Sample adapter for tensile test

Abstract

The sample adapter for the tensile test comprises an upper part and a lower part, the upper part is a stud, the lower part is a cylinder, and a screw hole or a rectangular opening is formed in the cylinder along the axis of the cylinder. The loading tensile test device is connected with tensile test equipment, so that loading tensile tests can be carried out on bar samples with different specifications and different sizes, and loading tensile tests can also be carried out on plate samples; the structure is simple. The use is convenient, the sample clamping stability is improved, and the accuracy of a tensile test is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tensile testing equipment, and relates to a specimen adapter for tensile testing. Background Technology

[0002] Tensile testing machines are used for mechanical testing and analysis of various metals, non-metals, and composite materials. Their working principle primarily involves a motor-driven hydraulic pump that pressurizes liquid into a hydraulic cylinder, creating a constant hydraulic pressure. The hydraulic cylinder then applies force to the test sample through the test fixture. Based on standards such as JB, JIS, ASTM, DIN, and ISO, the equipment can automatically calculate test data including maximum test force, breaking force, yield strength, tensile strength, compressive strength, elongation at break, tensile modulus of elasticity, and flexural modulus of elasticity.

[0003] With the rapid development of technology in this field, the relevant standards and technical indicators have also been subject to higher requirements. On-site testing not only needs to focus on the performance, accuracy, and stability of the tensile testing machine, but also needs to consider the adaptability of the equipment fixtures. This issue is particularly prominent in actual operation because: 1) Tensile testing machines usually only have one set of fixed fixtures, which limits the size and specifications of the test samples. If the size of the test bar is too small, it cannot be loaded; if the size of the test bar is too large, it will increase costs and make forming more difficult; 2) Tensile testing machines can only perform tensile tests on bar specimens, which is too restrictive on the specifications of the test samples. For example, common sheet metal specimens cannot be tested due to the lack of suitable fixtures. Utility Model Content

[0004] The purpose of this invention is to provide a specimen adapter for tensile testing, which solves the problem that existing fixtures cannot load specimens of different specifications.

[0005] The technical solution adopted in this utility model is a tensile test specimen adapter, which includes two parts: the upper part is a stud and the lower part is a column. The column has a screw hole or a rectangular opening along its axis.

[0006] The features of this utility model also include:

[0007] The upper and lower parts are set coaxially.

[0008] Screw holes include S-type screw holes and B-type screw holes, with the diameter of B-type screw holes being larger than that of S-type screw holes.

[0009] The rectangular opening is equipped with a plate locking mechanism.

[0010] The plate locking mechanism includes a bolt that passes through the column, with a nut at the end of the bolt. The nut is located on the outside of the column, and the bolt axis is perpendicular to the column axis.

[0011] The bolt is located in the middle of the column.

[0012] The bolt has a fastening plane cut into the column where it enters and exits the column. The two fastening planes are set opposite each other on the side surface of the column, and the bolt head and nut are respectively in close contact with the two fastening planes.

[0013] A cylindrical groove is provided on the fastening surface, and a collar is embedded in the cylindrical groove. The collar is fitted onto the bolt thread.

[0014] The beneficial effects of this utility model are:

[0015] This utility model relates to a specimen adapter for tensile testing. Connecting to tensile testing equipment, it not only allows for tensile testing of bar specimens of different specifications and sizes, but also enables tensile testing of sheet metal specimens. It features a simple structure, ease of use, and improved specimen clamping stability, further enhancing the accuracy of tensile testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a specimen adapter for tensile testing according to the present invention.

[0017] Figure 2 This is a schematic diagram of a specimen adapter for tensile testing according to the present invention.

[0018] Figure 3 This is an exploded view of Embodiment 6 of the tensile testing specimen adapter of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of Embodiment 6 of the tensile test specimen adapter of this utility model.

[0020] In the diagram: 1. Stud, 2. Screw hole, 3. Column, 4. Rectangular opening, 5. Collar, 6. Nut, 7. Fastening plane, 8. Bolt, 9. Cylindrical groove. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the following description of this utility model, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0023] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for descriptive purposes only and is not intended to limit the scope of the invention.

[0024] Example 1

[0025] This embodiment provides a specimen adapter for tensile testing, comprising two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment), and the lower part is a column 3, which has a screw hole 2 along its axis.

