Finite Element Analysis Of Main Components Of Turning And Milling Machining Center And Mechanical Fault Diagnosis Of Bearings

The turning and milling machining center combines the respective process characteristics of the turning method and the milling method to achieve high efficiency and high precision machining with uniform process and standard.The saddle,headstock and base are the main components of the turning and milling machining center.The design parameters,strength and displacement deformation under load will directly affect the machining accuracy of the machine tool.With the accelerated upgrade of domestic machine tools,it is particularly important to solve the dynamic characteristics of its m ain structural components and to find faults in its processing as early as possible.This project takes the JML-350 turning and milling machining center as the research object,and uses Inventor finite element analysis software to analyze the stress strain,displacement deformation and other performance of the main components of the turning and milling machining center.Improvements have been proposed in areas where structural optimization is needed.At the same time,by using the vibration analysis method based on signal processing technology,taking the bearing as an example,a multistable stochastic stochastic resonance method based on periodic potential function is proposed to realize the early fault weak feature of the rotating parts of the turning and milling center.Optimal enhancement and extraction.The main research contents are as follows:1.Analyzing the dynamic characteristics of machine tools from the basic theory of modal analysis and finite element theory.Through comparison,the superiority of the research theory of the dynamic characteristics of the test method and the assumptions,analysis methods and steps of the modeling are clarified.2.Explaining the basic principle of the center of gravity driving method,and then applying this method to the model as well as analyzing the driving mechanism of the turning and milling machining center,and at length deriving the mathematical equation.The processing method of the influencing factors of the machine tool joint surface is expounded.At the same time,the dynamic characteristics of the machine tool are analyzed under certain assumptions and the applicability of the method is proved by the characteristic parameter formula.3.Using Autodesk Inventor Professional software as the finite element analysis tool for machine tools.The dynamic characteristics of the saddle,sliding seat,headstock,tailstock,tailstock track,tailstock floor and base of the turning and milling center are analyzed separately.According to the design requirements,the load and restraintare applied to the maximum,and the mechanical structure is compared.Material physical property parameters,analysis of stress,strain,displacement,safety factor and other major data values.Finally,based on the analysis results,the correctness of the design parameters is verified.It points out the position of the parts that need to be optimized and provides a simple,fast and reliable method for analyzing the dynamic characteristics of the design and manufacture of the turning and milling center.4.A new adaptive multi-stable stochastic resonance method based on periodic potential function is proposed,which can not only utilize noise enhancement and extraction fault features,but also adaptive control of stochastic resonance by changing the steady state number and the position of well width deep well.To achieve fault diagnosis of high-speed and high-precision machine tool bearings.