CN111596615A - Online monitoring and control system of numerical control machine tool - Google Patents
Online monitoring and control system of numerical control machine tool Download PDFInfo
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- CN111596615A CN111596615A CN202010519504.XA CN202010519504A CN111596615A CN 111596615 A CN111596615 A CN 111596615A CN 202010519504 A CN202010519504 A CN 202010519504A CN 111596615 A CN111596615 A CN 111596615A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
Abstract
The invention relates to the technical field of numerical control machine tools. In order to improve the processing quality, precision, efficiency and safety of a numerical control machine tool, the invention provides an online monitoring and control system of the numerical control machine tool, wherein a sensing device collects temperature, noise and vibration information of a test point of the numerical control machine tool, and the temperature, noise and vibration information is converted into a digital signal in real time through a data collection device and transmitted to a data processing analysis storage device; the data processing, analyzing and storing device processes the received digital signals to obtain the temperature T, the noise R and the vibration quantity F of the test point and a preset temperature threshold value T0Noise threshold R0And a vibration amount threshold value F0And comparing, sending an alarm according to the comparison result, and adjusting the operation parameters of the numerical control machine tool to be tested so as to reduce vibration or predict whether the numerical control machine tool to be tested has potential faults. The online monitoring and control system of the numerical control machine tool monitors the whole machine in real time and autonomously controls the running state of the numerical control machine tool when a fault exists, so that the processing quality, the precision, the efficiency and the running safety are improved.
Description
Technical Field
The invention relates to the technical field of numerical control machines, in particular to a system for carrying out online monitoring and control on a numerical control machine.
Background
With the development of economy and the improvement of technological level, numerical control machines are increasingly applied to the processing of key parts in the fields of aerospace, ships, transportation and the like. In the processing process, the processing quality, the processing precision and the processing time of the processed product are all influenced by whether the numerical control machine can safely operate.
At present, the numerical control machine tool is developing towards the directions of high speed, high precision, multi-axis linkage combined machining and the like, so that the probability of the numerical control machine tool breaking down is gradually increased, and the reason of the breaking down is gradually complicated. In addition, in the machining process, too large vibration of the numerical control machine tool not only can cause the reduction of the machining quality of machined parts, but also can damage the cutter of the numerical control machine tool and even influence the operation safety of the numerical control machine tool. Therefore, in order to ensure that the numerical control machine can safely and stably operate, the vibration, noise and temperature of the numerical control machine need to be monitored in real time in the machining process so as to realize fault early warning.
In order to implement real-time early warning of faults of the numerical control machine tool, a person skilled in the art usually monitors the state of the numerical control machine tool, and monitoring parts are mainly concentrated on a main shaft part of the numerical control machine tool.
Disclosure of Invention
In order to improve the processing quality, the processing precision, the processing efficiency and the safety of a numerical control machine tool, the invention provides an online monitoring and control system of the numerical control machine tool, in the online monitoring and control system of the numerical control machine tool, a sensing device is arranged on a test point and is electrically connected with a data acquisition device, and is used for acquiring the temperature, the noise and the vibration of the test point, converting the temperature, the noise and the vibration into a temperature analog signal, a noise analog signal and a vibration analog signal and transmitting the temperature analog signal, the noise analog signal and the vibration analog signal to the data acquisition device in real time, and the test point is distributed on a main shaft, a motor;
the data acquisition device is electrically connected with the data processing, analyzing and storing device, and converts the temperature analog signal, the noise analog signal and the vibration analog signal into a temperature digital signal, a noise digital signal and a vibration digital signal and transmits the temperature digital signal, the noise digital signal and the vibration digital signal to the data processing, analyzing and storing device;
the data processing, analyzing and storing device processes and analyzes the temperature digital signal, the noise digital signal and the vibration digital signal to obtain the temperature T, the noise R and the vibration quantity F of the test point and the preset temperature threshold value T0Noise threshold R0And a vibration amount threshold value F0And comparing, and sending an alarm according to a comparison result, and adjusting the operation parameters of the numerical control machine tool to be tested so as to reduce vibration or predict whether the numerical control machine tool to be tested has potential faults.
