CN108942406B - Machine tool spindle motor power real-time monitoring system and method - Google Patents
Machine tool spindle motor power real-time monitoring system and method Download PDFInfo
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- CN108942406B CN108942406B CN201810766086.7A CN201810766086A CN108942406B CN 108942406 B CN108942406 B CN 108942406B CN 201810766086 A CN201810766086 A CN 201810766086A CN 108942406 B CN108942406 B CN 108942406B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
Abstract
The application discloses a system and a method for monitoring the power of a machine tool spindle motor in real time, wherein the system comprises: a plurality of current sensors arranged on the power supply lead of the machine tool spindle motor for measuring the current of the power supply lead of the machine tool spindle motor; a plurality of voltage sensors arranged on the power supply lead of the machine tool spindle motor for measuring the current voltage of the power supply lead of the machine tool spindle motor; the monitoring device is respectively connected with the current sensors and the voltage sensors and is used for storing the current and the current voltage and obtaining the current power of the spindle motor of the machine tool according to the current and the current voltage. The system obtains the real-time power of the machine tool spindle motor by measuring the current and the voltage of the machine tool spindle motor in real time, and realizes the acquisition of the power signal of the machine tool spindle motor in the machining process of the machine tool with high frequency and high precision, thereby effectively improving the monitoring applicability and real-time performance, and being simple and easy to realize.
Description
Technical Field
The application relates to the technical field of machining, in particular to a system and a method for monitoring power of a machine tool spindle motor in real time.
Background
The monitoring of various state signals of the machine tool in the machining process is an important means for guaranteeing the stable and reliable operation of the machine tool. The machine tool spindle motor power signal contains rich machining state information such as contact time of the tool with the workpiece, machining process power fluctuation, tool wear, tool breakage and the like. Meanwhile, the power signal of the spindle motor in the machining process of the machine tool is easy to measure, and no interference is generated in the machining process, so that the power monitoring of the spindle motor is widely applied in the machining process.
However, the related art often only collects low frequency process spindle motor power signals, which contain limited process state information. In order for the acquired power signal to contain more, more accurate process state information, the acquired power signal is required to be up to 250KHz and above. Therefore, development of a real-time monitoring system for machine tool spindle motor power is needed to realize high-precision and high-frequency (up to 250KHz and above) machine tool machining process spindle motor power signal acquisition.
Disclosure of Invention
The present application has been made based on the knowledge and findings of the inventors of the following problems:
machine tool spindle motor power monitoring devices used in machining processes generally collect only low frequency machining process spindle motor power signals. Whereas a high frequency, high accuracy machine tool machining process spindle motor power signal means that it contains more, more accurate machining state information. In order for the acquired power signal to contain more, more accurate process state information, the acquired power signal is required to be up to 250KHz and above. The high-frequency machine tool spindle motor power signal has close correlation with the surface shape precision of the processed part, and the high-frequency machine tool spindle motor power signal is analyzed, so that the processing quality and the surface defect diagnosis of the part are improved. In summary, a system for monitoring the power signal of the spindle motor of a machine tool, which is used for collecting high frequency and high precision in real time, is developed, and has important significance in the field of machining.
The present application aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the application aims to provide a real-time monitoring system for the power of a machine tool spindle motor, which effectively improves the applicability and the real-time performance of monitoring, and is simple and easy to realize.
Another object of the present application is to provide a method for monitoring the power of a spindle motor of a machine tool in real time.
In order to achieve the above object, an embodiment of an aspect of the present application provides a system for monitoring power of a spindle motor of a machine tool in real time, including: a plurality of current sensors arranged on a power supply lead of a machine tool spindle motor for measuring the current of the power supply lead of the machine tool spindle motor; a plurality of voltage sensors arranged on the power supply lead of the machine tool spindle motor for measuring the current voltage of the power supply lead of the machine tool spindle motor; the monitoring device is respectively connected with the current sensors and the voltage sensors and is used for storing the current and the current voltage and obtaining the current power of the machine tool spindle motor according to the current and the current voltage.
