CN114317941A - Multi-mode broadband vibration stress relieving method and system - Google Patents
Multi-mode broadband vibration stress relieving method and system Download PDFInfo
- Publication number
- CN114317941A CN114317941A CN202210132482.0A CN202210132482A CN114317941A CN 114317941 A CN114317941 A CN 114317941A CN 202210132482 A CN202210132482 A CN 202210132482A CN 114317941 A CN114317941 A CN 114317941A
- Authority
- CN
- China
- Prior art keywords
- signal
- workpiece
- acceleration
- displacement
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a multimode broadband vibration stress relief method and a multimode broadband vibration stress relief system, wherein the method comprises the steps of detecting the vibration states of three surfaces XY, YZ and XZ of a three-dimensional workpiece through 3 acceleration sensors and 3 displacement sensors for modal analysis, under the frequency spectrum aging mode, the multi-mode peak frequencies of the XY, YZ and XZ surfaces of the three-dimensional workpiece are analyzed in a frequency spectrum mode through a wavelet transformation mode, the system preferably selects multi-order modal frequencies with larger energy factors respectively on the XY, YZ and XZ surfaces of the three-dimensional workpiece for aging treatment, the output is controlled by a microcontroller, the violent multi-vibration type vibration transmission of the vibration exciter to the XY, YZ and XZ surfaces of the three-dimensional workpiece is ensured, therefore, the residual stress of the three-dimensional workpiece is eliminated or homogenized to the maximum extent, the stability of the whole dimensional precision of the whole workpiece can be guaranteed, and the workpiece is prevented from being deformed in a delayed mode or generating cracks.
Description
Technical Field
The invention relates to the field of vibration aging equipment, in particular to a multi-mode broadband vibration stress relieving method and system.
Background
In the manufacture of mechanical parts and components, residual stresses are induced in the material during processing by various techniques such as welding, forging, casting, and heat treatment. Sometimes the peak value of the residual stress exceeds the yield limit of the material (such as welding residual stress), and the excessive residual stress can seriously affect the fatigue strength, the stress corrosion resistance and the dimensional stability of mechanical parts and components, even generate cracks, thereby affecting the use quality and the safety of the mechanical parts and components. Therefore, eliminating residual stress in the workpiece is of great importance to engineering design and machining.
The vibration aging is that the external force generated by the vibration exciter is superposed with the residual stress in the workpiece, and when the sum of the superposed external force and the residual stress is greater than or equal to the yield limit value of the material, the interior of the workpiece generates tiny plastic deformation, so that the residual stress in the workpiece is reduced or homogenized, and the deformation of the workpiece and the cracking of a welding seam are prevented.
At present, the existing vibration aging equipment technology adopts an acceleration sensor to detect the vibration state of a certain surface of a three-dimensional workpiece, belongs to a first-order modal vibration stress relief mode, and can not meet the requirement that each part of each surface of the three-dimensional metal workpiece with a three-dimensional space is effectively and violently vibrated, so that a plurality of parts of other surfaces of the three-dimensional workpiece are weakly vibrated, even not vibrated, and the three-dimensional workpiece can not be thoroughly eliminated or homogenized.
Disclosure of Invention
The invention aims to: in view of the above problems, a method and system for stress relief by multi-mode broadband vibration is provided.
A multi-modal broadband vibration-relief stress system, the method comprising the steps of:
the multimode broadband vibration stress relief system comprises an acceleration signal conditioning module, a first acceleration sensor, a second acceleration sensor, a third acceleration sensor, a displacement signal conditioning module, a first displacement sensor, a second displacement sensor, a third displacement sensor, a speed signal conditioning module, a current signal conditioning module, a PCI (peripheral component interconnect) data acquisition card, a control unit and a vibration exciter; the acceleration signal conditioning module is used for respectively acquiring an XY plane acceleration signal, a YZ plane acceleration signal and an XZ plane acceleration signal of the workpiece through the first acceleration sensor, the second acceleration sensor and the third acceleration sensor, and transmitting the signals to the control unit through the PCI data acquisition card; the displacement signal conditioning module is used for respectively acquiring an XY plane displacement signal, a YZ plane displacement signal and an XZ plane displacement signal of the workpiece through the first displacement sensor, the second displacement sensor and the third displacement sensor, and transmitting the signals to the control unit through the PCI data acquisition card; the speed signal conditioning module is used for acquiring a speed signal of the workpiece; the current signal conditioning module is used for acquiring a real-time current signal when the vibration exciter works; the control unit is used for acquiring the vibration state of the workpiece under the action of the vibration exciter through the PCI data acquisition card, performing wavelet spectrum analysis by utilizing the XY plane acceleration signal, the YZ plane acceleration signal and the XZ plane acceleration signal of the workpiece, and the XY plane displacement signal, the YZ plane displacement signal and the XZ plane displacement signal to obtain the multi-mode frequencies of the XY plane, the YZ plane and the XZ plane of the workpiece, and selecting a plurality of peak frequencies with relatively large energy factors on each plane to control the vibration aging treatment of the working state of the vibration exciter.
