Finite Element Simulation And Experimental Research On Micro-grinding Temperature Of Metal Material

As microscale products are widely used in more and more fields, how to produce parts with miniaturized size characteristics become a hot research topic in recent years, and it includes micro-grinding which can obtain a good surface quality. In the macroscopic field, the grinding process is easy to produce a lot of calories which afferent the workpiece, easy to cause thermal damage on the surface of the workpiece, and easy to reduce the abrasion-resistant capability of the workpiece. All of that can reduce the life and performance characteristics of the parts. In the field of micro scale, it is a difficult problem to measure temperature because of confined space operation and tiny grinding rods. From the point of process, we can’t apply the macroscopic grinding mechanism to the microscale grinding field just according to scale. Thus we can’t simply apply the macroscopic grinding temperature field to micro-grinding. But researching on temperature distribution and thermal damage mechanism of micro-grinding is significant in raising processed quality. The temperature field in micro-grinding is investigated through theory, finite element simulation and experimental analysis in this paper. The main content of the paper contains following:(1) The temperature field is theoretically investigated. The origin and spread of grinding heat is analyzed. The Fourier law and heat conduction equation are introduced. Different heat source temperature distributions are investigated for comparative analysis, and the temperature field in micro-grinding is investigated especially.(2) The grinding temperature in micro-grinding is studied by FEM. An individual single grit model to grind is build by ABAQUS. The effects of the grinding parameter, including grinding depth and spindle speed, on the grinding temperature and grinding force are analyzed. And micro-grinding temperature fields are studied, a series of temperature field moire diagrams and temperature graphs are got. (3) Thermometry system is build. The thermometry principle of thermocouple is analyzed and the thermometry system is build. Combine the features of micro-grinding, an appropriate method to measure the temperature is found.(4) The grinding temperature in micro-grinding is experimental studied. The effects of the grinding parameter on the grinding temperature and grinding force are analyzed on the basis of the experiment. Temperature graphs in micro-grinding are also got on the basis of the experiment. Meanwhile a contrast between the results of FEM and experimental results is made. Also there is no grinding burn through observing the ground surface.