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Force deformation error calculation method for pin roller linear guide rail pair under vertical loads

A roller linear guide, vertical load technology, used in computing, special data processing applications, instruments, etc.

Inactive Publication Date: 2015-09-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to obtain the calculation of the force deformation error of the roller linear guide pair under the vertical load, and further improve the calculation efficiency on the basis of ensuring the accuracy

Method used

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  • Force deformation error calculation method for pin roller linear guide rail pair under vertical loads
  • Force deformation error calculation method for pin roller linear guide rail pair under vertical loads
  • Force deformation error calculation method for pin roller linear guide rail pair under vertical loads

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Embodiment Construction

[0059] The present invention takes the four-slider workbench roller linear guide pair as the research object, calculates the force deformation error under the action of vertical load, and verifies the practicability of the present invention.

[0060] Step 1: Establish a three-dimensional model and calculate the external force on the roller linear guide pair.

[0061] Taking the sub-center of the base guide rail as the origin of coordinates, establish a 3D model of the upper body of the machine tool, such as Figure 5 shown. Set the material of the parts, the material of the guide rail and the slider is GCr15, isotropic, the medium is uniform, and the density of the material is 7800kg / m 3 ;The material of the main parts such as columns and beams is HT200, and the density is 7200kg / m 3 .

[0062] Using the quality attributes, the mass M of the upper body of the machine tool is obtained as 1731.41kg; then the gravity G of the upper body of the machine tool borne by the guide r...

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Abstract

The invention provides a force deformation error calculation method for a pin roller linear guide rail pair under vertical loads, and belongs to the precision design field of linear guide rail pairs. The method aims at obtaining deformation of the linear guide rail pair under the load action and improving calculation efficiency. A force deformation error of the pin roller linear guide rail pair is calculated in consideration of the action of the outer loads. Three-dimensional CAD software is used for parametric modeling, the stress condition of the pin roller linear guide rail pair is analyzed, and a mechanical analysis model of the guide rail pair is established under the action of the outer loads. A linear guide rail pair contact model is then researched, and an improved Palmgren formula is applied to analyzing the relation between elastic deformation and the corresponding load when a single pin roller makes contact with a groove. Loads borne by rolling bodies are solved according to the outer loads, elastic deformation quantities of the rolling bodies are worked out, and the displacement quantity of a sliding block is deduced and serves as the force deformation error of the whole linear guide rail pair. Finally, Matlab programming parametric modeling is applied, and the conclusion provides a theoretical basis for movement precision and service life calculation of rolling linear guide rails.

Description

technical field [0001] The invention relates to a method for calculating the force deformation error of a roller linear guide rail pair under the action of a vertical load, and belongs to the field of precision design of a linear guide rail pair. Background technique [0002] The roller linear guide pair is a new type of rolling support for relative reciprocating linear motion. The rollers between the guide rail and the slider roll to avoid direct contact between the guide rail and the slider, and the rolling friction replaces the sliding friction. It has positioning accuracy. High, small dynamic and static friction coefficient, good maintainability and other advantages, it has become a key functional component in industries such as CNC processing equipment, aerospace and industrial robots. The bearing capacity and rigidity of the roller linear guide pair are higher than that of the ball guide rail, but it is more sensitive to the parallelism error requirements of the guide ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 蔡力钢李丹丹刘志峰冯秋男赵宏伟
Owner BEIJING UNIV OF TECH
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