CN103954419B - A kind of threaded fastener transverse vibration testing device and test method - Google Patents
A kind of threaded fastener transverse vibration testing device and test method Download PDFInfo
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- CN103954419B CN103954419B CN201410177952.0A CN201410177952A CN103954419B CN 103954419 B CN103954419 B CN 103954419B CN 201410177952 A CN201410177952 A CN 201410177952A CN 103954419 B CN103954419 B CN 103954419B
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Abstract
The invention discloses a kind of threaded fastener transverse vibration testing device and test method, including oscillation crosswise platform, drive system, chucking appliance system, installation pedestal and measurement apparatus；Drive system one end is bolted on oscillation crosswise platform, and the other end is fixed on the movable platen in chucking appliance system；The fixed pedestal of chucking appliance system is fastened by T-slot with installing pedestal；Drive system is provided with pull pressure sensor, and chucking appliance system is provided with washer type force transducer.The present invention can simulate dither, realize electrodeless amplitude modulation, can the cross shear of threaded fastener and axial pre tightening force change in monitoring vibration process in real time, it is possible to single bolt and bolt group (linear distribution, distributed rectangular and circle distribution) locking characteristic to different size are tested.Analyze the anti-loosening property of various threaded fastener for engineers and technicians, the effectiveness assessing various anti-loose method provides basic platform and data support.
Description
Technical field
The invention belongs to transverse vibration testing device field, be specifically related to a kind of threaded fastener transverse vibration testing device and test method.
Background technology
Threaded have be easily obtained bigger attachment force, it is simple to disassembly and maintenance are maintained, cheap, the advantages such as interchangeability is strong, it has also become apply the most generally in frame for movement assembling, connected mode the most widely, and threaded fastener also becomes requisite machine components.Most of threaded performances depend on size and the stability of its axial pre tightening force.But, when threaded connector is subject to extraneous load disturbance, particularly during transverse-vibration dynamic load effect, threaded connector easily gets loose inefficacy, and threaded power is gradually lowered and even completely loses, and this can frequently result in very serious personal safety and property loss problem.Therefore, threaded fastener is before engineer applied, it is necessary to it is carried out anti-loosening property test and assessment.
The test method being presently used for evaluating threaded fastener anti-loosening property mainly has three kinds: foundation bolt test method(s), sleeve side knock method and oscillation crosswise test method(s).Foundation bolt test method(s) can not obtain desirable test data because of it, and comparability is poor, and does not have standardization, now substantially need not；Sleeve side knock method is owing to load mode and vibration, impact condition are closer to the real use state of various securing members, it is formulated to China's GJB (GJB715.3A-2002), domestic air mail aerospace system mainly adopts the method, but the method can not measure the change of threaded fastener clamping force；Oscillation crosswise method principle originates from Germany's Junker testing machine, the method can accurately measure securing member change of pretightning force in vibration test process, provide the graph of relation of pretightning force and vibration number (or time), China has issued and has implemented national standard (GB-T10431-2008), the method is widely used at home, particularly in industries such as automobile, railway and pipeline connections.
Wherein, according to national standard (GB-T10431-2008), the oscillation crosswise test method(s) being most widely used, securing member oscillation crosswise testing machine carries out.Oscillation crosswise test realizes the adjustment of frequency of vibration by changing eccentric rotating speed, is realized the change of amplitude size by eccentric adjustment amount, the slider-crank mechanism of its vibration source substantially a kind of machinery.This kind of structure causes that oscillation crosswise testing machine structure is complicated, and operating frequency is relatively low, and amplitude and acceleration of vibration adjust difficulty.Additionally, its test fixture is only applicable to single screw retention compliance test result, it is impossible to carrying out the experimental test of bolt group, test system also cannot detect the change of bolt test specimen cross shear in real time.Therefore, for the defect of prior art, it is necessary to propose a kind of threaded fastener transverse vibration testing device, its frequency of vibration and amplitude facilitate regulable control, and can realize the real-time monitoring of the locking characteristic test of bolt group and cross shear.
Summary of the invention
It is an object of the invention to provide a kind of threaded fastener transverse vibration testing device and test method, what this assay device was capable of frequency of vibration and amplitude facilitates regulable control, the test of the locking characteristic of bolt group, it is possible to the change of monitoring bolt axial pre tightening force and cross shear in real time.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of threaded fastener transverse vibration testing device, including oscillation crosswise platform, drive system and installation pedestal；Oscillation crosswise platform is adjacently positioned on the ground with installation pedestal, and the bottom installing pedestal is provided with the adjustment cushion block for adjusting height；The top installing pedestal is provided with for installing tested bolt and the chucking appliance system of tested nut；One end of drive system is connected with oscillation crosswise platform, and the other end is connected with chucking appliance system；The vibration of vibration source is passed to the tested bolt on chucking appliance system and tested nut by oscillation crosswise platform by drive system, and when oscillation crosswise Platform Vibration, drive system can drive chucking appliance system to do horizontal reciprocating movement.
Described chucking appliance system includes for laying tested bolt and the movable platen of tested nut；Movable platen is arranged on fixed pedestal, and fixed pedestal is fastened on the upper surface installing pedestal.
Described movable platen offer some for installing tested bolt or the bellmouth of tested nut；Board-like roller chain is installed between movable platen and fixed pedestal, and connects by testing bolt and nut；Fixed pedestal offers the rectangular opening corresponding with bellmouth, fixed pedestal be arranged below power transmission sleeve；Power transmission sleeve lower end is the disc for mounting gasket, and upper end is the rectangular head that through hole or screwed hole are offered in inside, and the rectangular head of its upper end is deep in the rectangular opening of fixed pedestal；Being provided with the two sensors packing ring stacked on the disk of power transmission sleeve lower end, be provided with washer type force transducer between two sensors packing ring, washer type force transducer is sleeved on power transmission sleeve；When tested bolt or tested nut screwing clamping, the sensor packing ring on washer type force transducer top is in close contact with the bottom of fixed pedestal, and the upper surface of the sensor packing ring of washer type force transducer bottom and power transmission sleeve bottom disk is in close contact.
Being provided with circular cone in described bellmouth, the internal diameter of circular cone, be more than or equal to the external diameter of tested bolt, circular cone all offers pin hole, and is connected by pin and movable platen are fixing；Bellmouth includes the bellmouth for testing tested bolt and for testing the bellmouth of tested nut；
Be used for testing the bellmouth of tested bolt installs tested bolt time, tested bolt is installed from top to bottom, and the nut of tested bolt is arranged with compress gasket, and compress gasket is arranged with bolt and nut pad；The rectangular head of power transmission sleeve upper end offers the screwed hole matched with the screw thread on tested bolt；
Be used for testing the bellmouth of tested nut installs tested bolt time, tested bolt is installed from bottom to top, the rectangular head of power transmission sleeve upper end offers internal diameter be more than or equal to the through hole of screw diameter on tested bolt；Tested nut sleeve is contained in tested bolt and passes on the screw rod of movable platen, and is arranged with compress gasket on tested nut, and compress gasket is arranged with bolt and nut pad.
The center of described movable platen offers a bellmouth, and uniformly offers 8 bellmouths around center circumferential direction；The upper surface of fixed pedestal offers some row rectangular channel for mounting plate type roller chain；Pedestal is installed by being opened in T-slot and the fixed pedestal fastening of its upper surface；Installing pedestal is cast iron T-slot platform.
Described oscillation crosswise platform includes vibration platen pedestal, and vibration platen pedestal is connected to horizontal vibration platform, and horizontal vibration platform is connected with vibration platen pedestal by ball chain；Horizontal vibration platform is fixing with the outfan of vibration source to be connected；One end of drive system is fixed on horizontal vibration platform.
