CN103604691A - Four-point bending test clamp - Google Patents
Four-point bending test clamp Download PDFInfo
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- CN103604691A CN103604691A CN201310629409.5A CN201310629409A CN103604691A CN 103604691 A CN103604691 A CN 103604691A CN 201310629409 A CN201310629409 A CN 201310629409A CN 103604691 A CN103604691 A CN 103604691A
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Abstract
The invention discloses a four-point bending test clamp used for measuring the bending performance of test pieces, and the four-point bending test clamp is detachably installed on an universal tester or a press for four-point bending experiments. The four-point bending test clamp comprises a supporting part and a loading part; the upper surface of a bottom plate in the supporting part is provided with multiple second screwed hole groups arranged along the length direction of a test piece at equal intervals, and two adjustable bearers are adjusted by the screwed hole groups for adjusting the distance between the two adjustable bearers and further for adjusting the span between two supporting rollers; at least two first screwed hole groups are arranged along the length direction of the test piece at equal intervals and at each of the two sides of the surface facing to the test piece of a loading main body in the loading part; and a pressing roller unit employs screws corresponding to the first screwed hole group for selective screwing with screwed holes and further for adjusting the span between the two supporting rollers. The provided four-point bending test clamp installed on the universal tester or the press for measuring the bending performance of the test piece has the characteristics of being simple in structure and convenient to dismount and mount while helping to guarantee the test precision.
Description
Technical field
The present invention relates to a kind of fixture, be specifically related to a kind of for measuring the four-point bending test fixture of test specimen bending property.
Background technology
Four-point bending test, for recording the characteristic parameters such as yield strength, elastic modulus of nonmetallic materials and metal material, is one of basic skills of mechanical property of materials test.Conventionally four-point bending experiment need to be carried out on four-point bending universal testing machine, although four-point bending universal testing machine is widely used at engineering field, four-point bending universal testing machine function singleness, cost is higher, and need to take certain space, economy is not strong.Due to universal testing machine or pressing machine identical with basic structure and the principle of work of four-point bending universal testing machine, therefore, after the holder part of universal testing machine or pressing machine is reequiped, also can carry out four-point bending experiment, thereby the function of expansion universal testing machine or pressing machine, improves service efficiency.Current universal testing machine or pressing machine, due to the fixture construction of worktable, cannot carry out four-point bending experiment, so prior art lacks a kind of four-point bending test fixture that is arranged on universal testing machine or pressure airborne measurements test specimen bending property.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind ofly for measuring the four-point bending test fixture of test specimen bending property, can be removably mounted on and on universal testing machine or pressing machine, carry out four-point bending experiment.
In order to achieve the above object, the present invention has adopted following technical scheme:
A kind of for measuring the four-point bending test fixture of test specimen bending property, be arranged between the worktable and loading end of universal testing machine or pressing machine, there is such feature: comprising: support, be positioned at test specimen below for supporting test specimen, comprise the base plate being removably mounted on worktable, two are fixed on base plate near the support with adjustable at two ends, and two rollers that is separately positioned on the top of each support with adjustable, and loading portion, be positioned at test specimen top to the test specimen load of exerting pressure, comprise two compression roller units that directly contact with test specimen and be removably mounted on the loading body on universal testing machine loading end, wherein, load body and in the surperficial both sides towards test specimen, be respectively provided with at least two groups along the equidistant first threaded hole group of arranging of length direction of test specimen, compression roller unit is connected with loading body by the screw corresponding with the first threaded hole group, screw selectively and the first threaded hole screw to regulate two span Ls between pressure roller portion, base plate is provided with equidistant the second threaded hole group of arranging of at least one group of length direction along test specimen, support with adjustable by with corresponding being bolted on base plate of the second threaded hole group, base plate is also provided with the feather key that a length direction along test specimen extends, the bottom of support with adjustable is provided with the groove corresponding with feather key, two support with adjustables move to regulate two the span Ld between roller along feather key.
In four-point bending test fixture provided by the invention, can also there is such feature: wherein, support also comprises two screw rods that are positioned at base plate top and extend along the length direction of test specimen, two screw rods run through respectively the both sides of support with adjustable, between support with adjustable and screw rod, pass through fastening nuts.
