CN106442182A - High-temperature micro-motion fatigue experiment clamping and loading device - Google Patents
High-temperature micro-motion fatigue experiment clamping and loading device Download PDFInfo
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- CN106442182A CN106442182A CN201610835317.6A CN201610835317A CN106442182A CN 106442182 A CN106442182 A CN 106442182A CN 201610835317 A CN201610835317 A CN 201610835317A CN 106442182 A CN106442182 A CN 106442182A
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- high temperature
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- extension rod
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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
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the field of materials, and particularly discloses a high-temperature micro-motion fatigue experiment clamping and loading device. The device comprises a micro-motion device and a high temperature furnace, wherein micro-motion device comprises a supporting frame; two stepping motor mounting plates are respectively arranged at the two ends of the supporting frame; the two ends of a guide rod are respectively fixed on the two stepping motor mounting plates; a pair of symmetrical sliding mechanisms are further mounted on the guide rod; a micro-motion pad is arranged on each sliding mechanism; the positions of the pair of micro-motion pads are opposite to each other; the high temperature furnace is mounted on the supporting frame through a supporting plate; the micro-motion pads stretch into the high temperature furnace through working holes and prop against a sample inside the high temperature furnace; the high temperature furnace is further provided with a vertical extension rod stretching hole; a stretching hole in the lower end of an extension rod stretches into the interior of the high temperature hole and is connected with the sample; the upper end of the extension rod is connected with an amplifier. The two sides of a tension-compression test piece of the device respectively transmit normal contact pressure through screws, a force sensor is mounted on each of the baffles on the left and right sides, and the normal contact pressure on the two sides is synchronously measured, so that true equality of the normal contact pressure on the two sides in an experiment is guaranteed.
Description
Technical field
The invention belongs to Material Field, specially Temperature Fretting fatigue experiment clamping and charger.
Background technology
Two objects contacting with each other, by under the effect of periodic vibration load, can produce the phase of subrange between contact surface
To slip, the fatigue fracture of this slip meeting accelerating structure, this phenomenon is called fretting fatigue.Fretting fatigue phenomenon is widely present
In fields such as machinery, traffic, electric power, Aero-Space or even biomedical engineerings, it can accelerate the fatigue crack initiation of parts
With extension, thus substantially reducing its service life, or even causing catastrophic failure, being therefore referred to as the cancer in industry.
The factor in impact fretting fatigue life-span is numerous, and principal element includes temperature, normal direction contact pressure, loading frequency and connects
Tactile area geometry etc..For the fretting fatigue behavior of research material, research worker angularly goes to analyze from temperature, normal stress
The fretting fatigue behavior of material.Because fretting fatigue testing machine has not yet been formed unified standard at this stage, design is a set of to be easy to reality
The fretting fatigue behavior of the experimental provision model configuration applied seems very necessary.Fretting fatigue experimental provision at this stage mainly closes
The applying of note fretting fatigue normal direction contact pressure, it is difficult to ensure that the contact pressure of test specimen both sides is equal when loading.As for can be one
The device determining to implement fretting fatigue experiment at temperature does not even more have.
Chinese patent description CN201410590091 discloses a kind of fretting fatigue experiment test specimen clamping and loads dress
Put, this device can achieve the foot bridge automatic centering of loading side, and compression test specimen is loaded simultaneously.This load mode does not have inter-agency
Friction or can be approximately considered compression test specimen both sides contact pressure during frictional force very little equal, but be stained with when between equipment mechanism dust or
Time of shelving is longer when leading to get rusty, and the contact pressure of compression test specimen both sides is not necessarily equal.Moreover this invention is only with one
Individual force transducer is although save fund, but whether the both sides contact pressure that is uncertain about is really equal.This device side's foot bridge is installed
There is hemispheric pit at the bolt pressure position of seat, other side's foot bridge compression when tightening loading bolt, in side's foot bridge mounting seat
Face can automatically and compression test specimen two side plane keeping parallelism is it is ensured that the surface-to-surface Full connected of side foot bridge plane and test specimen.Due to
Fretting contact face geometry is different, have plate-plate contact, the face of cylinder-plane contact, the face of cylinder-Cylindrical Surfaces Contact it is clear that
This device can not flexibly switch this several contact form to study the impact to fretting fatigue behavior for the contact surface geometry.
One of the reason temperature is also the impact fretting fatigue life-span, this device can not provide certain when implementing fretting fatigue experiment
Hot environment.Fatigue test is all to implement under certain stress ratio, and this invention can not adjust stress ratio.
