Residual Contact Pressure And Elastic Recovery Of An Assembled Camshaft Using Tube Hydroforming

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. (C) 2021 CIRP.