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Laser transmission composite connecting method

A technology of laser transmission and composite connection, which is applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as weld damage, achieve local connection firmness, reliable connection strength, and improve the effect of connection strength

Inactive Publication Date: 2013-05-01
JIANGSU UNIV
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  • Abstract
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Problems solved by technology

The document "The Effect of Laser Shock Surface Strengthening on the Mechanical Properties of Welded Joints" describes a method for surface strengthening treatment of welded joints to improve tensile strength. This method is to improve the strength of welded connections after welding. In transmission welding Inevitably cause damage to the weld seam after welding

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Embodiment Construction

[0017] Below in conjunction with specific embodiment the present invention is further described, weld transparent nylon and 304 stainless steel metals with the present invention.

[0018] Welding preparation: The selected welding transparent light-transmitting material nylon 12 has a size of 10x10x2mm, and the light-absorbing material 304 stainless steel 14 has a size of 10x10x0.6mm. The laser transmission welding laser uses a continuous energy semiconductor laser generator 7 with a maximum power of 130w and a wavelength of 980nm±10nm.

[0019] Surface treatment of the weldment: The sample 304 stainless steel 15 is ultrasonically cleaned with ethanol to remove surface impurities, placed on the workbench of the electric discharge machine tool, and processed with a copper tungsten electrode with a standard electrode diameter of 250um. According to the welding area position of the actual material, clean the impurities on the surface of nylon 13 with ethanol at the same time, and ...

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Abstract

The invention discloses a laser transmission composite connecting method, which belongs to the technical field of laser transmission welding and particularly relates to the laser transmission welding of metal and polymers. According to the method, firstly, the surface of the metal material to be welded is subjected to electric spark processing, concave pits are formed at the surface of the metal material, during the welding, the metal with the surface subjected to the electric spark processing is used as a lower layer light absorption material, the polymers are used as an upper layer light transmission material, a lap joint connection form is adopted, a restraining layer is used for clamping, in addition, the welding pressure is exerted, a semiconductor laser is used for carrying out laser transmission welding, the surface temperature can fast reach the melting point of the upper layer polymers, the surface of the polymers is melt, the surface of the lower layer metal is subjected to the electric spark processing, the concave pits are formed, so the melt polymers at the surface flow into the concave pits under the effect of the welding pressure, an engaging interface of the similar riveting structure is formed at the welding line part, and the improvement of the connection intensity of the laser transmission welding can be realized. The laser transmission composite connecting method can be widely applied to the field of the laser transmission welding with higher connection intensity requirements.

Description

technical field [0001] The invention belongs to the technical field of laser transmission welding, in particular to a method for laser transmission composite connection. The method of electric spark treatment forms pits on the metal surface. During laser transmission welding, the molten polymer flows into the pits under the action of welding pressure, forming a occlusal interface similar to a riveting structure at the weld, increasing the metal and polymer. The connection contact area of ​​the material can be improved, so that the metal and the polymer can be better combined with each other, and the connection strength of the laser transmission welding can be improved. Background technique [0002] At present, laser transmission welding technology is widely used in the field of welding processing of the same and dissimilar materials such as polymers and polymers, and polymers and metals. Its characteristics are: fast, non-contact, accurate, small heat-affected zone, etc. Wi...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K26/18B23K26/42B23K26/244B23K26/70
CPCB29C65/1616B29C65/1635B29C65/1654B29C65/44B29C66/02B29C66/1122B29C66/30325B29C66/41B29C66/43B29C66/71B29C66/742B29C66/74283B29C66/8122B29C66/81267B29C66/8322B29C66/836B29C66/9221B29C66/929B29C66/939B29K2077/00B29K2909/08
Inventor 刘会霞赵振关陈浩黄创严长顾宇轩张迪马友娟范彩莲李品王霄
Owner JIANGSU UNIV
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