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Method for constructing geometric error model of rolling guide feed system

A feed system and geometric error technology, which is used in the acquisition of the geometric error of the rolling guide feeding system and the construction of the geometric error model of the rolling guide feeding system, which can solve the problems of not considering the deformation of the guide rail and the contact load, etc.

Active Publication Date: 2016-06-08
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The influence of guide rail accuracy on the accuracy of the feed system is the result of the joint action of guide rail accuracy and guide rail stiffness. The current research has not pointed out the mechanism of the influence of guide rail accuracy on system accuracy. The influence of external force on system accuracy assumes that the contact pressure of the joint is uniform. Distribution, without considering the deformation and contact load caused by the forced fit of the guide rail itself

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  • Method for constructing geometric error model of rolling guide feed system
  • Method for constructing geometric error model of rolling guide feed system
  • Method for constructing geometric error model of rolling guide feed system

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Embodiment Construction

[0018] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0019] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those concepts and embodiments described in more detail below, can be implemented in any of a number of ways, which should be the concepts and embodiments disclosed by the present invention and not Not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

[0020] According to a preferred embodiment of the present inventi...

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Abstract

In allusion to the machine tool feed systems taking linear rolling guides as bearing and guiding mechanisms, the invention discloses a method for modeling force deformation error of a feed system through comprehensively considering the coupling influences, on the precision of the feed system, caused by the precision and rigidity of the a guide under the action of external force. The method comprises the following steps: firstly estimating the contact rigidity of the guide through an equivalent load method; establishing a load balance equation of a worktable taking sliding blocks as supports; determining a geometric deformation relationship among the sliding blocks according to rigidity assumption of the worktable; and complementing an equation according to the physical relationship series between the deformation and the force, and finally establishing an equation to solve the force deformation error of the feed system. According to the method, the blank of the coupling influences, on the precision of the system, caused by the precision and rigidity of the guide under the action of external force is filled, and favorable application prospect is provided for researching the force error of machine tools.

Description

technical field [0001] The invention relates to the field of stiffness and precision research of a machine tool feed system, in particular to a method for constructing a geometric error model of a rolling guide rail feed system and a method for obtaining the geometric error of the rolling guide rail feed system. Background technique [0002] The feed system of CNC machine tools is a key component that affects the accuracy of CNC machine tools. Its quality and performance have a great impact on the machining accuracy, precision retention and reliability of CNC machine tools. The geometric accuracy of the feed system can also be called the geometric error, which mainly comes from the errors of the feed system components themselves, and the forced fit of the feed system components due to external force, heat, shape and position errors and assembly errors between the feed system components, etc. These deformations will eventually be transmitted to the table or spindle, forming g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 徐尧刘庭煜
Owner NANJING UNIV OF SCI & TECH
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