When the on-line monitoring and control system of the numerical control machine tool monitors the temperature, noise and vibration quantity of the numerical control machine tool to be detected in real time by using the sensing device, the on-line monitoring and control system not only monitors the spindle part of the numerical control machine tool in real time, but also monitors the motor, the clamping platform and the bed body of the numerical control machine tool in real time, can accurately obtain the complete machine state of the numerical control machine tool, and is convenient for a worker to more deeply and carefully know the state of the numerical control machine tool; monitoring temperature, noise and vibration information of each test point on the numerical control machine tool by using a sensing device, converting the temperature, noise and vibration information into analog signals and transmitting the analog signals to a data acquisition device, and converting the analog signals acquired by the sensing device into digital signals by the data acquisition device and transmitting the digital signals to a data processing analysis storage device; processing and analyzing the monitored temperature digital signal, noise digital signal and vibration digital signal by using a data processing, analyzing and storing device to obtain the temperature T, the noise R and the vibration quantity F of the test point, and then processing and analyzing the temperature T, the noise R and the vibration quantity F and a preset temperature threshold value T0Noise threshold R0And a vibration amount threshold value F0Performing comparison to determine the operation state of the numerically controlled machine tool according to the comparison result and aiming at the condition of notAnd sending an alarm under the same operation state, adjusting the operation parameters of the numerical control machine tool to reduce vibration or predicting whether the numerical control machine tool has potential faults. Therefore, when the numerical control machine tool on-line monitoring and control system is used for monitoring and controlling the numerical control machine tool, the sensing device can monitor the whole machine of the numerical control machine tool in real time, and the monitoring is comprehensive and delicate, so that a worker can know the running state of the numerical control machine tool more deeply and carefully; the data processing, analyzing and storing device processes and analyzes the monitoring data to obtain the running state of the numerical control machine tool, and sends out an alarm according to the running state of the numerical control machine tool, adjusts the running parameters of the numerical control machine tool to reduce vibration or predicts whether the numerical control machine tool has potential faults or not. Therefore, the online monitoring and control system of the numerical control machine tool can comprehensively and finely monitor the running state of the numerical control machine tool, and is convenient for workers to deeply and finely know the running state of the numerical control machine tool in real time; the operation parameters of the numerical control machine tool can be adjusted when the numerical control machine tool has faults so as to reduce vibration, quickly reduce the influence of overlarge vibration of the numerical control machine tool on a machined workpiece, a cutter and the numerical control machine tool, reduce the rate of machined defective goods and improve the machining quality and the machining precision of the numerical control machine tool; and potential faults possibly existing in the numerical control machine tool can be predicted when the numerical control machine tool operates normally, so that early warning of the potential faults of the numerical control machine tool is realized, workers are reminded to pay attention to overhaul, the numerical control machine tool is prevented from being stopped and overhauled due to faults, even safety accidents occur, and the machining efficiency and the operation safety of the numerical control machine tool are improved.
