This model is composed of main motor, reducer, herringbone gear box (steel parts), cross universal joint shaft (matching shaft bracket), hydraulic quadrangular pyramid expansion and contraction coiling machine on the left and right of the working machine base, and thickness gauge technology. The gantry and roller device (the thickness gauge is self-equipped), adopts the Italian Ansaldo second bridge four-quadrant field weakening system device, analog constant tension control method, and the relay system control adopts programmable control PLC (ie Siemens S7- 200) and other components, the roll system adopts the special bearing shaft seat of the rolling mill, with a roll changing device, and the worm gear pair is pressed down as a secondary enveloping surface. The material of the roll is 9Cr2Mo.