対向液圧を用いた硬軟質薄板材のプレス成形に関する研究
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This paper describes the optimum deep drawing conditions: various shaping parameters of radius of the shoulder of punch, radius of the shoulder of the black holder, radius of the shoulder of the die, an hydraulic counter pressure and a lubricant, in deep drawing by the hydraulic counter pressure of sigle-layer of the titanium, aluminium, stainless steel, brass, two layer clad materials of the titanium and alminium. Limiting Drawing Ratio (LDR) has improved 20%〜30% by using the hydraulic counter pressure compared with the common deep drawing. LDR of titanium became 2.83 by using the counter liquid and the polyethylene eat. LDR of aluminium, stainless steel, and brass became 2.0, 2.40, and 2.60 respectively. Using the hydraulic counter pressure, we should choose the suitable shoulder radius that comes to obtain the breaking controlling effect easily. Deep drawing of two layer clad metals should arrange the higher material with tensile strength and elongation percentage on the outside of the forming metals.
- 2009-10-30
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