Rivet nut coaxiality testing device and testing method
By designing a rivet nut coaxiality testing device, and utilizing a combination of test collar and test punch for detection points, the problem of incomplete rivet nut coaxiality detection in the existing technology is solved, achieving accurate rivet nut coaxiality detection and improving riveting quality.
Patent Information
- Application Number
- CN202511142881.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2025-11-28
AI Technical Summary
Existing technology cannot fully detect the coaxiality of rivet nuts, leading to uneven riveting.
A coaxiality testing device for rivet nuts was designed, including a bearing base, a guide column, a test template, and a test pin assembly. By combining a test collar and a test punch, multiple detection points are set to achieve coaxiality testing of rivet holes and threaded holes.
It enables precise coaxiality detection of rivet nuts, ensuring uniformity of riveting quality and improving the production quality of rivet nuts.
Smart Images
Figure CN121025933A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to rivet nut detection equipment technical field, specifically, it relates to a kind of rivet nut coaxial degree testing device and testing method. BACKGROUND
[0002] Rivet nut is fastened with bolt, mainly applied after the connection of different components can let two components be connected closely, simultaneously increase sealing effect.
[0003] At present, test rivet nut coaxial degree is inserted into rivet nut rivet hole with mandrel or needle gauge, small diameter part is inserted into thread bottom hole, whether the large diameter part can be smoothly inserted into rivet hole is judged to judge whether the inner hole coaxial degree of rivet nut is qualified, this method can only measure the coaxial degree of rivet hole and thread bottom hole, but cannot measure the coaxial degree of rivet hole and external rod diameter, when fastening with bolt, because rivet hole and thread bottom hole are coaxial in a certain range, but after bolt is installed to thread bottom hole, the coaxial degree of bolt and rivet hole can exist deviation, thus leading to uneven deformation when rivet hole part is crushed, influence riveting effect. SUMMARY
[0004] The present application proposes a kind of rivet nut coaxial degree testing device and testing method, solve the problem that rivet nut detection coaxial degree detection is not complete in prior art, leading to possible uneven riveting.
[0005] The technical scheme of the present application is as follows:
[0006] A kind of rivet nut coaxial degree testing device, the testing device includes bearing base, guide column, test template and test needle assembly, wherein, bearing hole is provided on the bearing base, the bearing hole is used to install rivet nut, a plurality of guide columns are arranged on the bearing base, the test template can be lifted along the guide column and is arranged above the bearing base, the test needle assembly is arranged on the test template and corresponds to the bearing hole, the test needle assembly includes test punch, test collar, wherein, the test punch includes thread hole test section and rivet hole test section and is coaxially arranged, the test collar is sleeved on the thread hole test section and can move along the axial direction of the thread hole test section, first detection point is arranged on the test collar and is used to detect the matching coaxial degree of the test collar and rivet hole, second detection point is arranged on the thread hole test section and is used to detect the cooperation of the thread hole test section and thread hole, third detection point is arranged on the rivet hole test section and is used to detect the cooperation of the rivet hole test section and rivet hole.
[0007] The second detection point is located between the top of the thread hole test section and the top of the test collar in initial position.
[0008] The test device further comprises springs, the number of the springs is same as the number of the guide columns, the springs are sleeved on the guide columns, and the springs are located between the test template and the bearing base.
[0009] The bearing base comprises a lower base plate and a bearing template, the guide columns are arranged on the lower base plate, and guide holes are arranged on the bearing template and are sleeved on the guide columns.
[0010] A rivet nut coaxiality test method, the test method comprising the following steps:
[0011] The test method comprises the following steps:
[0012] First-order coaxiality detection, the test template is lowered until the first detection point detection trigger and until the second detection point trigger;
[0013] Second-order coaxiality detection, when the first-order coaxiality detection is passed, the test template continues to be lowered until the first detection point, the second detection point and the third detection point are triggered at the same time, and it is determined that the detection is passed.
