CN106769566A - Shell fragment method for testing fatigue - Google Patents
Shell fragment method for testing fatigue Download PDFInfo
- Publication number
- CN106769566A CN106769566A CN201611141644.8A CN201611141644A CN106769566A CN 106769566 A CN106769566 A CN 106769566A CN 201611141644 A CN201611141644 A CN 201611141644A CN 106769566 A CN106769566 A CN 106769566A
- Authority
- CN
- China
- Prior art keywords
- shell fragment
- tested
- vibration
- test
- tested shell
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of shell fragment method for testing fatigue, the method comprising the steps of：Shell fragment vibrating device drives tested shell fragment to do forced vibration, the time of vibration of the tested shell fragment of record according to the vibration frequency of setting；Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, and otherwise continues to test；If the time of vibration of the tested shell fragment of record is reached during setting value, and tested shell fragment is unbroken, shell fragment is tested by test；Shell fragment is otherwise tested not by test.Shell fragment testing fatigue is carried out by the inventive method, simple to operate, test result is accurate.
Description
Technical field
The present invention relates to shell fragment testing fatigue technical field, more particularly to a kind of shell fragment method for testing fatigue.
Background technology
The critical component that the elastic elements such as spring, shell fragment are commonly used as most industrial products, the good and bad relation of spring-mass
The quality of whole product, shell fragment fatigue strength is an important technology index for weighing shell fragment quality, therefore, to producing
Shell fragment carry out testing fatigue, check the fatigue strength of shell fragment to seem extremely important.
The content of the invention
It is an object of the present invention to provide a kind of shell fragment method for testing fatigue.
In order to realize foregoing invention purpose, following technical scheme is the embodiment of the invention provides：
A kind of shell fragment method for testing fatigue, comprises the following steps：
Shell fragment vibrating device drives tested shell fragment to do forced vibration according to the vibration frequency of setting, during the vibration of the tested shell fragment of record
Between；
Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, and otherwise continues to survey
Examination；
If the time of vibration of the tested shell fragment of record is reached during setting value, and tested shell fragment is unbroken, shell fragment is tested by surveying
Examination；Shell fragment is otherwise tested not by test.
As the shell fragment method for testing fatigue of another implementation, comprise the following steps：
Shell fragment vibrating device drives tested shell fragment to do forced vibration, electricity in record shell fragment vibrating device according to the vibration frequency of setting
The number of revolutions of machine；
Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, and otherwise continues to survey
Examination；
If the number of revolutions of the motor of record is reached during given threshold, and tested shell fragment is unbroken, shell fragment is tested by test；
Shell fragment is otherwise tested not by test.
The shell fragment method for testing fatigue that the present invention is provided, makes tested shell fragment do forced oscillation under the drive of shell fragment vibrating device
It is dynamic, the number of revolutions or tested shell fragment time of vibration of motor in record vibration processes, when motor number of revolutions or tested shell fragment shake
The dynamic time reaches setting value and tested shell fragment is unbroken, then be tested shell fragment by test.This method is simple to operate, and test result is accurate
Really.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as
Restriction to scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the flow chart of method described in first embodiment of the invention.
Fig. 2 is the flow chart of method described in second embodiment of the invention.
Fig. 3 is the structural schematic block diagram of shell fragment fatigue test system in the embodiment of the present invention.
Fig. 4（a）, Fig. 4（b）For the embodiment of the present invention is hit by a bullet the structural representation of plate clamp.
Fig. 5 is the structural representation of rocking bar in the embodiment of the present invention.
Fig. 6 is the structural representation of crank and rocker mechanism in the embodiment of the present invention.
Fig. 7 is the connection diagram of crank and rocker mechanism and connecting seat in the embodiment of the present invention.
Fig. 8 is the structural representation of shell fragment vibrating device in the embodiment of the present invention.
Marked in figure
Rocking bar 1；Connecting rod 2；Crank 3；Vibrating shaft 4；Connecting seat 5；Shell fragment fixture 6；Pedestal 7；Frame 8；Motor 9；Host computer 10；
PLC 20；Shell fragment vibrating device 30；Shell fragment on/off state harvester 40；Displacement transducer 50；Base 101；Annular knurl
Hand the turn of the screw 102；Guide ledges 103；Partition panel 104；Wire 105；Wire pressing plate 106；First electric conductor 107；Second is conductive
Body 108；Pressing plate 109；Bolt 110；Matrix 201；Handler 202；Grip shank 203；Vibration axis hole 204；First lightening hole 205；
Second lightening hole 206；Connecting rod through hole 207；Sample clamping groove 208.
