| 摘要 |
PURPOSE:To prevent the previous working position from being shifted due to a distortion of a plate material, and to improve the finish accuracy of a finished product, by determining a order of punch working at the time of performing plural punch workings to one piece of plate material. CONSTITUTION:When there are two or more member for which a high accuracy is required with regard to a shape working 25, an interval working, etc., a plate material W is decomposed into plural areas such as to the upper and lower parts, or the right and left, etc. Subsequently, a punch hole for absorbing a stress is made in the middle of each area, and each part 25, 27 is dispersed and placed in the decomposed areas. In this way, the shape working 25 and the interval working 27 are not subjected to a stram by the subsequent working, and its shape and intervals can be maintained as prescribed ones.
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