A manufacturing process of an exciter stator iron core

Abstract

The invention discloses a manufacturing process of an exciter stator iron core, comprising a stator punching sheet blanking step, a V-shaped buckle groove blanking step, an iron core laminating step and an iron core welding step. When the V-shaped buckle groove blanking step is carried out, a separate V-shaped buckle groove punching die is adopted, and the V-shaped buckle grooves are left on the upper surface of the stator punching pieces and the V-shaped flanges are left on the lower surface of the stator punching pieces correspondingly through the pressing of the punch edge. When the iron core laminating step is performed, the laminating and demoulding fixture installed on the hydraulic press is used, the stator punching sheets are laminated to sleeve a laminating mold mandrel in turn insuch a manner that the V-shape flange on the lower surface of the preceding stator punching piece is correspondingly embedded in the V-shaped buckle groove of the lower stator punching piece, and after a design thickness is reduced, the stator iron core is pressed down by the laminating mold pressing head, and then the laminating mold discharge plate is pushed up by the hydraulic press lower ejector rod to eject the pressed stator core out of the laminating mold mandrel. The invention solves the problems of deformation of the iron core during lamination and demoulding after lamination.

Description

technical field [0001] The invention relates to a manufacturing process of an exciter stator iron core. Background technique [0002] The existing small and medium-sized three-phase alternators at home and abroad have two structural forms: a brushed three-phase alternator and a brushless three-phase alternator. Brushless three-phase alternators (power 8.6Kw ~ 3000Kw, frequency 50Hz, speed 1500 rpm) are popular at home and abroad today, which is also the development trend of the world today. However, a brushless three-phase alternator has an exciter to excite the main rotor current and voltage. The exciter stator includes a solid stator core 4 connected by welds 6 and a stator coil 5 installed on the stator core 4, and the exciter rotor includes a rotor core 2 connected by weld rivets 1 and installed on the rotor core 2 on the rotor coil 3, where the air gap between the stator core 4 and the rotor core 2 is quite small (see Figure 1a with Figure 1b ), the single-sided ai...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a manufacturing process for the stator core of the exciter, which can ensure the lamination of the iron core without adding expensive equipment and on the basis of the original common equipment. The tightness between the punching sheets and the punching sheets ensures the concentricity of the iron core stacking, solves the problem of stator deformation, and also solves the problem of difficult demoulding after the iron core is stacked

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