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    Welding method
    1.
    发明专利
    Welding method 有权

    公开(公告)号：JP5019041B2

    公开(公告)日：2012-09-05

    申请号：JP2007129523

    申请日：2007-05-15

    Applicant: トヨタ自動車株式会社

    Inventor： 秀樹 手嶋

    IPC: B23K26/20 ,  B23K26/34

    Abstract: PROBLEM TO BE SOLVED: To properly weld base materials each other by surely melting filler metal by emitting a laser beam and supplying it to a portion to be welded by simple constitution. SOLUTION: This method is a method for welding the base materials M1, M2 each other by emitting a high-energy beam B onto the portion W to be welded of the base materials M1, M2 and also supplying the filler metal F to the portion W to be welded after melting it by the high-energy beam B and, by arranging the filler metal F which is formed into a platy shape by securing a prescribed interval X above the portion W to be welded, making the filler metal F melt down by emitting the high-energy beam B to this platy filler metal F and emitting the high-energy beam B to the portion W to be welded through the platy filler metal F, the portion W to be welded is welded and also the droplets f of the filler metal F which is molten down are filled in the portion W to be welded. COPYRIGHT: (C)2009,JPO&INPIT

    Laser welding method and laser welding equipment
    3.
    发明专利
    Laser welding method and laser welding equipment 有权

    公开(公告)号：JP4687243B2

    公开(公告)日：2011-05-25

    申请号：JP2005153779

    申请日：2005-05-26

    Applicant: トヨタ自動車株式会社

    Inventor： 博成 三方 ,  和久 三瓶 ,  彰生 佐藤 ,  秀樹 手嶋 ,  剛司 池田

    IPC: B23K26/20 ,  B23K26/06 ,  B23K26/067 ,  H01S3/00

    Abstract: PROBLEM TO BE SOLVED: To solve the problem of a defect in blow holes generated by the ionization of nitrogen in the air even in the case remote welding is performed using a laser beam having a long focus. SOLUTION: A laser beam 7 introduced from a laser oscillator 3 is emitted to the surface of the part to be welded by a scanning means 5. In this case, the laser beam 7 is branched into the first branched beam 8 and the second branched beam 9, and further, the first branched beam 8 and the second branched beam 9 are condensed on the same emitting position, and are emitted. As the penetration quantity required for welding is secured, the energy density of the laser beam passing through the atmosphere in the upper part of a molten pond 13 is reduced, so as to suppress the electrolytic dissociation of nitrogen. COPYRIGHT: (C)2007,JPO&INPIT

    Evaluation method of welding quality, welding process, welding quality evaluation apparatus, and weld quality evaluation element
    5.
    发明专利
    Evaluation method of welding quality, welding process, welding quality evaluation apparatus, and weld quality evaluation element 有权

    公开(公告)号：JP5115728B2

    公开(公告)日：2013-01-09

    申请号：JP2008155353

    申请日：2008-06-13

    Applicant: トヨタ自動車株式会社

    Inventor： 憲嗣 長縄 ,  義範 柴田 ,  秀樹 手嶋

    IPC: B23K31/00 ,  B23K26/00 ,  B23K26/20

    Abstract: PROBLEM TO BE SOLVED: To easily and correctly evaluate the welding quality at low cost. SOLUTION: A welding quality evaluation device 1 includes a welding quality evaluating element g to be installed at a predetermined position on a surface of a member W2 to be welded, a CCD camera K as a detection means for detecting the welding quality evaluating element g, and an evaluation means PC which determines the softening or the melting of the element by recognizing the welding quality evaluating element g detected by the CCD camera K, and evaluates the welding quality based on the result of determination. The welding quality evaluating element g is formed of a low melting point material which is softened or melted at the predetermined temperature lower than the melting point of the members W1, W2 to be welded, and constituted so that its appearance is changed when the temperature reaches the predetermined value. The element is installed on the surface of the member W2 at least one of the position of a part M at which the temperature is raised to the value for changing the appearance when the normal welding is executed and the position at which the temperature is maintained at the value for not changing the appearance. COPYRIGHT: (C)2010,JPO&INPIT

    Superimposed laser welding method
    8.
    发明专利
    Superimposed laser welding method 有权

    公开(公告)号：JP4378635B2

    公开(公告)日：2009-12-09

    申请号：JP2005049748

    申请日：2005-02-24

    Applicant: トヨタ自動車株式会社

    Inventor： 秀樹 手嶋

    IPC: B23K26/20 ,  B23K103/04

    Abstract: PROBLEM TO BE SOLVED: To facilitate laser welding while improving a welding quality by reducing an inter-flange gap for the flange part as a part to be welded and formed integrally with a formed part even if the formed part has a complicated shape. SOLUTION: Three steel plates 10, 20, 30 are superposed having a first to third formed parts 11, 21, 31 and a first to third flange parts 12, 22, 32. In this case, in order for the first and second convex faces 13, 23 of the first and second curved parts 14, 24 provided in the first and second flange parts 12, 22 to become a face overlapped with the third flange part, the first and second convex faces 13, 23 are turned inward. By tack-welding the temporary welding spots as both load bearing points situated near both ends of the first curved part 14, and for the purpose of making the first and second convex faces 13, 23 to be a flat face, the first and second curved parts 14, 24 are deformed, and then, while the loaded state is maintained in which the overlapped faces are respectively pressurized, the flange parts are laser-welded. COPYRIGHT: (C)2006,JPO&NCIPI

    Butt laser welding method and butt laser welding equipment
    9.
    发明专利
    Butt laser welding method and butt laser welding equipment 有权

    公开(公告)号：JP4378634B2

    公开(公告)日：2009-12-09

    申请号：JP2005044595

    申请日：2005-02-21

    Applicant: トヨタ自動車株式会社

    Inventor： 博成 三方 ,  和久 三瓶 ,  彰生 佐藤 ,  秀樹 手嶋 ,  剛司 池田

    IPC: B23K26/20 ,  B23K26/073 ,  B23K26/08

    Abstract: PROBLEM TO BE SOLVED: To provide a butt laser beam welding method, and a butt laser beam welding equipment capable of obtaining an excellent welded condition by allowing both end faces to form a large space therebetween to be directly irradiated with laser beams while suppressing degradation of the power density of the laser beams on a surface of irradiation even when a large space is present between both the end faces to be butted to each other. SOLUTION: The space set value s is preset according to the size of a space to be formed between both the end faces 1a, 2a when the end faces 1a, 2a of a member to be welded are butted to each other. Elliptical beams 12 in which the major axis length a and the major axis direction of an elliptical section on the surface of irradiation are adjusted so that the beams are condensed on the elliptical section by the surface of irradiation on a butt line 3, the value of the major axis length a of the elliptical section is larger than the space set value s, and a range of irradiation reaches both the end faces 1a, 2a to form a space of the space set value s are scanned along the butt line 3. By directly irradiating both the end faces 1a, 2a with the elliptical beams 12 and reliably melting the end faces, the end faces 1a, 2a are integrally welded in an excellent welded condition. COPYRIGHT: (C)2006,JPO&NCIPI

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