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1.发明申请SURFACE LAYER GRAIN REFINING HOT-SHEARING METHOD AND WORKPIECE OBTAINED BY SURFACE LAYER GRAIN REFINING HOT-SHEARING 审中-公开表面层磨粒热切割方法和由表面层磨粒热切割获得的工件公开(公告)号：US20160067760A1
公开(公告)日：2016-03-10
申请号：US14888434
申请日：2013-05-09
CPC分类号： B21D37/16 , B21D28/00 , B21D28/24 , C21D1/18 , C21D1/673 , C21D9/00 , C21D9/46 , C21D2211/005 , C21D2211/008 , C21D2221/10 , C22C38/00 , C22C38/18
摘要： Provided is a surface layer grain refining hot-shearing method including: heating and keeping a steel sheet in a temperature range of from Ac3 to 1400° C. to austenitize the steel sheet; subsequently shearing the steel sheet in a state in which the steel sheet is placed on a die; and quenching by rapidly cooling the sheared steel sheet, wherein a start temperature of the shearing is set to be a temperature (° C.) obtained by adding a temperature of from 30° C. to 140° C. to a previously measured Ar3 of the steel sheet.
摘要翻译： 提供一种表面层晶粒细化热剪切方法，其包括：将钢板在Ac 3〜1400℃的温度范围内加热保持，使钢板奥氏体化; 随后在将钢板放置在模具上的状态下剪切钢板; 并通过快速冷却剪切钢板进行淬火，其中剪切的开始温度设定为通过将30℃至140℃的温度加入到先前测量的Ar 3的温度（℃） 钢板。
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公开(公告)号：US20170080475A1
公开(公告)日：2017-03-23
申请号：US15309142
申请日：2015-05-07
发明人： Takashi MATSUNO , Koichi SATO , Takashi YASUTOMI
摘要： In a manufacturing method of sheared components, the shearing including a process of fixing a workpiece to a die, and a process of punching the workpiece by bringing a punch and the die relatively close to each other, is performed a plurality of times, and when a shearing sequence is started, the shearing is performed by using a punch including a first cutting edge having a first tip end surface which opposes the workpiece, and a first retracting surface which retracts from the first tip end surface considering an approaching direction to the die as a standard; and a die including a second cutting edge having a second tip end surface which opposes the workpiece, and a second retracting surface which retracts from the second tip end surface considering an approaching direction to the punch as a standard.
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公开(公告)号：US20180333760A1
公开(公告)日：2018-11-22
申请号：US15552552
申请日：2016-02-25
摘要： Provided is a steel material shearing method that enables highly productive and low-cost production of a steel material with a sheared surface having excellent hydrogen embrittlement resistance, fatigue strength, and stretch flangeability. The shearing method comprises making a clearance between a die and a punch 5 to 80% of a sheet thickness of a workpiece, shearing the workpiece using the punch, and, by utilizing a punched material punched out by the punch, pressing an end face of the punched out material against the sheared surface of the worked material on the die to produce a steel sheet with a sheared edge having excellent hydrogen embrittlement resistance and fatigue strength.
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公开(公告)号：US20180272408A1
公开(公告)日：2018-09-27
申请号：US15762824
申请日：2016-09-28
发明人： Takashi YASUTOMI , Takashi MATSUNO , Tohru YOSHIDA
CPC分类号： B21D28/34 , B21D22/02 , B21D24/16 , B21D28/16 , B21D35/006 , B23D15/08 , B23D35/001 , B23K31/00
摘要： A cutting method using a stamping press according to the present disclosure is a method to cut a workpiece that is configured from a first metal sheet and a second metal sheet joined at a weld portion and that has a heat-affected zone around the weld portion, in which the workpiece is cut using a punch. The punch includes a flat portion and a projecting portion projected more toward the workpiece than a flat portion of the punch. The workpiece is positioned with respect to the punch at a position such that the projecting portion starts cutting at least at one out of the heat-affected zone or the weld portion before the flat portion cuts the workpiece. The workpiece is then cut by moving the punch and a die relative to each other in this state of positioning so as to shear across the weld portion on the workpiece.
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公开(公告)号：US20170320122A1
公开(公告)日：2017-11-09
申请号：US15533737
申请日：2014-12-10
发明人： Takashi MATSUNO , Akira EGAMI
摘要： A sheet-shaped blank (10) for press forming is produced by shearing a metal sheet (30). The blank (10) includes a sheared edge (14), which includes a sheared surface (14b) and a fractured surface (14c) in the sheet thickness direction and has a loop shape in plan view. In plan view, an edge of the sheared edge (14) includes concavely curved portions (20). The average of lengths of the fractured surface (14c) in the sheet thickness direction in the curved portions (20) is greater than the average of lengths of the fractured surface (14c) in the sheet thickness direction over the entire perimeter of the sheared edge (14).
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