CN112730039A - Low-temperature tensile test device - Google Patents
Low-temperature tensile test device Download PDFInfo
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- CN112730039A CN112730039A CN202110137916.1A CN202110137916A CN112730039A CN 112730039 A CN112730039 A CN 112730039A CN 202110137916 A CN202110137916 A CN 202110137916A CN 112730039 A CN112730039 A CN 112730039A
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- lower die
- tensile test
- hole
- temperature tensile
- barrel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The low-temperature tensile test device comprises an outer sleeve barrel, wherein a lower die sleeve is arranged at a through hole at the bottom of the outer sleeve barrel, a lower die fixture is placed in the lower die sleeve, an inlet of an upper die fixture is arranged at the top of the outer sleeve barrel, and the upper die fixture is connected with the upper die sleeve. The low-temperature tensile test device provided by the invention can be mounted on a universal testing machine for use by utilizing a simple device, and solves the problems that the existing device is unstable in test process, inaccurate in test result or incapable of meeting test requirements and the like when the existing device is used for carrying out tensile test in a low-temperature liquid nitrogen environment.
Description
Technical Field
The invention belongs to the technical field of test instruments, and particularly relates to a tensile test device in a low-temperature liquid nitrogen environment.
Background
In a low-temperature liquid nitrogen tensile test, the structure and the stability of a low-temperature tensile device play a key role in the accuracy of a test result. In a tensile test with specific requirements, in order to meet the specific requirements of the test, a low-temperature tensile device needs to be improved to achieve the required precision of the test result, and a currently used low-temperature tensile test mold often affects the precision of the low-temperature tensile test, so that designing a low-temperature tensile test device with a wide application range and more stable and accurate test results becomes a current research hotspot.
Disclosure of Invention
The invention aims to provide a low-temperature tensile test device, which solves the problem that the test result is inaccurate due to the unstable test process of the conventional device for performing a tensile test in a low-temperature liquid nitrogen environment by using a simple device.
The invention adopts the technical scheme that the low-temperature tensile test device comprises an outer sleeve barrel, wherein a barrel cover is arranged at the top of the outer sleeve barrel, a first through hole is formed in the barrel cover, a second through hole is formed in the bottom of the outer sleeve barrel, the first through hole corresponds to the second through hole in position, a lower die sleeve is arranged on the inner side of the bottom of the outer sleeve barrel and corresponds to the second through hole, a lower die clamp is arranged in the lower die sleeve, a lower die shaft is arranged on the outer side of the bottom of the outer sleeve and corresponds to the second through hole, and the lower die shaft penetrates through the second through hole and is connected with the bottom of the lower die sleeve;
still include mould anchor clamps, go up mould anchor clamps follow pass in the first through-hole and with lower mould anchor clamps are relative it is connected with the mould connecting rod to go up mould anchor clamps top, the other end of going up the mould connecting rod is connected with the mould axle.
The present invention is also characterized in that,
the lower die sleeve is connected with the lower die clamp through a first pin.
The upper die connecting rod is connected with the upper die shaft through a second pin.
The lower die sleeve is of a groove structure
The outer barrel is a heat-insulating barrel.
The inner part of the barrel wall of the outer barrel is provided with a heat preservation interlayer.
The heat preservation interlayer is a cotton filling layer.
The lower die sleeve is in clearance fit with the lower die clamp.
The invention has the beneficial effects that:
(1) according to the low-temperature tensile test device, the tensile sample can be soaked in liquid nitrogen through the upper die and the lower die, and the heat-preservation tank is matched, so that the sample is completely soaked at the liquid nitrogen temperature to meet the temperature requirement, and the obtained result is high in accuracy during testing.
(2) The overall structural design of the low-temperature tensile test device provided by the invention completely meets the characteristics of a tensile test, so that the precision of the obtained result is high when the test is carried out.
