Clamp device of K-shaped connector and operation method

Abstract

The invention provides a clamp device of a K-type connector and an operation method, and is applied to the field of mechanical property tests.The clamp device comprises a horizontal loading unit and a vertical loading unit, the horizontal loading unit comprises a horizontally-placed bearing table and a supporting column fixedly connected to the lower portion of the bearing table, and the vertical loading unit comprises a vertical loading unit; the bearing table is used for fixing a K-type joint to be tested; the vertical loading unit comprises a T-shaped load applying mechanism, a transverse clamping part of the T-shaped load applying mechanism is provided with a V-shaped groove used for containing the K-shaped connector, a positioning ejector rod is arranged in a longitudinal connecting part of the T-shaped load applying mechanism, and a hemispherical pressing head is fixed to the end of the positioning ejector rod. The hemispherical pressure head can move up and down in the V-shaped groove; the size of a groove opening of the V-shaped groove of the transverse clamping part can be adjusted through a bolt. The clamp device is used for solving the problems that an existing clamp device is insufficient in stability and poor in universality, and has the advantages of being high in universality, easy and convenient to install and wide in adaptability.

Description

Technical Field

[0001] The invention relates to the field of mechanical property testing, and in particular to a clamp device and an operating method for a K-type joint. Background Art

[0002] In order to study the fatigue performance of key nodes of special-shaped structures of large equipment under complex load conditions, it is necessary to deeply analyze the mechanical properties of complex structures under various load conditions. Among them, ensuring the firm clamping of the specimen and the precise test method are key factors. Therefore, it is very important to develop a test device with high adaptability, reliability and accuracy, and it can provide strong support for the performance research and fatigue design of large equipment to ensure its safe and stable operation.

[0003] In the field of mechanical property testing of welded structures, K-type welded joints are a widely used joint form. However, the prior art lacks a fixture device specifically designed for K-type joints, which makes it difficult to obtain accurate experimental data during actual testing. Traditional fixture systems often lack stability when fixing K-type joints, which can easily cause problems such as specimen sliding or inaccurate positioning. In addition, existing fixtures have poor versatility and are difficult to adapt to different types of joint tests, which limits their scope of application. Therefore, it is particularly important to develop a fixture device specifically for K-type welded joints to improve the accuracy and reliability of mechanical testing. Summary of the invention

[0004] The object of the present invention is to provide a clamp device and an operating method for a K-type joint, so as to improve the problems of insufficient stability and poor versatility of the existing clamp device.

[0005] In a first aspect, an embodiment of the present invention provides a K-type joint clamp device, comprising a horizontal loading unit and a vertical loading unit, wherein:

[0006] The horizontal loading unit includes a horizontally placed bearing platform and a support column fixedly connected to the bottom of the bearing platform, wherein the bearing platform is used to fix the K-type joint to be tested;

[0007] The vertical loading unit is a T-type load applying mechanism, the transverse clamping portion of the T-type load applying mechanism is provided with a V-shaped groove for accommodating the K-type joint, and a positioning push rod is provided in the longitudinal connecting portion of the T-type load applying mechanism, and a hemispherical pressure head is fixed to the end of the positioning push rod, and the hemispherical pressure head can move up and down in the V-shaped groove; the notch size of the V-shaped groove of the transverse clamping portion can be adjusted by a bolt.

[0008] In a possible embodiment, the at least two triangular reinforcement plates are respectively arranged on the sides of the support column, and two sides of the triangular reinforcement plates are respectively welded to the outside of the bearing platform and the support column.

[0009] In another possible embodiment, the bearing platform, the support column and the T-shaped load applying mechanism are high-strength steel plates.

[0010] In a possible embodiment, the load of the transverse clamping portion acts on the V-shaped surface of the K-type joint, and the pressure head is driven hydraulically or electrically to tighten the K-type joint and prevent the K-type joint from concentrating stress inward during tension or compression to balance the stress.

[0011] In other possible embodiments, the fixture device is provided with a standardized interface, and the standardized interface is used to connect with loading systems of various universal testing machines.

[0012] In a possible embodiment, the pressure head has a built-in pressure sensor for detecting the pressure during the stretching or compression process to control the test accuracy of the stress during the stretching or compression process.

