CN111351565A - Method and measuring module for measuring ultrasonic vibration during processing of rotating object - Google Patents
Method and measuring module for measuring ultrasonic vibration during processing of rotating object Download PDFInfo
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- CN111351565A CN111351565A CN201811567433.XA CN201811567433A CN111351565A CN 111351565 A CN111351565 A CN 111351565A CN 201811567433 A CN201811567433 A CN 201811567433A CN 111351565 A CN111351565 A CN 111351565A
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- ultrasonic vibration
- rotating object
- piezoelectric materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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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
- G05B19/401—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 control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
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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
- G05B19/4065—Monitoring tool breakage, life or condition
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37022—Detector, measuring device incorporated within workpiece holder
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37269—Ultrasonic, ultrasound, sonar
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37351—Detect vibration, ultrasound
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37432—Detected by accelerometer, piezo electric
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37634—By measuring vibration
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a method for measuring ultrasonic vibration during the processing of a rotating object, which comprises the following steps: mounting at least two piezoelectric materials on a rotating object; when the rotating object is used for processing, applying electric energy to one of the at least two piezoelectric materials to enable the one of the at least two piezoelectric materials to drive the rotating object to generate ultrasonic vibration; and utilizing a sensor to receive and measure a current generated by the other of the at least two piezoelectric materials due to the ultrasonic vibration during the processing, thereby estimating the ultrasonic vibration frequency of the rotating object during the processing.
Description
Technical Field
The invention relates to a method and a module for measuring ultrasonic vibration; more particularly, to a method and module for measuring ultrasonic vibrations experienced by a rotating object during processing.
Background
With the advancement of technology, more and more products are produced by automation, which makes precision processing machines become an indispensable important role, and CNC (Computer Numerical Control) machine tools are most commonly known, which utilize precise positioning and rotation of a tool to cut and grind raw materials for forming.
In order to meet the requirements of material difference and machining quality of machined objects, some CNC machine tools can generate ultrasonic vibration during machining, so as to machine high-hardness and brittle materials more easily, and prolong the service life of the tool.
Generally, a tool machine capable of applying ultrasonic vibration has a predetermined frequency of ultrasonic vibration to be mounted, but during operation, the ultrasonic vibration actually output from the tool changes depending on the weight and density of the tool, the material of the workpiece to be machined, the machining method, the machining route, and other factors.
Different tools have different optimal ultrasonic vibration operating frequencies, and if the tool is always in the optimal ultrasonic vibration range in the machining process, the service life of the tool can be effectively prolonged and the machining quality of the machined object can be improved, so how to monitor the actual ultrasonic vibration output by the tool in the machining process and perform corresponding adjustment simultaneously becomes the target to be achieved by many manufacturers.
In practice, since sensors for measuring vibration frequency generally need to receive signals through physical wire loops, once such wire loops are installed on a tool that is rotating, they are not usable due to rotation. In addition, some manufacturers try to place a sensor on a non-rotating part of the machine tool body or the workpiece instead of a rotating tool to indirectly measure the ultrasonic vibration of the tool, but the measured ultrasonic vibration value has an error with the actual vibration frequency of the tool due to the distance between the placement position and the tool. In addition, although some manufacturers propose to perform the detection by an optical method, the method is only suitable for measuring the ultrasonic vibration frequency of the tool before the tool cuts the material, once the tool starts to perform the cutting operation, the accuracy of the optical detection is seriously affected by the waste generated during the operation of the tool or the coolant sprayed during the operation, and therefore, the ultrasonic vibration output by the actual operation of the tool cannot be obtained by the method.
Therefore, it is an objective of the present invention to provide a method and a module for measuring ultrasonic vibration to overcome the above-mentioned shortcomings.
Disclosure of Invention
It is an object of the present invention to provide a method of measuring ultrasonic vibrations during the processing of a rotating article.
To achieve the above object, the present invention provides a method for measuring ultrasonic vibration during processing of a rotating object, comprising the steps of: (a) mounting at least two piezoelectric materials on a rotating object; (b) when the rotating object is used for processing, applying electric energy to one of the at least two piezoelectric materials to drive the rotating object to generate ultrasonic vibration; and (c) utilizing a sensor to receive and measure a current generated by the other of the at least two piezoelectric materials due to the ultrasonic vibration during the processing, thereby estimating the ultrasonic vibration frequency of the rotating object during the processing.
