小模数弧齿锥齿轮的精确建模与齿面接触仿真

The Pricesion Model and Tooth Surface Contact Simulation on Small Module Spiral Bevel Gears

双重双面法铣齿加工是小模数弧齿锥齿轮的主要加工方法,传统双重双面法的齿面啮合状况需要人工调整,过程繁琐且齿面接触质量难以保证。针对小模数弧齿锥齿轮双重双面法加工的特点,建立了双重双面法加工坐标系,按照齿面加工参数和刀具参数,由刀具的切削锥面方程,经过坐标变换推导被加工齿面的齿面方程,并计算得到齿面上关键点的坐标值,利用这些关键点坐标,可以创建理论齿面片的三维模型,进而创建了齿轮副的整体三维模型。利用计算机数值仿真技术,对齿轮副进行了齿面啮合仿真。根据仿真结果,可以调整齿面加工参数,以改善齿面的接触情况,减少目前齿面接触区要依靠人工调整的繁琐过程。在提升齿面啮合质量的同时,也提高了齿轮副的实际生产效率。

Duplex spread-blade method is the main processing of traditional small module spiral bevel gears.For traditional duplex spread-blade method,the meshing contact between the two tooth surfaces often depends on complex manual adjustment,which is the fundamental reason why it is difficult to improve the tooth surface contact performance.For the duplex spread-blade method,according to the gear machining parameters and head-cutter parameters,the tooth surface equation was derived from the head-cutter cone surface equation by coordinates transformation,and the coordinates of the key tooth surface points was calculated.Using the key points coordinates,the theoretical tooth surface 3 D model was created,and then the 3 D model of the gears were created.With computer numerical simulation technology,the tooth surface meshing status was simulated.According to simulation results,the tooth surface machining parameters can be adjusted to improve meshing performance,and reduce the process of manual contact bearing adjustment.The research can improve the tooth meshing quality,and also improve the machining efficiency of spiral bevel gears.