Clamp for testing riveting strength of rivet
By designing a rivet rivet Strength Test Fixture including tensile blocks and riveted blocks, the problem of difficulty in accurately evaluating the rivet connection strength in the prior art is solved, and more accurate and reliable detection results are achieved, providing more reliable connection strength guarantees for automotive assembly.
Patent Information
- Application Number
- CN202421712790.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The prior art is difficult to accurately evaluate the connection strength after rivets, which is mainly due to the structural characteristics of the rivets that cannot pass the tensile performance detection, and there are limitations in the detection method based on hardness as an indicator.
A clamp including a relatively arranged first and second stretching blocks, and a clamp for riveting and fixing the first and second rivet blocks at both ends of the rivet to be tested is designed, firmly clamping is achieved through threaded connections, and stable fixation of the rivets is ensured through threaded holes and cavity structures.
Accurate testing of connection strength after riveting is achieved, the limitations of detection based on hardness are overcome, the accuracy and reliability of the inspection results are improved, and the connection strength during automobile assembly is provided with a more reliable guarantee.
Smart Images
Figure CN223051007U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of jigs, and more specifically, to a jig for testing the riveting strength of rivets. Background Art
[0002] In automobile assembly, in addition to the most common threaded connections, there are also a large number of assembly positions where riveting connections are used due to the thickness constraints of components. For this type of connection, various rivets are required. After riveting with rivets, whether the connection strength at this point is sufficient will directly affect the reliability of the component during service. Therefore, this should be monitored through detection means.
[0003] However, as we all know, rivets generally have a short length and no threads on the rod part. Such structural characteristics directly determine that we cannot evaluate the post-riveting connection strength by measuring the tensile properties of a single rivet. Currently, the most commonly used method is to detect the hardness of the rivet, and if necessary, convert it into tensile strength to estimate the bearing strength of the connection point. This detection method using hardness as an index has certain limitations. The detection result can only reflect the quality of the test surface at that time, and there is a large uncertainty in reflecting the overall performance level.
[0004] In order to accurately obtain the connection strength after riveting of the rivet, it is very necessary to design a detection jig that is convenient to use and firmly clamped. Summary of the Utility Model
[0005] The purpose of the utility model is to solve the defects in the prior art and provide a jig for testing the riveting strength of rivets that is convenient to use, firmly clamped, and can accurately obtain the connection strength after riveting.
[0006] To solve the above problems, the utility model provides a jig for testing the riveting strength of rivets, which includes a first tensile block and a second tensile block arranged oppositely, and a first riveting block and a second riveting block for riveting and fixing both ends of the rivet to be tested. A first threaded hole is provided on the first tensile block, and the first riveting block is threadedly connected to the first threaded hole. A second threaded hole is provided on the second tensile block, and the second riveting block is threadedly connected to the second threaded hole.
[0007] Compared with the prior art, the beneficial effect of the utility model is that by arranging the first tensile block and the second tensile block oppositely, and respectively threadedly connecting the first riveting block and the second riveting block, the rivet to be tested can be firmly clamped, and the accurate test of the connection strength after riveting can be realized. It overcomes the limitations of the prior art in detecting with hardness as an index, improves the accuracy and reliability of the detection result, and provides a more reliable guarantee for ensuring the connection strength during the automobile assembly process.
[0008] Specifically, a first riveting hole for accommodating one end of the rivet to be tested is formed on the first riveting block, and a second riveting hole for accommodating the other end of the rivet to be tested is formed on the second riveting block. The first riveting hole and the second riveting hole are in communication with each other. After applying this structure, the rivet to be tested can be stably fixed in the fixture, avoiding the deviation of the test results caused by the loosening or falling off of the rivet, and improving the accuracy and reliability of the test.
[0009] As an improvement, a first cavity for accommodating the riveting point at one end of the rivet to be tested is provided on the first stretching block, and the first cavity is in communication with the first threaded hole; a second cavity for accommodating the riveting point at the other end of the rivet to be tested is provided on the second stretching block, and the second cavity is in communication with the second threaded hole. This structure can effectively accommodate the riveting points at both ends of the rivet to be tested. Even if the size of the riveting point is large, it will not affect the fixation of the two riveting blocks and the two stretching blocks, thus improving the stability and reliability of the fixture.
