Test device for detecting vibration endurance strength of rivet

Abstract

The invention relates to the technical field of test detection equipment, and particularly discloses a rivet vibration endurance strength detection test device which comprises a detection base, a gun body base and a test board, the gun body base is installed on the detection base, and the test board is detachably connected to the surface of the detection base. A plurality of mounting holes for mounting rivets are formed in the test board, and a datum line is marked between a rivet head disc where the rivets are riveted at the mounting holes and the test board; a vibration gun is detachably fixed to the gun body base and located over the test plate, and a gun head of the vibration gun penetrates through the gun body base and is arranged close to the center of the test plate. The invention aims to solve the problems that an existing vibration durability strength detection device is mainly designed for screws, the installation of detection equipment is tedious, and the detection equipment is not suitable for the durability strength detection of rivets.

Description

Technical Field

[0001] The invention relates to the technical field of test and detection equipment, in particular to a device for testing the vibration endurance strength of rivets. Background Art

[0002] In the modern industrial field, rivets, as a key connecting component, are widely used in many important fields such as aerospace, automobile manufacturing, rail transportation, and engineering machinery. With its unique connection performance, it plays an irreplaceable role in building a stable and reliable structural system. In actual service, rivets are often in a complex vibration environment. Long-term vibration may cause rivet loosening, fatigue fracture and other problems, which in turn poses a serious threat to the safety and reliability of the entire structure. Therefore, conducting vibration endurance strength tests to evaluate the performance stability and reliability of rivets in a long-term vibration environment has become an important part of ensuring the safe operation of related equipment.

[0003] The existing vibration detection device is mainly a vibration durability test device for screws, and is not suitable for durability testing of rivets. For example, the Chinese patent with publication number CN119085984A sets a vibration table and a test fixture connected to the vibration table, sets a mounting hole for bolt installation on the test fixture, and sets a force sensor between the test fixture and the head of the bolt to be tested for monitoring; the change of the bolt preload is detected by the force sensor. Although the above-mentioned fixture can realize the change detection of the warning force, it is necessary to ensure that the force sensor is installed in place during use, and a pressure sensor needs to be set for each bolt to be tested. When the number of tested bolts is large, there are many connecting wires between the force sensor and the testing instrument, and the wires need to be well fixed to avoid mutual interference or unstable signal transmission, thereby affecting the test results; the installation of the entire equipment is complicated. Secondly, different from the installation method when bolts are used as fasteners, when rivets are used as fasteners, the rivets are riveted to the plate to be connected by means of a rivet gun. The instantaneous impact force in this process is large. If a pressure sensor is used for detection, the force sensor set between the rivet and the connecting plate may be damaged. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem solved by the present invention is to provide a device for testing the vibration durability strength test of rivets, thereby solving the problem that the existing vibration durability strength testing devices are mainly designed for screws, the installation of the testing equipment is cumbersome, and it is not suitable for the durability strength testing of rivets.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a device for detecting the vibration durability strength test of rivets, including a detection base, a gun body base and a test plate. The gun body fixing base is installed on the detection base, and the test plate is detachably connected to the surface of the detection base. The test plate is provided with a plurality of mounting holes for rivet installation. A reference line is drawn between the head disc of the rivet riveted at the mounting hole and the test plate. The vibration gun is detachably fixed on the gun body base. The vibration gun is located directly above the test plate, and the gun head of the vibration gun passes through the gun body base and is arranged close to the center of the test plate.

[0006] The technical principle and beneficial effects of this solution are: the test plate is vibrated by the vibration gun, so as to conduct a vibration durability test on the rivets on the test plate. By observing the relative displacement between the rivets and the reference line on the test plate within the set vibration duration, it is further judged whether the rivets meet the vibration durability strength. Compared with the existing screw vibration durability test device that needs to rely on a force sensor for monitoring, the connection is complex when multiple are detected simultaneously. The detection device of this solution is simple, and the detection result can be directly observed, without the need to additionally set a force sensor and corresponding detection instruments. By setting a plurality of mounting holes, multiple rivets to be detected can be installed at one time, improving the detection efficiency. The overall device has a simple structure, strong versatility, is durable, the involved materials are easy to purchase, and the equipment cost is low.

