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Graphical representation analysis method for performance degradation of lead screw pair and guide rail pair

An analysis method and technology of screw pair, which are applied in measuring/indicating equipment, metal processing mechanical parts, metal processing equipment, etc., can solve the problem of not being able to locate the screw pair, improve performance and service life, and ensure processing quality. Effect

Inactive Publication Date: 2013-12-11
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the rated life in the sense of probability and statistics can be calculated by the formula calculation method, it cannot locate the faulty part of the screw pair and guide rail pair, so it cannot provide more information for the maintenance and design of the screw pair and guide rail pair. Detailed and accurate monitoring basis to improve the performance and service life of screw pair and guide rail pair

Method used

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  • Graphical representation analysis method for performance degradation of lead screw pair and guide rail pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This example is a graphical analysis method for the performance degradation of the screw pair, and the steps are:

[0053] a. Signal collection:

[0054] The vibration sensor installed on the screw nut of the new screw pair, the vibration signal s of the new screw pair during the movement of the screw nut from one end of the screw to the other end through the data acquisition equipment 1 The signal is transmitted to the computer, and the computer records the signal in real time 1 ;

[0055] Replace the new lead screw pair with the faulty lead screw pair of the same specification, repeat the above operations, and obtain the vibration signal s of the faulty lead screw pair 2 ;

[0056] Then replace the faulty lead screw pair with the same specification to be evaluated lead screw pair, repeat the above operation again, and obtain the vibration signal s of the to-be-evaluated lead screw pair 3 ;

[0057] b. Signal subdivision:

[0058] The vibration signal s of the ne...

Embodiment 2

[0075] This example is a graphical analysis method for the performance degradation of the screw pair, and the steps are:

[0076] a. Signal collection:

[0077] The vibration sensor installed on the screw nut of the new screw pair, the vibration signal s of the new screw pair during the movement of the screw nut from one end of the screw to the other end through the data acquisition equipment 1 The signal is transmitted to the computer, and the computer records the signal in real time 1 ;

[0078] Replace the new lead screw pair with the faulty lead screw pair of the same specification, repeat the above operations, and obtain the vibration signal s of the faulty lead screw pair 2 ;

[0079] Then replace the faulty lead screw pair with the same specification to be evaluated lead screw pair, repeat the above operation again, and obtain the vibration signal s of the to-be-evaluated lead screw pair 3 ;

[0080] b. Signal subdivision:

[0081] The vibration signal s of the ne...

Embodiment 3

[0097] This example is a graphical analysis method for the performance degradation of the guide rail pair. The steps are:

[0098] a. Signal collection:

[0099] The vibration sensor installed on the guide rail slider of the new guide rail pair, the vibration signal s of the new guide rail pair during the process of moving the guide rail slider from one end of the guide rail to the other end through the data acquisition equipment 1 The signal is transmitted to the computer, and the computer records the signal in real time 1 ;

[0100] Replace the new guide rail pair with a faulty guide rail pair of the same specification, repeat the above operations, and obtain the vibration signal s of the faulty guide rail pair 2 ;

[0101] Then replace the faulty guide rail pair with the same specification to be evaluated guide rail pair, repeat the above operation again, and obtain the vibration signal s of the to-be-evaluated guide rail pair 3 ;

[0102] b. Signal subdivision:

[01...

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Abstract

The invention provides a graphical representation analysis method for performance degradation of a lead screw pair and a guide rail pair. According to the method, vibration signals measured by the lead screw pair or the guide rail pair are divided into a plurality of sections along the lead screw pair or the guide rail pair, in addition, the signals of each section are respectively subjected to feather extraction, then, the extracted feature values are subjected to normalization comparison with a new lead screw pair or guide rail pair with complete performance and a fault lead screw pair or guide rail pair, in addition, the performance degradation degree of each section of the lead screw pair or guide rail pair is intuitively displayed via normalization comparison data in a graphical mode of a slice performance degradation chromatography pattern, and the performance degradation degree can also be quantificationally obtained through the inner ring and outer ring area percentage of the slice chromatography pattern. Therefore, the distribution condition of the performance degradation degree of the lead screw pair and the guide rail pair in each section can be realized, the fault generating positions of the lead screw pair and the guide ail pair are positioned, the fault positions can be avoided in the use process for ensuring the processing quality of workpeices, meanwhile, the service life of the lead screw pair and the service life of the guide rail pair are prolonged, and the corresponding reinforced design measures are adopted by aiming at easy-fault-generation positions during the design so that the performance is improved and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of mechanical system state monitoring and fault diagnosis, in particular to a graphic analysis method for performance degradation of a lead screw pair or a guide rail pair. Background technique [0002] With the improvement of my country's manufacturing industry, CNC machine tools have become important equipment in the field of mechanical processing, and have been widely used in the processing of various precision and complex parts. The screw pair and the guide rail pair are the key precision components of the transmission and guidance of the CNC machine tool, and their performance directly affects the accuracy of the processed workpiece. However, the screw pair and the guide rail pair operate under complex or even harsh working conditions, and the wear and tear leads to the continuous degradation of their performance. Therefore, it is necessary to monitor and evaluate the performance degradation of the screw pair and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/12
Inventor 张筱辰高宏力黄海凤许明恒郭亮文娟陈晨
Owner SOUTHWEST JIAOTONG UNIV