In four-point bending test fixture provided by the invention, can also there is such feature: wherein, load body and comprise for the oscillating deck of fixing compression roller unit and oscillating deck be connected to the upper junction plate of universal testing machine loading end.
In four-point bending test fixture provided by the invention, can also there is such feature: wherein, the second threaded hole group comprises two threaded holes that are separately positioned on feather key both sides.
In four-point bending test fixture provided by the invention, can also there is such feature: wherein, support with adjustable is provided with at the position contacting with a roller baffle plate that a restriction roller moves.
In four-point bending test fixture provided by the invention, can also there is such feature: wherein, compression roller unit comprises the pressure roller paralleling with a roller and the pressure roller bearing that the two ends of pressure roller is connected to oscillating deck, and pressure roller bearing is provided with the baffle plate that restriction pressure roller moves at the position contacting with pressure roller.
Effect and the effect of invention
According to four-point bending test fixture provided by the invention, base plate is removably mounted on worktable, support with adjustable by bolted on base plate, two rollers are separately fixed at the top of two support with adjustables, the upper surface of base plate is provided with equidistant the second threaded hole group of arranging of the some groups of length directions along test specimen, between two support with adjustables, by threaded hole group, regulate distance each other, two rollers are arranged on respectively the top of two support with adjustables, span between such two rollers can be determined, span between two rollers does not readjust while not needing to test at every turn, loading body is removably mounted on universal testing machine loading end, load body and in the surperficial both sides towards test specimen, be respectively provided with at least two groups along the equidistant first threaded hole group of arranging of length direction of test specimen, compression roller unit is connected with loading body by the screw corresponding with the first threaded hole group, screw selectively and the first threaded hole screw to regulate two spans between pressure roller portion, the span between two pressure rollers does not readjust while not needing to test at every turn, therefore, the present invention can provide a kind of four-point bending test fixture that is arranged on universal testing machine or pressure airborne measurements test specimen bending property, when guaranteeing experiment degree of accuracy, have simple in structure, remove and install feature easily.
Accompanying drawing explanation
Fig. 1 is the structural representation of four-point bending test fixture in embodiments of the invention;
Fig. 2 is the structural representation of support in four-point bending test fixture;
Fig. 3 is the structural representation of the corresponding part of letter b in Fig. 1;
Fig. 4 is the structural representation of the corresponding part of alphabetical A in Fig. 1;
Fig. 5 is the structural representation of upper connector in support portion; And
Fig. 6 is the structural representation of oscillating deck in support portion.
In figure, 100., 1. test specimen, 2. support, 3. loading portion, 4. base plate, 5. support with adjustable, 6. a roller, 7. feather key, 8. screw rod, 9. baffle plate, 10. compression roller unit, 11. load bodies, 12. upper connectors, 13. oscillating decks, 14. pressure rollers, 15. pressure roller bearings, 16. baffle plates, 17. first threaded hole groups, 18. second threaded hole groups.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, following examples are specifically addressed the present invention by reference to the accompanying drawings.
Embodiment
Fig. 1 is the structural representation of four-point bending test fixture in embodiments of the invention.
As shown in Figure 1, the four-point bending test fixture 100 in the present embodiment, comprising: support 2 and loading portion 3.
Support 2 is positioned at the below of test specimen 1, for supporting test specimen 1.
Loading portion 2 is positioned at the top of test specimen 1, to test specimen 1 load of exerting pressure.
Loading portion 3 comprises two compression roller units that directly contact with test specimen 1 10 and is removably mounted on the loading body 11 on the loading end of universal testing machine or pressing machine.
Fig. 2 is the structural representation of support portion in four-point bending test fixture.
As shown in 2 figure, support portion 2 comprises the base plate 4 that is removably mounted on worktable, two and is fixed on the screw rod 8 that base plate 4 is positioned at base plate 4 tops and extends along the length direction of test specimen 1 near the support with adjustable 5 at two ends, two rollers 6 that is separately positioned on each support with adjustable 5 top and two.
The upper surface of base plate 4 is provided with equidistant the second threaded hole group 18 of arranging of the some groups of length directions along test specimen 1, support with adjustable 5 by with corresponding being bolted on base plate 4 of the second threaded hole group 18.