[0007] Furthermore, the test plate is disc-shaped, and a plurality of mounting holes are distributed at intervals along the circumference of the disc. Adopting the circular interval distribution method, this structure utilizes the geometric homogeneity of the circle to make the excitation source applied by the vibration gun form a symmetric radiation in the circumferential direction, effectively eliminating the amplitude attenuation caused by position differences, realizing the stress response consistency of the same batch of rivets under dynamic loads, and ensuring the detection effect of the same batch of rivets.

[0008] Furthermore, the test plate is fixed to the detection base through a fixing fixture. The fixing fixture includes a plurality of pressing plates, and the pressing plates are detachably fixed to the detection base through bolts.

[0009] Furthermore, the distance between the gun head of the vibration gun and the center of the upper surface of the test plate is 2 - 2.5 mm. Within this distance range, the vibration effect of the vibration gun on the test plate is better.

[0010] Furthermore, the test plate is provided with a circular groove, and the diameter of the circular groove is 0.5 - 0.8 times the diameter of the test plate. The mounting holes are arranged in the circular groove. By arranging the mounting holes in the groove, it is easy to form a bulge on the surface of the test plate after the rivets are riveted. By setting the groove, the rivets will not interfere with the fixed part after being riveted.

[0011] Further, a transparent scale is detachably connected to the vibrating gun head. The scale is arranged vertically, and the end of the scale is 2 - 2.5 mm away from the vibrating gun head. By setting the scale, when the end of the scale contacts the test plate, it indicates that the distance between the vibrating gun head and the test plate has met the requirements, and then the scale can be removed. By adjusting the distance of the end of the scale, the distance between the vibrating gun head and the test plate can be controlled to achieve precise distance control. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the detection device of the present invention.

[0013] Figure 2 It is a schematic diagram of the test plate for placing parts.

[0014] Figure 3 It is a schematic diagram of the fixing fixture.

[0015] Figure 4 It is a schematic diagram of the connection between the lead screw, guide rod and support platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following is a further detailed description through specific embodiments:

[0017] The reference numerals in the accompanying drawings of the specification include: detection base 1, support platform 11, lead screw 12, guide rod 13, gun body base 2, test plate 3, mounting hole 31, fixing fixture 4, pressing plate 41, vibrating gun 5, rivet 6.

[0018] Embodiment 1 is basically as shown in the attached Figure 1 , 2 : A device for detecting the vibration durability strength test of rivets 6, including a detection base 1, a gun body base 2 and a test plate 3. The gun body fixed base is installed on the detection base 1. The test plate 3 is detachably fixed on the surface of the detection base 1 through a fixing fixture 4. The fixing fixture includes 3 pressing plates, and the 3 pressing plates are evenly spaced along the circumferential direction of the test plate. The pressing plates are detachably fixed to the detection base through bolts. A plurality of mounting holes 31 for installing rivets 6 are provided on the test plate 3. A reference line is drawn between the head disc of the rivet 6 riveted at the mounting hole 31 and the test plate; a vibrating gun 5 is detachably fixed on the gun body base 2. The vibrating gun 5 is located directly above the test plate 3, and the gun head of the vibrating gun 5 passes through the gun body base 2 and is arranged close to the center of the test plate 3.

[0019] The test plate 3 is disc-shaped. There are a plurality of mounting holes 31 distributed at intervals along the circumference of the disc on the test plate 3. The test plate 3 is provided with a circular groove, and the diameter of the circular groove is 0.5 - 0.8 times the diameter of the test plate 3. In this embodiment, it is 0.6 times. The mounting holes 31 are arranged in the circular groove. The number of mounting holes 31 can be set to 2 - 12, and in this embodiment, it is set to 8. The distance between the tip of the vibration gun 5 and the center of the upper surface of the experimental plate is 2 - 2.5 mm, and in this embodiment, it is 2.38 mm. Within this distance range, the vibration effect of the vibration gun 5 on the test plate 3 is better.

