A sample loading fixture for stress testing

Abstract

This invention discloses a sample loading fixture for stress testing, relating to the field of stress testing technology. The invention includes a base plate with several support components mounted on its bottom surface. A slide rail mechanism is fixed to the top of the base plate, and a support assembly and a testing assembly are connected to the top of the slide rail mechanism. The support assembly and the testing assembly are interconnected. A positioning seat is mounted at one end of the top surface of the base plate. A positioning component is provided on one side of the support assembly, and a pressure plate mechanism is provided on the other side. An adjustment mechanism is provided between the testing assembly and the base plate. A position counting component is provided on one side of the slide rail mechanism. This invention, through a stepped planning of the distance the support assembly is pulled, and by comparing the tensile force display of the force gauge and the tensile stress reading of the stress sensor, forms multiple regular test control groups. Coupled with a high-precision testing environment, this enables comprehensive measurement of tensile stress data and completes a comprehensive and accurate recording of the tensile strength of the substrate glass.

Description

Technical Field

[0001] This invention relates to the field of stress testing technology, and more specifically to a sample loading fixture for stress testing. Background Technology

[0002] Stress refers to the force acting on a unit area. It is usually used to describe the force distribution inside an object or material after it is subjected to force. The unit of stress is Pascal, which is the force per square meter. Types of stress include tensile stress, compressive stress, shear stress, and bending stress. In the quality inspection process of substrate glass, stress analysis is one of the more important test items. It is used to evaluate the performance and stability of substrate glass under stress conditions. Specific loading fixtures are required when performing stress testing on substrate glass.

[0003] The patent specification with publication number CN211347909U discloses a glass stress testing device, which includes a worktable, a light shield, and a testing device. The testing device is located in the middle of the worktable. The testing device includes a light box, polarizer I, polarizer II, and a camera. The light box is located at the bottom of the worktable surface. The light box contains a light source, and the top of the light box is a projection area. A horizontal polarizer I is laid at the position corresponding to the projection area of ​​the light box. The worktable has a notch for allowing light to pass through at the position corresponding to the projection area of ​​the light box. Supports are provided on both sides of the top of the worktable surface corresponding to the position of the notch. Two guide rails with axes parallel to the width direction of the worktable are spaced apart between the two supports. The two guide rails have a movable box that can move back and forth along the axis of the guide rail.

[0004] The shortcomings of this technical solution are as follows: the device drives the glass through guide rollers and uses a servo motor to drive a camera to take comprehensive pictures of the glass under the polarizer and process the pictures in grayscale to detect the stress distribution of the glass. However, the substrate glass needs to be tested for stress in various dimensions. This device can only detect the stress distribution under natural placement. The actual stress detection can be achieved by stress sensor. The more critical part of the measurement process is to detect the stress change of the glass under various pulling and compressing conditions to determine the overall performance of the glass. This device cannot determine the tensile stress resistance of the substrate glass when it is pulled. Summary of the Invention

[0005] The purpose of this invention is to provide a sample loading fixture for stress testing. The technical problem to be solved is as follows: Existing glass stress testing devices cannot determine the tensile stress resistance of glass under tension.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A sample loading fixture for stress testing includes a base plate with several support components mounted on its bottom surface. A slide rail mechanism is fixedly connected to the top of the base plate, and a support assembly and a test assembly are connected to the top of the slide rail mechanism. The support assembly and the test assembly are interconnected. At least one positioning seat is mounted on one end of the top surface of the base plate. A positioning component is provided on one side of the support assembly, and a pressure plate mechanism is provided on the other side. The positioning component and the pressure plate mechanism are used to adapt and fix glass substrates of different specifications. An adjustment mechanism is provided between the test assembly and the base plate, and a position counting component is provided on one side of the slide rail mechanism. The adjustment mechanism and the position counting component are used to cooperate with the test assembly to perform control group tests on the measurement process.

[0008] As a further aspect of the present invention: the support assembly includes a support plate, an adjustment column is installed on the top of the support plate, and a support block is installed at the top of the adjustment column and is fixedly connected to the bottom surface of the base plate.

[0009] As a further embodiment of the present invention: the slide rail mechanism includes two slide rails fixedly connected to both sides of the top of the base plate, the two slide rails are parallel to each other, and two sliders are slidably connected to both sides of the top of the two slide rails, wherein a support plate is fixedly connected between two adjacent sliders, the top of the support plate is connected to the support assembly, and a test support plate is fixedly connected between two other adjacent sliders, the top of the test support plate is connected to the test assembly.

