Tensile fatigue testing device and testing method

Abstract

The invention discloses a tensile fatigue testing device and method, and relates to the technical field of fatigue testing equipment, and the tensile fatigue testing device comprises a first fixing part which is used for connecting a first end of a to-be-tested part; the second fixing piece is movably arranged relative to the first fixing piece, and the second fixing piece is used for being connected with the second end of the to-be-tested piece; the periphery of the first fixing piece and the periphery of the second fixing piece are both provided with the locking assemblies, and the locking assemblies are used for abutting against the end face of the first end of the to-be-tested piece or the end face of the second end of the to-be-tested piece so that the first fixing piece and the second fixing piece can be reinforced relative to the to-be-tested piece; the moving assembly is connected to the second fixing member or the first fixing member and is used for driving the to-be-tested member to move for testing. The end faces of the two ends of the to-be-tested piece are tightly jacked through the locking assembly so as to be matched with the first fixing piece and the second fixing piece to fix the to-be-tested piece, reliable jacking of the to-be-tested piece is further guaranteed, reinforcing of the to-be-tested piece is achieved, and it is guaranteed that the to-be-tested piece is reliable and stable during testing.

Description

Technical Field

[0001] The present invention relates to the technical field of fatigue testing equipment, and more particularly to a tensile fatigue testing device and a testing method. Background Art

[0002] With the development of industrial manufacturing and materials science, elastomeric materials have been widely used in the automotive, aerospace, marine, and other fields due to their excellent elasticity, wear resistance, and impact resistance. During use, if fatigue failure occurs, it may cause equipment failure or safety accidents. Therefore, fatigue verification is necessary to ensure product reliability.

[0003] In fatigue testing of elastomers, reliable fixation of the elastomer to the test equipment is closely related to the accuracy and effectiveness of the test. However, in practical applications, elastomer fixation failure often occurs, affecting the test process.

[0004] In summary, how to ensure reliable fixation of the elastic body relative to the testing equipment is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a tensile fatigue testing device that can ensure reliable fixation of an elastic body relative to a testing device. Another object of the present invention is to provide a testing method for the tensile fatigue testing device.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A tensile fatigue testing device, comprising:

[0008] A first fixing member, used for connecting to a first end of the device under test;

[0009] a second fixing member, movably arranged relative to the first fixing member, and configured to connect to the second end of the device under test;

[0010] A locking assembly is provided on the outer periphery of the first fixing member and the outer periphery of the second fixing member, and the locking assembly is used to tighten against the first end surface of the workpiece to be tested or the second end surface of the workpiece to be tested, so as to form a reinforcement of the first fixing member and the second fixing member relative to the workpiece to be tested;

[0011] The moving component is connected to the second fixing member or the first fixing member, and is used to drive the test piece to move for testing.

[0012] Preferably, the locking assembly includes a locking member and a gasket, the locking member is threadedly connected to the first fixing member or the second fixing member, and tightening the locking member is used to press the gasket in a direction close to the test piece.

[0013] Preferably, the first fixing member and the second fixing member are both studs, and the external threads of the studs are used to connect with the corresponding internal threads of the first end of the piece to be tested or the second end of the piece to be tested.

[0014] Preferably, a screw joint is provided between the movable assembly and the second fixing member, the first side of the screw joint is connected to the movable assembly, the second side of the screw joint is provided with a threaded hole connected to the second fixing member, and the depth of the second fixing member extending into the threaded hole is adjustable.

[0015] Preferably, the portion of the second fixing member connected to the threaded hole is provided with the locking assembly, and the locking assembly is connected to the second fixing member and is used to contact the outer periphery of the threaded hole so as to be able to tighten against the screw joint.

[0016] Preferably, the first side of the screw joint is connected to the moving assembly through a fisheye joint, the fisheye portion of the fisheye joint and the first side of the screw joint are coaxially arranged, and the axis of the fisheye portion is arranged perpendicular to the axis of the screw joint.

