Tool for detecting push-out force of aluminum alloy self-plugging rivet in non-installation state

Abstract

The utility model relates to the technical field of self-plugging rivet detection tools, and particularly discloses a tool for detecting the push-out force of an aluminum alloy self-plugging rivet in a non-installation state, the tool comprises a base, a rivet placement block and an auxiliary sleeve, the base is sequentially provided with a first through hole and a second through hole from top to bottom in the vertical direction, and the first through hole and the second through hole are coaxial; the diameter of the first through hole is larger than that of the second through hole, the rivet placing block is placed at the first through hole, the rivet placing block is provided with a third through hole used for locating a rivet sleeve of the aluminum alloy self-plugging rivet, and the auxiliary sleeve is placed above the rivet placing block to locate a core rod of the aluminum alloy self-plugging rivet. The auxiliary sleeve is sequentially provided with a fourth through hole and a fifth through hole which are coaxial from top to bottom, the diameter of the fifth through hole is larger than that of the fourth through hole, a rivet cap on the rivet sleeve can be contained in the fifth through hole, a core rod of the aluminum alloy self-plugging rivet can be contained in the fourth through hole, and the height of the auxiliary sleeve is smaller than the length of the part, exposed out of the rivet sleeve, of the core rod. The tool is simple in structure, convenient to use and high in universality.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for testing blind rivets, specifically a tooling for testing the pushing force of aluminum alloy blind rivets in their non-installed state. Background Technology

[0002] Blind rivets are crucial fasteners for aerospace vehicles, especially those used for aircraft skin. They require extremely high strength and locking performance. Blind rivets typically consist of a mandrel and a sleeve. Aluminum alloy blind rivets are commonly used in the aerospace field. The material strength of aluminum alloy blind rivets is higher than that of conventional aluminum blind rivets. The sleeve has a rivet head. Besides ensuring locking performance, the push-out force between the mandrel and sleeve when not installed is also a crucial parameter for judging the quality of the blind rivet. This push-out force is the initial bonding force between the mandrel and sleeve. If the bonding force is low when the mandrel and sleeve are not installed, it may lead to accidental detachment of the mandrel or abnormal fracture force during installation, affecting the use of the blind rivet. While there are many tooling tools for testing the locking force of blind rivets, there is no tooling specifically for testing the push-out force of aluminum alloy blind rivets when not installed. Therefore, it is necessary to design a tooling for testing the push-out force of aluminum alloy blind rivets to determine their quality. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention provides a tooling for detecting the push-out force of aluminum alloy blind rivets in their non-installed state, thus solving the problem that existing technologies lack tooling for detecting the push-out force of aluminum alloy blind rivets when they are not installed.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a tooling for detecting the pushing force of an aluminum alloy blind rivet in its non-installed state, comprising a base, a rivet placement block, and an auxiliary sleeve. The base has a first through hole and a second through hole arranged coaxially from top to bottom in a vertical direction. The diameter of the first through hole is larger than the diameter of the second through hole. The rivet placement block is placed at the first through hole. The rivet placement block has a third through hole for positioning the rivet sleeve of the aluminum alloy blind rivet. The auxiliary sleeve is placed above the rivet placement block to position the core rod of the aluminum alloy blind rivet. The auxiliary sleeve has a fourth through hole and a fifth through hole arranged coaxially from top to bottom. The diameter of the fifth through hole is larger than the diameter of the fourth through hole. The fifth through hole can accommodate the rivet head on the rivet sleeve, and the fourth through hole can accommodate the core rod of the aluminum alloy blind rivet. The height of the auxiliary sleeve is less than the length of the part of the core rod protruding from the rivet sleeve.

[0005] Furthermore, the thickness of the rivet placement block is greater than the height of the first through hole, and the rivet placement block protrudes from the upper surface of the base when installed in the first through hole.

[0006] Furthermore, the third through hole is a conical countersunk hole, with the upper part of the third through hole being conical.

[0007] Furthermore, the rivet placement block is clearance-fitted with the first through hole of the base.

[0008] Furthermore, the third through hole of the rivet placement block is clearance-fitted with the aluminum alloy blind rivet, and the diameter of the third through hole is smaller than the diameter of the rivet head of the aluminum alloy blind rivet.

[0009] The beneficial effects of this solution are as follows: Compared with existing technologies, this utility model can detect the pushing force of aluminum alloy blind rivets when they are not installed. The base, rivet placement block, and auxiliary sleeve are designed as separate units, allowing for the replacement of the corresponding rivet placement block according to different models and specifications of aluminum alloy blind rivets. The structure is simple, easy to use, and highly versatile. When used with a testing machine, it can detect the pushing force of aluminum alloy blind rivets in their non-installed state and determine whether the rivets are qualified. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the base of this utility model;

[0012] Figure 3 This is a schematic diagram of the rivet placement block of this utility model;

[0013] Figure 4 This is a schematic diagram of the auxiliary sleeve of this utility model;

[0014] Figure 5 This is a schematic diagram of an aluminum alloy blind rivet.

