Large cover plate self-limiting method in laser seal welding
A cover plate and laser technology, which is applied to laser welding equipment, welding equipment, workpiece edge parts, etc., can solve problems such as cover plate warping, reduce labor intensity, improve product consistency and yield.
Active Publication Date: 2015-04-22
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology
[0005] The present invention aims to solve the problem of how to limit the warpage of the cover plate without using the pressure block and the auxiliary mechanical structure in laser welding for electronic products with airtightness requirements
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[0019] Describe the present invention below in conjunction with specific embodiment:
[0020] This example is laser sealing and welding of a frequency source component. The material of the cavity is LD31, the material of the cover is 4047, the thickness is 0.75mm, and the size is 20×40mm. It belongs to the category of large cover. It is easy to cause deformation of the cover plate, and the use of pressing blocks and auxiliary mechanical structures will lead to low work efficiency. For this reason, a small protrusion is involved on the edge of the cover plate, the height of which is The protrusion spacing is 10mm. In the glove box, press the cover plate into the groove of the cavity cover plate with a force of 3kg. The welding seam is smooth and the cover plate will not fall off after the welding surface faces the direction of gravity. Then place the part to be welded on the workbench with the side to be welded facing up. Next, laser sealing and welding is directly performe...
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Abstract
The invention provides a large cover plate self-limiting method in laser seal welding. A small projection structure is produced in a groove for placing a cover plate, wherein the groove is formed in the cover plate or a chamber body. when the cover plate and the chamber body are assembled, the interference fit can be formed between the cover plate and the cover plate groove due to the small projection so as to implement the self-limiting in the welding process. Compared with the prior art, the self-limiting of the cover plate can be implemented and the dotting, a pressing block or the mechanical auxiliary limiting is not required in the welding process; the working efficiency is improved for more than 50% in comparison with the dotting and the working efficiency is improved for more than 30% in comparison with the auxiliary limiting through the practice test; the labor intensity is reduced and the product consistency and the yield are improved.
Description
technical field [0001] The invention relates to the field of laser sealing and welding of airtight packaging of electronic products. Aiming at the problem that the large cover plate warps due to temperature changes and affects the welding quality during the laser sealing and welding process, it proposes a cover plate that does not require a pressing block or a mechanical limit self-limiting method. Background technique [0002] Laser sealing and welding technology is widely used in the airtight packaging of electronic devices, and is an efficient, high-precision, and highly reliable connection method. Laser seal welding uses a directional laser beam as a heat source, with high energy density and concentration, and the molten pool area melts in a short time, while the temperature of the non-melted pool area is much lower than that of the molten pool area, forming a large temperature gradient and inducing thermal deformation. The board is warped. If there are no fixing measu...
Claims
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IPC IPC(8): B23K26/70
CPCB23K26/26B23K33/00B23K2101/36
Inventor 孙毅崔西会何文灿陈忠睿
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP