| 摘要 |
PURPOSE: A pip processing apparatus and method and a pipe manufactured by the apparatus are provided to easily form a radial protrusion, which is extended long along the central axis of a pipe, on the exterior of the pipe. CONSTITUTION: A pipe processing apparatus comprises a plurality of pressure balls(10), a translational movement unit(20), and a rotational movement unit(30). The pressure balls are arranged in the columnar direction of a pipe inside the hollow of the pipe and press the interior of the pipe for plastic transformation where the exterior of the pipe is protruded outward. The translational movement unit linearly moves the pressure balls along the central axis of the pipe, relative to the pipe. The rotational movement unit relatively rotates the pressure balls around the central axis of the pipe, relative to the pipe. |
