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Static stiffness calculation and structural parameter design method for rolling linear guide rail pair

A technology of linear guide rail pairs and structural parameters, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as time-consuming solution, cumbersome modeling, and dependence, and achieve simple methods and high calculation efficiency High and reduce the effect of calculation error

Active Publication Date: 2021-12-14
SOUTHEAST UNIV
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Problems solved by technology

This method is cumbersome to model, time-consuming to solve, and depends on large-scale commercial software, and is not suitable for the calculation of the auxiliary angle stiffness of the guide rail

Method used

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  • Static stiffness calculation and structural parameter design method for rolling linear guide rail pair
  • Static stiffness calculation and structural parameter design method for rolling linear guide rail pair
  • Static stiffness calculation and structural parameter design method for rolling linear guide rail pair

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Embodiment Construction

[0087] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0088] A method for calculating the static stiffness of a rolling linear guide pair and designing structural parameters according to the present application includes the following steps:

[0089] Step S1: Put forward the assumption of linearization of the load and deformation outside the Hertzian contact area of ​​the raceway, simplify the contact relationship of the raceway junction into an equivalent spring model, and establish a flexible contact model of the ball raceway based on the Hertzian point contact theory and the finite element method. The flexible contact model of the ball raceway obtains the relationship between the contact force of the ball raceway and the deformation of the guide rail, ball and slider; specifically includes:

[0090] Establish the overall coordinate system in the ball linear guide, such as figure 1 Shown: Ball linear...

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Abstract

The invention relates to a static stiffness calculation and structural parameter design method for a rolling linear guide rail pair, which comprises the following steps of: S1, proposing a raceway Hertz contact area external load and deformation linearization hypothesis, simplifying a raceway joint part contact relationship into an equivalent spring model, and establishing a ball raceway flexible contact model based on a Hertz point contact theory and a finite element method; S2, considering the pre-tightening amount of balls in the ball linear guide rail pair raceways, and calculating the initial curvature center distance between the raceways at the positions of the balls; S3, calculating the vertical rigidity, the horizontal rigidity, the rotation angle rigidity, the pitch angle rigidity and the deflection angle rigidity of the ball linear guide rail pair; and S4, determining the value of the design variable corresponding to the maximum value of the rigidity of the ball linear guide rail pair system as the optimal value of the design variable, and designing the structural parameters of the rolling linear guide rail pair. The static stiffness value of the guide rail is calculated more accurately, simply and conveniently, and a technical method is provided for parameter design of the guide rail pair.

Description

technical field [0001] The invention relates to the technical field of static stiffness calculation methods for linear transmission structures, in particular to a static stiffness calculation and structural parameter design method for rolling linear guide rail pairs. Background technique [0002] The ball linear guide pair is an important part in the feed system of the machine tool, which has the functions of guiding, carrying and positioning. The static stiffness of the ball linear guide pair is an important performance index, which can not only reflect the bearing capacity of the guide rail, but also directly affect the dynamic performance of the machine tool. Therefore, the study of the static stiffness of the rolling linear guide pair has important scientific significance and engineering value for the field of machine tool design. The calculation of the static stiffness of the rolling linear guide is a necessary link in the design and selection of the ball linear guide....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14
CPCG06F30/23G06F30/17G06F2119/14
Inventor 蒋书运王天昱
Owner SOUTHEAST UNIV
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