CN208254934U - A kind of three-point bending vibrating fatigue device with axial tension function - Google Patents
A kind of three-point bending vibrating fatigue device with axial tension function Download PDFInfo
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- CN208254934U CN208254934U CN201820577318.XU CN201820577318U CN208254934U CN 208254934 U CN208254934 U CN 208254934U CN 201820577318 U CN201820577318 U CN 201820577318U CN 208254934 U CN208254934 U CN 208254934U
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- support
- point bending
- axial tension
- vibrating fatigue
- bending vibrating
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Abstract
To overcome the shortcomings of that can only carry out the three-point bending vibrating fatigue without axial tension to fatigue sample in the prior art loads, the utility model proposes a kind of three-point bending vibrating fatigue devices with axial tension function.The application of the three-point bending vibrating fatigue device can effectively realize the experiment of the three-point bending vibrating fatigue under different stretch stress condition.Device includes support and two are located at support one side and for providing the supporting block of supporting point to test specimen, both ends on the outside of two supporting blocks are provided with the clamp assemblies for being smoothly clamped at the both ends of test specimen above support, the clamp assemblies are provided with the driving assembly for driving clamp assemblies to move axially relative to support along test specimen away from one end of supporting block, and the support is used to support the limit assembly being provided on the side of supporting block for playing the guiding role to clamp assemblies.
Description
Technical field
The utility model relates to structural material fatigue life testing field, specifically a kind of three with axial tension function
Point bending vibration fatigue device.
Background technique
Fatigue failure is the dominant failure in alternating load flowering structure part, such as crankshaft, gear, connecting rod, spring, bolt structure
Part and the isostructural main failure forms of pressure vessel, vehicle, aircraft, ocean platform, welded steel bridge are all fatigue ruptures.It is tired
Engineering component failure accidents caused by labor is destroyed account for the 80% of total accident ratio.Since fatigue fracture occurs suddenly, and lead to calamity
The accident of difficulty, therefore, fatigue of materials destroy the project that problem is always domestic and foreign scholars and engineering circles research and care.
In industrial circles such as aerospace, automobile, railway, machinery, some structural elements are during the work time not only
It subjects bending and vibrates the effect of bending load, constrained since both ends exist, often also subject to axial tensile loads
Effect, especially when the components are in high speed rotation state, due to the effect of centrifugal load, the influence of axial tensile loads
It is more very important.In this case, only with the free three-point bending in both ends in the actual condition of the components and test
The resulting conclusion difference of test method is larger, and especially when components are in vibrational state, the tensile stress at both ends can be total to it
Vibration frequency generates certain influence, and then influences its fatigue life.
Existing three-point bending vibrating fatigue device is mainly made of support and supporting block, provides two by supporting block
Fulcrum, test specimen is placed on it, three-point bending static(al) radial loaded is then carried out in the middle part of test specimen by pressure head, or pass through vibration
Head, which applies test specimen, to be vibrated, and the circulation radial loaded to test specimen is formed.But since existing three-point bending supporting arrangement does not have energy
Constraint and the tensile loads for enough realizing both ends, cause the measurement error for the three point bending test being collected by the device larger.
Utility model content
The three-point bending vibrating fatigue load without axial tension can only be carried out to fatigue sample in the prior art to overcome
Deficiency, the utility model proposes a kind of three-point bending vibrating fatigue devices with axial tension function.Three-point bending vibration
The application of dynamic fatigue device can effectively realize the experiment of the three-point bending vibrating fatigue under different stretch stress condition.
A kind of three-point bending vibrating fatigue device with axial tension function, including support and two are located at support one
Side and for providing the supporting block of supporting point to test specimen, the both ends on the outside of two supporting blocks are provided with for by test specimen
Both ends are smoothly clamped in the clamp assemblies above support, and the clamp assemblies are provided with away from one end of supporting block for driving
The driving assembly that clamp assemblies are moved axially relative to support along test specimen, the support, which is used to support on the side of supporting block, to be arranged
There is the limit assembly for playing the guiding role to clamp assemblies.
The clamp assemblies include upper fixture, lower fixture and through upper fixture upper and lower surface and with lower fixture screw thread connect
It connects and is used for the clamping fastening screw between upper fixture and lower fixture of test specimen.
The lower fixture is integrally L-shaped, and the mutual corresponding inboard, upright of two lower fixtures offers dovetail chute, and two
Upper fixture passes through dovetail chute respectively and neighbouring lower fixture sliding connects.
The support is the frame structure of cuboid, and the limit assembly is through support side wall and shape is the logical of stripe shape
Hole.
The through-hole both ends are provided with picking up the ears of being fixedly connected with support, the driving component include through one pick up the ears and with
One clamp assemblies be threadedly coupled standing screw, through another afterburner screw picked up the ears and be fixedly connected with another clamp assemblies with
And positioned at outside and the nut that is threadedly coupled with afterburner screw of picking up the ears.
The afterburner screw carries out flush cut processing far from one end of clamp assemblies.
