The principle of straightener is that three disks clamp round steel on both sides and pass straight. One side has a radius of R 1, and the other side must have two equal diameters with a radius of R2. Let the diameter of steel bars to be straightened be d, and adjust the center distance between steel bars to r1+R2+d.
It should be noted that the position of the straight line from the school can be adjusted according to the diameter of the steel bar, and R 1 and R2 can be the same diameter or different diameters.
In addition, in order to control the rebound, the actual adjustable center distance must be less than the above formula. Ensure that you can basically be in the first line after a slight rebound.