Specifically, the shortcoming of prior art：
Shortcoming one：This load mode can be approximately considered compression test specimen two in inter-agency not friction or frictional force very little
Side joint touch pressure is equal, but is stained with dust when between equipment mechanism or the time of shelving is longer when leading to get rusty, compression test specimen both sides
Contact pressure is not necessarily equal.Moreover this invention but is uncertain about two only with a force transducer although saving fund
Whether side joint touch pressure is really equal.
Shortcoming two：There is hemispheric pit at the bolt pressure position of this device side's foot bridge mounting seat, when tightening loading bolt,
Other side's foot bridge seal face in side's foot bridge mounting seat can automatically with compression test specimen two side plane keeping parallelism it is ensured that square sufficient
Bridge plane and the surface-to-surface Full connected of test specimen.Because fretting contact face geometry is different, have plate-plate contact, the face of cylinder-
Plane contact, the face of cylinder-Cylindrical Surfaces Contact are it is clear that this device can not flexibly switch this several contact form to study contact
The impact to fretting fatigue behavior for the face geometry.
Shortcoming three：One of the reason temperature is also the impact fretting fatigue life-span, this device can not implement fretting fatigue
Certain hot environment is provided during experiment.
Shortcoming four：Fatigue test is always implemented under certain stress ratio, and this device does not enable the regulation of stress ratio.
Content of the invention
For solving the above problems, the present invention provides a kind of Temperature Fretting fatigue experiment clamping and charger, implements fine motion
Certain hot environment is provided it is possible to adjust stress during fatigue experiment.
Temperature Fretting fatigue experiment clamping and charger, including by inching gear and high temperature furnace；Described inching gear
Including bracing frame, two pieces of motor installing plates are respectively on bracing frame two ends；The two ends of guide rod fix two pieces respectively in stepping
On motor mounting plate, guide rod is also equipped with a pair symmetrical slide mechanism, slide mechanism has fine motion pad, a pair of fine motion pad position
Put relatively；
High temperature furnace is arranged on bracing frame by gripper shoe, and is located between pair of sliding mechanism；There is work high temperature furnace both sides
Make hole, fine motion pad is stretched in high temperature furnace by working hole, withstands the style within high temperature furnace；High temperature furnace also has vertical extension rod
Stretch into hole；Extension rod lower end is stretched into hole and is stretched into inside high temperature furnace, connects sample, and the upper end of extension rod connects amplifier.
Described slide mechanism, also includes slide block, line rail；Fine motion pad is fixed on slide block by connector；Slide block two ends
Connected on online rail by erection support respectively；Line rail is fixed in the line rail mounting groove on bracing frame；There is through hole on slide block, lead
Bar passes through hole on slide block, and guide rod slides for slide block and provides guiding；Baffle plate is located between slide block and motor installing plate, and guide rod is worn
Cross the baffle plate through hole on baffle plate, and be cased with by hairspring on guide rod, hairspring two ends connect baffle plate and slide block respectively；Step
Mounting flange on stepper motor installing plate, flange inner diameter has ball, and screw mandrel passes through flange inner diameter freely rotatable；Screw mandrel is by being arranged on
Screw mandrel seat supports on support；Screw mandrel one end is threaded connection baffle plate；Pressure transducer is installed between baffle plate and slide block.
The screw mandrel other end connects stirs knob, or, the screw mandrel other end connects motor.
Also include the second extension rod, the second extension rod upper end is stretched into hole by the extension rod of high temperature furnace bottom and connected high temperature furnace
Interior sample, the second extension rod lower end connects the second amplifier；Second extension rod is connected with universal testing machine by round platform.
Temperature Fretting fatigue experiment clamping and charger that the present invention provides, compression test specimen both sides are respectively by stepping electricity
Machine drives leading screw transmission normal direction contact pressure, is respectively mounted a force transducer, synchro measure on the baffle plate of the left and right sides simultaneously
The normal direction contact pressure of both sides it is ensured that in experiment both sides normal direction contact pressure really equal.
In order to study different geometrical contacts in the face of the impact of fretting fatigue behavior, the fine motion pad of the present invention is designed as removable
Unload the dynamic pad that declines, the geometric shape of fine motion pad can be designed according to different geometrical contact faces, be then fixed on connector peace again
In tankage.
