METHOD OF CORRECTING PROCESS TOLERANCE OF GEAR GRINDER

• Main Authors: KATAYAMA MASASHI, OUCHI HISAO
• Format: Patent
• Language: English; Japanese
• Published: 19.05.2016
• Subjects: DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; MACHINE TOOLS; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; MAKING GEARS OR TOOTHED RACKS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; POLISHING; TRANSPORTING

PROBLEM TO BE SOLVED: To correct a helix angle without changing a pressure angle of a workpiece, by using a simple method without correcting a shape of a dresser.SOLUTION: A correction value of a phase between a vertical axis of a work table and a central axis of a grindstone is obtained from an error of a helix angle, and a gear shape is predicted in the case that a grindstone shape is changed according to a grindstone molding condition in which Y-direction feeding of a screw-like grindstone is corrected in accordance with the correction phase, and then an error of a pressure angle of a tooth surface in that case is estimated, and a pressure angle amount to be corrected, when a feed angle between a dresser rotational axis and a grindstone central axis is shifted before correction, is predicted in order to calculate a correction angle, and after correcting the screw-like grindstone by using a dresser in a posture that the feed angle is corrected only by the calculated correction angle, a workpiece is ground.SELECTED DRAWING: Figure 5 【課題】ドレッサの形状を修正することなく、簡単な方法でワークの圧力角を変更せずにねじれ角を修正できるようにすることにある。【解決手段】ねじれ角の誤差からワークテーブルの垂直軸と砥石の中心軸との間の位相の修正値を求め、その修正位相に合わせてネジ状砥石のＹ方向送りを修正した砥石成形条件によって砥石形状を変更した場合の歯車形状を予測し、そのときの歯面の圧力角の誤差を推定し、ドレッサ回転軸と砥石中心軸との間の送り角度を修正前からずらした場合に修正される圧力角の量を予測して修正角度を計算し、計算された修正角度だけ送り角度を修正した姿勢でドレッサでネジ状砥石を修正した後、ワークを研削する。【選択図】図５