Before the analysis, let's first have a simple understanding of the plate bending machine. It is a kind of special forging machine equipment that can bend metal plates into cones, spheres, cylinders or other shapes. This performance is widely used in manufacturing , boiler steam, chemical industry, metal structure and machine building and other businesses. It is because it is widely used by all walks of life that the rapid development of today's plate rolling machine business has occurred.
At present, the mainstream of plate bending machines is mainly three-roller and four-roller, which are all suitable for bending and forming of metal sheets. They can roll circular, arc-shaped and conical workpieces within a certain range. Three-roller is relatively simple, while four-roller is relatively Three rollers only have one more roller, but the price is much higher.Why would someone choose a four-roll rolling machine?So what are the advantages of the existence of four rollers?
First of all, from the functional point of view, the four-roller has the function of pre-bending the end of the plate, the remaining straight edge is small, and the work efficiency is high, and the metal plate can be roughly leveled on this machine. From how it works:
Figure 1 Four-roller rolling steps
Figure 1 shows the four-roller rolling step, the position of the upper roller is fixed, and the lower roller moves straight upward to clamp the steel plate. The rollers on both sides move toward the upper rollers in a straight line or in an arc to adjust the
radius of curvature of the roll.
The four-roller and three-roller rolling machines have different rolling motions, but the working principle is the same. They all use the principle of three-point circle to roll with different radii. However, the straight edge and roundness of the pre-bending of the four-roll rolling machine are better than those of the three-roller.
From the three-roll four-roll comparison table in Table 1, it can be seen that the operating system is the same, but the four-roller is better than the three-roller in terms of pre-bending, remaining straight edges and efficiency, but it is expensive. At present, the three-roller has been restructured. For example, the W11H (three-roller arc downward type) has optimized the three-roller, and some functions are close to the four-roller. When the four-roller technology matures, the cost will be reduced, and it may completely replace the three-roller in the future.
Table I：Three-roll four-roll comparison table