CN110423882A - High-frequency vibration aging technique parameter determination system and method - Google Patents
High-frequency vibration aging technique parameter determination system and method Download PDFInfo
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Abstract
A kind of high-frequency vibration aging technique parameter determination system of present disclosure, including high-frequency excitation processing module, plastic deformation detection module, excited vibration stress mornitoring module and master system；The master system includes residual stress memory module, finite element analysis module, strain peak value obtains and dynamic stress conversion module, sound emission signal characteristic obtain module and technological parameter setup module.The present invention discloses a kind of high-frequency vibration aging technique parameter determination method simultaneously, comprising the following steps: the range of choice of high-frequency vibration aging technique parameter is primarily determined using the finite element analysis module；Need effect to be achieved that specific threshold limit value is set according to experiment；Based on the range of choice of the high-frequency vibration aging technique parameter primarily determined, carries out high-frequency vibration timeliness experimental study, determine preferred high-frequency vibration aging technique parameter selection range.The present invention has the advantages that can be stablized and ideal timeliness effect.
Description
Technical field
The present invention relates to vibration aging technology fields, and in particular to a kind of high-frequency vibration aging technique parameter determination system and
Method.
Technical background
In currently used method for removing residual stress, vibration aging technology is by eradicating efficacy is good, energy conservation and environmental protection, easily
On site operation, it is high-efficient the advantages that and by the favor of vast enterprise.Before carrying out vibration stress relief treatment to workpiece, it is necessary first to really
Determine the technological parameter of oscillating aging.It is therefore desirable to determine that system conducts a research to vibration aging technology technological parameter, research
Achievement can further push application and development of the vibration aging technology in manufacturing industry.
Vibration Aging Process directly affects the eradicating efficacy of residual stress, at present grinding for Vibration Aging Process parameter
Study carefully and is concentrated mainly on exciting dynamic stress, excited frequency and exciting time.
(1) exciting dynamic stress
By the Macro Mechanism of vibration aging technology it is found that exciting dynamic stress and inside workpiece residual stress that vibration excitor applies
The sum of must be over the yield strength of workpiece, while in order to make workpiece not generate fatigue damage, the exciting dynamic stress of application is necessary
It is less than the fatigue strength of workpiece.On the basis of above-mentioned exciting dynamic stress selection principle, the scholars such as Cai Qiunan (oscillating aging work
The optimization principles of skill parameter, Hohai University's Mechanical Academy journal) utilize overload factor K (i.e. initial in exciting dynamic stress and workpiece
The ratio of residual stress) choose exciting dynamic stress size；The scholars such as Xu Xiujuan (the oscillating aging exciting force based on fatigue limit
Selection, Beijing Institute of Technology's journal) by the graceful range of stress figure in Gourde(G) under unsymmetrical cycle, give oscillating aging
The range of choice of exciting dynamic stress in the process.
(2) excited frequency
According to forced vibration theory it is found that when the external excited frequency for applying load is equal to the resonant frequency of workpiece, work
Part can generate covibration, so that inside workpiece particle can be made to generate violent vibration, be conducive to inside workpiece residual stress
Relaxation.The determination of vibration aging technology excited frequency mainly uses frequency sweep method at present, i.e., determines workpiece by frequency sweep method first
Then resonant frequency chooses a frequency in its subresonance frequency range and carries out vibration stress relief treatment, but for exciting frequency
The relationship between the vibration shape corresponding to resonant frequency and inside workpiece residual stress distribution state is not considered in the determination of rate, is led
When causing to carry out vibration stress relief treatment under the frequency of selection, it often will appear the very limited phenomenon of residual stress eradicating efficacy.
(3) the exciting time
The exciting time too short eradicating efficacy that will lead to residual stress is not achieved expection, opposite exciting overlong time, not only
Reduce economic benefit, it is also possible to progressive damage be generated to workpiece, the usual exciting time is no more than 40 minutes.At present when exciting
Between determination mainly use following two method: 1. according to the quality of workpiece；2. according to the amplitude-versus-frequency curve of oscillating aging.On
It states both of which and dependent on experience and lacks complete theoretical basis there are certain subjectivity, therefore the determination of exciting time
There are also to be improved for method.
