| 摘要 |
PURPOSE:To produce an endless band with the decreased number of stage and reduced cost by welding both ends of a wire rod having a circular section and a prescribed length to form an annular wire rod and adjusting the overall circumferential length and thickness of the annular wire rod to a prescribed size by rolling. CONSTITUTION:A metallic wire rod 1a having a circular section is cut at the sections 2a, 2b orthogonal with the axis to a prescribed length. Both cut faces 2a, 2b are welded by electron beam welding, etc. to form the annular wire rod 1b. The wire rod 7b is attached to a rolling device 60 provided with a forming roll 30 with rolling, a press roll 40 and a tension roll 50. The wire rod 1b is turned under the constant tension applied at all times by the roll 5 and is crushed by the rolls 30, 40 to have the increased length and width. Such wire rod is subjected to the forming operation to increase the length and to decrease the width by a stretching machine and is finished to the prescribed thickness and circumferential length. The metallic endless band 1c is thus produced. |