[0014] The working principle and beneficial effects of the present application are as follows:
[0015] In the present application, a rivet nut coaxiality test device is disclosed, the rivet nut to be tested is placed into a bearing hole on a bearing base, a test template on the bearing base is arranged through a guide column lifting device, a test needle assembly corresponding to the rivet nut to be tested is arranged on the test template, the test needle assembly is composed of a test punch and a test sleeve, wherein the test punch is divided into two coaxial sections, namely a thread hole test section and a rivet hole test section, the test sleeve is sleeved on the thread hole test section and can move axially, a first detection point is arranged on the test sleeve, a second detection point is arranged on the thread hole test section, and a third detection point is arranged on the rivet hole test section, in operation, the test sleeve first cooperates with the rivet hole, the first detection point detects whether the coaxiality of the test sleeve and the rivet hole meets the requirements, under the premise that the rivet hole coaxiality test meets the requirements, the thread hole test section is inserted into the thread hole of the rivet nut, the second detection point detects whether the thread hole test section and the thread hole are in place, with the thread hole test section inserted into the thread hole, the test sleeve moves along the thread hole test section and remains in the rivet hole, at the same time, the third detection point on the rivet hole test section can be triggered after the rivet hole test section is inserted into the rivet hole, if the rivet hole processing does not meet the design requirements, the rivet hole test section cannot be smoothly inserted into the thread hole, the third detection point cannot be triggered, that is, the rivet nut processing does not meet the requirements, and the above-mentioned scheme solves the problem that the rivet nut detection coaxiality detection is not complete in the prior art, which may cause uneven riveting. BRIEF DESCRIPTION OF DRAWINGS
[0016] The application will be described in further detail below with reference to the drawings and specific embodiments.
[0017] Figure 1 Structure diagram of the application Figure 1 Wherein the position relationship between the test pin assembly and the rivet nut before testing is shown.
[0018] Figure 2 Structure diagram of the application Figure 2 Wherein the position relationship between the test pin assembly and the rivet nut before testing is shown.
[0019] Figure 3 Structure diagram of the application Figure 3 Wherein the position relationship between the test pin assembly and the rivet nut before testing is shown.
[0020] Figure 4 Structure diagram of the application Figure 4 Wherein the position relationship between the test pin assembly and the rivet nut before testing is shown.
[0021] Figure 5 Structure diagram of the test pin assembly of the application
[0022] In the figure: 1, bearing base, 2, guide column, 3, test template, 4, bearing hole, 5, test punch pin, 6, test collar, 7, threaded hole test section, 8, rivet hole test section, 9, first detection point, 10, second detection point, 11, third detection point, 12, spring, 13, lower bolster plate, 14, bearing template. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative work are involved in the protection scope of the application.
[0024] As Figures 1-5As shown, the embodiment provides a rivet nut coaxiality testing device, which comprises a bearing base 1, guide columns 2, a testing template 3 and a testing needle assembly, wherein the bearing base 1 is provided with a bearing hole 4 for installing a rivet nut, a plurality of guide columns 2 are arranged on the bearing base 1, the testing template 3 is arranged above the bearing base 1 and can be lifted along the guide columns 2, the testing needle assembly is arranged on the testing template 3 and corresponds to the bearing hole 4, the testing needle assembly comprises a testing punch 5, a testing sleeve 6, wherein the testing punch 5 comprises a threaded hole testing section 7 and a rivet hole testing section 8 and is coaxially arranged, the testing sleeve 6 is sleeved on the threaded hole testing section 7 and can move along the axial direction of the threaded hole testing section 7, the testing sleeve 6 is provided with a first detection point 9 and is used for detecting the fitting coaxiality of the testing sleeve 6 and a rivet hole, the threaded hole testing section 7 is provided with a second detection point 10 and is used for detecting the cooperation of the threaded hole testing section 7 and a threaded hole, and the rivet hole testing section 8 is provided with a third detection point 11 and is used for detecting the cooperation of the rivet hole testing section 8 and a rivet hole.
[0025] In the embodiment, a rivet nut coaxiality testing device is provided, the rivet nut to be tested is placed into the bearing hole 4 on the bearing base 1, the testing template 3 on the bearing base 1 is arranged by lifting through the guide columns 2, the testing needle assembly corresponding to the rivet nut to be tested is arranged on the testing template 3, the testing needle assembly is composed of the testing punch 5 and the testing sleeve 6, wherein the testing punch 5 is divided into two coaxial sections, i.e., the threaded hole testing section 7 and the rivet hole testing section, the testing sleeve 6 is sleeved on the threaded hole testing section 7 and can move along the axial direction thereof, the first detection point 9 is arranged on the testing sleeve 6, the second detection point 10 is arranged on the threaded hole testing section 7, and the third detection point 11 is arranged on the rivet hole testing section 8, in operation, the testing sleeve 6 is first cooperated with the rivet hole, the first detection point 9 detects whether the coaxiality of the testing sleeve 6 and the rivet hole meets the requirements, under the premise that the rivet hole coaxiality testing meets the requirements, the threaded hole testing section 7 is inserted into the threaded hole of the rivet nut, the second detection point 10 detects whether the threaded hole testing section 7 and the threaded hole are cooperated in place, along with the threaded hole testing section 7 inserted into the threaded hole, the testing sleeve 6 moves along the threaded hole testing section 7 and is kept in the rivet hole, at the same time, the third detection point 11 on the rivet hole testing section 8 can be triggered after the rivet hole testing section 8 is inserted into the rivet hole, if the rivet hole processing does not meet the design requirements, the rivet hole testing section 8 cannot be smoothly inserted into the threaded hole, the third detection point 11 cannot be triggered, i.e., the rivet nut processing does not meet the requirements.
