Machining technology for ultrasonic welding copper strip

Abstract

The invention discloses a machining technology for an ultrasonic welding copper strip. The machining technology comprises the following steps that a grinding wheel is used for conducting roughness grinding machining on the surface of a roller, wherein 1a, a grinding wheel of 95-105 meshes is installed, the position of the grinding wheel is adjusted, the position of a roller bracket is adjusted, roller surface grinding treatment is conducted, and the roller surface is cleaned; and 1b, a grinding wheel of 115-125 meshes is adopted for replacement, roller surface grinding treatment is conducted again, the roller surface is cleaned, and a roller with the surface roughness being Ra0.6-0.7 micron is obtained; and secondly, the roller obtained after grinding machining is used for conducting rolling treatment on the surface of the copper strip, and the copper strip with the surface roughness being Ra0.5-0.65 micron is obtained. The copper strip surface roughness can be effectively improved, the copper strip surface roughness is uniform, the copper strip is not prone to skidding during ultrasonic welding, the contact area is large, and the welding quality is good; and the copper strip surface clearness and oxidation resisting capability are improved, and the quality of the copper strip is improved.

Description

technical field [0001] The invention relates to the technical field of copper strip processing, in particular to a processing technology of copper strip for ultrasonic welding. Background technique [0002] Ultrasonic welding is widely used after multi-layer stacking of copper strips; the surface roughness of conventional copper strips is Ra0.2-0.35μm or even lower. During ultrasonic welding, the welding is not strong and easy to peel off, which affects the welding quality. [0003] The lower the surface roughness of the copper strip, the cleaner the surface and the less ash content, which is beneficial to welding such as argon arc welding and laser welding, but the low roughness reduces the contact area between layers, and the high-frequency vibration during ultrasonic welding is easy to slip , can not generate heat, which affects the quality of ultrasonic welding; therefore, how to improve the surface roughness of the copper strip and increase the contact area between the ...

AI Technical Summary

Problems solved by technology

[0002] Ultrasonic welding is widely used after multi-layer stacking of copper strips; the surface roughness of conventional copper strips is Ra0.2-0.35μm or even lower. During ultrasonic welding, the welding is not strong and easy to peel off, which affects the welding quality.

[0003] The lower the surface roughness of the copper strip, the cleaner the surface and the less ash content, which is beneficial to welding such as argon arc welding and laser welding, but the low roughness reduces the contact area between layers, and the high-frequency vibration during ultrasonic welding is easy to slip , can not generate heat, which affects the quality of ultrasonic welding; therefore, how to improve the surface roughness of the copper strip and increase the contact area between the layers of the copper strip is one of the technical problems that need to be solved; after the roughness is increased, the surface of the copper strip is prone to residual rolling lubrication The ash content after evaporation of the passivation solution and the passivation solution and the absorption of moisture in the air make the copper strip extremely easy to oxidize and discolor. How to improve the oxidation resistance of the high-roughness copper strip is another technical problem that needs to be solved

[0004] There are certain defects in existing methods for improving the surface roughness of the copper strip, as follows: 1. Increase the surface roughness of the copper strip by improving the surface roughness of the copper strip roll, and its general grinding method is difficult to obtain a high-roughness roll 2. Improve the surface roughness of the copper strip by brushing, the uniformity of the copper strip surface roughness is poor, the brush consumption is high and the cost is high, and scratches are easy to appear on the copper strip surface, and the welding quality is not good

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