Bending mechanical property test assistive device and test equipment

Abstract

The utility model relates to the technical field of test detection jigs, and discloses a bending mechanical property test assistive device and test equipment, the bending mechanical property test assistive device comprises an adjusting groove, a lead screw assembly, a support assembly and a controller, the lower part of the adjusting groove is provided with a first fixing part; the number of the lead screw assemblies is two, and the two lead screw assemblies are coaxially and rotationally arranged in the adjusting groove and extend in the length direction of the adjusting groove. The number of the supporting assemblies is two, the two supporting assemblies are slidably connected with the adjusting groove in the length direction of the adjusting groove and are in driving connection with the two lead screw assemblies correspondingly, and lower supporting parts are arranged on the supporting assemblies correspondingly. The controller is in signal connection with the driving parts of the two lead screw assemblies. The two lead screw assemblies can be controlled by the controller to drive the two supporting assemblies to move in the length direction of the adjusting groove in a reciprocating mode. The bending mechanical property test assistive device and the test equipment disclosed by the utility model can solve or improve the problems that the stress of the sample does not meet the test requirements and the test result deviation is large.

Description

Technical Field

[0001] The present application relates to the technical field of test and detection fixtures, and specifically to bending mechanical properties test aids and test equipment. Background Art

[0002] In related technologies, a three-point bending test is often used when testing the bending mechanical properties and fracture toughness and other mechanical performance indicators of rigid and semi-rigid plastics. The three-point bending test is to place a strip specimen flat in a bending test fixture to form a simply supported beam. The distance between the two lower support parts of the specimen is adjusted according to the thickness and width of the specimen. There is a loading part above the specimen. When two equal moments are formed, three-point bending occurs, and the specimen will break at the midpoint.

[0003] When conducting a three-point bending test, for tests with different span requirements, it is necessary to manually move the positions of the two lower supports and then fix them with a wrench after determining the span size. This adjustment method has low precision and poor symmetry of the two lower supports relative to the loading part, causing the stress state of the specimen to fail to meet the test requirements, resulting in large deviations in the test results. Utility Model Content

[0004] In view of this, the present application provides a bending mechanical properties test aid and test equipment to solve or improve the problem that the specimen force does not meet the test requirements and the test results have large deviations.

[0005] On the one hand, the present application provides a bending mechanical properties test auxiliary device, including an adjustment slot, a screw assembly, a support assembly and a controller, wherein the lower part of the adjustment slot is provided with a first fixed part, which is suitable for positioning and connecting with the detection table of the test equipment; the two screw assemblies are provided, and the two screw assemblies are coaxially rotated and arranged in the adjustment slot, and both extend along the length direction of the adjustment slot; the two support assemblies are provided, and the two support assemblies are both slidably connected to the adjustment slot along the length direction of the adjustment slot, and are respectively driven and connected to the two screw assemblies, and a lower support part is provided on the support assembly, which is suitable for supporting the specimen; the controller is signal-connected to the driving components of the two screw assemblies; wherein the two screw assemblies can respectively drive the two support assemblies to move back and forth along the length direction of the adjustment slot under the control of the controller.

[0006] The two screw assemblies are used to drive the support assemblies each provided with a lower support part under the control of the controller, so as to adjust the positions of the two lower support parts respectively, thereby realizing automatic adjustment of the positions of the two lower support parts. Not only is the precision high, but the reference position of the loading part can be set in the controller, and the positions of the two support assemblies are symmetrically adjusted relative to the loading part to improve the symmetry of the two lower support parts relative to the loading part, so that the stress state of the specimen meets the test requirements and the deviation of the test results is reduced.

[0007] In an optional embodiment, the bending mechanical properties test aid also includes a displacement sensor and a distance measuring component, wherein the displacement sensor is arranged on the adjustment slot and is suitable for being located below the loading part of the test equipment to measure the deformation of the specimen; two distance measuring components are provided, and the two distance measuring components are respectively arranged on the support component to measure the distance from the displacement sensor; wherein the two distance measuring components and the displacement sensor are both connected to the controller signal.

