Stretching clamp suitable for universal testing machine
By designing a tensile fixture composed of the left base, right base and clamping piece suitable for the universal testing machine, the slip and sliding problems of the test sample are solved, and the stable fixation of samples of different sizes is achieved and the accuracy of test data is achieved.
Patent Information
- Application Number
- CN202421733558.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-22
AI Technical Summary
When fixing samples, the existing universal testing machine fixtures have slippage and sliding phenomena, resulting in inaccurate experimental results, especially when fixing samples of different sizes.
A stretching fixture consisting of the left base, the right base, the left clamp and the right clamp are designed. The sample is fastened by adjusting the bolts of the rear clamp and the front clamp, and the excessive pressure is absorbed by using the spring to ensure that the sample is fixed in multiple directions and avoid slippage.
The stable fixation of samples of different sizes is achieved, which avoids the slippage of the samples during testing, ensures the accuracy of the test data, and protects the samples from being damaged.
Smart Images
Figure CN223154664U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tensile fixtures. Specifically, it relates to a tensile fixture applicable to a universal testing machine. Background Technique
[0002] A universal testing machine is a material testing machine integrating functions such as tension, shear, bending, and compression. It is mainly used for the mechanical property experiments of metal and non-metal materials, and has the advantages of fast measurement speed, high precision, and wide range.
[0003] The mechanical properties such as the tensile, compressive, and fatigue life of carbon fiber composite materials need to be tested using a universal testing machine. The fixation of the carbon fiber composite material by the fixture of the universal testing machine is an important factor affecting the measurement accuracy. Moreover, during the test, the materials and specifications of the specimens are also different. It is difficult for the existing universal testing machines to fix all specimens completely. During the experiment, the phenomenon of specimen slippage is very likely to occur, resulting in the failure of the experiment.
[0004] The patented technology of "Tensile Fixture for Universal Testing Machine" (CN202222839252.6). This technology includes two clamping components. Each clamping component includes a clamping seat and a pressing block. The clamping seat includes a seat body and a jaw. The jaw is detachably connected to the seat body. The jaw is provided with a groove, and the groove is adapted to the end of the specimen. The pressing block presses the end of the specimen against the bottom of the groove. The replaceable adapted jaw facilitates the positioning of non-standard or thin and small specimens. This fixture can relatively stably fix the specimen and complete the tensile experiment of the specimen. However, there are inevitably errors in the specimen size. The specimen will slide left and right in the jaw, causing errors in the test. Moreover, when testing non-standard specimens, different jaws need to be prepared according to the specimens, which will cause waste of jaws.
[0005] The patented technology of "Tensile Test Fixture for Composite Specimens Based on Universal Testing Machine" (202220955354.1). This technology includes a universal testing machine, a support table, a fixing block, a cylindrical rod, a connecting plate, a positioning device, a transmission device, and a fixture, which solves the problems that only the tensile experiments of specimens with small cross-sectional dimensions can be tested currently and the tensile fixture and die are not applicable to cube specimens. However, the fixture of this technology will cause slippage when fixing specimens with small cross-sectional dimensions, and the specimens will also slide in the fixture, resulting in deviations in the experimental results.
[0006] The patented technology of "Tensile Fixture of Universal Testing Machine" (201921468531.8). This technology includes a connecting piece, a fixed collar, a threaded rod, a tensile rod, and a fixture. This fixture has the advantages of simple structure and convenient use. It not only increases the tensile force of the fixture but also improves the overall stability and extends the service life. However, when clamping small cross-section specimens, this fixture will show a slippage phenomenon due to the small contact area, and the specimens will also slide in this fixture, resulting in deviations in the experimental results.
[0007] When the fixture of the above-mentioned technology fixes the specimen, there is a defect of mismatch. The fixture cannot fasten the specimen firmly when clamping the specimen, resulting in the phenomenon of slippage or even detachment of the specimen during the experiment, leading to the failure of the experiment. Summary of the Invention
[0008] The utility model aims to overcome the defects of the prior art, and the purpose is to provide a tensile fixture applicable to a universal testing machine. The tensile fixture is applicable to specimens to be tested with different sizes, has no slippage phenomenon during testing, and has accurate test data, and can avoid the damage of the specimens to be tested due to excessive force applied by the universal testing machine during testing.
