superior input-output characteristics compared with the feed screw mechanism. Lastly, V bending work could be done by the press machine developed in this study.
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