[0008] In an optional embodiment, the support assembly includes a support seat and a support head, the support head is fixedly connected to the support seat and can be removed, the support seat is slidingly connected to the adjustment slot and is drivingly connected to the screw assembly, and the lower support portion is arranged on the support head.

[0009] In an optional embodiment, the support seat and the support head are adapted to be engaged with a card joint via a card joint slot, and the card joint slot can limit the upper edge of the card joint in a direction away from the other card joint.

[0010] In an optional embodiment, the lower support portion is in the shape of an arc column, and the arc surface on the lower support portion is used to contact the sample.

[0011] In an optional embodiment, the bending mechanical properties test aid further includes a compression elbow, on which a second fixing portion and a loading portion are provided, and the second fixing portion is used for positioning and connecting with the loading head of the test equipment.

[0012] In an optional embodiment, the first fixing portion is a positioning block; and / or the second fixing portion is a positioning block.

[0013] In an optional embodiment, the bending mechanical property test aid further includes a scale, which is arranged on the adjustment groove and extends along the length direction of the adjustment groove.

[0014] In an optional embodiment, the bending mechanical properties test aid also includes a supporting component, and two supporting components are provided. The two supporting components are connected to the bottom of the adjustment groove and are used to contact the bottom of the test equipment to support the bottom of the adjustment groove; and / or, the supporting component is an automatic telescopic component, and a pressure sensing component is provided at the part where the automatic telescopic component contacts the detection platform of the test equipment. The pressure sensing component is connected to the controller signal, and the controller can control the pressure of the supporting component on the detection platform of the test equipment according to the measurement value of the pressure sensing component.

[0015] On the other hand, the present application also provides a testing device, including a testing platform, a loading head and a bending mechanical performance testing aid as in any one of the above embodiments, wherein a first clamping part is provided on the testing platform; the loading head is located above the testing platform, for fixing the loading part, and can move up and down relative to the testing platform; the first fixing part of the adjustment slot is positioned and connected with the first clamping part.

[0016] Because the test equipment includes a bending mechanical properties test auxiliary device, which has the same technical effect as the bending mechanical properties test auxiliary device, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of this application or the technical solutions in related technologies, the following is a brief introduction to the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is an axial front view of a bending mechanical properties test aid according to an embodiment of the present application;

[0019] Figure 2 This is an axial front view of a bending mechanical properties test auxiliary tool according to an embodiment of the present application without a driving device;

[0020] Figure 3 This is a structural front view of a test device according to an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100. Bending mechanical properties test aids; 200. Specimen; 300. Test equipment;

[0023] 101. Adjustment slot; 102. Screw assembly; 103. Support assembly; 104. Displacement sensor; 105. Distance measuring assembly; 106. Compression elbow; 107. Scale; 108. Support component;

[0024] 1011, first fixing portion;

[0025] 1021, driving components;

[0026] 1031, lower support portion; 1032, support base; 1033, support head; 10321, snap-fit ​​groove; 10331, snap-fit ​​joint;

[0027] 1061, second fixing portion; 1062, loading portion;

[0028] 301, testing platform; 302, loading head;

[0029] 3011, first clamping portion; 3021, second clamping portion. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0031] In related technologies, a three-point bending test is often used when testing the bending mechanical properties and fracture toughness and other mechanical performance indicators of rigid and semi-rigid plastics. The three-point bending test is to place a strip specimen flat in a bending test fixture to form a simply supported beam. The distance between the two lower support parts of the specimen is adjusted according to the thickness and width of the specimen. There is a loading part above the specimen. When two equal moments are formed, three-point bending occurs, and the specimen will break at the midpoint.

[0032] When conducting a three-point bending test, for tests with different span requirements, it is necessary to manually move the positions of the two lower supports and then fix them with a wrench after determining the span size. This adjustment method has low precision and poor symmetry of the two lower supports relative to the loading part, causing the stress state of the specimen to fail to meet the test requirements, resulting in large deviations in the test results.

