• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUMMARY OF THE INVENTION An object of the present invention is to provide a laser beam welding head capable of significantly shortening the welding time and maintaining high welding strength by allowing the laser beam to be irradiated precisely along the edge of the circular welding spot. In order to achieve the above object, the present invention is a condenser lens for concentrating the laser beam to be irradiated in one place, a rotating cylinder having an inclined surface for supporting the condensing lens inclined, a support cylinder for guiding the rotation of the rotating cylinder, And a gear mounted in the lower portion of the rotating cylinder and having a hole in the center to allow passage of the laser beam, a pinion for decelerating the gear, and a servo motor mounted to the support cylinder to drive the pinion. It features.
    公开号:KR19980056754A
    申请号:KR1019960076024
    申请日:1996-12-30
    公开日:1998-09-25
    发明作者:손경락
    申请人:박병재；현대자동차 주식회사；
    IPC主号:
    专利说明:

    Laser beam welding head
    The present invention relates to a laser beam welding head.
    Conventionally, spot resistance welding has been performed by welding for assembling vehicle body parts, but recently, laser beam welding having good welding quality has been performed.
    Laser beam welding is focused on irradiating strong light with very short wavelength and melting and joining the member by the heat.The laser beam welding focuses the laser beam to be focused on one point of the member to move the focus along the edge of the welding point. We do welding.
    The technique of welding using the above method is disclosed in Japanese Patent Laid-Open No. 5-50277.
    The Japanese Laid-Open Patent discloses a welding point of the welding member 22 by collecting the laser beam 20 irradiated from the laser beam irradiator and collecting the focal point C in one place using the condenser lens 21 as shown in FIG. Intensive irradiation is performed to form beads 23 (circular welding spots).
    However, the linear patent uses a lens 21 fixing jig 24, a motor 25, a rack 26, and a pinion 27 as a means of shifting the focus along the boundary of the bead 23. It is difficult to precisely move along the edge of the circular welding point (bead part), which not only complicates the driving device of the welding head, but also makes it difficult to form an accurate welding point, thereby naturally lowering welding speed and welding strength. It is becoming.
    Accordingly, the present invention has been proposed in view of the above-mentioned problems, and its object is to allow a laser beam to be precisely focused along the edge of a circular welding spot, thereby significantly reducing the welding time and maintaining a high welding strength. To provide a welding head.
    In order to achieve the above object, the present invention is a condenser lens for concentrating the laser beam to be irradiated in one place, a rotating cylinder having an inclined surface for supporting the condensing lens inclined, a support cylinder for guiding the rotation of the rotating cylinder, And a gear mounted in the lower portion of the rotating cylinder and having a hole in the center to allow passage of the laser beam, a pinion for decelerating the gear, and a servo motor mounted to the support cylinder to drive the pinion. It features.
    1 shows a laser beam welding head according to the present invention.
    2 is a perspective view of a rotating cylinder of the present invention
    3 is a prior art
    * Explanation of symbols for main parts of the drawings
    1: condenser lens 2: laser beam
    3: rotating cylinder 4: inclined portion
    5: support cylinder 6: flange
    7, 8: jaw for stopper 9: gear
    10: hole 11: pinion
    12: Servo motor 13: Reflection mirror
    14: circular welding point
    Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.
    1 is a view showing a laser beam welding head according to the present invention, Figure 2 is a view showing a perspective view of a rotating cylinder according to the present invention.
    In the drawing, reference numeral 1 denotes a lens in which a laser beam 2 irradiated from a laser beam irradiator (not shown) as a condenser lens is incident on parallel light rays and is concentrated at one focal point.
    The condenser lens 1 is supported by being mounted on the upper inclined portion 4 of the rotating cylinder 3 formed by obliquely cutting the upper portion of the hollow pipe, and the rotating cylinder 3 is a support cylinder forming a housing of the welding head. (5) so that its flange (6) is sandwiched between the stopper jaws (7) (8) and rotatably supported.
    In addition, a gear 9 is mounted at the lower end of the rotary cylinder 3, and a hole 10 is formed at the center of the gear 9 to allow passage of the laser beam 2.
    The gear 9 rotates in engagement with a pinion 11 having a smaller diameter, and a servomotor 12 for driving the pinion 11 is fixedly mounted to the support cylinder 5.
    Reference numeral 13 denotes a reflection mirror that guides the laser beam 2 irradiated horizontally to the condensing lens 1 and guides it.
    In the present invention, when the laser beam 2 irradiated in parallel is incident on the condensing lens 1, a focus is formed at a point A in the illustrated state, and this focus forms a starting point of the circular welding point 14.
    At this time, when the servo motor 12 is driven, the gear 9 is slowly rotated at a reduced speed through the pinion 11.
    Accordingly, the rotating cylinder 3 and the condenser lens 1 also rotate, and the focus moves along the edge trajectory 15 of the circular welding point 14 due to the rotation of the condenser lens 1 to be welded at a position rotated 180 °. The point is located at point B.
    Subsequently, when the gear 9 rotates 360 °, the focus reaches the original position A, thereby completing the work of one welding point.
    According to the present invention as described above, by collecting the laser beam and focusing the focusing lens focused on the focus on the rotating inclined surface and gradually rotated horizontally, the focus trajectory is moved along the edge of the circular welding point exactly and at constant speed welding As a result, the welding speed is greatly improved compared to the resistance point welding, and the welding strength is increased by the uniformity of the welding speed, and the rotation speed of the laser beam can be obtained by changing the gear ratio.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] A rotating cylinder having a condensing lens for concentrating the irradiated laser beam into one place, a rotating cylinder having an inclined surface for supporting the condensing lens obliquely, a supporting cylinder for guiding rotation of the rotating cylinder, and a laser mounted at a lower portion of the rotating cylinder And a gear having a hole for allowing the beam to pass therethrough, a pinion for decelerating the gear, and a servomotor mounted to the support cylinder to drive the pinion.
    [2" claim-type="Currently amended] 2. The laser beam welding head according to claim 1, wherein the rotating cylinder is interposed between the stopper jaws of the support cylinder to guide a horizontal rotation.
    [3" claim-type="Currently amended] The laser beam welding head according to claim 1, further comprising a reflection mirror for reflecting a path of the laser beam toward the condenser lens.
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    同族专利:
    公开号 | 公开日
    KR100249701B1|2000-04-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-30|Application filed by 박병재, 현대자동차 주식회사
    1996-12-30|Priority to KR1019960076024A
    1998-09-25|Publication of KR19980056754A
    2000-04-01|Application granted
    2000-04-01|Publication of KR100249701B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960076024A|KR100249701B1|1996-12-30|1996-12-30|Laser beam welding head|
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