According to the real-time monitoring system for the power of the machine tool spindle motor, the real-time power of the machine tool spindle motor is obtained by measuring the current and the voltage of the machine tool spindle motor in real time, and the acquisition of the power signal of the machine tool spindle motor in the machining process of a high-frequency and high-precision machine tool is realized, so that the monitoring applicability and the real-time performance are effectively improved, and the system is simple and easy to realize.
In addition, the machine tool spindle motor power real-time monitoring system according to the above embodiment of the present application may further have the following additional technical features:
further, in one embodiment of the present application, the plurality of current sensors includes first to third current sensors, and the first to third current sensors are disposed in one-to-one correspondence with the power supply wires of the spindle motor of the machine tool, the plurality of voltage sensors includes first to third voltage sensors, and the plurality of voltage sensors are respectively used for measuring voltages between every two wires for supplying power to the spindle motor of the machine tool.
Further, in one embodiment of the present application, the method further includes: the data acquisition device is respectively connected with the plurality of current sensors, the plurality of voltage sensors and the monitoring device, so as to receive the current currents and the current voltages sent by the plurality of current sensors and the plurality of voltage sensors and send the current currents and the current voltages to the monitoring device.
Further, in one embodiment of the present application, the method further includes: and the power supply module is respectively connected with the plurality of current sensors and the plurality of voltage sensors so as to supply power for the plurality of current sensors and the plurality of voltage sensors.
Further, in one embodiment of the present application, the sampling frequency of the data acquisition device may be up to 250KHz and above.
Further, in an embodiment of the application, the monitoring device is further configured to display the current, the current voltage and the current power of the spindle motor of the machine tool.
In order to achieve the above objective, another embodiment of the present application provides a method for monitoring power of a spindle motor of a machine tool in real time, comprising the following steps: measuring the current of a power supply wire of a machine tool spindle motor; measuring the current voltage between every two wires for supplying power to the machine tool spindle motor; and storing the current and the current voltage, and acquiring the current power of the machine tool spindle motor according to the current and the current voltage.
According to the real-time monitoring method for the power of the machine tool spindle motor, the real-time power of the machine tool spindle motor is obtained by measuring the current and the voltage of the machine tool spindle motor in real time, and the acquisition of the power signal of the machine tool spindle motor in the machining process of a high-frequency and high-precision machine tool is realized, so that the monitoring applicability and the real-time performance are effectively improved, and the method is simple and easy to realize.
In addition, the method for monitoring the power of the spindle motor of the machine tool according to the embodiment of the application can also have the following additional technical characteristics:
further, in one embodiment of the present application, the method further includes: and collecting the current and the current voltage, wherein the sampling frequency can reach 250KHz and above.
Further, in one embodiment of the present application, the present current, the present voltage, and the present power of the machine tool spindle motor are displayed.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a real-time monitoring system for machine tool spindle motor power according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a real-time monitoring system for machine tool spindle motor power according to one embodiment of the present application;
fig. 3 is a flowchart of a method for monitoring power of a spindle motor of a machine tool in real time according to an embodiment of the present application.
Reference numerals illustrate:
the power real-time monitoring system of the machine tool spindle motor comprises a machine tool spindle motor power real-time monitoring system 10, a plurality of current sensors 100, a plurality of voltage sensors 200, a monitoring device 300, a driver 1, a machine tool spindle motor 2, a current measuring module 3, current sensors 31-33, a power supply module 4, a voltage measuring module 5, voltage sensors 51-53, a data acquisition module 6 and a data processing module 7.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
The system and the method for monitoring the power of the spindle motor of the machine tool according to the embodiment of the application are described below with reference to the accompanying drawings, and the system for monitoring the power of the spindle motor of the machine tool according to the embodiment of the application is described first with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a real-time monitoring system for power of a spindle motor of a machine tool according to an embodiment of the present application.
As shown in fig. 1, the machine tool spindle motor power real-time monitoring system 10 includes: a plurality of current sensors 100, a plurality of voltage sensors 200, and a monitoring device 300.
Wherein, a plurality of current sensors 100 are disposed on the machine tool spindle motor power supply wire to measure the present current of the machine tool spindle motor power supply wire. A plurality of voltage sensors 200 are provided on the machine tool spindle motor power supply conductor to measure the current voltage of the machine tool spindle motor power supply conductor. The monitoring device 300 is respectively connected with the plurality of current sensors 100 and the plurality of voltage sensors 200, and the monitoring device 300 is used for storing the current and the current voltage and obtaining the current power of the spindle motor of the machine tool according to the current and the current voltage. The real-time monitoring system 10 for the power of the machine tool spindle motor obtains the real-time power of the machine tool spindle motor by measuring the current and the voltage of the machine tool spindle motor in real time, and realizes the acquisition of the power signal of the machine tool spindle motor in the machining process of a high-frequency and high-precision machine tool, thereby effectively improving the applicability and the real-time performance of monitoring, and being simple and easy to realize.
It will be appreciated that the plurality of current sensors 100 may be integrated in a current measurement module, and be used for measuring the current in each wire for supplying power to the spindle motor of the machine tool, or may be used for directly measuring the current of the wire for supplying power to the spindle motor of the machine tool through the plurality of current sensors 100, which may be set by those skilled in the art according to the actual use requirements, and is not limited herein. Likewise, the voltage sensors 200 may be integrated in a voltage measurement module, and are respectively used for measuring the voltage between every two wires for supplying power to the spindle motor of the machine tool, or may directly measure the current voltage of the power supply wire of the spindle motor of the machine tool through the voltage sensors 200, which can be set by those skilled in the art according to the actual use requirements, and the present application is not limited herein. The monitoring device 300 may be a data processing module, which is connected to the plurality of current sensors 100 and the plurality of voltage sensors 200, respectively, although the data processing module may be connected to the current measuring module and the voltage measuring module.
Further, in one embodiment of the present application, the plurality of current sensors 100 may include first to third current sensors, and the first to third current sensors are disposed in one-to-one correspondence with power supply wires of the spindle motor of the machine tool, and the plurality of voltage sensors 200 may include first to third voltage sensors, and the plurality of voltage sensors 200 are respectively used to measure voltages between every two wires for supplying power to the spindle motor of the machine tool.
It should be noted that, when measuring the current in the line, the plurality of current sensors 100 need to pass a wire through the current sensors. The plurality of voltage sensors 200 are directly connected to wires for supplying power to the spindle motor when measuring voltages. The three voltage sensors are respectively used for measuring the voltage between every two wires for supplying power to the spindle motor of the machine tool.
Further, in one embodiment of the present application, the machine tool spindle motor power real-time monitoring system 10 of the embodiment of the present application further includes: and a data acquisition device. The data acquisition device is respectively connected with the plurality of current sensors 100, the plurality of voltage sensors 200 and the monitoring device 300 to receive the current and the current voltage sent by the plurality of current sensors 100 and the plurality of voltage sensors 200 and send the current and the current voltage to the monitoring device 300.
Further, in one embodiment of the application, the monitoring device is also used to display the present current, the present voltage and the present power of the spindle motor of the machine tool.
For example, the data acquisition device may be a data acquisition module, may be connected to output ends of the three current sensors and the three voltage sensors, and be configured to acquire signals output by the three current sensors and the three voltage sensors, the monitoring device 300 may be a data processing module, and the data processing module is connected to an output end of the data acquisition module, and is configured to receive the three current signals and the three voltage signals acquired by the data acquisition module, and calculate the power of the spindle motor of the machine tool in real time by using the three received current signals and the three voltage signals, and the data processing module may store and display the three received current signals, the three voltage signals, and the calculated real-time power signal of the spindle motor of the machine tool in real time.
Further, in one embodiment of the present application, the sampling frequency of the data acquisition device may be up to 250KHz and above.
That is, when the power signal of the spindle motor of the machine tool with high frequency and high precision is collected, the sampling frequency of the data collection device can reach 250KHz and above.
Further, in one embodiment of the present application, the method further includes: and a power supply module. The power supply module is respectively connected with the plurality of current sensors 100 and the plurality of voltage sensors 200 to supply power to the plurality of current sensors and the plurality of voltage sensors.
For example, the power supply module is connected with the three current sensors and the three voltage sensors to supply power to the three current sensors and the three voltage sensors.
