Casting technique of balance shaft bracket

Abstract

The invention provides a casting technique of a balance shaft bracket. The technical core of the casting technique is that a casting system is arranged, that is, a one-die two-part structure is adopted, two balance shaft bracket models are symmetrically arranged, an ingate extending up and down is arranged on the side of a balance shaft connecting part with a V-shaped structure of each balance shaft bracket model, and three inner gates are formed in the lower surface of the ingate, and are directly connected with the balance shaft bracket models; then, the ingate is connected with a horizontal sprue, a straight sprue and a sprue cup; and feeding risers are separately arranged at two ends of a frame connecting part of each balance shaft bracket model. A lateral casting way is adopted, and through dispersed casting of the upper inner gate, the middle inner gate and the lower inner gate and the advantages of lateral casting and bottom casting, the cast balance shaft bracket casting has no defects of sand holes, included slag, sinkholes and shrinkage porosity; and moreover, the one-die and two-part structure is adopted, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a balance shaft suspension, in particular to a casting process method for a balance shaft support of the balance shaft suspension. Background technique [0002] Experiments have shown that if the weight of the vehicle is reduced by 10%, the fuel efficiency can be increased by 6%-8%. For every 100kg reduction in curb weight, the fuel consumption per 100 kilometers can be reduced by 0.3-0.6L. Reduce the self-weight of heavy trucks, reduce fuel consumption, reduce harmful substance emissions, save weight-based charges, increase load utilization coefficients, and increase transportation profits. After the weight of the car is reduced, the center of gravity of the car body can be lowered, and the driving of the car is more stable and comfortable. Lightweight can reduce rolling resistance, acceleration resistance and climbing resistance, and can also create conditions for realizing high power. [0003] The balance shaft suspension ...

AI Technical Summary

Problems solved by technology

The existing balance shaft support usually adopts sand casting method, and the castings are prone to shrinkage cavity and shrinkage defects

[0005] In order to overcome the defects of shrinkage cavity and shrinkage porosity in castings, the lost foam casting process has been used to produce balance shaft brackets. The top pouring gating system is used. The inner runner is located on the upper part of the casting model, and the molten metal is poured from the upper part; The molten metal in this pouring system has a large impact on the bottom of the mold, and the contact area between the molten metal and the air is large. The molten metal will cause splashing and oxidation, and it is easy to produce trachoma and slag inclusion defects.

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