The software adopts a virtual instrument software development tool in the field of measurement and control to carry out development and programming for 2 times, and can run under a windows operating system. The interactive virtual instrument development environment with ANIS C as the core organically combines the C language with powerful function and the measurement and control technology, and the spectrum analysis adopts a wavelet transformation mode. The vibration aging mode of the equipment has a wavelet spectrum aging mode. Under the wavelet spectrum aging mode, the vibration states of the three surfaces XY, YZ and XZ of the three-dimensional workpiece are detected through 3 acceleration sensors and 3 displacement sensors for modal analysis, under the spectrum aging mode, the multi-modal peak frequencies of the three surfaces XY, YZ and XZ of the three-dimensional workpiece are analyzed through a wavelet transform mode spectrum, the system conducts aging treatment on the multi-modal frequencies with larger energy factors which are preferably selected by the three surfaces XY, YZ and XZ of the three-dimensional workpiece respectively, and the output is controlled by a microcontroller to ensure that the vibration exciter transmits violent multi-vibration type vibration of the three surfaces XY, YZ and XZ of the three-dimensional workpiece, so that the residual stress of the three-dimensional workpiece is eliminated or homogenized to the maximum extent, the stability of the whole dimensional precision of the whole workpiece can be ensured, and the workpiece is prevented from deforming in a delayed mode or generating cracks.
Furthermore, the multimode broadband vibration stress relief system comprises an upper computer, a display, a printer, a keyboard and a mouse, and can be connected with the lower computer to perform RS232 serial port communication, read out and display the rotating speed of the vibration exciter. The measuring and controlling software can be developed by using c language in the development environment of the interactive virtual instrument, and the vibration displacement value, the speed value and the acceleration value of the workpiece can be measured.
Furthermore, the industrial personal computer is used as an upper computer, and the microcontroller AT89C52 is used as a lower computer.
Furthermore, the PCI acquisition card adopts a parallel mode multi-channel A/D acquisition module design. 32 analog signal inputs with high acquisition rates. The precision of A/D conversion is 16 bits, and three signal amplification factors can be selected by adopting a single-end input mode, and an analog circuit and a digital circuit are electrically isolated by more than or equal to 2000 Vrms. The reference voltage is provided, calibration can be carried out, and conversion precision is improved. Each channel is provided with a corresponding register, data can be stored in real time, after collection is started, the data of each channel can be automatically stored, and a user only needs to read the corresponding register.
Furthermore, the IGBT driving module adopts an EXB841 driving chip, so that the IGBT can be driven and protected.
Furthermore, the IGBT high-power module adopts SKM75GB128D and plays a role in switching direct-current power supply of the motor.
The input end of the driving module is in signal connection with the vibration excitation control end of the control unit, the output end of the driving module is in signal connection with the input end of the IGBT module, and the output end of the IGBT module is in signal connection with the input end of the vibration exciter to control the working state of the vibration exciter.
Furthermore, the high-power vibration exciter adopts a permanent magnet direct current motor with double carbon brushes and an eccentric box structure.
Furthermore, the input end of the power filter is in signal connection with the output end of the IGBT module, and the output end of the power filter is in signal connection with the input end of the vibration exciter.
Furthermore, the current signal conditioning module can measure the current generated when the vibration exciter operates.
