公开(公告)号：US06644091B2

公开(公告)日：2003-11-11

申请号：US09746408

申请日：2000-12-20

Applicant: Fu-Shun Huang ,  Chun Lin Chang

Inventor： Fu-Shun Huang ,  Chun Lin Chang

IPC: B21D3704

CPC classification number: B21D5/0236 ,  B21D5/0209

Abstract: A lower die (10) for a bending machine includes a support member (40) and a work member (60), manufactured separately. The support member defines a longitudinal groove (44) in an upper surface thereof, a pair of longitudinal V-shaped slots (48) in opposite side walls thereof, and a plurality of screw holes (42) in a bottom surface thereof. A pair of shoulders (46) is formed on opposite sides of the groove. The work member comprises a position portion (66) for being accommodated in the groove, a pair of projections (68, 70) for abutting against the shoulders, and an upper wedge-shaped groove (72) for shaping a workpiece. The lower die is secured on a die shoe (20 or 20′) by screws (12) which extend through the die shoe and engage with the screw holes, or by engagement of the V-shaped slots with V-shaped protrusions (29′) of the die shoe (20′).