Stacked double-cam numerical control self-centering center frame

The invention relates to the technical field of center frames, in particular to a stacked double-cam numerical control self-centering center frame. The stacked double-cam numerical control self-centering center frame comprises a machine body, the machine body comprises a shell and a machine body cover which are assembled and connected, and rotatable side arm assemblies are arranged on the two sides of the front end of the shell correspondingly; a cross arm is arranged in the shell, cams are fixedly arranged on the two sides of the cross arm respectively, the cross arm is driven by a driving assembly to do linear reciprocating motion, and the driving assembly is arranged inside the cross arm; each side arm assembly comprises a side arm, a roller A and a roller B are arranged at the rear end of each side arm, and rotatable supporting bearings are arranged at the front ends of the cross arm and the side arms; a double-layer curved surface is arranged on each cam and comprises a cam curved surface A and a cam cur