The invention discloses a full-automatic groove breaking 
necking machine. The full-automatic groove breaking 
necking machine structurally comprises a groove breaking 
necking pressing cylinder, a beamshrinking groove, a carrying lifting table, an 
electromagnetic valve seat, a 
relay, an 
electric control box and a transmission case. According to the full-automatic groove breaking necking 
machine, the groove breaking necking pressing cylinder is matched with the beam shrinking groove, so that a rotary threaded groove cleaning effect is formed, and steel fragments splashed during 
stamping neckingform a surrounding collection guide effect; a frame connecting rod forms a gradient type combined winding 
brush effect, so that impurities penetrating through the surface can be conveniently cleaned in the equipment 
stamping process, and the size precision of a 
pipe opening assembled in the later period can be conveniently adjusted; then a 
pipe opening fine adjustment frame is used for forming anannular frame longitudinal alignment correction effect on the 
stamping pipe opening, so that the longitudinal line distance and a rotary sliding 
brush form a combined linkage multi-axis motion effectthrough a 
bevel gear supporting frame, the 
stress point of a knife rest during groove breaking is improved, and a rotary unloading 
machining effect is formed; and the groove breaking sliding 
inertia is assisted to be pushed, so that the quality of a 
scaffold steel pipe machined by the whole groove breaking locking opening is improved.