In addition, the technological parameter of oscillating aging further includes Support Position and Position of Vibrating, wherein Support Position should be as far as possible
Selection is on the node or nodel line of vibration, and Position of Vibrating is typically chosen in the amplitude larger part of workpiece.
In conclusion the formulation due to technological parameter still relies primarily on experience, cause workpiece by vibration stress relief treatment
By often will appear the unstable and undesirable situation of timeliness effect.In addition, conventional vibration ageing technique uses adjustable speed motor
As vibration excitor, and it is directly anchored to workpiece surface, carries out ageing treatment by injecting low-frequency vibration energy to workpiece,
Workpiece internal dislocation density after low-frequency vibration ageing treatment increases, and high-frequency vibration ageing technique uses electromagnetic vibration platform
As vibration excitor, and by the direct clamping of small size workpiece on the moving component surface of electromagnetic vibration platform or directly by electromagnetic type
The moving component surface of shake table is contacted with the regional area of large complicated workpiece, and high-frequency vibratory energy is injected into workpiece
Portion, workpiece internal dislocation density after high-frequency vibration ageing treatment are reduced, above research shows that high-frequency vibration ageing technique
There is apparent differences on the mechanism for eliminating residual stress with low-frequency vibration ageing technique, it is therefore necessary to high frequency vibrating
Dynamic aging technique conducts a research, and forms a kind of technological parameter suitable for high-frequency vibration ageing technique and determines system, power-assisted high frequency
Application of the vibration aging technology in engineering field.
It is according to the microcosmic mechanism of oscillating aging it is found that microcosmic caused by the release of residual stress is primarily due to dislocation motion
Plastic deformation and generate, however do not go out at present from the microcosmic mechanism of oscillating aging when determining Vibration Aging Process parameter
Hair.Therefore, it determines that method formulates the high-frequency vibration aging technique parameter of workpiece using current technological parameter, is unfavorable for being managed
The timeliness effect thought.If there is a kind of method can be in high-frequency vibration ag(e)ing process, the microplasticity of real-time detection to workpiece
Deformation, and determines high-frequency vibration aging technique parameter with this, is beneficial to be stablized and ideal timeliness effect.Workpiece by
When elastic-plastic deformation occurs for external force, the phenomenon that strain energy is released in the form of elastic wave, referred to as sound emission.It is produced by sound emission
The microcosmic mechanism of raw mechanism and oscillating aging, we are it is seen that workpiece will necessarily produce in high-frequency vibration ageing process
Raw acoustic emission signal, therefore acoustic emission is fused in current high-frequency vibration aging system, and is joined as technique
The fixed foundation of numeral system, is beneficial to be stablized and ideal timeliness effect.
Determination for current high-frequency vibration aging technique parameter still needs by experience and when not from high-frequency vibration
The problem of microcosmic mechanism of effect is set out, the present invention propose a kind of high-frequency vibration aging technique parameter determination system, and use has first
It limits first numerical simulation technology and primarily determines high-frequency vibration aging technique parameter area, then further determined that using acoustic emission
Preferred high-frequency vibration aging technique parameter area.It uses proposed by the present invention with finite element numerical simulation technology and sound emission skill
The technological parameter that high-frequency vibration aging technique parameter determination system based on art determines carries out at high-frequency vibration timeliness workpiece
Reason help to obtain stable and ideal timeliness effect, thus application of the power-assisted high-frequency vibration ageing technique in engineering field.
Summary of the invention
Determination for current high-frequency vibration aging technique parameter still needs by experience and when not from high-frequency vibration
The problem of microcosmic mechanism of effect is set out, the present invention proposes a kind of high-frequency vibration aging technique parameter determination system, i.e., by finite element
Numerical simulation technology and acoustic emission are fused to current high-frequency vibration aging technique parameter determination system.It is proposed using the present invention
High-frequency vibration aging technique parameter determination system determine technological parameter to workpiece carry out high-frequency vibration ageing treatment, be conducive to
The stability for improving high-frequency vibration timeliness effect, thus application of the power-assisted high-frequency vibration ageing technique in engineering field.
