Calculation On Temperature Field Of Super-Thin Cutting Plastic Material

With the rapid development of science and technology, people are getting higher andhigher requirement for the performance of the product，precision and ultra-precisioncutting technology has also got rapid development. In the process of cutting, most of theenergy is converted to heat energy, the analysis of cutting heat is very important. Studieson cutting temperature are mostly concentrated in the conventional cutting, less inultra-thin cutting, especially in the theoretical analysis. From a theoretical point of view,the article tries to draw the distribution law of heat in the process of ultra-thin cuttingthrough heat source method.(1) According to the characteristics of the ultra-thin cutting, a ultra-thin2Dorthogonal cutting model of cutting plastic material is established. According to the forcedistribution in the process of ultra-thin cutting, the thesis analyzed force-balance relations,calculated the cutting force, and then deduced the consumption of energy in the process ofultra-thin cutting which laid the groundwork for calculating ultra-thin cutting temperaturefield.(2) The geometry model of ultra-thin cutting heat conduction is built by the Fourier’slaw of heat conduction. The heat source of cutting is divided into three parts: tool/chipfriction area, shear zone and tool/workpiece friction area. Considering the character ofrake face friction and the fillet radius of cutting edge, this article analyzes shape, positionand value of heating source. The point temperature rise formula impacted by heat sourceof tool/chip and tool/workpiece friction area, which is regarded as plane heat source, isobtained using heat source method. The point temperature rise formula impacted by sheararea heat source which is regarded as volumetric heat source instead of surface isobtained.(3) Take for example PCD tool cutting ultra-thin silicon aluminum alloy,as the finiteelement model of the cutting is established, get the distribution rule of temperature field ofsilicon aluminum alloy when it is ultra-thin cut by PCD tools. Then the article comparessimulation results and analytical results from the point of change rule of cutting temperature with the change of cutting thickness, the radius of cutting edge, and the toolrake angle, which is very close.