CN103837409A - Pulse fatigue testing machine and fatigue testing device used by same - Google Patents
Pulse fatigue testing machine and fatigue testing device used by same Download PDFInfo
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- CN103837409A CN103837409A CN201410094984.4A CN201410094984A CN103837409A CN 103837409 A CN103837409 A CN 103837409A CN 201410094984 A CN201410094984 A CN 201410094984A CN 103837409 A CN103837409 A CN 103837409A
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Abstract
The invention provides a pulse fatigue testing machine and a fatigue testing device used by the same. The fatigue testing device comprises a fixed frame and a drawing frame, wherein at least two actuators are connected on the fixed frame; one or more upper clamps are also arranged on the fixed frame; lower clamps corresponding to the upper clamps are arranged on the drawing frame; the upper and lower clamps are arranged between at least two actuators; each upper clamp and each corresponding lower clamp are respectively used for fixing the two ends of a workpiece to be tested; pressure heads of at least two actuators respectively push against the drawing frame so that the actuators can push the drawing frame to move away from the fixed frame under action of a control system so as to draw the workpiece to be tested. The pulse fatigue testing machine and the fatigue testing device can be used for carrying out drawing fatigue tests on small samples. The fatigue testing device can expand the test range of the pulse fatigue testing machine when applied to the pulse fatigue testing machine.
Description
Technical field
The present invention relates to the torture test technology of component of machine, relate in particular to a kind of pulse fatigue testing machine fatigue experimental device and pulse fatigue testing machine.
Background technology
In modern industry, burn into fracture and wearing and tearing are main causes of mechanical component and engineering component damage inactivation, wherein corrode and wearing and tearing process slow, can or regularly place under repair to avoid by periodic replacement part to destroy, and fracture usually occurs suddenly, and unpredictable.Cause the reason of parts fracture a lot, such as overload, black brittleness, hydrogen embrittlement, stress corrosion and fatigue, and engineering actual conditions show that the overwhelming majority is all to be caused by fatigue.
Therefore,, for avoiding parts because fatigue break damages, the new equipment of design is carried out strength check or the equipment in operational process carried out, in the situations such as strength check, all need to test the fatigue behaviour of parts under different alterante stress effects.
In prior art, the common equipment that carries out torture test has hydraulic pulsation fatigue tester, but pulse fatigue testing machine can only be used for various relatively large parts and structure to carry out unidirectional pulsation compression or repeated bend test, and can not realize the tensile fatigue test of small sample, trial stretch is very limited.
Summary of the invention
The invention provides a kind of pulse fatigue testing machine fatigue experimental device and pulse fatigue testing machine, can carry out the tensile fatigue test of small sample, for expanding the trial stretch of pulse fatigue testing machine.
The invention provides a kind of pulse fatigue testing machine fatigue experimental device, comprise fixed mount and draw frame, on described fixed mount, be connected with at least two actuator, on described fixed mount, be also provided with one or more upper fixtures, on described draw frame, be provided with the lower clamp corresponding with described upper fixture, described upper fixture and described lower clamp are all between at least two described actuator, and each described upper fixture and corresponding lower clamp are respectively used to fix the two ends of a workpiece to be tested;
The pressure head of at least two described actuator is supported respectively on described draw frame, moves, so that described workpiece to be tested is stretched so that described actuator can promote described draw frame under the effect of control system to the direction away from described fixed mount.
The present invention also provides a kind of pulse fatigue testing machine, includes pulse fatigue testing machine fatigue experimental device as above.
Fatigue experimental device and pulse fatigue testing machine for pulse fatigue testing machine provided by the invention, by fixed mount and draw frame are set, on fixed mount, be provided with actuator, draw frame moves to the direction away from fixed mount under actuator effect, can stretch to the workpiece being connected between fixed mount and draw frame, this device can carry out the tensile fatigue test of small sample, is applied on pulse fatigue testing machine, can expand testing pulse fatigue and trial stretch.
Accompanying drawing explanation
Fig. 1 is the structural representation of pulse fatigue testing machine of the present invention fatigue experimental device;
Fig. 2 is the structural representation of pulse fatigue testing machine of the present invention with draw frame in fatigue experimental device;
Fig. 3 is the structural representation of pulse fatigue testing machine of the present invention with the other direction of draw frame in fatigue experimental device;
Fig. 4 is the structural representation of pulse fatigue testing machine of the present invention with the bogie side frame of draw frame in fatigue experimental device;
Fig. 5 is the structural representation of pulse fatigue testing machine of the present invention with the middle frame of draw frame in fatigue experimental device;
Fig. 6 is the structural representation that pulse fatigue testing machine of the present invention fatigue experimental device is provided with column.