Described vibration source adopts excitation coil structure, and vibration source outfan and horizontal vibration platform are fastened by bolts, and horizontal vibration platform offers the many groups screwed hole for connecting drive system.
Retainer that described drive system includes being fixed on horizontal vibration countertop and fix the T-shaped driving member being connected with movable platen；Retainer is installed with cylinder type driving member, and cylinder type driving member is horizontally disposed with, and is provided with pull pressure sensor between cylinder type driving member and T-shaped driving member, and the two ends of pull pressure sensor are connected with cylinder type driving member and T-shaped driving member each through sensor flange.
Also include charge amplifier, data actuation and data processing module；The signal input part of charge amplifier is connected with the signal output part of pull pressure sensor and washer type force transducer respectively, the signal output part of charge amplifier is connected with the signal input part of data actuation, and the signal output part of data actuation is connected with data processing module.
A kind of threaded fastener oscillation crosswise test method, comprises the following steps:
1) according to the demarcation of dispatching from the factory of pull pressure sensor and washer type force transducer, range and sensitivity, the signal conversion ratio of setting data acquisition system of pull pressure sensor and washer type force transducer is set；
2) frequency of vibration of vibration mechine, amplitude, acceleration of vibration and operation time parameters are set, movable platen is installed acceleration transducer；
3) choose the circular cone matched with tested bolt external diameter, circular cone is installed in the bellmouth of movable platen；
Test in the bellmouth of tested bolt being used for, successively pin, bolt and nut pad, compress gasket and tested bolt are installed on circular cone；
Test in the bellmouth of tested nut being used for, successively pin, bolt and nut pad, compress gasket, tested bolt and tested nut are installed on circular cone；
4) choose the power transmission sleeve matched with tested bolt external diameter, successively sensor pad, washer type force transducer are arranged on power transmission sleeve, then by its integral installation in the rectangular opening of fixed pedestal, tentatively tighten tested threaded fastener；
5) tighten tested bolt and tested nut to target torque value by torque wrench, by the reading of data collecting system record washer type force transducer, after its indicating value is stable, record this value；
6) open vibration mechine, shut down when being lost to predetermined value to clamping force, record drive system cross shear and tested bolt or tested nut axial pre tightening force versus time curve；
7) step 2 is repeated)～6), change tested bolt or tested nut, circular cone and power transmission sleeve, the anti-loosening property of threaded fastener under dissimilar and structure, different screwing force, different frequency and various amplitude is tested and assessed.
Compared with prior art, the method have the advantages that
Threaded fastener transverse vibration testing device of the present invention, pedestal is installed for installing tested bolt and the chucking appliance system of tested nut installing, and by drive system, oscillation crosswise platform is connected with chucking appliance system, the vibration of vibration source is passed to the tested bolt on chucking appliance system and tested nut, when oscillation crosswise Platform Vibration, drive system can drive chucking appliance system to do horizontal reciprocating movement, it is achieved that the real-time monitoring of the locking characteristic test of bolt group and cross shear.The present invention is the anti-loosening property that engineers and technicians analyze various threaded fastener, and effectiveness and the assembly connection process optimization of assessing various anti-loose method provide basic platform.
Further, vibration source of the present invention adopts excitation coil structure, it may be achieved dither, electrodeless amplitude modulation and big acceleration of vibration.
Further, present clip system adopts center and 8 bellmouth designs of circumference, it may be achieved the locking characteristic test of single bolt and bolt group (linear distribution, distributed rectangular and circle distribution).
Further, the pull pressure sensor installed in drive system of the present invention, the washer type force transducer of suit on threaded fastener, it may be achieved the real-time monitoring of cross shear and axial pre tightening force in vibration processes.
Threaded fastener oscillation crosswise test method of the present invention, cross shear is vibrated by pull pressure sensor collection, threaded fastener clamping force is gathered by washer type force transducer, by controlling system log (SYSLOG) cross shear and clamping force versus time curve, analyze clamping force vibration number or decline value of clamping force when reaching certain vibration number when being lost to predetermined value, thus evaluating the anti-loosing effect of various threaded fastener.This test method is easy and simple to handle, and principle is simple, it is easy to realize, under the cooperation of assay device, it is possible to the anti-loosening property evaluating various threaded fastener for engineers and technicians provides basic data support.
