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    Rod-type solid-state laser device
    5.
    发明专利
    Rod-type solid-state laser device 有权

    公开(公告)号：JP4170890B2

    公开(公告)日：2008-10-22

    申请号：JP2003407010

    申请日：2003-12-05

    Applicant: トヨタ自動車株式会社 ,  三菱電機株式会社

    Inventor： 博成 三方 ,  和久 三瓶 ,  一樹 久場 ,  彰生 佐藤 ,  俊昭 渡辺 ,  周一 藤川

    IPC: B23K26/00 ,  H01S3/10 ,  B23K26/06 ,  H01S3/00

    Abstract: PROBLEM TO BE SOLVED: To obtain a rod type solid laser device wherein the rate of its laser output beam guided to an optical fiber can be kept constant even when the thermal lens of its rod type solid laser medium is varied. SOLUTION: In the rod type solid laser device, a laser beam 5 is generated from a rod type solid laser medium 1 by using an optical resonator comprising a total reflecting mirror 3 and a partial reflecting mirror 4, focused by using a coupling lens 7, and guided to an optical fiber 9. The aperture diameter of an aperture 8 which restricts the diameter of the incident beam to the coupling lens 7 is made variable, and a controlling means 12 for controlling the aperture diameter is provided. COPYRIGHT: (C)2005,JPO&NCIPI

    Laser processing systems and laser processing method
    8.
    发明专利
    Laser processing systems and laser processing method 有权

    公开(公告)号：JP4141485B2

    公开(公告)日：2008-08-27

    申请号：JP2006196862

    申请日：2006-07-19

    Applicant: トヨタ自動車株式会社 ,  株式会社 レーザックス

    Inventor： 彰生 佐藤 ,  昭彦 坪井 ,  裕之 鈴木

    IPC: B23K26/04 ,  B23K26/00 ,  B23K26/08 ,  H01S3/00

    CPC classification number: B23K26/04

    Abstract: A laser processing system and a laser processing method that can highly accurately and efficiently specify a focus position of a processing laser using visible lasers are provided. For that purpose, a laser processing system (100) includes a processing laser oscillator (1), a condensing optical system (3) including a condenser lens (32), two visible laser oscillators (51) and (52), a movement adjusting unit that adjusts the condenser lens (32) and the visible laser oscillators (51) and (52) to move forward and backward in synchronization with each other, an imaging unit that images spot lights of the visible lasers on a workpiece (W), an image processing unit that subjects an imaged video to image processing and displays an image after the processing, a calculating unit that calculates, in a state in which the respective visible lasers are focused on a focus position of the processing laser, center of gravity positions of spot lights of the respective visible lasers formed on the surface of the workpiece (W) according to the movement of the condenser lens (32) and calculates a distance between centers of gravity, and a control unit that controls the movement adjusting unit such that the distance between centers of gravity is adjusted to zero or substantially zero.

    Butt laser welding method and butt laser welding equipment
    10.
    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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