Test device for detecting vibration endurance strength of rivet

Abstract

The utility model 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 utility model 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] This utility model relates to the field of testing and inspection equipment, and in particular to a device for testing the vibration durability strength of rivets. Background Technology

[0002] In modern industry, rivets, as a critical connecting component, are widely used in many important fields such as aerospace, automotive manufacturing, rail transportation, and construction machinery. Due to their unique connecting properties, they play an irreplaceable role in constructing robust and reliable structural systems. During actual service, rivets are often exposed to complex vibration environments. Long-term vibration can lead to problems such as rivet loosening and fatigue fracture, thus posing 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 under long-term vibration environments has become a crucial step in ensuring the safe operation of related equipment.

[0003] Existing vibration testing devices are mainly designed for vibration durability testing of screws and are not suitable for rivet durability testing. For example, Chinese patent CN119085984A uses a vibration table and a test fixture connected to the vibration table. The test fixture has mounting holes for bolt installation, and a force sensor is placed between the test fixture and the head of the bolt to be tested for monitoring. The force sensor detects changes in bolt preload. While this fixture can detect changes in preload, it requires ensuring the force sensor is properly installed and that a pressure sensor is installed for each bolt. When there are many bolts to be tested, the connection lines between the force sensor and the testing instrument are numerous and need to be securely fixed to prevent interference or unstable signal transmission, which could affect the test results. The entire setup is complex. Secondly, unlike bolts, which are fasteners, rivets are installed by riveting them to the plate using a rivet gun. The instantaneous impact force during this process is significant. If a pressure sensor is used for detection, it may damage the force sensor located between the rivet and the plate. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem solved by this utility model is to provide a device for testing the vibration durability strength of rivets. This solves the problem that existing vibration durability strength testing devices are mainly designed for screws, the testing equipment is cumbersome to install, and it is not suitable for testing the durability strength of rivets.

[0005] To solve the above problems, the technical solution adopted by this utility model is: a device for testing the vibration durability of rivets, comprising a test base, a gun body base, and a test plate. The gun body base is installed on the test base, and the test plate is detachably connected to the surface of the test base. The test plate is provided with multiple mounting holes for rivet installation. A reference line is drawn between the rivet head disc 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 head of the vibration gun passes through the gun body base and is positioned close to the center of the test plate.

[0006] The technical principle and beneficial effects of this solution are as follows: A vibration gun vibrates a test plate, thereby testing the vibration durability of the rivets on the plate. By observing the relative displacement of the rivets to the baseline on the test plate within a set vibration duration, it is determined whether the rivets meet the vibration durability requirements. Compared to existing screw vibration durability testing devices that require force sensors for monitoring and have complex wiring when multiple rivets are tested simultaneously, this solution features a simple testing device, and the test results can be directly observed without the need for additional force sensors or corresponding testing instruments. Multiple mounting holes allow for the simultaneous installation of multiple rivets to be tested, improving testing efficiency. The overall device structure is simple, the entire system is versatile, durable, and the materials involved are readily available, resulting in low equipment costs.

[0007] Furthermore, the test plate is disc-shaped, with multiple mounting holes spaced apart along the circumference of the disc. This circular, spaced-out arrangement utilizes the geometric homogeneity of a circle to ensure that the excitation source applied by the vibrating gun radiates symmetrically in the circumferential direction. This effectively eliminates amplitude attenuation caused by positional differences, achieving consistent stress response of rivets from the same batch under dynamic loads and guaranteeing the testing results for that batch of rivets.

[0008] Furthermore, the test plate is fixed to the test base by a fixing clamp, which includes multiple pressure plates, and the pressure plates are detachably fixed to the test base by bolts.

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

[0010] Furthermore, 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 located within the circular groove. By placing the mounting hole within the groove, a bulge is easily formed on the surface of the test plate after the rivets are riveted. The groove ensures that the rivets will not interfere with the fixed part after riveting.

[0011] Furthermore, the vibratory gun head is detachably connected to a transparent scale, which is vertically positioned with its end 2-2.5 mm from the vibratory gun head. By setting the scale, when the end of the scale contacts the test plate, it indicates that the distance between the vibratory gun head and the test plate meets the requirements, and then the scale is removed. By adjusting the distance of the scale end, the distance between the vibratory gun head and the test plate can be controlled, achieving precise distance control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the detection device of this utility model.

[0013] Figure 2 A schematic diagram showing the placement of a test plate for the part.

