Micro-CNC Grinding Machine Product Design And Simulation Based On Axiomatic Design Theory

With the rapidly development of technologies，micro-mechanical and microcomponents have been widely used. As the micro-grinding machine to save energies,space and resources, low manufacturing cost, can solve the technical problems that thetraditional tools do not, at the same time the micro-grinding is not limited by materialswhen it is processed, that are the advantages of widespread concern. The study ofmicro-grinding is a great significance for defense weapons and equipments’development. It can expand the space of LiaoNing Province in equipmentmanufacturing industries.Based on the current the micro-machine tools’ situation of the world in this paper,describing the necessity for micro-CNC grinding, introducing the micro-CNC grindingmachine for the micro-processing program. According to the program, making theconfiguration design and the simulation analysis of the micro-CNC grindingmachine.Specific contents of the thesis are as follows:First of all, Making the analysis and decomposition of micro-CNC grindingmachine on the function structure based on that Axiomatic Design Theory provides theframework to get the specific structure and composition of micro-grinding machine.According to the technical requirements to determine the overall structure and layout ofthe micro-CNC grinding. And do the specific structure of CNC micro-grinding machinedesign and selection of key components based on the d Axiomatic Design’s compositionresults.Secondly, Static and dynamic characteristic analysis of the spindle axis are madewith the help of the finite element analysis software. The static stiffness of themotorized spindle is made by the static characteristic analysis. The natural frequency、vibration mode shapes and critical rotation speed are obtained by the modal analysis.The maximum dynamic displacements of the front spindle, rotor shaft and the centrallocation and the end are made by harmonic response analysis. For high-speed spindle inthese three locations are analyzed maximum dynamic displacement calculation.Thirdly, making the modeling of the ball screws with the help of modelingsoftware and using the finite element analysis software to obtain the general ten steps natural frequency, vibration mode and the critical rotation speed by modal analysis.Last but not the least, establishing the finite element model of the lathe bed andgetting the first six natural frequencies and vibration modes by modal analysis. Findingthe type of diagram the existence of weak links by analyzing vibration modes. To ensurethe bed mass, stiffness and other requirements under the premise of the bed by thestructural design and size optimization, get a reasonable bed shape and size parametersto improve the dynamics of bed and ensure precision grinding.