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Laser welding device, gas shielding device and method for controlling laser welding device

A laser welding and laser technology, applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., can solve complex equipment and other problems

Inactive Publication Date: 2004-10-20
HOKKAIDO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this conventional method requires large and complex equipment

Method used

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  • Laser welding device, gas shielding device and method for controlling laser welding device
  • Laser welding device, gas shielding device and method for controlling laser welding device
  • Laser welding device, gas shielding device and method for controlling laser welding device

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings.

[0033] figure 1 The structure of the laser welding head in the laser welding apparatus of this invention is shown. figure 1 The laser welding head shown has a laser irradiation body 1 including a YAG laser inlet 5 and a laser outlet 6, semiconductor laser devices 2 and 3 as light sources for measuring the welding state of parts to be welded, and in addition, a CCD as an imaging device The camera 4 is connected with the laser welding head. The CCD camera 4 constitutes the laser welding head position control device in the present invention, and receives the laser beam from the semiconductor laser. The laser welding head position control device also has an image processor (not shown) for image processing. A laser beam from a laser oscillator (not shown) such as a YAG laser is introduced into the laser inlet 5 through an optical fiber (not shown), and then the amplified...

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Abstract

A laser welding apparatus includes a laser welding head and a laser welding head position-controlling apparatus. The laser welding head includes a laser irradiating body with an inert gas nozzle to blow off an inert gas for welding parts of members to be welded and at least one shielding gas nozzle, at the outside of the inert gas nozzle, to blow off a shielding gas for the surrounding area of the welding parts, and plural semiconductor lasers to oscillate plural linear laser beams for measuring the welding state of the members to be welded. The laser welding head position-controlling apparatus includes an imaging apparatus with a band-pass filter therein.

Description

technical field [0001] The invention relates to a laser welding device, a gas shielding device and a method for controlling a laser welding device. Background technique [0002] Laser welding technology uses a 10 5 -10 6 W / cm 2 A laser beam of high energy density, which is equal to the energy density of an electron beam. Because laser welding technology also uses rapid heat processing, it only needs 1 / 10 the power input into the parts to be welded compared to other welding technologies, it will not cause thermal deformation of the parts, and almost never will heat the components. Therefore, laser welding technology can accurately weld parts made of metal materials at high speed in the atmosphere. In particular, in the laser technique using the YAG laser, since the YAG laser beam is absorbed to a high degree into the parts to be welded, the parts can be welded with high efficiency. Also, since the laser beam can be transmitted through an optical fiber, the YAG laser wel...

Claims

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Application Information

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IPC IPC(8): B23K26/03B23K26/04B23K26/064B23K26/14B23K26/21
CPCB23K26/1476B23K26/04B23K26/045B23K26/1441B23K26/044B23K26/1436B23K26/20B23K26/21
Inventor 武笠幸一池田正幸末冈和久上田映介上远野久夫武藤征一
Owner HOKKAIDO UNIVERSITY