新型人字齿同步带轮根切与齿廓修形  

UNDERCUT AND TOOTH PROFILE MODIFICATION OF DOUBLE HELICAL PULLEY

作　　者：郭建华[1] 李建博 姜洪源[2] 李文华 

机构地区：[1]齐齐哈尔大学机电工程学院,齐齐哈尔161006 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《机械强度》2017年第6期1404-1408,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51175273)资助~~

摘　　要：针对新型人字齿带轮加工中,滚刀齿根和齿侧圆弧刃在带轮上形成的共轭曲面出现折线不光滑问题,利用空间微分几何和啮合理论对滚刀共轭齿廓上折线产生机理进行了研究。通过对滚刀齿廓曲面根切界限曲线特点分析,确定了滚刀曲面消除带轮曲面奇异点的参数约束条件,提出了在滚刀法面齿廓上增加过渡圆弧曲线消除带轮齿廓奇异点的修形方法,建立了具有根切约束条件的滚刀修形齿廓模型。在进行修形后的带轮齿廓与人字齿同步带耦合分析基础上,确定带轮修形滚刀法面齿廓齿形参数。通过计算仿真对比,修形后带轮齿廓槽顶曲线光滑,可以减小啮合过程中的磨损,为提高带轮齿面的光滑度提供了有效的修形方法。As for the smooth problems in the conjugate surface arising from hob tooth root and flank arc edge during the processing of new double helical synchronous belt＇s pulley,the broken line generation mechanism at the conjugate tooth profile was investigated with spatial differential geometry and meshing theory. Through the undercut boundary curve characteristics analysis of the hob tooth profile surface,the parameter constraint conditions used to eliminate the pulley surface singularity was determined,and the eliminating profile singularity modification method by increasing the transition arc curve slope face on the hob tooth profile was proposed. Then the tooth profile hob practice model with undercutting constraints was built. The timing belt pulley＇s hob tooth normal face profile parameters after modification was obtained based on coupling analysis of the modification pulley profile and double helical synchronous belt. The simulation shows that the pulley profile＇s top curve after modification is smooth,it can reduce the abrasion during the meshing process and provide a useful modification method to improve the surface smoothness of the tooth belt.

关 键 词：滚刀 同步带带轮 齿形修形 根切界限曲线 仿真 

分 类 号：TH132.3[机械工程—机械制造及自动化]