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公开(公告)号：US20160250709A1
公开(公告)日：2016-09-01
申请号：US14916269
申请日：2014-08-27
Applicant: JFE STEEL CORPORATION
Inventor： Muneo Matsushita , Rinsei Ikeda
CPC classification number: B23K11/115 , B23K11/16 , B23K11/24 , B23K11/255 , B23K11/314 , B23K11/315 , B23K2101/006 , B23K2101/18 , B23K2103/04
Abstract: In the indirect spot welding apparatus, a lower limit in a stable pressing force region where the pressing force of the spot welding electrode against the metal sheets can be controlled within a tolerance of ±10% ranges from 70 N to 200 N and an upper limit in the stable pressing force region ranges from 800 N to 2000 N, and an overshoot OS(%)=(PL−AL)/AL×100 of the pressing force occurring when the spot welding electrode is pressed against the metal sheets is controlled to be 10% or less.
Abstract translation: 在间接点焊装置中，可以将点焊电极对金属板的按压力控制在±10％的公差范围内的稳定的按压力区域的下限范围为70N〜200N，上限 在稳定的按压力范围为800N〜2000N的范围内，并且当点焊电极压在金属片上时产生的按压力的过冲OS（％）=（PL-AL）/ AL×100被控制为 为10％以下。
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32.发明申请公开(公告)号：US20160228981A1
公开(公告)日：2016-08-11
申请号：US15025585
申请日：2014-09-10
Applicant: JFE STEEL CORPORATION
Inventor： Muneo Matsushita , Koichi Taniguchi , Rinsei Ikeda
IPC: B23K20/12
CPC classification number: B23K20/1235 , B23K20/129
Abstract: A process of pre-heating treatment is performed such that steel sheets or plates as working materials are heated by a heating unit provided ahead of a rotational tool moving in a welding direction to precisely control the surface temperature, area, position and the like of a heating region in the process of pre-heating treatment when performing friction stir welding on structural steel.
Abstract translation: 进行预热处理的过程，使得作为工作材料的钢板或板被加热单元加热，该加热单元设置在沿着焊接方向移动的旋转工具的前方，以精确控制表面温度，面积，位置等 在结构钢上进行摩擦搅拌焊接时，预热处理过程中的加热区域。
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33.发明申请公开(公告)号：US20160214203A1
公开(公告)日：2016-07-28
申请号：US15025667
申请日：2014-09-29
Applicant: JFE STEEL CORPORATION
Inventor： Koichi Taniguchi , Muneo Matsushita , Rinsei Ikeda
CPC classification number: B23K20/122 , B23K20/1235 , B23K20/22 , B23K20/227 , B23K20/24 , B23K20/26 , B23K31/02 , B23K2101/18 , B23K2103/04 , B23K2103/05 , C21D1/42 , C21D9/50 , Y02P10/253
Abstract: A friction stir welding method for steel sheets includes inserting a rotating tool into an unwelded portion where two or more steel sheets are overlapped or butted together; moving the rotating tool along portions to be welded while rotating the tool so that a softened portion is formed in the steel sheets by friction heat generated between the rotating tool and the steel sheets, and the steel sheets are welded together by utilizing a plastic flow generated by the softened portion being stirred; and preheating the unwelded portion before welding by the rotating tool by a pair of heating devices disposed over and under the unwelded portion and ahead of the rotating tool in the advancing direction to enable high speed welding without the risk of generation of welding defects and damage to the welding tool.
Abstract translation: 用于钢板的摩擦搅拌焊接方法包括将旋转工具插入到两个或更多个钢板重叠或对接在一起的未焊接部分中; 在旋转工具的同时沿着被焊接部移动旋转工具，使得通过在旋转工具和钢板之间产生的摩擦热而在钢板中形成软化部分，并且通过利用产生的塑性流将钢板焊接在一起 被软化部分搅拌; 并且在通过旋转工具进行焊接之前，通过设置在未焊接部分的上方和下方并且在前进方向前方的旋转工具之前的一对加热装置预热未焊接部分，以实现高速焊接，而不会产生焊接缺陷和损坏的风险 焊接工具。
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公开(公告)号：US12134153B2
公开(公告)日：2024-11-05
申请号：US16311268
申请日：2017-06-19
Applicant: Kobe Steel, Ltd. , JFE Steel Corporation
Inventor： Minoru Miyata , Reiichi Suzuki , Hiroshi Matsuda , Rinsei Ikeda , Sachiko Suzuki , Satoru Ando
Abstract: A gas-shielded arc welding method includes welding a steel plate having a tensile strength of 780 MPa or more while feeding a consumable electrode via a welding torch and flowing a shielding gas. The consumable electrode includes, in mass %, C: 0 to 0.20%, Si: 0 to 0.50%, Mn: 0 to 0.50%, Cr: 1.00% to 9.00%, S: 0.0020% to 0.0600%, and Ni: 0 to 0.50%. The shielding gas includes, in vol. %, at least one of CO2 and O2: 1% to 15% in total, with the remainder being Ar and unavoidable impurities. Welding is performed under the condition satisfying the relationship of 1≤{−0.05×[CO2+O2]}+[Cr]≤8.3, and [Cr] represents the content of Cr in the consumable electrode, and [CO2+O2] represents a total content of at least one of CO2 and O2 in the shielding gas.
