In-situ tensile torsion test clamp
By using the structure of the slider and the clamping blocks on the slider and the push blocks on the slider are used in the in-situ tensile torsion test fixture, the troublesome problems in material installation and clamping adjustment are solved, and the tensile accuracy and experimental convenience are improved sex.
Patent Information
- Application Number
- CN202420773032.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-15
AI Technical Summary
When conducting a low-temperature vacuum test of -150 degrees Celsius, the existing in-situ tensile torsion test fixtures are troublesome during material installation and clamping adjustment, and the tensile accuracy is difficult to improve.
A in-situ tensile torsion test fixture was designed, using a structure in which the slider and the clamp and push block on the slider are coordinated with each other, so that the slider can move freely, and at the same time, it does not affect the experimental results during the experiment, so as to facilitate materials installation and clamping parts inspection.
Through this design, the installation and clamping process of materials is significantly simplified, the tensile accuracy and experimental convenience are improved, and the experimental preparation time is reduced.
Smart Images
Figure CN222481981U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of test fixtures, in particular to an in-situ tensile torsion test fixture. Background Art
[0002] With the development and use of microscopic in-situ mechanical testing technology, people's understanding of the mechanical behavior of materials has been significantly improved. This technology gives us the opportunity to directly observe the deformation, strengthening and failure processes at the microscopic scale and conduct in-situ quantitative micromechanical property characterization to understand the relationship between the microstructure and mechanical properties of materials. Compared with traditional independent tensile testing machines, the in-situ (high and low temperature) stretching table placed in the scanning electron microscope can obtain the hardness, modulus, fracture toughness and other properties of materials under relevant conditions; it uses the high-resolution grain and orientation map given by the electron backscatter diffraction of the scanning electron microscope to observe the dynamic surface changes of materials during mechanical property tests such as tension, compression, bending and fatigue, such as slip band generation and fracture initiation.
[0003] The in-situ tensile torsion test fixture is a device commonly used in material mechanical property testing. It can perform tensile and torsion tests on materials under specific conditions. The selection and use of this fixture is very important because it directly affects the accuracy and reliability of the test results.
[0004] When it comes to low-temperature vacuum trials at -150 degrees Celsius, the situation is more complicated. First, this low-temperature environment poses a challenge to the selection of materials, because not all materials can maintain their original mechanical properties at such extreme temperatures. Second, the vacuum environment may have an impact on the material's absorption and degassing properties, which is also a factor that needs to be considered when conducting low-temperature vacuum tests.
[0005] The DKMT200 / 1000 high-performance scientific research-grade low-temperature tensile in-situ tester is designed for this purpose. It can test the mechanical properties of specimen materials at the micro-nano scale, and can integrate imaging equipment such as ordinary microscopes and metallographic microscopes to monitor the microscopic changes of materials in real time.
[0006] However, when conducting stretching and torsion experiments, a stretching part that can slide left and right is required, and a rotating part that can rotate is also required. Therefore, when installing the material, one end of the rotating part is designed to be fixed for ease of use, so it can only rely on the stretching part to move, thereby facilitating installation. However, in order to improve the stretching accuracy, the stretching side is often connected to the screw thread and relies on the screw to move accurately. As a result, every time the material needs to be installed, it is necessary to wait for the stretching side to slowly move to the appropriate position, and then adjust the material clamping, which is very troublesome.
[0007] To this end, we propose an in-situ tensile-torsion test fixture. Utility Model Content
[0008] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides an in-situ tensile torsion test fixture.
[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an in-situ tensile torsion test fixture, comprising an environmental chamber, a base plate is fixedly installed inside the environmental chamber, a tensile drive device is also fixedly installed on the top surface of the base plate, two groups of slide rails are fixedly installed on the opposite sides of the base plate, a group of sliders that can slide along the length of the slide rails are movably installed on the slide rails, a torsion machine is fixedly installed on the other end of the base plate away from the slide rails, a transmission shaft is fixedly installed on the output end of the torsion machine, and clamping parts are fixedly installed on the end surfaces of the transmission shaft and the slider that are close to each other, a sliding block is movably installed on the tensile drive device, the sliding block extends toward the slider on one side of the slider to form a push block, and the slider extends toward the sliding block at a position away from one end of the transmission shaft to form a card block, and the push block and the card block interfere with each other when the slider moves along the slide rail.