[0017] Preferably, the first side of the screw joint is provided with at least two extensions, any of which extends along the axial direction of the threaded hole, and the extension is provided with a connecting hole for connecting the fisheye part, and the connecting hole and the fisheye part are coaxially arranged and connected by a fastener.

[0018] Preferably, the moving assembly includes a servo motor arranged on a support frame, and a telescopic rod connected to the servo motor, wherein the telescopic rod is connected to a side of the fisheye joint away from the fisheye portion, and the servo motor is used to drive the telescopic rod to move back and forth so as to be able to test the piece to be tested;

[0019] The guide member is further provided, wherein the guide member is arranged in a mounting hole of the telescopic rod passing through the support frame; or the guide member is arranged on the support arm of the support frame along the moving direction of the telescopic rod;

[0020] It also includes a limiting member, which is arranged on the supporting frame to limit the moving range of the telescopic rod.

[0021] Preferably, the device further comprises a support frame, and a medium chamber detachably mounted on the support frame, wherein the medium chamber is used to contain a medium liquid capable of immersing the test piece;

[0022] The medium compartment can be opened and closed so that the test piece can be moved into or out of the medium compartment;

[0023] The medium bin is a transparent bin, and the transparent bin is provided with at least a drain outlet and a water inlet.

[0024] The present invention further provides a testing method, which is applied to any of the above-mentioned tensile fatigue testing devices, and the testing method comprises:

[0025] When the first fixing member, the second fixing member and the locking assembly fix the workpiece to be tested, and the second fixing member is connected to the moving assembly, the operation of the moving assembly is controlled based on a preset stretching speed, a preset stretching length, and a preset number of stretching times;

[0026] Based on the detection component corresponding to the piece to be tested, the real-time displacement of the piece to be tested is obtained and displayed on a display device.

[0027] The tensile fatigue testing device provided by the present invention includes a first fixing member, a second fixing member, a locking assembly and a moving assembly, wherein the first fixing member is used to connect the first end of the workpiece to be tested, and the second fixing member is used to connect the second end of the workpiece to be tested, and the moving assembly can drive the workpiece to be tested to move for tensile testing by being connected to the second fixing member or the second fixing member, specifically, it can be fixed by the first end or the second end of the workpiece to be tested, and the other end of the workpiece to be tested can be driven to move by the moving assembly to cause tensile deformation of the workpiece to be tested; the outer periphery of the first fixing member and the outer periphery of the second fixing member are both provided with a locking assembly, when the locking assembly is connected to the first fixing member, it can be pressed against the first end face of the workpiece to be tested, and when the locking assembly is connected to the second fixing member, it can be pressed against the second end face of the workpiece to be tested, so that the arrangement of the locking assembly can form a reinforcement of the first fixing member and the second fixing member relative to the workpiece to be tested, that is, on the basis of the first fixing member and the second fixing member being connected to the two ends of the workpiece to be tested, the locking assembly can be used to reinforce the workpiece to prevent either end of the workpiece from slipping, thereby ensuring reliable stability of the workpiece during testing.

[0028] The beneficial effect of the present invention is that: through the setting of the locking assembly, the end faces of the two ends of the workpiece to be tested can be tightened, so as to cooperate with the first fixing member and the second fixing member to fix the workpiece to be tested, further ensure the reliable tightening of the workpiece to be tested, realize the reinforcement of the workpiece to be tested, and ensure the reliable stability of the workpiece to be tested during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of the tensile fatigue testing device provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the tensile fatigue testing device provided by the present invention;

[0032] Figure 3 for Figure 2 A partial enlarged view of

[0033] Figure 4 This is a schematic structural diagram of the screw joint provided by the present invention;

[0034] Figure 5 for Figure 4 A top view of

[0035] Figure 6 This is a schematic structural diagram of the fisheye joint provided by the present invention;

[0036] Figure 7 This is a schematic diagram of the operation interface provided by the present invention.

