Spline positioning device of electronic universal material testing machine
By using gaskets and magnet positioning components in the electronic universal material testing machine, the problem of spline adhesion affecting the test results is solved, and the accurate positioning of sample strips and the accuracy of tensile tests is achieved.
Patent Information
- Application Number
- CN202421291958.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In an electronic universal material testing machine, the fixed distance and position of the spline are difficult to accurately control, resulting in the spline being adhered to the wall and affecting the accuracy of the test results.
A positioning assembly including a gasket and a magnet is adopted. The gasket abuts the bottom edge of the sample strip and is fixed by the magnet to attract and the inner wall to ensure that the sample strip and the inner wall are kept at a certain distance, avoiding adhesion, and the gasket thickness is smaller than the sample strip so as not to affect clamping.
It improves the accuracy of the tensile test of the sample strip, ensures that the sample strip does not stick to the wall during clamping, reduces test errors, and adapts to the positioning needs of sample strips of different thicknesses.
Smart Images
Figure CN223139181U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of test spline positioning, and in particular to a spline positioning device for an electronic universal material testing machine. Background Art
[0002] An electronic universal material testing machine is a new type of mechanical testing machine that uses various sensors for force and deformation detection and is controlled by a microcomputer. Due to the adoption of advanced measurement and control technologies such as sensing technology, automated detection, and microcomputer control, it can not only complete conventional tests such as tension, compression, bending, and shear, but also conduct research on the fracture properties of materials and complete a series of static mechanical property tests such as load or deformation cycles, constant loading rate, constant deformation rate, creep, and relaxation.
[0003] In the detection process of detecting the ultimate tensile stress in related technologies, it is required that the upper and lower fixing distances of the spline are consistent and in the appropriate position, and the spline cannot abut against the rear inner wall of the fixture. It is judged by the human eye whether the placed sample is in the correct position and whether it abuts against the wall, which has errors and affects the final test results. Utility Model Content
[0004] In order to reduce the situation where the spline abutting against the wall affects the test results, this application provides a spline positioning device for an electronic universal material testing machine.
[0005] The spline positioning device for an electronic universal material testing machine provided by this application adopts the following technical solution:
[0006] A spline positioning device for an electronic universal material testing machine includes a base and a mounting frame. A lower fixture is fixed on the base. An upper fixture is arranged above the lower fixture. The upper fixture is slidably mounted on the mounting frame. An upper clamping groove for clamping one end of the sample strip is arranged on the upper fixture. A lower clamping groove for clamping the other end of the sample strip is arranged on the lower fixture. One side of both the upper clamping groove and the lower clamping groove communicates with the outside, and the other side has an inner wall. A positioning component is installed in the lower clamping groove. The positioning component includes a gasket. A raised piece is fixed on the upper surface of the side of the gasket close to the inner wall. The bottom edge of the sample strip abuts against the gasket. The side of the gasket close to the inner wall abuts against the raised piece. The thickness of the sample strip in the horizontal direction is greater than the thickness of the gasket in the horizontal direction.
[0007] By adopting the above technical solution, when a tensile test is performed on the sample strip, the upper end of the sample strip is placed in the upper clamping groove and clamped, and the lower end is placed in the lower clamping groove and clamped. The upper fixture slides upward to stretch the sample strip; when installing the sample strip, first place the gasket vertically in the lower clamping groove, with the convex piece abutting against the inner wall. The gasket positions the lower side of the sample strip, and the side of the convex piece away from the inner wall abuts against the sample strip, keeping a certain interval between the sample strip and the inner wall, thus ensuring the accuracy during its stretching. And since the thickness of the gasket is thinner than that of the sample strip, it will not affect the clamping of the sample strip by the lower fixture.
[0008] Optionally, a first magnet is fixedly installed on the side wall of the gasket close to the inner wall. The inner wall is made of ferromagnetic metal, and the first magnet is attracted and fixed to the inner wall.
