CN204286930U - For the loading fixture of track testing fatigue - Google Patents
For the loading fixture of track testing fatigue Download PDFInfo
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- CN204286930U CN204286930U CN201420833010.9U CN201420833010U CN204286930U CN 204286930 U CN204286930 U CN 204286930U CN 201420833010 U CN201420833010 U CN 201420833010U CN 204286930 U CN204286930 U CN 204286930U
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Abstract
The utility model proposes a kind of loading fixture for track testing fatigue, be suitable for test welded type track structure, this welded type track structure at least comprises track and is positioned at the support rail beam cover panel below this track, this loading fixture comprises: lower clamp, this lower clamp comprises base and is positioned at two recesses of these base both sides, and wherein this recess comprises edge and lower edge and the upper surface of this base forms the lower edge of this recess; Fastening bolt, screw thread is coupled to the upper edge of this recess; Upper fixture, on this, one end of fixture is suitable for connecting this track via a register pin, and on this, other end of fixture is suitable for connection one fatigue tester, and wherein, these two recesses are suitable for the both sides holding this support rail beam cover panel.
Description
Technical field
The utility model relates to crane welded type track structure field tests, particularly relates to a kind of loading fixture for track testing fatigue.
Background technology
Welded type track structure is widely used in handling machinery industry because its installation makes simple, such as bank bridge crane, field bridge crane etc.As shown in Figure 1, welded type track structure mainly comprises track 1, lining plank 2 and support rail beam cover panel 3.Four fillet welds are comprised altogether, two fillet welds 4 between its middle orbit and lining plank, two fillet welds 4 between lining plank and support rail beam in welded type track structure.
Track structure is the important component part that a bridge plays transport heavy-duty machine, and welded type track structure is one of conventional track structure form.Under arms under state, track mainly bears compressive stress and the side force fatigue load of wheel and horizontal guide sheave generation.Under fatigue load effect, in order to ensure a bridge crane safety even running, track and lining plank, fillet weld anti-fatigue performance between lining plank and support rail beam cover panel are very crucial.
Traditional welding formula track structure form, as shown in Figure 1, wherein Size of welds is 6mm.Easily produce fatigue crack under state under arms, have a strong impact on a safe and stable operation for bridge crane.In order to improve the anti-fatigue performance of welded type track structure, mainly structure optimization and process improving are carried out to existing welded type track structure.In order to understand the impact of innovative approach on track anti-fatigue performance, need the loading condition of accurate simulation errant structure under actual working conditions.Not yet find the relevant loading jig that can be used for measuring welded type track structure fatigue lifetime at present.
Utility model content
For the demand of industry, the utility model proposes a kind of loading fixture for track testing fatigue being suitable for using in conjunction with fatigue tester.This loading fixture can be used for detecting the anti-fatigue performance of welded type track structure under fatigue load effect.
Particularly, the utility model proposes a kind of loading fixture for track testing fatigue, be suitable for test welded type track structure, this welded type track structure at least comprises track and is positioned at the support rail beam cover panel below this track, and this loading fixture comprises:
Lower clamp, this lower clamp comprises base and is positioned at two recesses of these base both sides, and wherein this recess comprises edge and lower edge and the upper surface of this base forms the lower edge of this recess;
Fastening bolt, screw thread is coupled to the upper edge of this recess;
Upper fixture, on this, one end of fixture is suitable for connecting this track via a register pin, and on this, other end of fixture is suitable for connection one fatigue tester,
Wherein, these two recesses are suitable for the both sides holding this support rail beam cover panel.
Preferably, in above-mentioned loading fixture, the upper surface of this base is an inclination angle relative to the lower surface of this base.
Preferably, in above-mentioned loading fixture, also comprise: the locating piece being arranged at the lower surface of this lower clamp base.
Preferably, in above-mentioned loading fixture, also comprise: the fixed block being arranged at the lower surface of this locating piece.
Preferably, in above-mentioned loading fixture, this inclination angle is regulated by this locating piece and/or fixed block.
Preferably, in above-mentioned loading fixture, this lower clamp is connected to the bearing of this fatigue tester via this locating piece and this fixed block.
Preferably, in above-mentioned loading fixture, this welded type track structure also comprises the lining plank be arranged between this track and this support rail beam cover panel, and this track, between this lining plank and this support rail beam cover panel respectively via solder joints.
Loading fixture of the present utility model can test the impact on fatigue lifetime such as different welded type track structure form (with or without lining plank), different Size of welds, different welding bead quantity, different welding position and different after welding treatment requirements, the force-bearing situation of analog orbit under actual working conditions.In conjunction with fatigue tester, adopt loading clamp prodigiosin of the present utility model comparatively accurately simultaneously sunykatuib analysis errant fillet weld at the anti-fatigue performance of stretch bending and side force fatigue load.
