CN106323775A - Fatigue test apparatus for performing displacement constraint with spacing mechanism - Google Patents
Fatigue test apparatus for performing displacement constraint with spacing mechanism Download PDFInfo
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- CN106323775A CN106323775A CN201610810530.1A CN201610810530A CN106323775A CN 106323775 A CN106323775 A CN 106323775A CN 201610810530 A CN201610810530 A CN 201610810530A CN 106323775 A CN106323775 A CN 106323775A
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- slide block
- pressurized strut
- proximity switch
- displacement
- experimental device
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- 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
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses a fatigue test apparatus for performing displacement constraint with a spacing mechanism. The fatigue test apparatus comprises an activity execution unit, a displacement limiting unit and a displacement limiting control unit; the activity execution unit is used for driving test pieces required for fatigue test to move reciprocatingly according to control instructions of the displacement limiting unit; the displacement limiting unit is used for limiting displacement of the activity execution unit to enable the test pieces driven through the activity execution unit to move reciprocatingly within in the preset displacement scope and adjusting the displacement scope; the displacement limiting control unit is connected with the activity execution unit and the displacement limiting unit respectively and is used for controlling the activity execution unit to execute preset activity operation. By the arrangement, displacement can be adjusted flexibly and maximumly while fatigue test of the test pieces is performed, the fatigue test apparatus is low in cost, high in flexibility, convenient in use, simple and easy to replace parts and favorable for wide application in production, and great production practice significance is achieved.
Description
Technical field
The present invention relates to fatigue test technology field, particularly relate to a kind of fatigue carrying out displacement constraint with position-limit mechanism
Assay device.
Background technology
Fatigue rupture is when far below under the alternate stress effect of material strength limit, material occurs the phenomenon destroyed.
The major part of aircraft, boats and ships, automobile, dynamic power machine, railway and bridge etc. and component, mostly under the load of circulation change
Frock, fatigue is the failure mode that it is main.Therefore, fatigue test is for designing all kinds of machineries bearing cyclic loading and knot
Structure, becomes important research contents.
At present, fatigue experimental device is to make sample or component bear cycle or the stress of change at random or strain, to measure
Fatigue limit and fatigue life etc. index device.Before product comes into operation, need in the lab to carry out sufficient fatigue
Performance test is examined, and records fatigue limit and the fatigue life of product, thus ensures that product will not go out in actual use
Existing fatigue damage fault.
Electo hydraulic servocontrolled fatigue testing machine is the fatigue experimental device of the most relatively conventional a kind of maturation, and it uses electro-hydraulic watching
Taking closed-loop control system, can carry out test force, deformation, the isoparametric rate controlled of displacement, test operation is convenient, safe and reliable.
But, this testing machine price comparison is expensive, and maintenance cost is the highest, simultaneously because the configuration of equipment is all fixing, because of
This maximum load that can realize, maximum displacement are all changeless, change very inconvenient and relatively costly.
Therefore, at present in the urgent need to developing a kind of fatigue experimental device, it can carry out fatigue test to testpieces
Time, carry out the regulation of maximum displacement flexibly, and cheap, and degree of flexibility is high, easy to use, it is simple to change parts.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism,
It when testpieces is carried out fatigue test, can carry out the regulation of maximum displacement flexibly, and cheap, degree of flexibility
High, easy to use, change parts simple, be conducive to production application widely, be of great practical significance.
To this end, the invention provides a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism, including:
Active execution units, for the control instruction according to spacing control unit, drives and needs to carry out the examination of fatigue test
Test part repeatedly to move；
Position-limiting unit, for limiting the displacement of active execution units so that described restraint performance element institute
The testpieces driven moves back and forth in default displacement range, and can be adjusted displacement range；
Spacing control unit, is connected with active execution units, position-limiting unit respectively, for sending to active execution units
Start control instruction so that active execution units starts to drive testpieces to move in vertical direction, and limit described in real-time judge
Whether the displacement of the testpieces of the detected acquisition of bit location reaches default maximum restraining position or minimum restraining position, if
Reach, then send default control instruction to described active execution units, control the shifting that described active execution units performs to preset
Dynamic operation, thus control described active execution units and drive described testpieces the most repeatedly to move；
Described default displacement range is the displacement between default maximum restraining position and default minimum restraining position
Scope.
