Casting process for heavy truck differential housing

Abstract

The invention discloses a casting process for a heavy truck differential housing. In the casting process, a casting system, a sand mold cavity and a sand core are involved, wherein the sand core is fixedly arranged in the sand mold cavity, the casting system is provided with at least one inner sprue, the tail ends of the inner sprues are fixedly connected with the sand mold cavity, a groove is formed in the upper surface of the sand core in a concave mode, a riser is arranged in the groove, the upper end of the riser is located above the sand core, the riser at least comprises two riser unitswhich are independently arranged, at least one riser neck is arranged on one side of the lower end of each riser unit in an outward mode, a heat preservation and heating riser sleeve comprises at least two independent hollow cavities, the heat preservation and heating riser sleeve is buckled above the riser and is bonded with the side wall of the groove of the sand core, through holes communicating with the riser necks are formed in the sand core, and at least one hollow riser neck is further arranged on the heat preservation and heating riser sleeve. According to the casting process, the costcan be better reduced, and the efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of casting processing, in particular to a casting process for a differential case of a heavy-duty truck. Background technique [0002] The structure schematic diagram of the heavy truck differential housing is shown in the attached drawing of the manual figure 1 and accompanying drawings figure 2 shown. The automobile differential is the main part of the drive axle. Its function is to allow the two axle shafts to rotate at different speeds while transmitting power to the axle shafts on both sides, so that the wheels on both sides can run at unequal distances in the form of pure rolling as much as possible. Reduce the friction between the tire and the ground. The differential housing is the main body of the differential, and its functions are as follows: 1. Place the cross shaft or a straight horizontal shaft; 2. Keep the transmission axis between the differential and the rear axle driving wheels unchange...

AI Technical Summary

Problems solved by technology

[0003] Due to the complex structure of the differential housing, there are many isolated thermal nodes, and the material is ductile iron, the tendency of shrinkage is relatively large. However, the traditional process of casting production is to use horizontal molding lines or vertical molding lines. Multiple sand risers feed the castings, the process yield of castings is basically about 50%, and the cost of castings is relatively high

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