[0009] By adopting the above technical solution, in order to ensure that the position of the gasket in the lower clamping groove remains fixed and is not prone to displacement, the position of the gasket is positioned by the attraction and fixation between the first magnet and the inner wall.
[0010] Optionally, a second magnet is fixedly installed on the side wall of the gasket away from the sample strip. The groove wall of the lower clamping groove close to the second magnet is made of ferromagnetic metal, and the second magnet is attracted and fixed to the groove wall of the lower clamping groove.
[0011] By adopting the above technical solution, the second magnet is attracted and fixed to the lower clamping groove, and the first magnet is attracted and fixed to the inner wall, so that the gasket can be in a vertical state when placed in the lower clamping groove, and thus the sample strip placed on the upper side of the gasket is also in a vertical state, ensuring the accuracy during its stretching.
[0012] Optionally, the number of the gaskets is multiple, and the multiple gaskets are arranged along the width direction of the lower clamping groove. The thickness of the multiple gaskets in the horizontal direction is always less than the thickness of the sample strip.
[0013] By adopting the above technical solution, due to the different thicknesses of the sample strips, when the thickness of the sample strip is relatively thick, installing multiple gaskets can better meet the positioning of the sample strip.
[0014] Optionally, a third magnet is fixed on each side of the multiple gaskets close to each other, and the multiple gaskets are attracted and fixed by the third magnets.
[0015] By adopting the above technical solution, the multiple gaskets are fixed by magnets, ensuring the stability of the gaskets when installed in the lower clamping groove and ensuring its positioning effect.
[0016] In summary, the present application includes at least one of the following beneficial technical effects:
[0017] 1. When a tensile test is performed on a sample strip, the upper end of the sample strip is placed in the upper clamping groove and clamped, and the lower end is placed in the lower clamping groove and clamped. The upper fixture slides upward to stretch the sample strip. When installing the sample strip, first place the gasket vertically in the lower clamping groove, with the raised piece abutting against the inner wall. The gasket positions the lower side of the sample strip, and the side of the raised piece away from the inner wall abuts against the sample strip, keeping a certain interval between the sample strip and the inner wall, thus ensuring the accuracy during its stretching. And since the thickness of the gasket is thinner than that of the sample strip, it will not affect the clamping of the sample strip by the lower fixture.
[0018] 2. The second magnet is attracted and fixed to the lower clamping groove, and the first magnet is attracted and fixed to the inner wall, enabling the gasket to be in a vertical state when placed in the lower clamping groove, so that the sample strip placed on the upper side of the gasket is also in a vertical state, ensuring the accuracy during its stretching.
[0019] 3. Due to the different sizes and thicknesses of the sample strips, when the sample strip is relatively thick, installing multiple gaskets can better meet the positioning requirements of the sample strip. Description of the Drawings
[0020] Figure 1 is an exploded schematic view of the sample strip, the upper fixture, and the lower fixture.
[0021] Figure 2 is a structural schematic view of the sample strip, the upper fixture, and the lower fixture.
[0022] Figure 3 is a partial enlarged view of the positioning component at Figure 2 at position A in
[0023] Figure 4 is a structural schematic view of the positioning component.
[0024] Description of the Reference Numerals: 1, base; 2, mounting frame; 21, moving plate; 3, lower fixture; 31, lower clamping plate; 32, lower clamping groove; 33, inner wall; 4, upper fixture; 41, upper clamping plate; 42, upper clamping groove; 5, sample strip; 6, positioning component; 61, gasket; 62, raised piece; 63, first slot; 64, first magnet; 65, second slot; 66, second magnet; 67, third slot; 68, third magnet. Detailed Embodiment
[0025] The following further describes the present application in detail with reference to Figures 1-4 the accompanying drawings.
[0026] The embodiment of the present application discloses a sample strip positioning device for an electronic universal material testing machine.
