CN107271166A - It is threadedly coupled interface anti-loosening property experimental rig and its detection method - Google Patents
It is threadedly coupled interface anti-loosening property experimental rig and its detection method Download PDFInfo
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Abstract
Interface anti-loosening property experimental rig is threadedly coupled the invention discloses one kind, including base station and the interface module being installed on the base station, tightening system, sensor-based system, vibrational system and fastening system, wherein, interface module includes bolt and the first connected piece, the second connected piece and the nut that are placed on bolt；Tightening system is connected by the head of sleeve and bolt and its output shaft is provided with total torque speed probe；Fastening system is used to the second connected piece being fixed on base station；The output shaft of vibrational system is connected by pull pressure sensor with the power transmission arm of the first connected piece；Sensor-based system includes the fixing device being held on nut and the screw thread torque sensor and axial force transducer that are connected successively with the fixing device, and the axial force transducer is fixed on base station.Threaded connection interface anti-loosening property experimental rig proposed by the present invention, realizes the measurement to actual interface axial force loss amount, fastener bearing-surface coefficient of friction and thread friction coefficient.
Description
Technical field
The present invention relates to fastener testing tool technical field, more particularly to a kind of threaded connection interface anti-loosening property experiment
Device and its detection method.
Background technology
Threaded connection interface is the attachment structure being widely used in mechanical mechanism, mainly by connected piece, fastener and
Associated component is constituted, and because being acted on by alternate load, loosening phenomenon occurs in interface, so as to lose connection function, causes to set
Standby or component failure or destruction, or even there is security incident.The loosening process of interface by loosen mechanism can be divided into material loosen and
Connection loosing.It is that fastener and connected piece come in contact that surface is embedded and local plastic deformation under load effect that material, which loosens,
Cause caused by axial force loss, by certain time, embed and plastic deformation is in stable state, material, which loosens, does not continue to hair
It is raw；When acting on the cross force on connected piece more than the frictional force produced by axial force, Relative sliding will occur, and repeat
The effect of lateral load under, when it is existing a certain critical value is exceeded to slippage when fastener will occur, from phenomenon is loosened, to claim
For connection loosing.When initial axial force is not enough, material loosens and connection loosing can occur simultaneously.
With the further investigation of threaded connection interface anti-loosening property, have to the factor for influenceing anti-loosening property and apparent recognize
Know, axial force, lateral load amplitude and frequency in service load, fastener (bolt, nut, pad, spring washer,
Stop component etc.) quantity, specifications and models, strength grade, surface treatment, coefficient of friction, connected piece material, size, aperture chi
Very little and position, faying face relevant parameter (size, processing mode, surface treatment, coefficient of friction, roughness and flatness), be all
Influence the key factor of interface axial force loss amount and anti-loosening property.
It is simple, pre- still without a form at present because threaded connection interface loosens the complexity of mechanism and influence factor
The axial force loss amount and anti-loosening property of threaded connection interface can be calculated by surveying accurate universal model, and relatively effective method is
The affecting laws of anti-loosening property are studied by oscillation crosswise testing machine.Current oscillation crosswise testing machine can only simulate service load
With the partial parameters of fastener, lack to fastener bearing-surface coefficient of friction, thread friction coefficient in actual interface with being connected
Part material, size, aperture size and position, the Validity Test of faying face relevant parameter and simulation, cause accurately detect spiral shell
The axial force loss amount and anti-loosening property of line connecting interface, can not more be instructed, specification engineering fastener and connected piece in practice
Manufacture, design with assembling.
The content of the invention
It is a primary object of the present invention to provide a kind of threaded connection interface anti-loosening property experimental rig and its detection method,
Aim at the measurement to actual interface axial force loss amount, fastener bearing-surface coefficient of friction and thread friction coefficient.