[0013] In another possible embodiment, a strain gauge is installed on the V-shaped surface of the K-shaped joint to detect the pressure strain condition of the outer surface of the V-shaped surface of the K-shaped joint during the stretching or compression process.

[0014] In a second aspect, an embodiment of the present invention provides an operating method of a clamp device for a K-type connector, comprising:

[0015] After the positioning push rod is raised to a set position, the K-type joint is accommodated in the V-shaped groove of the clamp device;

[0016] After powering on and starting the program, move the positioning push rod toward the K-type joint until the hemispherical pressing head presses against the K-type joint;

[0017] After starting the program, the universal machine starts to stretch or compress until the K-type joint breaks or fails, and then stops running the program;

[0018] After the positioning push rod is returned to the set position, the power is turned off; the bolts are manually removed to retrieve the K-type joint.

[0019] In a possible embodiment, the detection result of the pressure sensor in the hemispherical pressure head is obtained in real time; when the change of the detection result exceeds a set value, the locking program is started to interrupt the stretching or compression.

[0020] In another possible embodiment, after the K-type joint is accommodated in the V-shaped groove of the clamp device, the method further includes: adjusting the clamping force of the transverse clamping portion on the K-type joint by adjusting a bolt.

[0021] The clamp device and operation method of the K-type joint provided by the present invention have the following beneficial effects:

[0022] 1. Enhanced stability: Through the combination of horizontal loading unit and vertical loading unit, as well as the setting of triangular reinforcement plate, the overall stability of the fixture device is significantly improved, effectively preventing the device from being deformed or displaced due to external force during the stretching or compression process.

[0023] 2. Improved versatility: The design of the standardized interface enables the fixture to be connected to the loading systems of various universal testing machines, thereby improving the applicability and versatility of the fixture.

[0024] 3. Improved accuracy: The use of built-in pressure sensors and strain gauges enables real-time monitoring of pressure and pressure strain during tension or compression, thereby improving the accuracy and reliability of the test.

[0025] 4. Ease of operation: The movement and locking of the positioning ejector rod are controlled by program, which simplifies the operation process, reduces manual intervention, and improves the convenience and efficiency of operation.

[0026] 5. Enhanced safety: Real-time monitoring of pressure changes and initiation of the locking procedure when the set value is exceeded can effectively prevent equipment damage or safety accidents caused by excessive external force, thereby improving the safety of operation.

[0027] 6. Adjustable clamping force: By adjusting the bolt, the clamping force of the lateral clamping part on the K-type joint can be flexibly adjusted to adapt to K-type joints of different sizes and shapes, thereby improving the adaptability and flexibility of the clamp device.

[0028] In summary, the K-type joint clamp device and operation method thereof of the present invention not only improve the stability and accuracy of the test, but also enhance the versatility, ease of operation and safety of the device, while providing a flexible clamping force adjustment function, and have significant technical advantages and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a fixture device for testing a K-type fixture provided in an embodiment of the present invention;

[0031] Figure 2 A partial enlarged schematic diagram of a clamp device of a K-type clamp provided in an embodiment of the present invention Figure 1 ;

[0032] Figure 3 A partial enlarged schematic diagram of a clamp device of a K-type clamp provided in an embodiment of the present invention Figure 2 ;

[0033] Figure 4 A schematic flow chart of an operating method of a clamp device provided in an embodiment of the present invention.

[0034] Description of figure markings:

[0035] Horizontal loading unit 10; vertical loading unit 20; K-type joint 30;

[0036] Carrying platform 101; support column 102; triangular reinforcement plate 103;

[0037] Transverse clamping portion 201; longitudinal connecting portion 202; V-shaped groove a; positioning push rod b; hemispherical pressure head c; pressure sensor d; strain gauge e. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a K-type joint clamp device, including a horizontal loading unit 10 and a vertical loading unit 20, wherein:

[0040] The horizontal loading unit 10 includes a horizontally placed carrying platform 101 and a support column 102 fixedly connected to the bottom of the carrying platform. The carrying platform 102 is used to fix the K-type joint 30 to be tested.