Specific embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged and designed with a variety of configurations herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of selected embodiment of the invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Fig. 1 is referred to, in the first embodiment, shell fragment method for testing fatigue is comprised the following steps：
S11：Shell fragment vibrating device drives tested shell fragment to do forced vibration according to the vibration frequency of setting, and record is tested shaking for shell fragment
The dynamic time.Shell fragment vibrating device includes motor, shell fragment is tested under the drive of motor and does forced oscillation according to the vibration frequency of setting
Dynamic, vibration frequency is the rotating speed of motor.
S12：Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, no
Then continue to test.
In the present embodiment, detect whether tested shell fragment is broken in the following ways：
Tested shell fragment is metal clips, is tested shell fragment and shell fragment vibrating device built-up circuit loop, is connected in the circuit loop
There is level signal collector, the level signal collector collection result is low level when tested shell fragment is broken, and is otherwise gathered
Result is high level.The level signal that level signal collector will be collected is transmitted to PLC, when level signal is low electricity
Usually, then controlled motor is stopped PLC, that is, stop test.
S14：Judge whether the time of vibration of tested shell fragment of record reaches setting value, if the tested shell fragment of record shakes
Tested shell fragment is unbroken when the dynamic time reaches setting value, that is, level signal collection when the time of vibration for being tested shell fragment reaches setting value
Device collects high level, then be tested shell fragment by test；Shell fragment is otherwise tested not by test.
Under normal circumstances, the performance indications for evaluating shell fragment are vibration numbers, and such as vibration number reaches 100,015,000 times
Shell fragment still stands intact afterwards, then illustrate that the shell fragment is functional.Time of vibration is vibration number, quilt with the product of vibration frequency
Tested shell fragment is unbroken when the time of vibration for surveying shell fragment reaches setting value, then illustrate that tested shell fragment is functional, therefore tested bullet
Piece is by test.If conversely, shell fragment is tested before the time of vibration of the tested shell fragment of record reaches setting value being just broken, table
Bright tested shell fragment poor-performing, therefore not by test.
If tested shell fragment can stop test by test, it is not necessary to make tested shell fragment continue to do forced vibration again, because
This, as preferred embodiment, test is stopped when the time of vibration of the tested shell fragment of record reaches setting value.I.e. in we
In method, before the time of vibration of tested shell fragment reaches setting value, test is stopped if tested shell fragment is broken, otherwise continue to survey
Examination, until the time of vibration of tested shell fragment reaches setting value.Therefore under this kind of implementation method, judge whether tested shell fragment passes through
The step of test, can also be processed as：Judge whether tested shell fragment is broken when stopping test, by test if unbroken（It is tested
The time of vibration of shell fragment reaches setting value and tested shell fragment is unbroken）, otherwise not by test（In the time of vibration of tested shell fragment
Shell fragment is tested before reaching setting value to be just broken）.
During forced vibration, the amplitude of tested shell fragment is also a reference for reflecting its performance, accordingly, as one kind
Preferably implementation method, the present embodiment methods described can also include step：
S13：Tested real-time displacement of the shell fragment during forced vibration of measurement, generation displacement oscillogram is shown.
It is readily appreciated that, this step S13 can be before step S12, it is also possible to after step s 12.
Fig. 2 is referred to, in a second embodiment, shell fragment method for testing fatigue is comprised the following steps：
S21：Shell fragment vibrating device drives tested shell fragment to do forced vibration according to the vibration frequency of setting, records shell fragment vibrating device
The number of revolutions of middle motor.Shell fragment vibrating device include motor, under the drive of motor be tested shell fragment according to setting vibration frequently
Rate does forced vibration, and the vibration frequency of tested shell fragment is the rotating speed of motor, and the number of revolutions of motor is shaking for tested shell fragment
Dynamic number of times.
S22：Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, no
Then continue to test.
In the present embodiment, detect whether tested shell fragment is broken in the following ways：
Tested shell fragment is metal clips, is tested shell fragment and shell fragment vibrating device built-up circuit loop, is connected in the circuit loop
There is level signal collector, the level signal collector collection result is low level when tested shell fragment is broken, and is otherwise gathered
Result is high level.The level signal that level signal collector will be collected is transmitted to PLC, when level signal is low electricity
Usually, then controlled motor is stopped PLC, that is, stop test.