By high temperature furnace, test specimen is heated, implement the Temperature Fretting fatigue experiment under uniform temperature.Micro- in order to adjust
The stress ratio of dynamic fatigue, amplifier passes through the circular hole on the round platform of this bottom of device, holds extension rod, then adjusts herein for adjusting
Universal testing machine beam height, it is possible to achieve the regulation of stress ratio.
Because high temperature in-furnace temperature is high, heat is delivered on big slide block by connector, on leading screw, affects force transducer
Using effect, so axially opening two through holes in slide block, being passed through water and being circulated cooling.
Brief description
With reference to the accompanying drawings and detailed description the present invention is further described in detail.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the fine motion pad connecting-piece structure schematic diagram of the present invention；
Fig. 3 is line rail and the slide block mounting structure schematic diagram of the present invention；
Fig. 4 is the support frame structure schematic diagram of the present invention；
Fig. 5 is the baffle arrangement schematic diagram of the present invention；
Fig. 6 is slide block and the motor installing plate scheme of installation of the present invention；
Fig. 7 is the fine motion part-structure figure of the present invention；
Fig. 8 is the screw mandrel of the present invention, baffle plate, pressure transducer partial structural diagram；
Fig. 9 is the high temperature furnace mounting structure schematic diagram of the present invention；
Figure 10 is the amplifier of the present invention, extension rod, test specimen, round platform attachment structure schematic diagram；
Figure 11 is experimentation design sketch on universal testing machine for the present invention.
Specific embodiment
It is described in conjunction with the embodiments the specific embodiment of the present invention.
As shown in figure 1, Temperature Fretting fatigue experiment clamping and charger, by inching gear and high temperature furnace 29 two large divisions
Composition.Fine motion phenomenon simulated by inching gear, applies the normal direction contact pressure of fine motion, and to the normal direction contact during fretting fatigue
Pressure change carries out real-time monitoring, and in the process, high temperature furnace provides uniform temperature to test specimen, to study temperature to test specimen fine motion
The impact of fatigue behaviour.
As shown in Figure 2 and Figure 3, in the present invention, fine motion pad 1 is arranged in the fine motion pad mounting groove 3 of connector 2 one end, makes micro-
Dynamic pad 1 is overlapped with two bolts hole in fine motion pad mounting groove 3, is then connected with again.The middle part of slide block 4 have one recessed
Groove, has two bolts hole in groove, connector 2 other end also has two bolts hole running through, this one end is arranged in slide block 4
In the groove in portion, so that bolt hole is overlapped, be then connected with again.Slide block 4 two ends have four bolts hole running through respectively, pass through
This four bolts hole, with bolt by the erection support 6 of fixing for slide block 4 online rail 5, slide block 4 can be in-orbit with erection support 6
Slide on road.As shown in figure 4, having a bolt hole in line rail mounting groove 9 on bracing frame 8, also there is a spiral shell end of line rail 5
Keyhole, by fixing for line rail 5 online rail mounting groove 9, is joined with bolts.As shown in figure 5, on motor installing plate 10
Bolt hole 11 is corresponding with the bolt hole 12 on bracing frame 8, is joined with bolts.As shown in Fig. 6, Fig. 7, Fig. 8, guide rod 13 two ends
There is screw thread, guide rod 13 is passed through the screw 15 of motor mounting plate 10, the through hole 16 of slide block 4 nut to be fixed on motor peace
On dress plate 10, baffle plate flange 17 is installed at the hole of baffle plate 14.It is connected with the hairspring 18 of lightweight between baffle plate 14 and slide block 4,
Certain function of shock insulation can be played.Mounting flange 21 at circular hole 20 on motor installing plate 10, flange 21 is internal to be rolling
Pearl, screw mandrel 22 can pass through flange 21, freely rotatable.Screw mandrel 22 is supported by the screw mandrel bearing 19 being arranged on bracing frame 8.Baffle plate
Equipped with screw flange 23 on 14, screw flange 23 be internally screw-threaded hole, screw mandrel 22 can be with connection wire rod flange 23.When screw mandrel 22
During rotation, baffle plate 14 can move left and right.Pressure transducer 24 is installed between baffle plate 14 and slide block 4.Stir knob 25 to rotate
During screw mandrel 22, baffle plate 14 squeeze pressure sensor 24, transmits normal direction contact pressure.In this device, stir knob 25 and can change
For motor, realize the automatic applying of normal direction contact pressure.Because this device is symmetrical, therefore, it is possible to ensure device two ends
The normal direction contact pressure being applied is equal.