[0033] In order to solve the above technical problems, the present application provides a bending mechanical properties test aid and test equipment to solve or improve the problem that the force on the specimen does not meet the test requirements and the test results have large deviations.

[0034] The following combination Figures 1 to 3 , describing the embodiments of the present application.

[0035] According to an embodiment of the present application, on the one hand, a bending mechanical properties test aid 100 is provided, such as Figure 1 As shown, it includes an adjusting slot 101, a screw assembly 102, a support assembly 103 and a controller. The lower part of the adjusting slot 101 is provided with a first fixing part 1011, which is suitable for positioning and connecting with the detection table 301 of the test equipment 300; there are two screw assemblies 102, and the two screw assemblies 102 are coaxially arranged in the adjusting slot 101, and both extend along the length direction of the adjusting slot 101; there are two support assemblies 103, and the two support assemblies 103 are both slidably connected to the adjusting slot 101 along the length direction of the adjusting slot 101, and are respectively driven and connected to the two screw assemblies 102, and a lower support part 1031 is provided on the support assembly 103, which is suitable for supporting the sample 200; the controller is signal-connected to the driving parts 1021 of the two screw assemblies 102; wherein, the two screw assemblies 102 can respectively drive the two support assemblies 103 to move back and forth along the length direction of the adjusting slot 101 under the control of the controller.

[0036] Specifically, the shape of the adjustment slot 101 can be any shape, such as a rectangular slot, a rectangular slot, etc., as long as it can meet the requirements of this application; the driving component 1021 of the screw assembly 102 can be a motor, etc., and the driving components 1021 of the two screw assemblies 102 can be respectively arranged on the adjusting slot 101 at both ends along the length direction of the adjusting slot 101, and are respectively connected to the two screw assemblies 102 for transmission; the two ends of the screw can be rotatably connected to the adjusting slot 101 through bearings, and the controller is an integrated circuit, a computer host, a single-chip microcomputer, etc.

[0037] It should be noted that the two screw assemblies 102 are coaxially rotatably arranged in the adjustment slot 101 and both extend along the length direction of the adjustment slot 101 , that is, the two screw assemblies 102 are arranged in sequence along the length direction of the adjustment slot 101 .

[0038] It is worth noting that the driving component 1021 of the screw assembly 102 is connected to the controller signal, which can be specifically connected by wireless signals using a wireless transceiver or by electrical signals using a wiring harness.

[0039] In this embodiment, Figure 1 As shown, the two screw assemblies 102 are used to drive the support assemblies 103, each of which is provided with a lower support part 1031, respectively under the control of the controller to adjust the positions of the two lower support parts 1031 respectively, thereby realizing automatic adjustment of the positions of the two lower support parts 1031. Not only is the accuracy high, but the reference position of the loading part 1062 can be set in the controller, and the positions of the two support assemblies 103 are symmetrically adjusted relative to the loading part 1062 to improve the symmetry of the two lower support parts 1031 relative to the loading part 1062, so that the stress state of the sample 200 meets the test requirements and the deviation of the test results is reduced.

[0040] In one embodiment, Figure 3 As shown, the bending mechanical properties test aid 100 also includes a displacement sensor 104 and a distance measuring component 105. The displacement sensor 104 is arranged on the adjustment slot 101 and is suitable for being located below the loading part 1062 of the test equipment 300 to measure the deformation of the sample 200; there are two distance measuring components 105, and the two distance measuring components 105 are respectively arranged on the support component 103, for measuring the distance from the displacement sensor 104; wherein, the two distance measuring components 105 and the displacement sensor 104 are both connected to the controller signal.

[0041] Specifically, the displacement sensor 104 is an existing product, which can be a telescopic type sensor or an infrared ranging type sensor; the ranging component 105 is specifically an infrared ranging sensor.

