Kinematic and finite element analysis of upsetting process by slider-crank mechanism

Abstract

Upsetting process is a typical large plastic deformation technology, and it is driven by traditional slider-crank mechanism. By theoretic calculation, the relations of the slide displacement, velocity and acceleration with the crank degree are studied. Their variation laws with time are researched by kinematic analysis of UG NX software. Based on the upsetting process character, a numerical model is established. The numerical simulation of the upsetting process is conducted by DEFORM software. The deformation, distribution and development trend of equivalent stress, equivalent strain and equivalent strain rate during the upsetting process are predicted. The load-time curve of the punch in X and Z direction is obtained too. The results are accordance with the actual manufacture situation, and they are guidable to the optimization of the process parameters. (4 pages)