TWIST PROCESSING METHOD, TWIST PROCESSING PROGRAM AND TWIST PROCESSOR

To perform twist processing which reduces load torque of twist deformation and is high in accuracy of phase positioning.SOLUTION: A twist processing method includes: a first synchronized rotation step (S1) of synchronously rotating two rotating shafts with both ends of a workpiece held by the two rotating shafts; a heating step (S2) of heating the workpiece via a heater while synchronously rotating the two rotating shafts; twist processing steps (S3, S4) of adding a twisting motion to the workpiece by setting a difference in rotational speeds of the two rotating shafts after the lapse of a prescribed heating time from the start of the heating in the heating step; a second synchronization rotation step (S6) of synchronously rotating the two rotating shafts after the end of the twist processing steps; a heating stopping step (S7) of stopping the heating by the heater during the execution of the second synchronization rotation step; and a releasing step (S8) of stopping the synchronization rotation of the two rotating shafts after stop of the heating by the heater.SELECTED DRAWING: Figure 2 【課題】ねじり変形の負荷トルクを減少させ、位相位置決め精度の良いツイスト加工を行う。【解決手段】２つの回転軸によってワークの両端を保持させて、２つの回転軸を同期回転させる第１の同期回転ステップ（Ｓ１）と、２つの回転軸を同期回転させながらワークを加熱装置により加熱する加熱ステップ（Ｓ２）と、加熱ステップでの加熱開始から所定の加熱時間の経過後、２つの回転軸の回転速度に差を設定することでワークにねじり動作を加えるツイスト加工ステップ（Ｓ３，Ｓ４）と、ツイスト加工ステップの終了後、２つの回転軸を同期回転させる第２の同期回転ステップ（Ｓ６）と、第２の同期回転ステップの実行中に加熱装置による加熱を停止する加熱停止ステップ（Ｓ７）と、加熱装置による加熱の停止後、２つの回転軸の同期回転を停止する解除ステップ（Ｓ８）とを実行する。【選択図】図２