中文摘要：

针对自主研发的金属内腔挤压成型机，按传统油缸设计理论对短行程主油缸部件尺寸计算，并运用有限元方法与理论计算进行验证和优化。与理论计算相比，短行程油缸外缸体的最大应力小28％，最大变形小34％，内缸体的最大应力小19％，最大变形小35％。将高压液压油密闭在更短的行程内，油缸主密封尽可能接近油腔体可有效减小油缸部件的应力应变，提高油缸的使用寿命。

英文摘要：

The short-stroke main hydraulic cylinder parts of the homemade metal inner cavity squeeze forming machine were calculated according to the conventional formula. It was also validated and optimized using FEM. The maximum von mises, maximum deformation, maximum von mises, and maximum deformation of short stroke cylinder outer cylinder was less 28% ,34%, 19%, and 35%, respectively. The high-pressure hydraulic oil was sealed in a shorter stroke, the cylinder seal stress and strain would be reduced to improve the service life of the cylinder.