CN109338092A - A kind of undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform - Google Patents
A kind of undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform Download PDFInfo
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Abstract
Undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform, the process for machining and manufacturing including determining sample, prepares the sample with initial residual stress；Determine the surface residual stress distribution of sample；Build intelligent vibration timeliness platform；Primarily determine the technological parameter of vibration stress relief treatment；Determine the technological parameter of vibration stress relief treatment；Vibration stress relief treatment is carried out to sample；Effect of vibration stress relief evaluation.Subjects of mechanical engineering undergraduate is trained using a kind of undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform proposed by the present invention, undergraduate can be cultivated to encounter problems problem-solving ability, to achieve the purpose that cultivate undergraduate's innovative thinking.
Description
Technical field
The present invention relates to educational method fields, refer in particular to a kind of undergraduate's innovative thinking training based on intelligent vibration timeliness platform
The method of supporting is particularly suitable for the innovative thinking of culture subjects of mechanical engineering undergraduate.
Technical background
Mechanical engineering material, manufacturing technology basis etc. are related to material and the course of process for machining and manufacturing belongs to mechanical engineering
The Main Course of section, can be to subjects of mechanical engineering undergraduate tells about material residual stress, destressing is moved back inside these courses
Fire process, welding procedure and welding residual stress, casting technique and casting residual stress, Cutting Process and cutting residual stress etc.
The knowledge of aspect, however the residual stress distribution state after the measuring technology of residual stress, the manufacture of component actual processing is obtained
Take method and advanced residual stress to eliminate technique not refer to, however subjects of mechanical engineering undergraduate's future obtain employment or
It will necessarily be related to the above problem when formulating material process for machining and manufacturing when carrying on more advanced studies.In addition, by carrying out residual stress
The instruction of process aspect is eliminated in the acquisition of residual stress distribution state, advanced residual stress after test, the manufacture of component actual processing
Practice, the innovative thinking of subjects of mechanical engineering undergraduate, the interest of excitation student's study, for following employment or depth can be cultivated
It makes and lays a solid foundation.In conclusion in order to cultivate the innovative thinking of undergraduate, the present invention proposes a kind of based on intelligent vibration
Undergraduate's innovative thinking cultural method of timeliness platform is particularly suitable for the innovative thinking of culture subjects of mechanical engineering undergraduate.
Summary of the invention
In order to cultivate the innovative thinking of undergraduate, the present invention proposes a kind of undergraduate's wound based on intelligent vibration timeliness platform
New thinking cultural method is particularly suitable for the innovative thinking of culture subjects of mechanical engineering undergraduate.
To achieve the above object, the invention provides the following technical scheme:
Undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform, comprising the following steps:
(1), it determines the process for machining and manufacturing of sample, prepares the sample with initial residual stress；
(2), the surface residual stress distribution of sample is determined；
(3), intelligent vibration timeliness platform is built；
(4), the technological parameter of vibration stress relief treatment is primarily determined；
(5), the technological parameter of vibration stress relief treatment is determined；
(6), vibration stress relief treatment is carried out to sample；
(7), effect of vibration stress relief is evaluated.
The process for machining and manufacturing that sample is determined in step (1), prepares the sample with initial residual stress, and feature exists
In: a kind of theoretical knowledge that process for machining and manufacturing is processed sample, and gets in conjunction with course learning is chosen, is determined
The surface residual stress property of sample；The residual stress property includes residual tension and residual compressive stress.
Specific implementation details are as follows: mechanical engineering material, manufacturing technology basis etc. are related to material and process for machining and manufacturing
It can be lectured to undergraduate to process for machining and manufacturing such as heat treatment, casting, forging, welding, cuttings in course, and each processing system
Making technique all can make component generate residual stress.It chooses a kind of process for machining and manufacturing to be processed sample, and combines class
Journey learns the theoretical knowledge got, determines the surface residual stress property of sample.The residual stress property includes remnants
Tensile stress and residual compressive stress.
The surface residual stress distribution of sample is determined in step (2), it is characterised in that: use finite element numerical simulation
Software establishes the three-dimensional finite element model of sample, simulates the actual processing manufacturing process of sample；Determine that the surface residual of sample is answered
Power property；Obtain the surface residual stress distribution of sample；Determine the peak value residual stress position that sunykatuib analysis obtains；
It tests to obtain the residual stress numerical value of peak value residual stress position using residual stress test method；The residual stress
Test method is orifice method residual stress test method；The finite element numerical simulation software is ANSYS finite element software.
