The contact mechanism for joint surfaces is important for predicting the loading process and dynamic properties of precision machinery products. A multiasperity model considering the lateral interaction and coalescence of contact regions with oblique asperity contact, the interacting and coalescing Hertzian asperities (ICHA) model, is introduced in this work. Contact angle $\alpha$ and radius of curvature $R(r)$ are vital parameters that are directly calculated based on grid points measured from the milling and grinding surfaces. Numerical simulations of $\alpha$ and $R(r)$ were analysed. The results show that the proposed model is more effective at improving the contact area versus force relationship than various asperity models for low and middle contact forces. $\alpha$ and $R(r)$ follow a Gaussian distribution. Because of the existence of coalescence, they decrease with increasing contact force. Furthermore, the $\alpha$ and $R(r)$ in the startup phase are crucial data that can be used to judge the effects of oblique asperity contact. They are greatly influenced by fractal dimension $D$ and fractal roughness G. From the comparisons with the surfaces generated by Weierstrass-Mandelbrot function, it is suggested that to obtain an accurate contact prediction in the loading process, oblique contact is as important as lateral interaction and coalescence.

关节面的接触机制对于预测精密机械产品的加载过程和动态特性具有重要意义。在这项工作中介绍了一种考虑横向相互作用和接触区域与倾斜粗糙接触的合并的多粗糙模型，相互作用和合并赫兹粗糙 (ICHA) 模型。接触角$\alpha$ 和曲率半径 $\mathrm{电阻}(r)$是根据从铣削和磨削表面测量的网格点直接计算的重要参数。数值模拟$\alpha$ 和 $\mathrm{电阻}(r)$进行了分析。结果表明，所提出的模型在改善接触面积与力的关系方面比针对中低接触力的各种粗糙模型更有效。$\alpha$ 和 $\mathrm{电阻}(r)$服从高斯分布。由于聚结的存在，它们随着接触力的增加而减少。此外，该$\alpha$ 和 $\mathrm{电阻}(r)$在启动阶段是可用于判断斜凹凸接触效果的关键数据。它们受分形维数的影响很大$D$和分形粗糙度G。通过与 Weierstrass-Mandelbrot 函数生成的表面的比较，建议在加载过程中获得准确的接触预测，斜接触与横向相互作用和聚结一样重要。