To achieve the above object, the present invention provide a kind of threaded connection interface anti-loosening property experimental rig, including base station with
And interface module, tightening system, sensor-based system, vibrational system and fastening system on the base station are installed on, wherein,
The interface module includes bolt and the first connected piece, the second connected piece and the nut that are placed on bolt,
First connected piece and the second connected piece and its Complexed Prostate Specific Antigen are consistent with assembling mode with the parameter of actual interface；
The tightening system is connected by the head of sleeve and bolt and its output shaft is provided with total torque speed probe；
The fastening system is used to the second connected piece being fixed on base station；
The output shaft of the vibrational system is connected to drive by pull pressure sensor with the power transmission arm of the first connected piece
First connected piece lateral displacement；
The sensor-based system includes the fixing device that is held on the nut and is connected successively with the fixing device
Screw thread torque sensor and axial force transducer, the axial force transducer are fixed on base station.
Preferably, the tightening system includes the buncher that is fixed on the base station and to be placed on the buncher defeated
Shaft coupling on shaft, one end of the total torque speed probe is connected with shaft coupling, and the other end is fixedly connected with sleeve, should
Sleeve is placed on the head of bolt.
Preferably, gap is provided between the fixing device and the second connected piece.
Preferably, the gap between the fixing device and the second connected piece is (3%~12%) L, and L is bolt nominal
Length.
Preferably, the axial force transducer is fixed on base station by the first pedestal.
Preferably, the screw thread torque sensor is fixedly connected with fixing device, the two ends point of the axial force transducer
It is not fixedly connected with screw thread torque sensor and base station.
Preferably, the base station is provided with the second pedestal, and the second connected piece is fixed on the second base by the fastening system
On seat.
Preferably, the vibrational system is the bobbing machine being fixed on base station.
Preferably, the fastening system is to be detachably connected with the second pedestal.
Present invention further propose that a kind of detection method based on above-mentioned threaded connection interface anti-loosening property experimental rig,
Comprise the following steps：
The first connected piece of many sets and the second connected piece are chosen, and is installed on base station and is applied by tightening system successively
Moment of torsion, removes tightening system, and record total torque, screw thread moment of torsion and axial force in terms of until reaching after predetermined initial axial force
Calculate thread friction coefficient and bearing-surface coefficient of friction；
Pull pressure sensor is connected with the power transmission arm of the first connected piece, the output shaft of vibrational system is controlled in horizontal position
Moved during shifting with predetermined lateral load amplitude, frequency and cycle-index, by analyzing axial force after motion stopping
Change curve, judges whether fastener rotates loosening, and records final residual axial force；
The initial axial force and residual axial force of all first connected pieces and the second connected piece are counted, and calculates axial direction
The maximum of power loss amount；
The anti-loosening property that interface is threadedly coupled under real work load is calculated, i.e., in axial force and the common work of service load
Whether slid with lower first connected piece and the second connected piece.
Threaded connection interface anti-loosening property experimental rig proposed by the present invention, for existing threaded connection interface anti-loosening property
Experimental rig is with inspection optimization method to actual interface axial force loss amount, fastener bearing-surface coefficient of friction, thread friction system
Number lacks Validity Test, simulation and calculating with connected piece material, size, aperture size and position, faying face relevant parameter
Problem, can carry out simulated test to above parameter and service load by the experimental rig of design, be provided for interface anti-loosening property
Accurately, comprehensive basic data, so that the computational methods by setting up science, in engineering, accurately detection threaded connection connects in practice
The anti-loosening property of mouth；On the other hand, designed by multifactorial experiment, the value for changing above parameter carries out simulated test, quantifies
Research work load and affecting laws of the interface parameters to anti-loosening property, comprehensive parameter optimization side is solved by setting up Optimized model
Case, it is accurate instruct, manufacture, design and the assembling of specification engineering fastener and connected piece in practice, lift anti-loosening property, effectively
Solve the limitation of existing anti-loosening property experimental rig and inspection optimization method, it is ensured that be threadedly coupled interface security, reliably transport
OK.
Brief description of the drawings
Fig. 1 is threadedly coupled the structural representation of interface anti-loosening property experimental rig embodiment 1 for the present invention；
Fig. 2 is threadedly coupled the overlooking the structure diagram of interface anti-loosening property experimental rig embodiment 1 for the present invention；
Fig. 3 is threadedly coupled the partial structural diagram of interface anti-loosening property experimental rig embodiment 2 for the present invention；
Fig. 4 is threadedly coupled the partial structural diagram of interface anti-loosening property experimental rig embodiment 3 for the present invention.