Specific implementation details: in order to determine the technological parameter and assessment vibration aging on eliminating remnants when vibration stress relief treatment
The effect of stress, it must be determined that the surface residual stress distribution of sample and obtain the specific value of residual stress.If
The surface residual stress distribution for obtaining sample using residual stress test method is not only costly, but also time-consuming, and adopts
Actual processing and manufacturing process is simulated with the method for finite element numerical simulation, the surface residual stress distribution shape of sample can be obtained
State, while each rank strain vibration shape of component can be obtained, determine the region where each rank strain vibration shape large strain；Choose strain
Strain vibration shape when region where vibration shape large strain is consistent with the region where larger residual stress, at oscillating aging
Effective vibration shape when reason, can obtain the effect of ideal Relieving Residual Stress in Libration.In addition, using finite element number
The method of value simulation obtains the surface residual stress distribution of sample, can reduce cost, improves efficiency.
Intelligent vibration timeliness platform is built in step (3), it is characterised in that: the intelligent vibration timeliness platform, including
Master system, signal generator, driver, vibration excitor, strain transducer, dynamic strain indicator, acceleration transducer, charge are put
Big device, oscillograph, data collecting card, support device；Vibration excitor is fixed on specimen surface, and sample is filled using flexible support
It sets and is supported；Master system control signal generator output amplitude and frequency independence and continuously adjustable sine excitation letter
Number；The sine excitation signal of signal generator output is input to vibration excitor via driver, and driving vibration excitor generates vibration；Accelerate
Degree sensor is mounted on sample, and the output end of acceleration transducer and the input terminal of charge amplifier connect, charge amplifier
Output end and the input terminal of oscillograph connect, the input terminal of the output end of oscillograph and data collecting card connects；Strain sensing
Device is pasted on sample, and the input terminal of the lead-out wire of strain transducer and dynamic strain indicator connects, the output of dynamic strain indicator
End is connect with the input terminal of data collecting card；The output end of data collecting card is connect with master system.
It when intelligent vibration timeliness platform carries out vibration stress relief treatment to sample, is controlled by master system, it can
Mitigate the workload of operator, improves the intelligent level of working efficiency and oscillating aging platform.
The technological parameter of vibration stress relief treatment is primarily determined in step (4), it is characterised in that: soft using ANSYS finite element
Part carries out numerical value model analysis to sample, obtains each rank strain vibration shape and intrinsic frequency of sample；It is obtained according to numerical simulation analysis
The specimen surface residual stress distribution state arrived, determines the region where the larger residual stress of sample；According to numerical value model analysis
Each rank of obtained sample strains the vibration shape, determines the region where each rank strain vibration shape large strain；Choosing strain, the vibration shape is larger answers
Strain vibration shape when region where becoming is consistent with the region where larger residual stress is effective when as vibration stress relief treatment
The vibration shape, reference frequency when the corresponding intrinsic frequency of the strain vibration shape is as frequency sweep processing, and it is denoted as fr(Hz)；Determine sample
Position where vibration peak and vibration nodal point；Vibration excitor is fixed at the vibration peak position of sample；In the vibration of sample
Sample is supported using flexible support device at node, so that vibration excitor carries out exciting to sample；By acceleration
Sensor is mounted on the region where the larger residual stress of sample；Strain transducer is pasted onto where the larger residual stress of sample
Region.
The technological parameter of vibration stress relief treatment is determined in step (5), specific implementation details: based on reference frequency,
Frequency sweep vibration is carried out to sample, obtains the excited frequency of vibration stress relief treatment；Using vibration aging technology national standard, vibration is determined
The exciting dynamic stress of dynamic ageing treatment and exciting time.
Vibration stress relief treatment is carried out to sample in step (6), specific implementation details: when according to step (5) determining vibration
The technological parameter of processing is imitated, and vibration stress relief treatment is carried out to sample using the intelligent vibration timeliness platform built in step (3).
Effect of vibration stress relief is evaluated in step (7), it is characterised in that: when using the residual stress burst size of sample to vibration
Effect effect is evaluated；The residual stress burst size is | σi-σz|, wherein σiFor the initial residual stress of sample, σzFor examination
Residual stress after sample vibration stress relief treatment；The residual stress burst size shows more greatly Relieving Residual Stress in Libration
Effect is better.
Implementation through the above steps enables to subjects of mechanical engineering undergraduate to grasp material residual stress distribution
Determination method, Relieving Residual Stress in Libration technique, obtain component processing and manufacturing after residual stress distribution state and
Component residual stress distribution state after vibration stress relief treatment, verifying mechanical engineering material, manufacturing technology basis etc. are related to material
The theoretical knowledge that the course of material and process for machining and manufacturing is told about, and carrying out Relieving Residual Stress in Libration technical study
When, it also relates to and builds intelligent vibration timeliness platform, determines Vibration Aging Process parameter, effect of vibration stress relief evaluation etc.
