| 摘要 |
PURPOSE:To improve working efficiency by setting every bender performing right or left bending work each to be capable of moving up and down and aligning a booster, tube supporing rolls, and others with a straight line on the top surface of a common bend leg part. CONSTITUTION:Guide rails 12 are set on the arm part 18 of the common bed 1 and a table 13 is fitted to the rails 12. The bender 14 for right bending and the bender 15 for left bending are set on the table 13 with a specified distance from each other and to be capable of moving up and down each the benders 14 and 15 are provided with bending dies 18 and 19 having different bending radii and bending directions, respectively. A long-sized tube formed by welding plural straight pipes is moved in the axial direction of the leg part 2 through a tube supporting roller 3. The benders 14 and 15 perform the right and left bending works each through a twisting chuck 6 and a length measuring device 7. The working efficiency is improved because it is practicable to perform the succeeding snaky bending with different radii for a long-sized tube.
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