Method of resistance spot welding and resistance spot welding apparatus

    公开(公告)号:US11883898B2

    公开(公告)日:2024-01-30

    申请号:US17475821

    申请日:2021-09-15

    发明人: Keigo Yasuda

    摘要: A method of resistance spot welding that enables an improvement of a weld strength of steel plates having different plate thicknesses while inhibiting generation of spatters is provided. One aspect of the present disclosure is the method of resistance spot welding, the method including welding a workpiece made of layered steel plates with a resistance spot welding apparatus. The resistance spot welding apparatus includes a first electrode configured to contact a first steel plate among the steel plates, and a second electrode configured to contact, among the steel plates, a second steel plate that is thinner than the first steel plate, and the second electrode being arranged such that the workpiece is interposed between the first electrode and the second electrode. The welding includes welding while moving the second electrode relative to the first electrode in a direction parallel with a plate surface of the second steel plate.

    RESISTANCE SPOT WELDING METHOD AND METHOD FOR MANUFACTURING RESISTANCE SPOT WELDED JOINT

    公开(公告)号:US20230339037A1

    公开(公告)日:2023-10-26

    申请号:US17908799

    申请日:2021-03-01

    IPC分类号: B23K11/11

    CPC分类号: B23K11/115 B23K2101/18

    摘要: Provided are a resistance spot welding method and a method for manufacturing a resistance spot welded joint. At least one of the steel sheets used is a high strength steel sheet. The method includes a main current application step in which current is applied with a current Iw and a tempering post-heat treatment step. The tempering post-heat treatment step includes a cooling process and a heating process and can include at least one of a transition process and a holding process. In the heating process, a current is applied at a current value It, shown in formula (2), for a current application time tt.


    0.8×Iw≤It≤1.6×Iw   (2)

    Laser machining apparatus and laser machining method

    公开(公告)号:US11780032B2

    公开(公告)日:2023-10-10

    申请号:US17263332

    申请日:2019-07-05

    申请人: Amada Co., Ltd.

    摘要: A control device controls a beam vibrating mechanism to vibrate a laser beam in a C-shaped vibration pattern in which a beam spot is moved from a first irradiation position at a front end in a cutting advancing direction to a second irradiation position at a rear side and displaced in an orthogonal direction to the cutting advancing direction, and is moved from the second irradiation position to a third irradiation position at a front end and displaced in the orthogonal direction to the cutting advancing direction, and movement from the first irradiation position to the third irradiation position via the second irradiation position, and movement from the third irradiation position to the first irradiation position via the second irradiation position are repeated. The control device performs control to cut the sheet metal by causing beam spots in the first to third irradiation positions to overlap one another.