Detection tool for detecting whether riveting torque of riveting nut of aluminum plate is qualified or not
By designing a testing tool with graduated lines, the problem of time-consuming and damaging nut testing of aluminum sheet rivet nuts in existing technologies has been solved, achieving fast and accurate testing results and saving manpower and resources.
Patent Information
- Application Number
- CN202520780293.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-23
AI Technical Summary
Existing methods for testing the riveting torque of aluminum sheet rivet nuts are time-consuming and may damage the nuts, affecting their service life.
A testing tool including a handheld bar and a testing section was designed. The testing section has a first and a second scale line, which is used to measure the depth between the outer end face of the rivet nut and the inner thread end face. The torque is judged by the scale line.
It enables rapid and accurate detection of whether the torque of rivet nuts is up to standard, avoiding nut damage and wasted time, and saving manpower and resources.
Smart Images
Figure CN223976777U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to a testing tool, specifically a testing tool for testing whether the riveting torque of rivet nuts on aluminum sheets is qualified. Background technology:
[0002] With the increasing proportion of new energy vehicles, most mainstream domestic automobile manufacturers have begun to adopt lightweight aluminum components to reduce vehicle weight and increase mileage.
[0003] However, some major load-bearing components currently require reinforcements to be added to the aluminum profiles. The installation of these reinforcements requires additional bolt mounting points, which are achieved by setting rivet nuts at corresponding positions on the aluminum profiles (i.e., drilling holes in the aluminum profile walls and installing rivet nuts in the drilled holes).
[0004] After installing rivet nuts, it is necessary to determine whether the rivet nuts are installed correctly. Currently, the correct installation method is to measure the torque value of the rivet nuts with a torque wrench. However, measuring each rivet nut with a torque wrench is time-consuming and also reduces the service life of the rivet nuts. Summary of the Invention:
[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a testing tool for detecting whether the riveting torque of rivet nuts on aluminum plates is qualified. This testing tool for detecting whether the riveting torque of rivet nuts on aluminum plates is qualified is reasonably designed and facilitates the simple and quick detection of whether the riveting torque of rivet nuts is qualified.
[0006] This utility model is implemented using the following solution.
[0007] This utility model relates to a testing tool for detecting whether the riveting torque of rivet nuts on aluminum sheets is qualified. The tool is characterized by including a hand-held rod and a testing section on the front of the hand-held rod. The testing section is provided with a first scale line and a second scale line for detecting the depth between the outer end face of the rivet nut and the inner thread end face of the rivet nut.
[0008] Preferably, the radial dimension of the detection section is greater than the internal thread diameter of the rivet nut and less than the diameter of the countersunk hole in the rivet nut.
[0009] Preferably, the distance from the first scale line to the end face of the detection section corresponds to the depth between the outer end face of the rivet nut and the inner thread end face of the rivet nut when the rivet nut is at its maximum torque, and the distance from the second scale line to the end face of the detection section corresponds to the depth between the outer end face of the rivet nut and the inner thread end face of the rivet nut when the rivet nut is at its minimum torque.
[0010] Preferably, the handheld rod is a metal cylindrical rod with a diameter of 10 mm and a length of 100 mm, and the detection section is a cylindrical section with a diameter of 9 mm and a length of 15 mm.
[0011] Preferably, the distance from the first scale line to the end face of the detection section is 4.5mm, and the distance from the second scale line to the end face of the detection section is 6.5mm.
[0012] The method of using the testing tool for detecting whether the riveting torque of aluminum sheet rivet nuts is qualified is as follows: Insert the testing section of the hand-held rod into the countersunk hole of the aluminum sheet rivet nut from top to bottom, with the end face of the testing section abutting against the internal thread end face of the rivet nut. When the outer end face of the rivet nut is between the first and second scale lines, it indicates that the riveting torque of the rivet nut is qualified. When the outer end face of the rivet nut is lower than the first scale line, it indicates that the riveting torque of the rivet nut is greater than the maximum torque, and the riveting of the rivet nut is unqualified. When the outer end face of the rivet nut is higher than the second scale line, it indicates that the riveting torque of the rivet nut is less than the minimum torque, and the riveting of the rivet nut is unqualified.
[0013] The design mechanism of this utility model for testing the riveting torque of rivet nuts on aluminum sheets is as follows: Testing revealed that the installation stroke of the rivet nut (the collapsing stroke of the rivet nut head) directly determines its torque. When installed on aluminum sheets of the same thickness, a larger installation stroke results in a larger torque, and a smaller installation stroke results in a smaller torque. A longer collapsing stroke of the rivet nut head corresponds to a shorter distance between the rivet nut's tail end and its outer end face. Conversely, a shorter collapsing stroke of the rivet nut head corresponds to a longer distance between the rivet nut's tail end and its outer end face. However, the tail end of the rivet nut is open (i.e., the screw thread in the rivet nut is open). Since the rivet nut has a through hole to allow for a longer threaded locking when installing bolts, the testing tool of this application cannot be used for testing due to the lack of an inner reference point. However, the inventor discovered that the inner hole of the rivet nut is a countersunk hole (i.e., the diameter of the threaded hole of the rivet nut is smaller than the diameter of the inner hole of the collapsible section). Therefore, the inner thread end face of the rivet nut (i.e., the end face of the threaded hole of the rivet nut that is closest to the outer end face of the rivet nut) can be used as the inner reference point of the testing tool of this application. Thus, based on the above-mentioned relationship between the rivet stroke and the torque of the rivet nut, and the special structure of the rivet nut, the testing tool of this application was invented.
[0014] This utility model testing tool has a simple structure and is easy to process. It is convenient to perform a full inspection of whether the torque of the rivet nut is qualified, and it is also highly accurate. At the same time, using this tool will not damage the rivet nut or cause a waste of time, saving manpower and resources. Unlike torque wrenches, it does not affect the nut's lifespan by performing load tests, nor does it cause the nut to be scrapped by performing destructive tests, requiring repair and replacement with a new rivet nut. Attached image description:
[0015] The present invention will be further described below with reference to the accompanying drawings;
[0016] Figure 1 This is a front view of the testing tool of this utility model;
[0017] Figure 2 , 3 These are cross-sectional views of the detection section in two embodiments of the detection tool of this utility model;
[0018] Figure 4 This is a cross-sectional view of a rivet nut placed in an aluminum sheet without being riveted.
[0019] Figure 5 This is a cross-sectional view of the rivet nut after it has been placed in the aluminum sheet and riveted.
[0020] Figure 6 This is a cross-sectional view of the testing tool of this utility model inserted into the countersunk hole of the rivet nut for testing;
[0021] Figure 7 This is a schematic diagram of the testing tool of this utility model being inserted into the countersunk hole of the rivet nut on the aluminum sheet for testing. Detailed implementation method:
[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0023] This utility model relates to a testing tool for detecting whether the riveting torque of rivet nuts on aluminum sheets is qualified. It includes a hand-held rod 1 and a testing section 2 provided on the front of the hand-held rod. The testing section is provided with a first scale line 3 and a second scale line 4 for detecting the depth between the outer end face A2 of the rivet nut and the inner thread end face A3 of the rivet nut.
[0024] Specifically, the radial dimension of the detection section 2 is greater than the diameter of the internal thread A4 of the rivet nut A1 and less than the diameter of the inner countersunk hole A5 of the rivet nut. The detection section 2 can be a cylinder (the diameter of which is greater than the diameter of the internal thread A4 of the rivet nut A1 and less than the diameter of the inner countersunk hole A5 of the rivet nut), or a cylinder with one or two flattened platform surfaces 5.
[0025] The distance from the first scale line 3 to the end face 6 of the detection section corresponds to the depth between the outer end face A2 of the rivet nut and the inner thread end face A3 of the rivet nut when the rivet nut is at its maximum torque. The distance from the second scale line 4 to the end face 6 of the detection section corresponds to the depth between the outer end face A2 of the rivet nut and the inner thread end face A3 of the rivet nut when the rivet nut is at its minimum torque.
[0026] Taking the internal thread A4 with a diameter of M8 as an example, the hand-held bar is a metal cylindrical bar with a diameter of 10mm and a length of 100mm, and the detection section is a cylindrical section with a diameter of 9mm and a length of 15mm; the distance from the first scale line to the end face of the detection section is 4.5mm, and the distance from the second scale line to the end face of the detection section is 6.5mm.
[0027] For ease of viewing, the first and second scale lines are 1mm deep and 0.3mm wide, and the inside of the scale lines is painted with red ink to facilitate visual inspection.
[0028] The preferred detection section 2 of this utility model is cylindrical, and the first scale line 3 and the second scale line 4 are engraved on the entire circumference of the cylindrical detection section. The detection section 2, the first scale line 3 and the second scale line 4 can be obtained by one-way machining on a lathe.
[0029] The method of using the testing tool for detecting whether the riveting torque of rivet nuts on aluminum sheets is qualified is as follows: Insert the testing section 2 of the hand-held rod 1 into the countersunk hole of the rivet nut A1 on the aluminum sheet A0 from top to bottom. The end face 6 of the testing section rests against the internal thread end face A3 of the rivet nut. When the outer end face A2 of the rivet nut is between the first scale line and the second scale line, it indicates that the riveting torque of the rivet nut is qualified. When the outer end face A2 of the rivet nut is lower than the first scale line 3, it indicates that the riveting torque of the rivet nut is greater than the maximum torque, and the riveting of the rivet nut is unqualified. When the outer end face A2 of the rivet nut is higher than the second scale line 4, it indicates that the riveting torque of the rivet nut is less than the minimum torque, and the riveting of the rivet nut is unqualified.
