CBN砥石を用いた精密歯車研削盤の設計・製作と研削された歯車の負荷能力 : 第2報, 適当な硬度差によって得られる鏡面研削歯車の面圧強さの向上

概要

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In the previous investigation, the authors clarified that the surface durability (pitting limit) of mirrorlike ground gears is very high and nearly equal to the upper limit of the pitting limit obtained by test rollers with very smooth surface. In the present investigation, the authors succeeded in increasing the surface durability of the gears far beyond the upper limit obtained by test rollers by giving an adequate hardness difference between two mating gears. Higher hardness gears were used as driver. This is because pitting failure occurring on the driving gear was more severe than that on the following gear when mirrorlike ground precision gears with no hardness difference were over-loaded. When a driving gear with a higher hardness of 280 HB was combined with a following gear with a hardness of 185 HB, the pitting limit of the 185 HB gear increased from p_<max>=1100 MPa to 1400 MPa. A method to estimate the adequate hardness difference was proposed.
一般社団法人日本機械学会の論文
1991-03-25