Research Of Five Axis Machining Center Tool Deformation Mechanism Under Thermal Coupling Condition

The ball milling cutter head now widely used in five axis machining center, nc machine tools,is an indispensable tool of automotive,aerospace and mould manufacture. The blade of shape because it is relatively complex, ball head shape of cutting condition, the cutting tool under complex axial force of the larger, milling force, milling temperature and vibration in peripheral milling, so it’s difficult to precise modeling ball head end mill milling process simulation was the great attention of engineering. At present, in the processing cutting tool deformation, vibration analysis become the key point.This paper mainly through the metal cutting theory and heat transfer theory, the mathematical model of the finite element analysis to provide the basis. Through ball milling cutters are calculated respectively in cutting process head shear surface milling cutter, knife-flocks contact surfaces and after milling cutter knife surface-work surface heat flux, after ball head for the temperature distribution of the milling cutter and thermal coupling provide theory basis. From the ball head of the milling cutter and the simplified model of the theoretical formula, the application that ball head milling cutters in cutting process of the tip of displacement and the thickness of the cutting changes. Through the finite element software AN SYS ball head end temperature distribution, and thermal deformation coupling simulation, as it under the particular parameter ball head milling cutters and, thereby, to figure the deformation after the actual processing to make important reference. And provides the application of finite method to analysis the system vibration method, cutting tool for later vibration analysis or other finite element lay the foundation. Through the simulation of natural frequency and vibration that, to determine whether the cutting parameters cause tool, improve the system dynamic performance resonance. The ball milling cutter head cut typical the workpiece and the complex real time measurement through the VMC650five axis machining center.Measurement in the process temperature, get complete cutting tool rod, workpiece and the tip of temperature change trend, which points to the finite element analysis provides actual basis.Through to the ball of the milling cutter head coupled of deformation and modal analysis and analysis of cutting parameters ball head milling cutters and the influence of the deformation workpiece precision, so as to put forward based on actual production process, improve the processing quality and service life of cutting tools, make the maximum economic benefits.