Wherein, described active execution units includes pressurized strut and pressurized strut commutation adjustment module；
The bottom of described pressurized strut is connected with a head rod；
The top of described pressurized strut has the first mounting base, and described first mounting base is arranged on an external stability frame
On frame；
The upper and lower two ends of outer wall of described pressurized strut have a upper port and a lower port, described on
Port is connected with described pressurized strut commutation adjustment module by the pipeline of a hollow respectively with lower port；
Described pressurized strut commutation adjustment module, for described upper port and lower port, alternately applies pressure
With release pressure, described pressurized strut is driven to realize moving back and forth.
Wherein, described pressurized strut commutation adjustment module, for by the upper port air inlet of pressurized strut, giving down row
Pore aerofluxus, so that the piston rod in pressurized strut moves down, and by the lower port air inlet of pressurized strut, giving
Upper port aerofluxus, so that the piston rod in pressurized strut moves up.
Wherein, described position-limiting unit includes that spacing crossbeam, described spacing crossbeam include being spaced in vertical direction and level
The upper substrate placed and lower shoe, the two ends, left and right of described upper substrate and lower shoe are installed side plate with one respectively and are fixed even
Connect；
There is between middle part and the middle part of described lower shoe of described upper substrate the position limiting slide block of horizontal positioned and move sliding
Block, described position limiting slide block is positioned at the top of mobile slide block；
In the middle part of described upper substrate, the center of position limiting slide block be provided through a connection post, the top of described connection post
Portion is connected with the bottom of described head rod；
The bottom of described connection post is connected with described mobile slider top, the bottom centre position of described mobile slide block with
One the second connecting rod connects.
Wherein, the top of described connection post has head rod embedded groove, embeds described in described connecting rod embedded groove
The bottom of head rod；
The top center of described mobile slide block has connection post embedded groove, embeds described in described connection post embedded groove
Connect the bottom of post；
The bottom centre position of described mobile slide block has the second connecting rod embedded groove, embeds in described connection post embedded groove
The top of described second connecting rod, the bottom of described second connecting rod is connected with needing the testpieces carrying out fatigue test.
Wherein, the circumferentially-spaced of the middle part of described upper substrate, position limiting slide block, mobile slide block and lower shoe is provided through four
Individual guide post, the two ends up and down of each described guide post fix nut by a guide post respectively and are connected, described guide post
And it is matched in clearance between described position limiting slide block and mobile slide block.
Wherein, on the middle part of described upper substrate and position limiting slide block, interval is provided through caging bolt, described caging bolt
The partial threads connection protruding from upper substrate end face has a upper limit nut, and described caging bolt protrudes from upper substrate bottom surface
Partial threads connects a lower position nut.
Wherein, described spacing control unit includes a upper proximity switch, a lower proximity switch and signal processing module,
Described upper proximity switch is arranged on described position limiting slide block, and described lower proximity switch is arranged on the lower shoe of described spacing crossbeam
On；
Described upper proximity switch, for judging whether the upper surface of mobile slide block arrives default maximum restraining position, as
Fruit arrives, then send the first voltage pulse signal to signal processing module；
Described lower proximity switch, for judging whether the lower surface of mobile slide block arrives default minimum restraining position, as
Fruit arrives, then send the second voltage pulse signal to signal processing module；
Signal processing module, is connected with described upper proximity switch, the lower proximity switch phase signal of telecommunication respectively, for when receiving
During the voltage pulse signal that described upper proximity switch is sent, send to pressurized strut commutation adjustment module and move downward regulating command,
Controlling pressurized strut commutation adjustment module drives described pressurized strut to move downward；When receiving what described lower proximity switch was sent
During voltage pulse signal, send, to pressurized strut commutation adjustment module, the regulating command that moves upward, control pressurized strut commutation regulation mould
Block drives described pressurized strut to move upward.
Wherein, the described default lower surface that maximum restraining position is position limiting slide block, described default minimum restraining position
For lower shoe upper surface.
Wherein, described position limiting slide block is also equipped with a counting proximity switch, described counting proximity switch and one
Individual enumerator is connected, and described counting proximity switch is used for judging whether mobile slide block arrives default maximum restraining position,
When the position of mobile slide block arrives the maximum restraining position preset, described counting proximity switch is just sent out to described enumerator
Go out voltage pulse signal so that described rolling counters forward is once.
