| Multifunctional and compound CNC lathe is more and more widely used in the mechanical processing with its advantages of high efficiency,economy and wide application,which solves the problems of process that is not concentrated and low efficiency of production and so on.Therefore,the superiority of the compound is more and more outstanding.CNC Turn-milling lathe is one tape of the multifunctional and compound CNC lathe.Among them,and it is based on the large and medium-sized CNC Turn-milling lathe,which is applied in the construction equipment,mining machinery and equipment,water conservancy equipment and other large equipment in the processing of parts.Because the demand for the speed of spindle,machining efficiency and economy of high speed,economical CNC Turn-milling lathe of Medium and small-sized is increasing,there are many problems in the development process and nowadays,the demand for the small quantities market and personalized production is increasing.This paper relying on the cooperation between school and enterprise,is to solve these problems as the starting point,which participating in the project of the development of a Medium and small-sized and high speed,economical type of CNC Turn-milling lathe of a CNC lathe production enterprise in Jia Xing,Zhejiang,Because the spindle assembly is one of the core parts in the machine and its performance is one of the main indicators of the evaluation of lathe performance,the focus of the work on the structural design and performance analysis of the spindle assembly of this lathe in this paper.The main research contents of this paper are as follows:(1)According to the technical parameters and specifications of CXK6130 CNC Turn-milling lathe,it was designed the structure,checked and selected the main components of its spindle assembly.Including motor selection,the selection of spindle bearings,configuration and check,the selection of belt pulley,the preliminary design of the spindle structure was checked.(2)CATIA 3D modeling of spindle assembly was built,and then loading the model into ANSYS Workbench finite element analysis software,and detailed analysis of static characteristics of the spindle by using ANSYS Workbench was made.Besides,according to the analysis and results,It was proved that the static stiffness of the spindle assembly of the lathe met the design requirements of the lathe.(3)First of all,using ANSYS Workbench to analysis the dynamic characteristics of spindle assembly,and using the classical transfer matrix method with MATLAB to calculate the natural frequencies of the spindle assembly and first order vibration type;secondly,through on the first order vibration mode analysis verified the rationality of the analysis result of ANSYS Workbench dynamic characteristics;then,to build a experimental system and testits dynamic characteristics,and the result was got,through compared with ANSYS Workbench’s,the result wasthe inherent frequency error of the spindle components was controlled within 4.25%;Finally,the influence of the change of spindle structure parameters on the static and dynamic characteristics of the spindle assembly was analyzed.(4)By analyzing the unbalanced inertia force of the spindle assmbly,and testing the dynamic balance of the spindleassembly,and finally come to the spindle assembly to meet the balance of CXK6130 CNC Turn-milling lathe.For reducing the imbalanced inertia force in the further,the measures was gave.(5)For solving the probelm of CXK6130 CNC Turn-milling lathe spindle positioning locking,and designed a spindle disc brake part of simple assembly,compact structure,reliable locking and good generality. |
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