On base plate 4, be also provided with the feather key 7 that a length direction along test specimen 1 extends, feather key 7 is positioned at the centre of base plate 4, each second threaded hole group 18 comprises two threaded holes that are separately positioned on feather key 7 both sides, the centre position, bottom of support with adjustable 5 is provided with the groove corresponding with feather key 7, two support with adjustables 5 move to regulate two the span Ld between roller 6 along feather key 7, two screw rods 8 run through respectively the both sides of support with adjustable 5, between support with adjustable 5 and screw rod 8, pass through fastening nuts.
Fig. 3 is the structural representation of the corresponding part of letter b in Fig. 1.
As shown in Figures 2 and 3, support with adjustable 5 is provided with at the position contacting with a roller 6 baffle plate 9 that a restriction roller 6 moves.
Fig. 4 is the structural representation of the corresponding part of alphabetical A in Fig. 1.
As shown in Figure 1 and Figure 4, compression roller unit 10 comprises the pressure roller 14 paralleling with a roller 6 and the pressure roller bearing 15 that the two ends of pressure roller 14 is connected to oscillating deck 13, and pressure roller bearing 15 is provided with the baffle plate 16 that restriction pressure roller 14 moves at the position contacting with pressure roller 14.
Loading body 11 in Fig. 1 comprises for the oscillating deck 13 of fixing compression roller unit 10 and oscillating deck 13 is connected to the upper connector 12 of loading end, between upper connector 12 and oscillating deck 13, passes through screw fastening.
Fig. 5 is the structural representation of upper connector in support portion.
As shown in Figure 5, the top of upper connector 12 is offered two for by the shoulder hole of bolt-through, and upper connector is bolted on universal testing machine or pressing machine loading end.
Fig. 6 is the structural representation of oscillating deck in support portion.
As shown in Figure 4 and Figure 6, oscillating deck 13 is respectively provided with equidistant the first threaded hole group 17 of arranging of the some groups of length directions along test specimen 1 in the surperficial both sides towards test specimen 1, pressure roller bearing 15 is connected with oscillating deck 13 by the screw corresponding with the first threaded hole group 17, and the threaded hole of screw selectively and in the first threaded hole group 17 screws to regulate two span Ls between pressure roller bearing 15.
Before test, base plate 3 is placed on the worktable of universal testing machine or pressing machine, two rollers 6 are arranged on respectively the top of support with adjustable 5, two spans that support with adjustable 5 regulates each other by the second threaded hole group 18 along feather key 7, the span Ld between two of so just a making roller 6 is determined.Test specimen 1 is supported by two rollers 6, and oscillating deck 13 is connected to the loading end of universal testing machine or pressing machine by upper connector 12, and downward load application; Two distances that compression roller unit regulates each other by the first threaded hole group 17 respectively, so just make two span Ls between pressure roller 14 be determined, two pressure rollers 14 are to sample load application.
During test, start universal testing machine or pressing machine oscillating deck 13 is moved down, two pressure rollers 14 are contacted and apply test force with test specimen 1, in sample BENDING PROCESS, a roller 6 and pressure roller 14 all can flexible rotatings.
Two pressure rollers 14 can remain parallel swinging up and down, and can prevent because causing producing between test specimen 1 and pressure roller 9 unsettled because of bending in test specimen 1 pressurized process.
The effect of embodiment and effect
The four-point bending test fixture providing according to the present embodiment, base plate is removably mounted on worktable, support with adjustable by bolted on base plate, two rollers are separately fixed at the top of two support with adjustables, the upper surface of base plate is provided with equidistant the second threaded hole group of arranging of the some groups of length directions along test specimen, between two support with adjustables, by threaded hole group, regulate distance each other, two rollers are arranged on respectively the top of two support with adjustables, span between such two rollers can be determined, span between two rollers does not readjust while not needing to test at every turn, loading body is removably mounted on universal testing machine loading end, load body and in the surperficial both sides towards test specimen, be respectively provided with at least two groups along the equidistant first threaded hole group of arranging of length direction of test specimen, compression roller unit is connected with loading body by the screw corresponding with the first threaded hole group, screw selectively and the first threaded hole screw to regulate two spans between pressure roller portion, the span between two pressure rollers does not readjust while not needing to test at every turn, therefore, the present invention can provide a kind of four-point bending test fixture that is arranged on universal testing machine or pressure airborne measurements test specimen bending property, when guaranteeing experiment degree of accuracy, have simple in structure, remove and install feature easily.
Certainly four-point bending test fixture involved in the present invention is not merely defined in structure in the present embodiment.
Claims (6)
1. for measuring a four-point bending test fixture for test specimen bending property, be arranged between the worktable and testing machine loading end of testing machine, it is characterized in that, comprising:
Support, be positioned at described test specimen below for supporting described test specimen, comprise the base plate that is removably mounted on described worktable, two and be fixed on described base plate near the support with adjustable at two ends, and two rollers that is separately positioned on the top of support with adjustable described in each; And
Loading portion, is positioned at described test specimen top to the described test specimen load of exerting pressure, and comprise two compression roller units that directly contact with described test specimen and be removably mounted on the loading body on described testing machine loading end,
Wherein, described loading body is respectively provided with at least two groups along the equidistant first threaded hole group of arranging of length direction of described test specimen in the surperficial both sides towards described test specimen, described compression roller unit is connected with described loading body by the screw corresponding with described the first threaded hole group, described screw selectively and described the first threaded hole screw to regulate two span Ls between described pressure roller portion
Described base plate is provided with equidistant the second threaded hole group of arranging of at least one group of length direction along described test specimen, described support with adjustable by with corresponding being bolted on described base plate of described the second threaded hole group,
Described base plate is also provided with the feather key that a length direction along described test specimen extends, the bottom of described support with adjustable is provided with the groove corresponding with described feather key, and two described support with adjustables move to regulate the span Ld between a roller described in two along described feather key.
2. four-point bending test fixture according to claim 1, is characterized in that:
Wherein, described support also comprises two screw rods that are positioned at described base plate top and extend along the length direction of described test specimen,
Two described screw rods run through respectively the both sides of described support with adjustable, between described support with adjustable and described screw rod, pass through fastening nuts.
3. four-point bending test fixture according to claim 1, is characterized in that:
Wherein, described loading body comprises for the oscillating deck of fixing described compression roller unit and described oscillating deck is connected to the upper junction plate of described testing machine loading end.
4. four-point bending test fixture according to claim 1, is characterized in that:
Wherein, described the second threaded hole group comprises two threaded holes that are separately positioned on described feather key both sides.
5. four-point bending test fixture according to claim 1, is characterized in that:
Wherein, described support with adjustable is provided with the baffle plate that the described roller of restriction moves at the position contacting with described roller.
6. four-point bending test fixture according to claim 1, is characterized in that:
Wherein, described compression roller unit comprises the pressure roller paralleling with described roller and the pressure roller bearing that the two ends of described pressure roller is connected to described oscillating deck,
Described pressure roller bearing is provided with the baffle plate that the described pressure roller of restriction moves at the position contacting with described pressure roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629409.5A CN103604691A (en) | 2013-11-29 | 2013-11-29 | Four-point bending test clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629409.5A CN103604691A (en) | 2013-11-29 | 2013-11-29 | Four-point bending test clamp |
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| CN103604691A true CN103604691A (en) | 2014-02-26 |
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| CN201310629409.5A Pending CN103604691A (en) | 2013-11-29 | 2013-11-29 | Four-point bending test clamp |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878597A (en) * | 2014-03-17 | 2014-06-25 | 四川省青城机械有限公司 | Reciprocating type sawn timber subdivision saw casting main beam support |
