Die-pressing processing method for bar coils of motor

Abstract

The invention relates to a die-pressing processing method for bar coils of a motor, and belongs to the technical field of motor coils. The die-pressing processing method for the bar coils of the motor is characterized in that transposition is carried out from the straight line of the bar coils to two thirds of the end, and a lead wire welds the finished coils. The method comprises the following processes: 1) binding a main insulator: a, placing upper and lower bar coils on a coil bracket of a binding machine respectively; b, adjusting the geometrical size of the end of the binding machine, and arranging a required end elevating cushion block at the end of the binding machine; and c, binding the main insulator according to the compression amount given by the process; 2) treating an anti-halation structure; and 3) die-pressing processing and molding, namely flatly wrapping a layer of polytetrafluoroethylene film strip on the upper and lower bar coils, putting the bar coils into a bar coil die-pressing die respectively, providing current from the lead wire of the coils by adopting a pressurizing mode of a hydraulic cylinder, and performing die-pressing processing and molding on the coils from the interior to the surface by adopting a curing mode and a heating method. The method has the advantages of simple process, high insulating strength, reduced breakdown rate, long service life, high production efficiency, attractive appearance, and the like.

Description

technical field

[0001] The invention belongs to the technical field of motor coils, and in particular relates to a method for molding a motor strip coil. Background technique

[0002] At present, the design structure of the strip-shaped coil of the hydro-generator is: the pitch is short, and the straight line is no longer than 2 / 3 of the break, so as to reduce the main size of the motor and reduce the manufacturing cost of the motor; brought great difficulty. In the production of coils in the molding process, it is easy to have insulation breakdown to the ground, and 95% of the breakdown points occur at the corners of the straight line, and the cross-sectional size of the coil at the corner R of the straight line increases, and the edge is corrugated after pressing to the ground Angle, affecting the appearance quality and insulation quality, the size is not guaranteed. The coil scrap rate is high, resulting in waste of raw materials. Contents of the invention

[0003] I...

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