[0042] It is worth noting that the two distance measuring components 105 and the displacement sensor 104 are both connected to the controller signal, specifically, they can be connected by wireless signals using a wireless transceiver, or they can be connected by electrical signals using a wiring harness.

[0043] In this embodiment, a displacement sensor 104 is fixedly provided on the adjustment slot 101 to measure the distance to the portion where the loading portion 1062 presses down on the specimen 200. The displacement sensor 104 is used as a reference, and the distance measuring component 105 on the support component 103 is used to measure the distance to the displacement sensor 104 in real time to adjust the position of the lower support portion 1031. The position of the lower support portion 1031 can be adjusted based on the actual reference, which is more accurate and further improves the accuracy of the test results.

[0044] In one embodiment, Figure 1 As shown, the support assembly 103 includes a support seat 1032 and a support head 1033. The support head 1033 is fixedly connected to the support seat 1032 and can be disassembled. The support seat 1032 is slidingly connected to the adjustment slot 101 and is drivingly connected to the screw assembly 102. The lower support portion 1031 is arranged on the support head 1033.

[0045] Specifically, the support head 1033 is fixedly connected to the support seat 1032 and can be detached. The connection can be made by bolting or clamping.

[0046] In this embodiment, the support assembly 103 is formed by detachably connecting the support base 1032 and the support head 1033, so that different types of support heads 1033 can be replaced on the support base 1032 to support specimens 200 of different sizes and specifications to meet the test requirements.

[0047] In one embodiment, Figure 1As shown, the support seat 1032 and the support head 1033 are adapted and engaged with the card joint 10331 through the card joint groove 10321 , and the card joint 10331 can limit the card joint 10331 in a direction away from the other card joint 10331 .

[0048] It should be noted that the snap-fitting groove 10321 can limit the snap-fitting groove 10321 in a direction away from the other snap-fitting joint 10331 , which means that a profile for limiting the snap-fitting joint 10331 is provided in the snap-fitting groove 10321 .

[0049] Specifically, the snap-fitting groove 10321 is a trapezoidal groove, and the surface of the trapezoidal groove close to the snap-fitting joint 10331 and the surface away from another snap-fitting joint 10331 are both opened. The snap-fitting joint 10331 is a trapezoidal block adapted to the snap-fitting groove 10321; of course, the snap-fitting groove 10321 and the snap-fitting joint 10331 can be other shapes.

[0050] In this embodiment, the support head 1033 and the support base 1032 are connected via the snap-fit ​​groove 10321 and the snap-fit ​​joint 10331 . The connection method is simple and easy to operate.

[0051] In one embodiment, Figure 2 As shown, the lower support portion 1031 is in an arc-shaped column, and the arc-shaped surface on the lower support portion 1031 is used to contact the sample 200.

[0052] Specifically, the central angle of the arc column is 90° to 300°, specifically any one of 90°, 120°, 150°, 180°, 210°, 240°, 270° and 300°; preferably 180°.

[0053] In this example, the shape of the lower support portion 1031 is set to be an arc columnar shape to meet the requirements of the experiment.

[0054] In one embodiment, Figure 3 As shown, the bending mechanical properties test aid 100 also includes a compression elbow 106, which is provided with a second fixing portion 1061 and a loading portion 1062. The second fixing portion 1061 is used for positioning and connecting with the loading head 302 of the test equipment 300. Specifically, the loading head 302 is provided with a second clamping portion 3021 to clamp the second fixing portion 1061.

[0055] In this example, the compression elbow 106 is provided with a second fixing portion 1061 , which can facilitate connection with the loading head 302 of the test equipment 300 .

[0056] In a specific embodiment, Figure 3As shown, the first fixing portion 1011 is a positioning block; and / or, the second fixing portion 1061 is a positioning block; in this embodiment, the first fixing portion 1011 and the second fixing portion 1061 are both positioning blocks, with a simple structure and easy connection operation.

