| 摘要 |
PURPOSE: A forming apparatus of a bead of a pipe is provided to form the bead around the pipe though the pipe is formed to a device integrally. CONSTITUTION: A forming apparatus of a bead(5) of a pipe(2) has a supporting shaft; a rest(14) and a pressure device. The supporting shaft is formed to a middle portion of a supporting body. Rests(14) are formed to both ends of the supporting body. The pressure device is formed to the rest. A press hole is formed to the supporting shaft or the pressure device. The press hole is connected to the supporting shaft and the pressure device respectively by dividing a tubular supporting mold hole(20) and a tubular pressure hole(22). A supporting mold hole is composed of a concave portion and a convex portion. Therein, bead is formed along an outer peripheral surface of the pipe. A guide roller(24) is installed to other pressure device to assist to form the bead by rotating of the press hole around the outer surface of the pipe. Thereby, the bead is formed easily by linking protrusions with rotation of the forming apparatus along the outer peripheral surface of the pipe.
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