[0026] In possible embodiments, a micro proximity switch can be arranged in the test punch 5 and the test collar 6 as the detection component of each detection point, i.e. the first detection point 9, the second detection point 10 and the third detection point 11, and the micro proximity switch is connected with the data analysis unit to obtain information whether it is triggered. Specifically, a channel is arranged in the test punch 5, an opening is formed on the side of the rivet hole test section 8 and the threaded hole test section 7, the detection end of the micro proximity switch faces the opening of the channel. Similarly, a channel is also formed on the test collar 6, the micro proximity switch is arranged in the channel and faces the opening of the channel. When the test collar 6, the threaded hole test section 7 and the rivet hole test section 8 are inserted into the rivet nut, the side wall of the inner hole of the rivet nut blocks the micro proximity switch, which triggers the response. If the hole of the rivet nut is not processed according to the requirements, the test punch cannot be inserted, and the detection point does not trigger the response. A sliding groove can be arranged on the threaded hole test section 7, and the test collar 6 can move axially along the threaded hole test section 7 by arranging a sliding block on the inner side and cooperating with the sliding groove. The lifting of the test template 3 can be driven by a lifting drive, which can be a pneumatic telescopic device. An overpressure protection is arranged to protect the test punch assembly when the rivet nut is not processed according to the requirements and the test punch cannot be inserted into the interior.
[0027] The second detection point 10 is located between the top of the threaded hole test section 7 and the top of the test collar 6 in the initial position.
[0028] On the basis of the above-mentioned embodiments, the position of the second detection point 10 provided on the threaded hole test section 7 is optional. In a possible embodiment, when the test collar 6 is located at an initial position of the threaded hole test section 7, before the test needle assembly contacts the rivet nut, the second detection point 10 can be arranged in a region between the top of the threaded hole test section 7 and the top of the test collar 6. Then, during the test process, the test collar 6 first cooperates with the rivet hole of the rivet nut. If the rivet hole is processed qualified, the test collar 6 can extend into the rivet hole, and the first detection point 9 is triggered. At this time, the rivet hole part of the rivet nut is qualified in coaxiality with the test collar 6. On this basis, the second detection point 10 on the threaded hole test section 7 is not triggered. With the threaded hole test section 7 extending into the threaded hole of the rivet nut, the second detection point 10 will pass through the rivet hole part, the inner diameter of the test collar 6 and the threaded hole part in turn. In this process, the detection accuracy of the second detection point 10 can be selected, for example, the second detection point 10 is not triggered when passing through the rivet hole part, and is triggered only when passing through the test collar 6 and the threaded hole part. At the same time, with the rivet hole test section 8 entering the rivet hole part, the third detection point 11 is triggered, so that the detection is completed. In this process, when the first detection point 9 is triggered, the test collar 6 initially enters the rivet hole. With the second detection point 10 being triggered, the test collar 6 has detected the rivet hole part. On the premise of ensuring that the rivet hole and the outer rod diameter maintain qualified coaxiality, the coaxiality detection of the threaded hole and the rivet hole is carried out again to realize accurate measurement and improve the quality control of the rivet nut.
[0029] The test device further comprises springs 12, the number of the springs 12 being the same as the number of the guide columns 2, the springs 12 being sleeved on the guide columns 2, and the springs 12 being located between the test template 3 and the bearing base 1.
[0030] In this embodiment, the springs 12 are sleeved on the guide columns 2 to provide power for the lifting of the test template 3.
[0031] The bearing base 1 comprises a lower base plate 13 and a bearing template 14, the guide columns 2 are arranged on the lower base plate 13, and the bearing template 14 is provided with guide holes, and the guide holes of the bearing template 14 are sleeved on the guide columns 2.
[0032] In this embodiment, the bearing base 1 is provided with the guide columns 2 mounted on the lower base plate 13, the bearing template 14 is provided with the guide holes, and the bearing template 14 is sleeved on the guide columns 2 to accurately position the bearing template 14. The test template 3 is also sleeved on the guide columns 2, so that the test template 3 and the bearing template 14 accurately correspond in position.
