The assembled camshaft is a recently developed split assembly technology that enables the realization of lightweight cars and improves engine performance. Residual shaft–cam contact pressure is affected by camshaft elastic recovery and affects connection quality. This study investigated a cam with an isometric–trilateral profile for tube hydroforming with a hollow shaft via experiments and finite element analysis. A novel, indirect residual contact pressure measurement method is herein proposed. Hydraulic parameter effects on residual contact pressure and elastic recovery were analyzed using the theory of plastic mechanics. For hydraulic pressure below 85 MPa, increasing hydraulic parameters increased residual contact pressure nearly linearly while decreasing elastic recovery.

组装后的凸轮轴是最近开发的分体式组装技术，可实现轻型汽车并提高发动机性能。凸轮轴弹性回复会影响轴与凸轮之间的残余接触压力，并影响连接质量。这项研究通过实验和有限元分析研究了具有等距-三边形轮廓的凸轮，用于空心轴的管液压成形。本文提出了一种新颖的间接残余接触压力测量方法。利用塑性力学理论分析了水力参数对残余接触压力和弹性回复的影响。对于低于85 MPa的液压，增加液压参数会几乎线性增加残余接触压力，同时降低弹性回复率。