[0041] The vertical loading unit 20 is a T-type load applying mechanism, the transverse clamping portion 201 of the T-type load applying mechanism is provided with a V-shaped groove a for accommodating the K-type joint, and a positioning push rod b is provided in the longitudinal connecting portion 202 of the T-type load applying mechanism 201, and a hemispherical pressure head c is fixed at the end of the positioning push rod, and the hemispherical pressure head c can move up and down in the V-shaped groove a; the notch size of the V-shaped groove a of the transverse clamping portion 201 can be adjusted by bolts.

[0042] The support platform 101 and the support column 102 are reinforced by at least two triangular reinforcement plates 103. Figure 1As shown, four triangular reinforcement plates 103 are respectively arranged around the support column 102, and two sides of each triangular reinforcement plate 103 are respectively welded to the outside of the bearing platform 101 and the support column 102. In this embodiment, the material of the bearing platform, the support column and the T-type load applying mechanism is a high-strength alloy material, for example, all are high-strength steel plates.

[0043] In a possible embodiment, Figure 2 As shown, the load of the transverse clamping portion 201 acts on the V-shaped surface of the K-type joint 30, and the hemispherical pressure head c is driven hydraulically or electrically to tighten the K-type joint 30, while preventing the K-type joint 30 from concentrating stress inward during tension or compression to balance the stress.

[0044] In another possible embodiment, the fixture device may also be provided with a standardized interface (not shown in the figure) for connecting to the loading systems of various universal testing machines.

[0045] In this embodiment, in order to better control the load size of the stretching or compression process, as shown in FIG. Figure 3 As shown, a pressure sensor d may also be built into the hemispherical pressure head c, and the pressure sensor d is used to detect the pressure during the stretching or compression process to control the test accuracy of the stress during the stretching or compression process.

[0046] In another possible embodiment, Figure 3 As shown, the V-shaped surface of the K-shaped joint 30 may also be installed with a strain gauge e for detecting the pressure strain condition of the outer surface of the V-shaped surface of the K-shaped joint during the stretching or compression process.

[0047] Based on the above-mentioned clamp device, the present invention also provides an operation method of the clamp device, such as Figure 4 As shown, the following steps are included:

[0048] S401, after the positioning push rod b is raised to a set position, the K-type joint 30 is accommodated in the V-shaped groove a of the clamp device;

[0049] S402, power on, start the program and move the positioning push rod b toward the K-type joint 30 until the hemispherical pressure head c presses against the K-type joint 30;

[0050] S403, after starting the program, the universal machine starts to stretch or compress until the K-type connector 30 breaks or fails, and then stops running the program;

[0051] S404, return the positioning push rod b to the set position and then turn off the power; manually remove the bolts and retrieve the K-type connector 30.

[0052] In a possible embodiment, the above method further includes: the universal machine acquires and monitors the pressure data detected by the pressure sensor in the hemispherical pressure head c in real time; once it is detected that the change in pressure data exceeds a preset threshold, the universal machine will immediately start a locking program to ensure that the stretching or compression process can be quickly interrupted when the pressure change is too large, thereby protecting the safety of the test sample and equipment.

[0053] In another possible embodiment, the method further includes: firstly placing and fixing the K-type joint 30 in the V-shaped groove a of the clamp device, and then finely adjusting the clamping force applied by the transverse clamping portion 201 to the K-type joint 30 by adjusting the bolts installed on the T-shaped load applying mechanism. In this way, it can be ensured that the K-type joint 30 can be stably fixed when performing a tension or compression test, thereby improving the accuracy and reliability of the test.

[0054] In this embodiment, it is not limited to testing tensile stress, and multiple K-type joints can be installed at the same time to test compressive stress (compression) or shear force, torsion and other mechanical properties through the clamp device.

[0055] The clamp device and operation method of the K-type joint provided by the present invention have the following beneficial effects:

[0056] 1. Enhanced stability: Through the combination of horizontal loading unit and vertical loading unit, as well as the setting of triangular reinforcement plate, the overall stability of the fixture device is significantly improved, effectively preventing the device from being deformed or displaced due to external force during the stretching or compression process.

[0057] 2. Improved versatility: The design of the standardized interface enables the fixture to be connected to the loading systems of various universal testing machines, thereby improving the applicability and versatility of the fixture.

