CN105115839B - One kind transmission pivoted arm fatigue tester - Google Patents
One kind transmission pivoted arm fatigue tester Download PDFInfo
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- CN105115839B CN105115839B CN201510601142.8A CN201510601142A CN105115839B CN 105115839 B CN105115839 B CN 105115839B CN 201510601142 A CN201510601142 A CN 201510601142A CN 105115839 B CN105115839 B CN 105115839B
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- support
- leading truck
- metal leading
- support frame
- rotating disk
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Abstract
The present invention discloses a kind of transmission pivoted arm fatigue tester, including support frame, metal leading truck, Universal drive disk and acoustic emission probe；Horizontal positioned has metal leading truck on support frame, bottom on metal leading truck is provided with rotating disk, top on metal leading truck is provided with Universal drive disk, drive rod and connecting rod are also also equipped with by contiguous block on metal leading truck, the other end of drive rod is connected to rotating disk, the other end of connecting rod is upwardly extended and is connected with drive link and actuating arm in turn, and actuating arm is connected by connecting plate with test specimen, and test specimen is fixed on the top of support frame；It is also equipped with controlling on support frame and display system, is furnished with acoustic emission probe on connecting plate, rotating disk is driven by driving machine.Cost of the present invention is less expensive, and function collection is complete, and precision is of a relatively high.
Description
Technical field
The invention belongs to bridge structure fatigue test field, and in particular to one kind transmission pivoted arm fatigue tester.
Background technology
With expanding economy, the wagon flow volume of traffic increasingly increases, promote China built on great rivers it is more big across
Footpath bridge, and Large Span Bridges girder is generally steel construction, under the frequent effect of vehicular load, the fatigue study problem day of steel
Benefit highlights important.
At present, the experiment of large-scale Metal Material Fatigue is mostly by U.S. MTS (full name is mechanical test and simulation) liquid
Servo-type fatigue tester is pressed to complete, MTS basic functional principles are to provide corresponding requirements tension and compression load according to the different requirements of experiment
Act on test specimen, MTS system accuracies are high, have a wide range of application, but MTS system costs are high, and cost of use is also very high, typically
Scientific research institutions be difficult to receive.
The fatigue problem of steel is the hot issue studied at present, for the feasibility of relieving fatigue scientific research and testing and easy
Property, thus needing one kind cheap, function collection is complete, the satisfactory fatigue experimental machine of precision.
At present, existing a variety of Mechanical Fatigue Test Machines mostly have following defect：
1. the inertia force that fatigue experimental machine is mostly produced by the Periodic Rotating of eccentric body, lotus is acted on to test specimen offer
Carry, the limited mass of eccentric body is smaller in the limit value in space, thus the load scope very little that testing machine is produced, the applicable model of experiment
Enclose small.
2. the inertia force direction produced by the Periodic Rotating of eccentric body is continually changing, it is loaded directly into test specimen
On, cause the size direction of active force to be continually changing, load peak value is only the parameter of fatigue tester setting, so as to influence fatigue
Load the degree of accuracy of width.
3. actual vehicle load randomness is big, and plain fatigue testing machine can only provide periodically often width loading, with reality
Situation is inconsistent, so as to influence the precision of fatigue experiment.
4. plain fatigue testing machine control system can only close down machine when setting loaded cycle number of times, it is impossible to monitoring in real time
Fatigue crack, situation is produced according to crackle, and interactive mode closes down machine, and form is simple, and function is single.
The content of the invention
Goal of the invention：It is an object of the invention to solve the deficiencies in the prior art, there is provided one kind transmission pivoted arm is tired
Labor testing machine.
Technical scheme：A kind of transmission pivoted arm fatigue tester of the present invention, including support frame, metal leading truck, ten thousand
To drive plate and acoustic emission probe；Horizontal positioned has the bottom on metal leading truck, metal leading truck to install on support frame as described above
There is the top on rotating disk, metal leading truck to be provided with Universal drive disk, metal leading truck and drive rod is also provided with by contiguous block
And connecting rod, the other end of drive rod is connected to rotating disk, the other end of connecting rod upwardly extend and be connected with drive link in turn and
Actuating arm, actuating arm is connected by connecting plate with test specimen, and test specimen is fixed on the top of support frame；It is also equipped with support frame as described above
It is furnished with acoustic emission probe on control and display system, connecting plate, rotating disk is driven by driving machine；The metal leading truck is passed with universal
By gear snap-in between Moving plate, guide groove is offered on Universal drive disk, actuating arm is placed in guide groove and logical with connecting plate
Articulated form connection is crossed, can be according to the steerings for testing different requirement adjustment Universal drive disks and then the effect side to adjust actuating arm
To while guide groove ensures that force direction is parallel with actuating arm direction all the time.
