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Probabilistic Analysis Method for Continuous Fault Propagation of CNC Lathe

A CNC lathe, fault propagation technology, applied in metal processing equipment, measuring/indicating equipment, metal processing machinery parts, etc., can solve problems such as spindle damage, affecting the accuracy of fault diagnosis and troubleshooting efficiency, equipment failure, etc.

Active Publication Date: 2021-04-06
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fault propagation probability of CNC machine tool components is an important parameter to evaluate its fault propagation behavior characteristics in the system and describe its fault propagation ability. Troubleshooting efficiency, a common method is to use fault injection, where fault injection is to artificially impose fault incentives on equipment when looking for fault propagation paths or evaluating fault propagation probability in the equipment’s fault-free working state, so as to cause equipment faults or accelerate system failure speed
[0003] The existing fault injection is to use the tapping method to inject faults when the spindle is in a state of high-speed rotation. However, there are great safety hazards in actual operation, and the movement of the spindle is a vibration-sensitive component. Improper tapping will cause damage to the spindle. In the fault injection of other aspects, there is no better operation method, so there is a large room for improvement

Method used

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  • Probabilistic Analysis Method for Continuous Fault Propagation of CNC Lathe
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  • Probabilistic Analysis Method for Continuous Fault Propagation of CNC Lathe

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Embodiment 1

[0030] The present invention provides a technical solution: a method for analyzing the probability of continuous fault propagation of a CNC lathe, including the spindle, guide rail, and tool holder in the CNC lathe to be analyzed, and performing fault injection on the three during normal processing, followed by analysis and detection, wherein Normal processing status includes:

[0031] 1. There needs to be a tool conversion process in the processing, that is, the work task of tool change processing must be included, and the relevant signal information of the tool holder rotation and tool position conversion during the tool change process can be tested and collected;

[0032] 2. Close to the process in normal production, the shape design of the workpiece is typical and close to the actual production and processing. Under the premise of realizing the test purpose, the most common workpiece shape in CNC lathe processing, that is, the outer circle processing and cutting process is ...

Embodiment 2

[0050] The present invention provides a technical solution: a method for analyzing the probability of continuous fault propagation of a CNC lathe, including the spindle, guide rail, and tool holder in the CNC lathe to be analyzed, and performing fault injection on the three during normal processing, followed by analysis and detection, wherein Normal processing status includes:

[0051] 1. There needs to be a tool conversion process in the processing, that is, the work task of tool change processing must be included, and the relevant signal information of the tool holder rotation and tool position conversion during the tool change process can be tested and collected;

[0052] 2. Close to the process in normal production, the shape design of the workpiece is typical and close to the actual production and processing. Under the premise of realizing the test purpose, the most common workpiece shape in CNC lathe processing, that is, the outer circle processing and cutting process is ...

Embodiment 3

[0070] The present invention provides a technical solution: a method for analyzing the probability of continuous fault propagation of a CNC lathe, including the spindle, guide rail, and tool holder in the CNC lathe to be analyzed, and performing fault injection on the three during normal processing, followed by analysis and detection, wherein Normal processing status includes:

[0071] 1. There needs to be a tool conversion process in the processing, that is, the work task of tool change processing must be included, and the relevant signal information of the tool holder rotation and tool position conversion during the tool change process can be tested and collected;

[0072] 2. Close to the process in normal production, the shape design of the workpiece is typical and close to the actual production and processing. Under the premise of realizing the test purpose, the most common workpiece shape in CNC lathe processing, that is, the outer circle processing and cutting process is ...

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PUM

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Abstract

The invention discloses a method for analyzing the probability of continuous fault propagation of a CNC lathe, including the spindle, guide rail, and tool holder in the CNC lathe to be analyzed, performing fault injection on the three during normal processing, and then analyzing and detecting the fault of the spindle Injection and measuring point selection include the following steps: Step 1: Connect the connecting rod of the magnetic gauge base with the magnetic base, wherein the magnetic base is attracted to the bed of the machine tool, and one end of the connecting rod of the magnetic gauge goes deep into the wrench hole of the upper chuck; Using the fault injection method, taking the spindle, guide rail, and tool holder of the kinematic coupling components in the machining process as objects, the vibration information of each system component under typical cylindrical machining conditions is collected, and the energy operator is introduced to evaluate the components by calculating the vibration energy transfer efficiency. Fault propagation behavior characteristics to realize continuous fault propagation probability evaluation of CNC lathe.

Description

technical field [0001] The invention belongs to the technical field of continuous fault diagnosis and analysis of numerical control lathes, and in particular relates to a method for analyzing the probability of continuous fault propagation of numerical control lathes. Background technique [0002] The fault propagation probability of CNC machine tool components is an important parameter to evaluate its fault propagation behavior characteristics in the system and describe its fault propagation ability. Troubleshooting efficiency, a common method is to use fault injection, where fault injection is to artificially impose fault incentives on equipment when looking for fault propagation paths or evaluating fault propagation probability in the equipment’s fault-free working state, so as to cause equipment faults or accelerate system failure speed. [0003] The existing fault injection is to use the tapping method to inject faults when the spindle is in a state of high-speed rotat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00B23Q17/09
CPCB23Q17/00B23Q17/007B23Q17/0971
Inventor 龙哲谷东伟
Owner CHANGCHUN UNIV OF TECH