Preferably, when T > T0Or R > R0When the data processing, analyzing and storing device gives out an alarm; when F > F0When the numerical control machine tool to be tested is in operation, the data processing, analyzing and storing device sends out an alarm, processes and analyzes the vibration digital signal to determine the fault type of the numerical control machine tool to be tested and sends a control signal to the numerical control machine tool to be tested to adjust the operation parameters of the numerical control machine tool to be tested; when T is less than or equal to T0、R≤R0And F is less than or equal to F0Then, the data processing, analyzing and storing device performs time domain analysis, frequency domain analysis and correlation analysis on the vibration digital signal and extracts the vibration digital signalVibrating a time domain characteristic value and a frequency domain characteristic value in a digital signal, processing and analyzing the time domain characteristic value and the frequency domain characteristic value by the data processing, analyzing and storing device, predicting whether the numerical control machine tool to be tested has a potential fault according to a processing and analyzing result, and sending an alarm by the data processing, analyzing and storing device when the numerical control machine tool to be tested has the potential fault; and when the numerical control machine tool to be tested has no potential fault, the data processing, analyzing and storing device does not give an alarm. Therefore, the data processing, analyzing and storing device in the on-line monitoring and control system of the numerical control machine tool can accurately judge the fault type of the numerical control machine tool according to the information contained in the vibration digital signal, so that the data processing, analyzing and storing device can conveniently send a control signal to the numerical control machine tool according to the fault type of the numerical control machine tool to adjust the operation parameters of the numerical control machine tool and reduce the vibration of the numerical control machine tool; the time domain characteristic value and the frequency domain characteristic value in the vibration digital signal can be processed and analyzed, whether the numerical control machine tool has the potential fault or not can be predicted according to the processing and analyzing result, the prediction accuracy of the potential fault can be improved, a worker can conveniently overhaul the numerical control machine tool according to the prediction result, and the numerical control machine tool is prevented from influencing the processing quality, the processing precision and the processing efficiency due to the fault, even the processing safety is avoided. Further, an artificial intelligence module is arranged in the data processing, analyzing and storing device, and when F is larger than F0Then, the vibration digital signal is transmitted to the artificial intelligence module in real time, and the artificial intelligence module processes and analyzes the vibration digital signal to determine the fault type of the numerical control machine tool to be tested; when T is less than or equal to T0、R≤R0And F is less than or equal to F0And then, the artificial intelligence module processes and analyzes the time domain characteristic value and the frequency domain characteristic value, and predicts whether the numerical control machine tool to be tested has a potential fault according to a processing and analyzing result. Therefore, the numerical control machine tool on-line monitoring and control system predicts the potential faults of the numerical control machine tool by using the artificial intelligence module through the artificial intelligence technology, and can further improve the prediction accuracy. Further preferably, the data processing, analyzing and storing device is provided with a signal transmitting module electrically connected with the artificial intelligence module, and the artificial intelligence moduleThe energy module is used for sending a control signal to the numerical control machine tool to be tested to adjust the operation parameters of the numerical control machine tool to be tested through the signal transmitting module after determining the fault type of the numerical control machine tool to be tested, wherein the control signal comprises a feed quantity reducing signal, a motor rotating speed reducing signal and a stop signal. Therefore, after the fault type of the numerical control machine tool is determined, the artificial intelligence module can send a control signal to the numerical control machine tool through the signal transmitting module according to the fault type of the numerical control machine tool, for example, a feeding amount signal, a motor rotating speed signal and a stop signal are reduced, operation parameters of the numerical control machine tool are adjusted, vibration of the numerical control machine tool is reduced, namely, the fault is eliminated or the ground loss caused by the fault of the numerical control machine tool is reduced by reducing the feeding amount, reducing the rotating speed of the motor and even stopping the machine tool.
Preferably, the data processing, analyzing and storing device further comprises a parameter setting module and a data storing module, wherein the parameter setting module is used for presetting parameters, and the data storing module is used for storing monitoring data and processing and analyzing results. Thus, in use, the parameter setting module can be used by a worker to preset parameters in the data processing, analyzing and storing device, such as the temperature threshold T of each test point0Noise threshold R0And a vibration amount threshold value F0The data processing, analyzing and storing device compares the temperature T, the noise R and the vibration quantity F of each test point of the numerical control machine tool after acquiring the temperature T, the noise R and the vibration quantity F of each test point so as to determine whether the numerical control machine tool has faults or not; monitoring data and processing analysis results can be stored by utilizing the data storage module, so that workers can conveniently check the monitoring data and the processing analysis results when needed. Furthermore, the data processing, analyzing and storing device further comprises a display module for displaying alarm information, monitoring data and processing and analyzing results. Therefore, the staff can read the alarm information, the monitoring data and the processing and analyzing result through the display module, and the staff can conveniently inquire the alarm information, the monitoring data and the processing and analyzing result when needed. Further preferably, the data processing, analyzing and storing device can be a PC or a workstation. The data processing, analyzing and storing device is simple to select and convenient to use.