[0010] As a further embodiment of the present invention: the support assembly includes a main support block fixedly connected to the top of the support plate, a secondary support block fixedly connected to one side of the top of the main support block, a material receiving groove provided at the top of both the main support block and the secondary support block, and a connecting block fixedly connected to the side of the main support block away from the positioning seat; the testing assembly includes a test plate fixedly connected to the top of the test support plate, a force gauge installed at the top of the test plate, a floating joint connected to one end of the force gauge, and the floating joint fixedly connected to the adjacent connecting block.

[0011] As a further aspect of the present invention: the adjustment mechanism includes two rotating handles fixedly connected to one side of the top of the base plate, a lead screw rotatably connected between the two rotating handles, one end of the lead screw extending to the outside of the base plate and fixedly connected to an adjustment handle, a fixing block threadedly connected to the middle of the lead screw, and the fixing block being fixedly connected to the adjacent side of the top of the test plate.

[0012] As a further embodiment of the present invention: an indicator plate is fixedly connected to one side of the support plate, and a scale is provided at the top of the base plate below the indicator plate, the length of the scale being not less than the length of the slide rail.

[0013] As a further aspect of the present invention: the positioning component includes a limiting block fixedly connected between the main support block and the secondary support block, the limiting block is rotatably connected to a limiting handle, and a stop plate is rotatably connected to the inner side of the limiting handle. The top of the stop plate is higher than the material receiving groove but not higher than the top surface of the glass substrate to be tested.

[0014] As a further embodiment of the present invention: both of the positioning seats have a feed port at their top, and the bottom surface of the two feed ports is flush with the bottom surface of the material receiving groove. The two sides of the feed port correspond to and overlap with the two sides of the material receiving groove. The top of each positioning seat is rotatably connected with a crimping handle.

[0015] As a further embodiment of the present invention: the pressure plate mechanism includes a receiving plate fixedly connected to the outside of the main support block, a pressure plate frame fixedly connected to the top of the receiving plate, a main pressure base fixedly connected to the top of the pressure plate frame, a limiting sleeve provided at the bottom of the main pressure base, a pressure rod slidably connected to the limiting sleeve, a main pressure plate fixedly connected to the bottom surface of the pressure rod, limiting posts slidably connected to both sides of the main pressure plate and the pressure plate frame, a crank block rotatably connected to the top of the pressure rod, a pressure handle rotatably connected to the top of the crank block, the pressure handle rotatably connected to the main pressure base, a positioning bolt installed between the main pressure plate and the bottom of the pressure plate frame, and a locking nut installed on the top of the positioning bolt.

[0016] As a further aspect of the present invention: the bottom surface of the main pressure plate is provided with a convex pressure block, the width of which is less than the width of the material receiving groove, and the length of the convex pressure block is greater than the distance between the adjacent top surfaces of the main support block and the secondary support block.

[0017] The beneficial effects of this invention are:

[0018] 1. In this invention, a slide rail mechanism is installed at the top of the base plate, and the support assembly and the test assembly are slidably connected by the slide rail mechanism. Two positioning seats are installed at one end of the base plate, and the glass substrate to be tested is installed between the positioning seats and the support assembly. During the installation process, the compatibility and fixation of glass substrates of different thicknesses and widths are achieved through the cooperation of the pressing handle, the positioning assembly and the pressing plate mechanism, thereby improving its testing and compatibility range.

[0019] 2. In this invention, when fixing the substrate glass, the side of the glass is fixed by first rotating the limiting handle on the positioning component, then the end of the glass is fixed by rotating the pressing handle on the positioning seat, and finally the substrate is fully fixed by the pressing handle on the pressing plate mechanism in conjunction with the locking nut. Since the sides and bottom of the material tray and the material outlet of the glass are overlapped, and the pressing handle is pressed vertically downwards, and with the horizontal adjustment of the support component in the initial stage of use, the fixed substrate glass is not affected by oblique force when it is pulled, thereby improving the test accuracy when tensile stress is detected.

