Numerical-control processing method of rolling-forging die cavity

The invention discloses a numerical-control processing method of a rolling-forging die cavity, belonging to the die technical field by using roll forging, performing and finishing forging. The invention mainly solves the problems of poor processing quality and efficiency of a rolling-forging die cavity in the prior art. The method of the invention is characterized in that 1) the characteristic overall dimensions of the product are obtained according to product images, and UG software is input correspondingly to obtain the straight cavity images of the rolling-forging die cavity; 2) a horizontal numerical-control machine with a rotary working table is adopted to input die cavity radius and rolling round direction parameters into the UG software so as to obtain the four-axle linkage numerical-control processing procedures of the rolling-forging die cavity of which the parting surface is in circular arc shape; 3) a phi32-35 cutter is chosen to carry out numerical control rough mill; 4) a phi16-10 cutter is used