Patent ID: 8047033
Filing Date: 2011-11-01
Classification: B21C,B21D

Abstract:
1. A plastic working system in which a coil material, which is a workpiece, is converted to be intermittently sent to a press device of a plurality of press devices and plastically worked, the plurality of press devices being arranged so that the coil material is worked by the plurality of press devices in order, comprising: a first slack watching means for watching a slack which is generated in the coil material intermittently sent out from one press device by intermittent feeding; a second watching means for watching a slack of the coil material generated at the time of feeding the coil material to a succeeding press device; and a feed adjusting device for controlling an operation speed of a preceding press device or a feeding speed at the time of feeding the coil material to the succeeding press device, wherein the feed adjusting means includes a feeding means for converting intermittent feeding of the coil material to continuous feeding of the coil material sent from the first slack watching means, wherein operation of the feeding means is controlled according to a slack, which is watched by the first slack watching means, caused by intermittent feeding of the coil material which is sent from the preceding press device, and wherein a slack of the coil material, at the time of feeding the coil material to the succeeding press device, is watched by the second watching means so as to control operation of the preceding press device.