Novel numerical control machine tool fault diagnosis system and method
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A fault diagnosis system, a technology of CNC machine tools, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as distortion or attenuation, complex process, time-consuming, etc., to improve operating efficiency, simple hardware structure, The effect of reducing downtime for maintenance
Inactive Publication Date: 2012-05-30
DALIAN CHUANGDA TECH TRADE MARKET
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This kind of device involves more complex circuits, and the signal undergoes multi-level conditioning and conversion, which is easy to cause distortion
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Example Embodiment
[0025] Embodiment one
[0026] As shown in Figure 1, a CNC machine tool fault diagnosis system includes:
[0027] Two acceleration sensors and one speed sensor are used to obtain vibration signals generated by CNC machine tools;
[0028] Two first signal conditioners are respectively connected to the output end of one of the acceleration sensors, and are used to condition and output the signals output by the acceleration sensors;
[0029] The second signal conditioner is connected to the output terminal of the speed sensor, and is used for conditioning and outputting the signal output by the speed sensor;
[0030] A data acquisition card, connected to the first signal conditioner and the second signal conditioner, for collecting and outputting the signal outputted by the first signal conditioner and the second signal conditioner after conditioning;
[0031] The monitoring computer is connected with the output end of the data acquisition card, and ...
Example Embodiment
[0035] Embodiment two
[0036] A method for fault diagnosis of a numerically controlled machine tool, comprising the following steps:
[0037] 1) The vibration signal acquisition step is to obtain the vibration signal generated by the CNC machine tool through two acceleration sensors and a speed sensor;
[0038] 2) a signal conditioning step, conditioning and outputting the signal output by the acceleration sensor through two first signal conditioners; conditioning and outputting the signal output by the speed sensor through a second signal conditioner;
[0039] 3) a data collection step, for collecting and outputting signals output by the first signal conditioner and the second signal conditioner after conditioning;
[0040] 4) The signal analysis step is used to calculate and analyze the vibration signal generated by the CNC machine tool, so as to realize the intelligent fault diagnosis of the machine tool.
[0041] Among them, the specific anal...
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Abstract
The invention discloses a novel numerical control machine tool fault diagnosis system and method. The novel numerical control machine tool fault diagnosis system comprises two acceleration sensors and a speed sensor which are used for acquiring vibration signals generated by a numerical control machine tool, two first signal conditioners for conditioning and outputting the signals output by the acceleration sensors, a second signal conditioner for conditioning and outputting signals output by the speed sensor, a data acquisition card for acquiring the conditioned output signals, and a monitoring computer which is connected with the output end of the data acquisition card and used for calculating and analyzing the vibration signals generated by the numerical control machine tool so as to diagnose a fault of the machine tool. The method comprises the following steps of: 1) acquiring the vibration signals; 2) conditioning the signals; 3) acquiring the data; and 4) analyzing the signals. The novel numerical control machine tool fault diagnosis system disclosed by the invention has a simple hardware structure; diagnosis and analysis functions are realized mainly by software, and the novel numerical control machine tool fault diagnosis system is convenient to upgrade and maintain; and furthermore, the unnecessary stop-to-maintain time is shortened, and the operation efficiency of the machine tool is improved.
Description
technical field [0001] The invention belongs to the technical field of numerical control machine tool fault diagnosis, in particular to a numerical control machine tool fault diagnosis system and method thereof. Background technique [0002] In the field of modern mechanical processing, CNC machining has occupied a dominant position, especially for processing parts with large quantities and high precision requirements, various CNC machine tools play an irreplaceable role. Therefore, the working stability and reliability of CNC machine tools are of great significance for improving the production efficiency of enterprises. Using the vibration signal generated when the machine tool is processing, the current running status of the CNC machine tool can be analyzed, and intelligent fault diagnosis can be carried out in advance, so as to avoid the need to stop for a long time for maintenance once a fault occurs. [0003] Through literature search, it is found that the Chinese...
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