Influence of deformation load on forging process of aluminium piston skirt

摘要

Based on the rigid-plastic theory, the finite element method (FEM) equation which incorporates the influence of impact load and volume force is presented. The hammer forging theory for simulation is also given. On the basis of technological analyses, the piston skirt forging processes of LD11 aluminium alloy are simulated under both mechanical pressure forging and hammer forging conditions. By comparison with the metal flow, fibre flow lines, distributions of strain and temperature of the two forging methods, practical forging was carried out and the product quality was controlled. The deformation pattern of the piston skirt forging process was determined by comparing the simulation results with the practical forging results.