| 摘要 |
PURPOSE:To improve the blanking accuracy and the yield by providing a press machine on every line of a formed part, and also, providing a tension roller device between each press machine. CONSTITUTION:C frame press machines 8, 9 of two pints are provided by shifting the positions in the width direction and the feed direction so that they correspond to each line of a formed part. Also, a tension roller device 15 provided with a pair of tension rollers 16, 17 is installed between the press machines 8, 9. First of all, by the press machine 9 of the downstream side, one side of a coil material 1 is blanked, and subsequently, the other side is blanked by the press machine of the upstream side. In this case, positioning is executed exactly through a width guide 23 provided on the entry of the device 15, and a positioning device provided on its vicinity. Since zigzag blanking is executed by giving a tension to a coil material by plural press machines, the blanking accuracy and the yield are improved.
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