Apparatus for drawing-in a pipe end by cold forming

Apparatus for drawing-in a pipe end by plastic cold forming, comprising a clamping cody, an annular body disposed on said clamping body and having an inner surface and a center, an internal tool in the form of a stop ring centrally supported on said annular body for defining a desired inside pipe profile, a plurality of jaws disposed on said annular body for extending over the outside of a region of a pipe to be drawn-in, said annular body having blind bores serving as cylinders formed therein in radial directions with openings facing toward said inner surface of said annular body, and pistons connected to said jaws being inserted in said cylinders and movable radially toward the center of said annular body by a pressure medium, said stop ring having individual stop means in the form of stop heads for abutting the inner surface of the pipe during a drawing-in operation, said stop heads having threaded shafts being radially adjustably screwed into radial threaded bores formed in said stop ring, and said threaded shafts having ends with means for allowing rotation of said threaded shafts.