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T-shape joint double light beam laser synchronous welding method and device

A laser welding and double-beam technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as weld defects, achieve high welding efficiency, convenient adjustment, and the effect of controlling stress and deformation

Inactive Publication Date: 2005-03-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, laser welding using filler wire has extremely strict requirements on the directivity of the welding wire and the welding process. The quality of laser welding depends on the alignment accuracy of the welding wire. Any disturbance in the welding wire feeding process will immediately lead to weld defects.

Method used

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  • T-shape joint double light beam laser synchronous welding method and device
  • T-shape joint double light beam laser synchronous welding method and device
  • T-shape joint double light beam laser synchronous welding method and device

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Embodiment Construction

[0025] Embodiments of the present invention refer to the above drawings. Generally, the traditional method of splitting a laser beam into two laser beams by using a half-mirror or a beam-splitting prism is suitable for the above-mentioned purpose in principle. However, the half mirror is generally suitable for splitting the light of YAG laser, while the beam splitting prism is not suitable for high power CO 2 Laser beam splitting, because the top of the prism may be melted and damaged when the high-power laser is irradiated. And what the beam splitter in the present invention adopts is the metal reflector, because the excellent thermal conductivity of metal and the high reflectivity to laser beam, make the metal reflector can bear the laser beam of higher power density. Not only that, the good cooling of the metal mirror can eliminate the negative effect caused by uneven heating that is easily produced by the half-transparent mirror or the beam-splitting prism, so the metal m...

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Abstract

The present invention relates to double laser beam synchronizing welding method and apparatus for T-shaped joint. The present invention features that the laser beam from one laser source is split into two laser beams, which are focused onto two sides of the T-shaped joint with two independent welding heads, and two welding powder feeders are used to convey powder to two sides of laser molten pool for sync welding. For realizing the said sync welding, one welder is proposed, which has one laser to produce main laser beam, one laser splitting and focusing unit to form two sync laser beams, and one powder feeder to produce two powder flows. The sync welding from two sides of the T-shaped joint results in high welding efficiency, and simultaneous cooling and contraction of two-in-one molten pool favorable to control in the stress and deformation.

Description

technical field [0001] The invention relates to a high-power laser processing method, in particular to laser welding of T-shaped joints. Background technique [0002] In the manufacture of ships, aircraft, etc., there are a large number of T-joints. The connection methods of T-joints include riveting, bonding and welding. Riveting and bonding are not only low in production efficiency, but also waste materials and increase the weight of the structure. Therefore, they are mainly used in the connection of some materials and structures that are difficult to weld or cannot meet the requirements of traditional welding methods, such as the connection of high-strength aluminum alloy structures in aircraft manufacturing. The main method is to use riveting. Compared with riveting and bonding, welding has high production efficiency and is the most important method for various structural connections including T-joints. However, traditional welding methods—such as flame, electric arc,...

Claims

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Application Information

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IPC IPC(8): B23K26/067B23K26/24B23K26/70
Inventor 左铁钏肖荣诗陈铠于振声杨武雄张盛海
Owner BEIJING UNIV OF TECH
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