Preferably, the sensing device comprises a plurality of temperature sensors, noise sensors and vibration sensors electrically connected to the data acquisition device. Like this, when using, can utilize sensing device simultaneously to gather the temperature, noise and the vibration condition of a plurality of different test points on the digit control machine tool as required, conveniently monitor the digit control machine tool comprehensively carefully, and then conveniently learn the overall state of digit control machine tool. Furthermore, the vibration sensor can be an acceleration sensor, a speed sensor or a displacement sensor, and is convenient to select and use.
Preferably, the data acquisition device can select a data acquisition instrument, and the material selection is simple and convenient.
Drawings
FIG. 1 is a block diagram of the structure of the on-line monitoring and control system of the numerically controlled machine tool according to the present invention;
FIG. 2 is a flow chart of the on-line monitoring and controlling system for the numerically controlled machine tool according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.
In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.
The on-line monitoring and control system of the numerical control machine tool of the present invention is described in detail with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the on-line monitoring and control system for a numerical control machine according to the present invention includes a sensing device 100, a data collecting device 200, and a data processing, analyzing and storing device 300. The sensing device 100 is arranged on the test points and electrically connected with the data acquisition device 200, and is used for acquiring the temperature, noise and vibration of the test points, converting the temperature, noise and vibration into temperature analog signals, noise analog signals and vibration analog signals, and transmitting the temperature analog signals, noise analog signals and vibration analog signals to the data acquisition device 200 in real time, and the test points are distributed on a main shaft, a motor, a clamping platform and a machine body of the numerical control machine 400, so that the sensing device 100 monitors the whole state of the numerical control machine 400 in real time. Preferably, the sensing device 100 includes a plurality of temperature sensors 101, noise sensors 102 and vibration sensors 103 electrically connected to the data collecting device 200, and the temperature sensors 101, the noise sensors 102 and the vibration sensors 103 are disposed on test points of the numerical control machine 400, so as to monitor the temperature, noise and vibration conditions of each test point on the numerical control machine 400 in real time. The temperature sensor 101 is used for acquiring temperature information of a position where a test point on the numerical control machine 400 is located, converting the temperature information into a temperature analog signal and transmitting the temperature analog signal to the data acquisition device 200 in real time. Preferably, the temperature sensor 101 is a platinum resistance temperature sensor, so that the temperature monitoring precision is high, and the use is simple and convenient. The noise sensor 102 is used for collecting noise information of a position where a test point on the numerical control machine 400 is located, converting the noise information into a noise analog signal and transmitting the noise analog signal to the data collection device 200 in real time. Preferably, the noise sensor 102 can adopt a sound level meter, the noise monitoring precision is high, and the use is simple and convenient. The vibration sensor 103 is used for collecting vibration information of a position where a test point on the numerical control machine tool 400 is located, converting the vibration information into a vibration analog signal and transmitting the vibration analog signal to the data collection device 200 in real time. Preferably, the vibration sensor 103 can be an acceleration sensor, a velocity sensor or a displacement sensor, for example, a Kistler 8763B piezoelectric acceleration sensor, and has high monitoring precision and simple and convenient selection and use.
The data acquisition device 200 is electrically connected to the data processing, analyzing and storing device 300, and after receiving the temperature analog signal, the noise analog signal and the vibration analog signal, the data acquisition device 200 converts the temperature analog signal into a temperature digital signal, converts the noise analog signal into a noise digital signal, converts the vibration analog signal into a vibration digital signal, and transmits the vibration digital signals to the data processing, analyzing and storing device 300 in real time. Preferably, the data acquisition device 200 can adopt data acquisition instruments, such as SIEMENS LMS SCADAS XS data acquisition instrument and NI data acquisition instrument, and is simple and convenient to use.