Research work, is capable of that the manipulative ability of exercise student ', encounter problems problem-solving ability.In conclusion by using this hair
A kind of undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform of bright proposition is to subjects of mechanical engineering undergraduate
It is trained, can be improved undergraduate and encounter problems problem-solving ability, and the theory that course is got can be established and known
Know contacting between engineering practice, to excite the interest of undergraduate's autonomous learning, is finally reached culture undergraduate and innovates and think
The purpose of dimension.
Beneficial effects of the present invention are as follows:
1, using a kind of undergraduate's innovative thinking cultural method pair based on intelligent vibration timeliness platform proposed by the present invention
Subjects of mechanical engineering undergraduate is trained, and can cultivate undergraduate and encounter problems problem-solving ability, to reach culture
The purpose of undergraduate's innovative thinking.
2, using a kind of undergraduate's innovative thinking cultural method pair based on intelligent vibration timeliness platform proposed by the present invention
Subjects of mechanical engineering undergraduate is trained, and can establish contacting between the theoretical knowledge and engineering practice that course is got,
To excite the interest of undergraduate's autonomous learning, lay a solid foundation for culture undergraduate's innovative thinking.
Detailed description of the invention
The flow diagram of undergraduate innovative thinking cultural method of the Fig. 1 based on intelligent vibration timeliness platform.
Fig. 2 intelligent vibration timeliness platform schematic diagram.
Specific embodiment
Referring to attached drawing, the present invention is further illustrated:
In order to cultivate the innovative thinking of undergraduate, the present invention proposes a kind of undergraduate's wound based on intelligent vibration timeliness platform
New thinking cultural method is particularly suitable for the innovative thinking of culture subjects of mechanical engineering undergraduate.
To achieve the above object, the invention provides the following technical scheme:
Undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform, comprising the following steps:
(1), it determines the process for machining and manufacturing of sample, prepares the sample with initial residual stress；
(2), the surface residual stress distribution of sample is determined；
(3), intelligent vibration timeliness platform is built；
(4), the technological parameter of vibration stress relief treatment is primarily determined；
(5), the technological parameter of vibration stress relief treatment is determined；
(6), vibration stress relief treatment is carried out to sample；
(7), effect of vibration stress relief is evaluated.
The process for machining and manufacturing that sample is determined in step (1), prepares the sample with initial residual stress, and feature exists
In: a kind of theoretical knowledge that process for machining and manufacturing is processed sample, and gets in conjunction with course learning is chosen, is determined
The surface residual stress property of sample；The residual stress property includes residual tension and residual compressive stress.
Specific implementation details are as follows: mechanical engineering material, manufacturing technology basis etc. are related to material and process for machining and manufacturing
It can be lectured to undergraduate to process for machining and manufacturing such as heat treatment, casting, forging, welding, cuttings in course, and each processing system
Making technique all can make component generate residual stress.It chooses a kind of process for machining and manufacturing to be processed sample, and combines class
Journey learns the theoretical knowledge got, determines the surface residual stress property of sample.The residual stress property includes remnants
Tensile stress and residual compressive stress.
The surface residual stress distribution of sample is determined in step (2), it is characterised in that: use finite element numerical simulation
Software establishes the three-dimensional finite element model of sample, simulates the actual processing manufacturing process of sample；Determine that the surface residual of sample is answered
Power property；Obtain the surface residual stress distribution of sample；Determine the peak value residual stress position that sunykatuib analysis obtains；
It tests to obtain the residual stress numerical value of peak value residual stress position using residual stress test method；The residual stress
Test method is orifice method residual stress test method；The finite element numerical simulation software is ANSYS finite element software.
Specific implementation details: in order to determine the technological parameter and assessment vibration aging on eliminating remnants when vibration stress relief treatment
The effect of stress, it must be determined that the surface residual stress distribution of sample and obtain the specific value of residual stress.If
The surface residual stress distribution for obtaining sample using residual stress test method is not only costly, but also time-consuming, and adopts
Actual processing and manufacturing process is simulated with the method for finite element numerical simulation, the surface residual stress distribution shape of sample can be obtained
State, while each rank strain vibration shape of component can be obtained, determine the region where each rank strain vibration shape large strain；Choose strain
Strain vibration shape when region where vibration shape large strain is consistent with the region where larger residual stress, at oscillating aging
Effective vibration shape when reason, can obtain the effect of ideal Relieving Residual Stress in Libration.In addition, using finite element number
The method of value simulation obtains the surface residual stress distribution of sample, can reduce cost, improves efficiency.
