Key geometric error tracing method for multi-axis numerical control machine tool

A numerical control machine tool and geometric error technology, applied in program control, computer control, comprehensive factory control, etc., can solve problems such as large amount of calculation and complicated calculation process

Active Publication Date: 2022-01-21
ANHUI SCI & TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the invention patent CN108445839A, it is a geometric error identification method based on error increment, which has a relatively large amount of calculation and a relatively complicated calculation process

Method used

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  • Key geometric error tracing method for multi-axis numerical control machine tool
  • Key geometric error tracing method for multi-axis numerical control machine tool
  • Key geometric error tracing method for multi-axis numerical control machine tool

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Embodiment Construction

[0124] The present invention takes a five-axis elevated beam mobile gantry CNC milling machine as an example to verify the above-mentioned five-axis CNC milling machine machining accuracy prediction method.

[0125] Specifically include the following steps:

[0126] Step 1: Take the five-axis CNC machine tool as an example to establish the spatial error model of the machine tool;

[0127] Based on the theory of multi-body system kinematics, the structure of the machine tool and the relationship between each body are described by topological structure graph and low-order body array table, the geometric error of the CNC machine tool is analyzed, the generalized coordinate system is established, and the relationship between adjacent bodies is used. The feature matrix expresses the positional relationship, and the homogeneous transformation matrix is ​​used to express the relationship between multi-body systems;

[0128] Step 1.1 establishes the topology of the five-axis CNC mach...

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Abstract

The invention discloses a key geometric error tracing method for a multi-axis numerical control machine tool and belongs to the technical field of machine tool precision analysis. The invention particularly relates to a spatial motion error modeling method of the multi-axis numerical control machine tool based on a multi-body system theory, a machine tool machining precision prediction method based on a side edge milling principle and a key geometric error traceability analysis method. According to the method, a multi-axis numerical control machine tool space motion error model, a machining precision prediction model and a key geometric error traceability analysis model are established. In machine tool precision optimization design truncation, a multi-axis numerical control key geometric error is subjected to traceability analysis, so that a machine tool design engineer can accurately identify the key geometric error conveniently, and the influence weight of each geometric error on the machine tool machining precision can be obtained before machine tool precision optimization design; machine tool precision design is correctly guided, and a theoretical foundation is laid for numerical control machine tool precision optimization design work.

Description

technical field [0001] The invention relates to a method for tracing the source of key geometric errors of a multi-axis numerically controlled machine tool, belonging to the technical field of machine tool precision analysis. Background technique [0002] The machining accuracy of the CNC machine tool is an important indicator to measure its machining performance and an important manifestation of the country's machinery manufacturing capacity and development level. Precision optimization design is an effective way to improve the machining accuracy of machine tools. Due to the difference in the degree of influence of different geometric errors on the machining accuracy of the whole machine, if the CNC machine tool is optimally designed based on past design experience, the precision optimization allocation results are easily affected by subjective factors, resulting in excessively high or excessively high machining accuracy of the machine tool. Low. Therefore, it is necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/408
CPCG05B19/4086G05B2219/35356Y02P90/02
Inventor 陶浩浩李同杰陈丰张立勇王娟
Owner ANHUI SCI & TECH UNIV
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