CN110987651A - A nut compression type low temperature fatigue device - Google Patents
A nut compression type low temperature fatigue device Download PDFInfo
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- CN110987651A CN110987651A CN201911388240.2A CN201911388240A CN110987651A CN 110987651 A CN110987651 A CN 110987651A CN 201911388240 A CN201911388240 A CN 201911388240A CN 110987651 A CN110987651 A CN 110987651A
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- block
- clamp
- shaft sleeve
- main body
- guide
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- 230000006835 compression Effects 0.000 title description 8
- 238000007906 compression Methods 0.000 title description 8
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000009661 fatigue test Methods 0.000 abstract description 5
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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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- 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
-
- 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
-
- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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- Physics & Mathematics (AREA)
- 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
本发明涉及一种用于实际环境下板状、片状试件的定位夹持装置，确切地说是一种螺母压紧式低温疲劳装置。属于机械零部件疲劳试验技术领域。该装置包括夹头、传动机构。上述夹头主要由夹具主体构成；传动机构包括压杆、顶块及提升轴套。所述的夹具主体内设有导向快，导向快通过螺栓与夹具主体连接；所述的传动机构由压杆的伸缩实现传动。压杆的下端与夹具接头连接，是整个装置与试验机的连接纽带，夹具接头可夹入试验机的钳口内。具有耐低温、湿热、高压等环境及可减小在环境影响下试验设备出现误差的特点。
The invention relates to a positioning and clamping device for plate-shaped and sheet-shaped test pieces in actual environment, specifically a nut-pressing low-temperature fatigue device. It belongs to the technical field of fatigue testing of mechanical parts. The device includes a chuck and a transmission mechanism. The above-mentioned chuck is mainly composed of the main body of the fixture; the transmission mechanism includes a pressing rod, a top block and a lifting shaft sleeve. The main body of the fixture is provided with a guide, which is connected with the main body of the fixture through bolts; the transmission mechanism is realized by the expansion and contraction of the pressure rod. The lower end of the pressing rod is connected with the fixture joint, which is the connection link between the whole device and the testing machine, and the fixture joint can be clamped into the jaw of the testing machine. It has the characteristics of resistance to low temperature, damp heat, high pressure and other environments and can reduce the error of the test equipment under the influence of the environment.
Description
Technical Field
The invention relates to a positioning and clamping device for a plate-shaped and sheet-shaped test piece in an actual environment, in particular to a nut compression type low-temperature fatigue device. Belongs to the technical field of mechanical part fatigue tests.
Background
The mechanical structure clamp is widely applied to the field of static fatigue tests, the properties of internal materials of mechanical parts can be changed in the environments of low temperature, damp heat, high pressure and the like, and a screw and nut assembling mechanism can be used for testing the fatigue performance of the materials of the mechanical parts in different environments. In a test, a clamp body pull rod is clamped into a round jaw of a testing machine, a test load is guaranteed through the tightening of a nut, and on one hand, the positioning is carried out, so that a workpiece is determined to be in a correct state in a clamp; and on the other hand, the clamping is carried out, and the workpiece is fixed after being positioned, so that the positioning position of the workpiece is kept unchanged in the machining process. However, the common screw and nut assembling mechanism can only provide a static test environment influenced by the tension of the test piece, and cannot reflect the change characteristics of the test piece under the action of the pressure and the dynamic load, namely, the change of the test piece under the actual working state cannot be completely simulated, so that the test result has errors, and the mechanism has strong limitation.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention designs the nut compression type low-temperature fatigue device which can realize the positioning and clamping of the test piece in the environments of tension, compression and dynamic load of the test piece aiming at the improvement of the prior screw nut assembling mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme: a nut compression type low-temperature fatigue device comprises a chuck and a transmission mechanism. The chuck is mainly composed of a clamp main body; the transmission mechanism comprises a pressure lever, a top block and a lifting shaft sleeve.