Intelligent vibration timeliness platform is built in step (3), it is characterised in that: the intelligent vibration timeliness platform, including
Master system, signal generator, driver, vibration excitor, strain transducer, dynamic strain indicator, acceleration transducer, charge are put
Big device, oscillograph, data collecting card, support device；Vibration excitor is fixed on specimen surface, and sample is filled using flexible support
It sets and is supported；Master system control signal generator output amplitude and frequency independence and continuously adjustable sine excitation letter
Number；The sine excitation signal of signal generator output is input to vibration excitor via driver, and driving vibration excitor generates vibration；Accelerate
Degree sensor is mounted on sample, and the output end of acceleration transducer and the input terminal of charge amplifier connect, charge amplifier
Output end and the input terminal of oscillograph connect, the input terminal of the output end of oscillograph and data collecting card connects；Strain sensing
Device is pasted on sample, and the input terminal of the lead-out wire of strain transducer and dynamic strain indicator connects, the output of dynamic strain indicator
End is connect with the input terminal of data collecting card；The output end of data collecting card is connect with master system.
It when intelligent vibration timeliness platform carries out vibration stress relief treatment to sample, is controlled by master system, it can
Mitigate the workload of operator, improves the intelligent level of working efficiency and oscillating aging platform.
The technological parameter of vibration stress relief treatment is primarily determined in step (4), it is characterised in that: soft using ANSYS finite element
Part carries out numerical value model analysis to sample, obtains each rank strain vibration shape and intrinsic frequency of sample；It is obtained according to numerical simulation analysis
The specimen surface residual stress distribution state arrived, determines the region where the larger residual stress of sample；According to numerical value model analysis
Each rank of obtained sample strains the vibration shape, determines the region where each rank strain vibration shape large strain；Choosing strain, the vibration shape is larger answers
Strain vibration shape when region where becoming is consistent with the region where larger residual stress is effective when as vibration stress relief treatment
The vibration shape, reference frequency when the corresponding intrinsic frequency of the strain vibration shape is as frequency sweep processing, and it is denoted as fr(Hz)；Determine sample
Position where vibration peak and vibration nodal point；Vibration excitor is fixed at the vibration peak position of sample；In the vibration of sample
Sample is supported using flexible support device at node, so that vibration excitor carries out exciting to sample；By acceleration
Sensor is mounted on the region where the larger residual stress of sample；Strain transducer is pasted onto where the larger residual stress of sample
Region.
The technological parameter of vibration stress relief treatment is determined in step (5), specific implementation details: based on reference frequency,
Frequency sweep vibration is carried out to sample, obtains the excited frequency of vibration stress relief treatment；Using vibration aging technology national standard, vibration is determined
The exciting dynamic stress of dynamic ageing treatment and exciting time.
Vibration stress relief treatment is carried out to sample in step (6), specific implementation details: when according to step (5) determining vibration
The technological parameter of processing is imitated, and vibration stress relief treatment is carried out to sample using the intelligent vibration timeliness platform built in step (3).
Effect of vibration stress relief is evaluated in step (7), it is characterised in that: when using the residual stress burst size of sample to vibration
Effect effect is evaluated；The residual stress burst size is | σi-σz|, wherein σiFor the initial residual stress of sample, σzFor examination
Residual stress after sample vibration stress relief treatment；The residual stress burst size shows more greatly Relieving Residual Stress in Libration
Effect is better.
Implementation through the above steps enables to subjects of mechanical engineering undergraduate to grasp material residual stress distribution
Determination method, Relieving Residual Stress in Libration technique, obtain component processing and manufacturing after residual stress distribution state and
Component residual stress distribution state after vibration stress relief treatment, verifying mechanical engineering material, manufacturing technology basis etc. are related to material
The theoretical knowledge that the course of material and process for machining and manufacturing is told about, and carrying out Relieving Residual Stress in Libration technical study
When, it also relates to and builds intelligent vibration timeliness platform, determines Vibration Aging Process parameter, effect of vibration stress relief evaluation etc.
Research work, is capable of that the manipulative ability of exercise student ', encounter problems problem-solving ability.In conclusion by using this hair
A kind of undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform of bright proposition is to subjects of mechanical engineering undergraduate
It is trained, can be improved undergraduate and encounter problems problem-solving ability, and the theory that course is got can be established and known
Know contacting between engineering practice, to excite the interest of undergraduate's autonomous learning, is finally reached culture undergraduate and innovates and think
The purpose of dimension.