Further, in one embodiment of the present application, the method further includes: a driver. Wherein, the driver links to each other with the lathe spindle motor to for lathe spindle motor power supply.
In one embodiment of the present application, as shown in fig. 2, a plurality of current sensors 100 are integrated in a current measurement module, a plurality of voltage sensors are integrated in a voltage measurement module, a monitoring device 300 is exemplified by a data processing module, a data collecting device is exemplified by a data collecting module, and a machine tool spindle motor power real-time monitoring system 10 according to an embodiment of the present application includes: the device comprises a current measurement module 3, a power supply module 4, a voltage measurement module 5, a data acquisition module 6 and a data processing module 7.
The spindle motor 2 is connected to the driver 1 and is supplied with power from the driver 1.
The current measurement module 3 comprises a first current sensor 31, a second current sensor 32 and a third current sensor 33. The first current sensor 31, the second current sensor 32 and the third current sensor 33 are used for measuring the machine tool spindle motor 2 current. The first, second and third current sensors 31, 32 and 33 are installed in such a manner that when measuring the current of the spindle motor 2 of the machine tool, as shown in the drawings, wires pass through the first, second and third current sensors 31, 32 and 33.
The voltage measurement module 5 includes a third voltage sensor 53, a second voltage sensor 52, and a first voltage sensor 51. The third voltage sensor 53, the second voltage sensor 52 and the first voltage sensor 51 are mounted in such a manner that they are directly connected to the wires for supplying power to the spindle motor 2 when measuring the voltage of the spindle motor 2 of the machine tool, as shown in the drawings. The third voltage sensor 53, the second voltage sensor 52, and the first voltage sensor 51 measure voltages between every two wires that supply power to the spindle motor 2, respectively.
The power supply module 4 is connected to the voltage sensor 53, the voltage sensor 52, the voltage sensor 51, the current sensor 31, the current sensor 32 and the current sensor 33, and supplies power to the voltage sensor 53, the voltage sensor 52, the voltage sensor 51, the current sensor 31, the current sensor 32 and the current sensor 33.
The data acquisition module 6 is connected to the output ends of the third voltage sensor 53, the second voltage sensor 52, the first voltage sensor 51, the first current sensor 31, the second current sensor 32 and the third current sensor 33, and is used for acquiring voltage signals output by the third voltage sensor 53, the second voltage sensor 52 and the first voltage sensor 51 and current signals output by the first current sensor 31, the second current sensor 32 and the third current sensor 33. The sampling frequency of the data acquisition module 6 can reach 250KHz or more.
The data processing module 7 is connected with the output end of the data acquisition module 6, and is used for receiving the three current signals and the three voltage signals acquired by the data acquisition module 6, calculating the power of the machine tool spindle motor 2 in real time by utilizing the three received current signals and the three voltage signals, and the data processing module 7 can store and display the three received current signals, the three voltage signals and the calculated real-time power signal of the machine tool spindle motor 2 in real time.
According to the real-time monitoring system for the power of the machine tool spindle motor, which is provided by the embodiment of the application, the real-time power of the machine tool spindle motor is obtained by measuring the current and the voltage of the machine tool spindle motor in real time, and the acquisition of the power signal of the machine tool spindle motor in the machining process of a high-frequency and high-precision machine tool is realized, so that the monitoring applicability and the real-time performance are effectively improved, and the system is simple and easy to realize.
The method for monitoring the power of the spindle motor of the machine tool in real time according to the embodiment of the application is described with reference to the accompanying drawings.
Fig. 3 is a flow chart of a method for real-time monitoring of machine tool spindle motor power in accordance with one embodiment of the present application.
As shown in fig. 3, the method for monitoring the power of the spindle motor of the machine tool in real time comprises the following steps:
in step S301, the present current of the machine tool spindle motor power supply wire is measured.
In step S302, the current voltage between every two wires that power the machine tool spindle motor is measured.
In step S303, the present current and the present voltage are stored, and the present power of the spindle motor of the machine tool is obtained from the present current and the present voltage.
Further, in an embodiment of the present application, the method of the embodiment of the present application further includes: the current and the current voltage are collected, wherein the sampling frequency can reach 250KHz and above.