[0015] In the diagram: 1-base, 2-rivet placement block, 3-auxiliary sleeve, 4-aluminum alloy blind rivet, 11-first through hole, 12-second through hole, 21-third through hole, 31-fourth through hole, 32-fifth through hole, 41-core rod, 42-rivet sleeve, 43-rivet head. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Implementation, for example, attached Figures 1 to 5As shown: A tooling for detecting the pushing force of an aluminum alloy blind rivet in its non-installed state includes a base 1, a rivet placement block 2, and an auxiliary sleeve 3. The base 1 has a first through hole 11 and a second through hole 12 arranged vertically from top to bottom, with the diameter of the first through hole 11 being larger than the diameter of the second through hole 12. The rivet placement block 2 is placed at the first through hole 11 and has a third through hole 21 for positioning the rivet sleeve 42 of the aluminum alloy blind rivet 4. The auxiliary sleeve 3 is placed above the rivet placement block 2 to position the core rod 41 of the aluminum alloy blind rivet 4. The auxiliary sleeve 3 has a fourth through hole arranged coaxially from top to bottom. Hole 31 and fifth through hole 32, the diameter of the fifth through hole 32 is larger than the diameter of the fourth through hole 31. The fifth through hole 32 can accommodate the nail head 43 on the nail sleeve 42, and the fourth through hole 31 can accommodate the core rod 41 of the aluminum alloy blind rivet 4. The height of the auxiliary sleeve 3 is less than the length of the part of the core rod 41 that protrudes from the nail sleeve 42, so that when the aluminum alloy blind rivet 4 is installed in the tooling, the upper part of the core rod 41 protrudes from the upper end face of the auxiliary sleeve 3 to facilitate the application of pressure to it. Since the aluminum alloy blind rivet 4 is in the non-installed state, the core rod 41 is too long. The auxiliary sleeve 3 can be set to position the core rod 41 and prevent the core rod 41 from bending and deforming during testing.

[0018] The thickness of the rivet placement block 2 is greater than the height of the first through hole 11. When the rivet placement block 2 is installed in the first through hole 11, it protrudes from the upper surface of the base 1, making it convenient to replace the rivet placement block 2. The third through hole 21 is a tapered countersunk hole, and the upper part of the third through hole 21 is tapered, making it easier for the rivet sleeve 42 to enter the third through hole 21 when placing the aluminum alloy blind rivet 4. The rivet placement block 2 is clearance-fitted with the first through hole 11 of the base 1, ensuring that the rivet placement block 2 is placed stably and is easy to replace. The third through hole 21 of the rivet placement block 2 is clearance-fitted with the aluminum alloy blind rivet 4. The diameter of the third through hole 21 is smaller than the diameter of the rivet head 43 of the aluminum alloy blind rivet 4, ensuring that the aluminum alloy blind rivet 4 is vertically upward.

[0019] The specific implementation process is as follows:

[0020] A compression testing machine can be used for testing. During use, the base 1 is installed on the worktable of the compression testing machine. A rivet placement block 2, corresponding to the model and specifications of the aluminum alloy blind rivet 4 to be tested, is placed in the first through hole 11 of the base 1. At this time, the base 1 supports the rivet placement block 2. The aluminum alloy blind rivet 4 is then placed into the third through hole 21 of the rivet placement block 2, with the core rod 41 of the aluminum alloy blind rivet 4 facing upwards, the rivet sleeve 42 located inside the third through hole 21, and the rivet head 43 located at the upper end of the rivet placement block 2. Next, an auxiliary sleeve 3 is fitted onto the core rod 41, so that the nail head 43 is located in the fifth through hole 32 of the auxiliary sleeve 3. The upper part of the core rod 41 protrudes above the fourth through hole 31. The compression test machine is started to apply pressure to the core rod 41 until the core rod 41 comes out of the nail sleeve 42. The pressure when it comes out is recorded, which is the pushing force of the aluminum alloy blind rivet 4 in the non-installed state. This tooling structure is simple and easy to use. The corresponding rivet placement block 2 can be replaced according to different models and specifications of aluminum alloy blind rivets 4, which has strong versatility.

[0021] 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 tool for detecting the push-out force of an aluminum alloy blind rivet in a non-installed state, characterized by: The rivet placement block is installed in the first through hole and protrudes from the upper end surface of the base.

2. The tool for detecting the push-out force of the aluminum alloy blind rivet in the non-installed state according to claim 1, characterized in that: The third through hole is a tapered counterbore, and the upper part of the third through hole is tapered.

3. The tool for testing the extraction force of an aluminum alloy blind rivet in an uninstalled state according to claim 1, characterized in that: The third through hole of the rivet placement block is clearance fit with the aluminum alloy blind rivet, and the diameter of the third through hole is smaller than the diameter of the rivet cap of the aluminum alloy blind rivet.

4. The tool for testing the extraction force of an aluminum alloy blind rivet in an uninstalled state according to claim 1, characterized in that: The third through hole of the rivet placement block is clearance fit with the aluminum alloy blind rivet, and the diameter of the third through hole is smaller than the diameter of the rivet cap of the aluminum alloy blind rivet.

5. The tool for testing the push-out force of an aluminum alloy blind rivet in an uninstalled state according to claim 1, characterized in that: ​

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