■TMA-professional Plate Roll Machine is widely used in chemical industry, Cement, shipbuilding, boiler, aviation, water control project, Power Transmission Tower, metal structure and the industry of making machinery. Its working principle is rotating bending deformation. For the upper roller can be moved no matter up and down, but also horizontally, so no need additional press or equipment, can realize bending, as well as correction of the workpiece.■ The machine adopts 4-roller symmetrical structure with the upper roller moving vertically in the center between the three lower rollers, which is achieved through the drive of the screw, the unt, the worm and the lead screw