Bending tool for spiral welded pipe

The invention discloses a bending tool for a spiral welded pipe, and relates to the technical field of spiral welded pipe bending processes.. The bending tool for the spiral welded pipe is simple in structure and easy to operate, one-time forming is achieved, the tool efficiency is improved, and the bent section of the spiral welded pipe is in smooth transition. The bending tool comprises an outerdie fixed to an oil press and a workbench used for place the spiral welded pipe to be bent; the outer die is provided with a groove, the width of the groove matches the outer diameter of the spiral welded pipe to be bent, and the bottom surface of the groove is in an arc-shaped bulge shape; and tool is characterized by further comprising a flexible chain column support structure which is arrangedin the spiral welded pipe to be bent, and the outer diameter of the flexible chain column support structure matches the inner diameter of the spiral welded pipe to be bent. According to the invention, smooth transition of the