Abstract
The paper deals with the effects of consistency of discharged mixture of liquid lubricant and compressed air for MQL (minimum quantity lubrication) on drilling. In MQL process, consistency of mixture of lubricant critically effects on its tool life and accuracy of the hole. However, it is very difficult to detect discharged mixture because of its quite few quantity and high speed.
In this study, at first, the relation of consumed quantity of lubricant and discharged amount from the mixing device was studied. Then measuring system for mixture sprayed with MQL on drilling was developed with optical dispersion detection principle. Results obtained were as follows.(a) Amount of mixture was practically measured at the cutting point of a drill. (b) Output signals from optical sensor was almost linear under 300ml/h discharged. And inclination was different at 40ml/h. (c) Average of signals output was not affected by discharged pattern. (d) Light source by luminous diode with visible ray made it possible to see the mixture directory.