Further, support frame as described above is L-shaped including first support and second support, and first support is horizontally mounted and ground
And second support is vertically connected at first support, the test specimen is fixed on the top of second support by anchorage, the control and
Display system is installed on first support.
To provide good anti-bending strength and structural stability, the first support and second support are in I-shaped.
Further, the drive rod is connected with rotating disk and connecting rod by articulated manner, by adjusting drive rod
With the radius of gyration and then the Oscillation Amplitude of adjustment actuating arm of rotating disk tie point.
Further, acoustic emission probe is installed on the both sides of test specimen weld seam, in real time the generation and development of monitoring fatigue crack
Situation, is then transmit in control and display system, control and display system also display actuating arm vibration frequency and vibration in real time
Magnitude aspect.
Further, guide pad is additionally provided with the metal leading truck, guide pad is to be stably connected with bar 8 in running
In travel paths, reduce deviation, improve precision.
Beneficial effect：Compared with prior art, the present invention has advantages below：
(1) the high-power power set being easy to get are applied in fatigue test by the present invention, can be obtained high frequency, peak value and be moved
Power load, relative to standard machinery formula fatigue tester, expands fatigue experiment scope, improves the feasibility of fatigue test,
Reduce the operating cost of fatigue experiment.
(2) the Universal drive disk in the present invention can realize the multi-direction transmission of load, and can meet different experiments will
Ask, improve the scope of application of testing machine.
(3) the accurate mechanical system and Electronic Control in the present invention show system, it is possible to achieve accurate tension and compression load
Spectrum output, improves the reliability of fatigue test, on the premise of fatigue test precision is met, can partly replace MTS systems.
(4) apparatus of the present invention are provided with acoustic emission monitor(ing) device, coordinate Electronic Control to show system, can monitor in real time,
The generation of display output fatigue crack and extension situation, according to different experiments needs, control experiment process immediately.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the side view in B-B directions in Fig. 1；
Fig. 3 is the structural representation of connecting plate in the present invention；
Fig. 4 is the top view of connecting plate in the present invention；
Fig. 5 is the sectional view in A-A directions in Fig. 1；
Fig. 6 is the structural representation of turntable of the present invention；
Fig. 7 is the structural representation of Universal drive disk in the present invention；
Fig. 8 is the side view of Universal drive disk in the present invention；
Fig. 9 is the cross-sectional view in C-C directions in Fig. 2；
Figure 10 is the cross-sectional view in D-D directions in Fig. 2；
Figure 11 is acoustic emission probe arrangement schematic diagram in the present invention.
Wherein, I regions refer to the bolt riveting area of first support and second support；II regions refer to first support and driving
The bolt riveting area of machine；III refers to first support with controlling and showing the bolt riveting area of system；IV regions refer to first support
Area is riveted with the bolt of ground.
Embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
As depicted in figs. 1 and 2, a kind of transmission pivoted arm fatigue tester of the invention, including support frame, metal leading truck 3,
Universal drive disk 11 and acoustic emission probe 18；Horizontal positioned has the bottom on metal leading truck 3, metal leading truck 3 on support frame
The top being provided with rotating disk 4, metal leading truck 3 is provided with Universal drive disk 11, metal leading truck 3 also by contiguous block 6 also
Drive rod 5 and connecting rod 8 be installed, the other end of drive rod 5 is connected to rotating disk 4, the other end of connecting rod 8 upwardly extend and according to
Secondary to be connected with drive link 9 and actuating arm 10, actuating arm 10 is connected by connecting plate 12 with test specimen 14, and test specimen 14 is fixed on support frame
Top；It is also equipped with controlling on support frame and display system 17, is furnished with acoustic emission probe 18 on connecting plate 12, rotating disk 4 is by driving
Motivation drives.
As shown in figure 5, support frame is L-shaped including first support 2 and second support 16, first support 2 is horizontally installed to ground
Base 1 and second support 16 is vertically connected at first support 2, test specimen 14 is fixed on the top of second support 16 by anchorage 15, control
System and display system 17 are installed on first support 2；And first support 2 and second support 16 are in I-shaped.
