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Optimal design method for accuracy reliability of roller linear guide pair

A roller linear guide, optimized design technology, applied in the field of CNC machine tools, can solve problems such as insufficient consideration of dispersion and uncertainty

Active Publication Date: 2017-10-03
西安启工数据科技有限公司
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Problems solved by technology

However, this method does not fully consider the dispersion and uncertainty of relevant parameters in actual working conditions, and the roller linear guide pair is a key functional component, and the length of its accuracy retention is critical to improving the reliability of CNC machine tools. Critical

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  • Optimal design method for accuracy reliability of roller linear guide pair
  • Optimal design method for accuracy reliability of roller linear guide pair
  • Optimal design method for accuracy reliability of roller linear guide pair

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] refer to figure 1 , one A method for optimizing the design reliability of the accuracy of a roller linear guide pair, comprising the following steps:

[0052] Step 1. Establish the precision loss model of the roller linear guide pair δ V (S): When establishing the accuracy loss model of the guide rail pair, consider the two aspects of elastic deformation and wear, and establish the accuracy loss model δ V (S) The steps are as follows:

[0053] Step 1.1) Calculate the elastic deformation δ of the roller linear guide pair V1 :

[0054] It is assumed that the roller linear guide pair is subjected to the applied load F loaded vertically downward on the slider, and the normal load on the contact surface of each roller is Q n , the angle between the normal direction of the contact surface and the vertical direction is α, Z is ...

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Abstract

The invention provides an optimal design method for the accuracy reliability of a roller linear guide pair, aims to achieve the quantitative prediction of the accuracy reliability of the roller linear guide pair, and the accuracy reliability is improved. The method is achieved in the follow steps that a roller linear guide pair accuracy loss model delta V(S); an accuracy reliability limit state function delta X(X) is derived; an accuracy reliability mathematical model RFM, a mean sensitivity model and a variance sensitivity model are built; a random variable xi and a random variable xj are selected randomly; a dimension constraint and a reliability constraint of a multi-objective steady optimization model are created; in order to make the mean sensitivity of the random variable Xi minimum and the variance sensitivity of the random variable xj minimum, a multi-objective steady optimization model F (xi, xj) of the roller linear guide pair is built; a shortest ideal point method is used for optimization searching of the multi-objective steady optimization model of the roller linear guide pair, and the optimal solution of the random variable xi and the optimal solution of the random variable xj are obtained.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, and relates to an optimization design method for the accuracy reliability of a roller linear guide rail pair, which can be used for quantitative prediction and optimization improvement of the accuracy reliability of a roller linear guide rail pair. Background technique [0002] According to the principle of kinematics, the so-called guide rail is a device that constrains the moving component to only one degree of freedom. This degree of freedom can be linear motion or rotary motion, and the guide rail that does linear motion is called linear guide rail. Rolling linear guide is a device that bears fixation, guides movement and reduces friction. It is used in linear reciprocating motions. It has a higher rated load than linear bearings and can bear a certain torque. It can be used in high load situations. Realize high-precision linear motion. According to structural featur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2111/04
Inventor 王奇斌马洪波孔宪光程涵刘尧
Owner 西安启工数据科技有限公司
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