[0010] Preferably, the stretching drive device comprises a motor, a screw is fixedly mounted on the output end of the motor, an external thread is formed at the front end of the screw, the sliding block is threadedly connected to the screw and the sliding block is in close contact with the bottom plate.
[0011] Preferably, an avoidance groove is provided on the bottom plate, wherein the avoidance groove is a semicircular groove and the diameter of the avoidance groove is 1.3 times the width of the clamping portion.
[0012] Preferably, a fixing rod is fixedly mounted on the base plate, and the screw rod and the transmission shaft both pass through the fixing rod and are connected to the fixing rod via bearings.
[0013] Preferably, the clamping part includes two groups of clamping plates, one group of the clamping plates is fixed, and the other group of the clamping plates is movable, the clamping plates in the clamping part close to the slider are fixedly mounted on the slider, and the clamping plates in the clamping part close to the transmission shaft are fixedly mounted on the transmission shaft, and a slot is provided on the opposite side of the middle of the clamping plate, and the slot is a polygonal slot.
[0014] Preferably, one group of clamping plates in the same clamping part is fixedly mounted with positioning posts, and another group of clamping plates is provided with positioning grooves for accommodating the sliding of the positioning posts.
[0015] Beneficial Effects
[0016] The utility model provides an in-situ tensile torsion test fixture, which has the following beneficial effects:
[0017] When installing materials, the slider can be freely slid in the direction away from the transmission shaft and the push block, increasing the distance between the two sets of clamping parts, thereby facilitating material clamping. The position of the slider can also be adjusted during the clamping process. Subsequently, the stretching drive device is started, and the stretching drive device drives the sliding block to slide in the direction away from the transmission shaft. During the sliding process, interference occurs with the card block, thereby driving the slider away from the transmission shaft. When doing a torsion experiment, the rotation of the transmission shaft causes the slider to gradually approach the transmission shaft, but due to the interference of the push block, the slider cannot move, so that the experiment can be carried out. Therefore, the card block and the push block on the slider and the sliding block cooperate with each other, so that the slider can move freely without affecting the experiment during the experiment, which facilitates the installation of materials and the inspection of the clamping part. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0021] Figure 2 This is a schematic diagram of the fixture structure of the utility model;
[0022] Figure 3 This is a schematic diagram of the adjustment state structure of the utility model;
[0023] Figure 4 This is a disassembled diagram of the splint structure of the utility model.
[0024] Legend:
[0025] 1. Environmental chamber; 2. Bottom plate; 3. Slide rail; 4. Slider; 5. Twister; 6. Transmission shaft; 7. Clamping plate; 8. Motor; 9. Screw; 10. Avoidance groove; 11. Fixed rod; 12. Sliding block; 13. Block; 14. Push block; 15. Slot; 16. Positioning column; 17. Positioning slot. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] Example: In-situ tensile torsion test fixture, such as Figure 1-Figure 4 As shown, the environmental box 1 includes an environmental box 1, a bottom plate 2 is fixedly installed inside the environmental box 1, an openable sealing window is arranged in front of the environmental box 1, and the interior of the environmental box 1 is connected to a negative pressure machine. When in use, the vacuum degree inside the environmental box 1 is adjusted by the negative pressure machine, and the internal temperature of the environmental box 1 can also be lowered by a refrigeration device to meet the experimental requirements.
