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公开(公告)号：US20240238862A1
公开(公告)日：2024-07-18
申请号：US18422091
申请日：2024-01-25
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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2.发明公开公开(公告)号：US20230264248A1
公开(公告)日：2023-08-24
申请号：US18010126
申请日：2021-06-08
摘要： A shearing work technology of metal sheets, such as high-strength steel sheets, is excellent in stretch flange crack resistance and delayed fracture resistance of the sheared end surface. A metal sheet shearing work method including: applying double shearing work to an end portion of at least one part of the metal sheet; and forming a first area having a cutting margin of a second shearing work of 5 mm or less in first cutting in the double shearing work. Second cutting in the double shearing work is carried out in a state where the movement on an end portion side of the first area is restrained. For example, by providing projection areas continuous to the first area and restraining the projection areas, the movement on the end portion side of the first area is restrained.
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3.发明授权公开(公告)号：US11524327B2
公开(公告)日：2022-12-13
申请号：US16997322
申请日：2020-08-19
发明人： Takashi Maruyama
摘要： A device for manufacturing a laminated iron core includes: a punch unit configured to form protrusions, and including N number of punches as a set, the N being a natural number larger than M; and N number of auxiliary punches. The N number of auxiliary punches are configured such that L number of auxiliary punches selected from the N number of auxiliary punches performs a nullification processing on a metal sheet, the nullification processing being configured to nullify a processing with the L number of punches among the N number of punches, the L being the natural number that is obtained by subtracting the M from the N. According to the above configurations, for example, since a processing position with the plurality of punches is limited in one position, a positional accuracy of protrusions formed in punched members with the plurality of punches is improved.
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公开(公告)号：US11484931B2
公开(公告)日：2022-11-01
申请号：US16452994
申请日：2019-06-26
发明人： Jose Lozano Bonet
摘要： A fine blanking press comprises a blanking ram and a counter unit positioned opposite the blanking ram. A press drive is configured to drive at least the blanking ram along a driving direction during a fine blanking process step. A feeding device is configured to feed a process material to a process zone defined between the blanking ram and the counter unit and at least one handling device is configured to handle the process material outside of the process zone. At least one levelling drive is configured to drive the at least one handling device in a same direction as the blanking ram during a fine blanking process step.
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公开(公告)号：US11224909B2
公开(公告)日：2022-01-18
申请号：US15742742
申请日：2016-06-29
IPC分类号： B21D28/34 , B21D22/02 , B21J5/02 , B21K23/00 , B21D53/28 , B21D28/16 , B21K1/30 , B21D28/26 , B21D37/12
摘要： Provided are a protrusion forming device, a protrusion forming method, and a formed article, with which a height equal to or greater than the plate thickness is possible, the edges are sharp, and cracking can be prevented. This protrusion forming device is characterized by being equipped with a die unit provided with a die hole, and a punch unit having a large punch part with a size such that this part cannot be inserted into the die hole, and a small punch part that protrudes from the large punch part toward the die unit and can be inserted into the die hole, and characterized in that the workpiece is deformed by pressing a portion of the workpiece arranged between the die unit and the punch unit toward the die unit by means of the punch unit, thereby forming a protrusion.
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6.发明申请公开(公告)号：US20210316354A1
公开(公告)日：2021-10-14
申请号：US16988704
申请日：2020-08-09
申请人： Southwest Technology and Engineering Research Institute , Harbin Institute of Technology at Weihai
发明人： Qiang CHEN , Gang CHEN , Xusheng CHANG , Hongming ZHANG , Dayu SHU , Hong ZHAN , Lin XIANG , Yunliang XIANG , Yan TANG
摘要： A fine blanking device and method for forming a friction plate with friction material layers. The fine blanking device includes an upper die, a lower die, a guide mechanism, a punch and a counter punch. Upper and lower blank holders are respectively provided at outer circumferences of the punch and the counter punch. The upper and lower blank holders are respectively provided with a buffer mechanism. Friction material powders are sintered on both sides of the base sheet. The friction material layers are trimmed and planished by hot pressing. The base sheet with the friction material layers is fixed by the upper blank holder and the lower blank holder. A tooth profile with an absolute shear fractural surface is formed. The fixing indentation of the V-shaped structure of the friction material layers is cut off for obtaining a finished friction plate product with the friction material layers.
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公开(公告)号：US11059087B2
公开(公告)日：2021-07-13
申请号：US15993049
申请日：2018-05-30
发明人： Sven Hofstetter , Herbert Fuchs , Jonatan Gersbach
摘要： A stamped or fine-blanked, workpiece is inserted in an embossing device, and the burr created on the workpiece during stamping or fine blanking is rounded by way of a die of the embossing device and the height of the rollover created during stamping or fine blanking is decreased using the same stroke of the embossing device by way of which the burr rounding is carried out.
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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：US10058907B2
公开(公告)日：2018-08-28
申请号：US15142666
申请日：2016-04-29
发明人： Marc Klinkhammer , Markus Wilhelm , Takeshi Abiko
摘要： A forming tool for pressure forming a connecting web between incompletely separated workpiece parts of a plate-like workpiece from a cutting operation, in particular a metal sheet, comprises two tool parts, of which each is provided with a forming unit. The tool parts are able to move towards each other along a stroke axis with a processing stroke to a stroke end position. Each of the forming units has a forming surface on a web side facing away from the respective workpiece part, wherein the said forming surface, starting from a front face of the forming unit extends along the stroke axis away from a workpiece side facing the respective workpiece part.
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10.发明申请公开(公告)号：US20180036785A1
公开(公告)日：2018-02-08
申请号：US15555593
申请日：2016-02-22
发明人： Kazutaka Masai , Hironori Imamura
CPC分类号： B21D28/16 , B21D19/005 , B21D28/26 , B21D28/265
摘要： The punching processing method of the present invention is a punching processing method in which a metallic sheet material 1a is sequentially subjected to multiple punching processing steps by a punch and a die, comprising, in first step punching processing, forming a first step punched surface 2 on the sheet material 1a, and then in second step punching processing, forming a second step punched surface 3 on the sheet material 1a by punching the sheet material 1a such that the second step punched surface 3 and the first step punched surface 2 are crossed with each other, thereby forming matching portions 5 at positions where the first step punched surface 2 and the second step punched surface 3 intersect, wherein after the first step punching processing and before the second step punching process, the method further comprises subjecting the sheet material 1a to swaging processing that sandwiches and crushes matching portion forming portions 5a of the sheet material 1a, which will form the matching portions 5, from a top surface TS side and a back surface BS side of the sheet material 1a.
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