PROBLEM TO BE SOLVED: To provide a helical internal gear processing broach for further accurately processing a gear, by preventing a tooth trace error tendency value of a right flank and a left flank from becoming different by 0.005 or more.;SOLUTION: This helical internal gear processing broach, has a cutting edge where a spline helix angle β is set to 19° β≤ 34°, a blade groove helix angle α is limited to a range of 0°α 8°-β, respective cutting edge angles δR of an obtuse angle flank is set to a range of 90°+(β-19°)×2 δR90°+β, a cutting quantity ΔtL of an acute angle flank is also set to 0.001 to 0.003 mm, a cutting quantity ΔtR of the obtuse angle flank is set to 0.004 to 0.008 mm, and ΔtR/ΔtL ratio is set to 2.5 or more, and/or a cutting edge where a clearance angle γL of the acute angle flank is set to 0°10' to 0°20', and a clearance angle γR of the obtuse angle flank is largely set to γL + (0°10' to 0°20').;COPYRIGHT: (C)2005,JPO&NCIPI
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机译：解决的问题：通过防止右齿侧和左齿侧的齿迹误差趋势值相差0.005或更多，来提供一种螺旋形内齿轮加工拉刀，以进一步精确地加工齿轮。齿轮加工拉刀，其刀刃上有花键螺旋角β;设置为19° <＆beta;＆le; 34°时，叶片槽螺旋角α限制在0°<α<8°-β的范围内，钝角侧面的各个切削刃角δR R设置在90°+（β- 19°）×2 <90°+β，锐角侧面的切削量Δt L 也设置为0.001至0.003 mm，钝角侧面的切削量Δt R 设置为0.004至0.008mm，Δt R /Δt L < / Sub>比率设置为2.5或更大，和/或将锐角侧面的间隙角 Sub> L 设置为0°10'至0°20'的切削刃，和钝角侧面的后角γ R 设置为γ L +（0deg; 10'至0＆deg; 20'）.; COPYRIGHT：（C ）2005，日本特许厅
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