The standing screw is fixedly installed the pressure plare parallel with picking up the ears far from one end of lower fixture.In pressure plare and lean on
Between the picking up the ears of nearly pressure plare setting there are two the two sides for being located at standing screw and with the power being fixedly connected sensing of picking up the ears
Device.
One end of two supporting blocks is inserted into through-hole respectively, and is connected by through-hole and support sliding.
The side of the support is provided with the mandril being threadedly coupled with support, and it is logical that mandril one end passes through the insertion of support one side wall
Kong Li, and supporting block is fixed on the support.
The position of the support and ejector pin contact be in open up it is fluted.
The fastening screw offers jack far from one end level of lower fixture.
The beneficial effects of the utility model are as follows:
One, it is tired to be provided with the three-point bending vibration that driving assembly can be realized under test specimen different stretch stress condition for the device
Labor experiment；
Two, the horizontal displacement of the supporting block in the device can be adjusted in a certain range, and it is suitable to increase the device
Use range.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the device；
Fig. 2 is the explosive view of the device；
Fig. 3 is the structural schematic diagram of lower fixture.
In figure: 1, support；11, it picks up the ears；12, through-hole；13, groove；21, standing screw；22, pressure plare；23, power senses
Device；24, afterburner screw；31, lower fixture；311, raised；312, dovetail chute；32, upper fixture；33, fastening screw；331, it inserts
Hole；34, nut；4, supporting block；41, mandril；5, test specimen.
Specific embodiment
A kind of three-point bending vibrating fatigue device with axial tension function, is tested for three-point bending vibrating fatigue,
The crooked fatigue experiment of achievable R > 1.As shown in Figure 1.The device includes 1, two supporting block 4 of support of frame structure, fixes
Screw rod 21, afterburner screw 24, the fastening screw 33 of plate upper fixture 32, two of lower fixture 31, two and nut 34.
In conjunction with Fig. 2, the through-hole 12 of stripe shape is offered in the one side wall of support 1.One end of two supporting blocks 4 is inserted into logical respectively
In hole 12, and connected by through-hole 12 and the sliding of support 1.The side of support 1 is provided with the mandril 41 being threadedly coupled with support 1.
41 one end of mandril passes through in 1 one side wall of support insertion through-hole 12, and supporting block 4 is fixed on support 1.In support 1 and mandril
The position of 41 contacts, which is in, opens up fluted 13, and microscope or cold air spout are placed when in order to test.
In conjunction with Fig. 2 and Fig. 3, the both ends of through-hole 12 be provided be fixedly connected with the side wall of support 1 pick up the ears 11.Each lower folder
Tool 31 is formed by the horizontal part contacted with support 1 and with 11 parallel vertical portion two parts of picking up the ears, and two lower 31 phases of fixture
To be located at two and pick up the ears between 11.It is fixedly installed below horizontal part in insertion through-hole 12 and is slid with support 1 and connected
Protrusion 311.Two mutual corresponding one side walls in vertical portion offer dovetail chute 312 along the vertical direction；The upper folder
Tool 32 is between two vertical portions and parallel with horizontal part, and one end of two upper fixtures 32 passes through corresponding dovetail respectively and slides
Slot 312 slides with mutually close vertical portion and connects.
During installing test specimen 5, the both ends of test specimen 5 sequentially pass through upper fixture 32 and examination by fastening screw 33 vertically
It part 5 and is threadedly coupled, is fixed between upper fixture 32 and lower fixture 31 (referring now to Fig. 1) with lower fixture 31.
In conjunction with Fig. 2, fastening screw 33 offers jack 331 far from one end level of support 1.When needing to turn fastening screw
When 33, a root cutting bar can be inserted into jack 331, in order to rotate fastening screw 33.The standing screw 21 runs through side
Ear 11 is threadedly coupled with the vertical portion of a lower fixture 31.The afterburner screw 24 is through another 11 and another lower fixture of picking up the ears
31 vertical portion is threadedly coupled.The nut 34 contacted with afterburner screw 24 pick up the ears 11 outside and 24 screw thread of afterburner screw
Connect (the spiral shell that the screw thread and afterburner screw 24 that in the present embodiment, afterburner screw 24 is contacted with nut 34 are contacted with lower fixture 31
Line direction of rotation is identical).Afterburner screw 24 far from pick up the ears 11 one end carry out flush cut processing, in order to turn family spiral shell
Bar.It is fixedly installed and 11 parallel pressure plares 22 of picking up the ears in standing screw 21 far from one end of lower fixture 31.In pressure plare 22
And close to pressure plare 22 pick up the ears between 11 setting there are two the two sides for being located at standing screw 21 and with this pick up the ears it is 11 fixed
The force snesor 23 of connection.
When needing to apply axial tension to test specimen 5, nut 34 is turned, presss from both sides nut 34 downwards relative to afterburner screw 24
The direction of tool 31 is mobile, so that lower fixture 31 applies axial tension to test specimen 5 by fastening screw 33.And pressure plare at this time
22 is mobile to 11 directions of picking up the ears under the drive of test specimen 5, and then squeezes force snesor 23, and force snesor 23 is made to measure 5 institute of test specimen
The axial tension being subject to.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in the scope of the claims of the utility model.
