Study on cutting force fluctuation characteristics and suppression of non-circular gear hobbing
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 im-portant 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 in-termittent 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 con-stant 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.
NETL
NSTL
万方数据
维普