[0030] The design mechanism of this utility model for testing the riveting torque of rivet nuts on aluminum sheets is as follows: Testing revealed that the installation stroke of the rivet nut (the collapsing stroke of the rivet nut head) directly determines its torque. When installed on aluminum sheets of the same thickness, a larger installation stroke results in a larger torque, and a smaller installation stroke results in a smaller torque. A longer collapsing stroke of the rivet nut head corresponds to a shorter distance between the rivet nut's tail end and its outer end face, while a shorter head collapsing stroke corresponds to a longer distance between the rivet nut's tail end and its outer end face. However, the tail end of the rivet nut is open (i.e., the thread in the rivet nut). The hole is a through hole so that a longer thread can be used for locking when installing bolts. Therefore, the testing tool of this application cannot be used for testing because there is no inner reference point. However, the inventor discovered that the inner hole of the rivet nut is a countersunk hole (that is, the diameter of the threaded hole of the rivet nut is smaller than the inner hole diameter of the collapsible section). Therefore, the inner thread end face A3 of the rivet nut (that is, the end face position of the threaded hole of the rivet nut closest to the outer end face of the rivet nut) can be used as the inner reference point of the testing tool of this application. Therefore, based on the above-mentioned relationship between the rivet stroke and the torque of the rivet nut, and the special structure of the rivet nut, the testing tool of this application was invented.
[0031] When manufacturing this utility model testing tool, according to the riveting stroke of different models of rivet nuts, the depth between the outer end face A2 of the rivet nut and the inner thread end face A3 of the rivet nut corresponding to the maximum torque and minimum torque requirements is measured (a and b, where a corresponds to the depth of the maximum torque and b corresponds to the depth of the minimum torque). The first scale line 3 and the second scale line 4 are engraved at a certain distance from the end face 6 of the testing section (e.g., the distance between the first scale line 3 and the end face 6 of the testing section is a1, and the distance between the second scale line 4 and the end face 6 of the testing section is b1, where a1=a and b1=b).
[0032] In addition, the testing tool of this utility model can also be used as a debugging tool. When the outer end face of the rivet nut is lower than the first scale line, the actual torque of the rivet nut is greater than the maximum torque. The rivet gun should appropriately reduce the rivet stroke to reduce the torque of the rivet nut. When the outer end face of the rivet nut is higher than the second scale line, the actual torque of the rivet nut is less than the minimum torque. The rivet gun should appropriately increase the rivet stroke to increase the torque of the rivet nut to meet the standard.
[0033] This utility model testing tool has a simple structure and is easy to process. It is convenient to perform a full inspection of whether the torque of the rivet nut is qualified, and it is also highly accurate. At the same time, using this tool will not damage the rivet nut or cause a waste of time, saving manpower and resources. Unlike torque wrenches, it does not affect the nut's lifespan by performing load tests, nor does it cause the nut to be scrapped by performing destructive tests, requiring repair and replacement with a new rivet nut.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.
Claims
1. A detection tool for detecting whether the rivet nut riveting torque of an aluminum plate material is qualified, characterized in that: The hand-held rod and the detection section arranged on the front section of the hand-held rod, the detection section is provided with a first scale line and a second scale line for detecting the depth between the outer end surface of the rivet nut and the inner threaded end surface of the rivet nut.
2. The detection tool for detecting whether the rivet nut riveting torque of the aluminum plate material is qualified according to claim 1, characterized in that: The radial dimension of the detection section is greater than the inner threaded diameter of the rivet nut and less than the diameter of the inner counterbore of the rivet nut.
3. The detection tool for detecting whether the rivet nut riveting torque of an aluminum plate material is qualified according to claim 1 or 2, characterized in that: The distance between the first scale line and the end surface of the detection section corresponds to the depth between the outer end surface of the rivet nut and the inner threaded end surface of the rivet nut when the maximum torque of the rivet nut, and the distance between the second scale line and the end surface of the detection section corresponds to the depth between the outer end surface of the rivet nut and the inner threaded end surface of the rivet nut when the minimum torque of the rivet nut.
4. The detection tool for detecting whether the rivet nut riveting torque of the aluminum plate material is qualified according to claim 3, characterized in that: The hand-held rod is a metal cylindrical rod with a diameter of 10 mm and a length of 100 mm, and the detection section is a cylindrical section with a diameter of 9 mm and a length of 15 mm.
5. The detection tool for detecting whether the rivet nut riveting torque of the aluminum plate material is qualified according to claim 4, characterized in that: The distance between the first scale line and the end surface of the detection section is 4.5 mm, and the distance between the second scale line and the end surface of the detection section is 6.5 mm.