Embodiment
The embodiment of the present invention provides a kind of pulse fatigue testing machine fatigue experimental device, as shown in Figure 1, this fatigue experimental device comprises fixed mount 1 and draw frame 2, on fixed mount 1, be connected with at least two actuator 3, on fixed mount 1, be also provided with one or more upper fixtures 5, on draw frame 2, be provided with the lower clamp 5 ' corresponding with upper fixture 5, upper fixture 5 and lower clamp 5 ' are all between at least two actuator 3, and each upper fixture 5 and corresponding lower clamp 5 ' are respectively used to fix the two ends of a workpiece to be tested.
The pressure head of at least two actuator 3 is supported respectively on draw frame 2, so that actuator 3 can promote draw frame 2 to moving away from the direction of fixed mount 1 under the effect of control system, stretches to treat test piece 4.
In Fig. 1, only illustrate and on fixed mount 1, be provided with two actuator 3, and between two actuator 3, the situation of a fixture is respectively set, for a workpiece is carried out to testing fatigue on fixed mount 1 and draw frame 2.In Fig. 1, workpiece 4 to be tested is between two actuator 3, and two actuator 3 apply downward acting force to draw frame 2 simultaneously, can make the suffered tensile force symmetery of test piece 4.It will be appreciated by those skilled in the art that, on fixed mount 1, multiple actuator can be set, between any two actuator, one or more fixtures can be set, the present embodiment is placed in workpiece to be tested between actuator, can be in the time treating test piece and stretch, the both sides stress equalization of workpiece to be tested.
In the present embodiment, as shown in Figure 1, because the length of actuator 3 is longer, and the length of workpiece to be tested 4 is shorter, for ease of fixing of workpiece 4 to be tested, is fixedly installed column structure 6 on fixed mount 1, and upper fixture 5 is fixed on column structure 6.
In the present embodiment, as shown in Figures 1 and 2, draw frame 2 comprises the bogie side frame 22 that middle frame 21 and middle frame 21 two ends connect; Lower clamp 5 ' is fixed on middle frame 21, and two actuator 3 are supported respectively on two bogie side frames 22.
For the workpiece that adapts to different length is tested, make the distance between fixed mount 1 and draw frame 2 adjustable, between the middle frame 21 of draw frame 2 and each bogie side frame 22, be provided with position adjustment structure 23, to adjust the link position of middle frame 21 and bogie side frame 22, distance between bogie side frame 22 and fixed mount 1 is to have determined in when design according to the length of actuator 3, therefore, by adjusting the link position of middle frame 21 and bogie side frame 22, distance between capable of regulating fixed mount 1 and middle frame 21, so that can be suitable for the workpiece of different length between upper fixture 5 and lower clamp 5 '.
In the present embodiment, position adjustment structure 23 is multiple bolts hole set on each bogie side frame 22, and middle frame 21 is by being connected its link position of capable of regulating with the bolt hole of diverse location on bogie side frame 22.Because the distance between fixed mount 1 and bogie side frame 22 is to have determined in when design according to the length of actuator 3, thus can by adjust middle frame 21 with the link position of bogie side frame 22 with the distance between adjustment middle frame 21 and fixed mount 1.
In the present embodiment, as shown in Figures 2 and 4, each bogie side frame 22 comprises transverse slat 221 connected vertically and riser 222, multiple bolts hole are disposed on the length direction of riser 222, the two ends of middle frame 21 are connected by the plurality of bolt hole is vertical with the riser 222 of two bogie side frames 22 respectively, and can adjust its link position by the plurality of bolt hole, concrete, as shown in Fig. 3～Fig. 5, the two ends of middle frame 1 are respectively provided with two the first syndetons 211, riser 222 is provided with two the second syndetons 223 towards a side of middle frame 21, multiple bolts hole on bogie side frame 22 are arranged on the length direction of the second syndeton 223, middle frame 21 links together by two the first syndetons 211 and two the second corresponding connections of syndeton 223 with bogie side frame 22.
In the present embodiment, for making actuator 3 in the process of moving up and down, the suffered tensile force of workpiece 4 to be tested is along the direction transmission of workpiece 4 to be tested, between fixed mount 1 and upper fixture 5, between (between the column structure 6 and upper fixture 5 being specifically connected), draw frame 2 and lower clamp 5 ', be respectively arranged with oscillating bearing (not shown) on fixed mount 1, wherein, oscillating bearing known to those skilled in the art know can 360 ° of rotations sliding bearing.
In the present embodiment, as shown in Figure 6, this fatigue experimental device also comprises two columns 7, the two ends of fixed mount 1 are separately fixed on two columns 7, two actuator 3 on fixed mount 1 are sling, wherein, owing to being hung with two actuator 3 on fixed mount 1, fixed mount 1 requires to have enough intensity, on fixed mount 1, be provided with the reinforcement 11 of multiple vertical settings, the pressure head of two actuator 3 on fixed mount 1 can move up and down under the control of control system, thereby move to promote draw frame 2 at the two ends of supporting draw frame 2.
