Manufacturing method for triple gear

Abstract

The invention relates to a manufacturing method for a triple gear. The method comprises the steps that a metal rod is selected, the length of the rod is worked out according to the weight of the triple gear, the rod is put into a medium-frequency induction heating furnace and heated, the heating temperature ranges from 1,100 DEG C to 1,180 DEG C, then upsetting, pre-forging and final forging are conducted for forming, and descaling and oxidation prevention are included in the forming process; then shot blasting cleaning is conducted, and the surface of a workblank is coated with a lubricant; and the lubricated triple gear workblank is put into a finishing die, the cold reshaping process is conducted, normal-temperature reshaping is conducted on a conical tooth part of the triple gear, and the triple gear is formed. By the adoption of the manufacturing method, the operation is convenient, the quality of products is stable, the degree of finish of the tooth surface reaches over 1.6, the tooth portion accuracy reaches over the level 6 specified in the DIN standard through reshaping, no machining is needed for the conical tooth part, only one-time heating is needed, the production cycle is short, the efficiency is high, energy and materials are saved, the operation is convenient, and the product accuracy is high; and an existing manufacturing method of machining or multi-fire forging of the triple gear is changed thoroughly.

Description

technical field [0001] The invention relates to a method for manufacturing triple gears, belonging to the field of gear manufacturing. Background technique [0002] At present, triple gears are widely used in the automotive industry to realize axial connection and be used for automobile axles. The bevel teeth of the triple gears mesh with the planetary gears. The large end of the bevel gears is closed and cannot be processed by gear planing. , in the process of processing, precision forging is generally used, but due to the oxidation in the forging process, the surface roughness of the bevel tooth part is poor, and the precision of the tooth part is poor. Usually, the process adopts two-fire forging, forging and forming first, and then surface treatment Shot blasting cleans the scale, and then heats to about 800°C for warm forging. Due to the two heatings, the energy consumption is large, the production cycle is long, and the precision and roughness of the teeth are still di...

AI Technical Summary

Problems solved by technology

[0002] At present, triple gears are widely used in the automotive industry to realize axial connection and be used for automobile axles. The bevel teeth of the triple gears mesh with the planetary gears. The large end of the bevel gears is closed and cannot be processed by gear planing. , in the process of processing, precision forging is generally used, but due to the oxidation in the forging process, the surface roughness of the bevel tooth part is poor, and the precision of the tooth part is poor. Usually, the process adopts two-fire forging, forging and forming first, and then surface treatment Shot peening to clean the oxide skin, and then heating to about 800°C for warm forging. Due to the two heatings, the energy consumption is large, the production cycle is long, and the precision and roughness of the teeth are still difficult to achieve the ideal state.

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