[0026] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0027] Example 2

[0028] This embodiment provides a specimen adapter for tensile testing, comprising two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment), and the lower part is a column 3, which has a screw hole 2 along its axis.

[0029] Screw hole 2 includes, for example Figure 1 The S-type screw hole shown and as Figure 2 The B-type screw hole shown has a larger diameter than the S-type screw hole. The S-type screw hole is smaller than the standard size, while the B-type screw hole is larger than the standard size.

[0030] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0031] Example 3

[0032] This embodiment provides a specimen adapter for tensile testing, comprising two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment). The lower part is a column 3, which has a rectangular opening 4 along its axis. The size of the rectangular opening 4 is slightly larger than the thickness of the plate specimen being held.

[0033] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0034] Example 4

[0035] This embodiment provides a specimen adapter for tensile testing, comprising two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment). The lower part is a column 3, which has a rectangular opening 4 along its axis. The rectangular opening is equipped with a plate locking mechanism.

[0036] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0037] Example 5

[0038] This embodiment provides a specimen adapter for tensile testing, comprising two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment). The lower part is a column 3, which has a rectangular opening 4 along its axis. The rectangular opening is equipped with a plate locking mechanism.

[0039] The plate locking mechanism includes a bolt 8 that passes through the column 3. The bolt 8 is located in the middle of the column 3. A nut 6 is provided at the end of the bolt 8. The nut 6 is located on the outside of the column, and the axis of the bolt 8 is perpendicular to the axis of the column 3.

[0040] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0041] Example 6

[0042] This embodiment provides a specimen adapter for tensile testing, such as... Figure 3-4It includes two coaxially arranged upper and lower parts. The upper part is a stud 1, which is of standard size (referring to the size to be installed in the tensile testing equipment). The lower part is a column 3, which has a rectangular opening 4 along its axis. The rectangular opening is equipped with a plate locking mechanism.

[0043] The plate locking mechanism includes a bolt 8 that passes through the column 3. The bolt 8 is located in the middle of the column 3. A nut 6 is provided at the end of the bolt 8. The nut 6 is located on the outside of the column, and the axis of the bolt 8 is perpendicular to the axis of the column 3.

[0044] The bolt has fastening planes 7 cut into the column 3 and the column 3. The two fastening planes 7 are set opposite to each other on the side surface of the column 3. The bolt head and nut 6 are respectively close to the two fastening planes 7. The fastening planes have cylindrical grooves 9. The cylindrical grooves 9 are embedded in the cylindrical grooves 9. The depth of the cylindrical grooves 9 and the thickness of the cylindrical grooves 9 are the same, and their radial dimensions are consistent. The cylindrical grooves 9 are fitted on the bolt 8.

[0045] The specific function of fastening plane 7 is as follows:

[0046] 1) By increasing the contact area between bolt 8 and column 3, the force per unit area between them can be reduced;

[0047] 2) Increasing the surface constraint between bolt 8 and column 3 can make the force distribution between bolt 8 and column 3 more uniform and prevent relative displacement between them.

[0048] The combined design of the cylindrical groove 9 and the collar 5 serves the following purposes:

[0049] 1) Improve the stability of the bolt during the tensile test and the good perpendicularity between the bolt and the clamped specimen, thereby ensuring the coaxiality requirement of the specimen during the test.

[0050] 2) Reduce the difficulty of forming the fixture and improve the machining accuracy of the fixture.

[0051] This embodiment represents only a preferred embodiment of the tensile test specimen adapter of this utility model. Any adapter designed with similar technical features to this utility model will fall within the protection scope of the tensile test specimen adapter of this utility model.

[0052] The working principle of this utility model's specimen adapter for tensile testing is as follows:

[0053] If the sample is a small-sized (smaller than standard size) thin bar, it cannot be loaded into the equipment fixture with a standard size R. Therefore, an adapter with two S-type screw holes (2 in total) should be used. Figure 1 As shown, its usage method is as follows:

[0054] 1) First, process both ends of the bar stock into bar studs that meet the screw-in specifications (including the radial dimensions, length, and geometric parameters of the thread) so that the bar stock can be smoothly screwed into the screw hole 2;

[0055] 2) First, screw one end of the bar stock into the S-shaped screw hole of the adapter, and then screw the stud 1 of the adapter into the upper clamp of the tensile testing equipment.