[0009] To achieve the above purpose, the technical solution adopted by the utility model is:
[0010] The tensile fixture applicable to a universal testing machine is composed of a left base, a right base, a left clamping member and a right clamping member. The left base and the right base are the same, and the left base and the right base are symmetrically installed on the universal testing machine. The left clamping member and the right clamping member are the same. The left clamping member is installed on the left side of the left base; the right clamping member is installed on the right side of the right base.
[0011] The left base is composed of a rectangular bottom plate, a cross beam, a rear clamp adjusting bolt, a rear longitudinal beam, a rear clamp, a front clamp, a front longitudinal beam and a front clamp adjusting bolt. The front longitudinal beam and the rear longitudinal beam are respectively fixed parallel to the corresponding front side and rear side of the upper plane of the rectangular bottom plate. The outer sides of the front longitudinal beam and the rear longitudinal beam are flush with the corresponding front side and rear side of the rectangular bottom plate. The right ends of the front longitudinal beam and the rear longitudinal beam are flush with the right side surface of the rectangular bottom plate. The left ends of the front longitudinal beam and the rear longitudinal beam are fixedly connected to the cross beam, and the cross beam is fixed on the upper plane of the rectangular bottom plate. The rear clamp is arranged at the angle between the rear longitudinal beam and the cross beam. The front clamp is arranged at the angle between the front longitudinal beam and the cross beam. A rear clamp adjusting bolt is provided near the left end of the rear longitudinal beam. A front clamp adjusting bolt is provided near the left end of the front longitudinal beam. The center lines of the rear clamp adjusting bolt, the front clamp adjusting bolt, the rear clamp and the front clamp are on the same straight line; a front longitudinal beam screw hole is provided at the center position of the upper plane of the front longitudinal beam. A rear longitudinal beam screw hole is provided at the center position of the upper plane of the rear longitudinal beam. Cross beam front screw holes and cross beam rear screw holes are symmetrically provided near both ends of the cross beam. Circular through holes are symmetrically provided near the left end of the rectangular bottom plate.
[0012] The left clamping member is composed of a rear connecting plate, a rear spring, a limiting plate, a pressure rod, a front spring, a front connecting plate, and a pressing block. The upper end of the pressure rod is threadedly connected to the center position of the lower surface of the limiting plate, and the lower end of the pressure rod is threadedly connected to the center position of the upper surface of the pressing block. The upper end of the rear spring is fixedly connected to the rear end near the lower surface of the limiting plate, and the lower end of the rear spring is fixedly connected to the center position of the upper surface of the rear connecting plate; the upper end of the front spring is fixedly connected to the front end near the lower surface of the limiting plate, and the lower end of the front spring is fixedly connected to the center position of the upper surface of the front connecting plate. A left through-hole of the rear connecting plate is opened near the left end of the rear connecting plate, a right through-hole of the rear connecting plate is opened near the right end of the rear connecting plate, a left through-hole of the front connecting plate is opened near the left end of the front connecting plate, and a right through-hole of the front connecting plate is opened near the right end of the front connecting plate.
[0013] The left through-hole of the rear connecting plate of the left clamping member is threadedly connected to the rear screw hole of the cross beam of the left base through a bolt, and the right through-hole of the rear connecting plate of the left clamping member is threadedly connected to the screw hole of the rear longitudinal beam of the left base through a bolt. The left through-hole of the front connecting plate of the left clamping member is threadedly connected to the front screw hole of the cross beam of the left base through a bolt, and the right through-hole of the front connecting plate of the left clamping member is threadedly connected to the screw hole of the front longitudinal beam of the left base through a bolt.
[0014] During the test, the left end of the specimen to be tested is placed inside the left base, and the right end of the specimen to be tested is placed inside the right base; the lower surface of the pressing block of the left clamping member tightly presses on the upper surface of the left end of the specimen to be tested, and the right clamping member is symmetrically installed with the left clamping member; the left end of the specimen to be tested is located on the right side surface of the cross beam of the left base, the rear clamping block closely adheres to the rear side surface of the specimen to be tested, and the front clamping block closely adheres to the front side surface of the specimen to be tested. The right end of the specimen to be tested is symmetrically arranged with the left end of the specimen to be tested.
[0015] By adjusting the rear clamping block adjusting bolts and the front clamping block adjusting bolts on both sides of the left base, the corresponding rear clamping block and front clamping block are respectively tightly pressed on both sides of the specimen to be tested; then place the pressing block of the left clamping member on the upper surface of the specimen to be tested, fix the rear connecting plate and the front connecting plate to the left clamping member and the left base by using bolts, and then fix the circular through-holes of the rectangular bottom plates of the left base and the right base to the universal testing machine by bolts. Finally, turn on the universal testing machine and stretch the specimen to be tested by moving the left base and the right base.
[0016] The height of the front longitudinal beam and the rear longitudinal beam is the same as the height of the cross beam.
[0017] The length of the front longitudinal beam and the rear longitudinal beam is 0.6 - 0.7 times the length of the rectangular bottom plate.
[0018] The length of the cross beam is the same as the width of the rectangular bottom plate.
[0019] The width of the rear clamping block or the front clamping block of the left base is 0.1 - 0.2 times the distance between the front longitudinal beam and the rear longitudinal beam.
[0020] The height of the rear clamping block or the front clamping block of the left base is 0.8 to 0.9 times the height of the front longitudinal beam or the rear longitudinal beam.
[0021] The circular through holes symmetrically arranged near the left end of the rectangular bottom plate are fixedly connected to the universal testing machine through bolts.
[0022] The limiting plate is located directly below the chuck of the universal testing machine.
[0023] Due to the adoption of the above technical solution, the utility model has the following beneficial technical effects:
[0024] (1) When testing the specimen to be tested, the utility model can, according to the size of the specimen to be tested, adjust the rear clamping block adjusting bolts and the front clamping block adjusting bolts on both sides of the left base and the right base, respectively, so that the rear clamping block and the front clamping block are tightly pressed on both sides of the specimen to be tested, or replace the rear clamping block and the front clamping block with appropriate sizes, so that the specimen to be tested is fixed at the midline position between the left base and the right base, and is applicable to specimens to be tested with different sizes.
[0025] (2) The utility model fixes the specimen to be tested from the front and rear directions through the pressure transmitted by the rear clamping block and the front clamping block; the pressing block fixes the specimen to be tested from above through the pressure of the universal testing machine, and the two cooperate with each other, enabling the specimen to be tested to be subjected to external forces applied from the front and rear and from above and below, avoiding the displacement of the specimen to be tested during the test, and making the test data more accurate; the utility model fixes the circular through holes of the rectangular bottom plates of the left base and the right base to the universal testing machine through bolts, starts the universal testing machine, and stretches the specimen to be tested by moving the left base and the right base, and there is no slipping phenomenon during the test.
[0026] (3) During the test, the universal testing machine acts on the limiting plate, and the pressure applied by the universal testing machine is transmitted to the pressing block through the pressure rod, so that the pressing block is closely attached to the upper surface of the specimen to be tested. When the pressure applied by the universal testing machine is too large, the front springs and the rear springs on both sides of the left clamping member and the right clamping member can absorb the excess pressure and protect the specimen to be tested from being damaged; the right clamping member is symmetrically arranged with the left clamping member.