In figure, 1. bunchers；2. shaft coupling；3. total torque speed probe；4. sleeve；5. bolt；6-1. embodiments 1
The first connected piece；The power transmission arm of 6-1-1. embodiments 1；The matched clamp of 6-1-2. embodiments 1；The of 7-1. embodiments 1
Two connected pieces；The power transmission arm of 7-1-1. embodiments 1；The matched clamp of 7-1-2. embodiments 1；First quilt of 6-2. embodiments 2
Connector；The power transmission arm of 6-2-1. embodiments 2；The matched clamp of 6-2-2. embodiments 2；The second of 7-2. embodiments 2 is connected
Part；The power transmission arm of 7-2-1. embodiments 2；The matched clamp of 7-2-2. embodiments 2；First connected piece of 6-3. embodiments 3；6-
The power transmission arm of 3-1. embodiments 3；The matched clamp of 6-3-2. embodiments 3；Second connected piece of 7-3. embodiments 3；7-3-1.
The power transmission arm of embodiment 3；The matched clamp of 7-3-2. embodiments 3；8. the second pedestal；9. nut；10. fixing device；11. screw thread
Torque sensor；12. axial force transducer；13. the first pedestal；14. bobbing machine；15. pull pressure sensor；16. base station.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
It should be noted that in the description of the invention, term " transverse direction ", " longitudinal direction ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, is not instruction or implies signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the limit of the present invention
System.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relative importance.
The present invention proposes a kind of threaded connection interface anti-loosening property experimental rig.
Referring to figs. 1 to Fig. 4, in the present embodiment, one kind threaded connection interface anti-loosening property experimental rig, including base station 16 with
And interface module, tightening system, sensor-based system, vibrational system and fastening system on the base station 16 are installed on, wherein,
Interface module includes bolt 5 and the first connected piece, the second connected piece and the nut 9 that are placed on bolt 5, the
One connected piece and the second connected piece and its Complexed Prostate Specific Antigen are consistent with assembling mode with the parameter of actual interface；
Tightening system is connected by sleeve 4 with the head of bolt 5 and its output shaft is provided with total torque speed probe 3
(demand, bolt 5 and the interchanging positions of nut 9 are determined according to test parameters)；
Fastening system is used to the second connected piece being fixed on base station 16；
The output shaft of vibrational system is connected (pressure biography with the power transmission arm of the first connected piece by pull pressure sensor 15
Sensor 15 is connected with the power transmission arm of the first connected piece by matched clamp) to drive the first connected piece lateral displacement；
Sensor-based system includes the fixing device 10 being held on nut 9 and the screw thread being connected successively with the fixing device 10
Torque sensor 11 and axial force transducer 12, the axial force transducer 12 are fixed on base station 16.
Specifically, in the present embodiment, vibrational system is the bobbing machine 14 being fixed on base station 16.Tightening system includes fixing
In the buncher 1 on base station 16 and the shaft coupling 2 being placed on the output shaft of buncher 1, total torque speed probe 3
One end is connected with shaft coupling 2, and the other end is fixedly connected with sleeve 4, and the sleeve 4 is placed on the head of bolt 5.Buncher 1 passes through
The connection of bolt 5 is arranged on base station 16.
Further, gap is provided between the connected piece of fixing device 10 and second, so as to avoid contact with the work for producing power
With and influence the measurement accuracy of screw thread torque sensor 11 and axial force transducer 12, realize thread friction coefficient and bearing-surface
The accurate measurement of coefficient of friction.Specifically, the gap between the connected piece of fixing device 10 and second is (3%~12%) L, L
For bolt nominal length.
In the present embodiment, axial force transducer 12 is fixed on base station 16 by the first pedestal 13.Screw thread torque sensor
11 are fixedly connected with fixing device 10, and the two ends of axial force transducer 12 are fixed with screw thread torque sensor 11 and base station 16 respectively
Connection.Base station 16 is provided with the second pedestal 8, and the second connected piece is fixed on the second pedestal 8 (by supporting folder by fastening system
Tool fixes the power transmission arm of the second connected piece).