As shown in Fig. 3 and Fig. 4 and Fig. 6 to Fig. 8, by gear snap-in between metal leading truck 3 and Universal drive disk 11,
Guide groove 21 is offered on Universal drive disk 11, actuating arm 10 is placed in guide groove 21 and connected with connecting plate 12 by articulated form
Connect, the action direction of actuating arm 10 is adjusted by adjusting the steering of Universal drive disk 11, while guide groove 21 ensures active force
Direction is parallel with the direction of actuating arm 10 all the time.The tracks of rotating disk 4 and the tie point of drive rod 5 are offered on the surface of rotating disk 4
20.
Above-mentioned drive rod 5 is connected with rotating disk 4 and connecting rod 8 by articulated manner, by adjusting drive rod 5 and rotating disk
The radius of gyration of 4 tie points and then the Oscillation Amplitude for adjusting actuating arm 10.
Guide pad 7 is additionally provided with above-mentioned metal leading truck 3.
As shown in figure 11, acoustic emission probe 18 is installed on the both sides of the weld seam 22 of test specimen 14, in real time the production of monitoring fatigue crack
Raw and state of development, is then transmit in control and display system 17, control and display system 17 and goes back display actuating arm 10 in real time
Vibration frequency and Oscillation Amplitude situation.
Driving machine driving rotating disk 4 is rotated, and drives drive rod 5 to operate, successively driving connecting rod 8, drive link 9 and start
Arm 10.Required according to different experiments, adjust the steering of Universal drive disk 11 to control the direction of actuating arm 10, power is transferred to
On test specimen 14, the power output flow of driving machine is completed, reciprocal application function of the tension and compression load on test specimen is realized.
Embodiment 1：Specifically the present invention is introduced below by embodiment 1.
The Preparatory work of experiment stage：
With reference to Fig. 1, test specimen 14 is riveted in second support 16 by anchorage 15 first, the face of second support 16 provided with a,
The riveted holes group (as shown in Figure 9 and Figure 10) of tri- kinds of diverse locations of b, c, driving machine and gold are adjusted according to the size and location of test specimen 14
Belong to position of the leading truck 3 in first support 2, connection actuating arm 10 and test specimen 14, contiguous block is provided between bolt 13 and test specimen 14
6, stress raisers are prevented, remaining each part of the present invention is finally installed.
Required according to different experiments, the direction of actuating arm 10 is adjusted by adjusting the steering of Universal drive disk 11.
With reference to Figure 11, required according to different experiments, the acoustic emission probe of varying number is installed in the both sides of 14 weld seam of test specimen 22
18.When need to only monitor crack, then two acoustic emission probes 18 (1. and 2.) need to be only installed；When need monitoring crack occur,
During the panel path of extension, then need to install three acoustic emission probes 18 (1., 2. and 3.)；When need monitoring crack occur, expand
During the space path of exhibition, then need that four acoustic emission probes 18 are installed.
Load phase：
Start the present invention, then according to different experiments type input data, if carrying out simulation actual bridge test, input is actual
Traffic spectra；If carrying out normal experiment test, vibration frequency f and amplitude a and corresponding duration of Δ t are manually entered, people is formed
Work traffic spectra.
With reference to Fig. 6, control and display system 17 is voluntarily work out, according to input traffic spectra, and control and display system 17 are real
When electric adjustment rotating disk 4 and the tie point orbital position of connecting rod 8, change Oscillation Amplitude a, control and display system 17 are electrically adjusted
The rotating speed n of rotating disk 4, changes vibration period T.
Control and display system 17 real-time output display Oscillation Amplitude a, frequency f and accumulative load time Δ t.
Control and display system 17 use software programming, and the operation thinking of control software includes following steps：
A. experimental machine is started, (simulation actual bridge test then inputs actual loading spectrum to input data；Normal experiment is tested, then hand
Dynamic inputted vibration frequency f and amplitude a and accordingly accumulative load time Δ t, form artificial traffic spectra)；
B. according to input data, electrical control rotating disk 4 and the tie point position of connecting rod 8 adjust Oscillation Amplitude, electrical control
The rotating speed n of rotating disk 4, adjusts vibration period T, calculates load time t；
C. real-time output display Oscillation Amplitude a, frequency f and accumulative load time Δ t；
D. the processing acoustic emission probe eighteen data in real time of system 17 is controlled and shown, if detecting crackle, testing machine is closed down,
The accumulative loading number of times of output, terminates loading；If not detecting crackle, total data is loaded successively to finishing, experiment is closed down
Machine, loading terminates.
Unloading phase：
Total data output is finished, and loading terminates, and closes down testing machine.
