Process characteristics：The end face of the casting is integrated with the gear chamber structure, and the end face of the gear chamber is 146mm higher than the side face of the cylinder block. It is a thin-walled high-strength casting. In the whole production process, robot is used for coring, core assembling, dip-coating and core setting to improve the dimensional accuracy of thin-wall castings. The molten iron of high-designation material has a large shrinkage rate, and the gear chamber is prone to porosity and shrinkage porosity defects. MAGMA casting simulation software is used to simulate, optimize the casting process, improve the pouring system, increase the temperature of the cover box surface, etc., and no porosity or shrinkage cavity defects appear in the production of castings.