Cold forging forming method for three-dimensional hollow article

Abstract

A cold forging forming method for forming a three-dimensional hollow article without rough edges, wherein, an alloy of low melting point is used instead of mercury as a filler with plasticity. When the alloy of low melting point is heated and molten, it can be poured, discharged and recollected at normal temperatures but can have good stiffness after being solidified, thereby, the solidified alloy of low melting point can support a seamless die cavity against forging pressure, thereby, a stiff wall of the seamless die cavity is formed. A shaped work piece in the die cavity can be released when the solidified alloy is heated to melt, and an inner die for a different die cavity can be substituted for the old one, and an effect of recovery for reusing the filler can be achieved, and cost of forming can be reduced. All these meet the requirement of environment protection.

Dependencies are inferred from the claim text.