[0037] Figure 1-Figure 7 , the reference numerals include:

[0038] 1-first fixing member; 2-second fixing member; 3-locking assembly; 4-test piece; 5-medium compartment; 6-screw joint; 7-fisheye joint; 8-moving assembly; 9-fastener; 10-control device; 11-support frame; 31-locking member; 32-gasket; 51-drain outlet; 61-threaded hole; 62-extension part; 621-connecting hole; 71-fisheye part; 81-telescopic rod. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] The core of the present invention is to provide a tensile fatigue testing device that can ensure the reliability and stability of the test piece during testing. Another core of the present invention is to provide a testing method for the tensile fatigue testing device.

[0041] The tensile fatigue testing device provided by the present invention includes a first fixing member 1, a second fixing member 2, a locking assembly 3 and a moving assembly 8, please refer to Figure 1 、 Figure 2 .

[0042] The first fixing member 1 is used to connect to the first end of the device under test 4, and the second fixing member 2 is used to connect to the second end of the device under test 4. The connection here is a detachable connection. After the test is completed, the device under test 4 can be easily detached from the first fixing member 1 and the second fixing member 2. The detachable connection can be in the form of a thread, a buckle, a clamp, etc.

[0043] The test piece 4 may be a component made of metal, alloy, rubber or other materials, an automobile component, an electronic component such as a wire or cable or a connector, an elastic component in a medical device, etc., without any specific limitation.

[0044] Second fixture 2 is movable relative to first fixture 1, specifically via movable assembly 8. When movable assembly 8 is connected to first fixture 1, the first end of DUT 4 is movable, while the second end of DUT 4 remains relatively fixed. During a tensile fatigue test, movable assembly 8 is used to move the first end of DUT 4.

[0045] When the movable component 8 is connected to the second fixing component 2, the second end of the test piece 4 can be movably arranged, while the first end of the test piece 4 is relatively fixed. When performing a tensile fatigue test, the second end of the test piece 4 can be moved by the movable component 8.

[0046] It should be noted that the first end or the second end of the test piece 4 is relatively fixed, which can be achieved by the corresponding first fixing member 1 being able to be reliably fixed to the operating table, the ground or other fixed body, or by the corresponding second fixing member 2 being able to be reliably fixed to the operating table, the ground or other fixed body.

[0047] Specifically, during the test, the first end and the second end of the test piece 4 can be the two ends in the height direction, the two ends in the length direction, or the two ends in the width direction. The specific movement of either end is determined based on actual needs and is not specifically limited here.

[0048] For example, with the first end and the second end of the test piece 4 being the two ends in the height direction, the relatively lower first end can be fixed and the relatively higher second end can be moved to stretch the test piece 4 for a tensile fatigue test.

[0049] The locking assembly 3 is provided on the outer periphery of the first fixing member 1 so as to be able to press against the first end face of the test piece 4; the locking assembly 3 is provided on the outer periphery of the second fixing member 2 so as to be able to press against the second end face of the test piece 4. Specifically, when the locking assembly 3 is installed on the outer periphery of the first fixing member 1, it can move to approach the first end of the test piece 4 and press against the end face of the first end; and when the locking assembly 3 is installed on the outer periphery of the second fixing member 2, it can move to approach the second end of the test piece 4 and press against the end face of the second end. By providing the locking assembly 3, the first fixing member 1 and the second fixing member 2 can be reinforced relative to the test piece 4. Reinforcement here refers to further fixing the test piece 4 on the basis of the fixing effect of the first fixing member 1 and the second fixing member 2, so as to ensure the reliability of the fixation of the test piece 4 and prevent the test piece 4 from falling or slipping during the test.

[0050] Taking a specific embodiment as an example, the first fixing member 1 and the second fixing member 2 are both clamped and connected to the workpiece 4, and the locking assembly 3 can be threadedly connected to the first fixing member 1 and the second fixing member 2 to provide a clamping force on the end face of the workpiece 4 to ensure reliable fixation of the workpiece 4 through the clamping force combined with the clamping force.