[0020] 3. In this invention, a force gauge is installed on the test assembly, and the force gauge is connected to the support assembly on which the glass to be tested is installed via a floating joint. The test plate that fixes the force gauge is fixed to the adjustment mechanism on one side. At the same time, an indicator plate that can indicate the scale is set on one side of the support assembly. In conjunction with the stress sensor installed on the glass to be tested, the operator can plan the distance of pulling the support assembly in a stepwise manner when rotating the adjustment handle of the adjustment mechanism. By comparing the tensile force display of the force gauge and the tensile stress reading of the stress sensor, multiple regular test control groups are formed. With the aid of a high-precision test environment, a comprehensive measurement of tensile stress data can be achieved, and a comprehensive and accurate record of the tensile strength of the substrate glass can be completed. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a side view of the present invention;

[0024] Figure 3 This is the present invention. Figure 2 A partial structural diagram;

[0025] Figure 4 This is the present invention. Figure 1 Enlarged detail view of point A in the middle;

[0026] Figure 5 This is the present invention. Figure 1 Enlarged detail view of point B in the middle;

[0027] Figure 6 This is the present invention. Figure 1 Detailed magnified view of point C in the middle;

[0028] Figure 7 This is the present invention. Figure 1 A magnified view of the details at point D.

[0029] In the diagram: 1. Base plate; 2. Support assembly; 21. Support plate; 22. Adjusting column; 23. Support block; 3. Slide rail mechanism; 31. Slide rail; 32. Slider; 33. Support plate; 34. Test support plate; 4. Support assembly; 41. Main support block; 42. Secondary support block; 43. Material receiving groove; 44. Connecting block; 5. Test assembly; 51. Test stationary plate; 52. Force gauge; 53. Floating joint; 6. Positioning seat; 61. Material passage; 62. Crimping handle; 7. Positioning assembly; 71. 72. Limiting block; 73. Limiting handle; 8. Support plate; 84. Pressure plate mechanism; 85. Receiving plate; 86. Pressure plate frame; 87. Main pressure base; 88. Limiting sleeve; 89. Pressure rod; 80. Main pressure plate; 81. Limiting post; 82. Crank block; 83. Pressure handle; 84. Positioning bolt; 85. Locking nut; 96. Adjusting mechanism; 97. Rotary handle seat; 98. Lead screw; 99. Adjusting handle; 90. Fixing block; 11. Positioning assembly; 12. Indicator plate; 13. Scale; 14. Handle. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 7 As shown, a sample loading fixture for stress testing includes a base plate 1. Four support components 2 are installed at the four corners of the bottom surface of the base plate 1. A slide rail mechanism 3 is fixedly connected to the top of the base plate 1. A support component 4 and a test component 5 are connected to the top of the slide rail mechanism 3. The support component 4 and the test component 5 are interconnected. Two positioning seats 6 are installed at one end of the slide rail mechanism 3 on the top surface of the base plate 1. A positioning component 7 is provided on one side of the support component 4, and a pressure plate mechanism 8 is provided on the opposite side. The positioning component 7 and the pressure plate mechanism 8 are used to adapt and fix glass substrates of different specifications. An adjustment mechanism 9 is provided between the test component 5 and the base plate 1. A position counting component 10 is provided on one side of the slide rail mechanism 3 on the top surface of the base plate 1. The adjustment mechanism 9 and the position counting component 10 are used to cooperate with the test component 5 to perform control group tests on the measurement process.

[0032] It should be noted that three through holes are provided in the middle of the base plate 1 to reduce the weight of use; the support assembly 2 includes a support plate 21, an adjusting column 22 is installed on the top of the support plate 21, and a support block 23 is fixedly connected to the bottom surface of the base plate 1 at the top of the adjusting column 22. The adjusting column 22 is made of screw, and the connection between the two sides of the adjusting column 22 and the support plate 21 and the support block 23 is locked with nuts. Since it is necessary to eliminate the interference of external forces during the stress detection process, the surface of the base plate 1 can be adjusted to a horizontal state by adjusting the distance between the adjusting column 22 and the support plate 21, thereby improving the detection accuracy; at the same time, handles 11 are installed on both sides of the top surface of the base plate 1 that are far apart from each other for convenient transfer of the whole device;

[0033] like Figures 1 to 3 As shown, the slide rail mechanism 3 includes two slide rails 31 fixedly connected to both sides of the top of the base plate 1. The two slide rails 31 are parallel to each other, and two sliders 32 are slidably connected to both sides of the top of the two slide rails 31. A support plate 33 is fixedly connected between two adjacent sliders 32. The top of the support plate 33 is used to install the support assembly 4. A test support plate 34 is fixedly connected between two other adjacent sliders 32. The test support plate 34 is used to install the test assembly 5. That is, the slide rail mechanism 3 allows the support assembly 4 and the test assembly 5 to remain in a sliding state.

