The Research On Structural Design Of Annular Drilling And Milling Machine Tool

Aggregate machine tools are designed for special parts and special working procedures. They are indispensably in automatic product line. In the industrial production to large-scale workpiece, such as turntable and ring beam, the processing of drilling and milling, general machine tools are more difficult, with high processing costs, but cannot guarantee accuracy. Annular drilling and milling machine tool is designed for these workpieces and special working procedures, the cross-beam can rotate 360, and uses closed-loop control system, which greatly improved the precision of producing parts and has more the degree of automatization, which got a high productivity. The thesis is to do some exploring to modern design method of aggregate machine tool.In this thesis, began with the intension and significance of designing annular drilling and milling machine tool, introduced the development status of internal and overseas manufacturing and aggregate machine-tool, and designed the overall project of the machine tool, have completed the design and examination respectively on various parts of the machine tool in detail. CATIA, the 3-D modeling software is used to establish the solid models of the machine tool.FEM (Finite Element Analysis) is a fast and good efficient design tool in modern engineering analysis and design. The application of Finite Element analysis and structure optimum etc CAE technology is significant in shortening the period of production development, reducing the cost of the manufacture and improving the enterprise competitive ability. In the thesis, the large-scale finite element analysis soft-ANSYS is used to static analysis, modal analysis of machine body cross-beam of annular drilling and milling machine tool. In static analysis, the deformation figure, stress figure of cross-beam of machine body are listed. In modal analysis, the first-ten-step frequencies, amplitudes of vibration and vibration modes are listed, then we analysis its dynamic characteristics. By the static analysis, it is verified that the structure design of crossbeam meet the demands of design and that the design scheme of the machine tool is feasible, and analyzed the precision of the machine.