剖分坎合是钢丝缠绕液压机的关键技术，坎合副的抗剪性及其抗疲劳性对模锻液压机使役期间保持机架完整性至关重要。坎合原理及抗疲劳性方面研究工作的不足限制了该技术的推广和应用。设计坎合疲劳试验夹具，对液压机本体小试样坎合结构进行切向等幅循环载荷疲劳试验。分析坎合结构切向循环载荷条件下三个阶段的载荷-位移循环特性；建立坎合结构疲劳指数模型，当载荷比R=0.1时，坎合结构疲劳量纲一载荷极限为 =0.74；研究量纲一切向载荷幅值与均值 关系，得到坎合结构疲劳等寿命曲线；提出基于Miner线性累积损伤理论的坎合结构疲劳累积损伤准则。实现了钢丝缠绕模锻液压机坎合结构的安全性评估和寿命预测。

The bumpy ridge joining is the key technology of the heavy die forging press with steel wire wound.The shear resistance and the fatigue resistance of the bumpy ridge pair are vital to the integrity of the frame during service. The use of the technology is limited due to the deficient research on the principle of the bumpy ridge joining and the fatigue resistance of the structure. A set of clamp was developed to test the structural fatigue of the bumpy ridge joining, by which groups of fatigue tests of constant amplitude cycle tangential loading were performed．The cycle characteristic of the load-displacement of the bumpy ridge joining under the cycling tangential load is studied and the exponential model of the structural fatigue is established, the dimensionless fatigue load limitis 0.74 when the load ratio R is 0.1. The relation between dimensionless amplitude value and mean value of the tangential load is studied to get the fatigue constant life curve, as well as a criterion of bumpy ridge structural damage accumulation is established based on Miners theory. The safety evaluation and fatigue life prediction are implemented for the bumpy ridge structures of the heavy die forging press with steel wire wound.