[0034] The support assembly 4 includes a support main block 41 fixedly connected to the top of the support plate 33. The side cross section of the support main block 41 is L-shaped. A support sub-block 42 is fixedly connected to one side of the top of the support main block 41. Both the support main block 41 and the support sub-block 42 are provided with material receiving grooves 43 at their tops. A connecting block 44 is fixedly connected to the side of the support main block 41 away from the positioning seat 6. The connecting block 44 is used to connect with the test assembly 5.

[0035] The test assembly 5 includes a test plate 51 fixedly connected to the top of the test support plate 34. The test plate 51 is used to fix the force gauge 52 at the top. One end of the force gauge 52 is connected to a floating joint 53, which is fixedly connected to an adjacent connecting block 44. When the adjustment mechanism 9 moves the test assembly 5, the floating joint 53 with a spring inside the force gauge 52 pulls the support assembly 4 through the connecting block 44, thereby pulling the glass to be tested in the material receiving groove 43 on the support assembly 4. When the floating joint 53 pulls the spring inside the force gauge 52, the tester can record the reading through the display screen of the force gauge 52.

[0036] The adjustment mechanism 9 includes two rotating handle seats 91 fixedly connected to one side of the top of the base plate 1. A lead screw 92 is rotatably connected between the two rotating handle seats 91. One end of the lead screw 92 extends to the outside of the base plate 1 and is fixedly connected to the adjustment handle 93. A fixing block 94 is threadedly connected to the middle of the lead screw 92. The fixing block 94 is fixedly connected to the adjacent side of the top of the test plate 51. That is, the tester rotates the adjustment handle 93 to move the fixing block 94, and the test component 5 connected to the fixing block 94 moves accordingly. With the aforementioned reading record, the tension during the movement of the support component 4 is recorded in real time.

[0037] like Figure 1 and Figure 7 As shown, since the tensile stress measurement process requires the setting of a control group to obtain comprehensive measurement information of stepped tensile force data, and when setting the control group, a stepped pulling distance can be used to calculate the tensile force, it is necessary to quantify and record the displacement of the support assembly 4 supporting the glass substrate to be tested. The position counting assembly 10 is used to specifically implement this function. Specifically, an indicator plate 101 is fixedly connected to one side of the support plate 33 fixedly connected to the bottom surface of the support main block 41. The indicator plate 101 is a thin metal block with an arrow-shaped bottom. A scale 102 is set at the top of the base plate 1 below the indicator plate 101. Preferably, the scale 102 is parallel to the slide rail 31 and has the same length.

[0038] It should be noted that when setting up a reference group for tensile stress measurement of the substrate glass, the operator moves the fixing block 94 by rotating the adjustment handle 93. The fixing block 94 then moves the test plate 51 of the test assembly 5. The force gauge 52 fixed on the test plate 51 pulls the support assembly 4 through the floating joint 53. During the movement, the support assembly 4 moves the indicator 101. Since the indicator 101 is directly above the scale 102, quantitative information of the displacement data can be obtained. In addition, the slide rail mechanism 3 supports the movement of the support assembly 4 and the test assembly 5. That is, the operator can quantify and record the value of the force gauge 52 and the displacement change of the scale 102 by rotating the adjustment handle 93, thereby setting up a test control group for the tensile force under the stepped pulling distance, so as to assist in the comprehensive tensile stress measurement function.

[0039] like Figure 1 , Figures 4 to 6 As shown, the positioning component 7 includes a limiting block 71 fixedly connected between the main support block 41 and the secondary support block 42. The limiting block 71 is rotatably connected to the limiting handle 72. The inner side of the limiting handle 72 is rotatably connected to the abutment plate 73. Preferably, the top of the abutment plate 73 is higher than the material receiving groove 43 and not higher than the top surface of the thinnest substrate glass to be tested. That is, by rotating the limiting handle 72, the abutment plate 73 can be driven to limit the side of the substrate glass of various specifications to be tested.