[0057] In one embodiment, Figure 2 As shown, the bending mechanical performance test aid 100 also includes a scale 107, which is set on the adjustment slot 101 and extends along the length direction of the adjustment slot 101; in this embodiment, the accuracy of the scale 107 is at the millimeter level. By setting the scale 107, the specific positions of the two support components 103 can be visually observed to verify whether the test requirements are met.

[0058] In one embodiment, Figure 3 As shown, the bending mechanical properties test aid 100 also includes a support component 108, two support components 108 are provided, and the two support components 108 are connected to the bottom of the adjustment groove 101, and are used to contact the bottom of the test equipment 300 to support the bottom of the adjustment groove 101; and / or, the support component 108 is an automatic telescopic component, and the part where the automatic telescopic component contacts the detection platform 301 of the test equipment 300 is provided with a pressure sensing component, and the pressure sensing component is connected to the controller signal. The controller can control the pressure of the support component 108 on the detection platform 301 of the test equipment 300 according to the measurement value of the pressure sensing component.

[0059] Specifically, the support member 108 is a rectangular bracket, but may also be a member of other structural types, as long as it can support the adjustment slot 101. Furthermore, the support member 108 is an automatically retractable member, specifically a retractable cylinder, etc.; the pressure sensing component is an existing product, namely a pressure sensor, which can be selected and set according to actual needs.

[0060] In this embodiment, by arranging support components 108 at the bottom of both ends of the adjustment groove 101, the adjustment groove 101 can be prevented from being deformed due to the pressure load during the test, thereby improving the accuracy of the test results; further, the support component 108 is an automatic telescopic component, and a pressure sensing component is provided on the automatic telescopic component to control the supporting force of the support component 108 on the adjustment groove 101, and can adjust the supporting force of the support component 108 on the adjustment groove 101 according to the size of the pressure force received by various specimens 200, thereby reducing the deformation of the adjustment groove 101.

[0061] The present application is fully described below in combination with all the above technical solutions.

[0062] In one embodiment, the bending mechanical properties test aid 100, such as Figures 1 to 3As shown, it includes an adjustment slot 101, a screw assembly 102, a support assembly 103, a controller, a displacement sensor 104, a distance measuring assembly 105, a compression elbow 106, a scale 107 and a support component 108. The lower part of the adjustment slot 101 is provided with a first fixing portion 1011, which is suitable for positioning and connecting with the detection table 301 of the test equipment 300; there are two screw assemblies 102, which are coaxially rotated and arranged in the adjustment slot 101, and both extend along the length direction of the adjustment slot 101; there are two support assemblies 103, which are connected to the adjustment slot 101. The two screw assemblies 102 are connected in a sliding manner along the length of the adjustment slot 101 and are respectively connected to the two screw assemblies 102 for driving. The support assemblies 103 are each provided with a lower support portion 1031 suitable for supporting the sample 200. The controller is signal-connected to the driving components 1021 of the two screw assemblies 102. The two screw assemblies 102 can respectively drive the two support assemblies 103 to move back and forth along the length of the adjustment slot 101 under the control of the controller. The displacement sensor 104 is provided on the adjustment slot 101 and is suitable for being located below the loading portion 1062 of the test equipment 300 to measure the displacement of the sample 200. Deformation; There are two distance measuring components 105, and the two distance measuring components 105 are respectively arranged on the support component 103, for measuring the distance from the displacement sensor 104; wherein, the two distance measuring components 105 and the displacement sensor 104 are both connected to the controller signal; The compression elbow 106 is provided with a second fixing portion 1061 and a loading portion 1062, and the second fixing portion 1061 is used for positioning and connecting with the loading head 302 of the test equipment 300; Specifically, the first fixing portion 1011 is a positioning block; and / or, the second fixing portion 1061 is a positioning block; The scale 107 is provided on the adjustment slot 101 , and extends along the length direction of the adjustment groove 101; two support components 108 are provided, and the two support components 108 are connected to the bottom of the adjustment groove 101, and are used to contact the bottom of the test equipment 300 to support the bottom of the adjustment groove 101; and / or, the support component 108 is an automatic telescopic component, and the part where the automatic telescopic component contacts the detection platform 301 of the test equipment 300 is provided with a pressure sensing component, and the pressure sensing component is connected to the controller signal. The controller can control the pressure of the support component 108 on the detection platform 301 of the test equipment 300 according to the measurement value of the pressure sensing component.