The data processing, analyzing and storing device 300 processes and analyzes the temperature digital signal, the noise digital signal and the vibration digital signal after receiving the temperature digital signal, the noise digital signal and the vibration digital signal to obtain the temperature T, the noise R and the vibration quantity F of the position of each test point on the numerical control machine 400, and processes and analyzes the temperature T, the noise R and the vibration quantity F and the preset temperature threshold T of each test point0Noise threshold R0And vibration amount threshold value F0A comparison is made. When T > T0Then it is considered to be waitingMeasure digit control machine tool 400's high temperature to send alarm signal, notice and in time overhaul digit control machine tool 400 with the suggestion staff. When R > R0In the meantime, the noise of the numerical control machine 400 is considered to be too large, and an alarm signal is sent out to prompt a worker to pay attention and timely overhaul the numerical control machine 400. When F > F0And meanwhile, processing and analyzing the vibration digital signal to determine the fault type of the numerical control machine 400, sending a control signal to the numerical control machine 400 according to the fault type of the numerical control machine 400, adjusting the operation parameters of the numerical control machine 400 and reducing the vibration of the numerical control machine 400. When T is less than or equal to T0、R≤R0And F is less than or equal to F0If the numerical control machine 400 is normal, the data processing analysis storage device 300 performs time domain analysis, frequency domain analysis and correlation analysis on the vibration digital signal, extracts a time domain characteristic value and a frequency domain characteristic value from the vibration digital signal, processes and analyzes the extracted time domain characteristic value and the extracted frequency domain characteristic value, and predicts whether the numerical control machine 400 has a potential fault according to a processing and analyzing result, and when the numerical control machine 400 has the potential fault, the data processing analysis storage device 300 sends an alarm; when there is no potential failure in the numerical control machine tool 400, the data processing analysis storage device 300 does not issue an alarm. Preferably, the data processing, analyzing and storing device 300 is provided with an artificial intelligence module 301, when the data processing, analyzing and storing device 300 compares that F > F0During the process, the vibration digital signal is transmitted to the artificial intelligence module 301 in real time, the artificial intelligence module 301 performs time domain analysis on the vibration digital signal and processes and analyzes the waveform of the vibration digital signal, the amplitude and the shape characteristics of the waveform of the vibration digital signal are extracted, the fault type of the numerical control machine 400 is identified and determined according to the table 1, the artificial intelligence module 301 sends a control signal to the numerical control machine 400 according to the fault type of the numerical control machine 400, for example, a feeding amount signal is reduced, a motor rotating speed signal and a stop signal are reduced, the operation parameter of the numerical control machine 400 is adjusted, the operation state of the numerical control machine 400 is changed, the vibration of the numerical control machine 400 is reduced, the fault of the numerical control machine 400 is eliminatedLoss due to a failure of the numerically controlled machine tool 400. Specifically, when the fault type of the numerically-controlled machine tool 400 is clear, the artificial intelligence module 301 may directly eliminate the fault or reduce the loss caused by the fault by reducing the feeding amount, reducing the motor speed or stopping the machine; when the type of the fault of the nc machine 400 is not clear, the artificial intelligence module 301 may remove the fault or reduce the loss due to the fault by trying continuously, for example, first reduce the feeding amount, and confirm whether the vibration of the nc machine 400 is reduced by monitoring and analyzing the vibration state of the nc machine 400, i.e., the vibration signal, and if the vibration is reduced, the machining may be continued; if the vibration is not reduced, the feed amount is continuously reduced or/and the rotating speed of the motor is reduced; if the vibration of the numerical control machine tool 400 cannot be reduced in the above manner, the numerical control machine tool 400 is stopped, and the worker overhauls the numerical control machine tool 400.