[0040] Two positioning seats 6 are fixedly connected to the extension line of the slide rail 31. The top of each positioning seat 6 is provided with a material passage 61, and the bottom surface of the two material passages 61 is flush with the bottom surface of the material receiving groove 43. The side of the material passage 61 is located on the same vertical plane as the same side of the material receiving groove 43. At the same time, the material passage 61 of the outer positioning seat 6 is closed, while the material passage 61 of the inner positioning seat 6 is through. The top of each positioning seat 6 is rotatably connected to a crimping handle 62.

[0041] The pressure plate mechanism 8 includes a receiving plate 81 fixedly connected to the outside of the main support block 41. The side cross-section of the receiving plate 81 is L-shaped. A pressure plate frame 82 is fixedly connected to the top of the receiving plate 81. The pressure plate frame 82 is U-shaped in the horizontal direction. A main pressure base 83 is fixedly connected to the middle of the top of the inner side of the pressure plate frame 82. A limiting sleeve 84 is provided at the bottom of the main pressure base 83. A pressure rod 85 is slidably connected inside the limiting sleeve 84. A main pressure plate 86 is fixedly connected to the bottom surface of the pressure rod 85. The main pressure plate 86 is connected to the pressure plate frame 81 on both sides. A limiting post 87 is slidably connected between the two, and the limiting post 87 is used to stably limit the vertical movement of the main pressure plate 86; the top of the pressure rod 85 is rotatably connected to the crank block 88, the top of the crank block 88 is rotatably connected to the pressure handle 89, and the pressure handle 89 is rotatably connected to the main pressure base 83; in addition, a positioning bolt 810 is installed between the main pressure plate 86 and the bottom of the pressure plate frame 82, and the top of the positioning bolt 810 is locked by a locking nut 811. Preferably, the locking nut 811 is a wing nut, which is convenient for rotation locking;

[0042] It should be noted that during testing, one end of the glass substrate to be tested is placed at the two feed ports 61, and pressed against the inner end of the outer feed port 61. Then, the limiting handle 72 is rotated to push the glass substrate to be tested into the feed port 61 and the side of the receiving groove 43 near the pressure plate mechanism 8, so as to achieve the adaptation and fixation of glass substrates of different widths. After that, the two pressing handles 62 are rotated to fix one end of the glass. Finally, the locking nut 811 on the positioning bolt 89 is unscrewed, and then the pressing handle 810 is pressed down. Since both ends of the crank block 88 are rotatably connected, and the bottom pressing handle is... The rod 85 is vertically limited within the limiting sleeve 84, so the main pressure plate 86 can be vertically fixed to the main body of the glass. After fixing, the locking nut 811 is tightened again, thus achieving the adaptation and fixing of glass substrates of different thicknesses; thereby achieving the adaptation and stable fixing of glass substrates of different specifications; in addition, a convex pressure block is provided on the bottom surface of the main pressure plate 86, and its width is smaller than the width of the material receiving groove 43, and its length is greater than the distance between the adjacent surfaces of the top of the main support block 41 and the secondary support block 42. This structure ensures that there is enough support surface to stably press down on the glass substrate;

[0043] Furthermore, during stress measurement of the substrate glass, a corresponding stress sensor is fixedly installed along with the glass under test. The stress sensor is used to transmit the stress values ​​corresponding to different tensile forces of the tensile control group in real time, thereby realizing the measurement of the change of tensile stress of the glass under different tensile forces. By recording the corresponding data of the stress sensor, scale 102 and force gauge 52 at different pulling distances, the tester can obtain a line graph of the change of tensile stress of the substrate glass under different tensile forces, thereby realizing a comprehensive measurement of tensile stress data and completing a comprehensive record of the tensile resistance of the substrate glass.