The technical scheme provided from the above present invention, compared with prior art, the present invention proposes a kind of with limit
Position mechanism carries out the fatigue experimental device of displacement constraint, and it can carry out maximum flexibly when testpieces is carried out fatigue test
The regulation of displacement, and cheap, and degree of flexibility is high, easy to use, it is simple to change parts, is conducive to producing widely
Application, is of great practical significance.
Accompanying drawing explanation
The control principle side of a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 1 provides for the present invention
Block diagram；
Fig. 2 shows for the stereochemical structure of a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that the present invention provides
It is intended to；
The control of a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 3 provides for the present invention connects and shows
It is intended to；
Spacing crossbeam in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 4 provides for the present invention
Perspective view；
Spacing crossbeam in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 5 provides for the present invention
The structural representation of lower shoe；
Fig. 6 is the sectional view along line A-A shown in Fig. 5；
Mobile slide block in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 7 provides for the present invention
Perspective view；
Mobile slide block in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Fig. 8 provides for the present invention
Top view；
Fig. 9 is the sectional view along line B-B shown in Fig. 8；
A kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Figure 10 provides for the present invention connects post
Perspective view；
A kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Figure 11 provides for the present invention connects post
Left view；
Figure 12 is the sectional view along line C-C shown in Figure 11；
Position limiting slide block in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Figure 13 provides for the present invention
Perspective view；
Position limiting slide block in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Figure 14 provides for the present invention
Top view；
Position limiting slide block in a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that Figure 15 provides for the present invention
Upward view；
Figure 16 is the sectional view along line D-D shown in Figure 15；
In figure, 1 is spacing crossbeam, and 101 is upper substrate, and 102 is lower shoe, and 2 is position limiting slide block, and 3 is mobile slide block, and 4 are
Guide post, 5 is caging bolt, and 6 for connecting post, and 7 is upper limit nut, and 8 fix nut for guide post, and 9 is lower position nut, 10
For pressurized strut, 20 is pressurized strut commutation adjustment module；
111 is upper port, and 112 is lower port, and 121 is head rod, and 122 is the second connecting rod, and 13 are
Testpieces, 14 is mounting base, and 15 is proximity switch fairlead, and 16 for installing side plate, and 171 is upper proximity switch installing hole, 172
For lower proximity switch installing hole, 181 is upper proximity switch, and 182 is lower proximity switch, and 183 is counting proximity switch.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings with embodiment to this
Invention is described in further detail.
Seeing Fig. 1, a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that the present invention provides, for limit
Position in the case of mechanism carries out displacement constraint, carries out fatigue test to testpieces, specifically includes active execution units 100, spacing
Unit 200 and spacing control unit 300, wherein:
Active execution units 100, for the control instruction according to spacing control unit 300, drives needs to carry out tired examination
The testpieces tested moves repeatedly, so that the displacement load that testpieces has realizes reciprocation cycle；
Position-limiting unit 200, for limiting the displacement of active execution units 100 so that described restraint performs
The testpieces that unit 100 is driven in default displacement range (particularly as follows: preset maximum restraining position and preset minimum
Displacement range between restraining position) move back and forth, and displacement range can be adjusted；
Spacing control unit 300, is connected with active execution units 100, position-limiting unit 200 respectively, for holding to activity
Row unit 100 sends startup control instruction so that active execution units 100 starts to drive testpieces to move in vertical direction,
And position-limiting unit 200 described in real-time judge detected the displacement of testpieces obtained whether reach default maximum restraining position or
Person's minimum restraining position, if reached, then sends default control instruction to described active execution units 100, controls described work
Dynamic performance element 100 performs the mobile operation preset, thus controls described active execution units 100 and drive described testpieces together
Repeatedly moving, the displacement load finally making testpieces have realizes reciprocation cycle.Without reaching default maximum
Restraining position or minimum restraining position, then control described active execution units 100 and keep the former direction of motion to continue motion.
In the present invention, seeing Fig. 2, Fig. 3, described active execution units 100 includes that pressurized strut 10 and pressurized strut commutation are adjusted
Joint module 20.
The bottom of described pressurized strut 10 is connected with a head rod 121, and the most described pressurized strut 10 inside exists
It is connected with described head rod 121 bottom the piston rod that vertical direction is arranged.
The top of described pressurized strut 10 has the first mounting base 141, and described first mounting base 141 is arranged on outside one
On portion's fixed frame, it is achieved position is fixed.