Claims (11)
1. a kind of three-point bending vibrating fatigue device with axial tension function, including support (1) and two are located at support
(1) one side and for test specimen (5) provide supporting point supporting block (4), it is characterised in that: be located at two supporting blocks (4) outside
The both ends of side are provided with the clamp assemblies for being smoothly clamped at the both ends of test specimen (5) above support (1), the clamping group
Part is provided with the drive for driving clamp assemblies to move axially relative to support (1) along test specimen (5) away from the one end of supporting block (4)
Dynamic component, the support (1) are used to support the limit being provided on the side of supporting block (4) for playing the guiding role to clamp assemblies
Hyte part.
2. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 1, feature exist
In: clamp assemblies include upper fixture (32), lower fixture (31) and through upper fixture (32) upper and lower surface and with lower folder
Have (31) to be threadedly coupled and be used for the clamping fastening screw (33) between upper fixture (32) and lower fixture (31) of test specimen (5).
3. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 2, feature exist
In: the lower fixture (31) is whole L-shaped, and the mutual corresponding inboard, upright of two lower fixtures (31) offers dovetail chute
(312), two upper fixtures (32) are slid by dovetail chute (312) and neighbouring lower fixture (31) connect respectively.
4. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 1, it is characterised in that:
The support (1) is the frame structure of cuboid, and the limit assembly is through support (1) side wall and shape is the through-hole of stripe shape
(12)。
5. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 4, it is characterised in that:
Through-hole (12) both ends be provided be fixedly connected with support (1) pick up the ears (11), the driving component includes picking up the ears through one
(11) and with a clamp assemblies standing screw (21) that is threadedly coupled picks up the ears (11) and to fix with another clamp assemblies through another
The afterburner screw (24) of connection and positioned at the nut (34) for picking up the ears to be threadedly coupled on the outside of (11) and with afterburner screw (24).
6. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 5, it is characterised in that:
The afterburner screw (24) carries out flush cut processing far from one end of clamp assemblies.
7. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 5, it is characterised in that:
The standing screw (21) is fixedly installed and (11) parallel pressure plare (22) of picking up the ears far from the one end of lower fixture (31)；It is pressing
Power plate (22) and between the picking up the ears of pressure plare (22) (11) setting there are two the two sides for being located at standing screw (21) and
It picks up the ears with this force snesor (23) that (11) be fixedly connected.
8. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 5, it is characterised in that:
It is inner that through-hole (12) is inserted into one end of two supporting blocks (4) respectively, and is connected by through-hole (12) and support (1) sliding.
9. a kind of three-point bending vibrating fatigue device with axial tension function according to claim 5, it is characterised in that:
The side of the support (1) is provided with the mandril (41) being threadedly coupled with support (1), and mandril (41) one end passes through support (1) one
It is inner that side wall is inserted into through-hole (12), and supporting block (4) is fixed on support (1).
10. a kind of three-point bending vibrating fatigue device with axial tension function, feature exist according to claim 9
In: the position that the support (1) contacts with mandril (41), which is in, opens up fluted (13).
11. a kind of three-point bending vibrating fatigue device with axial tension function, feature exist according to claim 2
In: the fastening screw (33) offers jack (331) far from one end level of lower fixture (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820577318.XU CN208254934U (en) | 2018-04-23 | 2018-04-23 | A kind of three-point bending vibrating fatigue device with axial tension function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820577318.XU CN208254934U (en) | 2018-04-23 | 2018-04-23 | A kind of three-point bending vibrating fatigue device with axial tension function |
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| CN208254934U true CN208254934U (en) | 2018-12-18 |
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ID=64637956
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| CN201820577318.XU Expired - Fee Related CN208254934U (en) | 2018-04-23 | 2018-04-23 | A kind of three-point bending vibrating fatigue device with axial tension function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362554A (en) * | 2018-04-23 | 2018-08-03 | 中国人民解放军空军工程大学 | A kind of three-point bending vibrating fatigue device with axial tension function |
| CN110333134A (en) * | 2019-07-04 | 2019-10-15 | 西北工业大学 | Uniaxial stretching device and experimental method associated with a kind of and neutron scattering |
| CN112393988A (en) * | 2020-11-03 | 2021-02-23 | 太原科技大学 | Novel device for thin strip tension bending experiment |
-
2018
- 2018-04-23 CN CN201820577318.XU patent/CN208254934U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362554A (en) * | 2018-04-23 | 2018-08-03 | 中国人民解放军空军工程大学 | A kind of three-point bending vibrating fatigue device with axial tension function |
| CN110333134A (en) * | 2019-07-04 | 2019-10-15 | 西北工业大学 | Uniaxial stretching device and experimental method associated with a kind of and neutron scattering |
| CN112393988A (en) * | 2020-11-03 | 2021-02-23 | 太原科技大学 | Novel device for thin strip tension bending experiment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181218 Termination date: 20210423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |