The computing formula of the two technology data,that is the technology deforming data “n” and every deforming degree “ε hn ”,can be deduced from the basic definition formula of the free compression deforming degree,its application method is mentioned.

Base on the method of numerical simulation,both free cold forging and opened cold forging of shaft with boss were analyzed.

Methods and FE Simulation of Improving Quality of Upsetting;

Compare and Analyse of Unit Deforming Force and Boundary Conditions in Model Element of Cylinder Upsetting;

Study on the law of temperature influence on brass upsetting microforming;

Engineering application of the upsetting straight thread bar’s connection technique;

Effect of annealing temperature on microstructure and transverse ductility of upset pure Mo bars

The deformation extent of metal decreases from top to bottom along longitude direction during upset and changes into cylinder,accumulating deformation exists during processing,the shape phenomenon is not observed and the ove.