Research On The Thermal Deformation Of Diamond Tool In Ultraprecision Cutting Of Aluminum Alloys

Because single-crystal diamond tool has excellent wear resistance, so its edgeradius can reach the nanoscale. SPDT technology using this tool for a variety ofworkpiece materials for processing. It can directly reach the optical surfaces withoutthe need for subsequent processing means. So ultra-precision turning technology areused to the processing of large mirrors in space. When cutting a large mirror, cuttingdistance can reach hundreds of kilometers, and resulted dramatic tool wear andmachining large temperature difference and so on, and then the tool generates athermal deformation which could affect machining accuracy.Therefore, the test ofultra-precision turning aluminum with diamond tool was took. The thermaldeformation of the tool was studied under ultra-precision cutting process on the basisof the law. The model of the thermal deformation was established.Than take the testvalidation.The finite element software was used to create a simulation model to study howcutting parameters and cutting tool geometry affects temperature and cuttingforce.The influence of the tool flank wear on the tool cutting temperature was studiedwhich provided a theoretical basis for the actual cutting tests.Considering these simulation results, orthogonal test of ultraprecision machiningaluminum was took with diamond tool. Infrared cameras was used to detect thecutting temperature, the results of the tool temperature in simulation was tested; thetest results with a confocal microscope the tool flank wear morphology, and a detailedorthogonal analysis of a height of flank wear value VB was took and established apredictive model of VB values which obtained cutting parameters and tool geometryparameters.Using relevant formulas to calculate the heat flux and cutting force duringcutting process and taking finite element software to simulate the thermal deformationof the tool in cutting process use the calculated numerical, got the simulation resultsof the thermal deformation of the tool. Built the experimental verification platform toget thermal deformation of tool to simulate turning in the heating process without thecutting fluid situation and with point heater for heating the tip of the diamond tool,and the simulation results was verified by the test.