Further, in one embodiment of the present application, the present current, the present voltage, and the present power of the machine tool spindle motor are displayed.
It should be noted that the foregoing explanation of the embodiment of the real-time monitoring system for machine tool spindle motor power is also applicable to the real-time monitoring method for machine tool spindle motor power of this embodiment, and will not be repeated here.
According to the real-time monitoring method for the power of the machine tool spindle motor, which is provided by the embodiment of the application, the real-time power of the machine tool spindle motor is obtained by measuring the current and the voltage of the machine tool spindle motor in real time, and the acquisition of the power signal of the machine tool spindle motor in the machining process of a high-frequency and high-precision machine tool is realized, so that the monitoring applicability and the real-time performance are effectively improved, and the method is simple and easy to realize.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (4)
1. A machine tool spindle motor power real-time monitoring system, comprising:
a plurality of current sensors disposed on a machine tool spindle motor power supply conductor for measuring a present current of the machine tool spindle motor power supply conductor, wherein the machine tool spindle motor is powered by a driver connected thereto;
a plurality of voltage sensors arranged on the power supply lead of the machine tool spindle motor for measuring the current voltage of the power supply lead of the machine tool spindle motor; and
the data acquisition device is respectively connected with the plurality of current sensors, the plurality of voltage sensors and the monitoring device, so as to receive the current and the current voltage sent by the plurality of current sensors and the plurality of voltage sensors and send the current and the current voltage to the monitoring device;
a monitoring device for storing the current and the current voltage, and obtaining the current power of the machine tool spindle motor according to the current and the current voltage, wherein,
the plurality of current sensors comprise first to third current sensors, the first to third current sensors are arranged in one-to-one correspondence with power supply wires of the machine tool spindle motor, the power supply wires penetrate through the plurality of current sensors, the plurality of voltage sensors comprise first to third voltage sensors, the plurality of voltage sensors are respectively used for measuring voltages between every two wires for supplying power to the machine tool spindle motor, and the power supply wires are directly connected with the voltage sensors;
the system further comprises:
and the power supply module is respectively connected with the plurality of current sensors and the plurality of voltage sensors so as to supply power for the plurality of current sensors and the plurality of voltage sensors.
2. The machine tool spindle motor power real time monitoring system of claim 1, wherein the monitoring device is further configured to display the present current, the present voltage, and the present power of the machine tool spindle motor.
3. A method for monitoring the power of a spindle motor of a machine tool in real time, which is characterized in that the method uses the system for monitoring the power of the spindle motor of the machine tool in real time as claimed in claim 1 to monitor the power of the spindle motor of the machine tool in real time, and comprises the following steps:
measuring a present current of a machine tool spindle motor power supply wire through a plurality of current sensors, wherein the machine tool spindle motor is powered by a driver connected with the machine tool spindle motor;
measuring the current voltage between every two wires for supplying power to the machine tool spindle motor through a plurality of voltage sensors; and
collecting the current currents and the current voltages measured by the plurality of current sensors and the plurality of voltage sensors through a data collecting device;
storing the current and the current voltage by a monitoring device, and acquiring the current power of the machine tool spindle motor according to the current and the current voltage, wherein,
the plurality of current sensors and the plurality of voltage sensors are arranged on a power supply lead of the machine tool spindle motor, the plurality of current sensors comprise first to third current sensors, the first to third current sensors are arranged in one-to-one correspondence with the power supply lead of the machine tool spindle motor, the power supply lead penetrates through the current sensors, the plurality of voltage sensors comprise first to third voltage sensors, and the power supply lead is directly connected with the voltage sensors;
the data acquisition device is respectively connected with the plurality of current sensors, the plurality of voltage sensors and the monitoring device;
the method further comprises the steps of:
and the power supply module is used for supplying power to the plurality of current sensors and the plurality of voltage sensors, wherein the power supply module is respectively connected with the plurality of current sensors and the plurality of voltage sensors.
4. A machine tool spindle motor power real time monitoring method according to claim 3, wherein the present current, the present voltage and the present power of the machine tool spindle motor are displayed.
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