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Laser beam welding method and apparatus

A laser beam, welding direction technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of low productivity, complex welding system structure, unable to weld the contact surface of overlapping plates, etc., to improve productivity, simple Process and layout, the effect of efficient and fast welding

Inactive Publication Date: 2010-07-07
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The welding process according to prior art 2 consists of multiple welding steps and has low productivity since three plates have to be irradiated with two laser beams applied in different directions
[0017] With prior art 3, the welding system is structurally complicated, and since it is necessary to move the laser beam welding machine 7a along a Z-shaped pattern, the welding system is also structurally and controllly complicated, and it may not be possible to weld metals having different thicknesses. The contact surface of the overlapping plate with the material

Method used

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  • Laser beam welding method and apparatus
  • Laser beam welding method and apparatus
  • Laser beam welding method and apparatus

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Embodiment Construction

[0061] FIG. 1 shows a laser beam welding apparatus 10 for performing a laser beam welding method according to a first embodiment of the present invention in the form of a side view, a partial sectional view and a block diagram.

[0062] The laser beam welding apparatus 10 is not limited to one particular use, but may be used for welding galvanized steel sheets W1, W2 such as roof panels of motor vehicles.

[0063] The laser beam welding equipment 10 includes a holding mechanism 12, a laser beam applying mechanism 14, a mechanical arm (moving mechanism) 16, and a control mechanism 18, wherein the holding mechanism 12 is used to position and hold the welding areas of the steel plates W1, W2, and the laser beam The beam applying mechanism 14 is used to apply the first laser beam L1 to the heating area P1 of the steel plate W1 near the holding mechanism 12 to heat the heating area P1 and to apply the second laser beam L2 to the area separated from the first laser beam L1 by a given...

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Abstract

While steel sheets (W1, W2) are positioned and held by a holding mechanism (12), a first laser beam (L1) is applied to a heating region (P1) of the steel sheet (W1) to space the steel sheet (W1) from the other steel sheet (W2) by a predetermined distance. A second laser beam (L2) is applied to a welding region (P2) to weld the steel sheets (W1, W2). An amount of heat applied by the first laser beam (L1), a moving speed of the first laser beam (L1), and a focused spot diameter of the first laser beam (L1) are set to keep the sheet (W1) irradiated with the first laser beam (L1) in an unmelted state and plastically deform the sheet (W1).

Description

technical field [0001] The present invention relates to a method and apparatus for welding together overlapping areas of a plurality of plates, each having a base metal coated with a layer thereof, by applying a laser beam to the overlapping areas of the plates. A metal having a melting point lower than the melting point of the base metal. Background technique [0002] Japanese Patent Application No. 3115456 (hereinafter referred to as "Prior Art 1") discloses a known laser beam welding process for welding two mutually overlapping plates each having a base metal , the base metal is coated with a metal having a melting point lower than the melting point of the base metal. [0003] In accordance with the disclosed laser beam welding process, two galvanized steel sheets, i.e., two galvanized steel sheets, are superimposed on each other and supported with their free ends, wherein each sheet has a steel sheet as base metal , the base metal is coated with a layer of zinc having ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/067B23K26/24B23K26/32B23K26/00B23K26/02B23K26/08
CPCB23K26/246B23K2203/04B23K2201/18B23K26/023B23K26/0608B23K26/067B23K26/0853B23K26/3206B23K26/24B23K26/3293B23K26/037B23K26/32B23K26/244B23K2101/18B23K2101/34B23K2103/04B23K2103/08B23K2103/50
Inventor 小田幸治深井直树北川纯田边顺也大塚启示
Owner HONDA MOTOR CO LTD
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