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1. (WO2018180820) SHEARING METHOD, SHEARING DEVICE, AND SHEARING FACILITY

Pub. No.:    WO/2018/180820    International Application No.:    PCT/JP2018/011209
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 21 00:59:59 CET 2018
IPC: B21D 28/34
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
Inventors: YASUTOMI Takashi
安富 隆
YONEMURA Shigeru
米村 繁
YOSHIDA Tohru
吉田 亨
Title: SHEARING METHOD, SHEARING DEVICE, AND SHEARING FACILITY
Abstract:
This shearing method for fracturing a plate-shaped workpiece (6) by causing a shear force to act in a thickness direction of the workpiece (6) includes: a step of starting to cause a shear force to act on the workpiece (6), with a clearance (C) between points of action (21, 31) in the direction of a plane perpendicular to the thickness direction of the workpiece (6); a step of causing the shear force to act, after starting to cause the shear force to act until a fracture surface is generated in the workpiece (6); and a step of increasing the clearance (C) in accordance with a deformation in the thickness direction of the workpiece (6), during a period after starting to cause the shear force to act until said fracture surface is generated in the workpiece (6).