本文用有限元法分析了J23—100曲柄压力机铸铁安全块的应力。在安全块接触面上外力分布规律未知的条件下,用位移摄动的方法,得出了安全块接触面上压应力的分布规律。根据计算和实验结果,提出了铸铁安全块的一种新的破坏观点。这种新观点对我国现有的大量中小型曲柄压力机的技术改造有一定的指导意义。 In this paper, the finite element method is used to analyze the stress of cast iron safety block of J23-100 crank press. Under the condition of unknown external force distribution on the contact surface of safety block, the distribution of compressive stress on the contact surface of safety block is obtained by the method of displacement perturbation. According to the calculation and experimental results, a new destructive viewpoint of cast iron safety block is proposed. This new view of our country a large number of small and medium-sized crank presses technical transformation has some guiding significance.