S24：Judge whether the number of revolutions of motor in the shell fragment vibrating device of record reaches given threshold, if record
Tested shell fragment is unbroken when the number of revolutions of motor reaches given threshold, i.e. level when the number of revolutions of motor reaches given threshold
Signal picker collects high level, then be tested shell fragment by test；Shell fragment is otherwise tested not by test.
Under normal circumstances, the performance indications for evaluating shell fragment are vibration numbers, and such as vibration number reaches 100,015,000 times
Shell fragment still stands intact afterwards, then illustrate that the shell fragment is functional.The number of revolutions of motor is the vibration number of tested shell fragment,
Tested shell fragment is unbroken when the number of revolutions of motor reaches given threshold, then illustrate that tested shell fragment is functional, therefore tested bullet
Piece is by test.If conversely, shell fragment is tested before the number of revolutions of the motor of record reaches given threshold being just broken, showing
Tested shell fragment poor-performing, therefore not by test.
If tested shell fragment can stop test by test, it is not necessary to make tested shell fragment continue to do forced vibration again, because
This, as preferred embodiment, test is stopped when the number of revolutions of the motor of record reaches given threshold.I.e. in this method
In, before the number of revolutions of motor reaches given threshold, test is stopped if tested shell fragment is broken, otherwise continue to test, directly
Number of revolutions to motor reaches given threshold.Therefore under this kind of implementation method, judge tested shell fragment whether by test
Step can also be processed as：Judge whether tested shell fragment is broken when stopping test, by test if unbroken（The rotation of motor
Number of times reaches given threshold and tested shell fragment is unbroken）, otherwise not by test（Given threshold is reached in the number of revolutions of motor
Shell fragment is tested before to be just broken）.
During forced vibration, the amplitude of tested shell fragment is also a reference for reflecting its performance, accordingly, as one kind
Preferably implementation method, the present embodiment methods described can also include step：
S23：Tested real-time displacement of the shell fragment during forced vibration of measurement, generation displacement oscillogram is shown.
It is readily appreciated that, this step S23 can be before step S22, it is also possible to after step s 22.
The appliance arrangement that the implementation to embodiment of the present invention methods described is relied on below is illustrated.
Fig. 3 is referred to, the shell fragment fatigue test system provided in the present embodiment includes shell fragment vibrating device 30, tested shell fragment
On/off state harvester 40 and switch board, wherein,
Shell fragment vibrating device 30, for driving tested shell fragment to be vibrated according to the vibration frequency of setting.
Tested shell fragment on/off state harvester 40, for detecting on/off state of the tested shell fragment in vibration processes,
And the on/off state data transfer that will be collected controls shell fragment vibrating device to PLC 20 in order to PLC 20
The opening of motor in 30/stop state.
Switch board includes control display panel and PLC 20, and PLC 20 is used to control shell fragment vibrating device 30
In motor open/stop state and rotating speed, and record motor rotating speed, motor number of revolutions；Control display panel is used to carry out
Parameter setting and status display, for example, set the rotary speed parameter of motor, for example, the work of motor is shown by indicator lamp（Open/stop）
State.
Motor work by motor controller controls, therefore PLC 20 by the control to electric machine controller realizing
When the control of motor, such as motor are opened or are stopped, rotating speed such as 30000rpm of motor etc..
The mode that the controlled motor of PLC 20 is stopped can be：When the motor number of revolutions of record reaches setting
Numerical value（Such as 100,015,000 times）When, and the motor number of revolutions of record is not up to setting and numerical value but detects tested bullet
The on/off state of piece is disconnected（It is tested shell fragment fracture）When, controlled motor is stopped.
Motor belt motor spring plate vibrating device 30 is vibrated, and tested shell fragment is arranged on shell fragment vibrating device 30, therefore tested bullet
Piece does the vibration of same speed with shell fragment vibrating device 30, and the rotating speed of motor is the vibration frequency of tested shell fragment, test process
The motor number of revolutions of middle record is the forced vibration number of times of tested shell fragment, is according to tested shell fragment forced vibration number of times data
The performance quality of tested shell fragment can be differentiated.For example, tested shell fragment forced vibration number of times reaches setting numerical value（Such as 100,015,000
It is secondary）When it is still unbroken, then show that the tested shell fragment is functional, by test, otherwise not by test, the tested shell fragment performance
It is poor.That is, the shell fragment fatigue test system that the present embodiment is provided, it is possible to achieve the testing fatigue of shell fragment, and system architecture is simple,
Low cost.
