In order to verify the feasibility and universality of the proposed process design improvement method, three typical steel castings produced according to the traditional process design method were selected for application analysis and verification.
The name of steel casting is shell, and the number of steel casting is 136-18-03001. This product is a newly developed new type of bulldozer accessories, and no internal defects were found in the first trial production. During the second trial production, the steel castings were transferred to the machining branch after the completion of the production. During the machining of the steel castings, it was found that there were casting defects on the machining surface. After the defect investigation of the steel casting by the technical and inspection department, it is determined that the defect is shrinkage defect. Figure 1 shows the photos of defective products, and Figure 2 shows the local photos of casting defects.