[0051] Taking another specific embodiment as an example, the first fixing member 1 and the second fixing member 2 are both threadedly connected to the workpiece to be tested 4, and the locking assembly 3 is also threadedly connected to the first fixing member 1 and the second fixing member 2 to provide a clamping force on the end face of the workpiece to be tested 4, so as to ensure the reliable fixation of the workpiece to be tested 4 by the knob force and clamping force generated by the threaded connection.

[0052] In this embodiment, it should be noted that, by means of a plurality of locking assemblies 3 being reliably fixed to the first fixing member 1 and a plurality of locking assemblies 3 being reliably fixed to the second fixing member 2, a tightening force toward the middle position can be formed from both ends of the piece to be tested 4, so that both ends of the piece to be tested 4 can be limited to avoid falling off.

[0053] In this embodiment, taking the test piece 4 as an elastic body as an example, the two ends of the test piece 4 are actually joints. Pressing the joints by the locking assembly 3 does not cause compression of the elastic material, and does not affect the accuracy and reliability of the subsequent tensile test.

[0054] Based on the above examples, please refer to Figure 2 、 Figure 3 The locking assembly 3 includes a locking member 31 and a gasket 32. The locking member 31 is threadedly connected to the first fixing member 1 or the second fixing member 2. Tightening the locking member 31 is used to press the gasket 32 toward the direction close to the test piece 4.

[0055] The locking member 31 is securely fixed relative to the first fixing member 1 or the second fixing member 2 through a threaded connection. The locking member 31 is relatively tightened until the gasket 32 is pressed against the first end face or the second end face of the workpiece 4 to generate a clamping force. Alternatively, a plurality of locking members 31 are provided, with gaskets 32 provided between adjacent locking members 31, and a gasket 32 is provided between the locking member 31 close to the workpiece 4 and the workpiece 4. Similarly, by relatively tightening the locking members 31 until the gasket 32 is pressed, a clamping force can also be generated to press the end faces of both ends of the workpiece 4.

[0056] In this embodiment, by providing a gasket 32 between the locking member 31 and the workpiece to be tested 4, the locking member 31 can be prevented from damaging the surface of the workpiece to be tested 4, and the workpiece to be tested 4 can be prevented from being deformed or damaged due to direct compression of the locking member 31. The risk of damage caused by local concentration of pressure is reduced by increasing the contact area.

[0057] In a specific embodiment, the locking member 31 is a nut, which has a simple structure and low cost. The outer circumferential size of the locking member 31 is larger than the outer circumferential size of the end faces corresponding to the first end and the second end of the test piece 4, ensuring reliable pressing of the test piece 4 and ensuring a reliable reinforcement effect.

[0058] In this embodiment, the location and number of the gaskets 32 are determined according to actual test requirements and are not limited.

[0059] Based on any of the above embodiments, please refer to Figure 2 The first fixing member 1 and the second fixing member 2 are both studs, and the external threads of the studs are used to connect with the internal threads corresponding to the first end of the test piece 4 or the second end of the test piece 4.

[0060] The outer circumference of the stud is provided with an external thread, and the first end and the second end of the workpiece 4 to be tested are both provided with an internal thread, which can form a threaded connection with the internal thread of the workpiece 4 to be tested. Furthermore, through the threaded connection formed between the locking member 31 and the external thread, the reliable stability of the fixation of the workpiece 4 to be tested is guaranteed, and the reliability of the test is guaranteed.

[0061] For the stud, if it needs to be fixed so that any end of the corresponding test piece 4 can be fixed, it can be connected to the fixing platform by welding or threading. The fixing platform here can be a workbench or any fixed structural member.

[0062] In this embodiment, both the first and second fixing members 1 and 2 are made of 316L stainless steel, which has excellent corrosion resistance. The corresponding locking assemblies 3 on the first and second fixing members 1 and 2 prevent the stud connection from loosening under vibration, impact, or load conditions, thereby ensuring reliable fixation of the test object 4 and ensuring test reliability.