[0027] Therefore, the utility model is applicable to specimens to be tested with different sizes, has no slipping phenomenon during the test, and has accurate test data, and can avoid the specimen to be tested from being damaged due to excessive force applied by the universal testing machine during the test. Description of the Drawings
[0028] Figure 1 It is a schematic structural diagram of the utility model;
[0029] Figure 2 is Figure 1 an enlarged schematic structural diagram of the left base 1 in
[0030] Figure 3 is Figure 1Schematic enlarged view of the structure of the left clamping member 2;
[0031] Figure 4 is Figure 1 schematic diagram of the usage state. Specific implementation mode
[0032] The technical solution of the present utility model will be described completely and clearly below in conjunction with the accompanying drawings and specific implementation modes, which is not a limitation to its protection scope.
[0033] Embodiment 1
[0034] A tensile fixture applicable to a universal testing machine. As Figure 1 shown, the tensile fixture applicable to the universal testing machine is composed of a left base 1, a right base 4, a left clamping member 2 and a right clamping member 3. The left base 1 and the right base 4 are the same, the left base 1 and the right base 4 are symmetrically installed on the universal testing machine, the left clamping member 2 and the right clamping member 3 are the same, the left clamping member 2 is installed on the left side of the left base 1; the right clamping member 3 is installed on the right side of the right base 4.
[0035] As Figure 2 shown, the left base 1 is composed of a rectangular bottom plate 5, a cross beam 6, a rear clamp adjusting bolt 8, a rear longitudinal beam 9, a rear clamp 11, a front clamp 12, a front longitudinal beam 13 and a front clamp adjusting bolt 15. The front longitudinal beam 13 and the rear longitudinal beam 9 are respectively fixedly installed on the corresponding front side and rear side of the upper plane of the rectangular bottom plate 5 in parallel, the outer side surfaces of the front longitudinal beam 13 and the rear longitudinal beam 9 are flush with the corresponding front side and rear side of the rectangular bottom plate 5, the right ends of the front longitudinal beam 13 and the rear longitudinal beam 9 are flush with the right side surface of the rectangular bottom plate 5, the left ends of the front longitudinal beam 13 and the rear longitudinal beam 9 are fixedly connected to the cross beam 6, and the cross beam 6 is fixed on the upper plane of the rectangular bottom plate 5. The rear clamp 11 is arranged at the included angle between the rear longitudinal beam 9 and the cross beam 6, the front clamp 12 is arranged at the included angle between the front longitudinal beam 13 and the cross beam 6, a rear clamp adjusting bolt 8 is arranged near the left end of the rear longitudinal beam 9, a front clamp adjusting bolt 15 is arranged near the left end of the front longitudinal beam 13, and the center lines of the rear clamp adjusting bolt 8, the front clamp adjusting bolt 15, the rear clamp 11 and the front clamp 12 are on the same straight line; a front longitudinal beam screw hole 14 is arranged at the center position of the upper plane of the front longitudinal beam 13, and a rear longitudinal beam screw hole 10 is arranged at the center position of the upper plane of the rear longitudinal beam 9. Cross beam front screw holes 16 and cross beam rear screw holes 7 are symmetrically arranged near both ends of the cross beam 6, and circular through holes 17 are symmetrically arranged near the left end of the rectangular bottom plate 5.
[0036] As Figure 3As shown in the figure, the left clamping member 2 is composed of a rear connecting plate 19, a rear spring 20, a limiting plate 22, a pressing rod 23, a front spring 25, a front connecting plate 26 and a pressing block 28. The upper end of the pressing rod 23 is threadedly connected to the center position of the lower surface of the limiting plate 22, and the lower end of the pressing rod 23 is threadedly connected to the center position of the upper surface of the pressing block 28. The upper end of the rear spring 20 is fixedly connected to the rear end near the lower surface of the limiting plate 22, and the lower end of the rear spring 20 is fixedly connected to the center position of the upper surface of the rear connecting plate 19; the upper end of the front spring 25 is fixedly connected to the front end near the lower surface of the limiting plate 22, and the lower end of the front spring 25 is fixedly connected to the center position of the upper surface of the front connecting plate 26. A rear connecting plate left through hole 18 is opened near the left end of the rear connecting plate 19, a rear connecting plate right through hole 21 is opened near the right end of the rear connecting plate 19, a front connecting plate left through hole 27 is opened near the left end of the front connecting plate 26, and a front connecting plate right through hole 24 is opened near the right end of the front connecting plate 26.