[0063] Specifically, such as Figure 1As shown, the support assembly 103 includes a support seat 1032 and a support head 1033. The support head 1033 is fixedly connected to the support seat 1032 and can be disassembled. The support seat 1032 is slidingly connected to the adjustment slot 101 and is drivingly connected to the screw assembly 102. The lower support portion 1031 is arranged on the support head 1033; the support seat 1032 and the support head 1033 are adapted and connected with the card joint 10331 through the card joint groove 10321, and the card joint 10321 can limit the card joint 10331 in a direction away from the other card joint 10331; the lower support portion 1031 is an arc-shaped column, and the arc surface on the lower support portion 1031 is used to contact the sample 200.

[0064] According to an embodiment of the present application, on the other hand, a test device 300 is provided, such as Figure 3 As shown, it includes a testing platform 301, a loading head 302 and a bending mechanical performance test aid 100 in any one of the above embodiments, and a clamping part is provided on the testing platform 301; the loading head 302 is located above the testing platform 301, and is used to fix the loading part 1062, and can move up and down relative to the testing platform 301; the first fixing part 1011 of the adjustment slot 101 is positioned and connected with the clamping part.

[0065] Specifically, the testing platform 301 and the loading head 302 are universal material testing machines.

[0066] In the specific use process, combined with Figure 3 , taking sample A as an example to conduct a bending mechanical performance test, assuming that its average thickness is 3 mm, and according to the average thickness of sample A, select the lower support portion 1031 with a suitable center radius.

[0067] The adjusting tank 101 is moved onto the testing platform 301 , and the first fixing portion 1011 is clamped and fixed by the first clamping portion 3011 , and the compression elbow 106 is clamped and fixed in the second clamping portion 3021 on the loading head 302 by the second fixing portion 1061 .

[0068] The average thickness of sample A is input into the controller as 3 mm, and the controller calculates that the span between the two lower support parts 1031 is 48 mm (the span is 16 times the average thickness of sample 200, that is, 3 mm×16), and then sends a drive signal to the two drive components 1021 to move the two support assemblies 103. The ranging components 105 on the two support assemblies 103 respectively feed back the distance between the two support assemblies 103 and the displacement sensor 104 to the controller in real time, so that the controller can control the action of the two drive components 1021 until the span of the two support assemblies 103 meets the requirements, and then stop the control action of the two drive components 1021. At this time, the screw assembly 102 has a self-locking function, which can keep the position of the two screw assemblies 102 unchanged.

[0069] The load value of sample A is input into the controller to control the extension of the two supporting components 108 to adjust the support force on the adjustment groove 101. For example, if the load value of sample A is 300N, the support force of the two supporting components 108 on the adjustment groove 101 can be adjusted to 100N, or other values ​​to reduce the deformation of the adjustment groove 101.

[0070] Then, the sample A is placed on the two lower support parts 1031 , the loading head 302 is controlled to descend, and the sample A is tested through the loading part 1062 on the compression elbow 106 .

[0071] In this embodiment, since the testing device 300 includes the bending mechanical property testing aid 100 and has the same technical effects as the bending mechanical property testing aid 100 , detailed description thereof is omitted here.

