Micro sample creep test device

Abstract

The utility model discloses a micro sample creep test device, which relates to the creep test field, and comprises a testing machine, the top of the testing machine is provided with an assembling component, the assembling component comprises two chucks, the middle part of the periphery of each chuck is provided with a convex rib, the two chucks are connected with a leading-out rod of the testing machine through the convex ribs, and the two chucks are connected with the leading-out rod of the testing machine through the convex ribs. A plane groove is formed in the top of the chuck, a groove is formed in the position, close to the top end, of one side of the plane groove, a fixing plate is installed on the outer side of the plane groove, two bolts penetrate through the outer side of the fixing plate and are connected and installed between the chuck and the fixing plate, the interior of the groove is used for clamping clamping blocks, and the two clamping blocks are used for being fixed to the two ends of a test piece; the problem that a small sample cannot be tested in an existing high-temperature lasting creep testing machine is solved, the assembling and deformation measuring mode of the small sample is achieved, the minimum size of the sample is remarkably optimized, and the range of raw materials and devices for material taking and sample preparation is greatly widened.

Description

Technical Field

[0001] The utility model relates to the field of creep testing, in particular to a micro-sample creep testing device. Background Art

[0002] Creep testing is a mechanical property test used to determine whether a material undergoes slow plastic deformation under long-term constant temperature and constant force stress. With the continuous development of aerospace technology, the manufacturing and use requirements for components such as engines are becoming increasingly stringent. Aeroengines operate under very harsh conditions, requiring them to operate under high temperature, high pressure, and high-speed rotation. To improve the performance and reliability of aeroengines, standard specimens are usually preferred for long-term creep performance analysis of materials and components. Therefore, corresponding tooling design is required to meet the test requirements. This solution specifically involves a micro-specimen creep test device.

[0003] Due to shape and size limitations, some equipment cannot meet the requirements for preparing standard-sized specimens and can only produce micro-sized specimens. Or even if the material size can support the sampling of rod-shaped specimens, due to limitations in turning process conditions, there will be a certain degree of material waste, and the material cannot be fully utilized to prepare a sufficient number of specimens. Utility Model Content

[0004] The main purpose of the utility model is to provide a micro-sample creep test device, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A micro-specimen creep test device includes a testing machine, an assembly component is installed on the top of the testing machine, the assembly component includes two chucks, a rib is installed on the outer periphery of the chuck near the middle, the two chucks are connected to the lead-out rod of the testing machine through the ribs, a planar groove is provided on the top of the chuck, a groove is provided on one side of the planar groove near the top, a fixing plate is installed on the outside of the planar groove, and two bolts are installed through the outside of the fixing plate and connected to the chuck.

[0007] As a further solution of the present invention, the interior of the groove is used for clamping a clamping block, and the two clamping blocks are used for fixing at both ends of the test piece.

[0008] As a further solution of the present invention, the two clamps are symmetrically installed, and the side surface of the groove is in an inverted "T" shape.

[0009] As a further solution of the present invention, the fixing plates are arranged on the outside of the plane groove and matched with each other, and the inner end of the bolt passes through the interior of the fixing plate and is threadedly connected with the clamp.

[0010] As a further solution of the present invention, the main viewing surfaces of the test piece and the two clamping blocks are arranged in an "I" shape, and the clamping blocks and the grooves are arranged in a snap-fitting manner.

[0011] As a further solution of the present invention, the top and bottom ends of the two chucks are respectively installed with connecting components, and the connecting components include pull rods, which are respectively installed at the top and bottom ends of the two chucks. Screw holes are provided at the ends of the pull rods, and threaded grooves are provided on the outer periphery of the chucks near the bottom end.

[0012] As a further solution of the present invention, the two pull rods are symmetrically installed, and the two pull rods are respectively used to be installed at the top and bottom ends of the two chucks.

[0013] As a further solution of the present invention, the thread groove and the screw hole are connected by threads.

[0014] The beneficial effects of the utility model are as follows:

[0015] By setting up assembly components to facilitate the transfer of micro specimens, the difficulty of testing small specimens in existing high-temperature creep testing machines was solved. The assembly and deformation measurement methods of tiny specimens were designed and implemented, and a small specimen testing method was developed.