Further, fastening system is to be detachably connected with the second pedestal 8.First connected piece and the second connected piece are deposited
In sizes type, fastening system can be provided with many sets according to the second different connected pieces, so that convenient according to different
Second connected piece selects suitable fastening system.
The principle and the course of work of this threaded connection interface anti-loosening property experimental rig are as follows：
Tighten during tested fastener, buncher 1 drives shaft coupling 2, total torque speed probe 3, sleeve 4 to spiral shell
Bolt 5 applies moment of torsion, and bolt 5 and nut 9 produce axial force, and nut 9 pulls fixing device 10, screw thread torque sensor 11, axial direction
Force snesor 12, the moment of torsion (driving the moment of torsion that nut 9 is produced by the thread friction moment of torsion of bolt 5) that nut 9 is produced drives nut 9 to consolidate
Determine device 10 and screw thread torque sensor 11, while the supporting surface of bolt 5 pulls the first connected piece, make the knot of two connected pieces
Conjunction face produces axial force, equal with the measured value of axial force transducer 12；Total torque speed probe 3, screw thread in the process
Torque sensor 11 and axial force transducer 12 test total torque and tighten rotating speed, screw thread moment of torsion and axial force respectively；By total
Moment of torsion can calculate the thread friction coefficient and seating surface coefficient of friction of bolt 5 with screw thread moment of torsion.Due to the same (spiral shell of batch bolt 5
There is fluctuation in female 9) coefficient of friction, and same bolt 5 (nut 9) is (secondary or repeatedly tighten, difference under different tight conditions
Connected piece surface parameter) coefficient of friction can also change, this experimental rig by simulating actual connected piece parameter,
In the case of not changing tight condition, the coefficient of friction of tested fastener bearing-surface and screw thread can be accurately calculated, and can quantify to grind
Study carefully the affecting laws of coefficient of friction docking port anti-loosening property, effectively solving existing oscillation crosswise testing machine can not accurate testing friction
The defect of coefficient.
Before vibration test, by set the power output parameter value of bobbing machine 14 reach predetermined lateral load amplitude,
Frequency and cycle-index；In vibration processes, bobbing machine 14 drives pull pressure sensor 15, the first connected piece back and forth to be transported
It is dynamic, pull pressure sensor 15 and the real-time testing lateral load of axial force transducer 12 and axial force；After vibration terminates, record
Final residual axial force, is calculated and the difference of preliminary examination axial force is axial force loss amount Δ F.On the one hand, the present invention is directed to
Existing threaded connection interface anti-loosening property experimental rig and inspection optimization method is to 5, actual interface axial force loss amount, bolt
Bearing surface coefficient of friction, thread friction coefficient and connected piece material, size, aperture size and position, faying face relevant parameter lack
The problem of weary Validity Test, simulation and calculating, above parameter and service load can be simulated by the experimental rig of design
Experiment, accurate, comprehensive basic data is provided for interface anti-loosening property, so that the computational methods by setting up science, in engineering
Accurate detection is threadedly coupled the anti-loosening property of interface in practice；On the other hand, designed by multifactorial experiment, change above parameter
Value carry out simulated test, quantitative research service load and interface parameters are excellent by setting up to the affecting laws of anti-loosening property
Change the comprehensive parameter optimization scheme of model solution, it is accurate instruct, manufacture, the design of specification engineering fastener and connected piece in practice
With assembling, anti-loosening property is lifted, the limitation of existing anti-loosening property experimental rig and inspection optimization method is effectively solved, it is ensured that spiral shell
Line connecting interface is reliably and securely run.
It is specific as follows when using this threaded connection interface anti-loosening property experimental rig.