High-frequency vibration aging technique parameter determination system, including high-frequency excitation processing module, plastic deformation detection module, swash
Vibration stress detection module and master system；The high-frequency excitation processing module detects mould with the plastic deformation respectively
Block is connected with the excited vibration stress mornitoring module；The plastic deformation detection module and the excited vibration stress mornitoring
Module is connect with the master system respectively；The master system is connect with the high-frequency excitation processing module；
The master system control high-frequency excitation processing module generates high-frequency vibration；The plastic deformation detection module
Using the plastic deformation in acoustic emission detection workpiece ageing process；The excited vibration stress mornitoring module detects work
Exciting dynamic stress in part ageing process；The high-frequency excitation processing module includes that card occurs for random waveform, power is put
Big device and high-frequency vibration exciter；The plastic deformation detection module includes acoustic emission sensor, acoustic emission signal amplifier sum number
According to capture card；The excited vibration stress mornitoring module includes strain transducer and dynamic strain indicator；The master system
It is obtained including residual stress memory module, finite element analysis module, strain peak value special with dynamic stress conversion module, acoustic emission signal
Sign obtains module and technological parameter setup module.
Further, the size and distribution of residual stress memory module storage workpiece surface residual stress；
The residual stress size and distribution can be obtained using finite element numerical simulation technology, can also use experiment side
Method test obtains；The experimental method includes orifice method and X-ray diffraction method.
Further, the sound emission signal characteristic obtains module and extracts the collected acoustic emission signal of data collecting card
Characteristic value；The eigenvalue of the acoustic emission signal is RMS voltage (RMS).
Further, the strain peak value, which is obtained, extracts the collected strain wave of dynamic strain indicator with dynamic stress conversion module
The peak value of shape, and the elastic modulus E (GPa) of workpiece is preset in the acquisition of strain peak value and dynamic stress conversion module；Institute
Transformational relation between the exciting dynamic stress stated and the strain peak value isWherein σ answers for excited vibration
Power.
Further, the master system is connect with the input terminal that the random waveform is blocked；Described is any
The output end of waveform card is connect with the input terminal of the power amplifier；The output end of the power amplifier and institute
The input terminal for the high-frequency vibration exciter stated connects；The master system control random waveform generation card generation is sinusoidal to swash
Shake signal；After the sine excitation signal amplifies via power amplifier, the high-frequency vibration exciter is driven to generate high frequency vibrating
It is dynamic；The acoustic emission sensor installation is on the surface of the workpiece；The output end of the acoustic emission sensor and the sound are sent out
Penetrate the input terminal connection of signal amplifier；The output end of the acoustic emission signal amplifier is defeated with the data collecting card
Enter end connection；The output end of the data collecting card is connect with the master system；The excited vibration stress mornitoring
Module includes strain transducer and dynamic strain indicator；The strain transducer is pasted on the workpiece surface；Described
The output end of strain transducer is connect with the input terminal of the dynamic strain indicator；The output end of the dynamic strain indicator and institute
The master system connection stated.
Further, the high-frequency vibration exciter is electromagnetic actuator.