[0063] Based on any of the above embodiments, please refer to Figure 2 A screw joint 6 is provided between the moving component 8 and the second fixing component 2, that is, the moving component 8 is connected to the second fixing component 2 through the screw joint 6, so that the second end of the test piece 4 fixed by the second fixing component 2 can be driven to move by driving the second fixing component 2, so as to be able to perform a fatigue tensile test.

[0064] The first side of the screw joint 6 is connected to the movable assembly 8, and the second side of the screw joint 6 is provided with a threaded hole 61 connected to the second fixing member 2. The threaded hole 61 and the external thread of the second fixing member 2 are connected to form a reliable fixation between the screw joint 6 and the second fixing member 2. The first side of the screw joint 6 can be connected to the movable assembly 8 directly or through an intermediate structural member, and the specific setting is based on actual use requirements.

[0065] The depth to which the second fixing member 2 extends into the threaded hole 61 is adjustable, allowing the testing device to be adaptively adjusted according to the actual size of the test object 4. Specifically, the adaptability adjustment is to adjust the size of the portion of the second fixing member 2 extending relative to the screw joint 6. If the test object 4 is relatively tall, the size of the portion of the second fixing member 2 extending from the screw joint 6 can be adaptively reduced, thereby improving the adaptability of the testing device.

[0066] Based on any of the above embodiments, please refer to Figure 2 、 Figure 3 The portion of the second fixing member 2 connected to the threaded hole 61 is provided with a locking assembly 3 , which is connected to the second fixing member 2 and is used to contact the outer periphery of the threaded hole 61 so as to be able to tighten against the screw joint 6 .

[0067] In order to ensure reliable fixation between the second fixing member 2 and the screw joint 6, a locking assembly 3 is threadedly connected to the second fixing member 2 so as to contact the threaded hole 61 of the screw joint 6 to generate a force to tighten the screw joint 6.

[0068] like Figure 2 As shown, locking assemblies 3 are provided at both ends of the second fixing member 2. The locking assembly 3 on one side is used to tighten against the end surface of the second end of the test piece 4, while the locking assembly 3 on the other side can tighten against the outer periphery of the threaded hole 61 of the screw connector 6. Due to the configuration of the second fixing member 2 as a stud, the locking assemblies 3 on both sides can be reliably and conveniently assembled and disassembled, improving ease of operation.

[0069] In this embodiment, the locking assembly 3 provided at the portion of the second fixing member 2 connected to the threaded hole 61 also includes a locking member 31 and a gasket 32. The gasket 32 is specifically provided on the outer end surfaces of the locking member 31 and the threaded hole 61. By tightening the locking member 31 to compress the gasket 32, a tightening force can be provided to press against the screw joint 6, thereby ensuring a reliable connection between the second fixing member 2 and the screw joint 6 and ensuring reliable stability of the test.

[0070] Based on any of the above embodiments, please refer to Figure 2 The first side of the screw joint 6 is connected to the moving component 8 through the fisheye joint 7. The fisheye portion 71 of the fisheye joint 7 is coaxially arranged with the first side of the screw joint 6, and the axis of the fisheye portion 71 is perpendicular to the axis of the screw joint 6.

[0071] Please refer to Figure 6 One end of the fisheye joint 7 is a fisheye portion 71, and the other end is a connecting portion that can be connected to the moving component 8, wherein the fisheye portion 71 can be coaxially arranged and connected to the first side of the screw joint 6. The specific connection can be achieved with the help of a fastening screw. This setting can avoid the failure of components caused by the threaded connection affecting the progress of the entire test.

[0072] More specifically, by arranging the axis of the fisheye portion 71 perpendicular to the axis of the screw joint 6, the fisheye portion 71 and the screw joint 6 are prevented from being subjected to a large axial force causing connection failure during the tensile fatigue test, thereby ensuring the reliability of the test.

