Forming method of automobile generator claw pole

Abstract

The invention relates to a forming method of an automobile generator claw pole, in particular to a flash-free closed precision forging method of the automobile generator claw pole. The forming method of the automobile generator claw pole comprises the steps: cutting material, heating, upsetting, annealing, shot blasting, direct-extrusion and finishing, fine turning and processing, and the like. The forming method is characterized in that: the method also comprises two steps of a divided-flow direct-extrusion hot pre-forging and a return-flow direct-extrusion hot finish forging which are between the steps of upsetting and annealing and realized by a hot pre-forging die and a hot finish forging die respectively. With novel conception, the automobile generator claw pole produced with the forming method is free of flash and burrs and has high forming quality of the six claws as well as clear and full edges and corners. Meanwhile, the forming method has the advantages of low forming loads, long service life of dies, low energy consumption in production and saving production materials and production time.

Description

Technical field: [0001] The invention relates to a method for forming a claw pole of an automobile generator, in particular to a technical method for a closed-type precision forging without flashing of the claw pole of an automobile generator. Background technique: [0002] The claw pole is the key component of the automobile generator and the main component used to form the rotating magnetic field. Its forming accuracy will directly affect the generator's power generation capacity, the waveform of the induced electromotive force and the performance of the whole vehicle. The forming techniques of the claw pole include casting, sheet metal blanking and bending, open hot die forging and hot back extrusion. Using the casting method to manufacture the claw pole, the electromagnetic performance of the claw pole is poor; using the punching and bending method to manufacture the claw pole, the process is cumbersome, the material utilization rate is low, the production cost is high, ...

AI Technical Summary

Problems solved by technology

[0004] In short, the existing production technology of automobile generator claw poles still has problems such as long process steps, high impact force, poor surface quality of parts, short mold life, large waste of materials, high man-hours and high energy consumption.

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