The upper and lower two ends of outer wall of described pressurized strut 10 have a upper port 111 and a lower port
112, described upper port 111 and lower port 112 are commutated with described pressurized strut by the pipeline 113 of a hollow respectively
Adjustment module 20 is connected；
Described pressurized strut commutation adjustment module 20, for described upper port 111 and lower port 112, replaces
Ground applies pressure and release pressure (i.e. a hole being applied pressure, then another hole is then discharged pressure), thus drives institute
State pressurized strut 10 (the specially piston rod in pressurized strut) to realize moving back and forth.Particularly as follows: pressurized strut commutation adjustment module 20 is used
In by upper port 111 air inlet of pressurized strut 10, to the aerofluxus of lower port 112, so that in pressurized strut 10
Piston rod moves down；Pressurized strut commutation adjustment module 20 is by lower port 112 air inlet of pressurized strut 10, to enterprising row
Pore 111 aerofluxus, so that the piston rod in pressurized strut 10 moves up.
In the present invention, it should be noted that described pressurized strut commutation adjustment module 20 can use double automatically controlled two five
Electric change valve realizes, and such as, implements, and can be Ya De visitor global group or Ningbo Xi Wo Machinery Co., Ltd.
The double automatically controlled two-position five-way solenoid directional control valve product that model is 4V220-08 produced.This solenoid directional control valve is by an air inlet
P, two gas outlet A and B, two air vent R and S compositions, be controlled by two electromagnetic switch, air inlet P therein simultaneously
Being connected with source of the gas, gas outlet A with B is connected with the upper port 111 of described pressurized strut 10 and lower port 112 respectively.When
During one of them electromagnetic switch Guan Bi, air inlet P and gas outlet A, upper port 111 communicate, gas outlet B, lower port
112 and air vent S-phase lead to, thus realize to upper port 111 air inlet of pressurized strut 10, to the aerofluxus of lower port 112, control
Pressurized strut 10 processed is mobile to a direction (the most downward)；When another electromagnetic switch closes, air inlet P and gas outlet B, under enter
Steam vent 112 communicates, and gas outlet A, upper port 111 and air vent R communicate, thus gives the lower port of pressurized strut 10
112 air inlets, to the aerofluxus of upper port 111, control pressurized strut 10 and move (i.e. moving up) in the opposite direction.
It should be noted that for described pressurized strut 10, it can be by changing airintake direction (such as by upper intake and exhaust
Hole 111 and the alternately air inlet of lower port 112), by the pressure of gas, change the internal piston having of described pressurized strut 10
The moving direction of bar, and make piston rod movement.
Seeing Fig. 4 to Figure 16, described position-limiting unit 200 includes that spacing crossbeam 1, described spacing crossbeam 1 are included in Vertical Square
Upwards interval and the upper substrate 101 of horizontal positioned and lower shoe 102, the two ends, left and right of described upper substrate 101 and lower shoe 102 are divided
Not be not fixedly connected with an installation side plate 16, thus realize spacing crossbeam 1 rigidly fix effect.
Have between middle part and the middle part of described lower shoe 102 of described upper substrate 101 horizontal positioned position limiting slide block 2 and
Mobile slide block 3, described position limiting slide block 2 is positioned at the top of mobile slide block 3.
In the present invention, seeing Figure 10 to Figure 12 in the lump, in the middle part of described upper substrate 101, the center of position limiting slide block 2 passes through
Wearing and be equipped with a connection post 6, the top of described connection post 6 is connected with the bottom of described head rod 121, particularly as follows:
The top of described connection post 6 has head rod embedded groove 60, embeds described first and connect in described connecting rod embedded groove 60
The bottom of bar 121.
Seeing Fig. 7 to Fig. 9 in the lump, the bottom of described connection post 6 is connected with described mobile slide block 3 top, particularly as follows: institute
The top center stating mobile slide block 3 has connection post embedded groove 30, embeds described connection in described connection post embedded groove 30
The bottom of post 6.
Implementing, bottom centre position and second connecting rod 122 of described mobile slide block 3 connect, particularly as follows:
The bottom centre position of described mobile slide block 3 has the second connecting rod embedded groove 31, embeds institute in described connection post embedded groove 30
State the top of the second connecting rod 122.
Implementing, the bottom of described second connecting rod 122 is connected with needing the testpieces 13 carrying out fatigue test,
The bottom of described testpieces 13 connect have the second mounting base 142, described second mounting base 142 be also mounted at one described outside
On portion's fixed frame, it is achieved position is fixed.
