关键词: 齿向修形, 成形磨削, 原理性误差, 建模, 仿真

Abstract: In forming grinding of lead modification helical gears,the machining principle error of tooth surface was existed.To improve the grinding accuracy,the principle error model was established based on the analysis of mechanism of tooth surface principle error,and the error reduction method was put forward.The calculation model of contact line was built through point-vector group digital envelope method,and the simulation tooth surface was obtained by combining with contact lines acquired form wheel grinding track.The simulation tooth surface error was evaluated from simulation examples.The principle error mechanism from three aspects of contact line morphology,X and C axis additional movements was analyzed,the calculation model of principle error was established,and the correctness of error calculation model was verified by comparing with simulation results.To reduce the tooth surface principle error,a joint optimization method of grinding wheel setting angle and grinding wheel profile was proposed.The effectiveness of proposed error reduction method was verified by a simulation case of forming grinding the lead modification helical gear.

Key words: lead modification, form grinding, principle error, modeling, simulation