Processing process of enameled flat aluminium wire

Abstract

The invention relates to a processing process of an enameled flat wire, in particular 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 pressed into a flat wire blank with a rectangular cross section through a pressing roll; secondly, the flat wire blank prepared in the first step is molded by cold drawing by adopting a cold-drawing wire-drawing device and rewound; thirdly, the flat wire in the second step is unwound at a uniform speed and is softened through a softening furnace under the oxygen-free environment or the low oxygen environment; fourthly, the continuously softened flat wire with the temperature of 480 to 520 DEG C is immerged into water with temperature of 20-30 DEG C to be cooled under the oxygen-free environment or the low oxygen environment and is taken out of the water and then blown and dried; fifthly, the 1731 polyester paint is evenly coated on the dried flat wire and then dried; and sixthly, 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, higher thermal shock resistance and good freeze-tolerance and solvent resistance.

Description

technical field [0001] The invention relates to a processing technique of an enameled flat wire, in particular to a processing technique of making an enameled flat wire with aluminum as a raw material. Background technique [0002] At present, due to the rising price of copper, the production cost of copper-based products remains high, and many domestic dry-type transformer factories have switched to 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 enameled 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 also has the defects of low oxidation resistance of the wire core, and ...

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