The roll bender continuously bends the material according to the principle that three points determine a circle. The three-roll roll bender has two drive rolls (fixed) and one adjustment roll (adjustable). The adjustment roller can move forward or backward, which is convenient for unloading the workpiece. Adjust the up and down (front and rear) position of the adjustment roller to change the relative distance between it and the drive roller. When bending, place the material between the drive roller and the adjusting roller, adjust the adjusting roller to gradually press down (advance), and then bend the material to the required radius (radian) According to the bending curvature, it can be divided into equal curvature roll bender and variable curvature roll bender; According to the classification of structure design, it can be divided into vertical roll bender and horizontal roll bender; According to the number of rolls, it can be divided into three-roll bending machine, four-roll rolling machine, six-roll rolling machine, etc.

Many people don`t know how to distinguish between the stretch bending machine and the roll bending machine, and how to choose between the two. In fact, the difference between the two is very large, and the overall concept and principle are different. This mainly depends on what product the user wants to make , let`s popularize the basic principles and usage plans of the two first. Definition: Stretch bending machine: After changing the extension of the profile, it pulls the deformation point of the profile and leans on the template to form an arc. The process methods include template rolling, tension adjustment, extension calculation, rebound calculation, stretching speed, boom angle, single-arm stretch bending , arms bent. Roll bending machine: It is a kind of cold bending equipment for metal profiles, and it is a commonly used bending machine for aluminum alloy profiles, such as angle steel, channel steel, I-beam, metal square tube, metal round tube and various metal special-shaped profiles. Machinable shapes are circle, arc, ellipse, parabola and so on. It can be divided into vertical and horizontal, easy to operate, low cost, suitable for cold bending of small and medium-sized profiles. Application: Stretch bending machine: aluminum doors and windows, automobile luggage racks, automobile high-speed rail structural parts, elevator handrails, yacht structural parts, stainless steel pipes for bathrooms, etc., widely used in high-speed trains, automobiles, ships, large buildings, bridges, wind power, aviation and other high-end fields . Roll bending machine: used in the production of circular flanges in automobiles, aerospace, rail transit elevators, conveying guide rail