Temperature measurement in high efficiency deep grinding

Abstract

Temperature measurements are employed for research into the mechanics of grinding and for process monitoring. Temperature measurement in grinding presents a number of challenges particularly in High-Efficiency Deep Grinding (HEDG). High work-speeds require fast response and deep cuts require measurement over a large temperature field. High-speed fluid delivery creates problems for all types of temperature measurement. Electrical noise may require zero-shift filtering. Several techniques of temperature measurement are described. The merits and problems using thermocouple techniques are discussed in detail. In particular, the effect of junction size and shape are discussed. It is shown that the shape and size of the junction have a strong effect both on the reliability of the signal and on the accuracy of the signal. Other problems discussed include improvement of signal to noise ratio, measurements under wet grinding conditions and a technique for measuring contact surface temperatures when taking deep cuts in creep grinding and high-efficiency deep grinding.