Accompanying drawing explanation
Fig. 1 is that the present invention is integrally-built waits axis side view；
Fig. 2 is drive system profile of the present invention；
Fig. 3 is the sectional view of present clip system；
Fig. 4 is the sectional view of bolt test fixture of the present invention；
Fig. 5 is the sectional view of nut test fixture of the present invention；
Fig. 6 is the axis side view such as grade of movable platen of the present invention；
Fig. 7 is the axis side view such as grade of power transmission sleeve of the present invention；
Fig. 8 is the axis side view such as grade of fixed pedestal of the present invention.
Wherein, 1 is vibration platen pedestal；2 is horizontal vibration platform；3 is retainer；4 is cylinder type driving member；5 is sensor flange；6 is pull pressure sensor；7 is T-shaped driving member；8 is movable platen；9 is tested bolt；10 is tested nut；11 is compress gasket；12 is bolt and nut pad；13 is circular cone；14 is board-like roller chain；15 is pin；16 is sensor pad；17 is washer type force transducer；18 is power transmission sleeve；19 is fixed pedestal；20 for installing pedestal；21 for adjusting parallels.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 1 to Fig. 8, threaded fastener transverse vibration testing device of the present invention, including oscillation crosswise platform, drive system, chucking appliance system, installation pedestal and measurement apparatus；Oscillation crosswise platform includes vibration platen pedestal 1, horizontal vibration platform 2 and vibration source, vibration source adopts magnet exciting coil, vibration source outfan and horizontal vibration platform 2 are fastened by bolts, horizontal vibration platform 2 is connected with vibration platen pedestal 1 by ball chain, and horizontal vibration platform offers the many groups screwed hole for connecting drive system；Drive system includes retainer 3, cylinder type driving member 4, sensor flange 5, pull pressure sensor 6 and T-shaped driving member 7, retainer 3 is bolted on horizontal vibration platform 2, cylinder type driving member 4 one end is fastened by bolts on retainer 3, one end is fastened on left sensor flange 5, and pull pressure sensor 6 is connected with cylinder type driving member 4 and T-shaped driving member 7 by sensor flange 5；Chucking appliance system includes movable platen 8, tested bolt 9, tested nut 10, compress gasket 11, bolt and nut pad 12, circular cone 13, board-like roller chain 14, pin 15, sensor pad 16, washer type force transducer 17, power transmission sleeve 18 and fixed pedestal 19, movable platen 8 is provided centrally with bellmouth, and uniform 8 bellmouth it is circumferentially provided with around center, circular cone is provided with pin hole, power transmission sleeve 18 one end is disc, one end is set to rectangle, power transmission sleeve 18 is internally provided with screwed hole, fixed pedestal 19 upper surface is provided with 7 row rectangular openings, for mounting plate type roller chain 14, lower surface is provided with 8 rectangular openings, for installing the rectangular head of power transmission sleeve 18, movable platen 8 is connected with the T-shaped driving member 7 of drive system by bolt, fixed pedestal 19 is fastened by T-slot with installing pedestal 20, mounting plate type roller chain 14 between movable platen 8 and fixed pedestal 19, and connect by testing bolt 9 or nut 10, washer type force transducer 17 is arranged on power transmission sleeve 18 as a connected piece part；Measurement apparatus includes pull pressure sensor 6, sensor flange 5, washer type force transducer 17, sensor pad 16, charge amplifier and data actuation, pull pressure sensor 6 is arranged in drive system, it is connected with cylinder type driving member 4 and T-shaped driving member 7 by sensor flange 5, washer type force transducer 17 is sleeved on the power transmission sleeve 18 of chucking appliance system, pull pressure sensor 6 and washer type force transducer 17 export signal and access charge amplifier, are connected with data acquisition and data processing module by charge amplifier.
The invention also discloses a kind of based on the test method of threaded fastener transverse vibration testing device described in claim 4, it is characterised in that comprise the following steps:
1) according to the demarcation of dispatching from the factory of pull pressure sensor and washer type force transducer, range and sensitivity, the signal conversion ratio of setting data acquisition system of pull pressure sensor and washer type force transducer is set；
2) frequency of vibration of vibration mechine, amplitude, acceleration of vibration and operation time parameters are set, movable platen 8 is installed acceleration transducer；
3) choose the circular cone 13 matched with tested bolt 9 external diameter, circular cone 13 is installed in the bellmouth of movable platen 8；
Test in the bellmouth of tested bolt 9 being used for, successively pin 15, bolt and nut pad 12, compress gasket 11 and tested bolt 9 are installed on circular cone 13；
Test in the bellmouth of tested nut 10 being used for, successively pin 15, bolt and nut pad 12, compress gasket 11, tested bolt 9 and tested nut 10 are installed on circular cone 13；
4) choose the power transmission sleeve 18 matched with tested bolt 9 external diameter, successively sensor pad 16, washer type force transducer 17 are arranged on power transmission sleeve 18, then by its integral installation in the rectangular opening of fixed pedestal 19, tentatively tighten tested threaded fastener 9；
5) tighten tested bolt 9 and tested nut 10 to target torque value by torque wrench, by the reading of data collecting system record washer type force transducer 17, after its indicating value is stable, record this value；
6) open vibration mechine, shut down when being lost to predetermined value to clamping force or reach certain vibration number, record drive system cross shear and tested bolt 9 or tested nut 10 axial pre tightening force versus time curve；
7) step 2 is repeated)～6), change tested bolt 9 or tested nut 10, circular cone 13 and power transmission sleeve 18, the anti-loosening property of threaded fastener under dissimilar and structure, different screwing force, different frequency and various amplitude is tested and assessed.
Principles of the invention and work process:
As it is shown in figure 1, threaded fastener transverse vibration testing device of the present invention, including: oscillation crosswise platform, drive system, chucking appliance system, installation pedestal and measurement apparatus.Drive system one end is bolted on oscillation crosswise platform 3, and the other end is fixed on the movable platen 8 in chucking appliance system；The fixed pedestal 19 of chucking appliance system is fastened by T-slot with installing pedestal 20；Drive system is provided with pull pressure sensor 6, and chucking appliance system is provided with washer type force transducer 17；When oscillation crosswise Platform Vibration, drive system drives the movable platen in chucking appliance system to do horizontal reciprocating movement.
As shown in Figure 2, drive system includes retainer 3, cylinder type driving member 4, sensor flange 5, pull pressure sensor 6 and T-shaped driving member 7, retainer 3 is bolted on horizontal vibration platform 2, cylinder type driving member 4 one end is fastened by bolts on retainer 3, one end is fastened on left sensor flange 5, and pull pressure sensor 6 is connected with cylinder type driving member 4 and T-shaped driving member 7 by sensor flange 5.
As shown in Figure 3, chucking appliance system includes movable platen 8, tested bolt 9, tested nut 10, compress gasket 11, bolt and nut pad 12, circular cone 13, board-like roller chain 14, pin 15, sensor pad 16, washer type force transducer 17, power transmission sleeve 18 and fixed pedestal 19, movable platen 8 is connected with the T-shaped driving member 7 of drive system by bolt, fixed pedestal 19 is fastened by T-slot with installing pedestal 20, mounting plate type roller chain 14 between movable platen 8 and fixed pedestal 19, and connect by testing bolt 9 or nut 10, washer type force transducer 17 is arranged on power transmission sleeve 18 as a connected piece part.
