Welding method for winding rotors and head combining sleeve

Abstract

The invention relates to a welding method for winding rotors and a head combining sleeve and belongs to the field of motor manufacturing processes. According to the welding method, motor rotor coils are embedded in a rotor iron core, end heads of the motor rotor coils are sleeved with a head combining sleeve; then the rotors are hoisted onto a welding workbench and horizontally placed; the insulating portions, close to the head combining sleeve, of the motor rotor coils are wrapped by a circle of waterishlogged asbestos rope; an electrode holder is wrapped by one to two layers of glass tapes; then the electrode holder clamps the head combining sleeve; welding is performed through a medium-frequency welding machine; before the head combining sleeve becomes completely red, a silver solder with the silver content being 15% is used for painting a gap between the head combining sleeve and the motor rotor coils one time; and after the head combining sleeve becomes completely red, the gap between the head combining sleeve and the motor rotor coils and the end faces of the head combining sleeve and the motor rotor coils are uniformly and smoothly painted with silver solder and soldering flux. The welding method achieves the purposes that the welding time is short, the work efficiency is high, insulating damage is small, welding is thorough, and process reliability is good.

Description

[0001] technical field [0002] The invention relates to a welding method for parallel ends of wound rotors, which belongs to the field of motor manufacturing technology. It has great practical value for the production and manufacture of wound rotors. Background technique [0003] Wound rotor motors are widely used in industrial and agricultural production because of their excellent starting and speed regulating performance. At the same time, because its structure is more complicated than that of the cage rotor motor, maintenance is more troublesome, so higher requirements are put forward for the manufacturing process and manufacturing quality of the motor. In addition to the common problems of brush sparks and brush lifting short-circuit device failures, quality problems caused by unreliable welding of rotor coils and headgears also account for a large proportion. [0004] With the same welding thickness, intermediate frequency welding requires less welding current than...

AI Technical Summary

Problems solved by technology

Generally speaking, the joint part of the rotor has three layers in the thickness direction, and the overall thickness is relatively large. Traditional welding is not easy to penetrate, and the joint head surface is heated unevenly. After melting, the silver solder flows into the high temperature place in large quantities and enters the coil insulation part. Low temperature is easy to desoldering, false soldering

After cooling, the appearance is uneven, there are a lot of welding bumps and welding slag, and the waste of solder is serious

Secondly, despite the protection of the water-soaked asbestos rope, the insulation damage of the coil is still serious, which increases the difficulty of the insulation of the later package and head

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