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公开(公告)号：US11504796B2
公开(公告)日：2022-11-22
申请号：US15024164
申请日：2014-09-12
Applicant: JFE STEEL CORPORATION
Inventor： Chikaumi Sawanishi , Yasuaki Okita , Rinsei Ikeda
IPC: B23K11/24 , B23K11/25 , B23K11/11 , B23K11/16 , B23K101/34 , B23K101/18 , B23K103/04
Abstract: Proposed is a resistance spot welding method to join parts to be welded which are a plurality of overlapping metal sheets, including: dividing a current pattern into two or more steps for welding; before actual welding, performing test welding; and subsequently, as actual welding, performing adaptive control welding, in which the two or more steps for welding include a step of securing a current path between the sheets directly below the electrodes and a subsequent step of forming a nugget having a predetermined diameter, and a welding interval time is provided between these steps. This method thus yields a good nugget without causing splashing even under special welding conditions.
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Patent Agency Ranking
36.发明授权公开(公告)号：US11446757B2
公开(公告)日：2022-09-20
申请号：US16637906
申请日：2018-09-12
Applicant: JFE STEEL CORPORATION
Inventor： Muneo Matsushita , Rinsei Ikeda
Abstract: There is provided a friction stir welding method in which, when double-sided friction stir welding is performed, enough plastic flow to obtain a welded state uniform in the thickness direction of metal sheets can be obtained, in which an increase in welding speed is achieved while the occurrence of defects during welding is prevented, and in which sufficient strength and improvement in welding workability can be achieved. There is also provided a friction stir welding device suitable for the friction stir welding.
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公开(公告)号：US11241755B2
公开(公告)日：2022-02-08
申请号：US16089217
申请日：2017-03-22
Applicant: JFE Steel Corporation
Inventor： Muneo Matsushita , Rinsei Ikeda , Koichi Taniguchi
IPC: B23K20/12 , B23K20/24 , B23K101/18 , B23K103/04
Abstract: An object is to provide a friction stir welding method and apparatus that provide sufficient strength and good welding workability by advantageously eliminating plastic flow deficiency generated as a result of insufficient heating of workpieces.
In friction stir welding for steel sheets (3,3) as workpieces, a pair of facing rotary tools (1,15) are inserted into a non-welded part from both one surface side and the other surface side of the steel sheets (3,3), the rotary tools move in a welding direction while rotating, and in addition, a preheating process for heating steel sheets (3,3) is performed by heating means (5) provided in front of the rotary tools (1,15). The configuration of the pair of facing rotary tools (1,15) and the surface temperature, area, position, and so forth of a heated region in the preheating process are strictly controlled.-
公开(公告)号：US11136643B2
公开(公告)日：2021-10-05
申请号：US16320864
申请日：2017-08-10
Applicant: JFE STEEL CORPORATION
Inventor： Katsutoshi Takashima , Koichi Taniguchi , Takashi Kobayashi , Hiroshi Matsuda , Rinsei Ikeda
IPC: C21D9/46 , C21D8/02 , C22C38/38 , C22C38/12 , C22C38/08 , C22C38/22 , C22C38/00 , C22C38/26 , C22C38/24 , C22C38/28 , C22C38/14 , C22C38/32 , C22C38/06 , C22C38/04 , C22C38/02 , C23C2/02 , C23C2/06 , C23C2/28 , C21D6/00 , C21D1/30 , C22C38/20 , C22C38/58
Abstract: A high-strength steel sheet having a specified chemical composition and a method for producing the same. The steel sheet including a multi-phase structure including, by volume fraction, ferrite of 35% to 65%, residual austenite of 7% or less (including 0%), martensite of 20% to 60%, bainite of 20% or less (including 0%), the ferrite having an average crystal grain size of 8 μm or less and an average aspect ratio of 3.5 or less, the martensite having an average crystal grain size of 3 μm or less, and the bainite having an average crystal grain size of 3 μm or less when contained. A standard deviation of Vickers hardness of the steel sheet being 30 or less when measured at 200 μm intervals from a position of 100 μm from a surface to a central portion in a thickness direction of the sheet.
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39.发明申请公开(公告)号：US20210260685A1
公开(公告)日：2021-08-26
申请号：US17319134
申请日：2021-05-13
Applicant: JFE Steel Corporation
Inventor： Hiroshi Matsuda , Yasuaki Okita , Muneo Matsushita , Rinsei Ikeda , Kenji Oi
IPC: B23K11/16 , B23K11/11 , C22C38/60 , B23K11/34 , C22C38/00 , B32B15/04 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18
Abstract: A welding process used in a method of manufacturing a steel sheet assembly includes spot welding steel sheets performed for a heat time of 0.08 seconds or more using a convex electrode with a tip radius of curvature of 20 mm or more or a flat electrode such that the weld force F (kN) for initial 0.03 seconds of the heat time satisfies formula: F
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公开(公告)号：US20190111514A1
公开(公告)日：2019-04-18
申请号：US16089110
申请日：2017-03-22
Applicant: JFE Steel Corporation
Inventor： Muneo Matsushita , Rinsei Ikeda , Koichi Taniguchi
Abstract: An object is to provide a friction stir welding method and apparatus that provide sufficient strength and good welding workability by advantageously eliminating plastic flow deficiency generated as a result of insufficient heating of workpieces.In friction stir welding for steel sheets (3, 3) as workpieces, a pair of facing rotary tools (1, 15) are inserted into a non-welded part from both one surface side and the other surface side of the steel sheets (3, 3), the rotary tools move in a welding direction while rotating, and in addition, a preheating process for heating steel sheets (3, 3) is performed by heating means (5) provided in front of the rotary tools(1, 15). The configuration of the pair of facing rotary tools (1, 15) and the surface temperature, area, position, and so forth of a heated region in the preheating process are strictly controlled.
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