TABLE 1 Fault types and time domain waveform characteristic correspondence table
| Type of failure | Time domain waveform characterization |
| Unbalance of | Appear sine wave |
| Impact of | Equidistant sharp pulses |
| Friction of | Clipping occurs |
| Simple unbalance | Waveform sine type |
| Simple misalignment | Stable and smooth waveform |
| Self-excited vibration (oil film whirling, oil film vibration, etc.) | The waveform has poor disorderly repeatability and large fluctuation |
The digital processing analysis storage device 300 further comprises a signal transmitting module 302, a parameter setting module 303, a data storage module 304 and a display module 305. The signal transmitting module 302 is electrically connected to the artificial intelligence module 301, and transmits a control signal sent by the artificial intelligence module 301 to the numerical control machine 400. Preferably, the signal transmitting module 302 can be a communication module. The parameter setting module 303 is used for setting preset parameters, such as predicting the temperature threshold T of each test point on the nc machine tool in the data processing, analyzing and storing device 3000Noise threshold R0And a vibration amount threshold value F0So that the data processing analysis storage device 300 compares and determines whether the numerical control machine 400 has a fault after knowing the temperature T, the noise R and the vibration quantity F of the numerical control machine 400. The data storage module 304 is used for storing monitoring data and processing analysis results so as to be convenient for workers to check when needed, such as later-period maintenance. The display module 305 is used for displaying alarm information, monitoring data and processing analysis results, so that the staff can conveniently inquire the alarm information, the monitoring data and the processing analysis results when needed. Preferably, the data processing, analyzing and storing device 300 can be a PC or a workstation. The data processing, analyzing and storing device 300 is simple to select and convenient to use.
In addition, when the on-line monitoring and control system of the numerical control machine tool of the present invention is implemented, all data processing and analyzing operations in the data processing, analyzing and storing device 300 can be completed by the artificial intelligence module 301.
When the on-line monitoring and control system of the numerical control machine tool monitors the temperature, noise and vibration quantity of the numerical control machine tool to be detected in real time by using the sensing device, the on-line monitoring and control system not only monitors the spindle part of the numerical control machine tool in real time, but also monitors the motor, the clamping platform and the bed body of the numerical control machine tool in real time, can accurately obtain the complete machine state of the numerical control machine tool, and is convenient for a worker to more deeply and carefully know the state of the numerical control machine tool; the artificial intelligence module is arranged in the data processing, analyzing and storing module, and can be used for predicting the potential faults of the numerical control machine tool through an artificial intelligence technology, so that the potential faults of the numerical control machine tool can be early warned in advance, workers can be reminded of observing the state of the numerical control machine tool and can be stopped and overhauled in time, the numerical control machine tool is prevented from being out of order in the working process, and further the loss can be reduced; when monitoring that digit control machine tool breaks down when for example the vibration volume is too big, usable artificial intelligence module sends control signal to digit control machine tool and independently adjusts the operating parameter of digit control machine tool, for example reduce the feed volume of digit control machine tool or/and reduce the vibration that motor speed reduced the digit control machine tool, thereby can reduce the influence of too big vibration to the work piece, cutter and digit control machine tool fast, reduce the defective percentage of processing product, improve the processingquality and the machining precision of digit control machine tool, avoid digit control machine tool because of breaking down and overhauing, the incident appears even, improve the machining efficiency and the operation security of digit control machine tool.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
Claims (10)
1. The numerical control machine tool on-line monitoring and control system is characterized in that in the numerical control machine tool on-line monitoring and control system, a sensing device is arranged on a test point and is electrically connected with a data acquisition device, and is used for acquiring the temperature, noise and vibration of the test point, converting the temperature, noise and vibration into a temperature analog signal, a noise analog signal and a vibration analog signal and transmitting the temperature analog signal, the noise analog signal and the vibration analog signal to the data acquisition device in real time;
the data acquisition device is electrically connected with the data processing, analyzing and storing device, and converts the temperature analog signal, the noise analog signal and the vibration analog signal into a temperature digital signal, a noise digital signal and a vibration digital signal and transmits the temperature digital signal, the noise digital signal and the vibration digital signal to the data processing, analyzing and storing device;
the data processing, analyzing and storing device processes and analyzes the temperature digital signal, the noise digital signal and the vibration digital signal to obtain the temperature T, the noise R and the vibration quantity F of the test point and the preset temperature threshold value T0Noise threshold R0And a vibration amount threshold value F0And comparing, and sending an alarm according to a comparison result, and adjusting the operation parameters of the numerical control machine tool to be tested so as to reduce vibration or predict whether the numerical control machine tool to be tested has potential faults.