Furthermore, the input end of the speed signal conditioning module is in signal connection with the first displacement sensor, the second displacement sensor and the third displacement sensor, and the speed signal of the workpiece is acquired through the displacement sensors; the acceleration signal conditioning module comprises a first acceleration signal conditioning circuit, a second acceleration signal conditioning circuit and a third acceleration signal conditioning circuit, the first acceleration signal conditioning circuit is in signal connection with the first acceleration sensor, the second acceleration signal conditioning circuit is in signal connection with the second acceleration sensor, and the third acceleration signal conditioning circuit is in signal connection with the third acceleration sensor; the displacement signal conditioning module comprises a first displacement signal conditioning circuit, a second displacement signal conditioning circuit and a third displacement signal conditioning circuit, the first displacement signal conditioning circuit is in signal connection with the first displacement sensor, the second displacement signal conditioning circuit is in signal connection with the second displacement sensor, and the third displacement signal conditioning circuit is in signal connection with the third displacement sensor.
Furthermore, 3 acceleration signal conditioning modules are respectively connected with 3 acceleration sensors, three-dimensional workpiece XY, YZ and XZ acceleration signals measured by the three acceleration signal conditioning modules can be divided into 2 paths through the conditioning modules, one path is taken as a collecting signal of wavelet spectrum analysis, the first-order, second-order and multi-order peak frequencies of the workpiece can be found out, the other path is the conditioned acceleration signal and is input into a PCI data acquisition card, and an industrial personal computer reads the collecting signal through software and controls and displays the collecting signal.
Furthermore, the displacement signal conditioning module of the 3 displacement sensors can measure the XY, YZ and XZ three-surface amplitude A values of the workpiece.
Furthermore, the speed signal conditioning module converts the measured displacement signal into a speed signal after being processed by the module, and inputs the speed signal into the PCI data acquisition card, and the industrial personal computer reads the acquired signal through software and controls and displays the acquired signal.
Furthermore, the device software frequency spectrum analysis adopts a wavelet transform technology, the frequency resolution can be improved by utilizing the wavelet transform scale, and the frequency spectrum detection accuracy can also be improved by adjusting the sampling frequency, so that the best wavelet filter which is suitable for signals can be found by the method of changing the scale and adjusting the central frequency, and noise and other harmonic interference can be effectively filtered.
Furthermore, wavelet spectrum analysis is carried out on three surfaces of the three-dimensional workpiece XY, YZ and XZ in a spectrum aging mode through 3 acceleration sensors and 3 displacement sensors, multi-mode frequencies of 3 surfaces are found out, 2-3 peak frequencies (with large amplitude) with large energy factors are selected for each surface, and vibration aging treatment is carried out.
Furthermore, the control unit comprises an industrial personal computer, a communication module and a microcontroller, wherein the industrial personal computer acquires an acceleration signal, a displacement signal, a speed signal and a current signal through a PCI data acquisition card, is in signal connection with the microcontroller through the communication module, and is used for controlling the working state of the vibration exciter.
The invention also provides a multimode broadband vibration stress relief method, which comprises the following steps:
and S1, acquiring workpiece acceleration signals, and acquiring XY plane acceleration signals, YZ plane acceleration signals and XZ plane acceleration signals of the workpiece through the first acceleration sensor, the second acceleration sensor and the third acceleration sensor respectively.
And S2, acquiring a workpiece displacement signal, and respectively acquiring an XY plane displacement signal, a YZ plane displacement signal and an XZ plane displacement signal of the workpiece through a first displacement sensor, a second displacement sensor and a third displacement sensor.
The steps S1 and S2 may be performed simultaneously or may be performed before the steps S1 and S2.
And S3, performing vibration aging treatment, performing wavelet spectrum analysis by using the vibration information acquired in S1 and S2 to obtain multi-mode frequencies of the XY plane, YZ plane and XZ plane of the workpiece, and selecting a plurality of peak frequencies with relatively large energy factors on each plane to perform vibration aging treatment.
Further, in a frequency spectrum aging mode, wavelet spectrum analysis is carried out on data collected on the XY, YZ and XZ surfaces of the three-dimensional workpiece.
Further, the vibration aging treatment mode comprises a wavelet spectrum aging mode: the vibration states of the XY plane, the YZ plane and the XZ plane of the workpiece are detected through the first acceleration sensor, the second acceleration sensor, the third acceleration sensor, the first displacement sensor, the second displacement sensor and the third displacement sensor to perform modal analysis, relative mother wavelets are calculated through wavelet spectrum analysis, a plurality of peak frequencies with relatively large energy factors are selected, a plurality of multi-order modal frequencies with relatively large energy factors are preferably selected on the XY plane, the YZ plane and the XZ plane of the three-dimensional workpiece respectively to perform aging treatment, wavelet spectrum coefficients are reduced, and residual stress in multi-dimensional distribution is reduced.
