分析和计算了这台在数字控制系统和部分机械部件都经改进了的齿轮测量中心Mahr891E螺旋线偏差测量系统的测量精度,应用光学测量系统测量了各部分运动系统精度,经理论计算螺旋线偏差测量系统测量不确定度,可知这台改进后的齿轮测量中心Ma...分析和计算了这台在数字控制系统和部分机械部件都经改进了的齿轮测量中心Mahr891E螺旋线偏差测量系统的测量精度,应用光学测量系统测量了各部分运动系统精度,经理论计算螺旋线偏差测量系统测量不确定度,可知这台改进后的齿轮测量中心Mahr891E螺旋线偏差测量系统可以完成标准Cylindrical Gears-ISO System of Accuracy和GB/T10095,1-2001中所规定的超精密齿轮螺旋线偏差测量任务。展开更多
To minimize quenching distortion and dispersion, carburizing and quenching process conditions must be optimized; this includes the parts racking design used for quenching. We investigated some factors affecting carbur...To minimize quenching distortion and dispersion, carburizing and quenching process conditions must be optimized; this includes the parts racking design used for quenching. We investigated some factors affecting carburized quenching distortion with an experiment using a hypoid gear having a shaft and with numerical simulation methods. The experimental results and those obtained from simulation were generally in agreement. Focusing on the surface temperature distribution in the gear, we studied quenching distortion characteristics in terms of changes in tooth profile and helix deviation. In our experiments, distortions occur during quenching in 373 K oil after austenitized temperature treatments conducted with various attitudes. We calculated the distortions by simulating the carburized oil-quenching process for the hypoid gear. Our results show large differences between the cooling rates of the tooth toe, middle section, and heel edges, and these greatly influence the change in tooth profile and helix deviation. We found that reducing the differences in temperatures on the gear surfaces during quenching is most important for minimizing the quench distortion of the hypoid gear.展开更多
文摘分析和计算了这台在数字控制系统和部分机械部件都经改进了的齿轮测量中心Mahr891E螺旋线偏差测量系统的测量精度,应用光学测量系统测量了各部分运动系统精度,经理论计算螺旋线偏差测量系统测量不确定度,可知这台改进后的齿轮测量中心Mahr891E螺旋线偏差测量系统可以完成标准Cylindrical Gears-ISO System of Accuracy和GB/T10095,1-2001中所规定的超精密齿轮螺旋线偏差测量任务。
文摘To minimize quenching distortion and dispersion, carburizing and quenching process conditions must be optimized; this includes the parts racking design used for quenching. We investigated some factors affecting carburized quenching distortion with an experiment using a hypoid gear having a shaft and with numerical simulation methods. The experimental results and those obtained from simulation were generally in agreement. Focusing on the surface temperature distribution in the gear, we studied quenching distortion characteristics in terms of changes in tooth profile and helix deviation. In our experiments, distortions occur during quenching in 373 K oil after austenitized temperature treatments conducted with various attitudes. We calculated the distortions by simulating the carburized oil-quenching process for the hypoid gear. Our results show large differences between the cooling rates of the tooth toe, middle section, and heel edges, and these greatly influence the change in tooth profile and helix deviation. We found that reducing the differences in temperatures on the gear surfaces during quenching is most important for minimizing the quench distortion of the hypoid gear.
