In order to verify the feasibility of casting process, the sample of open axle housing was trial produced according to the semi closed casting process.
Through multiple rounds of production, the first batch of 2 pieces and the second round of 8 pieces were all equally divided into 10 cm for verification. As shown in the figure, the original defect parts and key parts were inspected with a 10 times magnifying glass. It was found that there was no visible crack inside the product, and no hole with a diameter of more than 3 mm was found. After five batches of production, a total of 630 axle housing pieces were produced. According to the sampling proportion, 2 pieces were taken from every 100 pieces for equal distance cutting, and 31 pieces of axle housing were cut, and no defects were found.