Experimental investigation of temperature in the cutting zone in microgrinding

Abstract

 The article describes the technique and results of experimental studies of micromechanical processing – microgrinding. The main goal of the conducted experiments is the approbation of the developed thermophysical model of microgrinding. This model avoids a large number of experiments with changing materials, technical requirements and production conditions.

As the processed material, K-8 grade glass is chosen, which is the most popular material for manufacturing optical and medical devices, such as lenses, prisms, lasers, cuvettes for hemoglobins, etc. The material of the cutting part of the microgrinding tool is polycrystalline diamond.
To collect data on cutting forces, the Kistler dynamometer was used. For research and collection of data on the cutting temperature, a unique technique was used, which makes it possible to obtain a thermal imager and image processing using pixels. This technique allows you to record
the temperature at any time, and also clearly associate it with the known value of the pixel dimensions.

During the experiments it was found that from the filing of feed, the processing time. It was found that the increase in feed rate leads to an increase in temperature, however, the character of the dependence is not linear. In addition, a certain time of running-in of the cutting tool, characterized by temperature stabilization. The nature of heat distribution in the workpiece is also revealed. The collected data allow to test the developed thermophysical model and to calibrate the computer program complex.