[0073] Based on any of the above embodiments, please refer to Figure 4 、 Figure 5 The first side of the screw joint 6 is provided with at least two extension portions 62, and any extension portion 62 extends along the axial direction of the threaded hole 61. The extension portion 62 is provided with a connecting hole 621 for connecting to the fisheye portion 71. The connecting hole 621 and the fisheye portion 71 are coaxially arranged and connected by a fastener 9.

[0074] The extension portion 62 can be arranged to avoid the threaded hole 61 , and the fastener 9 can be fastened after passing through the connecting hole 621 and the fisheye portion 71 , specifically by means of nuts, bolts and other components.

[0075] The provision of at least two extension portions 62 can ensure a reliable fastening effect by increasing the contact area between the fisheye joint 7, the screw joint 6 and the fastener 9, thereby ensuring reliable fixation of the fisheye joint 7 and the screw joint 6, that is, ensuring relatively reliable installation of the second end of the test piece 4 and ensuring the reliability of the test.

[0076] In this embodiment, the specific form of the extension portion 62 is not limited, and the design can be based on the actual device layout requirements to avoid interference between components.

[0077] Based on any of the above embodiments, please refer to Figure 1 The moving assembly 8 includes a servo motor mounted on the support frame 11 and a telescopic rod 81 connected to the servo motor. The telescopic rod 81 is connected to the side of the fisheye joint 7 away from the fisheye portion 71. The servo motor drives the telescopic rod 81 back and forth to enable testing of the DUT 4. The servo motor provides power to the DUT 4 during the tensile fatigue test. The servo motor model can be adjusted based on the performance of the DUT 4 to ensure reliable tensile power.

[0078] The connection between the side of the fisheye joint 7 away from the fisheye portion 71 and the telescopic rod 81 also needs to ensure reliability, which can be achieved with the help of the locking assembly 3 or by other forms of components, such as a locking pin.

[0079] The testing device also includes a guide member, which is arranged in the mounting hole of the telescopic rod 81 passing through the support frame 11; in this case, the guide member can specifically be a guide bearing installed in the mounting hole, which can provide a guide for the telescopic movement of the telescopic rod 81, ensure the accuracy of the moving route, and thus ensure the reliability of the test.

[0080] Alternatively, the guide member is arranged on the support arm of the support frame 11 along the moving direction of the telescopic rod 81; in this case, the guide member can specifically be in the form of a combination of slide rails and sliders, such as a slide rail is set on the straight arm, and the telescopic rod 81 is connected to the slider, which can provide a guiding effect for the movement of the telescopic rod 81, ensure the accuracy of the moving route, and thus ensure the reliability of the test.

[0081] The limit of the movement of the telescopic rod 81 can be achieved by a limiter arranged on the support frame 11. The limiter here can be a limit sensor switch or a mechanical limit block, which can limit the movement range of the telescopic rod 81 and ensure the safety and reliability of the movement.

[0082] In addition to the setting of the limit member, an emergency stop switch can also be set to manually shut down the test device in an emergency to avoid accidents.

[0083] Based on any of the above embodiments, please refer to Figure 1 、 Figure 2The test device also includes a support frame 11 and a medium tank 5 detachably mounted on the support frame 11. The medium tank 5 is used to contain a medium liquid capable of immersing the test piece 4. The material of the medium tank 5 can be specifically high borosilicate glass, which has good chemical stability, good acid resistance, alkali resistance and hydrolysis resistance, and has reliable performance. By equipping different medium solutions, it is possible to simulate the tensile fatigue test of the test piece 4 in different environments, or meet the tensile fatigue test requirements of different test pieces 4 in corresponding medium solutions, thereby improving the applicability of the test device and meeting the needs of different fields and application scenarios, such as automobiles, aerospace, and marine fields.

[0084] The media compartment 5 is designed to be openable and closable, allowing the test piece 4 to be moved in and out of the compartment. It should be noted that the top of the compartment 5 is initially provided with an opening that allows the movable assembly 8 to move and extend the test piece 4. To facilitate the assembly and disassembly of the test piece 4, an openable and closable cover can also be provided on the side of the compartment 5. This configuration can improve the convenience of the test. However, a good seal must be maintained between the cover and the side of the compartment 5. This can be achieved with the aid of a seal. Specifically, the seal is embedded in the cover or side, ensuring a reliable seal when the cover is closed relative to the side.