The high-frequency vibration aging technique parameter determination system determines technological parameter, and steps are as follows:
(1) vibration shape is strained using each rank that the modal analysis method in the finite element analysis module obtains workpiece, obtained
Region where straining vibration shape large strain to each rank；Choose the region where straining vibration shape large strain and the larger remnants of workpiece
The preferred vibration shape of the consistent strain vibration shape in region as high-frequency vibration ageing treatment where stress；The preferred vibration shape institute is right
The frequency answered is preferred excited frequency fi(i=1,2 ..., N, wherein N is positive integer), and preferred excited frequency fiDescribed
High-frequency vibration exciter operating frequency range in；
(2) use the harmonic responding analysis method in the finite element analysis module in the subresonance of preferred excited frequency
Harmonic responding analysis is carried out to workpiece in frequency range, obtains different excited frequencies, exciting dynamic stress, exciting time and pretightning force
Workpiece stress distribution under effect, primarily determines the range of choice of high-frequency vibration aging technique parameter on this basis, and
It stores in the technological parameter setup module；The pretightning force refers to the high-frequency vibration exciter moving component surface
Contact force between workpiece surface；The pretightning force is too small, and the energy of high-frequency vibration exciter is caused not to be injected into effectively
Material internal, the pretightning force is excessive, causes high-frequency vibration exciter that can not generate effective high-frequency vibration, in both circumstances
It will cause workpiece after high-frequency vibration ageing treatment, ideal timeliness effect can not be obtained；
(3) different technical parameters are carried out to workpiece and acts on lower high-frequency vibration ageing treatment, extract the sound emission of acquisition back
The characteristic value of signal, while test obtains the residual stress relief ratio of workpiece, and sound emission letter is obtained by way of curve matching
Number characteristic value and residual stress relief ratio between functional relation, when residual stress relief ratio reaches 50%, record correspond to
Acoustic emission signal characteristic value, and be set to the threshold limit value of sound emission signal characteristic value.For specific Threshold extent
The setting of value can also need effect to be achieved to be determined according to experiment；
(4) based on the range of choice of the high-frequency vibration aging technique parameter primarily determined, carry out high-frequency vibration timeliness
Experimental study；The acoustic emission signal under different technical parameters effect is acquired, its characteristic value is extracted, when the sound that the extraction obtains
When emitting signal characteristic value more than its threshold limit value, the technological parameter of high-frequency vibration ageing treatment at this time is recorded, it is basic herein
The upper preferred high-frequency vibration aging technique parameter selection range of determination, and store into technological parameter setup module.
Beneficial effects of the present invention are as follows:
1, a kind of high-frequency vibration aging technique parameter determination system proposed by the present invention uses finite element numerical simulation skill
Art can reduce cost, while the program of finite element numerical simulation can be realized automatic cycle operation, reduce operator's
Workload further improves efficiency.
2, a kind of high-frequency vibration aging technique parameter determination system proposed by the present invention passes through the strain vibration shape and residual stress
The regularity of distribution determines the excited frequency of high-frequency vibration timeliness, help to obtain ideal high-frequency vibration timeliness effect.
3, a kind of high-frequency vibration aging technique parameter determination system proposed by the present invention uses acoustic emission, can solve
It is not help to obtain from the problem of the microcosmic mechanism of high-frequency vibration timeliness when certainly high-frequency vibration aging technique parameter determines
Stable and ideal timeliness effect.
Detailed description of the invention
Fig. 1 is high-frequency vibration aging technique parameter determination system schematic diagram of the present invention.
Fig. 2 is the master system schematic diagram of high-frequency vibration aging technique parameter determination system of the present invention.
Fig. 3 is that the large-size workpiece high-frequency excitation processing module of high-frequency vibration aging technique parameter determination system of the present invention is shown
It is intended to.
Fig. 4 is that the small size workpiece high-frequency excitation processing module of high-frequency vibration aging technique parameter determination system of the present invention is shown
It is intended to.
Specific embodiment
Referring to attached drawing, the present invention is further illustrated:
Embodiment one
High-frequency vibration aging technique parameter determination system, including high-frequency excitation processing module, plastic deformation detection module, swash
Vibration stress detection module and master system；The high-frequency excitation processing module detects mould with the plastic deformation respectively
Block is connected with the excited vibration stress mornitoring module；The plastic deformation detection module and the excited vibration stress mornitoring
Module is connect with the master system respectively；The master system is connect with the high-frequency excitation processing module；
The master system control high-frequency excitation processing module generates high-frequency vibration；The plastic deformation detection module
Using the plastic deformation in acoustic emission detection workpiece ageing process；The excited vibration stress mornitoring module detects work
Exciting dynamic stress in part ageing process；The high-frequency excitation processing module includes that card occurs for random waveform, power is put
Big device and high-frequency vibration exciter；The plastic deformation detection module includes acoustic emission sensor, acoustic emission signal amplifier sum number
According to capture card；The excited vibration stress mornitoring module includes strain transducer and dynamic strain indicator；The master system
It is obtained including residual stress memory module, finite element analysis module, strain peak value special with dynamic stress conversion module, acoustic emission signal
Sign obtains module and technological parameter setup module.
