Local thermal buckling experiment clamp

Abstract

The invention discloses a local thermal buckling experiment clamp, and relates to the technical field of metal plate performance testing, the local thermal buckling experiment clamp comprises a first frame and a second frame, the first frame and the second frame are detachably connected to form a mounting space, and a transverse adjusting plate and a longitudinal adjusting plate are arranged in the mounting space; bolt holes are formed in the two side walls, perpendicular to each other, of the installation space, a first adjusting bolt is arranged in the longitudinal side wall, and the end of the first adjusting bolt abuts against the transverse adjusting plate. A second adjusting bolt is arranged in the transverse side wall, and the end of the second adjusting bolt abuts against the longitudinal adjusting plate. Through the arrangement, the first frame and the second frame are connected, the experimental steel plate is placed in the formed mounting space, the overall convenience of the clamp is improved, the pressure state of the adjusting plate on the experimental steel plate can be stably controlled by adjusting the feeding amount of the first adjusting bolt and the second adjusting bolt, and the experimental steel plate can be stably adjusted. And the buckling deformation data of the steel plate is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of metal plate performance testing, and in particular to a local thermal buckling test fixture. Background Art

[0002] Fatigue fracture of metal components has caused many devastating air crashes in history due to its hidden, sudden and defect-sensitive characteristics. It is one of the most important failure research topics in the aviation industry. The design concept based on fatigue / durability is the most mainstream design method in the current design and strength verification of aircraft, and is also an important basis for the next generation of damage tolerance design and analysis. Aircraft engines face high temperature, high pressure, high speed, high load and other environmental conditions during their service. Therefore, the high temperature low cycle fatigue performance of engine materials is one of the most critical performance parameters in engine design.

[0003] In the past, high-temperature low-cycle fatigue tests on engine materials were mainly carried out between 350℃ and 650℃. With the demand for the development of the next generation of high thrust-to-weight ratio aircraft engines, engine materials need to be used at higher temperatures and loads. Therefore, measuring high-temperature low-cycle fatigue performance data at higher temperatures (usually 750℃ to 1100℃) is the basis for the safe design and manufacturing of the next generation of engines. In the prior art, for high-temperature low-cycle fatigue tests on plates above 750℃, pin loading and tongue-and-groove structure fixtures are usually used to load the plates. However, pins are not suitable for situations where compressive stress exists; tongue-and-groove structure fixtures cannot effectively eliminate gaps, resulting in inaccurate test results, and repeated impact and friction during the test can easily lead to fracture of the clamping section.

[0004] To this end, the present invention provides a local thermal buckling test fixture. Summary of the invention

[0005] The purpose of the present invention is to solve the defects in the prior art and to propose a local thermal buckling test fixture.

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

[0007] A local thermal buckling test fixture comprises a first frame and a second frame, wherein the first frame is detachably connected to the second frame to form an installation space, wherein a transverse adjustment plate and a longitudinal adjustment plate are arranged in the installation space, bolt holes are provided on two side walls perpendicular to each other of the installation space, a first adjustment bolt is arranged in the longitudinal side wall, and an end of the first adjustment bolt abuts against the transverse adjustment plate; a second adjustment bolt is arranged in the transverse side wall, and an end of the second adjustment bolt abuts against the longitudinal adjustment plate.

[0008] Furthermore, the first frame includes a first horizontal section, a first vertical section and a first connecting section which are arranged in sequence, the first horizontal section is provided with a plurality of through holes, and the first connecting section is provided with a threaded hole;

[0009] The second frame comprises a second horizontal section, a second vertical section and a second connecting section which are arranged in sequence, the second horizontal section is provided with a plurality of through holes, and the second connecting section is provided with a threaded hole;

[0010] The first connecting bolt is connected to the threaded hole of the second connecting section through the through hole of the first horizontal section, and the second connecting bolt is connected to the threaded hole of the first connecting section through the through hole of the second horizontal section.

[0011] Furthermore, the bolt holes are arranged on the second horizontal section and the second vertical section.

