Processing process of enameled aluminum flat wire

Abstract

The invention relates to a processing process of an enameled flat wire, in particular to a processing process of an enameled aluminum flat wire. The processing process takes the aluminum rim wire as the raw material and comprises the following steps: firstly, the aluminum rim wire is extruded to be formed through a cold extrusion press and then rewound; secondly, the flat wire in the first step isunwound at a uniform speed and softened through a softening furnace under the oxygen-free environment or the low oxygen environment and at the softening temperature of 480 to 520 DEG C; thirdly, thecontinuously softened flat wire with temperature of 480 to 520 DEG C is immerged into water with temperature of 20-30 DEG C under the oxygen-free environment or the low oxygen environment, and is taken out of the water and then blown and dried; fourthly, the 1731 polyester paint is evenly coated on the dried flat wire and then dried; and fifthly, the 1754 or 1765 polyester paint is evenly coated on the flat wire coated with the base paint, then dried and rewound to obtain the aluminum flat wire. The finished enameled aluminum flat wire manufactured through the process has good adhesion, less heat and has higher thermal shock resistance and good freeze-tolerance and solvent resistance.

Description

technical field [0001] The invention relates to a processing technology for enamelled flat wire, in particular to a processing technology for making enamelled flat wire with aluminum as raw material. Background technique [0002] At present, due to the rising price of copper, the production cost of products using copper as raw material remains high. Many domestic dry-type transformer factories have changed to use aluminum wire as the winding group. Since both aluminum and copper have high electrical conductivity, the density is only one-third of that of copper, and the unit cost can be greatly reduced relatively. Therefore, the enamelled aluminum flat wire came into being. It is coated with multi-layer insulating varnish coating on the bare wire. The finished product has good adhesion, high voltage resistance level, and no voltage drop after storage. However, the enamelled aluminum flat wire produced by the prior art still has the defects of low oxidation resistance of the ...

AI Technical Summary

Problems solved by technology

However, the enamelled aluminum flat wire produced by the prior art still has the defects of low oxidation resistance of the wire core, and the wire core size is smaller than the target size after shrinkage, and it is difficult to control the surface quality of the wire core and the thermal deformation of the wire core size during processing. Consistency in the future, there will be local problems of low primer adhesion and wire cores not conforming to the design size