The Analysis And Coupling Study Of HMC80 Horizontal Machining Center Motorized Spindle Thermal Characteristic And Dynamic Characteristic

Motorized spindle structure design, thermal and dynamic characteristics not only largely determine the quality of high-speed CNC machine tools and cutting processing capability, but also affect the machining accuracy an important factor. Motorized spindle thermal characteristics and dynamic characteristics of the study, to further improve the work performance of high-speed machine tools is very important. In this paper and to the HMC80 motorized spindle as an example. To achieve high-speed spindle, high accuracy as the goal, using the finite element method, the use of ANSYS software, Spindle thermal and dynamic characteristics study, the specific work as follows:1. Analysis of dynamic characteristics of motorized spindleDetermine the type of motorized spindle bearing support and before and after bearing radial stiffness were calculated. Establishment three-dimensional finite element model for motorized spindle dynamic analysis,using ANSYS software for motorized spindle modal analysis and harmonic characteristics analysis.Analysis of spindle vibration modes, natural frequencies and critical speed. Calculation of the spindle in the general condition of the cutting force and study the frequency of motorized spindle dynamic response of the front face of the displacement.The main measures to improve the dynamic characteristic of the motorized spindle are put forward.2. Analysis of thermal characteristics of Motorized spindleDetermine the boundary conditions and thermal loads of motorized spindle thermal analysis. Using ANSYS software, thermal Characteristics of motorized motorized spindle for finite element analysis, mainly for steady-state thermal analysis and thermal structural coupled analysis. Analysis of motorized spindle temperature changes and temperature distribution of motorized spindle thermal deformation and thermal stress distribution analysis and discussion of temperature effects on spindle performance. The main measures to improve the thermal characteristic of the motorized spindle are put forward .3. The coupling of thermal and dynamic characteristicsThe results obtained by the impact of the front motorized spindle dynamics and thermal characteristics of the key factors, thereby establishing thermal and dynamic characteristics of contact, application of ANSYS software to set up the finite element analysis coupled model, as the main characteristics of the thermal state and the relationship between the dynamic characteristics make qualitative analysis.