Title:
圧延加工装置、湾曲加工方法
Document Type and Number:
Japanese Patent JP6479556
Kind Code:
B2
Abstract:
A bending method according to the present invention feeds a long workpiece material (Wa) made of metal and having a plurality of thickness portions (w1 and w2) disposed at different angles between rollers (13, 14, 15, and 16) and bends the workpiece material (Wa) while rolling the workpiece material with the rollers (13, 14, 15, and 16). According to the bending method, an initial shape of the workpiece material (Wa) is a straight line or a bend with a bend radius dimension larger than a target bend radius dimension, a thickness dimension of a cross section of the workpiece material (Wa) along a bend radius direction is set to increase from an inner side toward an outer side of the bend radius direction, the workpiece material (Wa) is fed between the rollers (13, 14, 15, and 16) and rolled in a way that an amount of rolling in a region corresponding to the outer side of the bend radius direction is larger than an amount of rolling in a region corresponding to the inner side, and the workpiece material (Wa) is bent to have the target bend radius dimension from the initial shape.
Inventors:
Takahiro Tachibana
Shinmura
Shin Yoshida
Hiroaki Matsui
Shinmura
Shin Yoshida
Hiroaki Matsui
Application Number:
JP2015090307A
Publication Date:
March 06, 2019
Filing Date:
April 27, 2015
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
Aisin Light Metal Co., Ltd.
Aisin Light Metal Co., Ltd.
International Classes:
B21D11/20; B21B1/09; B21B1/092; B21B1/095; B21B1/098
Domestic Patent References:
| JP57156813A | ||||
| JP4059102A | ||||
| JP61099526A | ||||
| JP11019745A |
Foreign References:
| GB624169A | ||||
| US2093933 |
Attorney, Agent or Firm:
Noriharu Fujita
Kunio Ueda
Kunio Ueda