Study On Temperature Characteristics And Surface Texture Of Ruled Surface Impeller In Five Axis Side Milling

If the milling temperature couldn't be controlled well for ruled surface impeller in five axis side milling,it will not only destroy the cutting tool and the workpiece,but also affect the surface texture after processing.The milling temperature can be predicted by the temperature modeling and simulation in the process of the ruled surface impeller processing,so that the milling temperature can be controlled by changing milling parameters.The adverse effects of high temperature on the workpiece and the tool are reduced,and the better surface texture is obtained,with minimizing the spray cooling solution.Firstly,the milling temperature field model is established for the ruled face impeller in the five axis side milling.The heat production is analyzed in the various heat production areas by splitting the milling surface as micro elements,which is obtained in a tool rotational cycle.The model of milling temperature field is derived by the temperature rise model of the limited long line heat source.And the milling temperature field model is modified to ensure that the model is more consistent with the actual situation.It lays a theoretical foundation for the simulation of milling temperature field and the calculation of thermal deformation.Secondly,the temperature of the processing microelement is simulated on the basis of DEFORM.The complex surface of impeller blade is simplified to micro element surface.Therefore,the temperature field simulation of side milling aluminum alloy microelement plane and element plane,aluminum alloy microelement curved surface and micro curved surface is carried out respectively.Four conditions' results are obtained,including the temperature field of microelement and cutter at characteristic time,and the curve of temperature varies with time on the feature point in the whole process.The simulation process is simplified,providing data for machining the impeller blade and the simulation of the temperature field of "S".Thirdly,the temperature field and deformation field of the machining "S" and impeller blades are simulated on the basis of WORKBENCH.The simulation results of the milling microelement are applied to the impeller blade and the "S" specimen in the way of the line heat source load.Taking the aluminum alloy "S" specimen as the processing object,the experiment is designed,and the temperature change in the process is measured by thermocouple,which verifies the correctness of the simulation results.The,the recalculated temperature field is reapplied to two kinds of workpiece in the way of load,and the thermal deformation field is obtained.Finally,the influence model of the thermal deformation on the blade surface morphology is established and the direction of the surface texture is calculated.The principle of the influence of thermal deformation on the surface morphology is analyzed and the mathematical modeling is carried out.The instantaneous undeformed chip thickness of the workpiece after thermal deformation is calculated,and the surface morphology equation is established on the basis of it.The surface texture is calculated by the surface morphology equation,and the method of using edge detection to calculate the direction of surface texture is given.