The Research On Mechanics Properties Of Hydrostatic Slideway Of Large CNC Gear Hobbing Machine Tools

The hydrostatic slideway of worktable, of which mechanical properties can directly affect the machine's quality, lifetime and operation efficiency, is the important component of the large CNC gear hobbing machine. With the development of modern industry, the tendency of extreme demands on aspect of speed and bearing of NC machine made the higher requirement to mechanical properties of the hydrostatic slideway. Therefore, it is necessary to conduct deeply research on the mechanical properties of the hydrostatic slideway on the basis of the theory analysis, simulation calculation, and scientific experiment so as to enhance the bearing capacity of worktable, extend the service life and raise process precision as well.This paper mainly contains the following five contents:Firstly, before analyzing the present research condition of hydrostatic technology at home and abroad, expound synthetically the features and significance of hydrostatic slideway. And then introduce the study's object, content and major work.Secondly, aiming at the condition that current fuel supply system hasn't a upper adjusting accuracy of film thickness, a kind of self-adjusting film thickness is proposed, meanwhile a sort of fuel supply system of hydrostatic slideway that can be used to rotary table and increase the stiffness of film is designed, which builds up foundation of optimizing and designing the fuel supply system of hydrostatic slideway.Thirdly, the closed hydrostatic slideway working parameters of the YD31125CNC6 is theoretically calculated to provide the vital reference for choosing sensors in the performance test of hydrostatic slideway.Fourthly, the pre-processing software of FLUENT is used to set up the flow field model of hydrostatic slideway after the calculation model established. Then, do the mesh generation and set the boundary condition. In addition, the FLUENT is adopted to make the numerical simulation on the film pressure and flow field distribution in static environment. These results of study make sense to enlighten the optimal design about the structure of hydrostatic slideway.Finally, research the mechanical properties test of the hydrostatic slideway of the large CNC gear hobbing machine. According to the test purpose, the test worktable used to do the mechanical properties test of hydrostatic slideway is designed, which includes the design and checking of the loading mechanism, the design of the constant flow hydraulic system, the choice and installation of sensors, and the development of the acquisition software for testing system. After that, do the test depending on the test's steps and analyze the result which demonstrates the significant reality meaning to improve the slideway mechanical properties.