Draw welding method for micro-miniature conduction slip ring

Abstract

The invention provides a draw welding method for a micro-miniature conduction slip ring. The method includes the steps of cleaning, thread feeding, thread stripping, oxide layer removing, wire tin hotdip coating, welding, cleaning, drying and the like, and then the satisfactory ring piece of wire welding is obtained. The method solves the problem that the welding quality of the micro-miniature conduction slip ring is not good. By using the method, the welding area can be enlarged, the welding quality and reliability of the ring piece can be improved, the intensity of a welding spot can be enhanced, the welding efficiency can be improved, virtual welding phenomena can be avoided at the same time, and the whole performance of the conduction slip ring can be obviously improved. The method further has the advantages of effectively improving the pouring yield of the micro-miniature conduction slip ring, reducing waste and lowering the production cost. The method solves the problem that thewelding quality of the micro-miniature conduction slip ring is not good, and is suitable for the production of the high-accuracy micro-miniature conduction slip ring.

Description

technical field [0001] The invention relates to a welding method, in particular to a hook welding method suitable for the production of high-precision miniature conductive slip rings. Background technique [0002] A conductive slip ring is a device for transmitting electrical power and electrical signals. Its working principle is to realize the precise transmission of electrical signals between the two parts through the relative rotation of the static part and the rotating part of the conductive slip ring. Commonly used in turntable, gyro platform, artillery control, navigation guidance, radar antenna, theodolite and other equipment. [0003] Due to the small structural size of the miniature conductive slip ring, the outer diameter of the ring piece is Ø6.8mm, the inner diameter is Ø4.4mm, and the thickness is 0.25mm. On this ring piece with a compact structure size, wire welding is required, and due to the narrow operating space, It leads to low welding efficiency (only ab...

AI Technical Summary

Problems solved by technology

[0003] Due to the small structural size of the miniature conductive slip ring, the outer diameter of the ring piece is Ø6.8mm, the inner diameter is Ø4.4mm, and the thickness is 0.25mm. On this ring piece with a compact structure size, wire welding is required, and due to the narrow operating space, It leads to low welding efficiency (only about 60 pieces of ring pieces can be welded in one day), and at the same time, due to the small welding area, the strength of the solder joints cannot be effectively controlled, which will easily cause false welding of the solder joints, resulting in a large number of defective products and a lot of waste. large, increasing production costs

At the same time, during the vacuum casting process of the welded ring piece, due to the inconsistent thermal expansion coefficients of the epoxy glue and the ring piece, the solder joints on the interface between the epoxy glue and the ring piece are under high and low temperature conditions. There is a risk that the solder joints will fall off to a certain extent, resulting in the failure of a certain loop of the product and the failure of the whole machine.

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