Abstract
Based on the comprehensive analysis of the heat sources of the motorized spindle system, the thermal loads, including the heat generation of bearing friction and the electromagnetic loss of the built-in motor, are carried out for a machining center motorized spindle system. And then, the convective heat transfer coefficients of the whole spindle system are analyzed. The thermal characteristics of the motorized spindle system are calculated by finite element analysis. The steady state temperature field distribution of the motorized spindle is obtained. It provides some references for improving the thermal characteristics of the motorized spindle and reducing the difficulty of thermal error compensation.
Highlights
The motorized spindle system will produce deformation due to stress in the process, in addition to large amounts of heat, which can generate thermal deformation
A large number of studies have shown that in the factors that affect the accuracy of machine tool, the thermal error caused by external environment and internal heat sources are the largest error source of precision machining machine such as CNC(Computer Numerical Control) machine tools, which accounts for 40-70% of the total manufacturing error [1, 2]
Taking one motorized spindle system as the research object, the thermal characteristics of the spindle system are analyzed according to the load and boundary conditions calculated by the above thermal characteristic models
Summary
The motorized spindle system will produce deformation due to stress in the process, in addition to large amounts of heat, which can generate thermal deformation. These thermal deformations can short the working life of the spindle, and affect the processing accuracy of the machine tool. A large number of studies have shown that in the factors that affect the accuracy of machine tool, the thermal error caused by external environment and internal heat sources are the largest error source of precision machining machine such as CNC(Computer Numerical Control) machine tools, which accounts for 40-70% of the total manufacturing error [1, 2]. Using finite element software ANSYS, the steady temperature field of the motorized spindle system were obtained
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