[0020] There is a support platform 11 between the gun body base 2 and one end of the detection table. The upper end of the support platform 11 is detachably fixed to the gun body base 1 by bolts. The detection table is provided with a lead screw 12 and a guide rod 13 in the vertical direction. The support platform is threadedly connected to the lead screw and slidably connected to the guide rod; by rotating the lead screw 12, the height of the support platform 11 can be adjusted, thereby adjusting the height of the gun body base 2. To improve stability, two lead screws can be arranged in parallel and the guide rod can be removed. When adjusting the height, the two lead screws are rotated synchronously.

[0021] The test plate 3 is vibrated by the vibration gun 5, so as to conduct a vibration durability test on the rivets 6 on the test plate 3; by observing the relative displacement between the rivets 6 and the reference line on the test plate 3 within the set vibration duration, it is further determined whether the rivets 6 meet the vibration durability strength. Compared with the existing screw vibration durability test device that needs to rely on a force sensor for monitoring, the wiring is complex when multiple screws are detected simultaneously; the detection device of this solution is simple, and the detection result can be directly observed, without the need to additionally set a force sensor and corresponding detection instruments. By setting a plurality of mounting holes 31, multiple rivets 6 to be detected can be installed at one time, improving the detection efficiency. The overall device has a simple structure, strong versatility, is durable, the involved materials are easy to purchase, and the equipment cost is low.

[0022] The same parts of Embodiment 2 and Embodiment 1 will not be described in detail. The differences are as follows: The tip of the vibration gun 5 is clamped with a transparent scale. The scale is arranged in the vertical direction, and the end of the scale is 2 - 2.5 mm away from the tip of the vibration gun 5. By setting the scale, when the end of the scale contacts the test plate 3, it means that the distance between the tip of the vibration gun 5 and the test plate 3 has met the requirements, and then the scale is removed. By adjusting the distance of the end of the scale, the distance between the tip of the vibration gun 5 and the test plate 3 is controlled, realizing precise distance control.

[0023] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A device for testing the vibration durability strength of rivets, characterized in that: It includes a detection base, a gun body base and a test plate, the gun body fixed base is installed on the detection base, the test plate is detachably connected to the surface of the detection base, a plurality of mounting holes for rivet installation are provided on the test plate, and a reference line is drawn between the nail head disk riveted at the mounting hole and the test plate; a vibration gun is detachably fixed on the gun body base, the vibration gun is located directly above the test plate, and the vibration gun head passes through the gun body base and is arranged close to the center of the test plate.

2. The device for testing the vibration durability strength of rivets according to claim 1, characterized in that: The test plate is in the shape of a disk, and a plurality of mounting holes are spaced apart along the circumference of the disk on the test plate.

3. The device for testing the vibration durability strength of rivets according to claim 2, characterized in that: The test plate is fixed to the detection base by a fixing fixture, and the fixing fixture includes a plurality of pressing plates, and the pressing plates are detachably fixed to the detection base by bolts.

4. The device for testing the vibration durability strength of rivets according to claim 1, characterized in that: The distance between the vibration gun tip and the center of the upper surface of the test plate is 2-2.5 mm.

5. The device for testing the vibration durability strength of rivets according to claim 2, characterized in that: The test plate is provided with a circular groove, the diameter of which is 0.5-0.8 times the diameter of the test plate, and the mounting hole is arranged in the circular groove.

6. The device for testing the vibration durability strength of rivets according to claim 4, characterized in that: The vibration gun head is detachably connected with a transparent scale, the scale is arranged in a vertical direction, and the end of the scale is 2-2.5 mm away from the vibration gun head.

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