Should be appreciated that the generality of more than the utility model describes and the following detailed description is all exemplary and explanat, and be intended to for the utility model as claimed in claim provides further explanation.
Accompanying drawing explanation
Comprising accompanying drawing is further understand the utility model for providing, and they are included and form a application's part, and accompanying drawing shows embodiment of the present utility model, and plays the effect explaining the utility model principle together with this instructions.In accompanying drawing:
Fig. 1 shows the sectional view of welded type track structure.
Fig. 2 schematically shows the structure according to loading fixture of the present utility model.
Fig. 3 shows track test specimen testing fatigue matching S-N curve.
Embodiment
With detailed reference to accompanying drawing, embodiment of the present utility model is described now.Now with detailed reference to preferred embodiment of the present utility model, its example is shown in the drawings.In the case of any possible, in all of the figs the identical mark of use is represented same or analogous part.In addition, although the term used in the utility model selects from public term, but some terms mentioned in the utility model instructions may be that applicant selects by his or her judgement, its detailed meanings illustrates in the relevant portion of description herein.In addition, require not only to pass through used actual terms, but the meaning that also will be contained by each term understands the utility model.
The utility model devises a kind of loading fixture that can be used for the fatigue behaviour testing I-shaped track, uses this loading clamp prodigiosin to test out the fatigue strength of the welded type track adopting different structure, different welding technology comparatively accurately.First with reference to figure 2, this schematically shows the structure according to loading fixture of the present utility model.Loading fixture for track testing fatigue of the present utility model is suitable for testing the welded type track structure at least comprising track He be positioned at the support rail beam cover panel below this track.As already discussed above, this welded type track structure also comprises the lining plank be arranged between this track and this support rail beam cover panel, and this track, between this lining plank and this support rail beam cover panel respectively via solder joints.
As shown in the figure, the loading fixture for track testing fatigue of the present utility model mainly comprises: lower clamp 201, fastening bolt 202, upper fixture 203, register pin 204, track 205.
This lower clamp 201 comprises base and is positioned at two recesses of these base both sides.This recess comprises edge and lower edge, and wherein namely the upper surface of this base forms the lower edge of this recess.These two recesses are suitable for the both sides holding this support rail beam cover panel (with reference to figure 1).
Fastening bolt 202 screw thread is coupled to the upper edge of this recess, to be tight against the both sides of support rail beam cover panel, the latter is fixed.
On this, one end of fixture 203 is suitable for connecting this track 205 via register pin 204, and on this, other end of fixture 203 is suitable for connection one fatigue tester (not shown).Fatigue loading is carried out, the fatigue lifetime of test tracks under the effect of fatigue tester load.
Particularly, in the embodiment shown in Figure 2, the upper surface of the base of this lower clamp 201 is an inclination angle relative to the lower surface of this base.
Preferably, the lower surface place of the base of this lower clamp 201 is provided with locating piece 206.More preferably, fixed block 207 can be set further on the lower surface of this locating piece 206.Such as, this lower clamp 201 can be connected to the bearing of this fatigue tester via this locating piece 206 and this fixed block 207.
According to an optional embodiment, the inclination angle between the upper and lower surface of above-mentioned base can be regulated by this locating piece 206 and/or fixed block 207.
Below with A75 track (90kg/mm
2level, material is ST71) testing fatigue tested with A709-50-2 Plate Welding is that example elaborates and utilizes loading fixture of the present utility model to carry out the implementation step of testing, but the utility model is not as limit.
1. sample processing
According to Fig. 1, machine work is carried out to the track test specimen welded, to carry out fatigue loading.
2. testing fatigue
Fatigue tester loads wiring layout by track be installed to track sample, as shown in Figure 2.
The first step, screws fixture;
Second step, is tightened locating piece and lower clamp bolt by bolt (hexagon socket head cap screw of such as M4);
3rd step, fixed block is loaded in fatigue tester bearing T-slot, with bolt (hexagon socket head cap screw of such as M16) by lower clamp and fixed block bolt, and according to the size of fatigue testing specimen and upper chucking position, lower clamp is adjusted to suitable interval and position, tighten lower clamp fastening bolt;
4th step, be installed fatigue sample, and compress fatigue sample with bolt (such as M20 hexagon socket head cap screw);
5th step, with register pin link fatigue sample and upper fixture; For preventing register pin in process of the test from coming off, using nuts (such as M14 nut) is fastening.
6th step, arranges loaded load after being installed, carries out torture test.
Fatigue tester will load resonance frequency according to sample Auto-matching sample.After some cycles loads, commissure produces fatigue crack and produces inefficacy, and fatigue tester will stop fatigue loading automatically.
Often organize the testing fatigue that sample at least carries out under 5 kinds of different loaded load, record fatigue loading stress amplitude and fatigue loading cycles number of times, draw sample fatigue S-N diagram, S-N curve.Observe the track sample after fatigue loading to find, fatigue crack position and actual crack location coincide, and more adequately reflecting Track Anti fatigue behaviour, providing test basis for selecting rational track structure and welding technology.