It is still another object of the present invention to provide an ultrasonic vibration measuring module, which can measure the ultrasonic vibration of a rotating object during processing. The ultrasonic vibration measurement module comprises at least two piezoelectric materials and a sensor. At least two piezoelectric materials are disposed on the rotating object, and one of the at least two piezoelectric materials drives the rotating object during processing to generate an ultrasonic vibration. The sensor is used for receiving and measuring a current generated by the other of the at least two piezoelectric materials due to the ultrasonic vibration during the processing, so that the current can be used for estimating the ultrasonic vibration frequency of the rotating object during the processing.
In order to achieve the above object, the present invention provides a measuring method and a measuring module, wherein at least two piezoelectric materials are a first piezoelectric material and a second piezoelectric material, the first piezoelectric material is used for driving a rotating object to generate the ultrasonic vibration, and the second piezoelectric material generates a current due to the ultrasonic vibration.
To achieve the above object, in the measuring method and module of the present invention, the rotating object is a tool shank or a chuck of a Computer Numerical Control (CNC) machine tool.
In order to achieve the above object, the present invention provides a measuring method and a measuring module, wherein the sensor obtains the current in a non-contact manner by using the electromagnetic induction principle.
In order to achieve the above object, the present invention provides a measuring method and a measuring module, wherein a sensor is electrically connected to another of at least two piezoelectric materials to obtain a current.
In order to make the aforementioned objects, features and advantages more comprehensible, preferred embodiments accompanied with figures are described in detail below.
The invention has the beneficial effects that:
the measuring method or module of the present invention can directly measure the ultrasonic vibration frequency of the rotating object of the machine tool during the processing period through the arrangement of at least two piezoelectric materials. Therefore, the ultrasonic vibration of the machine tool during machining can be maintained more conveniently and accurately by a user, so that the machining quality is improved or maintained, and the service life of a rotating object (a tool shank or a chuck in the CNC machine tool) is effectively prolonged.
Drawings
FIG. 1 is a diagram of the steps of the method of the present invention for measuring ultrasonic vibrations exhibited by a rotating article during processing;
FIG. 2 is a schematic circuit diagram of an ultrasonic vibration measurement module according to the present invention installed on a rotating object; and
FIG. 3 is a schematic circuit diagram of the ultrasonic vibration measurement module of FIG. 2 during processing.
Description of the reference numerals
S1, S2, S3 steps
110 rotating object
120 piezoelectric material
122 first piezoelectric material
124 second piezoelectric material
130 sensor
142 first receiving end
144 first transmitting terminal
152 second sender
154 second receiving terminal
I current
I1 first induced current
I2 second induced current
E electric energy
V ultrasonic vibration
F has substantially the frequency of the ultrasonic vibration.
Detailed Description
As shown in FIG. 1, the present invention relates to a method for measuring ultrasonic vibrations of a rotating object 110 during processing, which may include the following steps.
At least two piezoelectric materials 120 are mounted on the rotating object 110 as shown in step S1. Next, as shown in step S2, when the rotating object 110 is used for processing, an electric energy E is applied to one of the at least two piezoelectric materials 120, so that the one of the at least two piezoelectric materials drives the rotating object 110 to generate an ultrasonic vibration V. Finally, in step S3, a sensor 130 is used to receive and measure a current I generated by the ultrasonic vibration V during the machining of another one of the at least two piezoelectric materials 120, so as to estimate the ultrasonic vibration frequency F substantially possessed by the rotating object 110 during the machining.
In practice, the measuring object of the present invention is usually a rotating object. The following description will take the CNC machine as an example, but not as a limitation. In detail, the rotating object 110 may be a tool shank or a chuck of a CNC machine tool, which may be used to clamp a milling cutter, so that the milling cutter rotates to cut and grind the object to be machined.
For the sake of understanding, the ultrasonic vibration measuring module capable of performing the measuring method will be described. As shown in the circuit diagram of fig. 2, first, to avoid the wire from being directly connected to the rotating object 110 to be twisted and broken, in a preferred embodiment, the at least two piezoelectric materials 120 include a first piezoelectric material 122 and a second piezoelectric material 124, and the first piezoelectric material 122 and the second piezoelectric material 124 are respectively disposed on a lower side and an upper side of the rotating object 110.
