Electromechanical Coupling Analysis Of The Direct-driven Rotary Spindle Head Of The Milling-turning Compound Machining Center

This subject comes from the2010technology major projects "high-end CNCmachine tools and basic manufacturing equipment": moving beam without ramvertical milling-turning compound machining center project(special No.:2010ZX04001-032).The direct-driven rotary spindle head is the key technologies ofthe moving beam without ram vertical milling-turning compound machining center,using advanced direct-drive technology instead of traditional worm drive and geardrive mode, made zero transmission of the machine come true and made CNCmachine tool structure more simple, compact, higher system rigidity, reliability andaccuracy, faster dynamic response. The direct-driven rotary spindle head of milling-turning compound machining center have complex coupling relationship of multi-physical processes and multi-parameter variables, therefore there is necessity to doelectromechanical coupling analysis of the entire system, research the relationshipbetween each parameter variable, and each parameter variable how to effect on thesystem. The entire dynamic process of the system is completely determined by thestructure parameters of the system, which affect the specific features of the system.Therefore, when the direct-driven rotary spindle head of the milling-turningcompound machining center working, there will be a variety of problems, which willaffect the production quality and even lead to some major accidents in production.Especially in the production process, due to the load disturbances, theelectromechanical coupling phenomena happened when the system worked in thenon-stationary processes which have great dangers of the safe operation of the entireelectromechanical system. This is due to the mutual coupling of electrical par ametersand mechanical parameters of the direct-driven rotary spindle head system affect themechanical properties of the whole system. The reason which cause the device to anadverse state is that we have little deep-level research on the complexelectromechanical systems which have the multi-physical processes and multi-parameter coupling relationship, so this job proposes that electromechanical couplinganalysis of the direct-driven rotary spindle head of the milling-turning compoundmachining center, the mainly research is: This paper analyses the structure of the direct-driven rotary spindle head systemand the working principle of the torque motor and electric spindle, and establish theflux mathematical model of the torque motor and electric spindle.It analysis complex electromechanical coupling system,described the type ofcomplex electromechanical coupling and electromechanical coupling systemmodeling and solution method, considered from the perspective of theelectromechanical coupling, make the electromechanical coupling analysis for thedirect-driven rotary spindle head system, established the electromechanical couplingrelationship block diagram,visually expressed the complex coupling relationshipbetween the mechanical parameters and electrical parameters of the system, laid thefoundation for the establishment of electromechanical coupling mathematical modelof the direct-driven rotary spindle head.This paper regards the direct-driven rotary spindle head system as the researchobject, made kinematics analysis of the mechanism, based on the Lagrange-Maxwellelectromechanical coupling kinetic equation, established nonlinear strongly coupledelectromechanical dynamics mathematical model of the direct-driven rotary spindlehead system, finally based on Runge-Kutta algorithm to solve electromechanicalcoupling mathematical model of the direct-driven rotary spindle head system,provided a theoretical basis for the analysis of coupling relationship between thevarious parameters in the direct-driven rotary spindle head system.Based on the theory of mechanical vibrations, this paper make the vibrationanalysis of electromechanical coupling for torque motor, and establishedmathematical model of the torque motor dual-quality block-axis vibration, usingMatlab/Simulink simulation module, established simulation model of the torquemotor system,and analyze the impact mechanism of the current regulator parameters,damping, and load on the vibration of the electromechanical coupling, that have greatsignificance for the designment of the system parameters and improvement of thedynamic characteristics of the system.