带凸角的磨前滚刀齿形设计

• 作 者: 唐金学
• 机 构: 华山冶金车辆厂,
• 出 处: 机械工艺师
• 发表日期: 1984年04期
• 关键词: 凸角 硬质合金滚刀 磨齿 齿根 重载齿轮 应力集中源 延伸渐开线 刀具 渐开线 齿廓

应用带凸角齿形的磨前用滚刀可使磨齿时齿根不再被加工,因而保留了热处理获得的表面压应力效果。同时设计凸起量大于留磨量,这样磨齿时就不会在齿根形成所谓“加工凸台”,又避免了这种有害的应力集中源对齿轮强变的影响。这就是凸角磨前滚刀在重载齿轮制造中应用渐多的原因。我厂长期生产进口、国产矿用电力机车的牵引齿轮。现采用硬质合金滚刀精加工来代替磨齿加工。为适应硬质合金滚刀刀具的特点,我们也采用带凸角形式的留量滚刀。下面是我们设计计算采用的方法。

The use of a toothed hob with a hob before hobbing allows the root to be machined without grinding, thus preserving the effect of surface compressive stress obtained by heat treatment. At the same time the design of the amount of protrusion is greater than the amount of grinding, grinding tooth so that it will not form the so-called “processing boss”, but also to avoid this harmful stress concentration on the strong gear changes. This is why the front lobe hob is used more and more in the manufacture of heavy-duty gears. I plant long-term production of imported and domestic mining electric locomotive traction gear. Are using carbide hob finishing instead of grinding. In order to meet the characteristics of carbide hob tools, we also use the form of retaining the hob with hob. Here is how we design and calculate.