The pulse fatigue testing machine fatigue experimental device that the embodiment of the present invention provides, by fixed mount and draw frame are set, draw frame moves to the direction away from fixed mount under actuator effect, can stretch to the workpiece being connected between fixed mount and draw frame, this device can carry out the tensile fatigue test of small sample, be applied on pulse fatigue testing machine, can expand testing pulse fatigue and trial stretch.
Another embodiment of the present invention also provides a kind of pulse fatigue testing machine, includes the pulse fatigue testing machine testing pulse fatigue device that the arbitrary embodiment of the present invention provides.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a pulse fatigue testing machine fatigue experimental device, it is characterized in that, comprise fixed mount and draw frame, on described fixed mount, be connected with at least two actuator, on described fixed mount, be also provided with one or more upper fixtures, on described draw frame, be provided with the lower clamp corresponding with described upper fixture, described upper fixture and described lower clamp are all between at least two described actuator, and each described upper fixture and corresponding lower clamp are respectively used to fix the two ends of a workpiece to be tested;
The pressure head of at least two described actuator is supported respectively on described draw frame, moves, so that described workpiece to be tested is stretched so that described actuator can promote described draw frame under the effect of control system to the direction away from described fixed mount.
2. pulse fatigue testing machine fatigue experimental device according to claim 1, it is characterized in that, described actuator is two, on described fixed mount, be provided with a described upper fixture, on described draw frame, be provided with a lower clamp corresponding with described upper fixture, described upper fixture and described lower clamp are all between two described actuator.
3. pulse fatigue testing machine fatigue experimental device according to claim 2, is characterized in that, described draw frame comprises the bogie side frame that middle frame and described middle frame two ends connect;
Described lower clamp is fixed on described middle frame, and two described actuator are supported respectively on two described bogie side frames.
4. according to the pulse fatigue testing machine fatigue experimental device described in right 3, it is characterized in that, between described middle frame and each described bogie side frame, be provided with position adjustment structure, to adjust the link position of described middle frame and described bogie side frame.
5. pulse fatigue testing machine fatigue experimental device according to claim 4, it is characterized in that, described position adjustment structure is multiple bolts hole set on described bogie side frame, and described middle frame is by being connected with the bolt hole of diverse location on described bogie side frame to adjust and the link position of described bogie side frame.
6. according to the pulse fatigue testing machine fatigue experimental device described in right 5, it is characterized in that, each described bogie side frame comprises transverse slat connected vertically and riser, and multiple described bolts hole are disposed on the length direction of described riser;
The two ends of institute's middle frame respectively with vertical connection of riser of two described bogie side frames, described actuator is supported on described transverse slat.
7. pulse fatigue testing machine fatigue experimental device according to claim 1, is characterized in that, on described fixed mount, is fixedly installed column structure, and described upper fixture is fixed on described column structure.
8. according to the arbitrary described pulse fatigue testing machine fatigue experimental device of claim 1-7, it is characterized in that, between described fixed mount and each described upper fixture, be respectively arranged with oscillating bearing between described draw frame and each described lower clamp.
9. according to the arbitrary described pulse fatigue testing machine fatigue experimental device of claim 1-7, it is characterized in that, also comprise two columns at described fixed mount two ends, the two ends of described fixed mount are separately fixed on described two columns.
10. a pulse fatigue testing machine, is characterized in that, comprises the arbitrary described pulse fatigue testing machine fatigue experimental device of claim 1-9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021450A (en) * | 2015-07-21 | 2015-11-04 | 西南交通大学 | Multi-sample parallel experiment clamp for providing continuous clamp force |
| CN106168560A (en) * | 2016-09-19 | 2016-11-30 | 西安科技大学 | Foreign material creep rate assay device under autoclave environment |
| CN108489802A (en) * | 2018-03-29 | 2018-09-04 | 武汉钢铁有限公司 | The device and method of metal material hydrogen embrittlement energy is detected under the conditions of dynamic bending |
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| CN202582980U (en) * | 2012-03-26 | 2012-12-05 | 南京航空航天大学 | Tension-shear test loading device for flight structure |
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| JPS5999328A (en) * | 1982-11-30 | 1984-06-08 | Shimadzu Corp | Material testing machine |
| JPH0954028A (en) * | 1995-08-18 | 1997-02-25 | Shimadzu Corp | Material testing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021450A (en) * | 2015-07-21 | 2015-11-04 | 西南交通大学 | Multi-sample parallel experiment clamp for providing continuous clamp force |
| CN106168560A (en) * | 2016-09-19 | 2016-11-30 | 西安科技大学 | Foreign material creep rate assay device under autoclave environment |
| CN108489802A (en) * | 2018-03-29 | 2018-09-04 | 武汉钢铁有限公司 | The device and method of metal material hydrogen embrittlement energy is detected under the conditions of dynamic bending |
| CN108489802B (en) * | 2018-03-29 | 2020-12-29 | 武汉钢铁有限公司 | Device and method for detecting hydrogen embrittlement resistance of metal material under dynamic bending condition |
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| CN103837409B (en) | 2016-06-08 |
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