[0037] As Figure 1 , Figure 2 and Figure 3 shown, the rear connecting plate left through hole 18 of the left clamping member 2 is threadedly connected to the cross beam rear screw hole 7 of the left base 1 through a bolt, and the rear connecting plate right through hole 21 of the left clamping member 2 is threadedly connected to the rear longitudinal beam screw hole 10 of the left base 1 through a bolt. The front connecting plate left through hole 27 of the left clamping member 2 is threadedly connected to the cross beam front screw hole 16 of the left base 1 through a bolt, and the front connecting plate right through hole 24 of the left clamping member 2 is threadedly connected to the front longitudinal beam screw hole 14 of the left base 1 through a bolt.
[0038] As Figure 4 shown, during the test, the left end of the specimen to be tested 29 is placed inside the left base 1, and the right end of the specimen to be tested 29 is placed inside the right base 4; the lower surface of the pressing block 28 of the left clamping member 2 tightly presses on the upper surface of the left end of the specimen to be tested 29, and the right clamping member 3 is symmetrically installed with the left clamping member 2; the left end of the specimen to be tested 29 is located on the right side surface of the cross beam 6 of the left base 1, the rear clamping block 11 closely adheres to the rear side surface of the specimen to be tested 29, and the front clamping block 12 closely adheres to the front side surface of the specimen to be tested 29.
[0039] The right end of the specimen to be tested 29 is arranged symmetrically with the left end of the specimen to be tested 29.
[0040] By adjusting the rear clamping block adjusting bolts 8 and the front clamping block adjusting bolts 15 on both sides of the left base 1, the corresponding rear clamping block 11 and front clamping block 12 are respectively tightly pressed on both sides of the specimen to be tested 29; then the pressing block 28 of the clamping member 2 is placed on the upper surface of the specimen to be tested 29, and then the rear connecting plate 19 and the front connecting plate 26 are fixed to the clamping member 2 and the left base 1 by bolts. Finally, the circular through holes 17 of the rectangular bottom plates 5 of the left base 1 and the right base 4 are fixed to the universal testing machine by bolts. The universal testing machine is started, and the specimen to be tested 29 is stretched by moving the left base 1 and the right base 4.
[0041] The height of the front longitudinal beam 13 and the rear longitudinal beam 9 is the same as that of the cross beam 6.
[0042] The length of the front longitudinal beam 13 and the rear longitudinal beam 9 is 0.6 times the length of the rectangular bottom plate 5.
[0043] The length of the cross beam 6 is the same as the width of the rectangular bottom plate 5.
[0044] The width of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.1 times the distance between the front longitudinal beam 13 and the rear longitudinal beam 9.
[0045] The height of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.8 times the height of the front longitudinal beam 13 or the rear longitudinal beam 9.
[0046] The circular through holes 17 symmetrically arranged near the left end of the rectangular bottom plate 5 are fixedly connected to the universal testing machine through bolts.
[0047] The limiting plate 22 is located directly below the chuck of the universal testing machine.
[0048] Embodiment 2
[0049] A tensile fixture applicable to a universal testing machine. Except for the following technical parameters, the rest are the same as those in Embodiment 1:
[0050] The length of the front longitudinal beam 13 and the rear longitudinal beam 9 is 0.7 times the length of the rectangular bottom plate 5;
[0051] The width of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.2 times the distance between the front longitudinal beam 13 and the rear longitudinal beam 9.
[0052] The height of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.9 times the height of the front longitudinal beam 13 or the rear longitudinal beam 9.
[0053] Embodiment 3
[0054] A tensile fixture applicable to a universal testing machine. Except for the following technical parameters, the rest are the same as those in Embodiment 1:
[0055] The length of the front longitudinal beam 13 and the rear longitudinal beam 9 is 0.65 times the length of the rectangular bottom plate 5;
[0056] The width of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.15 times the distance between the front longitudinal beam 13 and the rear longitudinal beam 9.
