直動案内要素の転動疲労寿命に関する研究

概要

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The roiling contact fatigue life tests of 50 Ball Ways (Type H 25 TA) under the test conditions of normal load F=5.9 kN, 9.8 kN and 14 kN and the linear stroke 1s=200 mm are carried out to investigate the fatigue life distribution of Ball Way. The results of Weibull analisys of life value are that the life of Ball Way fits well to the 2-parameter Weibull distribution and the average value of shape parameters is 4.4. The influence exponent of the normal load to the life, which is obtained from the life data, is p=3. From SEM analisys of the raceway surface, it is evident that the characteristic of rolling contact fatigue failure is pittings' initiation from the surface. And, the relation between linear stroke and basic dynamic load rating is described, which is obtained according to the life theory considered with the characteristic of fatigue failure and the life test results.
1998-12-25