关键词: 双刀盘铣齿, 空间包络理论, 齿面最大法向偏差, 参数优化

Abstract: Aiming at the problems that big normal deviation and maldistribution of tooth surface existed in the process of single cutter helical gear milling,a new method of duplex cutter helical gear milling was proposed.Based on the spatial envelope principle,the mathematical model of duplex cutter gear milling was obtained.In addition,the transverse-profile of tooth surface and normal deviation enveloped by duplex cutter were calculated by parsing algorithm.Under the premise of no overcutting,the cutter spacing adjustment range was calculated.Combined with the shaft center distance of duplex cutter,the relationships between the maximum normal deviation of transverse-profile surface and the shaft center distance of duplex cutter as well as the cutter spacing were also analyzed.According to the relationship,base on the constraint conditions of the key parameters of duplex cutter gear milling,the shaft center distance of duplex cutter and the cutter spacing were adjusted.To reduce the tooth surface maximum normal deviation,the optimization of these key parameters was researched by using discrete variable grid direct optimization algorithm.Thus,the optimization of transverse-profile's normal deviation was realized.The physical prototype test showed that the optimization method could effectively reduce the tooth surface maximum normal deviation.

Key words: duplex cutter gear milling, spatial envelope principle, maximum normal deviation of transverse-profile, parameter optimization