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Light absorption coating used for increasing melting depth of aluminum-copper dissimilar metal laser welding and laser welding process method

A technology of dissimilar metals and light-absorbing coatings, applied in the welding of aluminum-copper dissimilar metals, laser welding of aluminum-copper dissimilar metals, and new energy power batteries, can solve problems such as complex processes, low production efficiency, and low laser utilization, and achieve Improve mechanical properties, improve production efficiency and penetration, and increase utilization

Inactive Publication Date: 2019-07-26
JIANGSU JICUI ADVANCED METAL MATERIAL RES INST CO LTD
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Problems solved by technology

[0006] Aiming at the above-mentioned defects in the prior art, the present invention provides a process method for increasing the penetration depth of aluminum-copper laser welding, which aims to solve the shortcomings of traditional laser welding methods such as complex process, low laser utilization rate, and low production efficiency, and can effectively improve Laser welding productivity and penetration while improving mechanical properties of welded joints

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  • Light absorption coating used for increasing melting depth of aluminum-copper dissimilar metal laser welding and laser welding process method
  • Light absorption coating used for increasing melting depth of aluminum-copper dissimilar metal laser welding and laser welding process method
  • Light absorption coating used for increasing melting depth of aluminum-copper dissimilar metal laser welding and laser welding process method

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Embodiment Construction

[0025] The present invention will be further described in detail below in combination with specific embodiments.

[0026] 1. Production of graphite coating:

[0027] Production of graphite coating: Weigh 90% of graphite, 5% of acrylate, 3% of rubber, and 2% of borax with a balance by weight percentage, put them in a beaker for mixing, stir evenly and then use for coating;

[0028] 2. Make the test piece by shearing plate: use the CNC shearing machine with the width and length of the shearing plate not less than 1mm to cut copper T2 and aluminum 1060 with a thickness of 0.3mm, and the size is 100mm×20mm;

[0029] 3. Laser cleaning of the surface of the workpiece to be welded: use laser cleaning equipment with an average power of not less than 200W and a pulse frequency of 105Hz to remove oil stains and oxide films on the surface of the workpiece to be welded, see metallic luster;

[0030] 4. Clamping of welding parts: place the aluminum plate under the copper plate, and press ...

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Abstract

The invention discloses a light absorption coating used for increasing the melting depth of aluminum-copper dissimilar metal laser welding and a laser welding process method. A light absorption coating is formed by coating a carbon-based light absorption coating. The light absorption coating is formed on the surface, and meanwhile, the process method that copper is located at the upper position and aluminum is located at the lower position is combined, so that the process of a traditional laser welding method is complex, the laser utilization rate is low, the production efficiency is low and the like are effectively solved, the laser welding production efficiency and the welding depth can be effectively improved, and meanwhile, the mechanical property of a welding joint is improved.

Description

technical field [0001] The invention relates to the technical field of welding of aluminum-copper dissimilar metals in the field of new energy power batteries, in particular to the technical field of laser welding of aluminum-copper dissimilar metals. Background technique [0002] As people's requirements for power battery energy density and cruising range are getting higher and higher, an effective way is to use different materials for different parts, and use optimal material and structural design to reduce cost, weight, increase energy density and Purpose of cruising range. One of the representatives is the connection of aluminum and copper dissimilar metals. Laser welding is widely used in the welding of dissimilar metals due to its advantages of high energy density, fast welding speed, small heat input, and small welding deformation. However, the high emissivity of aluminum and copper makes the two metals have a low absorption rate of laser power. During lap welding o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/24B23K26/352B23K26/70B23K101/06
CPCB23K26/0006B23K26/24B23K26/352B23K26/702B23K2101/36
Inventor 薛志清赵锐李乡亮
Owner JIANGSU JICUI ADVANCED METAL MATERIAL RES INST CO LTD
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