Further, the vibration aging treatment mode comprises a frequency spectrum aging mode: and applying periodic external force to the workpiece through a vibration exciter, when the frequency of the applied periodic external force is consistent with the natural frequency of the workpiece, enabling the workpiece to resonate, recording all natural frequencies capable of generating resonance, generating dynamic stress, and superposing the dynamic stress and the residual stress to reduce peak residual stress.
Further, the method comprises the following steps: acquiring a workpiece speed signal, calculating a speed signal of the workpiece according to the workpiece displacement signal, acquiring a current signal of a vibration exciter, and acquiring a real-time current signal of the vibration exciter during working; and displaying the vibration speed value, the acceleration value, the displacement value and the real-time current data of the vibration exciter of the workpiece on the XY, YZ and XZ surfaces on a screen.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention at least comprise:
a multimode mode is innovatively adopted, the effect of broadband vibration stress relief can be achieved, three-dimensional multi-face, multi-vibration-mode and multi-dimensional workpiece residual stress relief processing can be performed by collecting signals of three-dimensional acceleration, amplitude displacement and the like of the XY face, the YZ face and the XZ face of the workpiece, so that any part of the whole three-dimensional workpiece can be ensured to be subjected to violent vibration transmission, and peak residual stress of the whole three-dimensional workpiece on any part of the XY face, the YZ face and the XZ face is relieved or homogenized.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a functional block diagram of the system software design of the present invention.
FIG. 2 is a schematic diagram of the interfaces of three XY, YZ and XZ surfaces of a three-dimensional workpiece.
Fig. 3 is a system configuration diagram of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features are expressly stated.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention provides a multi-mode broadband vibration stress relieving method based on a multi-mode broadband vibration aging technology. As shown in fig. 1, fig. 1 is a functional block diagram of the system software design of the present invention. The system software adopts a virtual instrument software development tool in the field of measurement and control to carry out secondary development and programming and can run under a windows operating system. The interactive virtual instrument development environment with ANIS C as the core organically combines the C language with powerful function and the measurement and control technology, and the spectrum analysis adopts a wavelet transformation mode. The vibration aging mode of the equipment has a wavelet spectrum aging mode. In a wavelet spectrum aging mode, vibration states of three surfaces XY, YZ and XZ of the three-dimensional workpiece shown in fig. 2 are detected through 3 acceleration sensors and 3 displacement sensors for modal analysis, multi-modal peak frequencies of the three surfaces XY, YZ and XZ of the three-dimensional workpiece are analyzed through a wavelet transform mode spectrum, and a system performs aging treatment on the three surfaces XY, YZ and XZ of the three-dimensional workpiece by preferably selecting multi-order modal frequencies with larger energy factors respectively, such as large amplitude, so that severe multi-vibration type vibration transmission can be obtained on the three surfaces XY, YZ and XZ of the three-dimensional workpiece, residual stress of the three-dimensional workpiece is eliminated or homogenized to the maximum extent, and stability of dimensional accuracy of the three-dimensional workpiece is improved.
In the frequency spectrum aging mode, a periodic external force can be applied to the workpiece through a vibration exciter, when the frequency of the applied periodic external force is consistent with the natural frequency of the workpiece, the workpiece generates resonance, all the natural frequencies capable of generating resonance are recorded and are superposed with the residual stress, and the peak residual stress is reduced.
The invention adopts simple visual virtual instrument panel and other graphic user interface designs, utilizes the parameters of function panel input function, and adopts event-driven and callback function programming technology, thereby effectively improving the efficiency and reliability of engineering design, and conveniently realizing complex data acquisition and virtual instrument development of instrument control system.
As shown in fig. 3, the present invention also provides a multi-modal wideband vibration stress-relief system corresponding to the multi-modal wideband vibration stress-relief method provided by the present invention, wherein the system comprises an acceleration signal conditioning module, a first acceleration sensor, a second acceleration sensor, a third acceleration sensor, a displacement signal conditioning module, a first displacement sensor, a second displacement sensor, a third displacement sensor, a speed signal conditioning module, a current signal conditioning module, a PCI data acquisition card, a control unit, and a vibration exciter. The control unit can control each part and each module to carry out vibration aging treatment according to the multi-mode broadband vibration stress relief method.
