Temperature measurement analysis in the cutting zone during surface grinding

Barbara Jamuła

doi:10.21595/jme.2021.21894

Abstract

The grinding process is commonly used as the final stage of processing. It is used to produce elements that require more tolerance and smooth surface. Considering other processing, such as turning or milling, grinding requires very high energy input per unit volume of material removal. A significant proportion of this energy in the process turns into heat in the grinding zone, which leads to increased temperature. This paper describes and compares two methods of temperature measurement in the cutting zone during surface grinding. The study aimed to determine the differences in the results of temperature measurements using an indirect method, using an analysis of thermal images, and a direct method, using a thermocouple. Two different sets of measurement apparatus were used in the experiment: a thermal imaging camera and a thermocouple with appropriately selected software. The factors affecting the errors obtained with each of the above measurement methods are discussed and the resulting differences in the results are discussed.

Highlights

In recent years, there have been intensive developments in the use of abrasive machining in the manufacturing processes of machine parts
Summing up the analysis of the results obtained with a thermal imaging camera and recorder connected to thermocouple, it is possible to notice that the most accurate measurement method is the analysis of infrared images
Using the thermocouple is an effective way for temperature measurement; obtained values in studies can always be subject to higher errors than those obtained using a thermal imaging camera

Summary

Introduction

There have been intensive developments in the use of abrasive machining in the manufacturing processes of machine parts. The effects of grinding burns include: changes in hardness, the formation of residual stresses and microcracks in the surface layer, thermal and structural deformation of the workpiece [16, 17] They occur even when no physical defect is observed. The probability of the occurrence of grinding burns and other adverse effects associated with excessive temperature in the grinding zone is still high [26,27,28] Another important phenomenon that occurs during the grinding process is swarf infiltration on the active surface of the wheel. Malkin et al performed a study in which as much as 85 % of the thermal energy is transferred to the workpiece in the grinding process [20] For this purpose, temperature measurements in the contact area between the workpiece and the grinding wheel will be used. These measurements, taking into account variations in the individual machining parameters, will be used to estimate precisely that portion of the energy that is transferred from the grinding wheel to the workpiece

Research plan on the temperature in grinding process

Temperature measurement

Findings

Conclusions