A kind of forging forming method of triple gear, triple gear and application thereof

Abstract

The invention discloses a forging forming method of a triple gear. A pre-treatment process and a forging process are adjusted and a forging mold is optimized, so that the procedure of repeated descaling in a forging process is reduced, and the percent of pass of the tooth surface roughness of the triple gear can be effectively improved; meanwhile, top conical teeth and bottom surface end teeth aresimultaneously forged and formed in the forging process, the stability of the structure of the triple gear is guaranteed, the material utilization rate is improved, and the time and the tool cost ofmilling machining the end teeth are saved, and the anti-fatigue strength of the end teeth is improved. The forging forming method of the triple gear enables the surface of a whole product to be uniform and consistent, the quality stability is improved, the technological steps are optimized, the production time is effectively shortened, the production efficiency is improved, and huge economic benefits are achieved; the triple gear manufactured by the forging forming method is high in quality stability, and the consistency of the surface roughness and the tooth surface precision after the forging are good; and large-scale batch production can be realized.

Description

technical field [0001] The present invention relates to the technical field of gear forging, in particular, more particularly, to a triple gear forging forming method, triple gear and application thereof. Background technique [0002] Triple gear is a mechanical device widely used in the automotive industry to achieve axial connection and used for automobile axles. The top bevel gear part of the triple gear meshes with the planetary gear. The big end of the top bevel gear 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 top bevel tooth part is poor, and the precision of the tooth part is poor. Shot peening is performed to clean the scale, and then heated to about 800°C for warm forging. Due to the two heatings, energy consumption is large, the production cycle is long, and the precision and roughness of the teeth are still diffi...

AI Technical Summary

Problems solved by technology

[0002] Triple gear is a mechanical device widely used in the automotive industry to achieve axial connection and used for automobile axles. The top bevel gear part of the triple gear meshes with the planetary gear. The big end of the top bevel gear 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 top bevel tooth part is poor, and the precision of the tooth part is poor. Shot peening is performed to clean the scale, and then heated 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.

However, the process of removing scale by steel brush and air blowing requires manual operation, and there are many uncontrollable factors in the removal of scale, and it is difficult to perform manual descaling in the forging process.

It is difficult to effectively guarantee the uniformity and controllability of the tooth surface roughness of triple gear products. Although the subsequent cold shaping can improve the tooth roughness and tooth precision, it cannot deal with the oxidation defects with a depth of more than 0.1mm produced during forging. Repaired, resulting in several percentage points of defective products need to be accepted by concession, manually polished or even scrapped; and the production efficiency is not high, and the cost investment is relatively large

[0004] In addition, in the forging process of the existing triple gears, the top bevel teeth are precision forged first, while the end teeth and sides of the bottom surface need subsequent processes such as milling or pulling teeth.

Especially the end teeth on the bottom surface need to be processed by a machining center. It takes about 15 minutes to process one piece and costs more than 5 yuan.

After searching, no process of forging the top bevel teeth and bottom end teeth of the triple gear at the same time was found.

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