(1) parameter attribute for confirming, testing before the installation of actual thread connecting interface parts, including fastener (bolt 5,
Nut 9, pad, spring washer, stop component etc.) quantity, specifications and models, strength grade, surface treatment, coefficient of friction, two
Material, size, aperture size and the position of connected piece, faying face relevant parameter (size, processing mode, surface treatment, friction
Coefficient, roughness and flatness)；
(2) determine that test load, including initial axial force, lateral are carried according to threaded connection interface real work load
Lotus amplitude, frequency and cycle-index；
Wherein, the test value F of initial axial forcev0Connected piece in real work load is taken to bear axial tension WvAxle afterwards
Xiang Li, calculation formula is as follows：
In formula：Fv0--- the test value of initial axial force,
F0--- the initial axial force in real work load,
KB--- the tensible rigidity of bolt 5, obtained by the elasticity modulus of materials of bolt 5 and Size calculation,
KC--- connected piece compression stiffness, obtained by connected piece elasticity modulus of materials and Size calculation,
Wv--- the axial tension in real work load, the maximum of statistical value is taken,
(3) threaded connection interface test specimen is attached to experimental rig, installation process is：The power transmission arm of second connected piece leads to
The matched clamp for crossing its suitable dimensions of selection is fastened on the second pedestal 8；By the first connected piece and the second connected piece
Pre-screwing is carried out by bolt 5 and nut 9；The selection fixing device 10 supporting with the model specification of nut 9 (ensures that nut 9 is not sent out
Raw rotation), it is assembled into a sensor-based system with screw thread torque sensor 11, axial force transducer 12；Sensor-based system is fastened on
On first pedestal 13；Tightening system (buncher 1, shaft coupling 2, total torque speed probe 3 and sleeve 4) is adjusted in base station 16
On position, make the grip bolt 5 of sleeve 4, then connected by bolt 5 and buncher 1 is fixed on base station 16, start apply
Moment of torsion；
(4) during moment of torsion applies, it can be sensed by total torque speed probe 3, screw thread torque sensor 11, axial force
Device 12 tests total torque and rotating speed, screw thread moment of torsion and axial force respectively, when axial force reaches predetermined value Fv0When stop apply moment of torsion,
Tightening system is removed, passes through final total torque T and screw thread torque TsCalculate the thread friction coefficient u of bolt 5sRubbed with bearing-surface
Wipe coefficient uw, calculation formula is as follows：
In formula：us--- thread friction coefficient,
Ts--- screw thread moment of torsion,
d2--- the pitch diameter of thread,
Fv0--- initial axial force,
P --- pitch,
α --- half of thread angle or flank angle,
uw--- bearing-surface coefficient of friction,
T --- total torque,
dw--- bearing-surface equivalent friction diameter；
(5) pull pressure sensor 15 is connected with the power transmission arm of the first connected piece by matched clamp, pressure sensing
The other end of device 15 is connected with bobbing machine 14, and bobbing machine 14 is arranged on base station 16, and the service load determined according to step (2) is carried out
Experiment, by setting the power output parameter of bobbing machine 14 to reach predetermined lateral load amplitude, frequency and cycle-index.
In vibration processes, pull pressure sensor 15, the real-time testing lateral load of axial force transducer 12, the value of axial force；Vibration
After stopping, by analyzing axial force change curve, judge fastener whether rotate loosening, i.e. axial force it is whether quick under
Drop, or judge whether axial force change curve tends towards stability, record final residual axial force；
(6) dismounting the first connected piece and the second connected piece, tests and records rubbing for connected piece faying face after experiment
Wipe coefficient；
(7) the initial axial force and residual axial force of all first connected pieces and the second connected piece are counted, and is calculated
Axial force loss amount Δ F maximum；
(8) anti-loosening property that interface is threadedly coupled under real work load, i.e. being total in axial force and service load are calculated
Whether connected piece slides under same-action, and calculation formula is as follows, and result of calculation is more than 0 explanation and do not slid：
In formula：F0--- the initial axial force in real work load, the minimum value of statistical value is taken,
KB--- the tensible rigidity of bolt 5, obtained by the elasticity modulus of materials of bolt 5 and Size calculation,
KC--- connected piece compression stiffness, obtained by connected piece elasticity modulus of materials and Size calculation,
Wv--- axial tension, the maximum of statistical value is taken in real work load,
Δ F --- axial force loss amount, takes the maximum of test value,
uCS--- connected piece faying face coefficient of friction,
wh--- the cross shear in real work load, take the maximum of statistical value；
Connected piece faying face coefficient of friction uCSDetermined by friction coefficient tester, coefficient of friction can be because of knot before and after experiment
Conjunction face is embedded and the factor such as plastic deformation is varied from, and the smaller value of the two is taken during calculating；
(9) anti-loosening property calculated by step (8), binding tests data and actual interface parameter state, quantify detection
Interface parameters is threadedly coupled the anti-loosening property of interface under real work load；
(10) designed by multifactorial experiment, research work load and affecting laws of the interface parameters to anti-loosening property lead to
Cross and set up Optimized model and solve comprehensive parameter optimization scheme, instruct, specification engineering in practice the manufacture of fastener and connected piece,
Design and assembling.
