Hot edge-cutting manufacture technology for automobile generator finish forging claw pole

Abstract

The present invention relates to a hot-trimming fabrication technique of the finish-forged claw poles of an automobile generator. The hot-trimming fabrication technique includes the following steps: (a) blanking; (b) heating; (c) continuous upsetting; (d) preforging; (e) finish forging; (f) hot trimming; (g) magnetic annealing; (h) cold shaping; (i) finish machining. Since the hot trimming technique is adopted, the five processes, heating, continuous upsetting, preforging, finish forging and hot trimming, form flow line production, thus reducing the cost of logistics, moreover, the temperature of the product reaches 950 DEG C to 1050 DEG C during hot trimming, at the moment, the shearing strength of the material is low, as a result, the tonnage of equipment can be greatly reduced, the service life of equipment is increased, consequently, the production cost is reduced, and noise is decreased. Since the finish forging and hot trimming processes form a production line, the appearance quality of the finish-forged product is effectively controlled, and therefore the quality of the product is increased.

Description

technical field [0001] The invention relates to a manufacturing process of red trimming for precise forging claw poles of automobile generators. Background technique [0002] Modern cars have generally adopted electrical components such as air conditioners, electric injection engines, electronically controlled doors and windows, and electrically adjustable seats, and the power consumption has risen sharply. The alternator is the key component of the car, which is responsible for the power supply of the car. The configuration of the car is different, the power consumption demand is different, the alternator is different, and the corresponding claw poles are different. The alternator is mounted next to the engine and is turned by the engine to convert mechanical energy into electrical energy. The alternator is composed of two parts, the stator winding and the rotor winding. The three-phase stator windings are distributed on the housing according to the difference of 120 degre...

AI Technical Summary

Problems solved by technology

[0004] 1. Precision casting: The claws produced by this process are extremely prone to defects such as shrinkage cavities, looseness, inclusions, and chemical composition instability, which lead to increased reluctance and poor electromagnetic performance, which affects the power of the generator and cannot adapt to the volume of today's automotive generators. The development trend of shrinking and increasing power, moreover, casting is easy to produce hard spots, and it is not easy to machine

[0005] 2. Stamping process: This process must use large-scale forging equipment, which requires a large initial investment, and this process cannot produce claw poles with yokes, and an additional yoke must be equipped, resulting in an assembly air gap and increased magnetic resistance, which affects the generator. power

However, this process requires two heatings, and the production cost is relatively high

[0007] 4. Edge trimming process, the cold trimming process was used in the past. The temperature of the product after precision forging is 900 to 1000 degrees. The product must be loaded into the transfer box first. After the product is completely cooled, the product is poured out and trimmed. The consequences are: 1), precision forging is to assemble the box, turn over the box when cutting the edge, the product circulation time is long, the product is seriously damaged, and the logistics cost is high; 2), the product shear strength is high when the edge is cold cut, and the shear force Large, causing serious equipment damage and high maintenance costs; 3), loud noise during cold cutting

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