Allowable Transmission Load of Carburized Gear for Risk Management

“齿轮的伤害带来了巨大的经济损失，而且造成了意外的风险，使人类生活受到影响。”因此，对齿轮的风险管理是非常重要的。在另一方面，如果要降低能源消耗的话，则需要功率传输齿轮系统具有缩小尺寸和长期可靠性。为了估计齿轮损坏的可能性是可以被证明的，在这项研究中，自2004年以来，一个后续项目已经完成了3年的一个学期，并将其应用于碳化齿轮的设计。开发一种基于累积力强度的模拟方法来估计其分布。根据齿轮的疲劳测试进行的模拟方法的验证。建立一种方法来进行估计，并确定在考虑损坏概率的可能性时允许的应力。要达到以上的主题，各种研究从宽视点点传送出来，以及随后获得的结果。对P-S-N曲线的估计，从碳化齿轮的可靠性设计的角度来看。通过图像处理对靠近牙齿填充的应变的定量评估，在碳化齿轮的可靠性设计中发展肥胖强度模拟。表面耐久性模拟的发展将包括在内的分布。

The damage of the gears brings the large economic loss, and has the risk of causing the accident which involves the human lives. Thus the risk management of the gears is extremely important. On the other hand, in order to decrease the energy consumption, the power transmission gear system is required to be the downsizing and the long-term reliability. To estimate the probability of damage of the gears is indispensable for this purpose.In this research, the following project was carried out for a term of 3 years since 2004 in order to apply the risk management to the design of the carburized gears.・Developing a simulation method to estimate the fatigue strength based on distribution of the inclusions.・Validation of a simulation method based on the fatigue tests of the gears.・Establishing a method for the estimation and assuring the allowable stress of the carburized gears in consideration of the probability of damage.To achieve above subjects, the various research were carried out from the broad view points, and following result were obtained.・Estimation of P-S-N curves in view of the reliability design of the carburized gears.・Quantitative evaluation of the strain near the tooth fillet by an image processing・Development of the fatigue strength simulation in the reliability design of the carburized gears.・Development of the surface durability simulation considering the distribution of the inclusions.