Title:
BENDING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/158352
Kind Code:
A1
Abstract:
This bending method uses a die (10, 50) having, in an upper portion (11, 51) thereof, a V groove (12, 52), and a punch (30) provided with a first surface (33, 33a, 33b, 33c) and a second surface (35, 35a, 35b, 35c) on a workpiece-pressing part (31). When mounted on an upper table (130) of a press brake (100, 200), the first surface (33, 33a, 33b, 33c) is parallel to a first groove wall surface (13) of the die (10, 50) mounted in a lower table (110, 210). An angle (θ2) formed by the second surface (35, 35a, 35b, 35c) relative to a vertical plane is different from an angle (θv/2) formed by a second groove wall surface (15) relative to the vertical plane. A plate-shaped workpiece (W) mounted in the die (10, 50) is bent in a state in which the workpiece (W) is sandwiched between the first groove wall surface (13) and the first surface (33, 33a, 33b, 33c).
Inventors:
KAWASAKI HIDEKATSU (JP)
Application Number:
PCT/JP2022/000749
Publication Date:
July 28, 2022
Filing Date:
January 12, 2022
Export Citation:
Assignee:
AMADA CO LTD (JP)
International Classes:
B21D5/02; B21D19/08
Foreign References:
| JP2631813B2 | 1997-07-16 | |||
| JPH11719A | 1999-01-06 | |||
| JPH0687028A | 1994-03-29 | |||
| JP2004098105A | 2004-04-02 | |||
| JP2004034059A | 2004-02-05 | |||
| JP2021007214A | 2021-01-21 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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