[0028] In particular, two groups of slide rails 3 are fixedly installed on the opposite sides of the base plate 2, and a group of sliders 4 that can slide along the length of the slide rails 3 are movably installed on the slide rails 3. A torsion machine 5 is fixedly installed on the other end of the base plate 2 away from the slide rails 3, and a transmission shaft 6 is fixedly installed on the output end of the torsion machine 5. The torsion machine 5 is an existing device and will not be described in detail here. Its main function is to drive the transmission shaft 6 to rotate and perform a torsion test. The end surfaces of the transmission shaft 6 and the slider 4 that are close to each other are fixedly installed with clamping parts. When performing stretching and torsion tests, the material to be tested is clamped on the clamping part, and then the slider 4 is moved away from the transmission shaft 6 for a stretching test, or the slider 4 is kept stationary and the transmission shaft 6 is rotated to perform a torsion test, or the slider 4 is moved and the transmission shaft 6 is rotated to perform a stretching and torsion test.
[0029] Furthermore, in order to facilitate the clamping of the material on the clamping part, a stretching drive device is fixedly installed on the top surface of the bottom plate 2, and a sliding block 12 is movably installed on the stretching drive device. The sliding block 12 extends toward one side of the slider 4 to form a push block 14. The push block 14 is a rectangular block. The slider 4 extends toward the sliding block 12 at a position away from one end of the transmission shaft 6 to form a clamping block 13. The clamping block 13 is a rectangular block. The push block 14 and the clamping block 13 interfere with each other when the slider 4 moves along the slide rail 3. When installing the material, the slider 4 can be freely slid in a direction away from the transmission shaft 6 and the push block 14 to increase the distance between the two sets of clamping parts, thereby facilitating the clamping of the material. During the clamping process, the position of the slider 4 can also be adjusted. Subsequently, the stretching drive device is started, and the stretching drive device drives the sliding block 12 to slide in the direction away from the transmission shaft 6. During the sliding process, interference occurs with the clamping block 13, thereby driving the slider 4 away from the transmission shaft 6. During the torsion experiment, the rotation of the transmission shaft 6 causes the slider 4 to gradually approach the transmission shaft 6, but due to the interference of the push block 14, the slider 4 cannot move, so that the experiment can be carried out. Therefore, the slider 4 and the clamping block 13 and the push block 14 on the sliding block 12 cooperate with each other, so that the slider 4 can move freely without affecting the experiment during the experiment, which facilitates the installation of the material and the inspection of the clamping part.
[0030] Furthermore, the stretching drive device includes a motor 8, a screw rod 9 is fixedly installed at the output end of the motor 8, an external thread is provided at the front end of the screw rod 9, a sliding block 12 is threadedly connected to the screw rod 9 and the sliding block 12 is tightly attached to the base plate 2. When the motor 8 is started, it drives the screw rod 9 to rotate, thereby driving the two groups of sliding blocks 12 to move along the axis of the screw rod 9 to perform a stretching experiment.
[0031] Furthermore, an avoidance groove 10 is opened on the bottom plate 2 . The avoidance groove 10 is a semicircular groove and the diameter of the avoidance groove 10 is 1.3 times the width of the clamping part, so that the clamping part can rotate in the avoidance groove 10 .
[0032] Furthermore, in order to increase the stability of the transmission shaft 6 and the screw rod 9, a fixing rod 11 is fixedly mounted on the base plate 2, and the screw rod 9 and the transmission shaft 6 both pass through the fixing rod 11 and are connected to the fixing rod 11 via bearings.
[0033] Furthermore, the clamping part includes two groups of clamping plates 7, one group of clamping plates 7 is fixed, and the other group of clamping plates 7 is movable. The clamping plates 7 in the clamping part close to the slider 4 are fixedly mounted on the slider 4, and the clamping plates 7 in the clamping part close to the transmission shaft 6 are fixedly mounted on the transmission shaft 6. A slot 15 is provided on the opposite side of the middle of the clamping plate 7, and the slot 15 is a polygonal slot. In the torsion experiment, the slot 15 fixes the two ends of the material so that the material can rotate with the clamping part.