And the control unit is used for acquiring the vibration state of the workpiece under the action of the vibration exciter through the PCI data acquisition card, and controlling the vibration exciter to increase the rotating speed, reduce the rotating speed, maintain the rotating speed and other working states by using the functional scheduling module.
The acceleration signal conditioning module is used for respectively acquiring XY plane acceleration signals, YZ plane acceleration signals and XZ plane acceleration signals of the workpiece through the first acceleration sensor, the second acceleration sensor and the third acceleration sensor, and transmitting the XY plane acceleration signals, the YZ plane acceleration signals and the XZ plane acceleration signals to the control unit through the PCI data acquisition card. In addition, the acceleration signal conditioning module may include a first acceleration signal conditioning circuit, a second acceleration signal conditioning circuit, and a third acceleration signal conditioning circuit, and conditions such as amplification, noise reduction, and the like are performed on acceleration signals through 3 acceleration signal conditioning circuits, respectively, the first acceleration signal conditioning circuit is in signal connection with the first acceleration sensor, the second acceleration signal conditioning circuit is in signal connection with the second acceleration sensor, and the third acceleration signal conditioning circuit is in signal connection with the third acceleration sensor.
Generally, 3 acceleration sensors can be adopted to acquire XY plane acceleration signals, YZ plane acceleration signals and XZ plane acceleration signals of the three-dimensional workpiece, the 3-path acceleration signals are conditioned and then used as data acquisition signals for wavelet spectrum analysis, and the first-order, second-order and/or multi-order peak frequencies of the XY, YZ and XZ planes of the three-dimensional workpiece can be found out.
With respect to first, second and/or multiple order multi-modal vibrational states are meant: the vibration wave of the vibration exciter is a sine wave, and the sine vibration condition is determined by three parameters of frequency, amplitude and vibration duration. The mode is the natural vibration characteristic of the mechanical structure, and each order mode corresponds to a specific natural frequency, a mode shape and a damping ratio. The first-order mode appears when the excitation frequency of the external force is equal to the natural frequency of the object, and the vibration form of the object is called a first-order mode or a main mode; the second-order mode appears when the excitation frequency of the external force is twice of the natural frequency of the object, and the vibration form of the object is called a second-order mode at the moment; and so on to the multi-modal vibrational state.
The displacement signal conditioning module in the system is used for respectively acquiring an XY plane displacement signal, a YZ plane displacement signal and an XZ plane displacement signal of the workpiece through the first displacement sensor, the second displacement sensor and the third displacement sensor, and transmitting the signals to the control unit through the PCI data acquisition card. Optionally, the displacement signal conditioning module includes a first displacement signal conditioning circuit, a second displacement signal conditioning circuit, and a third displacement signal conditioning circuit, and conditions such as amplification, noise reduction, and the like are performed on the displacement signal through 3 paths of displacement signal conditioning circuits, respectively, the first displacement signal conditioning circuit is in signal connection with the first displacement sensor, the second displacement signal conditioning circuit is in signal connection with the second displacement sensor, and the third displacement signal conditioning circuit is in signal connection with the third displacement sensor.
Optionally, the displacement signal conditioning module can adopt a hall displacement sensor, after the displacement signal conditioning module is amplified by a displacement signal conditioning circuit, the vibration displacement values of the three surfaces of XY, YZ and XZ are transmitted to the industrial personal computer through a PCI data acquisition card, and the amplitude values of the three surfaces of the workpiece can be measured through the displacement sensor.
And the speed signal conditioning module is used for acquiring the speed signal of the workpiece. Optionally, the speed signal of the workpiece may be directly obtained by a displacement sensor, and the input end of the speed signal conditioning module is in signal connection with the first displacement sensor, the second displacement sensor and the third displacement sensor.
And the current signal conditioning module is used for acquiring a real-time current signal when the vibration exciter works. The current signal of the vibration exciter can be collected through the mutual inductor.
In some embodiments, the control unit may include an industrial personal computer, a communication module, and a microcontroller, the industrial personal computer obtains an acceleration signal, a displacement signal, a velocity signal, and a current signal through a PCI data acquisition card, the industrial personal computer is in signal connection with the microcontroller through the communication module, and the microcontroller is configured to control a working state of the vibration exciter.
Furthermore, the system of the invention can also comprise an IGBT module and a driving module, wherein the input end of the driving module is in signal connection with the excitation control end of the control unit, the output end of the driving module is in signal connection with the input end of the IGBT module, and the output end of the IGBT module is in signal connection with the input end of the vibration exciter so as to control the working state of the vibration exciter. The IGBT module can be composed of an IGBT tube and a voltage and current protection plate thereof.
