Abstract
1. For a lateral pressure p1/<- 2000 dyn/cm2, the thickness of the die wall should be δ = r1 2. For a lateral pressure p1 > 2000 dyn/cm2, the τd value is calculated by using the expression $$\delta = r_1 (3.35 \cdot 10^{ - 4} P_1 + 0.35).$$ 3. The radius of the contact surface between the inside bushing and the ring is determined by means of the expression [4] $$r_c = \sqrt {r_1 \cdot r_2 .}$$ 4. The necessary contact pressure is determined by using the following equation: $$Pc = P1 \cdot \frac{{a - 1}}{{2(a + 1)}}.$$ 5. The corresponding strain is $$\Delta = \frac{{P_1 }}{E}.2r_K ,$$ where E = 2.1 · 106 dyn/cm2 is the elasticity modulus (see steel dies) [4], 6. The elastic properties of dies influence the pressing process. With a reduction in the die's rigidity, the force necessary for ejecting the briquet from the die decreases, while the quality of the briquet's outside surface is improved (there are no longitudinal scratches).
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