The inside of the clamp main body is provided with a guide block, and the guide block is connected with the clamp main body through a bolt;
furthermore, the guide block is connected with a clamping block with a guide rail, the clamping block is clamped on the ejector block, the guide block is driven to move quickly when the ejector block moves, and clamping work of the clamping block is achieved under the limitation of the guide rail of the clamping block and the positioning hole of the clamp main body.
The transmission mechanism realizes transmission by the extension of the pressure lever. The structure is as follows: the top end of the pressure rod is connected with the ejector block through threads, the lifting shaft sleeve is connected with the pressure rod through threads, and the stretching of the pressure rod is realized by rotating the lifting shaft sleeve, so that the chuck is driven to complete clamping work. The upper half part of the guide shaft sleeve is connected with the fixed clamp main body through threads, and the connecting holes of the pressure lever and the clamp main body are ensured to be on the same axis; the lower half part of the guide shaft sleeve is connected with the pressure lever, so that the threads of the pressure lever can be protected, and the guide effect is achieved.
Furthermore, the lower end of the pressure rod is connected with the clamp connector through threads, the pressure rod is a connecting link of the whole device and the testing machine, the clamp connector can be clamped into the jaw of the testing machine, and the handles are connected with the two sides of the lifting shaft sleeve through threads, so that the use of an operator is facilitated.
The invention has the advantages and characteristics that: through using nut pressing mode low temperature fatigue device, can realize the fatigue test of test piece under tension, pressure and dynamic load to the device itself receives environmental impact very little, can reduce the test error. The device also considers the convenience of operation, has improved the efficiency of construction, can realize quick function of going on fitting, location and pressing from both sides tightly. The device has the characteristics of low temperature resistance, damp and hot resistance, high pressure resistance and the like, and can reduce the error of test equipment under the influence of the environment. Can be widely applied to the technical field of mechanical part fatigue tests.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view of fig. 1.
Shown in the figure:
1-a guide block; 2-clamping a block; 3-a top block; 4-a clamp body; 5-a guide shaft sleeve; 6-lifting the shaft sleeve; 7-a compression bar; 8-clamp joint; 9-handle.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-2, a nut compression type low-temperature fatigue device comprises a chuck and a transmission mechanism. The chuck is mainly composed of a clamp body 4; the transmission mechanism comprises a pressure lever 7, a top block 3 and a lifting shaft sleeve 6.
A guide block 1 is arranged in the clamp main body 4, and the guide block 1 is connected with the clamp main body 4 through a bolt;
the guide block 1 is connected with a clamping block 2 with a guide rail, the clamping block 2 is clamped on the ejector block 3, the guide block 1 is driven to move when the ejector block 3 moves, and clamping work of the clamping block 2 is achieved under the limitation of the guide rail of the clamping block 2 and the positioning hole of the clamp body 4.
The transmission mechanism realizes transmission by the extension and contraction of the pressure lever 7. The structure is as follows: the top end of the pressure rod 7 is connected with the top block 3 through threads, the lifting shaft sleeve 6 is connected with the pressure rod 7 through threads, and the stretching of the pressure rod 7 is realized by rotating the lifting shaft sleeve 6, so that a chuck is driven to complete clamping work. The upper half part of the guide shaft sleeve 5 is connected and fixed with the clamp body 4 through threads, and the connecting hole of the pressure lever 7 and the clamp body 4 is ensured to be on the same axis; the lower half part of the guide shaft sleeve 5 is connected with the pressure lever 7, so that the thread of the pressure lever 7 can be protected, and the guide effect is achieved.
The lower end of the pressure lever 7 is connected with the clamp joint 8 through threads, the lower end is a connecting link of the whole device and the testing machine, the clamp joint 8 can be clamped in a jaw of the testing machine, and the handles 9 are arranged on two sides of the lifting shaft sleeve 6 through threaded connection, so that the use of an operator is facilitated.
The nut compression type low-temperature fatigue device designed by the invention can better fit the stress characteristics of a test piece in an actual environment, and can realize the functions of fitting, positioning and clamping quickly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a nut compresses tightly formula low temperature fatigue device which characterized in that: the clamp comprises a clamp head and a transmission mechanism, wherein the clamp head mainly comprises a clamp main body; the transmission mechanism comprises a pressure rod, a top block and a lifting shaft sleeve, a guide block is arranged in the clamp main body, and the guide block is connected with the clamp main body through a bolt; the transmission mechanism realizes transmission by the extension of the pressure lever.