[0057] The height of the rear clamping block 11 or the front clamping block 12 of the left base 1 is 0.85 times the height of the front longitudinal beam 13 or the rear longitudinal beam 9.
[0058] The utility model has the following beneficial technical effects:
[0059] When the utility model tests the specimen 29 to be tested, according to the size of the specimen 29 to be tested, by adjusting the rear clamp adjusting bolts 8 and the front clamp adjusting bolts 15 on both sides of the left base 1 and the right base 4, the rear clamp 11 and the front clamp 12 are respectively pressed tightly on both sides of the specimen 29 to be tested, or the rear clamp 11 and the front clamp 12 with appropriate sizes are replaced to fix the specimen 29 to be tested at the midline position between the left base 1 and the right base 4, so as to be applicable to specimens 29 to be tested with different sizes.
[0060] 2. The utility model fixes the specimen 29 to be tested from two directions, front and back, through the pressure transmitted by the rear clamp 11 and the front clamp 12; the pressure block 28 fixes the specimen 29 to be tested from above through the pressure of the universal testing machine. The two cooperate with each other, enabling the specimen 29 to be tested to be subjected to external forces applied from the front and back and from above and below, avoiding the displacement of the specimen 29 to be tested during the test, and making the test data more accurate; the utility model fixes the circular through holes 17 of the rectangular bottom plates 5 of the left base 1 and the right base 4 to the universal testing machine through bolts, starts the universal testing machine, and stretches the specimen 29 to be tested by moving the left base 1 and the right base 4, and there is no slipping phenomenon during the test.
[0061] 3. During the test, the universal testing machine acts on the limiting plate 22, and the pressure applied by the universal testing machine is transmitted to the pressure block 28 through the pressure rod 23, so that the pressure block 28 is closely attached to the upper surface of the specimen 29 to be tested. When the pressure applied by the universal testing machine is too large, the front springs 25 and the rear springs 20 on both sides of the left clamping member 2 and the right clamping member 3 can absorb the excess pressure to protect the specimen 29 to be tested from being damaged; the right clamping member 3 is symmetrically arranged with the left clamping member 2.
[0062] Therefore, the utility model is applicable to specimens 29 to be tested with different sizes, has no slipping phenomenon during the test, and has accurate test data, and can avoid the specimen 29 to be tested from being damaged due to the excessive force applied by the universal testing machine during the test.
Claims
1. A tensile fixture applicable to a universal testing machine, characterized in that, The tensile fixture of the universal testing machine is composed of a left base (1), a right base (4), a left clamping member (2) and a right clamping member (3): The left base (1) and the right base (4) are the same. The left base (1) and the right base (4) are symmetrically installed on the universal testing machine. The left clamping member (2) and the right clamping member (3) are the same. The left clamping member (2) is installed on the left side of the left base (1); the right clamping member (3) is installed on the right side of the right base (4). The left base (1) is composed of a rectangular bottom plate (5), a cross beam (6), a rear clamp adjusting bolt (8), a rear longitudinal beam (9), a rear clamp (11), a front clamp (12), a front longitudinal beam (13) and a front clamp adjusting bolt (15); The front longitudinal beam (13) and the rear longitudinal beam (9) are respectively and parallelly fixed on the corresponding front side and rear side of the upper plane of the rectangular bottom plate (5). The outer side surfaces of the front longitudinal beam (13) and the rear longitudinal beam (9) are flush with the corresponding front side and rear side of the rectangular bottom plate (5). The right ends of the front longitudinal beam (13) and the rear longitudinal beam (9) are flush with the right side surface of the rectangular bottom plate (5). The left ends of the front longitudinal beam (13) and the rear longitudinal beam (9) are fixedly connected to the cross beam (6), and the cross beam (6) is fixed on the upper plane of the rectangular bottom plate (5); The rear clamp (11) is arranged at the angle between the rear longitudinal beam (9) and the cross beam (6). The front clamp (12) is arranged at the angle between the front longitudinal beam (13) and the cross beam (6). A rear clamp adjusting bolt (8) is provided near the left end of the