As a kind of citing of embodiment, Fig. 4-8 are referred to, the shell fragment vibrating device 30 in the present embodiment includes tool
There are crank and rocker mechanism, motor 9, frame 8 and multiple shell fragment fixtures 6 of multiple grip shanks 203, motor 9 is arranged in frame 8,
The top of frame 8 is provided with pedestal 7, and pedestal 7 is provided with connecting seat 5, and crank and rocker mechanism is arranged at connecting seat 5, shell fragment fixture 6
Pedestal 7 is arranged at, one end of tested shell fragment is held on shell fragment fixture 6, the other end of tested shell fragment is held on crank and rocker mechanism
Grip shank 203, crank and rocker mechanism is used to drive tested shell fragment to do of reciprocating vibration under the driving of motor.
Refer to Fig. 4（a）, Fig. 4（b）, used as a kind of specific embodiment, in the present embodiment, shell fragment fixture includes
Base 101, in the present embodiment, base 101 is rectangular structure, and annular knurl hand the turn of the screw 102, Spring sheet clip are provided with base 101
Tool is connected on connection pedestal by annular knurl hand the turn of the screw 102.One side of base 101 is provided with the first electric conductor 107, the
One electric conductor 107 is used to carry tested shell fragment, that is, be tested shell fragment and be positioned on the first electric conductor 107.The one of first electric conductor 107
End is connected with the second electric conductor 108, and the second electric conductor 108 is fixed on base 101 by conductive fastener.First
The other end of electric conductor 107 is provided with pressing plate 109, and pressing plate 109 is used to protect the tested shell fragment being positioned on the first electric conductor 107
Hold clamp position, i.e. after tested shell fragment is positioned on the first electric conductor 107, compressed tested shell fragment with pressing plate 109.Second leads
Guide ledges 103 are provided between electric body 108 and pressing plate 109.Another side of base 101 is provided with wire 105, wire
105 one end is connected with fastener.In the present embodiment, as a kind of citing of embodiment, the electric conductor of wire 105 and second
108 two relative sides for being located at base 101 respectively, as shown in the figure.
In the present embodiment, on the one hand fastener will have electric action so that wire 105 is led with second in the energized state
The electrical communication of electric body 108, and then the second electric conductor 108 and the electrical communication of the first electric conductor 107 are caused, and then cause tested shell fragment
With the electrical communication of wire 105；Another aspect fastener will also have fastening effect so that the second electric conductor 108 can be with base
101 keep being fastenedly connected.Accordingly, as a kind of preferably implementation method, fastener uses the bolt 110 that metal material makes,
The afterbody of bolt 110 is connected with wire 105.Used as a kind of citing of embodiment, the first electric conductor 107 is copper sheet, second
Electric conductor 108 is steel disc.
In the present embodiment, pressing plate 109 passes through screw（Or bolt）It is connected with base 101, when tested shell fragment is installed, unscrews spiral shell
Nail, the gap insertion that tested shell fragment is formed between pressing plate 109 and base 101, in the guide effect of guide ledges 103
Under, tested shell fragment is taken advantage of a situation and is placed on the first electric conductor 107, and is connected with the contact of the second electric conductor 108, finally tightens screw.Survey
When tested shell fragment is removed after the completion of examination, unscrew screw, tested shell fragment is taken advantage of a situation and is removed from the first electric conductor 107.Lead
Not only there is guide effect to tested shell fragment to boss 103, tested shell fragment is easily installed, while tested bullet can also be prevented effectively
Piece deviation position in detection process.
Used as a kind of more excellent implementation method, the side for being provided with wire 105 of base 101 is additionally provided with wire pressing plate
106, wire pressing plate 106 is used to make the other end of wire 105 be close to base 101.As shown in figure 1, one end of wire 105 and spiral shell
The afterbody connection of bolt 110, and base 101 is fixed on, the other end of wire 105 is located between wire pressing plate 106 and base 101,
Turn screw and shorten the distance between wire pressing plate 106 and base 101, until wire 105 is close to base 101.So set,
On the one hand the wire 105 in unloading process can be prevented to be pulled off, wire 105 on the other hand can also be made smooth attractive in appearance.