[0014] Figure 3 This is a schematic diagram of a fixed clamp.

[0015] Figure 4 This is a schematic diagram showing the connection between the lead screw, guide rod, and support platform. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method:

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

[0018] Example 1 is basically as shown in the appendix. Figure 1 , 2 As shown: A device for testing the vibration durability of rivets 6 includes a test base 1, a gun body base 2, and a test plate 3. The gun body base is mounted on the test base 1. The test plate 3 is detachably fixed to the surface of the test base 1 by a fixing clamp 4. The fixing clamp includes three pressure plates, which are evenly spaced along the circumference of the test plate. The pressure plates are detachably fixed to the test base by bolts. The test plate 3 has multiple mounting holes 31 for mounting rivets 6. A reference line is drawn between the rivet head disc at the mounting hole 31 and the test plate. A vibration gun 5 is detachably fixed on the gun body base 2. The vibration gun 5 is located directly above the test plate 3, and the gun head of the vibration gun 5 passes through the gun body base 2 and is positioned close to the center of the test plate 3.

[0019] The test plate 3 is disc-shaped, with multiple mounting holes 31 spaced along its circumference. The test plate 3 also has a circular groove with a diameter 0.5-0.8 times the diameter of the test plate 3 (0.6 times in this embodiment). The mounting holes 31 are located within this circular groove. The number of mounting holes 31 can range from 2 to 12; 8 are used in this embodiment. The distance between the vibrating gun head 5 and the center of the upper surface of the test plate is 2-2.5 mm (2.38 mm in this embodiment). Within this distance range, the vibrating gun 5 provides better vibration to the test plate 3.

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

[0021] The test plate 3 is vibrated by a vibration gun 5 to test the vibration durability of the rivets 6 on the test plate 3. The relative displacement of the rivets 6 to the baseline on the test plate 3 is observed within a set vibration duration to determine whether the rivets 6 meet the vibration durability requirements. Compared to existing screw vibration durability testing devices that require force sensors for monitoring and have complex wiring when testing multiple screws simultaneously, this solution features a simple testing device, and the test results can be directly observed without the need for additional force sensors or corresponding testing instruments. Multiple mounting holes 31 allow for the simultaneous installation of multiple rivets 6 to be tested, improving testing efficiency. The overall device has a simple structure, strong versatility, durability, readily available materials, and low equipment cost.

[0022] The similarities between Example 2 and Example 1 will not be repeated here. The difference lies in that a transparent scale is attached to the head of the vibrating gun 5. The scale is set vertically, and the end of the scale is 2-2.5 mm away from the head of the vibrating gun 5. By setting the scale, when the end of the scale contacts the test plate 3, it indicates that the distance between the head of the vibrating gun 5 and the test plate 3 meets the requirements. Then, the scale is removed. By adjusting the distance of the end of the scale, the distance between the head of the vibrating gun 5 and the test plate 3 can be controlled, achieving precise distance control.

[0023] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for detecting a rivet vibration endurance strength test, characterized by: The device includes a testing base, a gun body base, and a test plate. The gun body base is mounted on the testing base, and the test plate is detachably connected to the surface of the testing base. The test plate has multiple mounting holes for rivet installation, and a reference line is drawn between the rivet head disc at the mounting hole and the test plate. A vibration gun is detachably fixed on the gun body base, and the vibration gun is located directly above the test plate, with the vibration gun head passing through the gun body base and positioned close to the center of the test plate.

2. The device for detecting a rivet vibration durability test according to claim 1, characterized by: The test plate is disc-shaped, and multiple mounting holes are spaced apart along the circumference of the disc.

3. The device for detecting a rivet vibration durability strength test according to claim 2, characterized by: The test plate is fixed to the test base by a fixing clamp, which includes multiple pressure plates. The pressure plates are detachably fixed to the test base by bolts.

4. The device for detecting a rivet vibration durability test according to claim 1, characterized by: The distance between the vibrating gun head and the center of the upper surface of the experimental plate is 2-2.5 mm.

5. The device for detecting a rivet vibration durability strength test according to claim 2, characterized by: The test plate has a circular groove with a diameter of 0.5-0.8 times the diameter of the test plate, and the mounting hole is located in the circular groove.

6. The device for detecting a rivet vibration durability strength test according to claim 4, characterized by: The vibrating gun head is detachably connected to a transparent scale, which is set vertically and the end of the scale is 2-2.5mm away from the vibrating gun head.

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