Threaded connection interface anti-loosening property experimental rig proposed by the present invention, for existing threaded connection interface anti-loosening property
Experimental rig is with inspection optimization method to actual interface axial force loss amount, the bearing-surface coefficient of friction of bolt 5, thread friction coefficient
Lack asking for Validity Test, simulation and calculating with connected piece material, size, aperture size and position, faying face relevant parameter
Topic, can carry out simulated test to above parameter and service load by the experimental rig of design, standard is provided for interface anti-loosening property
Really, comprehensive basic data, so that the computational methods by setting up science, in engineering, accurately detection is threadedly coupled interface in practice
Anti-loosening property；On the other hand, designed by multifactorial experiment, the value for changing above parameter carries out simulated test, quantifies to grind
Study carefully service load and affecting laws of the interface parameters to anti-loosening property, comprehensive parameter optimization side is solved by setting up Optimized model
Case, it is accurate instruct, manufacture, design and the assembling of specification engineering fastener and connected piece in practice, lift anti-loosening property, effectively
Solve the limitation of existing anti-loosening property experimental rig and inspection optimization method, it is ensured that be threadedly coupled interface security, reliably transport
OK.
Present invention further propose that a kind of detection method for being threadedly coupled interface anti-loosening property experimental rig.
In this preferred embodiment, a kind of detection method based on above-mentioned threaded connection interface anti-loosening property experimental rig,
Comprise the following steps：
The first connected piece of many sets and the second connected piece are chosen, and is installed on base station and is applied by tightening system successively
Moment of torsion, removes tightening system, and record total torque, screw thread moment of torsion and axial force in terms of until reaching after predetermined initial axial force
Calculate thread friction coefficient and bearing-surface coefficient of friction；
Pull pressure sensor is connected with the power transmission arm of the first connected piece, the output shaft of vibrational system is controlled in horizontal position
Moved during shifting with predetermined lateral load amplitude, frequency and cycle-index, by analyzing axial force after motion stopping
Change curve, judges whether fastener rotates loosening, and records final residual axial force；
The initial axial force and residual axial force of all first connected pieces and the second connected piece are counted, and calculates axial direction
The maximum of power loss amount；
The anti-loosening property that interface is threadedly coupled under real work load is calculated, i.e., in axial force and the common work of service load
Whether slid with lower first connected piece and the second connected piece.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure transformation that bright specification and accompanying drawing content are made, or other related technical fields are directly or indirectly used in,
Similarly it is included within the scope of the present invention.
Claims (10)
1. one kind threaded connection interface anti-loosening property experimental rig, it is characterised in that including base station and be installed on the base station
Interface module, tightening system, sensor-based system, vibrational system and fastening system, wherein,
The interface module includes bolt and the first connected piece, the second connected piece and the nut that are placed on bolt, first
Connected piece and the second connected piece and its Complexed Prostate Specific Antigen are consistent with assembling mode with the parameter of actual interface；
The tightening system is connected by the head of sleeve and bolt and its output shaft is provided with total torque speed probe；
The fastening system is used to the second connected piece being fixed on base station；
The output shaft of the vibrational system is connected to drive first by pull pressure sensor with the power transmission arm of the first connected piece
Connected piece lateral displacement；
The sensor-based system includes the fixing device being held on the nut and the screw thread being connected successively with the fixing device
Torque sensor and axial force transducer, the axial force transducer are fixed on base station.
