Composite fatigue load clamp

Abstract

The utility model relates to the technical field of clamp devices, in particular to a composite fatigue load clamp which comprises two clamping assemblies, and each clamping assembly comprises a clamping head and two clamping plates. The clamping plates are provided with embedding grooves, the two clamping plates are detachably connected, the clamping head is detachably connected with the two clamping plates, and the problems that in the prior art, the clamping head needs to be installed repeatedly in the test piece clamping process of a plurality of composite fatigue load clamps, so that the fatigue test error is large, and the whole clamp is inconvenient to carry manually are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamp devices, in particular to a composite fatigue load clamp. Background Art

[0002] The composite fatigue load fixture can clamp the specimen, allowing the specimen to undergo composite fatigue load tests with multiple angles. Many existing composite fatigue load fixtures have some shortcomings: 1. The specimen usually needs to be connected to the composite fatigue load fixture with bolts, and then the upper and lower chucks are installed before the entire composite fatigue load fixture is moved to the testing machine and clamped. However, after the specimen is assembled, the entire composite fatigue load fixture is relatively heavy and inconvenient to carry manually. The entire composite fatigue load fixture can only be hoisted onto the testing machine for installation. 2. During fatigue testing, the centering of the specimen has a significant impact on the results of subsequent tests. Overall hoisting will cause deviations in the position of each chuck installation, and it cannot be guaranteed that the position of the chuck will be the same for each test, resulting in specimen installation errors and affecting the results of the fatigue test. 3. The specimen and the fixture are connected by bolts. If a small specimen is connected, 8 bolts are usually required, but if a large specimen is connected, 16 bolts are usually required. This requires very high precision in the processing of the fixture and the specimen. If one hole in the fixture and the specimen does not align, other holes may also not align, resulting in failure of the specimen installation. 4. The bolts used in the bolt connection between the specimen and the fixture bear shear fatigue loads during the test. Long-term fatigue testing can easily damage the bolts. Once a bolt is damaged, it will cause a chain reaction, which may make the test impossible to carry out. It may also cause the fixture hole to be squeezed and damaged, resulting in damage to the fixture. Therefore, general composite fatigue load fixtures cannot be used for long-term fatigue testing, especially fatigue tests under large stress amplitudes. They have limitations. Utility Model Content

[0003] In order to solve the technical problem that many composite fatigue load fixtures are inconvenient to carry out manual handling after the test piece is assembled, the utility model provides a composite fatigue load fixture.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The composite fatigue load fixture comprises two clamping components, wherein the clamping components comprise a clamping head and two clamping plates; the clamping plates are provided with embedding grooves, the two clamping plates are detachably connected, and the clamping head is detachably connected to the two clamping plates.

[0006] Furthermore, it also includes auxiliary bolts and auxiliary nuts. Auxiliary holes are opened on the clamping plates. The auxiliary bolts pass through the auxiliary holes of the two clamping plates and are threadedly connected to the auxiliary nuts.

[0007] Furthermore, the number of the auxiliary holes on the clamping plate is two, and the two auxiliary holes are respectively arranged at both side ends of the embedding groove.

[0008] Furthermore, it also includes shear bolts and mounting nuts. The clamp is provided with a mounting hole, the chuck is provided with a connecting hole, the clamp is slidably connected to the chuck, the shear bolt passes through the connecting hole and the mounting holes of the two clamps, and is threadedly connected to the mounting nut.

[0009] Furthermore, there are multiple mounting holes on the clamping plate, and the multiple mounting holes are arranged in an arc shape.

[0010] Beneficial effects of the utility model:

[0011] 1. The utility model adopts two clamping assemblies to realize the transportation of four splints to the testing machine in three times, avoiding the direct transportation of the entire composite fatigue load fixture to the testing machine, facilitating manual transportation, and solving the problem of inconvenience in manual transportation of many composite fatigue load fixtures after the specimen is assembled. During the entire process of the specimen being installed on the testing machine, the two chucks are always fixed on the testing machine and remain motionless, ensuring that the specimen and the two chucks are uniformly aligned in all tests, and the test accuracy is high;

[0012] 2. The utility model adopts an embedded groove and two auxiliary bolts to facilitate the clamping and installation of the test piece, and will not cause the problem of unsuccessful connection due to the accuracy of the test piece drilling. The test piece itself does not need to be drilled, which also saves costs;

[0013] 3. The utility model adopts two large-diameter shear bolts to meet the test requirements of the entire fatigue life and will not be easily damaged, ensuring that the test can run for a long time and meeting the requirements of long-term fatigue life testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the composite fatigue load fixture in the present utility model;

[0015] Figure 2 for Figure 1 sectional view of

[0016] Figure 3 for Figure 2 Schematic diagram of the structure of the middle splint;

[0017] Figure 4 for Figure 1 Cross-sectional view of the chuck;

[0018] Among them, 1-splint, 2-auxiliary bolt, 3-mounting hole, 4-clamp, 5-shear bolt, 6-test piece, 7-auxiliary hole, 8-embedded slot, 9-mounting nut. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0020] Example:

[0021] The specific implementation process of the utility model: composite fatigue load fixture, such as Figures 1-4 As shown, it includes two clamping components, which include a clamping head 4 and two clamping plates 1; an embedding groove 8 is provided on the clamping plate 1, and the two clamping plates 1 are detachably connected, and the clamping head 4 is detachably connected to the two clamping plates 1.