The system also comprises a power supply filter, wherein the input end of the power supply filter is in signal connection with the output end of the IGBT module, and the output end of the power supply filter is in signal connection with the input end of the vibration exciter. The system also comprises a display connected with the industrial personal computer through the communication module, and the display can be used for displaying vibration parameters acquired by the PCI data acquisition card and the rotating speed of the vibration exciter. The system also comprises a printer connected with the industrial personal computer through the communication module. The system also comprises a printer keyboard mouse connected with the industrial personal computer through the communication module, and is used for realizing the control of the system, and a touch display can be used for replacing the keyboard mouse.
In the embodiment of the invention, the industrial personal computer can be used as an upper computer, and the microcontroller can be used as a lower computer. The microcontroller adopts AT89C52 chip, and liftable rotational speed and steady speed come accurate control vibration exciter rotational speed size, and communication module can select RS232 serial ports communication module for use, such as devices such as MAX232 CFE. The IGBT driving module can adopt an EXB841 driving chip, and can realize the driving and the protection of an IGBT model. The IGBT module can adopt SKM75GB128D and is used as a switch for direct current supply of a motor of the vibration exciter.
The vibration exciter can adopt a permanent magnet direct current motor with double carbon brushes and an eccentric box structure. The vibration exciter can also be provided with a speed sensor for acquiring the motor speed of the vibration exciter. The speed sensor can be an optical coupler, the rotating speed of the motor is measured by the optical coupler on the motor of the vibration exciter, the speed measuring disc is a 15-tooth disc, the direct-current permanent magnet motor shaft drives the speed measuring disc to rotate, and the rotating speed of the motor can be measured by the optical coupler.
The PCI data acquisition card can adopt a high-speed PCI acquisition card designed by a parallel mode multi-channel A/D acquisition module, the precision of A/D conversion is 16 bits, a single-end input mode is adopted, 32-channel analog signal input with high acquisition rate can be realized, three signal amplification times can be selected, an analog circuit and a digital circuit are electrically isolated by more than or equal to 2000Vrms, reference voltage is provided, calibration can be carried out to improve the conversion precision, each channel is provided with a corresponding register, data can be stored in real time, after data acquisition is started, the data of each channel can be automatically stored, and a user only needs to read the corresponding register.
The invention utilizes 3 acceleration sensors and 3 displacement sensors to collect three-dimensional acceleration and amplitude displacement signals of XY surfaces, YZ surfaces and XZ surfaces of a three-dimensional workpiece, and provides a hardware support environment for realizing three-dimensional multi-surface, multi-vibration-mode and multi-dimensional workpiece residual stress elimination treatment. Wavelet spectrum analysis can be carried out subsequently through industrial personal computer software, multi-mode frequency of 3 surfaces of the workpiece can be calculated, 2-3 peak frequencies with larger energy factors can be selected on each surface of XY, YZ and XZ for vibration aging treatment, so that any part of the three-dimensional workpiece can be strongly vibrated, residual stress can be fully eliminated or homogenized, the stability of the whole size precision of the whole workpiece is guaranteed, and the workpiece is prevented from being deformed in a delayed mode or generating cracks.
The industrial personal computer is in serial communication with the microcontroller through the serial communication module, and reads and displays the motor rotating speed of the vibration exciter. The microcontroller sends a control electric signal to the IGBT driving module, and the on-off of the IGBT module is controlled by the control electric signal. If the IGBT module is switched on, the power supply filter module provides voltage to drive the vibration exciter to operate, and if the IGBT module is switched off, the power supply filter module does not provide voltage and the vibration exciter stops operating.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification.
Claims (10)
1. The multimode broadband vibration stress relief method is characterized by comprising the following steps of:
s1, acquiring workpiece acceleration signals, and acquiring XY plane acceleration signals, YZ plane acceleration signals and XZ plane acceleration signals of the workpiece through a first acceleration sensor, a second acceleration sensor and a third acceleration sensor respectively;
s2, acquiring a workpiece displacement signal, and respectively acquiring an XY plane displacement signal, a YZ plane displacement signal and an XZ plane displacement signal of the workpiece through a first displacement sensor, a second displacement sensor and a third displacement sensor;
and S3, performing vibration aging treatment, namely performing wavelet spectrum analysis by using the XY plane acceleration signal, the YZ plane acceleration signal and the XZ plane acceleration signal of the workpiece, and the XY plane displacement signal, the YZ plane displacement signal and the XZ plane displacement signal to obtain multi-mode frequencies of the XY plane, the YZ plane and the XZ plane of the workpiece, and selecting a plurality of energy factor peak frequencies on each plane to perform vibration aging treatment.