As shown in Figure 4, in chucking appliance system, bolt test fixture includes: movable platen 8, tested bolt 9, compress gasket 11, bolt and nut pad 12, circular cone 13, board-like roller chain 14, pin 15, sensor pad 16, washer type force transducer 17, power transmission sleeve 18 and fixed pedestal 19, now power transmission sleeve 18 rectangular head is internal is screwed hole, tested bolt 9 is installed from top to bottom, is fastened in power transmission sleeve 18.
As shown in Figure 5, in chucking appliance system, nut test fixture includes: movable platen 8, bolt 9, tested nut 10, compress gasket 11, bolt and nut pad 12, circular cone 13, board-like roller chain 14, pin 15, sensor pad 16, washer type force transducer 17, power transmission sleeve 18 and fixed pedestal 19, now power transmission sleeve 18 rectangular head is internal is unthreaded hole, bolt 9 is installed from bottom to top, by tightening tested nut 10 imposed load.
As shown in Figure 6, movable platen 8 is provided centrally with 1 bellmouth, is provided with uniform 8 bellmouth around center circumferential direction, and each bellmouth side is provided with pin hole, is circumferentially provided with four screwed holes.
As it is shown in fig. 7, power transmission sleeve 18 one end is disc, centre is cylindrical, and one end is set to rectangle, and disc is provided with washer type force transducer 17, and rectangular head coordinates with fixed pedestal 19 square hole, stops power transmission sleeve 18 to rotate；It is unthreaded hole that power transmission sleeve 18 inside arranges bottom, and top is screwed hole, and screwed hole is used for tightening tested bolt.
As shown in Figure 8, fixed pedestal 19 upper surface is provided with 7 row rectangular openings, and for mounting plate type roller chain 14, lower surface is provided with 8 rectangular openings, and for installing the rectangular head of power transmission sleeve 18, fixed pedestal 19 is fastened by T-slot with installing pedestal 20.
Measurement apparatus includes pull pressure sensor 6, sensor flange 5, washer type force transducer 17, sensor pad 16, charge amplifier and data actuation, pull pressure sensor 6 is arranged in drive system, it is connected with cylinder type driving member 4 and T-shaped driving member 7 by sensor flange 5, washer type force transducer 17 is sleeved on the power transmission sleeve 18 of chucking appliance system, pull pressure sensor 6 and washer type force transducer 17 export signal and access charge amplifier, are connected with data acquisition and data processing module by charge amplifier.
When adopting the present invention to carry out the test of bolt oscillation crosswise, specific implementation process comprises the following steps:
Dispatch from the factory demarcations according to force transducer, setting force transducer range and sensitivity, the signal conversion ratio of setting data acquisition system；
Vibration mechine basic parameter is set, such as frequency of vibration, amplitude, acceleration of vibration and operation time, installation acceleration transducer on the movable platen 8 of chucking appliance system；
Choose the circular cone 13 matched with tested bolt internal diameter, circular cone 13 is installed in the bellmouth of movable platen 8, then pin, bolt and nut pad 12, compress gasket 11 and tested bolt 9 are installed successively on circular cone 13；
Choose the power transmission sleeve 18 matched with tested bolt 9 internal diameter, successively sensor pad 16, washer type force transducer 17 are arranged on power transmission sleeve 18, then by its integral installation in fixed pedestal 19 rectangular opening, tentatively tighten tested bolt 9；
Tighten tested bolt 9 to target torque value by torque wrench, by the reading of data collecting system record washer type force transducer 17, after its indicating value is stable, record this value F；
Open vibration mechine, shut down when being lost to predetermined value to clamping force or reach certain vibration number, record drive system cross shear and tested bolt axial pre tightening force versus time curve.
Repeat the above steps, tests the anti-loosening property of tested bolt 9 under different screwing forces, different structure, different frequency and amplitude and assesses.
After the tested bolt of a kind of model is finished, repeat the above steps, change tested bolt 9, circular cone 13 and power transmission sleeve 18, so, the anti-loosening property test of different size type bolt can be carried out.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; it cannot be assumed that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the protection domain that the present invention is determined by submitted claims.
Claims (8)
1. a threaded fastener transverse vibration testing device, it is characterised in that: include oscillation crosswise platform, drive system and pedestal (20) is installed；Oscillation crosswise platform is adjacently positioned on the ground with installation pedestal (20), and the bottom installing pedestal (20) is provided with the adjustment cushion block (21) for adjusting height；The top installing pedestal (20) is provided with for installing tested bolt (9) and the chucking appliance system of tested nut (10)；One end of drive system is connected with oscillation crosswise platform, and the other end is connected with chucking appliance system；The vibration of vibration source is passed to the tested bolt (9) on chucking appliance system and tested nut (10) by oscillation crosswise platform by drive system, and when oscillation crosswise Platform Vibration, drive system can drive chucking appliance system to do horizontal reciprocating movement；
Described chucking appliance system includes the movable platen (8) for laying tested bolt (9) and tested nut (10)；Movable platen (8) is arranged on fixed pedestal (19), and fixed pedestal (19) is fastened on the upper surface installing pedestal (20)；
Described movable platen (8) offer some for installing tested bolt (9) or the bellmouth of tested nut (10)；Board-like roller chain (14) is installed between movable platen (8) and fixed pedestal (19), and connects by testing bolt (9) nut (10)；Fixed pedestal (19) offers the rectangular opening corresponding with bellmouth, fixed pedestal (19) be arranged below power transmission sleeve (18)；Power transmission sleeve (18) lower end is the disc for mounting gasket, and upper end is the rectangular head that through hole or screwed hole are offered in inside, and the rectangular head of its upper end is deep in the rectangular opening of fixed pedestal (19)；The disk of power transmission sleeve (18) lower end is provided with the two sensors pad (16) stacked, being provided with washer type force transducer (17) between two sensors pad (16), washer type force transducer (17) is sleeved on power transmission sleeve (18)；When tested bolt (9) or tested nut (10) are tightened, the sensor pad (16) on washer type force transducer (17) top is in close contact with the bottom of fixed pedestal (19), and the sensor pad (16) of washer type force transducer (17) bottom is in close contact with the upper surface of power transmission sleeve (18) bottom disc.
2. threaded fastener transverse vibration testing device according to claim 1, it is characterized in that: in described bellmouth, be provided with circular cone (13), the internal diameter of circular cone (13) is be more than or equal to the external diameter of tested bolt (9), circular cone (13) all offers pin hole, and is connected by pin (15) and movable platen (8) are fixing；Bellmouth includes the bellmouth for testing tested bolt (9) and is used for testing the bellmouth of tested nut (10)；
When the bellmouth being used for testing tested bolt (9) installs tested bolt (9), tested bolt (9) is installed from top to bottom, being arranged with compress gasket (11) on the nut of tested bolt (9), compress gasket (11) is arranged with bolt and nut pad (12)；The rectangular head of power transmission sleeve (18) upper end offers the screwed hole matched with the screw thread on tested bolt (9)；
When the bellmouth being used for testing tested nut (10) installs tested bolt (9), tested bolt (9) is installed from bottom to top, and the rectangular head of power transmission sleeve (18) upper end offers the internal diameter through hole be more than or equal to the upper screw diameter of tested bolt (9)；Tested nut (10) is sleeved on tested bolt (9) and passes on the screw rod of movable platen (8), and tested nut (10) is arranged with compress gasket (11), compress gasket (11) is arranged with bolt and nut pad (12).
3. threaded fastener transverse vibration testing device according to claim 1 and 2, it is characterised in that: the center of described movable platen (8) offers a bellmouth, and uniformly offers 8 bellmouths around center circumferential direction；The upper surface of fixed pedestal (19) offers some row rectangular channel for mounting plate type roller chain (14)；Pedestal (20) is installed by being opened in T-slot and fixed pedestal (19) fastening of its upper surface；Installing pedestal (20) is cast iron T-slot platform.