Claims (6)
1. one kind transmission pivoted arm fatigue tester, it is characterised in that：Including support frame, metal leading truck, Universal drive disk harmony
Transmitting probe；
Horizontal positioned has the bottom on metal leading truck, metal leading truck to be provided with rotating disk, metal leading truck on support frame as described above
On top be provided with Universal drive disk, drive rod and connecting rod are also provided with by contiguous block on metal leading truck, drive rod
The other end is connected to rotating disk, and the other end of connecting rod upwardly extends and is connected with drive link and actuating arm in turn, and actuating arm passes through
Connecting plate is connected with test specimen, and test specimen is fixed on the top of support frame；
It is also equipped with controlling on support frame as described above and display system, is furnished with acoustic emission probe on connecting plate, rotating disk is driven by driving machine
It is dynamic；
By gear snap-in between the metal leading truck and Universal drive disk, guide groove, start are offered on Universal drive disk
Arm is placed in guide groove and is connected with connecting plate by articulated form, and actuating arm is adjusted by adjusting the steering of Universal drive disk
Action direction, while guide groove ensures that force direction is parallel with actuating arm direction all the time.
2. transmission pivoted arm fatigue tester according to claim 1, it is characterised in that：Support frame as described above is L-shaped including
One support and second support, first support is horizontally installed to ground and second support is vertically connected at first support, the test specimen
The top of second support is fixed on by anchorage, control and the display system is installed on first support.
3. transmission pivoted arm fatigue tester according to claim 2, it is characterised in that：The first support and second support
In I-shaped.
4. transmission pivoted arm fatigue tester according to claim 1, it is characterised in that：The drive rod and rotating disk and company
Extension bar is connected by articulated manner, by adjusting the radius of gyration of drive rod and rotating disk tie point and then adjusting shaking for actuating arm
Dynamic amplitude.
5. transmission pivoted arm fatigue tester according to claim 1, it is characterised in that：The acoustic emission probe is installed on examination
The both sides of part weld seam, in real time monitoring fatigue crack generation and state of development, be then transmit to control and display system, control and
Actuating arm vibration frequency and Oscillation Amplitude situation are also shown in display system in real time.
6. transmission pivoted arm fatigue tester according to claim 1, it is characterised in that：It is additionally provided with the metal leading truck
Guide pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601142.8A CN105115839B (en) | 2015-09-18 | 2015-09-18 | One kind transmission pivoted arm fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601142.8A CN105115839B (en) | 2015-09-18 | 2015-09-18 | One kind transmission pivoted arm fatigue tester |
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| Publication Number | Publication Date |
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| CN105115839A CN105115839A (en) | 2015-12-02 |
| CN105115839B true CN105115839B (en) | 2017-09-26 |
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ID=54663879
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510601142.8A Active CN105115839B (en) | 2015-09-18 | 2015-09-18 | One kind transmission pivoted arm fatigue tester |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438531B (en) * | 2016-11-01 | 2018-10-23 | 福建省计量科学研究院 | A kind of double oil pump hydraulic control systems and control method of fatigue tester |
| CN108956344B (en) * | 2018-04-23 | 2020-07-28 | 杭州电子科技大学 | Rubber forming sheet metal part fatigue test device and test method |
| CN110686966B (en) * | 2019-11-19 | 2021-12-10 | 华北水利水电大学 | Composite loading device for civil engineering experiments |
| CN113252794B (en) * | 2021-06-03 | 2021-11-16 | 沈阳工业大学 | Acoustic emission crack monitoring method and system |
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| EP0452573A1 (en) * | 1988-10-14 | 1991-10-23 | Prescott, Rhona Margaret Helen | Fatigue monitoring |
| GB2389665A (en) * | 2002-06-15 | 2003-12-17 | Wykes Of Leicester | Simulating stretch and recovery characteristics of fabrics |
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| JPH11230874A (en) * | 1998-02-16 | 1999-08-27 | Mitsubishi Heavy Ind Ltd | Mobile jig for testing load fatigue |
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2015
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| EP0452573A1 (en) * | 1988-10-14 | 1991-10-23 | Prescott, Rhona Margaret Helen | Fatigue monitoring |
| GB2389665A (en) * | 2002-06-15 | 2003-12-17 | Wykes Of Leicester | Simulating stretch and recovery characteristics of fabrics |
| CN201285362Y (en) * | 2008-10-22 | 2009-08-05 | 宝山钢铁股份有限公司 | Bending fatigue experiment apparatus for band steel weld seam |
| CN201532341U (en) * | 2009-10-27 | 2010-07-21 | 锦州万友机械部件有限公司 | Vibration absorber piston rod lateral dynamic bending fatigue testing device |
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| CN105115839A (en) | 2015-12-02 |
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