Straightening machine is a device for straightening metal profiles, rods, pipes, wires, etc. The straightening machine changes the straightness by pressing a bar or the like with a straightening roller. There are generally two rows of straightening rollers, varying in number. There are also two-roll straightening machines, which rely on the change in the angle of the two rolls (concave in the middle, hyperbola roll) to straighten materials of different diameters. The main types are pressure straighteners, balance roll straighteners, shoe roll straighteners, rotary reverse bend straighteners and so on.
The position of the rollers is at an angle to the direction of movement of the straightened product. Two or three large ones are active pressure rollers, which are rotated by the motor in the same direction. The other small rollers on the other side are driven pressure rollers. It is rotated by the friction of a rotating round rod or pipe. In order to achieve the compression required by the rollers for these products, these small rollers can be adjusted forward or backward simultaneously or separately. Generally, the more the number of rollers, the higher the accuracy of the product after straightening. After being bitten by the roller, the product continuously performs linear or rotary motion, so that the product can withstand various aspects of compression, bending, flattening and other deformations, and finally achieve the purpose of straightening.