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A method and system for real-time evaluation of machine tool health status

A technology of health status and evaluation method, applied in the field of machine tool failure warning and health assurance, can solve problems such as poor anti-interference ability and poor machine tool physical examination results, and achieve the effect of improving accuracy and reliability

Active Publication Date: 2022-08-02
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the special G-code physical examination mode is easily affected by machine parameters and servo parameters. When the dynamic characteristics of the machine tool change, the machine tool physical examination results will deteriorate and the anti-interference ability will be poor.

Method used

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  • A method and system for real-time evaluation of machine tool health status
  • A method and system for real-time evaluation of machine tool health status
  • A method and system for real-time evaluation of machine tool health status

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specific Embodiment

[0054] The health status evaluation of the spindle in the HNC8 CNC system includes the following steps:

[0055] S1. Run the machining G code, and the CNC system collects the electrical control data of the machine tool spindle in the non-cutting process by the fixed-point sampling method according to the configured self-check i command as a steady-state sample;

[0056] S2. Extract the characteristic index from the steady-state sample (take a sampling point as an example), as shown in Table 1:

[0057] Table 1

[0058]

[0059] Express the result in the form of a vector, that is, the feature index X h =(0.9995,21.4,12.8,1004,21);

[0060] S3. Since some characteristic indicators are affected by servo control parameters, parameterization is required to eliminate the influence. For example, the spindle speed change rate of the spindle servo parameters of the machine tool is a=2000r / (min*s). Remove the working conditions according to the formula, and get the characteristic ...

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Abstract

The invention belongs to the field of machine tool fault early warning and health assurance, and specifically discloses a real-time evaluation method and system for machine tool health status, which includes the following steps: S1. During the operation of the machine tool, collect the electrical control data of the non-cutting process as a steady state Sample; S2, extract characteristic index from steady state sample, obtain machine tool health index according to characteristic index and ideal index in health state, and evaluate machine tool health state according to machine tool health index. In order to eliminate the influence of the dynamic characteristics on the health state of the machine tool, the present invention uses the non-cutting process data as a sample for analyzing the health state of the machine tool. Then the machine tool health state is evaluated, which improves the accuracy and reliability of the machine tool health state evaluation.

Description

technical field [0001] The invention belongs to the field of machine tool failure early warning and health protection, and more particularly relates to a real-time evaluation method and system for machine tool health status. Background technique [0002] In the field of equipment failure warning and health protection, the health protection of machine tools is an important measure for efficient production of machine tools. CNC machine tools stop production due to failures or reduce processing quality due to performance degradation, which will bring certain economic losses, and may even cause safety production accidents due to machine tool failures. Therefore, the machine tool equipment in the factory needs to carry out health protection related work to reduce the probability of machine tool failure and ensure efficient production. At present, the health protection methods of machine tools mainly include the following: [0003] The first one is post-failure maintenance: high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4065
CPCG05B19/4065G05B2219/37616
Inventor 周浩杨建中周会成向华周谋
Owner HUAZHONG UNIV OF SCI & TECH
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