2. The on-line monitoring and control system of numerical control machine tool according to claim 1, wherein when T > T0Or R > R0When the data processing, analyzing and storing device gives out an alarm; when F > F0When the numerical control machine tool to be tested is in operation, the data processing, analyzing and storing device sends out an alarm, processes and analyzes the vibration digital signal to determine the fault type of the numerical control machine tool to be tested and sends a control signal to the numerical control machine tool to be tested to adjust the operation parameters of the numerical control machine tool to be tested; when T is less than or equal to T0、R≤R0And F is less than or equal to F0The data processing, analyzing and storing device carries out time domain analysis, frequency domain analysis and correlation analysis on the vibration digital signal and extracts a time domain characteristic value and a frequency domain characteristic value in the vibration digital signal, the data processing, analyzing and storing device carries out processing and analysis on the time domain characteristic value and the frequency domain characteristic value and predicts whether the numerical control machine tool to be tested has a potential fault according to a processing and analyzing result, and when the numerical control machine tool to be tested has a potential fault, the data processing, analyzing and storing device carries out processing and analysis on the time domain characteristic value and the frequency domainWhen the fault occurs, the data processing, analyzing and storing device gives an alarm; and when the numerical control machine tool to be tested has no potential fault, the data processing, analyzing and storing device does not give an alarm.
3. The on-line monitoring and control system of numerical control machine tool according to claim 2, wherein said data processing, analyzing and storing device is provided with an artificial intelligence module when F > F0Then, the vibration digital signal is transmitted to the artificial intelligence module in real time, and the artificial intelligence module processes and analyzes the vibration digital signal to determine the fault type of the numerical control machine tool to be tested; when T is less than or equal to T0、R≤R0And F is less than or equal to F0And then, the artificial intelligence module processes and analyzes the time domain characteristic value and the frequency domain characteristic value, and predicts whether the numerical control machine tool to be tested has a potential fault according to a processing and analyzing result.
4. The on-line monitoring and control system of a numerical control machine according to claim 3, wherein a signal transmitting module electrically connected to the artificial intelligence module is disposed in the data processing, analyzing and storing device, the artificial intelligence module sends a control signal to the numerical control machine to be tested through the signal transmitting module to adjust the operation parameters of the numerical control machine to be tested after determining the fault type of the numerical control machine to be tested, and the control signal includes a feed amount reducing signal, a motor rotation speed reducing signal and a stop signal.
5. The on-line monitoring and control system of a numerical control machine according to any one of claims 1 to 4, wherein the data processing, analyzing and storing device further comprises a parameter setting module and a data storing module, the parameter setting module is used for presetting parameters, and the data storing module is used for storing monitoring data and processing analysis results.
6. The on-line monitoring and control system of a numerical control machine according to claim 5, wherein the data processing, analyzing and storing device further comprises a display module for displaying alarm information, monitoring data and processing and analyzing results.
7. The on-line monitoring and control system of numerical control machine tool according to claim 6, wherein said data processing, analyzing and storing device is selected from PC or workstation.
8. The on-line monitoring and control system of a numerical control machine according to any one of claims 1 to 4, wherein the sensing device comprises a plurality of temperature sensors, noise sensors and vibration sensors electrically connected to the data acquisition device.
9. The on-line monitoring and control system of a numerical control machine according to claim 8, wherein the vibration sensor is selected from an acceleration sensor, a velocity sensor or a displacement sensor.
10. The on-line monitoring and control system of a numerical control machine according to any one of claims 1 to 4, wherein the data acquisition device is a data acquisition instrument.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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