Further, the size and distribution of residual stress memory module storage workpiece surface residual stress；
The residual stress size and distribution can be obtained using finite element numerical simulation technology, can also use experiment side
Method test obtains；The experimental method includes orifice method and X-ray diffraction method.
Further, the sound emission signal characteristic obtains module and extracts the collected acoustic emission signal of data collecting card
Characteristic value；The eigenvalue of the acoustic emission signal is RMS voltage (RMS).
Further, the strain peak value, which is obtained, extracts the collected strain wave of dynamic strain indicator with dynamic stress conversion module
The peak value of shape, and the elastic modulus E (GPa) of workpiece is preset in the acquisition of strain peak value and dynamic stress conversion module；Institute
Transformational relation between the exciting dynamic stress stated and the strain peak value isWherein σ answers for excited vibration
Power.
Further, the master system is connect with the input terminal that the random waveform is blocked；Described is any
The output end of waveform card is connect with the input terminal of the power amplifier；The output end of the power amplifier and institute
The input terminal for the high-frequency vibration exciter stated connects；The master system control random waveform generation card generation is sinusoidal to swash
Shake signal；After the sine excitation signal amplifies via power amplifier, the high-frequency vibration exciter is driven to generate high frequency vibrating
It is dynamic；The acoustic emission sensor installation is on the surface of the workpiece；The output end of the acoustic emission sensor and the sound are sent out
Penetrate the input terminal connection of signal amplifier；The output end of the acoustic emission signal amplifier is defeated with the data collecting card
Enter end connection；The output end of the data collecting card is connect with the master system；The excited vibration stress mornitoring
Module includes strain transducer and dynamic strain indicator；The strain transducer is pasted on the workpiece surface；Described
The output end of strain transducer is connect with the input terminal of the dynamic strain indicator；The output end of the dynamic strain indicator and institute
The master system connection stated.
Further, the high-frequency vibration exciter is electromagnetic actuator.
The high-frequency vibration aging technique parameter determination system determines technological parameter, and steps are as follows:
(1) vibration shape is strained using each rank that the modal analysis method in the finite element analysis module obtains workpiece, obtained
Region where straining vibration shape large strain to each rank；Choose the region where straining vibration shape large strain and the larger remnants of workpiece
The preferred vibration shape of the consistent strain vibration shape in region as high-frequency vibration ageing treatment where stress；The preferred vibration shape institute is right
The frequency answered is preferred excited frequency fi(i=1,2 ..., N, wherein N is positive integer), and preferred excited frequency fiDescribed
High-frequency vibration exciter operating frequency range in；
(2) use the harmonic responding analysis method in the finite element analysis module in the subresonance of preferred excited frequency
Harmonic responding analysis is carried out to workpiece in frequency range, obtains different excited frequencies, exciting dynamic stress, exciting time and pretightning force
Workpiece stress distribution under effect, primarily determines the range of choice of high-frequency vibration aging technique parameter on this basis, and
It stores in the technological parameter setup module；The pretightning force refers to the high-frequency vibration exciter moving component surface
Contact force between workpiece surface；The pretightning force is too small, and the energy of high-frequency vibration exciter is caused not to be injected into effectively
Material internal, the pretightning force is excessive, causes high-frequency vibration exciter that can not generate effective high-frequency vibration, in both circumstances
It will cause workpiece after high-frequency vibration ageing treatment, ideal timeliness effect can not be obtained；
(3) different technical parameters are carried out to workpiece and acts on lower high-frequency vibration ageing treatment, extract the sound emission of acquisition back
The characteristic value of signal, while test obtains the residual stress relief ratio of workpiece, and sound emission letter is obtained by way of curve matching
Number characteristic value and residual stress relief ratio between functional relation, when residual stress relief ratio reaches 50%, record correspond to
Acoustic emission signal characteristic value, and be set to the threshold limit value of sound emission signal characteristic value.For specific Threshold extent
The setting of value can also need effect to be achieved to be determined according to experiment；
(4) based on the range of choice of the high-frequency vibration aging technique parameter primarily determined, carry out high-frequency vibration timeliness
Experimental study；The acoustic emission signal under different technical parameters effect is acquired, its characteristic value is extracted, when the sound that the extraction obtains
When emitting signal characteristic value more than its threshold limit value, the technological parameter of high-frequency vibration ageing treatment at this time is recorded, it is basic herein
The upper preferred high-frequency vibration aging technique parameter selection range of determination, and store into technological parameter setup module.