[0027] Refer to Figure 1, An electronic universal material testing machine spline positioning device includes a horizontally arranged base 1 and a mounting frame 2 vertically fixed on the base 1. A lower clamp 3 is fixed at the center of the base 1. A moving plate 21 is slidably mounted on the mounting frame 2. The moving plate 21 can slide up and down along the length direction of the mounting frame 2. A middle section of the moving plate 21 is fixed with an upper clamp 4, and the upper clamp 4 is located directly above the lower clamp 3. A sample strip 5 is installed between the lower clamp 3 and the upper clamp 4, and a positioning component 6 is installed on the lower clamp 3. The positioning component 6 positions the position of the sample strip 5 to ensure the accuracy during its stretching.
[0028] Two upper clamping plates 41 are installed on the upper clamp 4. There is a certain interval between the two upper clamping plates 41. An upper clamping groove 42 for the upper end of the sample strip 5 to be placed is provided between the two upper clamping plates 41. The two upper clamping plates 41 can move towards each other to clamp the sample strip 5 placed in the upper clamping groove 42.
[0029] Two lower clamping plates 31 are installed on the lower clamp 3. There is a certain interval between the two lower clamping plates 31. A lower clamping groove 32 for the lower end of the sample strip 5 to be placed is provided between the two lower clamps 3. When the two lower clamping plates 31 move towards each other, the lower end of the sample strip 5 is clamped by the lower clamp 3. After the two ends of the sample strip 5 are clamped by the upper clamp 4 and the lower clamp 3, the upper clamp 4 moves upward to perform a tensile property test on the sample strip 5.
[0030] One side of both the upper clamping groove 42 and the lower clamping groove 32 communicates with the outside, enabling the sample strip 5 to be inserted horizontally into the upper clamping groove 42 and the lower clamping groove 32 in a vertical state. The sides of the upper clamping groove 42 and the lower clamping groove 32 close to the clamp are both provided with inner walls 33, and the positioning component 6 is located in the lower clamping groove 32.
[0031] Refer to Figure 2 and Figure 3 , The positioning component 6 includes gaskets 61. The gaskets 61 are vertically arranged in the lower clamping groove 32. The number of gaskets 61 is multiple, and the gaskets 61 are arranged in sequence along the width direction of the lower clamping groove 32. The number in this embodiment is two. The number of gaskets 61 can be adjusted according to the width of the actually clamped sample strip 5, but the thickness of the gaskets 61 in the horizontal direction is always less than the thickness of the sample strip 5. When the two lower clamping plates 31 approach each other for clamping, the lower clamping plates 31 only clamp the sample strip 5.
[0032] A raised piece 62 is fixed on the upper surface of each gasket 61. The thickness of the raised piece 62 is the same as that of the gasket 61, and the raised piece 62 is located on the side of the gasket 61 close to the inner wall 33, and the raised piece 62 can abut against the inner wall 33. When positioning the sample strip 5 is required, first place the gasket 61 into the lower clamping groove 32, and at the same time the raised piece 62 abuts against the inner wall 33, then place the sample strip 5 on the upper side of the gasket 61, and at the same time the sample strip 5 abuts against the side of the raised piece 62 away from the inner wall 33, so that a fixed interval is maintained between the sample strip 5 and the inner wall 33, reducing the situation where the test result is inaccurate due to the sample strip 5 adhering to the wall.
[0033] Referring to Figure 4 , a first slotted groove 63 is formed on the side of each gasket 61 close to the inner wall 33. The first slotted groove 63 is formed along the length direction of the gasket 61, and a first magnet 64 is fixed in the first slotted groove 63. The material of the inner wall 33 is iron metal, and the first magnet 64 and the inner wall 33 attract each other, so that the gasket 61 can be attracted and fixed on the inner wall 33 when placed in the lower clamping groove 32.