In the present invention, between the surrounding of the middle part of described upper substrate 101, position limiting slide block 2, mobile slide block 3 and lower shoe 102
Every being provided through four guide posts 4, nut 8 is fixed by a guide post respectively in the two ends up and down of each described guide post 4
It is connected, is matched in clearance between described guide post 4 and described position limiting slide block 2 and mobile slide block 3, ensures the coaxial of cooperation simultaneously
Degree so that the regulation of position limiting slide block 2 and the reciprocating motion of mobile slide block 3 can only be in vertical direction, it is to avoid produce vertically
Rotation and the inclination of horizontal direction.
In the present invention, on the middle part of described upper substrate 101 and position limiting slide block 2, interval is provided through caging bolt 5, institute
Stating caging bolt 5 to protrude from the partial threads of upper substrate 101 end face and connect and have a upper limit nut 7, described caging bolt 5 is dashed forward
Connect for the partial threads of upper substrate 101 bottom surface and have a lower position nut 9, therefore, as in figure 2 it is shown, fatigue test personnel
Can be by fine setting upper limit nut 7 and lower position nut 9, it is achieved the slow regulation to position limiting slide block 2 position, so that it is guaranteed that this
The invention satisfactory precision of size to the displacement that testpieces carries out fatigue test, it is achieved with displacement for controlling parameter and displacement
Adjustable fatigue test.When, behind the position that position limiting slide block 2 is adjusted to required for fatigue test personnel, fatigue test personnel are simultaneously
Locking upper limit nut 7 and lower position nut 9 so that position limiting slide block 2 carries out rigidity even by caging bolt 5 and spacing crossbeam 1
Connect.
For position-limiting unit 200, implement, the lower surface of position limiting slide block 2 and the lower shoe 102 of spacing crossbeam 1
Upper surface, respectively by contacting with the upper and lower surface of described mobile slide block 3 and inconsistent, in conjunction with following spacing control single
The effect of unit 300 and operation principle, it is achieved the control to the concrete shift position of mobile slide block 3 upper and lower surface, thus
Realize the Bit andits control of fatigue and cyclic.
Seeing Fig. 3, for the present invention, described spacing control unit 300 includes connecing under a upper proximity switch 181,
Nearly switch 182 and signal processing module 301, described upper proximity switch 181 is arranged on described position limiting slide block 2, described lower close
Switch 182 is arranged on the lower shoe 102 of described spacing crossbeam 1.
Implementing, described upper proximity switch 181 is arranged on described position limiting slide block by upper proximity switch installing hole 171
On 2, descended proximity switch 182 is arranged on the lower shoe 102 of described spacing crossbeam 1 by lower proximity switch installing hole 172.
See Figure 15 and Figure 16, the sealed bottom of described upper proximity switch installing hole 171.
It should be noted that proximity switch is a kind of without carrying out mechanically direct contact with moving component and manipulable
Position switch, when the sensitive surface of object proximity switch is to operating distance, it is not necessary to Mechanical Contact and apply any pressure
Make switch motion, thus drive DC electric apparatus or provide control instruction to computer installation.
In the present invention, for proximity switch, it is used for judging whether mobile slide block 3 arrives restraining position set in advance
(distance of reaction i.e. preset), when the position of mobile slide block 3 arrives within the predetermined inductive distance of proximity switch, proximity switch
Voltage pulse signal can be given.
Wherein, described upper proximity switch 181, for judging whether the upper surface of mobile slide block 3 arrives position, preset upper limit position
Putting (the most aforesaid default maximum restraining position, such as position limiting slide block 2 lower surface), position, described preset upper limit position is distance institute
Stating proximity switch 181 is the position of distance of reaction preset, if arrived, then send the first voltage pulse signal to signal at
Reason module 301；
Described lower proximity switch 182, for judging whether the lower surface of mobile slide block 3 arrives position, pre-determined lower limit position (i.e.
Aforesaid default minimum restraining position, such as lower shoe 102 upper surface), position, described pre-determined lower limit position is under described
Proximity switch 182 is the position of the distance of reaction preset, if arrived, then sends the second voltage pulse signal to signal processing mould
Block 301.
