416 転がり直動案内要素のクラウニング処理による寿命への影響(GS-11 トライボ材料・表面疲労)

概要

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Ball Way as the machine element is used in the straightly moving parts. The life tests were given to both conventional Ball Way (Non crowning) and Ball Way treated crowning (Step crowning) in the three normal load condition 5.9kN, 9.8kN, and 13.7kN. As a result, the life value of Ball Way fits better to the 3-parameter Weibull distribution than 2-parameter in the case of any conditions. The life value in Step crowning is longer than that in Non crowning and the variation of life in Step crowning is larger than that in Non crowning. In some load conditions the development position of crack on the guide block is larger. From the SEM analyses of pitting and crack occurred on the raceway surface, it shows that the characteristics of rolling contact fatigue failure is the pitting initiated from the surface.
2000-03-16