High-speed motorized spindle thermal error modeling method based on bonding graph

Abstract

The invention discloses a high-speed motorized spindle thermal error modeling method based on a bonding graph. The method comprises the following steps: 1, constructing a high-speed motorized spindle bearing temperature field bonding graph model; 2, constructing a motor stator temperature field bonding graph model; 3, constructing a motor rotor temperature field bonding graph model; 4, according to the specific structure of the high-speed motorized spindle, connecting the temperature field bonding graph models established in the steps 1 to 3 to establish a complete high-speed motorized spindle thermal error system temperature field bonding graph model; 5, establishing a thermal error mathematical model of the high-speed motorized spindle; and 6, performing system simulation according to the model, and analyzing to obtain the thermal error of the high-speed motorized spindle. According to the method, a bonding graph modeling method is adopted, all parts are convenient to connect and add, the high-speed motorized spindle system temperature field with various energy forms can be directly modeled and analyzed; therefore, the problem that singular points which cannot be analyzed are generated is solved, and the rapidity and accuracy of modeling, simulation and analysis of the high-speed motorized spindle system are improved.

Description

technical field [0001] The invention relates to the technical field of high-speed electric spindle thermal error modeling, in particular to a bonding graph-based high-speed electric spindle thermal error modeling method. Background technique [0002] In the field of mechanical processing, the high-speed electric spindle is not only one of the core functional components of high-precision CNC machine tools, but also the main heat source of CNC machine tools. When analyzing the thermal error of the electric spindle, the separate analysis of the heating of the stator, rotor and bearings and other components ignores the combined effect of heat convection and heat conduction between the components, and the current simulation and analysis software such as ANSYS cannot analyze the singularity It is difficult to obtain an accurate mathematical model, and the error of the analysis result is relatively large. [0003] The bond graph method uses the state equation as a mathematical mod...

AI Technical Summary

Problems solved by technology

When analyzing the thermal error of the electric spindle, the individual analysis of the heating of parts such as stator, rotor and bearing ignores the comprehensive effect of heat convection and heat conduction between parts, and the current simulation and analysis software such as ANSYS cannot analyze the singularity It is very difficult to obtain an accurate mathematical model, and the error of the analysis result is relatively large.

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