The cold upsetting extruding technology of hexagon flange head bolt and the comparition between it and hot upsetting technology are studied ,the die design on unit cold upsetting machine is introduced.

This article describes the key points of cold extrusion for P/M gears,concerning about equipment,the extruding head gears and the precision of the P/M gear blanks.

This article takes the nut of car wheel flange as an example,and compares with two forming techniques of this kind of parts,that is heat pressing and cold extrusion.

The cup head square neck bolts are made on the multiple station cold header,and cut squeeze technology is used to get the square neck.

Study on precise cold extrusion technology of 6061 Al-alloy splines shell;

Failure analysis on fissuring of high-speed steel cold extrusion die plate;

Design of cold extrusion die for axle sleeve with internal saw tooth;

We discuss the 3D cracks around cold-expanded holes and simulate their interference prestress release using the engineering software of ANSYS to study the effect of the interference prestress release on stress intensity factors(SIFs) at crack tips.

Based on the character of the extrusion working and the category of the extrusion forming,the shape、the dimension and the deformation degree of the tubular component with oral part having flange are analyzed.

And open-die forward extrusion is a more advanced way of deforming spline.