[0016] By setting up a connecting component, the chuck and the pull rod are connected through a threaded groove, which facilitates the fixation of the chuck. Compared with conventional endurance creep test devices, the minimum size of the specimen is significantly optimized. The minimum length of the specimen after processing is reduced from 100mm to 30mm, greatly broadening the range of raw materials and devices that can be used for sample collection and sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a micro-sample creep test device of the utility model;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of the assembly components in a micro-specimen creep test device of the present invention;

[0019] Figure 3 This is a side view of the assembled specimen and chuck in a micro-specimen creep test device of the utility model;

[0020] Figure 4 This is a schematic structural diagram of a test piece in a micro-sample creep test device of the present invention;

[0021] Figure 5 The utility model is a schematic diagram of the disassembled structure of the connection components in a micro-specimen creep test device.

[0022] In the figure: 1. Testing machine; 2. Assembly component; 3. Connection component; 4. Clamp; 5. Flat groove; 6. Groove; 7. Rib; 8. Fixing plate; 9. Bolt; 10. Clamp; 11. Test piece; 12. Threaded groove; 13. Pull rod; 14. Screw hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-5 As shown, a micro-specimen creep test device includes a testing machine 1, an assembly component 2 is installed on the top of the testing machine 1, the assembly component 2 includes two chucks 4, a rib 7 is installed on the outer periphery of the chuck 4 near the middle, the two chucks 4 are connected to the lead-out rod of the testing machine 1 through the rib 7, a plane groove 5 is provided on the top of the chuck 4, a groove 6 is provided on one side of the plane groove 5 near the top, a fixing plate 8 is installed on the outside of the plane groove 5, two bolts 9 are installed through the outside of the fixing plate 8 and connected to the chuck 4, the fixing plate 8 covers the outside of the plane groove 5 in the chuck 4 to prevent the clamping block 10 and the test piece 11 from falling off from the groove 6, and the fixing plate 8 is locked by the bolt 9.

[0025] In this embodiment, the interior of the groove 6 is used to clamp the clamping block 10, and the two clamping blocks 10 are used to be fixed at the two ends of the specimen 11. The two chucks 4 are used to clamp the specimen 11. The clamping blocks 10 at both ends of the specimen 11 are used to be clamped in the groove 6 for assembly. The groove 6 is aligned by adjusting the two chucks 4 to avoid generating a torsional torque on the specimen 11.

[0026] In this embodiment, the two chucks 4 are symmetrically installed, and the side view of the groove 6 is an inverted "T" shape. The clamping block 10 is clamped through the groove 6, and the specimen 11 is pressed against the bottom of the groove to ensure that the axis of the specimen coincides with the direction of the test force loading, which facilitates the assembly and fixation of the specimen 11.

[0027] In this embodiment, the fixing plate 8 is located on the outside of the planar groove 5 and is matched with each other. The inner end of the bolt 9 passes through the interior of the fixing plate 8 and is threadedly connected to the chuck 4. The fixing plate 8 is fixed by the connection of the bolt 9 to prevent the specimen 11 from being affected by shear or torsion during loading.

[0028] In this embodiment, the main viewing surfaces of the specimen 11 and the two clamping blocks 10 are arranged in an "I" shape, and the clamping blocks 10 and the grooves 6 are arranged in a clamping connection. Through the clamping connection between the clamping blocks 10 and the grooves 6, the two clamping blocks 10 of the specimen 11 are fixed, so that the two chucks 4 can perform creep experiments on the specimen 11.

[0029] In this embodiment, the top and bottom ends of the two chucks 4 are respectively installed with connecting components 3, and the connecting components 3 include pull rods 13. The two pull rods 13 are respectively installed at the top and bottom ends of the two chucks 4. The ends of the pull rods 13 are provided with screw holes 14, and the outer periphery of the chuck 4 is provided with threaded grooves 12 near the bottom ends. The two chucks 4 are respectively connected and fixed to the two pull rods 13 through the connection between the threaded grooves 12 and the screw holes 14. The test machine 1 is operated to load to the initial load along the tensile direction, tighten the specimen 11 and eliminate the tiny gaps between the components on the loading chain.

[0030] In this embodiment, the two pull rods 13 are symmetrically installed. The two pull rods 13 are respectively used to be installed at the top and bottom ends of the two chucks 4. The pull rods 13 are used to be fixed to the testing machine 1. Through the connection between the two pull rods 13 and the two chucks 4, the creep test is performed on the specimen 11.

