Full working stroke thermal error compensation method of numerically-controlled machine tool feeding system and implementation system thereof

A technology of feed system and CNC machine tool, applied in manufacturing tools, metal processing, automatic control devices, etc., can solve the problems of complex selection of thermal key points, analysis methods such as thermal mode and thermal sensitivity cannot meet the requirements, etc.

Inactive Publication Date: 2012-09-19
SICHUAN UNIV
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Problems solved by technology

Because the main heat source of the feed system is moving, the selection of thermal key points is more complicated. The existing thermal key point selection technology at home and abroad is mainly based on engineering experience, and the analysis methods such as thermal mode and thermal sensitivity cannot meet the requirements. Require

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  • Full working stroke thermal error compensation method of numerically-controlled machine tool feeding system and implementation system thereof
  • Full working stroke thermal error compensation method of numerically-controlled machine tool feeding system and implementation system thereof
  • Full working stroke thermal error compensation method of numerically-controlled machine tool feeding system and implementation system thereof

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Embodiment Construction

[0062] In order to facilitate a clearer understanding of the present invention, the details of the present invention will be further discussed in detail below in conjunction with the accompanying drawings and examples completed according to the technical solutions of the present invention.

[0063] 1 Thermal experiment of CNC machine tool feed system

[0064] In order to study the variation law of the thermal error of the feed system of the machine tool, the present invention designs a corresponding experimental scheme. The program includes three parts: the purpose of the experiment, the experimental equipment and the experimental method, which are as follows:

[0065] ① Purpose of the experiment

[0066] Through thermal experiments, we can understand the temperature change law of the machine tool feed system and the distribution of heat sources, and determine the change trend of thermal error with temperature rise. The collected temperature and thermal error experimental da...

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Abstract

The invention discloses a full working stroke thermal error compensation method of a numerically-controlled machine tool feeding system and an implementation system thereof. Reduction of whole machine machining accuracy is mainly caused by thermal errors of the numerically-controlled machine tool feeding system, and a whole set of the technical scheme for measuring, analyzing and compensating the feeding system is provided. Application techniques of thermal error measurement, thermal key point identification, thermal error compensation modeling and thermal error on-line compensation of the numerically-controlled machine tool feeding system under typical working conditions are surveyed. On that basis, a thermal error on-line compensation system of the numerically-controlled machine tool feeding system is constructed. Taking an X-direction high-speed feeding system of a Longmen numerical control machining center in a certain model as an example, measurement, analysis and modeling compensation of the thermal errors are carried out respectively, and compensation effects are obvious. The full working stroke thermal error compensation method can be used for solving the thermal error compensation problem of the numerically-controlled machine tool feeding system and provides technical supports for machining accuracy and stability of a numerically-controlled machine tool.

Description

1. Technical field [0001] The invention relates to an error compensation technology for a feed system of a numerical control machine tool, in particular to a thermal error compensation method for a feed system of a numerical control machine tool and an implementation system for implementing the method. 2. Background technology [0002] With the continuous advancement of CNC machine tools and parts design, manufacturing, assembly technology and materials and other related technologies, the proportion of geometric errors, tool wear, and servo errors in the overall errors of CNC machine tools has gradually decreased. Under the conditions of high-speed and high-precision machining, thermal deformation has increasingly become an important factor affecting the machining accuracy of machine tools. In high-speed precision CNC machine tools, thermal errors account for 40% to 70% of the total error of the machine tool. Therefore, reducing thermal error is an important way to improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q11/00B23Q15/06B23Q23/00
Inventor 殷国富阳红方辉
Owner SICHUAN UNIV
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