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目前,国内许多厂家对循环球式汽车转向器扇齿轮均采用滚齿加工。在设计专用滚刀时需要确定滚刀的齿形角。 . 滚刀滚切扇齿轮如图1所示,齿坯和滚刀的转动形成范成运动,滚刀刀架的进给运动与扇齿轮轴轴线形成γ角,可分解为垂直运动和水平运动,水平运动使被加工的扇齿轮齿形成变齿厚。 过滚刀齿顶b作一平面I—I垂直于扇齿轮轴轴线,与扇齿轮齿顶交于a点;过滚刀前刀面作一平面N—N垂直于滚刀刀架进给运动方向,与扇齿轮齿顶交于c点。当γ=0时,加工出的扇齿轮为圆柱齿轮。由于γ角的存在,最后成形切削的是在N-N平面内,而
At present, many domestic manufacturers of hobby gears for recirculating ball car steering gear are hobbed. Hob in the design of special need to determine the gear hob angle. Hob hob gear As shown in Figure 1, the gear hob and hob form a fan into motion, hob hob feed movement and the fan shaft axis forming γ angle, can be decomposed into vertical and horizontal movement , The horizontal movement makes the fan tooth gear teeth into a variable thickness. Over hob tooth top b Make a plane I-I perpendicular to the fan gear shaft axis, intersect with the fan gear tooth top at a point; over hob rake face make a plane N-N perpendicular to hob feed movement Direction, with fan gear tooth top at the c point. When γ = 0, the machined fan gear is a spur gear. Due to the presence of γ-angle, the final shape is in the N-N plane