[0085] In addition, in order to facilitate the disassembly and assembly of the test piece 4, the test piece 4 can also be removed by removing the medium chamber 5 as a whole. In this case, the side of the medium chamber 5 does not need to be opened to avoid leakage of the medium solution.

[0086] The medium chamber 5 is a transparent chamber, which is convenient for the operator to directly observe the test process, is conducive to observing the state of the test piece 4, and is convenient for timely discovering fatigue cracks, deformation and other phenomena of the sample and dealing with potential problems.

[0087] The transparent chamber is provided with at least a drain port 51 and a water inlet. The drain port 51 is used to discharge the medium solution, while the water inlet is used to introduce the medium solution or cleaning fluid. This facilitates cleaning, ensures the environmental requirements of the next test, and reduces maintenance time and workload. The drain port 51 can also be connected to a waste liquid bucket to collect waste liquid for further treatment.

[0088] The above-mentioned tensile fatigue testing device is powered by a servo motor. The model of the servo motor can be adjusted according to the performance of the test piece 4 to adapt to the testing of materials with different strengths and stiffnesses, making the device more widely applicable and flexible. Combined with the precise displacement control of the telescopic rod 81, it can achieve high-precision tensile fatigue testing, ensure the accuracy and reliability of the test results, provide strong support for material performance evaluation, and facilitate research and development and quality control. The design of the telescopic rod 81 allows it to be freely extended or shortened during the tensile fatigue test, adapting to different length requirements and meeting the testing requirements of samples of different sizes. It is equipped with an emergency stop switch to quickly stop the test in an emergency to avoid accidents. At the same time, a limit sensing switch is set on the outside of the telescopic rod 81 to prevent excessive displacement of the telescopic rod 81 from causing test failure, ensuring the safety of the test process.

[0089] By improving test efficiency and reducing maintenance costs, this test device can bring significant cost benefits to enterprises in the long term, while improving the accuracy and reliability of test results, helping to improve product quality and market competitiveness.

[0090] In addition to the above-mentioned tensile fatigue testing device, the present invention further provides a testing method including the tensile fatigue testing device disclosed in the above-mentioned embodiment, the testing method comprising:

[0091] The first fixing member 1, the second fixing member 2 and the locking assembly 3 are used to fix the test piece 4, and the second fixing member 2 is connected to the moving assembly 8. Then, according to the test requirements, the well-proportioned solution is poured into the transparent medium chamber 5 until the solution completely submerges the test piece 4.

[0092] The control device 10 controls the operation of the moving component 8 based on the preset stretching speed, the preset stretching length, and the preset stretching times. Figure 7 Specifically, the operator can click on the operation interface to start the control program that controls the operation of the mobile component 8, so that the test conditions can be customized according to the user's needs. After the number of cycles reaches the set number, the mobile component 8 will automatically stop, improving test efficiency and reducing manual intervention.

[0093] Based on the detection component corresponding to the piece to be tested 4, the real-time displacement of the piece to be tested 4 is obtained and displayed on the display device. The data can also be exported for use by the user.

[0094] After the test is finished, the medium solution in the medium chamber 5 is drained out through the drain port 51 and the test piece 4 is removed.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] The above is a detailed introduction to the tensile fatigue testing device and testing method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core ideas of the present invention. It should be pointed out that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tensile fatigue testing device, characterized in that: include: A first fixing member (1) for connecting to a first end of a test piece (4); a second fixing member (2) movably arranged relative to the first fixing member (1), the second fixing member (2) being used to connect to the second end of the test piece (4); A locking assembly (3), wherein the outer periphery of the first fixing member (1) and the outer periphery of the second fixing member (2) are both provided with the locking assembly (3), and the locking assembly (3) is used to press against the first end face of the test piece (4) or the second end face of the test piece (4) to form a reinforcement of the first fixing member (1) and the second fixing member (2) relative to the test piece (4); A moving component (8) is connected to the second fixing member (2) or the first fixing member (1) and is used to drive the test piece (4) to move for testing.