[0044] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A sample loading fixture for stress testing, comprising a base plate (1), wherein a plurality of support components (2) are mounted on the bottom surface of the base plate (1), characterized in that, The top of the base plate (1) is fixedly connected to a slide rail mechanism (3), and the top of the slide rail mechanism (3) is connected to a support assembly (4) and a test assembly (5). The support assembly (4) and the test assembly (5) are connected to each other. At least one positioning seat (6) is installed on one end of the top surface of the base plate (1). A positioning assembly (7) is provided on one side of the support assembly (4), and a pressure plate mechanism (8) is provided on the other side. The positioning assembly (7) and the pressure plate mechanism (8) are used to adapt and fix glass substrates of different specifications. An adjustment mechanism (9) is provided between the test assembly (5) and the base plate (1). A position counting assembly (10) is provided on one side of the slide rail mechanism (3). The adjustment mechanism (9) and the position counting assembly (10) are used to cooperate with the test assembly (5) to conduct a control group test on the measurement process. The slide rail mechanism (3) includes two slide rails (31) fixedly connected to the top sides of the base plate (1). The two slide rails (31) are parallel to each other, and two sliders (32) are slidably connected to the top sides of the two slide rails (31). A support plate (33) is fixedly connected between two adjacent sliders (32). The top of the support plate (33) is connected to the support assembly (4). A test support plate (34) is fixedly connected between two adjacent sliders (32). The top of the test support plate (34) is connected to the test assembly (5). The support assembly (4) includes a main support block (41) fixedly connected to the top of the support plate (33), a secondary support block (42) fixedly connected to one side of the top of the main support block (41), a material receiving groove (43) provided at the top of both the main support block (41) and the secondary support block (42), and a connecting block (44) fixedly connected to the side of the main support block (41) away from the positioning seat (6). The test assembly (5) includes a test plate (51) fixedly connected to the top of the test support plate (34), a force gauge (52) installed at the top of the test plate (51), a floating joint (53) connected to one end of the force gauge (52), and the floating joint (53) fixedly connected to the adjacent connecting block (44). The adjustment mechanism (9) includes two rotating handles (91) fixedly connected to one side of the top of the base plate (1). A lead screw (92) is rotatably connected between the two rotating handles (91). One end of the lead screw (92) extends to the outside of the base plate (1) and is fixedly connected to an adjustment handle (93). A fixing block (94) is threadedly connected to the middle of the lead screw (92). The fixing block (94) is fixedly connected to the adjacent side of the top of the test plate (51).

2. The sample loading fixture for stress testing according to claim 1, characterized in that, The support assembly (2) includes a support plate (21), an adjustment column (22) is installed on the top of the support plate (21), and a support block (23) is installed on the top of the adjustment column (22) and is fixedly connected to the bottom surface of the base plate (1).

3. The sample loading fixture for stress testing according to claim 1, characterized in that, An indicator plate (101) is fixedly connected to one side of the support plate (33), and a scale (102) is provided at the top of the base plate (1) below the indicator plate (101). The length of the scale (102) is not less than the length of the slide rail (31).

4. The sample loading fixture for stress testing according to claim 1, characterized in that, The positioning component (7) includes a limiting block (71) fixedly connected between the main support block (41) and the secondary support block (42). The limiting block (71) is rotatably connected to a limiting handle (72). A stop plate (73) is rotatably connected to the inner side of the limiting handle (72). The top of the stop plate (73) is higher than the material receiving groove (43) but not higher than the top surface of the glass substrate to be tested.

5. The sample loading fixture for stress testing according to claim 1, characterized in that, Both of the positioning seats (6) have a feed port (61) at their top, and the bottom surface of the two feed ports (61) is flush with the bottom surface of the material receiving groove (43). The two sides of the feed port (61) correspond to the two sides of the material receiving groove (43). The top of each positioning seat (6) is rotatably connected with a crimping handle (62).

6. The sample loading fixture for stress testing according to claim 1, characterized in that, The pressure plate mechanism (8) includes a receiving plate (81) fixedly connected to the outside of the main support block (41). A pressure plate frame (82) is fixedly connected to the top of the receiving plate (81). A main pressure base (83) is fixedly connected to the top of the pressure plate frame (82). A limit sleeve (84) is provided at the bottom of the main pressure base (83). A pressure rod (85) is slidably connected to the limit sleeve (84). A main pressure plate (86) is fixedly connected to the bottom surface of the pressure rod (85). (86) Both sides are slidably connected to the pressure plate frame (82) with limit posts (87). The top of the pressure rod (85) is rotatably connected to a crank block (88). The top of the crank block (88) is rotatably connected to a pressure handle (89). The pressure handle (89) is rotatably connected to the main pressure base (83). A positioning bolt (810) is installed between the main pressure plate (86) and the bottom of the pressure plate frame (82). A locking nut (811) is installed on the top of the positioning bolt (810).

7. A sample loading fixture for stress testing according to claim 6, characterized in that, The bottom surface of the main pressure plate (86) is provided with a convex pressure block, and its width is less than the width of the material receiving groove (43). The length of the convex pressure block is greater than the distance between the top adjacent surfaces of the main support block (41) and the secondary support block (42).

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