2. The nut-clinching cryogenic fatigue device of claim 1, wherein: the guide block is connected with a clamping block with a guide rail, the clamping block is clamped on the ejector block, the guide block is driven to move quickly when the ejector block moves, and clamping work of the clamping block is achieved under the limitation of the guide rail of the clamping block and a positioning hole of the clamp main body.
3. The nut-clinching cryogenic fatigue device of claim 1, wherein: the top end of the pressure rod is connected with the top block through threads, the lifting shaft sleeve is connected with the pressure rod through threads and achieves stretching of the pressure rod through rotation of the lifting shaft sleeve, the upper half portion of the guide shaft sleeve is connected with the fixing clamp body through threads, and the lower half portion of the guide shaft sleeve is connected with the pressure rod.
4. The nut-clinching cryogenic fatigue device of claim 1, wherein: the lower end of the pressure lever is connected with a clamp joint through threads, the clamp joint is clamped in a jaw of the testing machine, and the handles are connected on two sides of the lifting shaft sleeve through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388240.2A CN110987651A (en) | 2019-12-30 | 2019-12-30 | A nut compression type low temperature fatigue device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388240.2A CN110987651A (en) | 2019-12-30 | 2019-12-30 | A nut compression type low temperature fatigue device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110987651A true CN110987651A (en) | 2020-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911388240.2A Withdrawn CN110987651A (en) | 2019-12-30 | 2019-12-30 | A nut compression type low temperature fatigue device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110987651A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111194A (en) * | 2014-06-20 | 2014-10-22 | 天津大学 | Clamp for connecting fatigue testing machine and welding guide rail test piece |
| CN106840867A (en) * | 2017-04-05 | 2017-06-13 | 北京航空航天大学 | The drawing by high temperature fatigue test clamper and method of a kind of flat test piece |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN206557029U (en) * | 2017-01-13 | 2017-10-13 | 西北工业大学 | One kind rotation air film cooled thermograde thermal mechanical fatigue pilot system |
| CN207439811U (en) * | 2017-11-07 | 2018-06-01 | 武汉钢铁有限公司 | Automotive sheet high-cycle fatigue test fixture |
| CN108548716A (en) * | 2018-04-02 | 2018-09-18 | 北京航空航天大学 | A kind of pole test specimen high temperature push-pull fatigue test cramp and test method |
| CN110987650A (en) * | 2019-12-30 | 2020-04-10 | 沈阳航空航天大学 | Voussoir compresses tightly formula low temperature fatigue anchor clamps |
-
2019
- 2019-12-30 CN CN201911388240.2A patent/CN110987651A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111194A (en) * | 2014-06-20 | 2014-10-22 | 天津大学 | Clamp for connecting fatigue testing machine and welding guide rail test piece |
| CN206557029U (en) * | 2017-01-13 | 2017-10-13 | 西北工业大学 | One kind rotation air film cooled thermograde thermal mechanical fatigue pilot system |
| CN106840867A (en) * | 2017-04-05 | 2017-06-13 | 北京航空航天大学 | The drawing by high temperature fatigue test clamper and method of a kind of flat test piece |
| CN106885729A (en) * | 2017-04-05 | 2017-06-23 | 北京航空航天大学 | The high temperature push-pull fatigue test cramp and method of a kind of flat test piece |
| CN207439811U (en) * | 2017-11-07 | 2018-06-01 | 武汉钢铁有限公司 | Automotive sheet high-cycle fatigue test fixture |
| CN108548716A (en) * | 2018-04-02 | 2018-09-18 | 北京航空航天大学 | A kind of pole test specimen high temperature push-pull fatigue test cramp and test method |
| CN110987650A (en) * | 2019-12-30 | 2020-04-10 | 沈阳航空航天大学 | Voussoir compresses tightly formula low temperature fatigue anchor clamps |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200410 |