Define the 107, pressing plate 109, of the second electric conductor 108, wire 105 composition one of first electric conductor
Individual clamp assemblies, such as Fig. 2（b）Shown, the shell fragment fixture shown in figure includes two clamp assemblies, two the first electric conductors 107
Between separated by partition panel 104, i.e., separated by partition panel 104 between two clamp assemblies.One test suite can be used
In a testing fatigue for tested shell fragment, therefore, the shell fragment fixture shown in figure can simultaneously be tested for two tested shell fragments and made
With.Ground is readily appreciated that, the size according to base 101 is set, and two and above clamp assemblies can also be set on base 101, with
It is easy to the tested shell fragment test simultaneously of two and the above, naturally, a clamp assemblies can also be only set on base 101.
Fig. 5-6 are referred to, used as a kind of specific embodiment, in the present embodiment, crank and rocker mechanism includes crank
3rd, rocking bar 1 and connecting rod 2.Wherein, rocking bar 1 includes matrix 201 and handler 202, and handler 202 is connected to the edge of matrix 201,
The edge of matrix 201 is also associated with multiple grip shanks 203, and the bottom of grip shank 203 is connected with matrix 201, and top is provided with sample
Product holding tank 208 a, top for grip shank 203 can set one and more than one sample clamping groove 208, matrix 201
The vibration axis hole 204 for connecting vibrating shaft is provided with, handler 202 is provided with the connecting rod through hole 207 for connecting connecting rod, even
The distance of rod through-hole 207 to vibration axis hole 204 is equal with the distance of top to the vibration axis hole 204 of grip shank 203.Connecting rod 2
Two ends are respectively arranged with bearing hole, constitute figure of eight structure, and connecting rod 2 passes through the bearing and rocking bar 1, song of embedded bearing hole
Handle 3 is connected, and specifically, rocking bar 1 is connected by the bearing through connecting rod through hole 207, bearing hole with connecting rod 2, and connecting rod 2 is by passing through
Wear the bearing connecting crank 3 of another bearing hole.
To ensure the intensity of crank and rocker mechanism, in the present embodiment, preferably the length of crank expires with the length of the rocking bar
Sufficient relationWherein, Ψ is oscillating angle, L1It is crank length, L3It is rocking bar length.
Tested shell fragment is metal clips, and one end of tested shell fragment is held on the first electric conductor 107 of shell fragment fixture, and with
The contact connection of second electric conductor 108, the second electric conductor is connected by metal bolts with one end of wire, the other end of wire and company
Connect pedestal built-up circuit loop.In the present embodiment, shell fragment on/off state harvester 40 is level signal collector, level letter
Number collector is series in circuit loop high, and when tested shell fragment is intact, circuit loop is unimpeded, level signal collector collection knot
Fruit is high level, can be represented with " 1 ", and when tested shell fragment is broken, circuit loop disconnects, level signal collector collection result
It is low level, can be represented with " 0 ".
To mitigate the weight of rocking bar, as illustrated, in the present embodiment, multiple first lightening holes are provided with matrix 201
205, used as a kind of implementation method, the first lightening hole 205 is circular port, and matrix 201 is uniformly distributed in around vibration axis hole 204
On.
In order to further mitigate rocking bar weight, more preferably, the second lightening hole 206, the present embodiment are provided with handler 202
In, the second lightening hole 206 is the rectangular opening of rounding, and rectangle hole area is big, can preferably mitigate rocking bar weight, and rectangular opening falls
Fillet so that rocking bar is more attractive.
As illustrated, in the present embodiment, matrix 201 is disc-shaped structure, so setting can effectively improve its intrinsic frequency
Rate, makes it be rotated in the big displacement of 400Hz implemented below 1.4mm.
The rocking bar that the present embodiment is provided, once can at most test eight tested shell fragments, largely lift testing efficiency；
Additionally, test frequency is high, and cycle is short, during amplitude 1.4mm, frequency is up to 450Hz.
Used as a kind of preferred implementation method, matrix 201, handler 202, grip shank 203 are integrally formed, and fine by carbon
Dimension plate cutting is formed.Rocking bar is made by carbon fiber board, on the one hand can further mitigate rocking bar quality, on the other hand can also be increased
Strong its intensity.Rocking bar is integrally formed, and is not only convenient for making, and can improve the overall stability of rocking bar.