[0010] As an improvement, a ring-shaped first connecting portion is provided on the first stretching block, and the first connecting portion is located at the end far from the first threaded hole; a ring-shaped second connecting portion is provided on the second stretching block, and the second connecting portion is located at the end far from the second threaded hole. This structure can effectively fix the tensile testing machine to the first stretching block and the second stretching block, avoiding the loosening or displacement of the fixture caused by improper fixing method, thus improving the stability of the test process and the accuracy of the test results.
[0011] As an improvement, at least one pair of first disassembly and assembly holes are formed on the first riveting block, and the first disassembly and assembly holes are located on the end face of the adjacent end of the first riveting block and the second riveting block; at least one pair of second disassembly and assembly holes are formed on the second riveting block, and the second disassembly and assembly holes are located on the end face of the adjacent end of the second riveting block and the first riveting block. By applying this structure, after the rivet is stretched and broken, the first riveting block and the second riveting block can be screwed out from the first stretching block and the second stretching block respectively through the first disassembly and assembly holes and the second disassembly and assembly holes, which facilitates the disassembly of the fixture, and also facilitates the cleaning of the remaining rivet fragments, improving the reuse rate of the fixture. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the present utility model in the working state;
[0013] Figure 2 is Figure 1 a sectional view taken along line A-A in
[0014] Figure 3 is the first three-dimensional view of the present utility model;
[0015] Figure 4 is the second three-dimensional view of the present utility model.
[0016] Description of the Reference Numerals:
[0017] 1. First stretching block; 10. First threaded hole; 11. First cavity; 12. First connecting portion; 2. Second stretching block; 20. Second threaded hole; 21. Second cavity; 22. Second connecting portion; 3. First riveting block; 30. First riveting hole; 31. First disassembly hole; 4. Second riveting block; 40. Second riveting hole; 41. Second disassembly hole. DETAILED DESCRIPTION
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0019] like Figure 1 and Figure 2 As shown, in the utility model, the rivet riveting strength test fixture comprises a first stretching block 1 and a second stretching block 2 which are arranged opposite to each other, and a first riveting block 3 and a second riveting block 4 which are used to rivet and fix the two ends of the rivet to be tested. The first stretching block 1 is provided with a first threaded hole 10, and the first riveting block 3 is threadedly connected to the first threaded hole 10. The second stretching block 2 is provided with a second threaded hole 20, and the second riveting block 4 is threadedly connected to the second threaded hole 20.
[0020] The utility model adopts a first stretching block 1 and a second stretching block 2 that are arranged relatively to each other, and respectively connects the first riveting block 3 and the second riveting block 4 through threads, so as to firmly clamp the rivet to be tested, thereby realizing accurate testing of the connection strength after riveting, overcoming the limitation of the prior art of testing with hardness as an indicator, improving the accuracy and reliability of the test result, and providing a more reliable guarantee for ensuring the connection strength in the process of automobile assembly.
[0021] like Figure 2 As shown, the first rivet block 3 is provided with a first rivet hole 30 for accommodating one end of the rivet to be tested, and the second rivet block 4 is provided with a second rivet hole 40 for accommodating the other end of the rivet to be tested, and the first rivet hole 30 and the second rivet hole 40 are connected to each other. After applying this structure, the rivet to be tested can be stably fixed in the fixture, avoiding the deviation of the test result caused by the loosening or falling off of the rivet, and improving the accuracy and reliability of the test.
[0022] like Figure 2 As shown, the first stretching block 1 is provided with a first cavity 11 for accommodating the riveting point at one end of the rivet to be tested, and the first cavity 11 is connected to the first threaded hole 10; the second stretching block 2 is provided with a second cavity 21 for accommodating the riveting point at the other end of the rivet to be tested, and the second cavity 21 is connected to the second threaded hole 20. This structure can effectively accommodate the riveting points at both ends of the rivet to be tested, and even if the riveting points are large in size, it will not affect the fixation of the two riveting blocks and the two stretching blocks, thereby improving the stability and reliability of the clamp.