2. interface anti-loosening property experimental rig is threadedly coupled as claimed in claim 1, it is characterised in that the tightening system bag
Include the shaft coupling for being fixed on the buncher on the base station and being placed on the buncher output shaft, the total torque rotating speed
One end of sensor is connected with shaft coupling, and the other end is fixedly connected with sleeve, and the sleeve is placed on the head of bolt.
3. as claimed in claim 1 threaded connection interface anti-loosening property experimental rig, it is characterised in that the fixing device with
Gap is provided between second connected piece.
4. as claimed in claim 3 threaded connection interface anti-loosening property experimental rig, it is characterised in that the fixing device with
Gap between second connected piece is (3%~12%) L, and L is bolt nominal length.
5. interface anti-loosening property experimental rig is threadedly coupled as claimed in claim 1, it is characterised in that the axial force sensing
Device is fixed on base station by the first pedestal.
6. interface anti-loosening property experimental rig is threadedly coupled as claimed in claim 5, it is characterised in that the screw thread moment of torsion is passed
Sensor is fixedly connected with fixing device, and the two ends of the axial force transducer are fixed with screw thread torque sensor and base station respectively to be connected
Connect.
7. interface anti-loosening property experimental rig is threadedly coupled as claimed in claim 1, it is characterised in that the base station is provided with
Second connected piece is fixed on the second pedestal by the second pedestal, the fastening system.
8. threaded connection interface anti-loosening property experimental rig as claimed in claim 1, it is characterised in that the vibrational system is
The bobbing machine being fixed on base station.
9. as claimed in claim 7 threaded connection interface anti-loosening property experimental rig, it is characterised in that the fastening system with
Second pedestal is to be detachably connected.
10. a kind of detection of the threaded connection interface anti-loosening property experimental rig based on described in any one in claim 1 to 9
Method, it is characterised in that comprise the following steps：
The first connected piece of many sets and the second connected piece are chosen, and is installed on successively on base station by tightening system application torsion
Square, removes tightening system, and record total torque, screw thread moment of torsion and axial force to calculate until reaching after predetermined initial axial force
Thread friction coefficient and bearing-surface coefficient of friction；
Pull pressure sensor is connected with the power transmission arm of the first connected piece, the output shaft of vibrational system is controlled in lateral displacement mistake
Moved in journey with predetermined lateral load amplitude, frequency and cycle-index, motion is changed after stopping by analyzing axial force
Curve, judges whether fastener rotates loosening, and records final residual axial force；
The initial axial force and residual axial force of all first connected pieces and the second connected piece are counted, and calculates axial force damage
The maximum of vector；
The anti-loosening property that interface is threadedly coupled under real work load is calculated, i.e., under axial force and the collective effect of service load
Whether the first connected piece and the second connected piece slide.
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| CN108444687A (en) * | 2018-03-15 | 2018-08-24 | 大连理工大学 | A kind of more bolts of ring flange stretch bending Combined Loading loosen testing machine |
| CN108956077A (en) * | 2018-07-23 | 2018-12-07 | 上汽通用五菱汽车股份有限公司 | Multi-functional screw connection structure pilot system and performance optimization method |
| CN109506903A (en) * | 2018-05-25 | 2019-03-22 | 蔚来汽车有限公司 | Tighten test equipment and test method |
| CN109781398A (en) * | 2019-02-20 | 2019-05-21 | 陕西科技大学 | A kind of screw connection anti-loose test measurement device and method |
| CN110715798A (en) * | 2019-09-25 | 2020-01-21 | 上海发电设备成套设计研究院有限责任公司 | Test device and test method for measuring self-loosening of bolt |
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| CN110926930A (en) * | 2019-12-25 | 2020-03-27 | 中国航空工业集团公司西安飞机设计研究所 | Torsion-tension relation measuring device and method for aircraft stud structure |
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