[0034] A second slotted groove 65 is formed on the lower surface of each gasket 61, and a second magnet 66 is fixed in the second slotted groove 65. The groove wall of the lower clamping groove 32 is made of iron metal, and the lower surface of the gasket 61 is attracted and fixed to the inner wall 33 of the lower clamping groove 32 through the second magnet 66, so as to ensure that the gasket 61 remains vertical when placed in the lower clamping groove 32, thereby improving the positioning accuracy of the sample strip 5.
[0035] A third slotted groove 67 is formed on the side of each gasket 61, and a third magnet 68 is fixed in the third slotted groove 67. The adjacent gaskets 61 are attracted and fixed to each other through the third magnet 68, so that the gasket 61 can stably position the sample strip 5 with different thicknesses.
[0036] The implementation principle of the sample strip positioning device of the electronic universal material testing machine in the embodiment of the present application is as follows:
[0037] When the sample strip 5 needs to be subjected to a tensile test, first place the gasket 61 vertically into the lower clamping groove 32 so that one side of the raised piece 62 abuts against the inner wall 33, then place the sample strip 5 on the upper side of the gasket 61. The first magnet 64 and the second magnet 66 enable the gasket 61 to be stably placed vertically in the lower clamping groove 32. The sample strip 5 abuts against the side of the raised piece 62 away from the inner wall 33, so that a certain interval is maintained between the sample strip 5 and the inner wall 33. After the upper fixture 4 and the lower fixture 3 clamp the sample strip 5, since the thickness of the gasket 61 is smaller than that of the sample strip 5, the gasket 61 will not be clamped. The upper fixture 4 slides upward to perform a tensile test on the sample strip 5, ensuring the accuracy of the test.
[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An electronic universal material testing machine sample positioning device, comprising a base (1) and a mounting frame (2). A lower clamp (3) is fixed on the base (1). An upper clamp (4) is arranged above the lower clamp (3). The upper clamp (4) is slidably mounted on the mounting frame (2). An upper clamping groove (42) for clamping one end of a sample strip (5) is provided on the upper clamp (4). A lower clamping groove (32) for clamping the other end of the sample strip (5) is provided on the lower clamp (3). It is characterized in that: One side of the upper clamping groove (42) and the lower clamping groove (32) communicates with the outside, and the other side is provided with an inner wall (33). A positioning component (6) is installed in the lower clamping groove (32). The positioning component (6) includes a gasket (61). A raised piece (62) is fixed on the upper surface of the side of the gasket (61) close to the inner wall (33). The bottom edge of the sample strip (5) abuts against the gasket (61). The side of the gasket (61) close to the inner wall (33) abuts against the raised piece (62). The thickness of the sample strip (5) in the horizontal direction is greater than the thickness of the gasket (61) in the horizontal direction.
2. The spline positioning device of an electronic universal material testing machine according to claim 1, wherein: A first magnet (64) is fixedly installed on the side wall of the gasket (61) close to the inner wall (33). The inner wall (33) is made of iron metal, and the first magnet (64) is attracted and fixed to the inner wall (33).
3. The spline positioning device of an electronic universal material testing machine according to claim 1, characterized in that: A second magnet (66) is fixedly installed on the side wall of the gasket (61) away from the sample strip (5). The groove wall of the lower clamping groove (32) close to the second magnet (66) is made of iron metal, and the second magnet (66) is attracted and fixed to the groove wall of the lower clamping groove (32).
4. The spline positioning device of an electronic universal material testing machine according to claim 1, characterized in that: The number of the gaskets (61) is multiple. The multiple gaskets (61) are arranged along the width direction of the lower clamping groove (32). The thickness of the multiple gaskets (61) in the horizontal direction is always less than the thickness of the sample strip (5).
5. An electronic universal material testing machine spline positioning device according to claim 4, characterized in that: Third magnets (68) are fixed on the sides of the multiple gaskets (61) close to each other. The multiple gaskets (61) are attracted and fixed to each other through the third magnets (68).