[0023] As Figure 2 shown, the first stretching block 1 is provided with an annular first connecting portion 12 at one end away from the first threaded hole 10, and the second stretching block 2 is provided with an annular second connecting portion 22 at one end away from the second threaded hole 20. This structure can effectively fix the tensile testing machine to the first stretching block 1 and the second stretching block 2, avoiding the loosening or displacement of the fixture caused by improper fixing methods, thereby improving the stability of the testing process and the accuracy of the test results.
[0024] As Figure 3 and Figure 4 shown, at least a pair of first disassembly and assembly holes 31 are formed on the first riveting block 3, and the first disassembly and assembly holes 31 are located on the end face of the adjacent end of the first riveting block 3 and the second riveting block 4; at least a pair of second disassembly and assembly holes 41 are formed on the second riveting block 4, and the second disassembly and assembly holes 41 are located on the end face of the adjacent end of the second riveting block 4 and the first riveting block 3. Applying this structure, after the rivet is stretched and broken, the first riveting block 3 and the second riveting block 4 can be screwed out from the first stretching block 1 and the second stretching block 2 respectively through the first disassembly and assembly holes 31 and the second disassembly and assembly holes 41, which facilitates the disassembly of the fixture and also facilitates the cleaning of the remaining rivet fragments, improving the reuse rate of the fixture.
[0025] When the utility model is in use, the operation steps are as follows:
[0026] Step 1: Install the rivet into the first riveting hole 30 of the first riveting block 3 and the second riveting hole 40 of the second riveting block 4, and use a pressure testing machine to continuously apply pressure to both ends of the rivet to cause deformation at both ends of the rivet to form a riveting point, so as to realize the riveting and fixing of the first riveting block 3 and the second riveting block 4 through the rivet;
[0027] Step 2: Thread the first riveting block 3 into the first threaded hole 10 of the first stretching block 1 to realize the assembly of the first riveting block 3 and the first stretching block 1, and thread the second riveting block 4 into the second threaded hole 20 of the second stretching block 2 to realize the assembly of the second riveting block 4 and the second stretching block 2;
[0028] Step 3: After fixing the first connecting portion 12 and the second connecting portion 22 with a tensile testing machine, apply an outward pulling force to both ends of the rivet until the rivet is pulled off, and read the test data.
[0029] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present utility model.
Claims
1. A rivet strength test fixture, characterized in that: The invention comprises a first stretching block (1) and a second stretching block (2) which are arranged opposite to each other, and a first riveting block (3) and a second riveting block (4) for riveting and fixing two ends of a rivet to be tested, wherein the first stretching block (1) is provided with a first threaded hole (10), and the first riveting block (3) is threadedly connected to the first threaded hole (10), and the second stretching block (2) is provided with a second threaded hole (20), and the second riveting block (4) is threadedly connected to the second threaded hole (20).
2. The rivet strength test fixture according to claim 1, characterized in that: The first riveting block (3) is provided with a first riveting hole (30) for accommodating one end of the rivet to be tested, and the second riveting block (4) is provided with a second riveting hole (40) for accommodating the other end of the rivet to be tested, and the first riveting hole (30) and the second riveting hole (40) are connected to each other.
3. The rivet strength testing fixture according to claim 2, characterized in that: The first stretching block (1) is provided with a first cavity (11) for accommodating a riveting point at one end of the rivet to be tested, and the first cavity (11) is communicated with the first threaded hole (10); the second stretching block (2) is provided with a second cavity (21) for accommodating a riveting point at the other end of the rivet to be tested, and the second cavity (21) is communicated with the second threaded hole (20).
4. The rivet strength test fixture according to claim 3, characterized in that: The first stretching block (1) is provided with an annular first connecting portion (12), and the first connecting portion (12) is located at an end away from the first threaded hole (10); the second stretching block (2) is provided with an annular second connecting portion (22), and the second connecting portion (22) is located at an end away from the second threaded hole (20).
5. The rivet strength testing fixture according to claim 1, characterized in that: The first riveting block (3) is provided with at least one pair of first disassembly holes (31), and the first disassembly holes (31) are located on the end surface of the first riveting block (3) and the second riveting block (4) at adjacent ends; the second riveting block (4) is provided with at least one pair of second disassembly holes (41), and the second disassembly holes (41) are located on the end surface of the second riveting block (4) and the first riveting block (3) at adjacent ends.