| 摘要 |
PROBLEM TO BE SOLVED: To efficiency cut an end face for a clamp margin required for bending with a bender. SOLUTION: A square tubular work 1 having a rectangular cross section is bent from a narrow width side 2b with a bender at the sate its clamp margin 3 is clamped with a clamp 4 (A), successively, the work 1 is transferred to a press forming machine and is subjected to secondary bending for a wide width face 2a by press forming (B), further, a preliminary cut part 8 to a clamp margin 3 side from the upper part of the wide width face 2a and a pierced hole 9 to the other end side are simultaneously formed (C), successively, the work 1 is arranged in vertical long, face cutting is conducted from the upper part of the preliminary cut part 8 with a punch 13 (D). These series of press workings are conducted with the same press machine.
|
