The clamping mechanism is the working mechanism of this machine. Under the drive of the cylinder piston, the sleeve performs reciprocating motion, continuously tightening and releasing the spring-loaded head mounted on the fixed plate guide sleeve. The assembled pipe head, outer casing, and mandrel are placed into the central circular hole of the spring-loaded head. By starting the motor, oil pump, and control valve, the cylinder plunger moves, and through the sleeve with a conical inner wall, it tightens the outer wall of the spring-loaded head with the same conical shape, achieving the purpose of bonding. After reversing, the sleeve moves in the opposite direction, the spring-loaded head returns to its original position, and the high-pressure hose connector is removed.