It is by high-frequency vibration exciter moving component table when carrying out high-frequency vibration ageing treatment to large-size workpiece as shown in Figure 3
Face is directly directly contacted with large-size workpiece local surfaces, then true using high-frequency vibration aging technique parameter proposed by the present invention
Determine system and determine preferred high-frequency vibration aging technique parameter selection range, and large-size workpiece is carried out at high-frequency vibration timeliness
Reason.
Embodiment two
The difference between this embodiment and the first embodiment lies in: small size workpiece is carried out at high-frequency vibration timeliness as shown in Figure 4
It is then to use height proposed by the present invention by the direct clamping of small size workpiece on high-frequency vibration exciter moving component surface when reason
Frequency vibration aging technique parameter determination system determines preferred high-frequency vibration aging technique parameter selection range, and to small size work
Part carries out high-frequency vibration ageing treatment.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (6)
1. a kind of high-frequency vibration aging technique parameter determination system, including high-frequency excitation processing module, plastic deformation detection module,
Excited vibration stress mornitoring module and master system；The high-frequency excitation processing module is detected with the plastic deformation respectively
Module is connected with the excited vibration stress mornitoring module；The plastic deformation detection module and the exciting dynamic stress inspection
Module is surveyed to connect with the master system respectively；The master system and the high-frequency excitation processing module connect
It connects；The master system control high-frequency excitation processing module generates high-frequency vibration；The plastic deformation detection
Module is using the plastic deformation in acoustic emission detection workpiece ageing process；The excited vibration stress mornitoring module inspection
Survey the exciting dynamic stress in workpiece ageing process；The high-frequency excitation processing module includes that card, function occur for random waveform
Rate amplifier and high-frequency vibration exciter；The plastic deformation detection module includes acoustic emission sensor, acoustic emission signal amplifier
And data collecting card；The excited vibration stress mornitoring module includes strain transducer and dynamic strain indicator；The host computer
System includes residual stress memory module, finite element analysis module, strain peak value obtains and dynamic stress conversion module, sound emission are believed
Number feature obtains module and technological parameter setup module.
2. high-frequency vibration aging technique parameter determination system as described in claim 1, it is characterised in that: the host computer system
The input terminal blocked with the random waveform of uniting is connect；The output end and the power that the random waveform is blocked
The input terminal of amplifier connects；The output end of the power amplifier is connect with the input terminal of the high-frequency vibration exciter；Institute
The master system control the stated random waveform occurs card and generates sine excitation signal；The sine excitation signal via
After power amplifier amplification, the high-frequency vibration exciter is driven to generate high-frequency vibration；The acoustic emission sensor is mounted on work
On part surface；The output end of the acoustic emission sensor is connect with the input terminal of the acoustic emission signal amplifier；It is described
The output end of acoustic emission signal amplifier connect with the input terminal of the data collecting card；The data collecting card it is defeated
Outlet is connect with the master system；The excited vibration stress mornitoring module includes strain transducer and dynamic strain
Instrument；The strain transducer is pasted on the workpiece surface；The output end of the strain transducer is moved with described
The input terminal of state deformeter connects；The output end of the dynamic strain indicator is connect with the master system.
3. high-frequency vibration aging technique parameter determination system as described in claim 1, it is characterised in that: the residual stress
The size and distribution of memory module storage workpiece surface residual stress；The strain peak value is obtained to be converted with dynamic stress
Module extracts the peak value of the collected strain waveform of dynamic strain indicator, and the strain peak value obtains and dynamic stress conversion module
In be preset with the elastic modulus E (GPa) of workpiece；The sound emission signal characteristic obtains module extraction data collecting card and collects
Acoustic emission signal characteristic value.
4. high-frequency vibration aging technique parameter determination system as claimed in claim 1 or 2, it is characterised in that: the high frequency
Vibration excitor is electromagnetic actuator.
5. a kind of high-frequency vibration aging technique parameter determination method uses the height as described in claim 1-4 any claim
Frequency vibration aging technique parameter determination system, it is characterised in that the following steps are included:
(1) vibration shape is strained using each rank that the modal analysis method in the finite element analysis module obtains workpiece, obtained each
Rank strains the region where vibration shape large strain；Choose the region where straining vibration shape large strain and the larger residual stress of workpiece
The preferred vibration shape of the consistent strain vibration shape in the region at place as high-frequency vibration ageing treatment；Corresponding to the preferred vibration shape
Frequency is preferred excited frequency fi(i=1,2 ..., N, wherein N is positive integer), and preferred excited frequency fiIn the height
In frequency vibration excitor operating frequency range；
(2) use the harmonic responding analysis method in the finite element analysis module in the subresonance frequency of preferred excited frequency
Harmonic responding analysis is carried out to workpiece in range, obtains different excited frequencies, exciting dynamic stress, exciting time and pretightning force effect
Under workpiece stress distribution, primarily determine the range of choice of high-frequency vibration aging technique parameter on this basis, and store
Into the technological parameter setup module；
(3) different technical parameters are carried out to workpiece and acts on lower high-frequency vibration ageing treatment, extract the acoustic emission signal of acquisition back
Characteristic value, while test obtain the residual stress relief ratio of workpiece, acoustic emission signal is obtained by way of curve matching
Functional relation between characteristic value and residual stress relief ratio records corresponding sound when residual stress relief ratio reaches 50%
Emit the characteristic value of signal, and is set to the threshold limit value of sound emission signal characteristic value；
(4) based on the range of choice of the high-frequency vibration aging technique parameter primarily determined, carry out the experiment of high-frequency vibration timeliness；
If to large-size workpiece carry out high-frequency vibration ageing treatment, be by high-frequency vibration exciter moving component surface directly with large scale work
Part local surfaces directly contact, and are directly to fill small size workpiece if carry out high-frequency vibration ageing treatment to small size workpiece
It is clipped on high-frequency vibration exciter moving component surface；The acoustic emission signal under different technical parameters effect is acquired, its characteristic value is extracted,
When the sound emission signal characteristic value that the extraction obtains is more than its threshold limit value, high-frequency vibration ageing treatment at this time is recorded
Technological parameter, determine preferred high-frequency vibration aging technique parameter selection range on this basis, and store and arrive technological parameter
In setup module.
6. high-frequency vibration aging technique parameter determination method as claimed in claim 5, it is characterised in that: the sound emission letter
Number eigenvalue be RMS voltage.
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| CN110760670A (en) * | 2019-12-03 | 2020-02-07 | 上海海事大学 | Intelligent high-frequency vibration aging system for eliminating residual stress of small-size component |
| CN111024917A (en) * | 2019-12-23 | 2020-04-17 | 北京工业大学 | On-line recovery method for plastic deformation after cyclic loading |
| CN111136946A (en) * | 2020-01-03 | 2020-05-12 | 中国农业大学 | Rebound reduction method for compression forming block of multi-stage rolling straw forming machine |
| CN111783342A (en) * | 2020-07-06 | 2020-10-16 | 上海海事大学 | Method for determining bionic crawling type ultrahigh frequency vibration aging bionic crawling interval |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760670A (en) * | 2019-12-03 | 2020-02-07 | 上海海事大学 | Intelligent high-frequency vibration aging system for eliminating residual stress of small-size component |
| CN111024917A (en) * | 2019-12-23 | 2020-04-17 | 北京工业大学 | On-line recovery method for plastic deformation after cyclic loading |
| CN111136946A (en) * | 2020-01-03 | 2020-05-12 | 中国农业大学 | Rebound reduction method for compression forming block of multi-stage rolling straw forming machine |
| CN111783342A (en) * | 2020-07-06 | 2020-10-16 | 上海海事大学 | Method for determining bionic crawling type ultrahigh frequency vibration aging bionic crawling interval |
| CN111783342B (en) * | 2020-07-06 | 2024-01-30 | 上海海事大学 | Method for determining bionic crawling distance by bionic crawling type ultrahigh-frequency vibration aging |
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