Method and system for calculating static characteristics of hydrostatic guideway considering elastic deformation

Abstract

The invention discloses a method and system for calculating static characteristics of a hydrostatic guideway considering elastic deformation, relates to the technical field of mechanical design, and solves the technical problem that the calculation of the static characteristics of the hydrostatic guideway is too complex. According to the technical scheme, the oil film thickness and the oil outletliquid resistance of the hydrostatic guideway are calculated according to the hydrostatic theory under the condition that elastic deformation is not considered; the oil supply pressure of a hydrostatic guideway is divided into n equal parts, the step-by-step oil cavity pressure of the hydrostatic guideway step by step is calculated, the step-by-step oil cavity pressure is taken as a boundary condition, and the step-by-step elastic deformation of the hydrostatic guideway is calculated under the action of the step-by-step oil cavity pressure step by step by adopting a finite element method; thestep-by-step elastic deformation is accumulated to obtain the total elastic deformation of the hydrostatic guideway under the oil supply pressure. The static characteristics of the hydrostatic guideway are calculated according to the total elastic deformation. The influence of the elastic deformation on the static characteristics of the hydrostatic guideway can be simply, conveniently and accurately considered, so that the static characteristics of the hydrostatic guideway are accurately calculated.

Description

technical field [0001] The present disclosure relates to the technical field of mechanical design, in particular to a calculation method and system for static characteristics of a hydrostatic guide rail considering elastic deformation. Background technique [0002] The hydrostatic guideway is one of the key basic components commonly used in machine tools, and its static performance directly affects the machining accuracy of the machine tool. In recent years, in the design of machine tool static pressure guideways, on the one hand, it is necessary to increase the static pressure of the oil chamber to increase the stiffness of the guideway, and on the other hand, to pursue the lightweight design of the guideway system. Therefore, the elastic deformation caused by large load and light weight affects the static characteristics. impact cannot be ignored. [0003] At present, the fluid-solid coupling method is mainly used at home and abroad to carry out the calculation of the sta...

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Problems solved by technology

[0003] At present, the fluid-solid coupling method is mainly used at home and abroad to carry out the calculation of the static characteristics of the hydrostatic guideway considering the influence of elastic deformation. The static equilibrium equation is used to solve the static characteristics of the static pressure guideway, but the model is complex, the calculation is cumbersome, and the quantitative analysis is time-consuming

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