[0031] In this embodiment, the thread groove 12 and the screw hole 14 are threadedly connected, and the chuck 4 is connected to the screw hole 14 through the thread groove 12, thereby connecting the chuck 4 to the end of the pull rod 13 of the testing machine 1, so that the two chucks 4 are fixed.

[0032] It should be noted that the present invention is a micro-sample creep test device. When in use, the threaded groove 12 of the chuck 4 is respectively connected to the ends of the upper and lower pull rods 13 in the high-temperature creep endurance tester 1, so that the grooves 6 in the chuck 4 are aligned with each other, and the tester 1 is operated. The spacing of the chuck 4 is adjusted to a suitable position, and one end of the test piece 11 is placed in the chuck 4 at the upper end, and the clamping block 10 of the test piece 11 is inserted into the groove 6. The test piece 11 is pressed against the bottom of the groove to ensure that the axis of the sample coincides with the direction of the test force loading. The fixing plate 8 covers the outside of the plane groove 5 in the chuck 4 to prevent the clamping block 10 and the test piece 11 from falling off from the groove 6. The fixing plate 8 is locked with a bolt 9. In the same way , connect the other end of the specimen 11 to the chuck 4 at the lower end, and insert the clamp 10 into the groove 6 and fix it through the fixing plate 8. At the same time, adjust the angle of the chuck 4 so that the grooves 6 in the chuck 4 at the upper and lower ends are aligned to avoid generating a torsional moment on the specimen 11. After the assembly is stable, operate the testing machine 1 to load to the initial load in the tensile direction, tighten the specimen 11 and eliminate the tiny gaps between the components on the loading chain. If it is a creep test, a lead-out rod and a grating scale device can be installed on the rib 7 of the chuck 4 to measure the deformation of the specimen during the test. Apply a certain tensile force to the specimen 11 and observe the deformation of the grating scales on both sides. Fine-tune the tooling so that the deformation readings on both sides remain consistent. After the assembly is completed, the test can be started.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A micro-sample creep test device, comprising a testing machine (1), wherein an assembly component (2) is mounted on the top of the testing machine (1), and characterized in that: The assembly component (2) includes two chucks (4), a convex rib (7) is installed on the outer periphery of the chuck (4) near the middle, and the two chucks (4) are connected to the lead-out rod of the testing machine (1) through the convex rib (7), a plane groove (5) is provided on the top of the chuck (4), a groove (6) is provided on one side of the plane groove (5) near the top, and a fixing plate (8) is installed on the outer side of the plane groove (5), and two bolts (9) are installed through the outer side of the fixing plate (8) and connected to the chuck (4).

2. A micro-specimen creep test device according to claim 1, characterized in that: The interior of the groove (6) is used to clamp the clamping blocks (10), and the two clamping blocks (10) are used to be fixed at both ends of the test piece (11).

3. A micro-specimen creep test device according to claim 1, characterized in that: The two clamps (4) are symmetrically installed, and the side view of the groove (6) is in an inverted "T" shape.

4. A micro-specimen creep test device according to claim 1, characterized in that: The fixing plates (8) are located outside the plane groove (5) and are matched with each other. The inner end of the bolt (9) passes through the interior of the fixing plate (8) and is threadedly connected to the clamp (4).

5. The micro-specimen creep test device according to claim 2, characterized in that: The main viewing surfaces of the test piece (11) and the two clamping blocks (10) are arranged in an "I" shape, and the clamping blocks (10) and the grooves (6) are arranged in a snap-fitting manner.

6. A micro-specimen creep testing device according to claim 1, characterized in that: The top and bottom ends of the two chucks (4) are respectively installed with connecting assemblies (3), and the connecting assemblies (3) include pull rods (13). The two pull rods (13) are respectively installed at the top and bottom ends of the two chucks (4), and screw holes (14) are provided at the ends of the pull rods (13). The outer periphery of the chuck (4) is provided with a threaded groove (12) near the bottom end.

7. A micro-specimen creep testing device according to claim 6, characterized in that: The two pull rods (13) are symmetrically installed, and the two pull rods (13) are respectively used to be installed at the top and bottom ends of the two clamps (4).

8. The micro-specimen creep test device according to claim 6, characterized in that: The thread groove (12) and the screw hole (14) are threadedly connected.

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