High temperature furnace 29 adopts Resistant heating, built-in temperature sensor and temperature controller, Real-time Collection in-furnace temperature number
According to, and export on external touch screen, can be shown by external touch screen and adjust temperature.As shown in figure 4, high temperature furnace supports
Plate 26 is bolted on the crossbeam 27 of bracing frame 8.Four bolts hole 28 are had on high temperature furnace gripper shoe 8, high temperature furnace 29
Four corresponding bolts hole are also arranged at bottom, by bolt, high temperature furnace are fixed in high temperature furnace gripper shoe 26, as Fig. 9 institute
Show.As shown in Figure 10, during experiment, fine motion pad 1 stretches into hole 30 by connector, withstands the style of stove interior.Extension rod 32 is stretched
Enter hole 31 and stretch into stove interior, connect sample, meanwhile, the other end of extension rod 32 connects amplifier 33, is so implemented with
Fretting fatigue experiment under uniform temperature, fatigue stress at this time ratio is for 1.In order to realize other stress ratios, can reuse
Second extension rod 35 and the second amplifier 36, the second extension rod 35 stretches into hole by the extension rod of high temperature furnace 29 bottom and connects stove
Interior sample, round platform 34 is fixed on universal testing machine, as shown in figure 11.Second amplifier 36 passes through the circular hole on round platform 34 top
It is connected with the second extension rod 35.At this time sample is actually held by upper and lower two amplifiers.Can first prestretching before experiment
Sample, makes to have prestressing force inside sample, thus reaching the purpose of stress ratio regulation.
As shown in fig. 7, heat can be delivered on slide block 4 by connector 2, for reducing the temperature of slide block 4 as far as possible, reduce temperature
The impact to pressure transducer 24 sensitivity for the degree, the axial direction along slide block 4 makes a call to two through holes 37, and water flowing is circulated cooling, so
The structure near high temperature furnace 29 can be made to keep certain temperature, so that it is guaranteed that the precision of force transducer 24.
Claims (5)
1. Temperature Fretting fatigue experiment clamping and charger it is characterised in that：Including by inching gear and high temperature furnace (29)；Institute
The inching gear stated includes bracing frame (8), and two pieces of motor installing plates (10) are respectively on bracing frame (8) two ends；Guide rod
(13) two ends fix two pieces respectively on motor installing plate (10)；
A pair symmetrical slide mechanism is also equipped with guide rod (13), slide mechanism has fine motion pad (1), a pair of fine motion pad (1)
Position is relatively；
High temperature furnace (29) is arranged on bracing frame (8) by gripper shoe, and is located between pair of sliding mechanism；High temperature furnace (29) two
There is working hole (30) side, and fine motion pad (1) is stretched in high temperature furnace (29) by working hole (30), withstands the internal formula of high temperature furnace (29)
Sample；
High temperature furnace (29) also has vertical extension rod to stretch into hole (31)；Extension rod (32) lower end is stretched into hole (31) and is stretched into high temperature furnace
(29) internal, connect sample, the upper end of extension rod (32) connects amplifier (33).
2. Temperature Fretting fatigue experiment clamping according to claim 1 and charger it is characterised in that：Described slip
Mechanism, also includes slide block (4), line rail (5)；Fine motion pad (1) is fixed on slide block (4) by connector (2)；Slide block (4) two ends
Connected on online rail (5) by erection support (6) respectively；Line rail (5) is fixed on line rail mounting groove (9) on bracing frame (8) Nei；
Through hole is had on slide block (4), guide rod (13) passes through the upper hole of slide block (4), guide rod (13) is that slide block (4) slip provides guiding；
Baffle plate (14) is located between slide block (4) and motor installing plate (10), and guide rod (13) passes through the baffle plate on baffle plate (14)
Through hole, and it is cased with by hairspring (18) on guide rod (13), hairspring (18) two ends connect baffle plate (14) and slide block respectively
(4)；Pressure transducer (24) is installed between baffle plate (14) and slide block (4)；
The upper mounting flange (21) of motor installing plate (10), flange (21) internal diameter has ball, and screw mandrel (22) passes through flange (21)
Internal diameter is freely rotatable；Screw mandrel (22) is supported by the screw mandrel bearing (19) being arranged on bracing frame (8)；Spiral shell is passed through in screw mandrel (22) one end
Stricture of vagina connects baffle plate (14).
3. Temperature Fretting fatigue experiment clamping according to claim 2 and charger it is characterised in that：Described screw mandrel
(22) knob (25) is stirred in other end connection.
4. Temperature Fretting fatigue experiment clamping according to claim 2 and charger it is characterised in that：Described screw mandrel
(22) other end connects motor.
