Profile stretch bending process according to Beijing Shengda Albert profile stretch bending factory characteristics, stretch bending can be divided into top bending, bending, rolling and bending bending.
Bending is the most common method of bending. Most of the equipment used is a universal mechanical press or hydraulic press, and also a special bending press. The common bending equipment is the plate bending machine. Three roller bending machine according to three points to determine the reason of a round, continuous bending of the slab. The three roller bending machine has two drive rolls (fixed) and a lower roller (adjustable). The relative distance between the roller and the drive roller can be changed by adjusting the upper and lower positions of the lower roller. During the tension bending, the plate is placed between the transmission roller and the lower roller, and the drive roller rotates in reverse direction to cause the plate to move back and forth. By adjusting the roll to reduce it gradually, the plate can be bent to the required curvature of the cylindrical surface, cone surface and curvature of the smaller hyperboloid. One end of the depressed roller can be raised so that the workpiece can be easily removed. In addition, there are four roller and multi roll bending machine, four roller bending machine used to roll the thick plate cylinder, more than four rolls of multi roll bending machine, with many pairs of roll plate gradually bent into complex shape.
For the bending parts with higher precision, higher requirements of length and radius of curvature, smaller lateral dimension, they can be stretched and bent on a special drawing machine. In tensile bending, all the thickness of the plate is subjected to tensile stress, so it only produces elongation deformation. After unloading, the deformation caused by the rebound is small, and it is easy to guarantee the accuracy.