Signal processing module 301, is connected with described upper proximity switch 181, the lower proximity switch 182 phase signal of telecommunication respectively, uses
In the voltage pulse signal sent according to proximity switch, send regulating command to pressurized strut commutation adjustment module 20, particularly as follows: use
In when receiving the voltage pulse signal that described upper proximity switch 181 is sent, to pressurized strut commutation adjustment module 20 send to
Lower motor adjustment order, controls pressurized strut commutation adjustment module 20 and drives described pressurized strut 10 to move downward；When receiving
During the voltage pulse signal that described lower proximity switch 182 is sent, send, to pressurized strut commutation adjustment module 20, the regulation that moves upward
Order, controls pressurized strut commutation adjustment module 20 and drives described pressurized strut 10 (containing piston rod therein) to move upward.
Implement, when the upper surface of mobile slide block 3 arrives position, pre-determined lower limit position (such as position limiting slide block 2 lower surface)
Time, upper proximity switch 181 records signal, and voltage pulse signal passes to signal processing module 301, signal processing module 301
Thus send to pressurized strut commutation adjustment module 20 and move downward regulating command, control pressurized strut commutation adjustment module 20 and drive institute
State pressurized strut 10 to move downward, particularly as follows: control pressurized strut commutation adjustment module 20 to the upper port of pressurized strut 10
111 air inlets, to the aerofluxus of lower port 112, so that the piston rod in pressurized strut 10 moves down, further by connecting
Bar 12, connection post 6, the linkage effect of mobile slide block 3 so that testpieces 13 is compressed.
Implement, when the lower surface of mobile slide block 3 arrives position, pre-determined lower limit position (going to the bottom of the most spacing crossbeam 1
The upper surface of plate 102) time, lower proximity switch 182 records signal, and voltage pulse signal passes to signal processing module 301, letter
Number processing module 301 thus send, to pressurized strut commutation adjustment module 20, the regulating command that moves upward, control pressurized strut commutation and adjust
Joint module 20 drives described pressurized strut 10 to move upward, particularly as follows: control pressurized strut commutation adjustment module 20 to pressurized strut
Lower port 112 air inlet of 10, to the aerofluxus of upper port 111, so that the piston rod in pressurized strut 10 moves up,
Further by connecting rod 12, connect post 6, the linkage effect of mobile slide block 3 so that testpieces 13 is stretched.So week
And renew, under the control of described spacing control unit 300, it is achieved fatigue testpieces 13 constantly being stretched and compressing
Circulation.
In the present invention, see Fig. 3, described position limiting slide block 2 is also equipped with a counting proximity switch 183, described
Counting proximity switch 183 is connected with an enumerator, and described counting proximity switch 183 is used for judging that mobile slide block 3 is
The maximum restraining position (distance of reaction i.e. preset) that no arrival is preset, whenever the position of mobile slide block 3 arrives counting with close
Time within the predetermined inductive distance of switch 183, (the maximum restraining position preset is specially mobile slide block 3 and moves to spacing cunning
During block 2 lower surface), described counting proximity switch 183 just sends voltage pulse signal to described enumerator so that described counting
Device counts once.
In the present invention, implementing, described upper proximity switch, lower proximity switch and counting proximity switch can select
Select the metal approach that model the is E3-D4PAW-40 switch that Suzhou vast photoswitch company limited produces, or upper Haitai is military
Electrical Appliances Co., Ltd produce the metal approach that model is E3-D4ZB switch, this inductance approach switch, when inductive probe with
When the distance of metal material is less than 4mm, a voltage signal will be produced, thus judge that mobile slide block 3 arrives the most spacing
Moment.
For the present invention, implementing, described signal processing module 301 can be central processor CPU, digital signal
Processor DSP or single-chip microprocessor MCU.
For the present invention, implement, see Fig. 4, described upper substrate 101 has two pull-switch fairleads
15, thus facilitate the lead-in wire of described counting proximity switch 183 and upper proximity switch 181 to derive so that can distinguish easily
Linkage counter and signal processing module.
It should be noted that the present invention is a kind of fatigue experimental device, it is therefore desirable to three of solution technical problem is that:
One, the reciprocation cycle of the load of testpieces is realized；Two, the load of Control experiment part is circulated within the scope of requiring；Three,
The load of guarantee test part is run and safe and reliable continuously.The solution that the present invention uses is that this device is mainly by three big portions
It is grouped into: one is position-limiting unit；Two is to include pressurized strut and the active execution units of its commutation adjustment module；Three is to include metal
Inductive proximity switch and the spacing control unit of pressurized strut commutation control module composition.Wherein, spacing control unit realizes test
The running continuously and automatically control of the cyclic loading of part, active execution units realizes back and forth following of the displacement load that testpieces has
Ring, position-limiting unit realizes the displacement of testpieces and moves within the scope of requiring.
A kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that the present invention is provided, it is possible to achieve with position
Move the fatigue test to testpieces for controlling parameter, and the displacement size of testpieces is adjustable, and each ingredient
To be replaced easily, thus realize the fatigue test to testpieces of different size, different loads requirement.The present invention for
The foundation of fatigue experimental device is the building of base structure, can meet the needs of simple experiment on fatigue properties, with often
Electro-hydraulic servo fatigue test piece compare, this design can realize again degree of flexibility high, easy to use, change parts letter
Single easy.And this apparatus cost is cheap, it is especially suitable for the needs of medium and small laboratory establishment fatigue test system.
Therefore, a kind of fatigue experimental device carrying out displacement constraint with position-limit mechanism that the present invention provides, it can be with pole
Its form realization flexibly is circulated the control of displacement with position-limit mechanism, realizes the circulation of the loading end of testpieces with pressurized strut
Moving back and forth, whether above proximity switch and lower proximity switch judge the displacement (i.e. moving the displacement of slide block) of testpieces respectively
Reach default setting, and then the reciprocating motion to pressurized strut provides control signal, such that it is able to conveniently realize with displacement
For controlling parameter and the adjustable cycling fatigue experiment of displacement, and apparatus cost is cheap, simple structure, replacing convenience, applicable
In extensive range.
In sum, compared with prior art, a kind of of present invention offer carries out the tired of displacement constraint with position-limit mechanism
Labor assay device, it when testpieces is carried out fatigue test, can carry out the regulation of maximum displacement flexibly, and cost is low
Honest and clean, degree of flexibility is high, easy to use, it is simple to change parts, is conducive to production application widely, has great production real
Trample meaning.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. the fatigue experimental device carrying out displacement constraint with position-limit mechanism, it is characterised in that including:
Active execution units (100), for the control instruction according to spacing control unit (300), drives needs to carry out tired examination
The testpieces tested moves repeatedly；
Position-limiting unit (200), for limiting the displacement of active execution units (100) so that described restraint performs
The testpieces that unit (100) is driven moves back and forth in default displacement range, and can be adjusted displacement range；
Spacing control unit (300), is connected with active execution units (100), position-limiting unit (200) respectively, for activity
Performance element (100) sends startup control instruction so that active execution units (100) starts to drive testpieces in vertical direction
Motion, and position-limiting unit described in real-time judge (200) detected the maximum limit whether displacement of testpieces of acquisition reaches default
Position, position or minimum restraining position, if reached, then send default control instruction to described active execution units (100),
Control the mobile operation that described active execution units (100) performs to preset, thus control described active execution units (100) and drive
Described testpieces moves the most repeatedly；
Described default displacement range is the displacement range between default maximum restraining position and default minimum restraining position.
2. fatigue experimental device as claimed in claim 1, it is characterised in that described active execution units (100) includes start
Cylinder (10) and pressurized strut commutation adjustment module (20)；
The bottom of described pressurized strut (10) is connected with a head rod (121)；
The top of described pressurized strut (10) has the first mounting base (141), and described first mounting base (141) is arranged on one
On external stability framework；
The upper and lower two ends of outer wall of described pressurized strut (10) have a upper port (111) and a lower port
(112), described upper port (111) and lower port (112) are respectively by the pipeline (113) of a hollow and described work
Dynamic cylinder commutation adjustment module (20) is connected；
Described pressurized strut commutation adjustment module (20), for described upper port (111) and lower port (112), replaces
Ground applies pressure and release pressure, drives described pressurized strut (10) to realize moving back and forth.
3. fatigue experimental device as claimed in claim 2, it is characterised in that described pressurized strut commutation adjustment module (20), uses
In by upper port (111) air inlet of pressurized strut (10), to lower port (112) aerofluxus, so that pressurized strut
(10) piston rod in moves down, and by lower port (112) air inlet of pressurized strut (10), to upper port
(111) aerofluxus, so that the piston rod in pressurized strut (10) moves up.
