We made the pipe clamp when we cold-bend the thin-walled pipe (Fig. 1), which works well. There are no wrinkles in the bend and no mechanical damage. When the pipe is bent, the fixture chassis 1 (Fig. 2) is clamped on the vise, and the workpiece (steel pipe) 4 to be bent is placed between the tire wheel 2 and the follower wheel 6, and the workpiece 4 and the tire wheel 2 are clamped by the clamping block 5. Tightly fastened together, then rotate the follower handle 7,
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