4. threaded fastener transverse vibration testing device according to claim 1 and 2, it is characterized in that: described oscillation crosswise platform includes vibration platen pedestal (1), being connected to horizontal vibration platform (2) on vibration platen pedestal (1), horizontal vibration platform (2) is connected with vibration platen pedestal (1) by ball chain；Horizontal vibration platform (2) is fixing with the outfan of vibration source to be connected；One end of drive system is fixed on horizontal vibration platform (2).
5. threaded fastener transverse vibration testing device according to claim 4, it is characterized in that: described vibration source adopts excitation coil structure, vibration source outfan and horizontal vibration platform (2) are fastened by bolts, and horizontal vibration platform offers the many groups screwed hole for connecting drive system.
6. threaded fastener transverse vibration testing device according to claim 4, it is characterised in that: retainer (3) that described drive system includes being fixed on horizontal vibration platform (2) end face and the T-shaped driving member (7) that be connected fixing with movable platen (8)；Retainer (3) is installed with cylinder type driving member (4), cylinder type driving member (4) is horizontally disposed with, being provided with pull pressure sensor (6) between cylinder type driving member (4) and T-shaped driving member (7), the two ends of pull pressure sensor (6) are connected with cylinder type driving member (4) and T-shaped driving member (7) each through sensor flange (5).
7. threaded fastener transverse vibration testing device according to claim 6, it is characterised in that: also include charge amplifier, data actuation and data processing module；The signal input part of charge amplifier is connected with the signal output part of pull pressure sensor (6) and washer type force transducer (17) respectively, the signal output part of charge amplifier is connected with the signal input part of data actuation, and the signal output part of data actuation is connected with data processing module.
8. one kind based on the test method of threaded fastener transverse vibration testing device described in claim 2, it is characterised in that comprise the following steps:
1) according to the demarcation of dispatching from the factory of pull pressure sensor and washer type force transducer, range and sensitivity, the signal conversion ratio of setting data acquisition system of pull pressure sensor and washer type force transducer is set；
2) frequency of vibration of vibration mechine, amplitude, acceleration of vibration and operation time parameters are set, movable platen (8) installs acceleration transducer；
3) choose the circular cone (13) matched with tested bolt (9) external diameter, circular cone (13) is installed in the bellmouth of movable platen (8)；
In the bellmouth being used for testing tested bolt (9), successively pin (15), bolt and nut pad (12), compress gasket (11) and tested bolt (9) are installed on circular cone (13)；
In the bellmouth being used for testing tested nut (10), successively pin (15), bolt and nut pad (12), compress gasket (11), tested bolt (9) and tested nut (10) are installed on circular cone (13)；
4) the power transmission sleeve (18) matched with tested bolt (9) external diameter is chosen, successively sensor pad (16), washer type force transducer (17) are arranged on power transmission sleeve (18), again by its integral installation in the rectangular opening of fixed pedestal (19), tentatively tighten tested bolt (9)；
5) tighten tested bolt (9) and tested nut (10) to target torque value by torque wrench, by the reading of data collecting system record washer type force transducer (17), after its indicating value is stable, record this value；
6) open vibration mechine, shut down when being lost to predetermined value to clamping force, record drive system cross shear and tested bolt (9) or tested nut (10) axial pre tightening force versus time curve；
7) step 2 is repeated)～6), change tested bolt (9) or tested nut (10), circular cone (13) and power transmission sleeve (18), the anti-loosening property of threaded fastener under dissimilar and structure, different screwing force, different frequency and various amplitude is tested and assessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177952.0A CN103954419B (en) | 2014-04-29 | 2014-04-29 | A kind of threaded fastener transverse vibration testing device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177952.0A CN103954419B (en) | 2014-04-29 | 2014-04-29 | A kind of threaded fastener transverse vibration testing device and test method |
Publications (2)
| Publication Number | Publication Date |
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| CN103954419A CN103954419A (en) | 2014-07-30 |
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