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为了提高组合凹模的弹性强度极限和疲劳寿命,将自增强理论应用于双层组合凹模设计,尝试对线性强化材料模具的自增强过程进行理论解析。采用Msc.Marc有限元软件进行模拟计算,模拟与解析结果一致性良好。在此基础上,分析不同强化模量系数对自增强处理效果的影响,分析结果表明,凹模内侧的周向残余应力随着强化模量系数的增大明显减小;与传统组合凹模相比,自增强处理后的组合凹模内侧的周向残余应力显著提高,可以大幅降低模具内壁开裂的可能性。
In order to improve the elastic strength limit and the fatigue life of the composite die, the self-reinforcement theory is applied to the design of the double-layer composite die, and the theoretical analysis of the self-reinforcement process of the linear reinforcement die is attempted. Msc.Marc finite element software was used to simulate the simulation and analysis of good consistency. On this basis, the effect of different strengthening moduli on the self-reinforcement effect is analyzed. The results show that the residual stress in the inside of the die reduces obviously with the increase of the modulus of elasticity. Than the self-reinforced composite die inside the circumferential residual stress significantly increased, can greatly reduce the possibility of mold wall cracking.