2. The method of claim 1, wherein the vibro-aging process comprises wavelet spectrum analysis in a spectrum aging mode, wherein the frequency resolution can be improved by wavelet transformation scale, and the spectrum detection accuracy can also be improved by adjusting the sampling frequency, so that the best wavelet filter for adapting to the signal can be found by the method of changing scale and adjusting the center frequency, and noise and other harmonic interference can be effectively filtered; the vibration states of the XY plane, the YZ plane and the XZ plane of the workpiece can be detected through S1 and S2, a plurality of peak frequencies with relatively large energy factors are selected for vibration aging treatment, an external force is applied to the workpiece through a vibration exciter, when the frequency of the applied periodic external force is consistent with the natural frequency of the workpiece, the workpiece resonates, all the natural frequencies capable of generating the resonance are recorded and are superposed with the residual stress, and the residual stress in multi-dimensional distribution is reduced.
3. A multi-modal broadband vibration canceling stress system, comprising: the device comprises an acceleration signal conditioning module, a displacement signal conditioning module, a speed signal conditioning module, a current signal conditioning module, a PCI data acquisition card, a control unit and a vibration exciter;
the acceleration signal conditioning module comprises a first acceleration sensor, a second acceleration sensor and a third acceleration sensor which are used for respectively acquiring XY plane acceleration signals, YZ plane acceleration signals and XZ plane acceleration signals of the workpiece;
the displacement signal conditioning module comprises a first displacement sensor, a second displacement sensor and a third displacement sensor which are used for respectively acquiring an XY plane displacement signal, a YZ plane displacement signal and an XZ plane displacement signal of the workpiece;
the control unit comprises an upper computer machine controller, a lower computer microcontroller, a communication module, an IGBT driver, a high-power module and a power supply filter.
4. The system according to claim 3, wherein the PCI data acquisition card is used for calculating a speed signal of the workpiece according to the workpiece displacement signal, acquiring a current signal of the vibration exciter and acquiring a real-time current signal of the vibration exciter during operation; and displaying the vibration speed value, the acceleration value, the displacement value and the real-time current data of the vibration exciter of the workpiece on the XY, YZ and XZ surfaces on a screen.
The acceleration signal conditioning module is used for acquiring an acceleration signal of a workpiece and transmitting the acceleration signal to the control unit through the PCI data acquisition card;
the displacement signal conditioning module is used for respectively acquiring displacement signals of all surfaces of the workpiece through the displacement sensor and transmitting the displacement signals to the control unit through the PCI data acquisition card;
the speed signal conditioning module is used for acquiring a speed signal of the workpiece;
the current signal conditioning module is used for acquiring a real-time current signal when the vibration exciter works;
the control unit is used for acquiring the vibration state of the workpiece under the action of the vibration exciter through the PCI data acquisition card, performing wavelet spectrum analysis by utilizing workpiece acceleration signals and displacement signals to obtain multi-mode frequency of the workpiece, selecting a plurality of peak frequencies with relatively large energy factors on each surface, and controlling the vibration aging treatment of the working state of the vibration exciter.
5. The system of claim 3, wherein the industrial personal computer obtains signals through a PCI data acquisition card, and the PCI data acquisition card is designed by adopting a parallel multi-channel A/D acquisition module and can obtain acceleration signals, displacement signals, speed signals and current signals.
6. The system of claim 3, wherein the industrial personal computer is in signal connection with the microcontroller through a communication module; and the microcontroller adopts AT89C52 to carry out RS232 serial port communication, reads and displays the rotating speed of the vibration exciter and is used for controlling the working state of the vibration exciter.
7. The system of claim 3, further comprising: the high-power vibration exciter comprises an IGBT module and a driving module, wherein the IGBT driving module adopts an EXB841 driving chip, the IGBT high-power module adopts SKM75GB128D, the input end of the driving module is in signal connection with the vibration excitation control end of the control unit, the output end of the driving module is in signal connection with the input end of the IGBT module, and the output end of the IGBT module is in signal connection with the input end of the vibration exciter so as to control the working state of the vibration exciter.