Drawings
FIG. 1 is a cross-sectional view of an apparatus for low temperature tensile testing in accordance with the present invention;
FIG. 2 is a schematic view of a lower die shaft for a low temperature tensile test apparatus of the present invention;
FIG. 3 is a schematic view of a lower die sleeve for a low temperature tensile testing apparatus of the present invention;
FIG. 4 is a schematic view of a lower die fixture for a low temperature tensile test apparatus of the present invention;
FIG. 5 is a schematic view of an outer jacket barrel for a low temperature tensile test apparatus of the present invention;
in the figure, 1, a lower die shaft, 2, a fastening bolt, 3, a lower die sleeve, 4, a first pin, 5, a lower die clamp, 6, an outer sleeve barrel, 7, an upper die clamp, 8, an upper die connecting rod, 9, a second pin, 10, an upper die shaft, 11, a barrel cover, 12, a heat insulation interlayer, 13, a first through hole, 14, a through hole and a second through hole
Detailed Description
The low-temperature tensile test apparatus according to the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, a device for low-temperature tensile test comprises an outer sleeve barrel 6, a barrel cover 11 is arranged at the top of the outer sleeve barrel 6, a first through hole 13 is arranged on the barrel cover 11 as shown in fig. 5, a second through hole 14 is arranged at the bottom of the outer sleeve barrel 6, a lower die sleeve 3 is arranged at the position of the second through hole 14, the first through hole 13 corresponds to the position of the second through hole 14, the lower die sleeve 3 is in a groove structure as shown in fig. 3, a lower die clamp 5 is arranged in the lower die sleeve 3, one end of the lower die clamp 5 as shown in fig. 4 is provided with a radial through hole, the other end of the lower die clamp 5 is provided with a clamping groove, the lower die clamp 5 and the lower die sleeve 3 are fixedly connected together through a pin 4, the lower die sleeve 4 is fixedly connected with a lower die shaft 1 at the position of the second through hole 14, a specific structure of the.
An upper die clamp 7 which moves vertically is arranged at the first through hole 13, a clamping groove is formed in one end of the upper die clamp 7, the other end of the upper die clamp 7 is fixedly connected with one end of an upper die connecting rod 8, and the other end of the upper die connecting rod 8 is connected with one end of an upper die shaft 10 through a second pin 9.
In order to reduce the influence of components in the testing device on the testing precision, the lower die sleeve 3 is in clearance fit with the lower die clamp 5.
In order to ensure the temperature and meet the test requirements, the outer barrel 6 is a heat-insulating barrel, the barrel body is provided with a heat-insulating interlayer 12, and a certain amount of cotton is added into the heat-insulating interlayer 12 for heat insulation.
In order to ensure the temperature operation of the test device and small error, the lower die shaft (1) is in clearance fit with the through hole at the bottom of the outer sleeve barrel (6).
The working principle of the invention is as follows: after connecting all the components completely, adjusting the universal testing machine to enable the upper die clamp 7 and the lower die clamp 5 to be in proper positions, placing a sample between a clamping groove of the upper die sleeve 7 and a clamping groove of the lower die clamp 5, opening the barrel cover 11 according to the requirement of the sample according to the common tensile sample shape standard, pouring liquid nitrogen, covering the barrel cover 11, sealing the outer barrel 6, beginning the test after soaking for several minutes and recording data.
Through the mode, the low-temperature tensile test device provided by the invention utilizes a simple device, and solves the problem that the test result is inaccurate due to the unstable test process of the conventional device for performing the tensile test in the low-temperature liquid nitrogen environment. The tensile sample is soaked in liquid nitrogen through the upper die and the lower die, and the sample is completely soaked at the liquid nitrogen temperature by being matched with the heat-preservation tank, so that the temperature requirement is met, and the obtained result has high accuracy when the test is carried out. The overall structural design of the device completely meets the characteristics of a tensile test, so that the obtained result has high accuracy in the test.
