To solve the problems of large inner fillet at the bottom and the cracking of heading punch after heading of cartridge case,a set of multi-objective optimization design method for the indenting-heading process parameters of cartridge case was proposed.Firstly,using center composite experiment method,the experimental design was carried out with the convex height of indenting ejector,fillet of indenting ejector,cone angle of indenting ejector and web thickness of indenting of cartridge case as the design variables,the maximum effective stress of indenting ejector,the maximum effective stress of heading punch and inner fillet at the bottom of the cartridge case as the optimi-zation objectives,SVR and GWO algorithms were combined to construct the optimization model of indenting-heading process parameters of cartridge case.Secondly,MOPSO algorithm was used to search for optimization in the feasible region,and combined TOPSIS and CRITIC to build a comprehensive evaluation index to calculate the best combination of process parameters.Finally,the numerical simulation and process experiment were carried out with the combination of optimized process parameters.The results show that the simulation results are consistent with the experiment results,and the inner fillet at the bottom of the cartridge case is full,and the heading punch fracture failure can be avoided.
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