[0022] The two chucks 4 are directly clamped and fixed on the testing machine. When the specimen 6 is to be clamped, the bottom end of the specimen 6 is first embedded in the embedding groove 8 of the two clamping plates 1 of a clamping assembly, and then the two clamping plates 1 are connected together. The two clamping plates 1 that clamp the specimen 6 are then transported to the testing machine and connected to the chuck 4 below. Then the two clamping plates 1 of the other clamping assembly are transported to the testing machine, and the top end of the specimen 6 is embedded in the embedding groove 8 of the two clamping plates 1 of the other clamping assembly. Then the two clamping plates 1 of the other clamping assembly are connected. Finally, the two clamping plates 1 of the other clamping assembly are connected to the chuck 4 above by raising and lowering the height of the chuck 4.

[0023] like Figure 1-Figure 3 As shown, it also includes an auxiliary bolt 2 and an auxiliary nut. An auxiliary hole 7 is opened on the clamping plate 1. The auxiliary bolt 2 passes through the auxiliary holes 7 of the two clamping plates 1 and is threadedly connected to the auxiliary nut.

[0024] When two clamping plates 1 are to be connected, the auxiliary bolt 2 is first passed through the auxiliary holes 7 of the two clamping plates 1 , and then the auxiliary nut is screwed onto the auxiliary bolt 2 .

[0025] like Figure 1-Figure 3 As shown, there are two auxiliary holes 7 on the clamping plate 1 , and the two auxiliary holes 7 are respectively arranged at both side ends of the embedding groove 8 .

[0026] The two auxiliary holes 7 can facilitate the formation of two auxiliary bolt 2 connections of the clamping plate 1 , so that the test piece 6 can be restricted in the embedding groove 8 .

[0027] like Figures 1-4 As shown, it also includes a shear bolt 5 and a mounting nut 9. A mounting hole 3 is opened on the clamp 1, and a connecting hole is opened on the clamp 4. The clamp 1 is slidably connected to the clamp 4. The shear bolt 5 passes through the connecting hole and the mounting holes 3 of the two clamps 1, and is threadedly connected to the mounting nut 9.

[0028] A clamping groove is provided on the clamping head 4. When the clamping head 4 and the two clamping plates 1 are to be connected, the two clamping plates 1 are first placed in the clamping groove, and then the shear bolt 5 is passed through the connecting hole and the mounting hole 3 on the two clamping plates 1, and then the mounting nut 9 is screwed onto the shear bolt 5. The model of the shear bolt 5 can be M20.

[0029] like Figure 1-Figure 3 As shown, there are multiple mounting holes 3 on the clamping plate 1, and the multiple mounting holes 3 are arranged in an arc shape.

[0030] The chuck 4 can be adjusted relative to the clamp 1 by passing the shear bolts 5 through different mounting holes 3 on the clamp 1, thereby adjusting the position of the specimen 6 after being clamped to achieve composite fatigue loading at different angles.

[0031] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion fall within the protection scope of the present invention.

Claims

1. Composite fatigue load fixture, characterized by: The invention comprises two clamping assemblies, wherein the clamping assemblies include a clamping head and two clamping plates; The clamping plates are provided with an embedding groove, the two clamping plates are detachably connected, and the clamping head is detachably connected to the two clamping plates; It also includes auxiliary bolts and auxiliary nuts. Auxiliary holes are opened on the clamping plates. The auxiliary bolts pass through the auxiliary holes of the two clamping plates and are threadedly connected to the auxiliary nuts.

2. The composite fatigue loading fixture according to claim 1, characterized in that: The number of the auxiliary holes on the clamping plate is two, and the two auxiliary holes are respectively arranged at two side ends of the embedding groove.

3. The composite fatigue loading fixture according to claim 1, characterized in that: It also includes a shear bolt and a mounting nut. The clamp is provided with a mounting hole, the clamp is provided with a connecting hole, the clamp is slidably connected to the clamp, the shear bolt passes through the connecting hole and the mounting holes of the two clamps, and is threadedly connected to the mounting nut.

4. The composite fatigue loading fixture according to claim 3, characterized in that: There are multiple mounting holes on the clamping plate, and the multiple mounting holes are arranged in an arc shape.

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