Claims (8)
1. The low-temperature tensile test device is characterized by comprising an outer sleeve barrel (6), wherein a barrel cover (11) is arranged at the top of the outer sleeve barrel (6), a first through hole (13) is formed in the barrel cover (11), a second through hole (14) is formed in the bottom of the outer sleeve barrel (6), the first through hole (13) corresponds to the second through hole (14), a lower die sleeve (3) is arranged on the inner side of the bottom of the outer sleeve barrel (6) corresponding to the second through hole (14), a lower die clamp (5) is arranged in the lower die sleeve (3), a lower die shaft (1) is arranged on the outer side of the bottom of the outer sleeve (6) corresponding to the second through hole (14), and the lower die shaft (1) penetrates through the second through hole (14) to be connected with the bottom of the lower die sleeve (3);
still include mould anchor clamps (7), go up mould anchor clamps (7) follow pass in first through-hole (13) and with lower mould anchor clamps (5) are relative it is connected with mould connecting rod (8) to go up mould anchor clamps (7) top, the other end of going up mould connecting rod (8) is connected with mould axle (10).
2. A low temperature tensile test apparatus according to claim 1, wherein said lower die case (3) is connected to said lower die holder (5) by means of a first pin (4).
3. A low temperature tensile test apparatus according to claim 1, wherein said upper die link (8) is connected to the upper die shaft (10) by a second pin (9).
4. A low temperature tensile test apparatus according to claim 1, wherein said lower die sleeve (3) is of a grooved configuration.
5. A low temperature tensile test apparatus according to claim 1, wherein said outer jacket drum (6) is a thermal insulating drum.
6. A low temperature tensile test apparatus according to claim 5, wherein the inner part of the wall of the outer jacket barrel (6) is provided with a heat insulation interlayer (12).
7. A low temperature tensile test apparatus according to claim 6, wherein said insulating sandwich layer (12) is a cotton wadding layer.
8. A low temperature tensile test apparatus according to claim 2, wherein said lower die sleeve (3) is clearance fitted to said lower die holder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110137916.1A CN112730039A (en) | 2021-02-01 | 2021-02-01 | Low-temperature tensile test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110137916.1A CN112730039A (en) | 2021-02-01 | 2021-02-01 | Low-temperature tensile test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112730039A true CN112730039A (en) | 2021-04-30 |
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ID=75595079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110137916.1A Pending CN112730039A (en) | 2021-02-01 | 2021-02-01 | Low-temperature tensile test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112730039A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331374A (en) * | 2011-06-09 | 2012-01-25 | 振石集团东方特钢股份有限公司 | Low-temperature tensile test device for metal material |
| CN202853971U (en) * | 2012-10-18 | 2013-04-03 | 天津大学 | Ultralow-temperature steel bar tension test auxiliary device |
| CN103344505A (en) * | 2013-07-10 | 2013-10-09 | 南京钢铁股份有限公司 | Low-temperature stretching test system for twisted steel |
| CN107796708A (en) * | 2017-11-29 | 2018-03-13 | 东北大学 | A kind of 196 DEG C of tensile test of metallic materials devices |
| CN107991175A (en) * | 2017-11-20 | 2018-05-04 | 西北工业大学 | A kind of room temperature for high pressure torsion tensile sample, cryogenic tensile fixture |
| KR20200035527A (en) * | 2018-09-27 | 2020-04-06 | 현대제철 주식회사 | Jig for griping sample for cryogenic tensile test and cryogenic tensile test device having the same |
-
2021
- 2021-02-01 CN CN202110137916.1A patent/CN112730039A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331374A (en) * | 2011-06-09 | 2012-01-25 | 振石集团东方特钢股份有限公司 | Low-temperature tensile test device for metal material |
| CN202853971U (en) * | 2012-10-18 | 2013-04-03 | 天津大学 | Ultralow-temperature steel bar tension test auxiliary device |
| CN103344505A (en) * | 2013-07-10 | 2013-10-09 | 南京钢铁股份有限公司 | Low-temperature stretching test system for twisted steel |
| CN107991175A (en) * | 2017-11-20 | 2018-05-04 | 西北工业大学 | A kind of room temperature for high pressure torsion tensile sample, cryogenic tensile fixture |
| CN107796708A (en) * | 2017-11-29 | 2018-03-13 | 东北大学 | A kind of 196 DEG C of tensile test of metallic materials devices |
| KR20200035527A (en) * | 2018-09-27 | 2020-04-06 | 현대제철 주식회사 | Jig for griping sample for cryogenic tensile test and cryogenic tensile test device having the same |
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