Tested by fatigue loading, the cycle index under record different fatigue loading force, the track test specimen fatigue S-N diagram, S-N curve that matching is drawn out, as shown in Figure 3, comparative analysis adopts the anti-fatigue performance of the track fatigue sample of different track structure and welding technology.
In sum, the advantage of loading fixture of the present utility model is at least:
1, utilize the utility model to carry out fatigue loading, track crack location conforms to the actual crack location of product, can the anti-fatigue performance of Reaction Welding formula track comparatively accurately.
2, the utility model can not only simulate the pressure load that I-shaped track is subject to when actual loading, can also simulate the horizontal side force load that horizontal guide sheave applies.Ratio size according to horizontal side force and pressure devises fixture gradient, can reflect the impact of side force on track fatigue behaviour comparatively easily.
3, the utility model can carry out load loading comparatively easily, carries out the test of S-N curve.
Those skilled in the art can be obvious, can carry out various modifications and variations to above-mentioned exemplary embodiment of the present utility model and not depart from spirit and scope of the present utility model.Therefore, be intended to make the utility model to cover to drop within the scope of appended claims and equivalent arrangements thereof to amendment of the present utility model and modification.
Claims (7)
1., for a loading fixture for track testing fatigue, be suitable for test welded type track structure, described welded type track structure at least comprises track and is positioned at the support rail beam cover panel below described track, and it is characterized in that, described loading fixture comprises:
Lower clamp, described lower clamp comprises base and is positioned at two recesses of described base both sides, and wherein said recess comprises edge and lower edge and the upper surface of described base forms the lower edge of described recess;
Fastening bolt, screw thread is coupled to the upper edge of described recess;
Upper fixture, one end of described upper fixture is suitable for connecting described track via a register pin, and the other end of described upper fixture is suitable for connection one fatigue tester,
Wherein, described two recesses are suitable for the both sides holding described support rail beam cover panel.
2. load fixture as claimed in claim 1, it is characterized in that, the upper surface of described base is an inclination angle relative to the lower surface of described base.
3. load fixture as claimed in claim 2, it is characterized in that, also comprise: the locating piece being arranged at the lower surface of described lower clamp base.
4. load fixture as claimed in claim 3, it is characterized in that, also comprise: the fixed block being arranged at the lower surface of described locating piece.
5. load fixture as claimed in claim 4, it is characterized in that, described inclination angle is regulated by described locating piece and/or fixed block.
6. load fixture as claimed in claim 4, it is characterized in that, described lower clamp is connected to the bearing of described fatigue tester via described locating piece and described fixed block.
7. load fixture as claimed in claim 1, it is characterized in that, described welded type track structure also comprises the lining plank be arranged between described track and described support rail beam cover panel, and described track, between described lining plank and described support rail beam cover panel respectively via solder joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420833010.9U CN204286930U (en) | 2014-12-19 | 2014-12-19 | For the loading fixture of track testing fatigue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420833010.9U CN204286930U (en) | 2014-12-19 | 2014-12-19 | For the loading fixture of track testing fatigue |
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| Publication Number | Publication Date |
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| CN204286930U true CN204286930U (en) | 2015-04-22 |
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| CN201420833010.9U Active CN204286930U (en) | 2014-12-19 | 2014-12-19 | For the loading fixture of track testing fatigue |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865763A (en) * | 2016-03-25 | 2016-08-17 | 奇瑞汽车股份有限公司 | Fatigue testing device and method for multi-angle connection component |
| ES2665577A1 (en) * | 2017-03-31 | 2018-04-26 | Universidad De Cantabria | System for the testing of traction and compression fatigue loads on the fastening elements of a railway track within the same load cycle (Machine-translation by Google Translate, not legally binding) |
| CN109916751A (en) * | 2019-03-18 | 2019-06-21 | 中铁二院工程集团有限责任公司 | A kind of steep gradient ballast track bed long-term stable experiment device and test method |
-
2014
- 2014-12-19 CN CN201420833010.9U patent/CN204286930U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865763A (en) * | 2016-03-25 | 2016-08-17 | 奇瑞汽车股份有限公司 | Fatigue testing device and method for multi-angle connection component |
| ES2665577A1 (en) * | 2017-03-31 | 2018-04-26 | Universidad De Cantabria | System for the testing of traction and compression fatigue loads on the fastening elements of a railway track within the same load cycle (Machine-translation by Google Translate, not legally binding) |
| CN109916751A (en) * | 2019-03-18 | 2019-06-21 | 中铁二院工程集团有限责任公司 | A kind of steep gradient ballast track bed long-term stable experiment device and test method |
| CN109916751B (en) * | 2019-03-18 | 2023-11-17 | 中铁二院工程集团有限责任公司 | Long-term stability test device and test method for ballast bed of large ramp |
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