双色红外系统测量脆性材料磨削温度的研究

用光纤辅助双色红外探测仪研究了金刚石砂轮磨削花岗石和陶瓷过程中接触区的温度特征，研究结果表明：和单色系统相比，双色红外系统除了温度之外还可得出磨削条件下所对应的被测物体的发射率，接近工件表面的温度测量结果由于受测温用盲孔的影响会偏高，因此，红外温测系统适用于直接测量工件表面下方一定距离外的温度变化，而工件表面温度则用拟合方法得到能量传入工件的比例后再通过理论计算得出，由于可以得到能量的传输比例，磨削温度测量对理解工具与工件界面的传热机制具有重要意义。

MEASUREMENT OF TEMPERATURES IN GRINDING OF BRITTLE MATERIALS USING TWO-COLOR INFRARED SYSTEM

Coupled with an optical fiber,temperature responses at the contact zone during grinding of granite and ceramics with a diamond grinding were measured using a two color infrared detector. It was shown that, compared to a single photocell system, the two color detector is able to measure not only the temperature, but also the corresponding apparent emissivity of the workpiece under the grinding conditions. Since the measured temperatures near the surface are somewhat higher than analytical results due to the holes for the optical fiber, the infrared system is suitable for measuring the temperatures at some distance below the workpiece surface. The temperatures on and near the workpiece surface can be calculated from the theoretical thermal model based on the ratio of energy conducted to the workpiece, which can be obtained by a temperature matching technique. The measurement of gridning temperatures is important for understanding the heat transfer at the tool workpiece interface since the energy partition value can be obtained based on the measured temperatures.