[0056] 3) Continue to screw the lower end of the bar stock into the screw hole 2 of another S-type threaded adapter, and similarly screw the stud 1 of the adapter into the lower clamp of the equipment.

[0057] 4) Inspect and tighten the connections between the bar stock, adapters and equipment to ensure that the connections are correct and secure before conducting tensile tests.

[0058] If the sample is a large-sized (larger than standard size) thick bar, although it can be loaded into a standard-sized (R) equipment fixture after processing, the high processing cost and difficulty bring many disadvantages to the sample processing and forming. Therefore, an adapter with two type B screw holes should be used. Figure 2 As shown, its usage method is as follows:

[0059] 1) First, process both ends of the bar stock into studs that meet the screw-in specifications (including the radial dimensions, length, and geometric parameters of the thread) so that the bar stock can be smoothly screwed into the screw hole 2 of the adapter.

[0060] 2) First, screw one end of the bar stock into the B-type screw hole of the adapter, and then screw the stud 1 of the adapter into the upper clamp of the equipment.

[0061] 3) Continue to screw the lower end of the bar stock into the type B screw hole of another adapter, and similarly screw the stud 1 of the adapter into the lower end clamp of the equipment;

[0062] 4) Check and fasten the connections between the bar stock, adapter and equipment to ensure that the connections are correct and tight before carrying out tensile tests.

[0063] If the sample is a sheet material, an adapter with a rectangular opening of 4 should be used. Figure 3 , Figure 4 As shown, its usage method is as follows:

[0064] 1) Process the sheet material into test specimens of suitable specifications. Make holes at both ends of the sheet material, and the hole diameter should be slightly larger than the radial dimension of the bolt.

[0065] 2) First, screw the stud 1 of the adapter into the upper clamp of the equipment. Then, insert the two collars 5 into the cylindrical grooves 9 on both sides of the column 3 respectively. The collars 5 should be flush with the fastening plane 7 of the column 3. Put the hole end of the plate into the rectangular opening 4 of the column 3 and align it with the hole of the column 3. Then, quickly pass the bolt 8 through the collar 5, the column 3 and the hole of the plate, and manually screw in the bolt nut 6.

[0066] 3) Similarly, screw the stud 1 of the other adapter into the clamp at the lower end of the equipment. Then, insert the two collars 5 into the cylindrical grooves 9 on both sides of the column 3 respectively. The collars 5 should be flush with the fastening plane 7 of the column 3. Let the other opening end of the plate move into the rectangular opening 4 of the column 3 by gravity. Align the column 3 with the hole of the plate. Then, quickly pass the bolt 8 through the collar 5, the column 3 and the hole of the plate, and manually screw in the bolt nut 6.

[0067] 4) Check and tighten. First, ensure that the connection between the sheet metal, adapter and equipment is correct. Then tighten the adapters at the upper and lower ends of the equipment. Next, tighten the nuts 6 of the upper and lower bolts 8. After ensuring that all connections are correct and tight, the tensile test can be carried out.

[0068] The above provides a detailed description of a tensile test specimen adapter provided by this utility model. Specific examples have been used to illustrate the implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A specimen adapter for tensile testing, characterized in that, The device comprises a connected upper and lower half. The upper half is a stud (1), and the lower half is a column (3). The column (3) has a screw hole (2) or a rectangular opening (4) along its axis. The screw hole (2) includes an S-type screw hole and a B-type screw hole, with the B-type screw hole having a larger diameter than the S-type screw hole. The rectangular opening (4) is equipped with a plate locking mechanism. The plate locking mechanism includes a bolt (8) that penetrates the column (3). The end of the bolt (8) is equipped with a nut (6), which is located on the outside of the column. The axis of the bolt (8) is perpendicular to the axis of the column (3). The bolt (8) is located in the middle of the column (3). The bolt (8) has fastening planes (7) cut into the column (3) and the part of the bolt (8) that extends into the column (3) and extends out of the column (3). The two fastening planes (7) are arranged opposite to each other on the side surface of the column (3). The screw head of the bolt (8) and the nut (6) are respectively close to the two fastening planes (7). A cylindrical groove (9) is provided on the fastening plane (7). A collar (5) is embedded in the cylindrical groove (9). The collar (5) is fitted on the screw of the bolt (8).

2. The tensile test specimen adapter according to claim 1, characterized in that, The upper and lower halves are coaxially arranged.

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