[0058] 3. Improved accuracy: The use of built-in pressure sensors and strain gauges enables real-time monitoring of pressure and pressure strain during tension or compression, thereby improving the accuracy and reliability of the test.

[0059] 4. Ease of operation: The movement and locking of the positioning ejector rod are controlled by program, which simplifies the operation process, reduces manual intervention, and improves the convenience and efficiency of operation.

[0060] 5. Enhanced safety: Real-time monitoring of pressure changes and initiation of the locking procedure when the set value is exceeded can effectively prevent equipment damage or safety accidents caused by excessive external force, thereby improving the safety of operation.

[0061] 6. Adjustable clamping force: By adjusting the bolt, the clamping force of the lateral clamping part on the K-type joint can be flexibly adjusted to adapt to K-type joints of different sizes and shapes, thereby improving the adaptability and flexibility of the clamp device.

[0062] In summary, the K-type joint clamp device and operation method thereof of the present invention not only improve the stability and accuracy of the test, but also enhance the versatility, ease of operation and safety of the device, while providing a flexible clamping force adjustment function, and have significant technical advantages and practical value.

[0063] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0064] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0065] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0066] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A clamp device for a K-type joint, characterized in that: It includes horizontal loading unit and vertical loading unit, where: The horizontal loading unit includes a horizontally placed bearing platform and a support column fixedly connected to the bottom of the bearing platform, wherein the bearing platform is used to fix the K-type joint to be tested; The vertical loading unit is a T-type load applying mechanism, the transverse clamping portion of the T-type load applying mechanism is provided with a V-shaped groove for accommodating the K-type joint, and a positioning push rod is provided in the longitudinal connecting portion of the T-type load applying mechanism, and a hemispherical pressure head is fixed to the end of the positioning push rod, and the hemispherical pressure head can move up and down in the V-shaped groove; the notch size of the V-shaped groove of the transverse clamping portion can be adjusted by a bolt.

2. The clamp device according to claim 1, characterized in that: At least two triangular reinforcement plates are respectively arranged on the sides of the support column, and two sides of the triangular reinforcement plates are respectively welded to the bearing platform and the outside of the support column.

3. The clamp device according to claim 2, characterized in that: The bearing platform, the support column and the T-shaped load applying mechanism are made of high-strength steel plates.

4. The clamp device according to any one of claims 1 to 3, characterized in that: The load of the transverse clamping part acts on the V-shaped surface of the K-type joint, and the pressure head is driven hydraulically or electrically to tighten the K-type joint and prevent the K-type joint from concentrating stress inward during tension or compression to balance the stress.

5. The clamp device according to any one of claims 1 to 3, characterized in that: The fixture device is provided with a standardized interface, and the standardized interface is used to connect with the loading system of various universal testing machines.

6. The clamp device according to any one of claims 1 to 3, characterized in that: The pressure head has a built-in pressure sensor for detecting the pressure during the stretching or compression process to control the test accuracy of the stress during the stretching or compression process.

7. The clamp device according to any one of claims 1 to 3, characterized in that: The V-shaped surface of the K-shaped joint is installed with a strain gauge for detecting the pressure strain condition of the outer surface of the V-shaped surface of the K-shaped joint during the stretching or compression process.

8. An operating method of a clamp device according to any one of claims 1 to 7, characterized in that: After the positioning push rod is raised to a set position, the K-type joint is accommodated in the V-shaped groove of the clamp device; After powering on and starting the program, move the positioning push rod toward the K-type joint until the hemispherical pressing head presses against the K-type joint; After starting the program, the universal machine starts to stretch or compress until the K-type joint breaks or fails, and then stops running the program; After the positioning push rod is returned to the set position, the power is turned off; the bolts are manually removed to retrieve the K-type joint.

9. The method for operating the clamp device according to claim 8, characterized in that: Acquire the detection result of the pressure sensor in the hemispherical pressure head in real time; When the change of the detection result exceeds the set value, the locking program is started to interrupt the stretching or compression.

10. The method for operating the clamp device according to claim 8, characterized in that: After the K-type connector is accommodated in the V-shaped groove of the clamp device, the method further comprises: The clamping force of the transverse clamping portion on the K-type joint is adjusted by adjusting the bolt.

Images