5. the Temperature Fretting fatigue experiment clamping according to any one of claim 1 to 4 and charger it is characterised in that：
Described also includes the second extension rod (35), and hole is stretched into by the extension rod of high temperature furnace (29) bottom in the second extension rod (35) upper end
Connect the sample in high temperature furnace (29), the second extension rod (35) lower end connects the second amplifier (36)；Second extension rod (35) leads to
Cross round platform (34) to be connected with universal testing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610835317.6A CN106442182A (en) | 2016-09-20 | 2016-09-20 | High-temperature micro-motion fatigue experiment clamping and loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610835317.6A CN106442182A (en) | 2016-09-20 | 2016-09-20 | High-temperature micro-motion fatigue experiment clamping and loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106442182A true CN106442182A (en) | 2017-02-22 |
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ID=58166042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610835317.6A Pending CN106442182A (en) | 2016-09-20 | 2016-09-20 | High-temperature micro-motion fatigue experiment clamping and loading device |
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| CN (1) | CN106442182A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732035A (en) * | 2018-04-28 | 2018-11-02 | 南京航空航天大学 | A kind of Temperature Fretting method for testing fatigue life of tenon connecting structure |
| CN109100219A (en) * | 2018-05-31 | 2018-12-28 | 西北工业大学 | Fretting fatigue testing device and method |
| CN109507039A (en) * | 2018-10-15 | 2019-03-22 | 西北工业大学 | Temperature Fretting fatigue experimental device and test method based on bending deformation |
| CN110108574A (en) * | 2019-05-27 | 2019-08-09 | 南京工业大学 | A kind of assembled high temperature loading test platform |
| CN110132739A (en) * | 2019-05-24 | 2019-08-16 | 北京航空航天大学 | A kind of fretting fatigue testing normal load loading device and method |
| CN110220786A (en) * | 2019-07-04 | 2019-09-10 | 浙江工业大学 | A kind of controllable load normal direction loading device of steady type |
| CN110608963A (en) * | 2019-10-16 | 2019-12-24 | 西南交通大学 | Self-coordination fretting fatigue device capable of accurately measuring displacement and friction force and test method |
| CN110926972A (en) * | 2018-09-18 | 2020-03-27 | 中国航发商用航空发动机有限责任公司 | Fretting fatigue surface crack detection method and system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732035B (en) * | 2018-04-28 | 2020-07-28 | 南京航空航天大学 | High-temperature fretting fatigue life testing method for tenon connection structure |
| CN108732035A (en) * | 2018-04-28 | 2018-11-02 | 南京航空航天大学 | A kind of Temperature Fretting method for testing fatigue life of tenon connecting structure |
| CN109100219A (en) * | 2018-05-31 | 2018-12-28 | 西北工业大学 | Fretting fatigue testing device and method |
| CN109100219B (en) * | 2018-05-31 | 2021-04-27 | 西北工业大学 | Fretting fatigue test device and method |
| CN110926972A (en) * | 2018-09-18 | 2020-03-27 | 中国航发商用航空发动机有限责任公司 | Fretting fatigue surface crack detection method and system |
| CN109507039A (en) * | 2018-10-15 | 2019-03-22 | 西北工业大学 | Temperature Fretting fatigue experimental device and test method based on bending deformation |
| CN110132739A (en) * | 2019-05-24 | 2019-08-16 | 北京航空航天大学 | A kind of fretting fatigue testing normal load loading device and method |
| CN110132739B (en) * | 2019-05-24 | 2020-12-29 | 北京航空航天大学 | Micro fatigue test normal load loading device and method |
| CN110108574A (en) * | 2019-05-27 | 2019-08-09 | 南京工业大学 | A kind of assembled high temperature loading test platform |
| CN110220786A (en) * | 2019-07-04 | 2019-09-10 | 浙江工业大学 | A kind of controllable load normal direction loading device of steady type |
| CN110220786B (en) * | 2019-07-04 | 2024-06-07 | 浙江工业大学 | Stable controllable load normal loading device |
| CN110608963A (en) * | 2019-10-16 | 2019-12-24 | 西南交通大学 | Self-coordination fretting fatigue device capable of accurately measuring displacement and friction force and test method |
| CN110608963B (en) * | 2019-10-16 | 2021-11-09 | 西南交通大学 | Self-coordination fretting fatigue device capable of accurately measuring displacement and friction force and test method |
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Application publication date: 20170222 |