Extruding Dies                                                                                                                             Close Extruding Dies

In extruding dies when material flow diameter to be reduced . Almost in these dies diameter and lenght to reach final size. The impact pressure on die is becoming less than header dies .  But the wear rate is very high, especially in the angle and arc extruded. in Close extruding dies Changing diameter greater than conventional extruders.In these terms, the maximum wear at arc is created.in place of extrude arc used Tungsten carbide is the most abrasion resistance.

Technical Note

Hot work tool steel selection

Heat treatment salt furnaces in order to achieve tempered martensite steel structure and hardness of Rockwell C with an accuracy of 1

CNC turning with an accuracy of 0.1 mm

Select the appropriate grade tungsten carbide for extruding die

Grinding with accuracy of 5 microns

work done the best shrink-fit calculation for steel hardened and tungsten carbide.

getting a piece as modle and resolve likely problems . 

The final polishing with an accuracy of 1 micron