Patent ID: 9044912
Filing Date: 2015-06-02
Classification: B21D,B30B

Abstract:
1. An operation method of an electric press working machine at least including a frame body that is formed by using a bed, a crown, and a plurality of support posts, a first slide that slides on the support posts, a second slide that slides on the support posts, a first-side drive source that is so provided as to drive the first slide, a second-side drive source that is so provided as to drive the second slide, and a first upper die that is so attached as to correspond to the first slide, and a second upper die that is so attached as to correspond to the second slide, wherein the first-side drive source repeatedly raises or lowers the first slide, and the second-side drive source repeatedly raises or lowers the second slide, and a press working operation of processing a to-be-molded article by using a lower die, which is so attached as to correspond to the bed, and the first and second upper dies is continuously repeated, the operation method characterized by comprising: a step of moving the first and second slides to a first position; a step of moving the second slide to a second position while keeping the first slide at the first position; and a step of moving the second slide to a third position while keeping the first slide at the first position.