[0034] Furthermore, one set of clamping plates 7 in the same clamping part is fixedly mounted with positioning posts 16, and another set of clamping plates 7 is provided with positioning grooves 17 for accommodating the sliding of the positioning posts 16, so that the two sets of clamping plates 7 will not be misaligned during clamping.
[0035] The working principle of the utility model is as follows: when installing materials, the slider 4 can be freely slid in the direction away from the transmission shaft 6 and the push block 14, increasing the distance between the two groups of clamping parts, thereby facilitating the clamping of materials. The position of the slider 4 can also be adjusted during the clamping process. Subsequently, the stretching drive device is started, and the stretching drive device drives the sliding block 12 to slide in the direction away from the transmission shaft 6. During the sliding process, interference is generated with the clamping block 13, thereby driving the slider 4 away from the transmission shaft 6. When doing a torsion experiment, the rotation of the transmission shaft 6 causes the slider 4 to gradually approach the transmission shaft 6, but due to the interference of the push block 14, the slider 4 cannot move, so that the experiment can be carried out. Therefore, the slider 4 and the clamping block 13 and the push block 14 on the sliding block 12 cooperate with each other, so that the slider 4 can move freely without affecting the experiment during the experiment, thereby facilitating the installation of materials and the inspection of the clamping part.
[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. An in-situ tensile torsion test fixture, comprising an environmental chamber (1), wherein a bottom plate (2) is fixedly installed inside the environmental chamber (1), and a tensile drive device is also fixedly installed on the top surface of the bottom plate (2), characterized in that: Two groups of slide rails (3) are fixedly mounted on opposite sides of the base plate (2); a group of sliders (4) that can slide along the length of the slide rails (3) are movably mounted on the slide rails (3); a torsion machine (5) is fixedly mounted on the other end of the base plate (2) away from the slide rails (3); a transmission shaft (6) is fixedly mounted on the output end of the torsion machine (5); and clamping parts are fixedly mounted on the end surfaces of the transmission shaft (6) and the slider (4) that are close to each other; a sliding block (12) is movably mounted on the stretching drive device; the sliding block (12) extends toward the slider (4) at one side of the slider (4) to form a push block (14); the slider (4) extends toward the sliding block (12) at a position away from one end of the transmission shaft (6) to form a clamping block (13); the push block (14) and the clamping block (13) interfere with each other when the slider (4) moves along the slide rail (3).
2. The in-situ tensile torsion test fixture according to claim 1, characterized in that: The stretching drive device comprises a motor (8), a screw rod (9) is fixedly mounted on the output end of the motor (8), an external thread is provided at the front end of the screw rod (9), the sliding block (12) is threadedly connected to the screw rod (9), and the sliding block (12) is in close contact with the bottom plate (2).
3. The in-situ tensile torsion test fixture according to claim 2, characterized in that: The bottom plate (2) is provided with an escape groove (10), the escape groove (10) is a semicircular groove, and the diameter of the escape groove (10) is 1.3 times the width of the clamping portion.
4. The in-situ tensile torsion test fixture according to claim 3, characterized in that: A fixing rod (11) is also fixedly mounted on the base plate (2), and the screw rod (9) and the transmission shaft (6) both penetrate the fixing rod (11) and are connected to the fixing rod (11) via bearings.
5. The in-situ tensile torsion test fixture according to claim 1, characterized in that: The clamping portion comprises two groups of clamping plates (7), one group of the clamping plates (7) is fixed, and the other group of the clamping plates (7) is movable. The clamping plates (7) in the clamping portion close to the slider (4) are fixedly mounted on the slider (4), and the clamping plates (7) in the clamping portion close to the transmission shaft (6) are fixedly mounted on the transmission shaft (6). A clamping groove (15) is provided on the opposite side of the middle of the clamping plate (7), and the clamping groove (15) is a polygonal groove.
6. The in-situ tensile torsion test fixture according to claim 1, characterized in that: A positioning column (16) is fixedly mounted on one group of clamping plates (7) in the same clamping part, and a positioning groove (17) capable of accommodating the sliding of the positioning column (16) is provided on another group of clamping plates (7).