Vibrating shaft 4 is the direct drive mechanism for realizing shell fragment compression, vibrating shaft 4 by the vibration axis hole on rocking bar 1 with shake
Bar 1 is connected.In the present embodiment, vibrating shaft 4 uses 40Cr steel makings, rocking bar 1 to be manufactured using carbon fibre materials, total design
Rotary inertia value be 4.26 × 10-7kg·m2。
Inertia force can be produced in crank and rocker mechanism motion process, so that the dynamic property of whole mechanism is influenceed, therefore,
Connecting rod 2 is on the premise of force request is met, it is desirable to which its quality is as far as possible small.Additionally, the mass of connecting rod 2 is smaller, more contribute to whole
The balance mass distribution of mechanism.Therefore, in the present embodiment, the length of connecting rod 2 is 19mm, and quality is 0.32g, what it can bear
Maximum stress is 2.077 × 1106N/m2, and yield limit is 9.3 × 106N/m2, therefore safety coefficient：n1 =9.3×106/
2.077×106=4.78, can well meet larger rigidity and strength demand.
In the present embodiment, crank 3 makes solid axle construction using conventional steel alloy 40Cr materials, and conditioned treatment,
Its tensile strength sigma b >=750MPa, yield point σ s >=550MPa, fatigue limit for torsion τ -1 >=200 MPa, bending fatigue limit σ -
1≥350 MPa.40Cr is one of most popular steel grade, after conditioned treatment, with good comprehensive mechanical property, low
Warm impact toughness and low notch sensitivity, quenching degree are good, can obtain fatigue strength higher.Song described in the present embodiment
1.117 × 107N/m2 of maximum stress that handle can bear.Bending fatigue limit σ -1 >=the 350MPa of 40Cr, therefore safety coefficient
S = 3.50×108 / 1.117×107= 31.3.Generally, when uniform in material, load and accurate Stress calculation, S is taken
= 1.3~1.5；Material is not uniform enough, when calculating not accurate enough, S=1.5 ~ 1.8.Therefore crank described in the present embodiment can be with
Meet intensity requirement applications higher.
In the present embodiment, crank and rocker mechanism is arranged on connecting seat 5, is provided with what is passed through for crank 3 on connecting seat 5
Hole, crank 3 is connected after passing through connecting seat 5 with the rotating shaft of motor 9.Motor is rotated and drives crank to rotate, the drivening rod 2 of crank 3, even
Bar 2 drives rocking bar 1, realizes that the handler 20 of the reciprocally swinging of rocking bar 1, i.e. rocking bar 1 swings, and then also drives grip shank 30 to put
It is dynamic, that is, drive sample to swing, handler 20 is equal with displacement with the pendulum angle of grip shank 30.
In the present embodiment, the quantity 6 of shell fragment fixture is equal with the quantity of grip shank in crank and rocker mechanism 203, Spring sheet clip
Tool 6 is arranged at pedestal 7 by annular knurl hand the turn of the screw 102, and a shell fragment fixture 6 corresponds to a grip shank, is tested the one of shell fragment
End is held in the holding tank 208 on the top of grip shank 203, and the other end is held on first electric conductor 107 and pressing plate of shell fragment fixture 6
Between 109.Electric connection socket is provided with pedestal 7, wire 105 is connected with electric connection socket, after energization be tested shell fragment, shell fragment fixture,
Pedestal built-up circuit loop, in the circuit loop, circuit loop disconnects if tested shell fragment is broken, if tested shell fragment is intact
Circuit loop is unimpeded, can be sentenced by the break-make of circuit loop and know whether tested shell fragment is broken.
Fig. 3 is referred to, as a kind of more excellent implementation method, displacement transducer can also be included in shell fragment test system
50, displacement transducer 50 can use eddy current displacement sensor, eddy current displacement sensor to be installed on connection pedestal, static shape
One end of current vortex sensor and tested shell fragment under state（Or a fixing point of setting）Alignment, eddy current displacement sensor is used for
Tested real-time displacement amount of the shell fragment in vibration processes of measurement, the real-time displacement of tested shell fragment is the amplitude of tested shell fragment.It is real
Now, blade is provided with connection pedestal, steel bushing, blade outboard and steel bushing outboard alignment is installed on blade；During installation, current vortex
Displacement transducer header planes are right on the outside of sensor head outer edge and steel bushing and apart from 0.4mm parallel to steel bushing plane
Together.
Displacement transducer 50 can be connected with switch board, and the displacement data that will be detected is transmitted to switch board, switch board
Displacement oscillogram of the tested shell fragment in vibration processes can be in real time shown on control display panel.