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. undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform, comprising the following steps:
(1), it determines the process for machining and manufacturing of sample, prepares the sample with initial residual stress；
(2), the surface residual stress distribution of sample is determined；
(3), intelligent vibration timeliness platform is built；
(4), the technological parameter of vibration stress relief treatment is primarily determined；
(5), the technological parameter of vibration stress relief treatment is determined；
(6), vibration stress relief treatment is carried out to sample；
(7), effect of vibration stress relief is evaluated.
2. as described in claim 1 based on undergraduate's innovative thinking cultural method of intelligent vibration timeliness platform, feature exists
In: a kind of theoretical knowledge that process for machining and manufacturing is processed sample, and gets in conjunction with course learning is chosen, is determined
The surface residual stress property of sample；The residual stress property includes residual tension and residual compressive stress.
3. such as undergraduate's innovative thinking cultural method claimed in claims 1-2 based on intelligent vibration timeliness platform, feature
It is: establishes the three-dimensional finite element model of sample using finite element numerical simulation software, the actual processing for simulating sample manufactured
Journey；Determine the surface residual stress property of sample；Obtain the surface residual stress distribution of sample；Determine that sunykatuib analysis obtains
Peak value residual stress position；It tests to obtain the remnants of peak value residual stress position using residual stress test method
Stress numerical；The residual stress test method is orifice method residual stress test method；The finite element numerical simulation is soft
Part is ANSYS finite element software.
4. undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform as described in claim 1-3, feature
It is: the intelligent vibration timeliness platform, including master system, signal generator, driver, vibration excitor, strain sensing
Device, dynamic strain indicator, acceleration transducer, charge amplifier, oscillograph, data collecting card, support device；Vibration excitor is fixed on
Specimen surface, sample are supported using flexible support device；Master system control signal generator output amplitude
The independent and continuously adjustable sine excitation signal with frequency；The sine excitation signal of signal generator output is defeated via driver
Enter to vibration excitor, vibration excitor is driven to generate vibration；Acceleration transducer is mounted on sample, the output end of acceleration transducer with
The input terminal of charge amplifier connects, and the output end of charge amplifier and the input terminal of oscillograph connect, the output end of oscillograph
It is connect with the input terminal of data collecting card；Strain transducer is pasted on sample, and the lead-out wire of strain transducer is answered with dynamic
Become the input terminal connection of instrument, the output end of dynamic strain indicator and the input terminal of data collecting card connect；The output of data collecting card
End is connect with master system.
5. undergraduate's innovative thinking cultural method based on intelligent vibration timeliness platform as described in claim 1-4, feature
It is: numerical value model analysis is carried out to sample using ANSYS finite element software, obtains each rank strain vibration shape and inherently frequency of sample
Rate；The specimen surface residual stress distribution state obtained according to numerical simulation analysis, where determining the larger residual stress of sample
Region；Each rank strain vibration shape of sample obtained according to numerical value model analysis, determines the area where each rank strain vibration shape large strain
Domain；Strain vibration shape when region where choosing strain vibration shape large strain is consistent with the region where larger residual stress, makees
Effective vibration shape when for vibration stress relief treatment, reference frequency when the corresponding intrinsic frequency of the strain vibration shape is as frequency sweep processing,
And it is denoted as fr(Hz)；The vibration peak for determining sample and the position where vibration nodal point；Vibration excitor is fixed on to the vibration of sample
At peak position；Sample is supported using flexible support device at the vibration nodal point of sample, so as to vibration excitor
Exciting is carried out to sample；Acceleration transducer is mounted on to the region where the larger residual stress of sample；Strain transducer is glued
It is attached to the region where the larger residual stress of sample.
6. undergraduate's innovative thinking cultural method as claimed in claims 1-5 based on intelligent vibration timeliness platform, feature
It is: effect of vibration stress relief is evaluated using the residual stress burst size of sample；The residual stress burst size is |
σi-σz|, wherein σiFor the initial residual stress of sample, σzFor the residual stress after sample vibration stress relief treatment；The remnants
Released stress shows that more greatly the effect of Relieving Residual Stress in Libration is better.
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| CN114656286A (en) * | 2022-03-17 | 2022-06-24 | 佛山市东鹏陶瓷发展有限公司 | Method for improving machinability of ceramic rock plate |
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| CN108456772A (en) * | 2018-01-18 | 2018-08-28 | 上海海事大学 | A kind of method of determining ultrasonic vibration aging technique parameter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108456772A (en) * | 2018-01-18 | 2018-08-28 | 上海海事大学 | A kind of method of determining ultrasonic vibration aging technique parameter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656286A (en) * | 2022-03-17 | 2022-06-24 | 佛山市东鹏陶瓷发展有限公司 | Method for improving machinability of ceramic rock plate |
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