Analysis of stress and strain of hydro-joining for the P/M cam and tube

Three-dimensional elastic-plastic finite element model was set up to study the hydro-joining process for P/M cam and tube. The distribution of the equivalent stress and residual contact pressure along axis and circumference direction were studied. The hoop strain distribution in the cam was analyzed after unloading. The hydro-joining experiment for P/M cam and steel tube were carried out and the hoop strain was measured during experiments. The comparison between the experiments and simulations verified the reliability of the simulation model. The non-uniformity of the stress and the distortion of the cam profile induced by stress are revealed as theoretical guidance for manufacturing assembled hollow camshaft with P/M cam.