As shown in fig. 2, the ultrasonic vibration measurement module of the present invention further includes a first receiving end 142, a first transmitting end 144, a second transmitting end 152 and a second receiving end 154. The first receiving end 142 and the second sending end 152 are also disposed on a lower side and an upper side of the rotating object 110, and are electrically connected to the first piezoelectric material 122 and the second piezoelectric material 124, respectively; the first sending end 144 and the second receiving end 154 are disposed on the periphery of the rotating object 110 in a non-contact manner, such that the first sending end 144 is disposed corresponding to the first receiving end 142, and the second receiving end 154 is disposed corresponding to the second sending end 152.
As shown in fig. 3, when the circuit of the first transmitting terminal 144 located at the lower left is turned on, the first transmitting terminal 144 with (alternating current) electric energy E can generate a first induced current I1 at the first receiving terminal 142 located on the rotating object 110 in a non-contact manner through the electromagnetic induction principle, and then the first induced current I1 is deformed by the first piezoelectric material 122, so as to drive the rotating object 110 to generate an ultrasonic vibration V.
When the rotating object 110 generates the ultrasonic vibration V, the second piezoelectric material 124 on the upper side of the rotating object 110 deforms accordingly and outputs a current I to the second transmitting end 152. At this time, the second receiving terminal 154 corresponding to the second transmitting terminal 152 can generate a second induced current I2 in the second receiving terminal 154 by the electromagnetic induction principle, and the sensor 130 electrically connected to the second receiving terminal 154 can read and record the second induced current I2.
In this way, the second induced current I2 is used to obtain the value of the current I output by the second piezoelectric material 124 due to deformation through proper conversion, so as to derive the ultrasonic vibration frequency F substantially possessed by the rotating object 110 during the processing. Thus, the subsequent user can use the substantial ultrasonic vibration frequency F as a basis to adjust the initially inputted electric energy E to maintain the ultrasonic vibration of the rotating object 110 at the optimum working frequency, thereby prolonging the service life of the rotating object 110 and improving the processing quality and efficiency.
Although the sensor 130 of the above embodiment measures the current I in a non-contact manner by using the electromagnetic induction principle, in other embodiments, the sensor 130 may be electrically connected to the second piezoelectric material 124 by using, for example, a brush structure to measure the current I. Therefore, even if the second piezoelectric material 124 rotates along with the rotating object 110, the brush structure will not have the problem that the wire loop is twisted off due to rotation.
It should be noted that the ultrasonic measurement module shown in fig. 2 is only used to illustrate a preferred embodiment, but not to be taken as a limitation. In other words, the ultrasonic measurement module of the present invention may further include more than two sets of piezoelectric materials, so as to more conveniently adapt to the replacement of the rotating object or the difference of the processed object and adjust the optimal ultrasonic vibration frequency of the machine tool at any time.
In summary, the measuring method or module of the present invention can directly measure the ultrasonic vibration frequency of the rotating object of the machine tool during the machining process through the arrangement of at least two piezoelectric materials. Therefore, the ultrasonic vibration of the machine tool during machining can be maintained more conveniently and accurately by a user, so that the machining quality is improved or maintained, and the service life of a rotating object (a tool shank or a chuck in the CNC machine tool) is effectively prolonged.
The above examples are only for illustrating the embodiments of the present invention and illustrating the technical features of the present invention, and are not intended to limit the scope of the present invention. Any arrangement which can be easily changed or equalized by a person skilled in the art is included in the scope of the present invention, which is defined by the following claims.
Claims (10)
1. A method of measuring ultrasonic vibration during processing of a rotating article, comprising the steps of:
mounting at least two piezoelectric materials on the rotating object;
when the rotating object is used for processing, applying electric energy to one of the at least two piezoelectric materials to enable one of the at least two piezoelectric materials to drive the rotating object to generate ultrasonic vibration; and
and a sensor is used for receiving and measuring a current generated by the other of the at least two piezoelectric materials due to the ultrasonic vibration during the processing, thereby estimating the ultrasonic vibration frequency of the rotating object during the processing.
