摘要
滚齿是非圆齿轮加工实现的重要方法,用于节曲线外凸直或斜齿非圆齿轮的高效高精制造,节曲线非圆特性导致滚切力呈现较大幅度波动,影响制造过程稳定性及加工精度,是非圆齿轮滚齿领域需要研究的重要课题。文章基于单位切削力计算原理及圆柱齿轮滚切力的研究成果,采用单次断续切削产生的未变形切屑体积表征滚切力波动态势,构建非圆齿轮滚切未变形切屑模型的获取方法。选取大偏心率卵形齿轮为研究对象,分析滚刀恒速不窜刀联动加工模型所产生的滚切力波动特性,得出该联动加工模型所对应峰值切削力的波动规律。提出一种滚刀恒速并附加窜刀的联动加工模型,该模型具有恒定弧长增量加工特性,对抑制整周滚切力波动具有重要意义,并开展不同滚切深度所对应滚切力波动规律研究,研究结果为非圆齿轮滚切方案的优化制定提供一定的理论依据。
Hobbing is an important method to realize the non-circular gear machining,which is used for the high-efficient and high-precision manufacturing of straight or helical non-circular gear with convex pitch curve.The non-circular features of the pitch curve lead to large fluctuations in cutting force,which affects the manufacturing process stability and the machining accuracy,and has become an important topic to be studied in the field of non-circular gear hobbing.Based on the calculation principle of unit cutting force and the existing research results of cylindrical gear hobbing force,the fluctuation characteristics of cutting force were displayed by the undeformed chip volume generated by single intermittent cutting,and a method to obtain the solid model of undeformed chip in non-circular gear hobbing was constructed.Oval gear with large eccentricity was selected as a research example,and then the fluctuation characteristics of the cutting force generated by the machining model with constant hob speed and without hob shifting were analyzed,and the fluctuation law of the corresponding peak cutting force was obtained.A linkage machining model with constant hob speed and hob shifting was proposed,which has the characteristic of equal arc length machining and is of great significance to restrain the fluctuation of the whole circle cutting force.In addition,the fluctuation law of cutting force corresponding to different cutting depths was studied.The research results provide theoretical basis for the formulation and optimization of hobbing scheme for non-circular gear.
作者
韩江
李大柱
田晓青
夏链
HAN Jiang;LI Dazhu;TIAN Xiaoqing;XIA Lian(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2024年第2期169-175,245,共8页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(51875161,52075142)。
关键词
非圆齿轮
滚齿
切削力
切屑体积
力波动
抑制
non-circular gear
hobbing
cutting force
chip volume
force fluctuation
suppression