2. The tensile fatigue testing device according to claim 1, characterized in that: The locking assembly (3) comprises a locking member (31) and a gasket (32), wherein the locking member (31) is threadedly connected to the first fixing member (1) or the second fixing member (2), and the tightening of the locking member (31) is used to press the gasket (32) in a direction close to the test piece (4).

3. The tensile fatigue testing device according to claim 2, characterized in that: The first fixing member (1) and the second fixing member (2) are both studs, and the external threads of the studs are used to connect with the corresponding internal threads of the first end of the test piece (4) or the second end of the test piece (4).

4. The tensile fatigue testing device according to claim 1, characterized in that: A screw joint (6) is provided between the movable assembly (8) and the second fixing member (2); a first side of the screw joint (6) is connected to the movable assembly (8); a second side of the screw joint (6) is provided with a threaded hole (61) connected to the second fixing member (2); and the depth of the second fixing member (2) extending into the threaded hole (61) is adjustable.

5. The tensile fatigue testing device according to claim 4, characterized in that: The portion of the second fixing member (2) connected to the threaded hole (61) is provided with the locking assembly (3), and the locking assembly (3) is connected to the second fixing member (2) and is used to contact the outer periphery of the threaded hole (61) so as to be able to press against the screw joint (6).

6. The tensile fatigue testing device according to claim 5, characterized in that: The first side of the screw joint (6) is connected to the moving assembly (8) via a fisheye joint (7); the fisheye portion (71) of the fisheye joint (7) and the first side of the screw joint (6) are coaxially arranged, and the axis of the fisheye portion (71) is perpendicular to the axis of the screw joint (6).

7. The tensile fatigue testing device according to claim 6, characterized in that: The first side of the screw joint (6) is provided with at least two extensions (62), each of the extensions (62) extending along the axial direction of the threaded hole (61), and the extension (62) is provided with a connecting hole (621) for connecting to the fisheye portion (71), and the connecting hole (621) and the fisheye portion (71) are coaxially arranged and connected via a fastener (9).

8. The tensile fatigue testing device according to claim 7, characterized in that: The moving assembly (8) includes a servo motor arranged on a support frame (11), and a telescopic rod (81) connected to the servo motor, wherein the telescopic rod (81) is connected to a side of the fisheye joint (7) away from the fisheye portion (71), and the servo motor is used to drive the telescopic rod (81) to move back and forth so as to be able to test the test piece (4); It also includes a guide member, the guide member is arranged in a mounting hole of the telescopic rod (81) passing through the support frame (11); or the guide member is arranged on the support arm of the support frame (11) along the moving direction of the telescopic rod (81); It also includes a limiting member, which is arranged on the support frame (11) and is used to limit the movement range of the telescopic rod (81).

9. The tensile fatigue testing device according to any one of claims 1 to 8, characterized in that: It also includes a support frame (11), and a medium chamber (5) detachably arranged on the support frame (11), wherein the medium chamber (5) is used to be provided with a medium liquid capable of immersing the test piece (4); The medium compartment (5) can be opened and closed so as to enable the test piece (4) to be moved into or out of the medium compartment (5); The medium bin (5) is a transparent bin, and is provided with at least a water outlet (51) and a water inlet.

10. A testing method, characterized in that: Applied to the tensile fatigue testing device according to any one of claims 1 to 9, the testing method comprises: When the first fixing member (1), the second fixing member (2) and the locking assembly (3) fix the test piece (4), and the second fixing member (2) is connected to the moving assembly (8), the operation of the moving assembly (8) is controlled based on a preset stretching speed, a preset stretching length, and a preset number of stretching times; Based on a detection component corresponding to the piece to be tested (4), the real-time displacement of the piece to be tested (4) is obtained and displayed on a display device.

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