rear longitudinal beam (9), and a front clamp adjusting bolt (15) is provided near the left end of the front longitudinal beam (13). The center lines of the rear clamp adjusting bolt (8), the front clamp adjusting bolt (15), the rear clamp (11) and the front clamp (12) are on the same straight line; A front longitudinal beam screw hole (14) is provided at the center position of the upper plane of the front longitudinal beam (13), and a rear longitudinal beam screw hole (10) is provided at the center position of the upper plane of the rear longitudinal beam (9); Cross beam front screw holes (16) and cross beam rear screw holes (7) are symmetrically provided near both ends of the cross beam (6), and circular through holes (17) are symmetrically provided near the left end of the rectangular bottom plate (5); The left clamping member (2) is composed of a rear connecting plate (19), a rear spring (20), a limiting plate (22), a pressure rod (23), a front spring (25), a front connecting plate (26) and a pressing block (28); the upper end of the pressure rod (23) is threadedly connected to the center position of the lower surface of the limiting plate (22), and the lower end of the pressure rod (23) is threadedly connected to the center position of the upper surface of the pressing block (28); the upper end of the rear spring (20) is fixedly connected to the rear end near the lower surface of the limiting plate (22), and the lower end of the rear spring (20) is fixedly connected to the center position of the upper surface of the rear connecting plate (19); the upper end of the front spring (25) is fixedly connected to the front end near the lower surface of the limiting plate (22), and the lower end of the front spring (25) is fixedly connected to the center position of the upper surface of the front connecting plate (26); a rear connecting plate left through hole (18) is opened at the left end near the rear connecting plate (19), a rear connecting plate right through hole (21) is opened at the right end near the rear connecting plate (19), a front connecting plate left through hole (27) is opened at the left end near the front connecting plate (26), and a front connecting plate right through hole (24) is opened at the right end near the front connecting plate (26); The rear connecting plate left through hole (18) of the left clamping member (2) is threadedly connected to the cross beam rear screw hole (7) of the left base (1) through a bolt, and the rear connecting plate right through hole (21) of the left clamping member (2) is threadedly connected to the rear longitudinal beam screw hole (10) of the left base (1) through a bolt; the front connecting plate left through hole (27) of the left clamping member (2) is threadedly connected to the cross beam front screw hole (16) of the left base (1) through a bolt, and the front connecting plate right through hole (24) of the left clamping member (2) is threadedly connected to the front longitudinal beam screw hole (14) of the left base (1) through a bolt.
2. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The heights of the front longitudinal beam (13) and the rear longitudinal beam (9) are the same as the height of the cross beam (6).
3. The tensile fixture applicable to a universal testing machine according to claim 1, wherein The lengths of the front longitudinal beam (13) and the rear longitudinal beam (9) are 0.6 to 0.7 times the length of the rectangular bottom plate (5).
4. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The length of the cross beam (6) is the same as the width of the rectangular bottom plate (5).
5. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The width of the rear clamping block (11) or the front clamping block (12) of the left base (1) is 0.1 to 0.2 times the distance between the front longitudinal beam (13) and the rear longitudinal beam (9).
6. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The height of the rear clamping block (11) or the front clamping block (12) of the left base (1) is 0.8 to 0.9 times the height of the front longitudinal beam (13) or the rear longitudinal beam (9).
7. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The circular through holes (17) symmetrically arranged near the left end of the rectangular bottom plate (5) are fixedly connected to the universal testing machine through bolts.
8. The tensile fixture applicable to a universal testing machine according to claim 1, characterized in that The limiting plate (22) is located directly below the chuck of the universal testing machine.
Citation Information
Patent Citations
Tensile fixture of universal testing machine
CN210834440U
Composite test piece tensile test fixture based on universal testing machine
CN217132787U
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CN218601025U