A precision generating hobbing method for face gear with assembly spherical hob
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In order to improve the processing precision and shorten the hob manufacturing cycle of the face gear, a precision generating hobbing method for face gear with the assembly spherical hob is proposed. Firstly, the evolution of the cylindrical gear to spherical hob basic worm is analyzed, then the spherical hob basic worm is designed, thus the basic worm and spiral angle equation of spherical hob are obtained. Secondly, based on the design method of the existing hob, the development method of the assembly spherical hob is analyzed, the cutter tooth and the cutter substrate of the assembly hob are designed, and the whole assembly is finished. Thirdly, based on the need of face gear hobbing, a numerical control machine for gear hobbing is developed, and the equation of the face gear is obtained. Fourth, for reducing the face gear processing errors induced by equivalent installation errors, the error analysis model is established and the impacts of each error on the gear tooth surface are analyzed. Finally, the assembly spherical hob is manufactured and the gear hobbing test is completed. According to the measurement results, the processing parameters of face gear hobbing are modified, and the deviation of tooth surface is significantly reduced.
Keywordsface gear spherical hob basic worm assembly spherical hob error analysis hobbing machine
为了提高面齿轮加工精度和缩短滚齿加工周期,本文提出了一种装配式球形滚刀加工面齿轮精 密展成滚齿方法。第一,分析了圆柱齿轮至球形滚刀基蜗杆演变机理,设计了球形滚刀基蜗杆,建立 了球形滚刀基蜗杆和螺旋线方程。第二,基于已有的滚刀设计方法,分析了装配式球形滚刀研制方法, 设计了装配式球形滚刀刀齿和基体,完成了整体装配。第三,基于面齿轮滚齿加工的需求,开发了滚 齿加工数控机床,建立了面齿轮齿面方程。第四,为了减少由等效安装误差引起的面齿轮加工误差, 建立了误差分析模型,分析了各误差对面齿轮齿面的影响。最后,完成了球形滚刀装配和面齿轮滚齿 试验。根据测量结果,调整面齿轮滚齿加工参数,齿面偏差得到显著降低。
关键词面齿轮 球形滚刀基蜗杆 装配式球形滚刀 误差分析 滚齿加工
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