Gearbox differential case forging process introduction

The gearbox differential case has a complex shape and is difficult to forge.

The gearbox differential case is an important part of the car. Its shape is complex. There are 8 petals on the outside for the screw-fixed bosses and the corners of the bosses are smaller. The inside of the forgings is a large drop and the transition fillet is very The small step deep cavity, high dimensional accuracy and shape tolerance requirements, poor forging process performance, in order to improve the quality of the differential housing and die life, introduce the forging process of the gearbox differential case.

Firstly, the temperature change and wear of the mold should be considered in the forging process. During the forging process, the metal rubs the surface of the cavity vigorously, so that the wear speed of the mold is faster. From the analysis results, the flow law of the metal in the forging step should be changed. Reduce the wear rate of the mold and the increase of the surface temperature, improve the finishing process of the mold, improve the processing level of the corner fillet, completely remove the ablation layer of the EDM surface, delay the cracking speed of the mold under the thermal stress, and improve the cooling method of the lubricant. Choose a more reasonable spray lubrication process, do a good job in equipment maintenance, on the one hand, do the surface cooling of the upper and lower molds, on the other hand, make the surface cooling as uniform as possible, avoid local cooling too fast, appear excessive thermal stress, delay the mold as much as possible Cracking.