Page 87 - Module DMV20173
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4.0 BULK DEFORMATION PROCESSES
4.4.7 CRITERIA OF DIE DESIGN
1. The die is usually a piece of steel with the shape of the desired part machined into it.
2. Very tight tolerance.
3. Correct die geometry from the beginning.
4. Carefully finish the land surface.
5. Proper design (giving maximum die life).
6. Rational production resulting in low die manufacturing cost.
4.4.8 DIFFERENCE BETWEEN GOOD AND POOR DIE
1. Figure 4.23 shows several characteristics that explain the differences between poor
and good die.
2. Some of the criterias required for a good dies are eliminating sharp corners and
keeping section thicknesses uniform.
Figure 4.23 The differences between poor and good die.
5.4.9 TYPICAL DIE OF EXTRUSION
Typical dies for extrusion processes are shown in Figure 4.24. Some of them are:
a) Die for nonferrous metals.
b) Die for ferrous metals.
c) Die for T-shaped extrusion.
BPLK 119 DMV 20173
