PRODUCTION METHOD FOR COLD ROLLED STEEL SHEET, AND PRESSING DEVICE

• Main Authors: TOMITA MIHO, TOMITA YUKI, IMOTO YASUSHI, MATSUNAGA KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2020
• Subjects: BROACHING; FILING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PLANING; PUNCHING METAL; ROLLING OF METAL; SAWING; SCRAPING; SHEARING; SLOTTING; TRANSPORTING

To provide a method for producing a cold rolled steel sheet in which edge cracking occurrence is efficiently restrained, and to provide a pressing device for restraining the edge cracking occurrence on the steel sheet.SOLUTION: A production method for a cold rolled steel sheet comprises: a hot rolling process of obtaining a hot rolled steel sheet from a slab by hot rolling; a trimming process of cutting both ends of the hot rolled steel sheet in a width direction; a pressing process of pressing by a pair of pressing members, a pair of cutting planes which are formed on both ends of the hot rolled steel sheet by both ends cutting in the trimming process toward inside from outside in the width direction; and a cold rolling process of obtaining the cold rolled steel sheet by cold-rolling the hot rolled steel sheet in which the pair of cutting planes are pressed in the pressing process.SELECTED DRAWING: Figure 1 【課題】耳割れの発生が十分に抑制された冷延鋼板の製造方法および冷延鋼板に耳割れが発生することを抑制するための押圧装置を提供する。【解決手段】スラブから熱間圧延によって熱延鋼板を得る熱間圧延工程と、前記熱延鋼板の幅方向両端部を切断するトリミング工程と、前記トリミング工程において前記両端部が切断されることによって前記熱延鋼板の両端部に形成された一対の切断面を、前記幅方向における外側から内側に向かって一対の押圧部材によって押圧する押圧工程と、前記押圧工程において前記一対の切断面が押圧された前記熱延鋼板を冷間圧延することによって冷延鋼板を得る冷間圧延工程とを有する。【選択図】 図１