As more excellent implementation method, host computer 10 can also be included in shell fragment fatigue test system, host computer 10 can be with
It is the equipment such as computer, palm PC, smart mobile phone.Host computer 10 communicates with PLC 20, in reading PLC 20
Whether the motor number of revolutions data for recording and storing, judge tested shell fragment by test, example according to motor number of revolutions data
If the motor number of revolutions data of record are more than or equal to setting numerical value, then by test, show that tested shell fragment is functional, otherwise
Not by test, the tested shell fragment can be considered as substandard products treatment.
Because motor 9 with the vibration at high speed of spring plate vibrating device 30, and then will be realized driving tested shell fragment vibration at high speed, because
The temperature of this motor 9 is easy to raise, and motor 9 works and easily trigger failure and influence its life-span at too high a temperature.Therefore,
In the present embodiment, as a kind of more excellent implementation method, in shell fragment fatigue test system, also including air compressor, air pressure
Contracting machine is arranged at motor by breather pipe, the temperature for reducing motor, to ensure motor normal work, extends its life-span.
In the present embodiment, shell fragment vibrating device 30 is multiple, and PLC 20 is controlled in each shell fragment vibrating device 30
Motor is according to identical rotational speed.The benefit that shell fragment vibrating device 30 is set to multiple is once to be available for multiple tested shell fragments
Test, and multiple shell fragment vibrating devices 30 according to identical rotational speed, i.e., multiple tested shell fragments have identical displacement, therefore
Displacement can be gathered using only a displacement transducer 50, it is cost-effective.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (8)
1. a kind of shell fragment method for testing fatigue, it is characterised in that comprise the following steps：
Shell fragment vibrating device drives tested shell fragment to do forced vibration according to the vibration frequency of setting, during the vibration of the tested shell fragment of record
Between；
Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, and otherwise continues to survey
Examination；
If the time of vibration of the tested shell fragment of record is reached during setting value, and tested shell fragment is unbroken, shell fragment is tested by surveying
Examination；Shell fragment is otherwise tested not by test.
2. method according to claim 1, it is characterised in that methods described also includes step：When the tested shell fragment of record
Time of vibration stop test when reaching setting value.
3. method according to claim 1, it is characterised in that the tested shell fragment of the detection during forced vibration whether
Fracture, including：
Tested shell fragment is metal clips, is tested shell fragment and shell fragment vibrating device built-up circuit loop, is connected in the circuit loop
There is level signal collector, the level signal collector collection result is low level when tested shell fragment is broken, and is otherwise gathered
Result is high level.
4. method according to claim 1, it is characterised in that methods described also includes step：The tested shell fragment of measurement is being received
Compel the real-time displacement in vibration processes, generation displacement oscillogram is shown.
5. a kind of shell fragment method for testing fatigue, it is characterised in that comprise the following steps：
Shell fragment vibrating device drives tested shell fragment to do forced vibration, electricity in record shell fragment vibrating device according to the vibration frequency of setting
The number of revolutions of machine；
Whether the tested shell fragment of detection is broken during forced vibration, and test is stopped when tested shell fragment is broken, and otherwise continues to survey
Examination；
If the number of revolutions of the motor of record is reached during given threshold, and tested shell fragment is unbroken, shell fragment is tested by test；
Shell fragment is otherwise tested not by test.
6. method according to claim 5, it is characterised in that methods described also includes step：When the rotation of the motor of record
Turn to close motor when number of times reaches given threshold, stop test.
7. method according to claim 5, it is characterised in that the tested shell fragment of the detection during forced vibration whether
Fracture, including：
Tested shell fragment is metal clips, is tested shell fragment and shell fragment vibrating device built-up circuit loop, is connected in the circuit loop
There is level signal collector, the level signal collector collection result is low level when tested shell fragment is broken, and is otherwise gathered
Result is high level.