[0012] Furthermore, the bolt holes on the longitudinal side wall are provided with 3-4 groups, and the first adjusting bolts penetrate the bolt holes and are embedded in the circular grooves on the transverse adjusting plate;

[0013] The bolt holes on the transverse side wall are provided with 3-4 groups, and the second adjusting bolts penetrate the bolt holes and are embedded in the circular groove on the longitudinal adjusting plate.

[0014] Furthermore, the transverse adjustment plate is a plate structure arranged in two parts, and the two layers of the plate are connected by bolts; the longitudinal adjustment plate is a plate structure arranged in two parts, and the two layers of the plate are connected by bolts; and the first frame and / or the second frame are provided with positioning grooves adapted to the steel plate.

[0015] Furthermore, first grooves are formed on two opposite end surfaces of the first frame, and cooling pipes are arranged in the first grooves; second grooves are formed on two opposite end surfaces of the second frame, and cooling pipes are arranged in the second grooves.

[0016] Beneficial Effects

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Through the arrangement of the present invention, the first frame and the second frame are connected, and the experimental steel plate is placed in the formed installation space, thereby improving the convenience of the overall fixture. By adjusting the feed amount of the first adjusting bolt and the second adjusting bolt, the pressure state of the adjusting plate on the experimental steel plate can be stably controlled to obtain the buckling deformation data of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] Figure 1 Schematic diagram of the overall structure of the local thermal buckling test fixture.

[0021] In the figure: 1. first connecting section; 2. first frame; 3. cooling pipe; 4. transverse adjustment plate; 5. longitudinal adjustment plate; 6. first adjusting bolt; 7. second frame; 8. second adjusting bolt; 9. steel plate; 10. second connecting section. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In addition, in the description of this application, the terms used should be understood in a broad sense, and for those skilled in the art, the specific meanings of the terms can be understood according to the actual specific circumstances. For example, the term "installation" used in this application can be defined as a detachable fixed installation or a non-detachable fixed installation, etc.; the terms "setting" and "provided with" used can be defined as a contact setting or a non-contact setting, etc.; the terms "connection" and "connected" used can be defined as a fixed connection or a movable connection, etc.; the term "matching" used can be defined as the same or similar in shape or size, etc.; the directional terms used are all based on the drawings as a reference or the directions defined according to the actual situation and common knowledge.

[0027] Reference Figure 1 A local thermal buckling test fixture comprises a first frame 2 and a second frame 7. The first frame 2 and the second frame 7 are detachably connected to form an installation space. A transverse adjustment plate 4 and a longitudinal adjustment plate 5 are arranged in the installation space. Bolt holes are provided on two side walls perpendicular to each other of the installation space. A first adjustment bolt 6 is arranged in the longitudinal side wall, and the end of the first adjustment bolt 6 abuts against the transverse adjustment plate 4; a second adjustment bolt 8 is arranged in the transverse side wall, and the end of the second adjustment bolt 8 abuts against the longitudinal adjustment plate 5.

[0028] When in use, the first frame 2 and the second frame 7 are connected, and the experimental steel plate 9 is placed in the formed installation space. By adjusting the feed amount of the first adjusting bolt 6 and the second adjusting bolt 8, the pressure state of the adjusting plate on the experimental steel plate is controlled to obtain the buckling deformation data of the steel plate.

[0029] In other preferred embodiments, the first frame 2 includes a first horizontal section, a first vertical section and a first connecting section 1 which are arranged in sequence, the first horizontal section is provided with a plurality of through holes, and the first connecting section 1 is provided with a threaded hole;

[0030] The second frame 7 includes a second horizontal section, a second vertical section, and a second connecting section 10 which are arranged in sequence. The second horizontal section is provided with a plurality of through holes, and the second connecting section 10 is provided with a threaded hole.

[0031] The first connecting bolt is connected to the threaded hole of the second connecting section 10 through the through hole of the first horizontal section, and the second connecting bolt is connected to the threaded hole of the first connecting section 1 through the through hole of the second horizontal section.

[0032] The first frame 2 and the second frame 7 are similar in overall structural form and are arranged in a centrally symmetrical structure. The horizontal sections, vertical sections and connecting sections in the two frames are vertical in sequence. During installation, the first connecting section 1 is abutted against the second horizontal section, and the second connecting section 10 is abutted against the first horizontal section, and they are connected by connecting bolts to form a rectangular installation space. By arranging multiple through holes in each horizontal section, the size of the installation space can be adjusted to adapt to steel plates of different sizes.

