Method for making enameled aluminium flat wire

Abstract

Disclosed is a method for fabricating flat enamelled aluminium wires, relating to enamelled wire fabrication method. The invention adopts extrusion technique and equipment and squeezes out a flat aluminium wire profile through a die orifice under the action of high temperature and high pressure generated by friction. The fabrication method mainly includes the following steps: (1), straightening an aluminium pole; (2), washing the aluminium pole with neutral solution; (3), continuously squeezing the aluminium pole with special extrusion equipment into a flat aluminium wire; (4), cooling the flat aluminium wire water to below 60 DEG C; (5), coating insulation lacquer on the flat aluminium wire; (6), firing and drying the coated flat aluminium wire between 200 DEG C and 440 DEG C; and (7), cooling the flat enamelled aluminium wire in air to room temperature. In this way, a finished flat enamelled aluminium wire can be obtained. The special extrusion equipment comprises an extrusion wheel; a compression wheel is composed of a pair of opposite grinding compression rollers; and a circular groove is arranged at the center of the face of the extrusion wheel; a flow guide plate is arrangedat the upper part of the die orifice and a baffle is arranged at the lower part of the die orifice. The flat enamelled aluminium wire can be used on a transformer, a motor and particularly on intermittent products like a UPS electrical source or a regulator.

Description

Technical field: [0001] The invention relates to a manufacturing method of an enameled wire. In particular, the invention relates to a manufacturing method of an enamelled aluminum flat wire. Background technique: [0002] Enameled aluminum flat wire is a new type of enameled wire that can replace enamelled copper flat wire. Enamelled aluminum flat wire is used in transformers, motors, especially intermittent products such as UPS power supplies and voltage stabilizers. The enamelled aluminum flat wire is similar to the enamelled copper flat wire due to its electromagnetic properties, and the specific gravity of aluminum is lighter than that of copper, and the price of aluminum is much lower than that of copper. Therefore, the cost can be greatly reduced, and its excellent Insulation and heat resistance are widely concerned by the industry. [0003] The traditional enamelled aluminum flat wire production process is to extend the aluminum rod through drawing to make it plas...

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Problems solved by technology

[0004] However, the traditional enamelled flat aluminum wire production process has many disadvantages. For example, the drawn and extended aluminum flat wire often has defects such as stretching, scratches, heavy skin, and burrs; the surface of the defective aluminum flat wire is coated with insulation The lacquer is not only prone to surface problems such as lacquer bumps and pimples on the surface, but also easily causes problems such as unqualified voltage and unstable performance of enamelled aluminum flat wires during use; therefore, defective aluminum flat wires will be damaged by paint. The process brings a lot of inconvenience, which buryes quality hidden dangers for product performance; in addition, due to the alkaline waste liquid generated during the cleaning process of the aluminum flat wire, there is a pollution problem to the environment; because the drawn and extended aluminum flat wire is in a hard state, The aluminum flat wire needs to be annealed during the painting process; the aluminum flat wire may be thinned during the annealing process and does not meet the requirements, and the power consumption increases, thus wasting energy

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