4. fatigue experimental device as claimed in claim 1, it is characterised in that described position-limiting unit (200) includes spacing crossbeam
(1), described spacing crossbeam (1) includes being spaced in vertical direction and the upper substrate (101) of horizontal positioned and lower shoe (102),
The two ends, left and right of described upper substrate (101) and lower shoe (102) are installed side plate (16) with one respectively and are fixedly connected；
There is between middle part and the middle part of described lower shoe (102) of described upper substrate (101) position limiting slide block (2) of horizontal positioned
With mobile slide block (3), described position limiting slide block (2) is positioned at the top of mobile slide block (3)；
Described upper substrate (101) middle part, the center of position limiting slide block (2) are provided through a connection post (6), described connection
The top of post (6) is connected with the bottom of described head rod (121)；
The bottom of described connection post (6) is connected with described mobile slide block (3) top, the bottom centre of described mobile slide block (3)
Position connects with second connecting rod (122), the bottom of described second connecting rod (122) with need to carry out the examination of fatigue test
Test part to be connected.
5. fatigue experimental device as claimed in claim 4, it is characterised in that the top of described connection post (6) has first even
Extension bar embedded groove (60), embeds the bottom of described head rod (121) in described connecting rod embedded groove (60)；
The top center of described mobile slide block (3) has connection post embedded groove (30), in described connection post embedded groove (30)
Embed the bottom of described connection post (6)；
The bottom centre position of described mobile slide block (3) has the second connecting rod embedded groove (31), described connection post embedded groove
(30) top of described second connecting rod (122) is embedded in.
6. fatigue experimental device as claimed in claim 4, it is characterised in that the middle part of described upper substrate (101), position limiting slide block
(2), the circumferentially-spaced moving slide block (3) and lower shoe (102) is provided through four guide posts (4), each described guide post
(4) two ends up and down are fixed nut (8) by a guide post respectively and are connected, described guide post (4) and described position limiting slide block
And be matched in clearance between mobile slide block (3) (2).
7. fatigue experimental device as claimed in claim 4, it is characterised in that the middle part of described upper substrate (101) and spacing cunning
The upper interval of block (2) is provided through caging bolt (5), and described caging bolt (5) protrudes from the part spiral shell of upper substrate (101) end face
Stricture of vagina connects a upper limit nut (7), and described caging bolt (5) protrudes from the partial threads of upper substrate (101) bottom surface and connects
There is a lower position nut (9).
8. fatigue experimental device as claimed in claim 4, it is characterised in that described spacing control unit (300) includes
Upper proximity switch (181), a lower proximity switch (182) and signal processing module (301), described upper proximity switch (181) is pacified
Being contained on described position limiting slide block (2), described lower proximity switch (182) is arranged on the lower shoe (102) of described spacing crossbeam (1)
On；
Described upper proximity switch (181), is used for judging whether the upper surface of mobile slide block (3) arrives the spacing position of default maximum
Putting, if arrived, then sending the first voltage pulse signal to signal processing module (301)；
Described lower proximity switch (182), is used for judging whether the lower surface of mobile slide block (3) arrives the spacing position of default minimum
Putting, if arrived, then sending the second voltage pulse signal to signal processing module (301)；
Signal processing module (301), is connected with described upper proximity switch (181), lower proximity switch (182) the phase signal of telecommunication respectively,
For when receiving the voltage pulse signal that described upper proximity switch (181) is sent, to pressurized strut commutation adjustment module (20)
Send and move downward regulating command, control pressurized strut commutation adjustment module (20) and drive described pressurized strut (10) to transport downwards
Dynamic；When receiving the voltage pulse signal that described lower proximity switch (182) is sent, send out to pressurized strut commutation adjustment module (20)
Go out the regulating command that moves upward, control pressurized strut commutation adjustment module (20) and drive described pressurized strut (10) to move upward.
9. fatigue experimental device as claimed in claim 8, it is characterised in that described default maximum restraining position is spacing cunning
The lower surface of block (2), described default minimum restraining position is lower shoe (102) upper surface.
10. the fatigue experimental device as according to any one of claim 4 to 9, it is characterised in that on described position limiting slide block (2)
Being also equipped with a counting proximity switch (183), described counting proximity switch (183) is connected with an enumerator, institute
State counting proximity switch (183) to be used for judging whether mobile slide block (3) arrives default maximum restraining position, whenever mobile sliding
When the position of block (3) arrives the maximum restraining position preset, described counting proximity switch (183) just sends to described enumerator
Voltage pulse signal so that described rolling counters forward is once.
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| CN201610810530.1A CN106323775B (en) | 2016-09-08 | 2016-09-08 | Fatigue test device for carrying out displacement constraint by limiting mechanism |
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| CN106323775B (en) | 2023-05-26 |
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