2. The method of claim 1, wherein the at least two piezoelectric materials are a first piezoelectric material and a second piezoelectric material, the first piezoelectric material is used to drive the rotating object to generate the ultrasonic vibration, and the second piezoelectric material generates the current due to the ultrasonic vibration.
3. The method of claim 1, wherein the rotating object is a shank or chuck of a computer numerically controlled machine tool.
4. The method of claim 1, wherein the sensor obtains the current in a non-contact manner by electromagnetic induction principle.
5. The method of claim 1, wherein the sensor is electrically connected to another of the at least two piezoelectric materials to obtain the current.
6. An ultrasonic vibration measurement module for measuring ultrasonic vibration of a rotating object during processing, comprising:
at least two piezoelectric materials disposed on the rotating object, wherein one of the at least two piezoelectric materials drives the rotating object to generate an ultrasonic vibration during processing; and
a sensor for receiving and measuring a current generated by the ultrasonic vibration during the processing of another one of the at least two piezoelectric materials;
wherein, the current is used for estimating the ultrasonic vibration frequency of the rotating object during the processing period.
7. The ultrasonic vibration measurement module of claim 6, wherein the at least two piezoelectric materials are a first piezoelectric material and a second piezoelectric material, the first piezoelectric material is used to drive the rotating object to generate the ultrasonic vibration, and the second piezoelectric material generates the current due to the ultrasonic vibration.
8. The ultrasonic vibration measurement module of claim 6, wherein the rotating object is a tool shank or chuck of a computer numerical control machine tool.
9. The ultrasonic vibration measurement module of claim 6, wherein the sensor obtains the current in a non-contact manner by electromagnetic induction.
10. The ultrasonic vibration measurement module of claim 6, wherein the sensor is electrically connected to another of the at least two piezoelectric materials to obtain the current.
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Citations (7)
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CN101718578A (en) * | 2009-11-13 | 2010-06-02 | 同济大学 | Rotary milling vibration measuring instrument |
US8522893B2 (en) * | 2009-12-31 | 2013-09-03 | Metal Industries Research & Development Centre | Modularized ultrasonic vibration machining apparatus |
JP2014172110A (en) * | 2013-03-07 | 2014-09-22 | Citizen Holdings Co Ltd | Machine tool |
CN107253063A (en) * | 2017-07-25 | 2017-10-17 | 普莱斯(北京)科技有限公司 | A kind of efficient ultrasonic processing unit (plant) |
CN107850484A (en) * | 2015-07-08 | 2018-03-27 | 萨奥有限公司 | Method and apparatus for the resonant frequency of the instrument that measures ultrasonic vibrating machining |
CN108344494A (en) * | 2018-01-22 | 2018-07-31 | 浙江大学 | Low frequency electromagnetic shake table movement velocity detection device based on induction coil |
CN109029690A (en) * | 2018-06-15 | 2018-12-18 | 河南理工大学 | Multi-purpose ultrasonic working state amplitude measuring method and device based on electromagnetic induction principle |
-
2018
- 2018-12-20 CN CN201811567433.XA patent/CN111351565A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101718578A (en) * | 2009-11-13 | 2010-06-02 | 同济大学 | Rotary milling vibration measuring instrument |
US8522893B2 (en) * | 2009-12-31 | 2013-09-03 | Metal Industries Research & Development Centre | Modularized ultrasonic vibration machining apparatus |
JP2014172110A (en) * | 2013-03-07 | 2014-09-22 | Citizen Holdings Co Ltd | Machine tool |
CN107850484A (en) * | 2015-07-08 | 2018-03-27 | 萨奥有限公司 | Method and apparatus for the resonant frequency of the instrument that measures ultrasonic vibrating machining |
CN107253063A (en) * | 2017-07-25 | 2017-10-17 | 普莱斯(北京)科技有限公司 | A kind of efficient ultrasonic processing unit (plant) |
CN108344494A (en) * | 2018-01-22 | 2018-07-31 | 浙江大学 | Low frequency electromagnetic shake table movement velocity detection device based on induction coil |
CN109029690A (en) * | 2018-06-15 | 2018-12-18 | 河南理工大学 | Multi-purpose ultrasonic working state amplitude measuring method and device based on electromagnetic induction principle |
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Application publication date: 20200630 |