8. method according to claim 5, it is characterised in that methods described also includes step：The tested shell fragment of measurement is being received
Compel the real-time displacement in vibration processes, generation displacement oscillogram is shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141644.8A CN106769566B (en) | 2016-12-12 | 2016-12-12 | Elastic slice method for testing fatigue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141644.8A CN106769566B (en) | 2016-12-12 | 2016-12-12 | Elastic slice method for testing fatigue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106769566A true CN106769566A (en) | 2017-05-31 |
| CN106769566B CN106769566B (en) | 2019-04-09 |
Family
ID=58880501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611141644.8A Active CN106769566B (en) | 2016-12-12 | 2016-12-12 | Elastic slice method for testing fatigue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106769566B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051297A (en) * | 2017-11-28 | 2018-05-18 | 吴浪 | A kind of mechanical metal clips fatigue strength test apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101118203A (en) * | 2007-08-24 | 2008-02-06 | 武汉理工大学 | Test method of sample destroy time in tube of glass fibre reinforced plastic long-term performance test |
| CN102109406A (en) * | 2011-01-06 | 2011-06-29 | 山东力诺新材料有限公司 | Vibration test method for heat-collecting tube |
| CN103969114A (en) * | 2014-04-15 | 2014-08-06 | 昆明理工大学 | Fatigue testing device of honeycomb panel and testing method |
| CN105334121A (en) * | 2014-08-13 | 2016-02-17 | 中国科学院声学研究所 | Material fatigue strength testing device and testing method |
-
2016
- 2016-12-12 CN CN201611141644.8A patent/CN106769566B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101118203A (en) * | 2007-08-24 | 2008-02-06 | 武汉理工大学 | Test method of sample destroy time in tube of glass fibre reinforced plastic long-term performance test |
| CN102109406A (en) * | 2011-01-06 | 2011-06-29 | 山东力诺新材料有限公司 | Vibration test method for heat-collecting tube |
| CN103969114A (en) * | 2014-04-15 | 2014-08-06 | 昆明理工大学 | Fatigue testing device of honeycomb panel and testing method |
| CN105334121A (en) * | 2014-08-13 | 2016-02-17 | 中国科学院声学研究所 | Material fatigue strength testing device and testing method |
Non-Patent Citations (1)
| Title |
|---|
| 宗景瑞: "《家电产品的开发与设计》", 31 August 1993, 北京理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051297A (en) * | 2017-11-28 | 2018-05-18 | 吴浪 | A kind of mechanical metal clips fatigue strength test apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106769566B (en) | 2019-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103076246B (en) | Double-shaft high-low cycle complex fatigue tester | |
| CN105372067B (en) | Crankshaft torsion fatigue experimental device | |
| EP2503317B1 (en) | Device for fatigue testing a specimen | |
| CN105928676A (en) | Vibration testing device of damping mistuning blade-turbine disk with damping block structure | |
| CN106441754B (en) | Shrapnel fatigue test system | |
| US20190331645A1 (en) | Ultrasonic cutter detection method and device | |
| CN102004030A (en) | Vibration measuring test bed for vibration absorber | |
| CN206248304U (en) | Shell fragment fatigue test system | |
| CN106769566A (en) | Shell fragment method for testing fatigue | |
| CN209485644U (en) | A kind of bolt group connection vibration reliability experimental provision | |
| CN108318202A (en) | Damper wind excited vibration analogue test platform | |
| CN102792143A (en) | Transverse load apparatus | |
| CN109580160A (en) | A kind of plane cascade experimental provision | |
| CN102353537B (en) | Flexural fatigue testing machine for multi-throw crank shaft | |
| CN202362199U (en) | Component fatigue strength testing device | |
| CN105372066B (en) | A kind of torsion fatigue test of whole crank shaft method | |
| CN106676238B (en) | A kind of Transit Equipment band large-scale metal component vibration stress relief treatment method | |
| CN208443507U (en) | A kind of heavy duty clutch moment of torque test device | |
| CN101457749B (en) | Fan testing device | |
| CN2687657Y (en) | Spring fatigue testing machine | |
| CN216525265U (en) | Fatigue test system with temperature control | |
| CN115078065A (en) | Device and method for testing reliability of wire bonding point | |
| CN201373797Y (en) | Posture adjusting mechanism of drop test machine | |
| CN104749522B (en) | Motor life test fixture | |
| CN209416642U (en) | A kind of plane cascade experimental provision |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Elastic sheet fatigue test method Effective date of registration: 20200408 Granted publication date: 20190409 Pledgee: Bank of Chengdu science and technology branch of Limited by Share Ltd. Pledgor: CHENGDU JIANGYE OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2020510000024 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230320 Granted publication date: 20190409 Pledgee: Bank of Chengdu science and technology branch of Limited by Share Ltd. Pledgor: CHENGDU JIANGYE OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2020510000024 |