Plate Rolling Process
Used when large radius bends or curves are required, this method passes a piece of matel sheet (plate) through a series of three or four rollers to achieve the desired curve.
Plate Roll Bending Equipment
The plate roll bending machine is based on the principle of three points to determine a circle, and continuously bends the slab.
Commonly used roll bending equipment is 3-roll plate bending machine and 4-roll plate rolling machine, plate bender also called plate roller.
3-roll bending machine
The three-roller plate bending machine has two driving rollers (fixed) and a pressing roller (adjustable). The relative distance between the pressing roller and the driving roller can be changed by adjusting the upper and lower positions of the pressing roller.
When bending, the plate is placed between the driving roller and the pressing roller, and the driving roller rotates in the forward and reverse directions to make the plate reciprocate. By adjusting the pressing roller to gradually press it down, the plate can be bent into a cylindrical surface with a required curvature, a conical surface and a hyperboloid with a smaller curvature. One end of the pressing roller can be raised to facilitate the unloading of the workpiece.
4-roll bending machine
There are also four-roller and multi-roller plate rolling machines. Four-roller plate rolling machines are used to roll thick plate cylinders. Multi-roller plate rolling machines with more than four rollers use multiple pairs of rollers to gradually bend the plates into complex shapes.
For bending parts that require high precision, large length and radius of curvature, and small transverse dimensions, they can be stretched and bent on a special stretch-bending machine. During stretching and bending, the entire thickness of the plate is subjected to tensile stress, so only elongation deformation occurs, and the deformation caused by spring-back after unloading is small, which is easy to ensure accuracy.