8. The system of claim 3, further comprising: and the input end of the power supply filter is in signal connection with the output end of the IGBT module, and the output end of the power supply filter is in signal connection with the input end of the vibration exciter.
9. The system of claim 3, wherein the acceleration signal conditioning module comprises a first acceleration signal conditioning circuit, a second acceleration signal conditioning circuit, and a third acceleration signal conditioning circuit, the first acceleration signal conditioning circuit being in signal connection with the first acceleration sensor, the second acceleration signal conditioning circuit being in signal connection with the second acceleration sensor, and the third acceleration signal conditioning circuit being in signal connection with the third acceleration sensor.
10. The system of claim 3, wherein the displacement signal conditioning module comprises a first displacement signal conditioning circuit, a second displacement signal conditioning circuit, and a third displacement signal conditioning circuit, the first displacement signal conditioning circuit in signal communication with the first displacement sensor, the second displacement signal conditioning circuit in signal communication with the second displacement sensor, and the third displacement signal conditioning circuit in signal communication with the third displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210132482.0A CN114317941A (en) | 2022-02-14 | 2022-02-14 | Multi-mode broadband vibration stress relieving method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210132482.0A CN114317941A (en) | 2022-02-14 | 2022-02-14 | Multi-mode broadband vibration stress relieving method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114317941A true CN114317941A (en) | 2022-04-12 |
Family
ID=81030461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210132482.0A Pending CN114317941A (en) | 2022-02-14 | 2022-02-14 | Multi-mode broadband vibration stress relieving method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114317941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116401534A (en) * | 2023-06-08 | 2023-07-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Pulse pressure modal component separation method |
-
2022
- 2022-02-14 CN CN202210132482.0A patent/CN114317941A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116401534A (en) * | 2023-06-08 | 2023-07-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Pulse pressure modal component separation method |
| CN116401534B (en) * | 2023-06-08 | 2023-08-01 | 中国空气动力研究与发展中心高速空气动力研究所 | Pulse pressure modal component separation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101829951B (en) | Outer circle grinding workpiece surface quality visualized real-time monitoring method | |
| US11327054B2 (en) | System for determining excitation frequency of vibratory stress relief and method therefor | |
| CN114317941A (en) | Multi-mode broadband vibration stress relieving method and system | |
| CN102692321A (en) | Rigidity measuring device for grinding carriage spindle of cylindrical grinding machine | |
| CN102323779B (en) | Measurement and control sensor network for heavy numerical control equipment | |
| CN103962629B (en) | A kind of wire pulling method device of workpiece attached supersonic vibration | |
| CN101697072A (en) | System and method for diagnosing faults of numerical control machine | |
| CN101794138A (en) | Dynamic characteristic test and analysis system for numerical control machine tool | |
| CN101806917A (en) | Device and method for detecting remainder of sealed electronic element based on random vibration | |
| CN103786093B (en) | What a kind of grinding status monitored in real time graphically detects display packing | |
| CN105818088A (en) | Detection method and device for number of impact times of impact type fastening tool | |
| CN103557931A (en) | Ultrasound amplitude measuring device and method based on constant force control | |
| CN217052329U (en) | Multi-mode broadband vibration stress relief system | |
| CN103447887B (en) | Based on sawing Weight detector and the method for band saw for metal Acoustic Emission Characteristic | |
| CN106834657A (en) | A kind of multidimensional high frequency microscopic vibration aging system and method | |
| CN106363463A (en) | Milling flutter on-line monitoring method based on energy occupation ratio | |
| CN2593204Y (en) | Multifunctional comprehensive power virtual measuring analyser | |
| CN202648935U (en) | Cylindrical grinding machine grinding carriage main shaft rigidity measuring device | |
| CN114623923A (en) | Verification test system and method for tower top low-frequency vibration sensor of wind turbine generator | |
| CN101691632B (en) | Method for rapidly judging peak | |
| CN111580457B (en) | Method for inhibiting machining oscillation lines of numerical control machine tool by using acceleration gauge | |
| CN203830831U (en) | Broaching machining device adding ultrasonic vibration to workpiece | |
| CN111982368A (en) | Online torque test system for power steering gear of commercial vehicle | |
| CN103397174B (en) | Device and method for eliminating stress by utilizing modal broadband vibration | |
| JP5647439B2 (en) | Servo motor health warning device and calculation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |