我们曾采用加热法煨制角钢圆形件,由于双角钢点焊拼成丁字形,受力点的对称,使在三辊卷板机上弯钢成为可能。但在弯制过程中容易使角钢截面变形,出现翻边,且变形量与曲率成正比,曲率大,变形量也大(图1)。 为此,我们在工艺上采用“加辊卷法”解决了上述问题,具体方法如下, We have used heating method simmer angle round steel parts, due to the double-angle spot welding spell into a T shape, the force point of symmetry, so that the three-roll bending machine bending possible. However, in the bending process, it is easy to deform the angle section and turn over the flange. The deformation is proportional to the curvature, and the curvature is large and the deformation is also large (Fig. 1). To this end, we use the process of “plus roll method” to solve the above problems, the specific methods are as follows,