[0072] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A bending mechanical properties test aid, characterized in that: include: An adjustment groove (101), wherein a first fixing portion (1011) is provided at a lower portion of the adjustment groove (101), suitable for positioning and connecting with a detection table (301) of a test device (300); A screw assembly (102), wherein two screw assemblies (102) are provided, and the two screw assemblies (102) are coaxially rotatably arranged in the adjustment slot (101), and both extend along the length direction of the adjustment slot (101); A support assembly (103), wherein two support assemblies (103) are provided, and the two support assemblies (103) are both slidably connected to the adjustment slot (101) along the length direction of the adjustment slot (101), and are respectively drivingly connected to the two lead screw assemblies (102), and each support assembly (103) is provided with a lower support portion (1031) suitable for supporting the sample (200); and a controller, the controller being in signal connection with the drive components (1021) of the two lead screw assemblies (102); a displacement sensor (104), the displacement sensor (104) being arranged on the adjustment slot (101) and being adapted to be located below the loading portion (1062) of the test device (300) to measure the deformation of the specimen (200); Wherein, the two screw assemblies (102) can respectively drive the two support assemblies (103) to move back and forth along the length direction of the adjustment slot (101) under the control of the controller.

2. The bending mechanical properties test aid according to claim 1, characterized in that: Also includes: a distance measuring assembly (105), wherein two distance measuring assemblies (105) are provided, and the two distance measuring assemblies (105) are respectively provided on the support assembly (103) and are used to measure the distance from the displacement sensor (104); Wherein, the two distance measuring components (105) and the displacement sensor (104) are both connected to the controller signal.

3. The bending mechanical properties test aid according to claim 1, characterized in that: The support assembly (103) comprises a support seat (1032) and a support head (1033); the support head (1033) is fixedly connected to the support seat (1032) and can be disassembled; the support seat (1032) is slidably connected to the adjustment slot (101) and is drivingly connected to the screw assembly (102); and the lower support portion (1031) is arranged on the support head (1033).

4. The bending mechanical properties test aid according to claim 3, characterized in that: The support seat (1032) and the support head (1033) are adapted and connected to the card joint (10331) through the card joint groove (10321), and the card joint groove (10321) can limit the direction of the card joint (10331) away from the other card joint (10331).

5. The bending mechanical properties test aid according to any one of claims 1 to 4, characterized in that: The lower support portion (1031) is in the shape of an arc column, and the arc surface on the lower support portion (1031) is used for contacting the sample (200).

6. The bending mechanical properties test aid according to any one of claims 1 to 4, characterized in that: The invention also comprises a compression elbow (106), on which a second fixing portion (1061) and a loading portion (1062) are provided. The second fixing portion (1061) is used for positioning and connecting with the loading head (302) of the test equipment (300).

7. The bending mechanical properties test aid according to claim 6, characterized in that: The first fixing portion (1011) is a positioning block; And / or, the second fixing portion (1061) is a positioning block.

8. The bending mechanical properties test aid according to any one of claims 1 to 4, characterized in that: It also includes a scale (107), which is arranged on the adjustment slot (101) and extends along the length direction of the adjustment slot (101).

9. The bending mechanical properties test aid according to any one of claims 1 to 4, characterized in that: It also includes a supporting component (108), wherein two supporting components (108) are provided, and the two supporting components (108) are connected to the bottom of the adjusting tank (101) and are used to contact the bottom of the test device (300) to support the bottom of the adjusting tank (101); And / or, the support component (108) is an automatic telescopic component, and a pressure sensing component is provided at a portion where the automatic telescopic component contacts the detection platform (301) of the test equipment (300), and the pressure sensing component is connected to the controller signal, and the controller can control the pressure of the support component (108) on the detection platform (301) of the test equipment (300) according to the measurement value of the pressure sensing component.

10. A test device, characterized in that: include: A testing platform (301), wherein a first clamping portion (3011) is provided on the testing platform (301); a loading head (302), the loading head (302) being located above the detection platform (301), being used to fix the loading portion (1062), and being able to move up and down relative to the detection platform (301); and According to the bending mechanical properties testing aid (100) according to any one of claims 1 to 9, the first fixing portion (1011) of the adjustment groove (101) is positioned and connected to the first clamping portion (3011).

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