Method for calculating five-degree-of-freedom static stiffness of double-V dense ball type linear guide rail

Abstract

The invention provides a method for calculating five-degree-of-freedom static stiffness of a double-V dense ball type linear guide rail. The method comprises the following steps that 1, the initial pre-tightening amount among four rows of roller paths of the double-V dense ball type linear guide rail is calculated; and 2, according to the initial pre-tightening amount obtained through calculationin the step 1, the vertical rigidity / transverse rigidity / rotation angle rigidity / yaw angle rigidity and pitch angle rigidity of the double-V dense ball type linear guide rail are calculated respectively. By adopting the method for calculating the five-degree-of-freedom static stiffness of the double-V dense ball type linear guide rail, the static stiffness of the double-V dense ball type linear guide rail can be accurately calculated, and the method is suitable for the situation that the pin roller inclines relative to the roller path or the pin roller is modified.

Description

technical field [0001] The invention relates to a method for calculating the five-degree-of-freedom static stiffness of a double-V bead-type linear guide rail. Background technique [0002] Double V dense bead type linear guide is a typical rolling linear guide pair, because of its fast moving speed, low frictional energy consumption, high positioning accuracy, strong bearing capacity, high degree of modularization, convenient assembly and good interchangeability It is widely used in precision mechanical products such as high-precision machine tools. The static stiffness of the junction is an important performance index, and the static stiffness of the guide rail needs to be provided in the design of the guide rail and its accuracy compensation. [0003] At present, there are two main methods for obtaining the static stiffness of the double-V dense bead linear guide at home and abroad: (1) the test method, which directly obtains the static stiffness of the guide rail throug...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main methods for obtaining the static stiffness of the double-V dense ball linear guide at home and abroad: (1) the test method, which directly obtains the static stiffness of the guide rail through experiments, but requires the development of a special test bench, which will greatly increase The research and development cost of the enterprise, and it has a lag for the research and development of guide rail products

(2) Theoretical calculation method. This method simulates and calculates the five-degree-of-freedom static stiffness of the rolling linear guide by establishing a theoretical model. The corresponding relationship between them provides an effective reference for the research and development of the guide rail structure in the guide rail design stage. However, there are few theoretical calculation methods for the five-degree-of-freedom static stiffness of the double-V dense bead linear guide at present, and they cannot deal with the inclination or rolling of the roller relative to the raceway. The column is modified

Images