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    Laser welding method and laser welding equipment
    21.
    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

    Laser processing method and laser processed products
    24.
    发明专利
    Laser processing method and laser processed products 有权

    公开(公告)号：JP4004215B2

    公开(公告)日：2007-11-07

    申请号：JP2000255506

    申请日：2000-08-25

    Applicant: トヨタ自動車株式会社

    Inventor： 和久 三瓶 ,  彰生 佐藤

    IPC: B23K26/06 ,  F01L3/24 ,  B23K26/073 ,  B23K26/08 ,  F02F1/24 ,  H01S3/00

    Abstract: PROBLEM TO BE SOLVED: To reduce working hours by drastically changing the irradiation shape and the scanning direction of a laser beam onto a work piece, further stabilize and enhance the work quality by removing the work overlap. SOLUTION: A stack block 11 having a built-in laser diode array is moved in the radial direction to expand and reduce the diameter of an approximately cylindrical beam 16. A circular groove 1a, which is in the machining longitudinal direction of a valve sheet part 1, is scanned in the radial direction, which is in the machining traverse direction, at the predetermined speed with an approximately circular beam 17 formed upon the irradiation. Then padding powder 4 supplied throughout a whole periphery of the circular groove 1a in advance is annularly welded to each other in sequence.

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