Numerical Stimulation and Analysis on Defect in the Upset-extruding Process of Hollow Products;

By the analysis and comparison of upsetting extrusion and cold forging technology,the upsetting extrusion technology on the countersunk square neck bolt is introduced in the paper.

Based on summing up different kinds of technological process of precision forging of spur gear,a new upsetting extrusion process and pattern die are designed.

For a heavy forging with bulge,the upsetting-extruding process can be adopted.

Owing to the disadvantages of the traditional process of austenitic stainless steel neck flange with a large hole,a new upsetting-extruding process with tubular billet was presented.

Numerical simulation of extrusion process of AZ31 magnesium alloy tubes;

Numerical simulation of the extrusion process by an adaptive element-free galerkin-finite element(EFG-FE) coupling method

All the methods for analyzing food extrusion process fall to 6 classes,two of which,residence time distribution(RTD) analysis and rheology analysis are presented in this paper.

After establishing the model of SPC,the control system of plastic extrusion process was developed.

The functional relation between the extrusion process temperature and shear stress and shear rate of the selected compounds for tire and hose was gained by determining their rheological properties The theoretical basis for changing the compounds viscosity of extrusive process by means of temperature or shear rate was put forwar

The dynamic extrusion process of PP/CaCO3 and LDPE/CaCO3 in the electromagnetic dynamic plasticating extruder was studied, and the effect mechanism of vibration force field on the extrusion process of filled polymer system was discussed.