| CN103994932A (en) * | 2014-05-12 | 2014-08-20 | 南通市建筑科学研究院有限公司 | A steel bar bending tester |
| CN104568363A (en) * | 2015-01-06 | 2015-04-29 | 湖南大学 | Dynamic impact test method and device for detecting crashworthiness of automobile parts |
| CN104819901A (en) * | 2015-04-18 | 2015-08-05 | 中煤张家口煤矿机械有限责任公司 | Scraper bending test combination testing device and use method |
| CN104897481A (en) * | 2015-06-12 | 2015-09-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Curve detection device and detection method |
| CN105466770A (en) * | 2014-09-10 | 2016-04-06 | 北京宇航系统工程研究所 | Tension-bending combination load test apparatus |
| CN108362560A (en) * | 2018-01-26 | 2018-08-03 | 西安建筑科技大学 | A kind of drawing of fusion weld seam is cut or the test device and method of compression shear composite bear ability |
| CN108627396A (en) * | 2018-05-04 | 2018-10-09 | 武汉理工大学 | A kind of test method of ultra-thin glass bending strength |
| CN109459304A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of 4 points of curved experimental rigs |
| CN109459305A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
| CN110987680A (en) * | 2019-12-13 | 2020-04-10 | 华中科技大学 | Bending strain generating device and application thereof |
| CN112082855A (en) * | 2020-10-26 | 2020-12-15 | 江西亮弘光电科技有限公司 | Plastic package material bending strength test fixture |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
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| CN201819838U (en) * | 2010-10-14 | 2011-05-04 | 株洲时代新材料科技股份有限公司 | Adjustable clamp of displacement sensor |
| CN102620985A (en) * | 2012-02-07 | 2012-08-01 | 浙江大学 | Electro-hydraulic servo loading device and loading method for adjustable pitch propeller |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878597A (en) * | 2014-03-17 | 2014-06-25 | 四川省青城机械有限公司 | Reciprocating type sawn timber subdivision saw casting main beam support |
| CN103994932A (en) * | 2014-05-12 | 2014-08-20 | 南通市建筑科学研究院有限公司 | A steel bar bending tester |
| CN105466770A (en) * | 2014-09-10 | 2016-04-06 | 北京宇航系统工程研究所 | Tension-bending combination load test apparatus |
| CN104568363A (en) * | 2015-01-06 | 2015-04-29 | 湖南大学 | Dynamic impact test method and device for detecting crashworthiness of automobile parts |
| CN104568363B (en) * | 2015-01-06 | 2017-05-10 | 湖南大学 | Dynamic impact test method and device for detecting crashworthiness of automobile parts |
| CN104819901A (en) * | 2015-04-18 | 2015-08-05 | 中煤张家口煤矿机械有限责任公司 | Scraper bending test combination testing device and use method |
| CN104819901B (en) * | 2015-04-18 | 2017-10-13 | 中煤张家口煤矿机械有限责任公司 | Scraper plate bend test combined measuring device and application method |
| CN104897481A (en) * | 2015-06-12 | 2015-09-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Curve detection device and detection method |
| CN104897481B (en) * | 2015-06-12 | 2018-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Bending detection device and detection method |
| CN108362560B (en) * | 2018-01-26 | 2020-09-04 | 西安建筑科技大学 | Device and method for testing composite bearing capacity of fusion welding line through pulling shearing or pressing shearing |
| CN108362560A (en) * | 2018-01-26 | 2018-08-03 | 西安建筑科技大学 | A kind of drawing of fusion weld seam is cut or the test device and method of compression shear composite bear ability |
| CN108627396A (en) * | 2018-05-04 | 2018-10-09 | 武汉理工大学 | A kind of test method of ultra-thin glass bending strength |
| CN108627396B (en) * | 2018-05-04 | 2020-02-14 | 武汉理工大学 | Method for testing bending strength of ultrathin glass |
| CN109459304A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of 4 points of curved experimental rigs |
| CN109459305A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
| CN110987680A (en) * | 2019-12-13 | 2020-04-10 | 华中科技大学 | Bending strain generating device and application thereof |
| WO2021114731A1 (en) * | 2019-12-13 | 2021-06-17 | 华中科技大学 | Bending strain generating device, and use thereof |
| CN112082855A (en) * | 2020-10-26 | 2020-12-15 | 江西亮弘光电科技有限公司 | Plastic package material bending strength test fixture |
| CN112082855B (en) * | 2020-10-26 | 2024-01-30 | 佛山市金骏田塑料制品有限公司 | Plastic package material bending strength test fixture |
| CN113776958A (en) * | 2021-09-18 | 2021-12-10 | 中车株洲电力机车有限公司 | Roller type bending device for bending test |
| CN113776958B (en) * | 2021-09-18 | 2024-02-06 | 中车株洲电力机车有限公司 | Roller bending device for bending test |
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Application publication date: 20140226 |