| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that speeding up is not viable because retention under a bottom dead center of a slide is a must when an initial punching is executed by an initial drawing punch under a separate operating means in a state to press and hold a blank blanked from a plate stock by the blanking punch with the descending slide in the drawing process. SOLUTION: A separate constituent blanking punch operating means from behavior of the slide 5 enables the blanking punch 34 to be driven, and after the blanking punch 34 advances and blanks, retention occurs and in a state to press and hold the blank, the initial punch 36 A advances and executes the initial drawing with the descending slide 5 and then, retention for wrinkles holding under the bottom dead center of the slide is no more necessary. As a result, the stroke number of the slide 5 is quickened so that a high-speed driving of the press becomes possible.
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