[0033] The application also discloses a rivet nut coaxiality testing method, which comprises the following steps.
[0034] The rivet nut to be tested is installed in the bearing hole 4;
[0035] First-order coaxiality detection: the testing template 3 is lowered until the first detection point 9 triggers detection and until the second detection point 10 triggers;
[0036] Second-order coaxiality detection: after the first-order coaxiality detection passes, the testing template 3 continues to be lowered until the first detection point 9, the second detection point 10 and the third detection point 11 trigger at the same time, and the detection is determined to pass.
[0037] In the embodiment, the testing method is based on the technical concept of the application, measures the coaxiality between the rivet hole and the threaded hole on the premise that the rivet hole and the external rod diameter are coaxial and qualified, thereby improving the production quality of the rivet nut. The rivet nut is installed in the bearing hole 4 for fixation, and then the testing template 3 is lowered. With the lowering of the testing template 3, the test sleeve 6 is firstly preliminarily matched with the rivet hole of the rivet nut. If the coaxiality between the rivet hole and the external rod diameter is qualified, the test sleeve 6 can extend into the rivet hole, and the first detection point 9 on the test sleeve 6 triggers. With the continuous lowering of the testing template 3, the second detection point 10 on the threaded hole testing section 7 passes through the test sleeve 6 and begins to be preliminarily inserted into the threaded hole. The second detection point 10 triggers. At this time, the test sleeve 6 has already fallen into the bottom of the rivet hole. Since the threaded hole diameter is small, the test sleeve 6 moves upward relative to the threaded hole testing section 7. The testing template 3 continues to be lowered. When the third detection point 11 also triggers, that is, the rivet hole testing section 8 extends into the rivet hole, the coaxiality between the rivet hole and the threaded hole is also qualified on the premise that the coaxiality between the rivet hole and the external rod diameter is qualified, thereby improving the production quality of the rivet nut.
[0038] The above is only a preferred embodiment of the application, and is not used to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.
Claims
1. A device for testing the coaxiality of rivet nuts, characterized in that, The testing device includes a support base (1), guide posts (2), a test template (3), and a test needle assembly. The support base (1) has a support hole (4) for installing a rivet nut. Multiple guide posts (2) are disposed on the support base (1). The test template (3) can be raised and lowered above the support base (1) along the guide posts (2). The test needle assembly is disposed on the test template (3) and corresponds to the support hole (4). The test needle assembly includes a test punch (5) and a test collar (6). The test includes a threaded hole test section (7) and a rivet hole test section (8) and are coaxially arranged. The test collar (6) is sleeved on the threaded hole test section (7) and can move along the axial direction of the threaded hole test section (7). The test collar (6) is provided with a first detection point (9) and is used to detect the coaxiality of the fit between the test collar (6) and the rivet hole. The threaded hole test section (7) is provided with a second detection point (10) and is used to detect the fit between the threaded hole test section (7) and the threaded hole. The rivet hole test section (8) is provided with a third detection point (11) and is used to detect the fit between the rivet hole test section (8) and the rivet hole.
2. The rivet nut coaxiality testing device according to claim 1, characterized in that, The second detection point (10) is located between the top of the threaded hole test section (7) and the top of the test collar (6) in the initial position.
3. The rivet nut coaxiality testing device according to claim 2, characterized in that, The testing device also includes springs (12), the number of which is the same as the number of guide posts (2). The springs (12) are sleeved on the guide posts (2) and are located between the test template (3) and the support base (1).
4. The rivet nut coaxiality testing device according to claim 3, characterized in that, The bearing base (1) includes a lower pad (13) and a bearing template (14). The guide post (2) is disposed on the lower pad (13). The bearing template (14) is provided with a guide hole, and the guide hole of the bearing template (14) is sleeved on the guide post (2).
5. A method for testing the coaxiality of a rivet nut, wherein the testing method is applied to the rivet nut coaxiality testing device according to any one of claims 1 to 4, characterized in that, The testing method includes the following steps: Install the rivet nut to be tested, and install the rivet nut to be tested into the bearing hole (4); First-order coaxiality detection: the test template (3) descends until the first detection point (9) is detected and triggered, and continues until the second detection point (10) is triggered. For the second-order coaxiality test, after the first-order coaxiality test is passed, the test template (3) continues to descend until the first detection point (9), the second detection point (10) and the third detection point (11) are triggered simultaneously, and the test is judged to be passed.