[0033] The bolt holes are arranged on the second horizontal section and the second vertical section. The second frame 7 is used as a carrier for installing the transverse adjustment plate 4 and the longitudinal adjustment plate 5 .

[0034] In other preferred embodiments, 3-4 groups of bolt holes are provided on the longitudinal side wall, and the first adjustment bolt 6 passes through the bolt hole and is embedded in the circular groove on the transverse adjustment plate 4;

[0035] There are 3-4 groups of bolt holes on the horizontal side wall, and the second adjusting bolt 8 passes through the bolt hole and is embedded in the circular groove on the longitudinal adjusting plate 5. By providing multiple groups of bolt holes, a stable supporting effect can be provided for the adjusting plate.

[0036] In other preferred embodiments, the transverse adjustment plate 4 is a two-part plate structure, and the two layers of the plate are connected by bolts; the longitudinal adjustment plate 5 is a two-part plate structure, and the two layers of the plate are connected by bolts; the first frame 2 and / or the second frame 7 are provided with positioning grooves adapted to the steel plate. By setting the adjustment plate as a split structure, it is convenient to clamp the test steel plate, and the edges of the test steel plate are limited by the provided positioning grooves.

[0037] In other preferred embodiments, first grooves are provided on opposite end faces of the first frame 2, and cooling pipes 3 are provided in the first grooves; second grooves are provided on opposite end faces of the second frame 7, and cooling pipes 3 are provided in the second grooves. The cooling pipes 3 can be used to cool the frame to ensure that the installation system is not affected by the high temperature environment, reduce its own thermal deformation, and strengthen the boundary constraints on the test steel plate 9.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A local thermal buckling test fixture, characterized in that: It includes a first frame and a second frame, the first frame and the second frame are detachably connected to form an installation space, a transverse adjustment plate and a longitudinal adjustment plate are arranged in the installation space, bolt holes are provided on two side walls perpendicular to each other of the installation space, a first adjustment bolt is arranged in the longitudinal side wall, and the end of the first adjustment bolt abuts against the transverse adjustment plate; a second adjustment bolt is arranged in the transverse side wall, and the end of the second adjustment bolt abuts against the longitudinal adjustment plate.

2. A local thermal buckling test fixture according to claim 1, characterized in that: The first frame includes a first horizontal section, a first vertical section and a first connecting section which are arranged in sequence, the first horizontal section is provided with a plurality of through holes, and the first connecting section is provided with a threaded hole; The second frame comprises a second horizontal section, a second vertical section and a second connecting section which are arranged in sequence, the second horizontal section is provided with a plurality of groups of through holes, and the second connecting section is provided with a threaded hole; The first connecting bolt is connected to the threaded hole of the second connecting section through the through hole of the first horizontal section, and the second connecting bolt is connected to the threaded hole of the first connecting section through the through hole of the second horizontal section.

3. A local thermal buckling test fixture according to claim 2, characterized in that: The bolt holes are arranged on the second horizontal section and the second vertical section.

4. A local thermal buckling test fixture according to claim 1, characterized in that: The bolt holes on the longitudinal side wall are provided with 3-4 groups, and the first adjusting bolts penetrate the bolt holes and are embedded in the circular grooves on the transverse adjusting plate; The bolt holes on the horizontal side wall are provided with 3-4 groups, and the second adjusting bolts penetrate the bolt holes and are embedded in the circular groove on the longitudinal adjusting plate.

5. A local thermal buckling test fixture according to claim 1, characterized in that: The transverse adjustment plate is a two-part plate structure, and the two layers of the plate are connected by bolts; the longitudinal adjustment plate is a two-part plate structure, and the two layers of the plate are connected by bolts; the first frame and / or the second frame are provided with positioning grooves adapted to the steel plate.

6. A local thermal buckling test fixture according to claim 1, characterized in that: The first frame has two opposite end surfaces with first grooves, in which cooling pipes are arranged; the second frame has two opposite end surfaces with second grooves, in which cooling pipes are arranged.

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