A cold forging forming method for forming a three dimensional hollow article without rough edges, wherein, {TAIL ~ an alloy} of low melting point is used instead of {HEAD ~ mercury} as a filler with plasticity 
A cold forging forming method for forming a three dimensional hollow article without rough edges , wherein , { TAIL ~ an alloy } of low melting point is used instead of { HEAD ~ mercury } as a filler with plasticity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH