The types of rolling machines vary depending on the field in which they are used. In terms of the number of rolls, it is divided into three-roller coiling machine and four-roller coiler. Three rollers are also divided into symmetrical three-roll coiling machine, horizontal downward three-stick coiling machine, arc downward winding machine, upper roller three-roller coiling machine, and hydraulic CNC coiling machine. From the transmission, mechanical and hydraulic types are divided. From the point of view of the development of the coiler, the upper roller type is backward, the horizontal downward type, and the arc is lowered. 1. The mechanical three-roller coiling machine is divided into symmetrical and asymmetric. Mechanical three-roller symmetrical Mechanical three-roller symmetrical coiling machine performance characteristics: the structure type of the machine is three-roller symmetrical, the upper roller performs vertical lifting movement in the symmetrical position of the two lower rollers, obtained by screw thread female worm transmission, the two lower rollers rotate, through the output gear of the reducer meshes with the lower roller gear to provide torque for the coiling plate. The disadvantage of this machine is that the end of the plate needs to be pre-bent with the help of other equipment. Mechanical three-roller asymmetric Mechanical three-roller asymmetric coiling machine main features: the machine structure type is three-roller asymmetrical, the upper roller is the main transmission, the lower roller vertical lifting movement, so as to clamp the plate, and mesh with the upper roller gear through the lower roller gear, and as the main transmission; the side roller for tilting and lowering movement, has the dual functions of pre-bending and winding. Compact structure, convenient operation and maintenance. 2. Hydraulic Hydraulic three-roller symmetrical coiling machine Main features: The upper roller of the machine can be vertically lifted and lowered, and the hydraulic transmission of vertical lifting is obtained by the hydraulic oil acting on the piston rod in the hydraulic cylinder; the lower roller is driven by rotation, and the output gear meshes through the reducer to provide torque for the coil, and the lower roller has a roller, and is adjustable