Generator magnetic pole precision forging method

Abstract

The present invention relates to a dynamo magnetic pole finish forging and forming method. Said method includes the following steps: (a), blanking raw material and cutting raw material into material part; (b), preforging, placing the material part into heating furnace, heating to predefined temperature 1000-1200deg.C, preforging the material part in the preforging die to obtain the preforged piece, its heating time is 30-90 sec. the lower portion of said preforged piece is circular cylinder body and the upper portion of said preforged piece is conical body; (c). forging the preforged piece in a closed precision hot forging die to obtain forged piece, its forging temperature is 1150-950deg.C and forging time is 4-10 sec.; (d). edging forged piece; and (e). machining said forged piece to obtain the dynamo magnetic pole product.

Description

technical field [0001] The invention relates to a method for precise forging and forming of a magnetic pole of a generator. Background technique [0002] The magnetic pole is the key to the generator, and the magnetic pole needs to reduce the mass as much as possible on the premise of ensuring the high output power of the generator. The shape of the magnetic pole is complex, and the geometric accuracy of the six pole claws is strictly required, and no errors are allowed. The traditional forming methods of magnetic poles mainly include casting forming and ordinary forging forming. Among them, the generator magnetic pole produced by the casting forming process has defects such as looseness, shrinkage cavity, and segregation in the internal structure, which reduces the electromagnetic performance of the magnetic pole and is difficult to meet the performance and quality requirements. The process of manufacturing magnetic poles by ordinary forging forming methods is: 1). Cuttin...

AI Technical Summary

Problems solved by technology

Among them, the generator magnetic pole produced by the casting forming process has defects such as looseness, shrinkage cavity, and segregation in the internal structure, which reduces the electromagnetic performance of the magnetic pole and is difficult to meet the performance and quality requirements

The process of manufacturing magnetic poles by ordinary forging forming methods is: 1). Cutting, 2). Heating, 3). Upsetting, 4). Pre-forging, 5). Final forging, 6). Cutting burrs, 7). Mechanical processing, although this method has greatly improved the internal structure and performance quality of the magnetic pole, it still has the disadvantages of long manufacturing process and high production cost.

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