Multi-Stage Forming Analysis and Experiment of Flange Sleeve
摘要
The study assumes constant shear friction to carry out 6-stage the finite element forming simulations, the 5-stage forging forming and 1-stage piercing forming are simulated to obtain the dimensions of dies by Deform 3D FEM analysis software. The effective stress, the effective strain, the velocity field and the forging force in each stage can be obtained. In each stage, the realistic multi-stage forging has been performed to compare the product dimensions with the stimulation results to verify the acceptance of FEM analysis model. The similarity reaches over 95%. With a view to realizing the stress distribution of dies, especially explore the circumferential stress, the radial stress, and the effective stress of inner mold, the outer mold, and the stress ring occurred by single fit interference and the stress ring fit interference. Furthermore, checking whether the effective stress of die occurred exceeds the allowable yield strength of die material to avoid the die failure. The research results proposed have of great important influence to the fastener industries.