A tool for detecting product mounting force

Abstract

The utility model relates to core pull rivet detection technical field, concretely is a kind of tooling for detecting product installation force, including sleeve, interlayer board and sleeve pipe, the interlayer board is detachably housed in the inside of sleeve, the interlayer board center is equipped with counterbore, the small diameter section of counterbore is passed through for the core stem of core pull rivet, annular step surface formed by large diameter section is used to support the nail sleeve end of core pull rivet;The sleeve pipe is detachably connected in the lower end of sleeve, the center of sleeve pipe is equipped with through-hole for the core stem passing, the upper end surface of sleeve pipe is used to abut with the moving washer of core pull rivet when detecting. This tooling is adapted to different specifications of core pull rivet by replaceable interlayer board and sleeve pipe, solve the problem that the generality of detection tooling is poor, replacement is complicated in prior art, with the advantages of reliable positioning, high detection accuracy, low use cost.

Description

Technical Field

[0001] This utility model relates to the field of core-pulling rivet testing technology, specifically a tooling for testing the installation force of a product. Background Technology

[0002] In aerospace manufacturing, titanium alloy blind rivets are crucial high-end fasteners, primarily composed of four parts: the mandrel, the sleeve, the locking ring, and the sliding washer. Each part withstands different forces, so applying the appropriate installation force is essential for optimal riveting. Insufficient installation force can cause the sliding washer to break before shearing the mandrel, resulting in the locking ring failing to be pushed into the sleeve head groove. Conversely, excessive installation force can pull a significant portion of the mandrel out of the sleeve. Both excessive and insufficient installation forces can lead to substandard riveting, severely impacting the final product. To avoid these problems, a tooling system in conjunction with a tensile testing machine is urgently needed to effectively test the force each component of the blind rivet can withstand and determine the optimal installation force for final riveting.

[0003] Currently, the tooling used for testing rivet quality mainly targets properties such as core breaking force, clamping force, shear force, and core holding force. However, while testing these properties, it cannot obtain the force values ​​of each component of the blind rivet. For example, patent CN223179675U describes a tooling for testing the core rod ejection force of a blind rivet, which tests the ejection force. Before using this tooling for performance testing, the blind rivet needs to be riveted first, and it can only obtain the ejection force value. However, the lengths of blind rivets vary greatly, so new tooling is needed to match the corresponding sizes of blind rivets. This makes the testing process cumbersome, affects testing efficiency, and also increases the cost of tooling molds. Therefore, there is an urgent need for a dedicated tooling that is simple to operate and has wide adaptability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tooling for testing the installation force of products. It solves the problem that existing technologies require new tooling to adapt to different sizes of blind rivets when testing the force of blind rivets, resulting in narrow applicability. This solution only requires replacing a sandwich plate and a sleeve to test the force of blind rivets of different sizes.

[0005] To solve the above problems, the technical solution adopted by this utility model is: a tooling for testing the installation force of a product, including a sleeve (1), a sandwich plate (2) and a sleeve (3). The sandwich plate (2) is detachably housed inside the sleeve (1). The sandwich plate (2) has a countersunk hole in the center. The small diameter section of the countersunk hole is for the core rod of the pop rivet to pass through, and the annular stepped surface formed by the large diameter section is used to support the end of the pop rivet sleeve. The sleeve (3) is detachably connected to the lower end of the sleeve (1). The center of the sleeve (3) has a through hole for the core rod to pass through. The upper end face of the sleeve (3) is used to abut against the moving washer of the pop rivet during testing.

[0006] Furthermore, the inner wall of the sleeve (1) and the outer wall of the sandwich plate (2) are in clearance fit.

[0007] Furthermore, the lower end face of the sleeve (1) is provided with an internal thread, and the upper end of the sleeve (3) is provided with a matching external thread, so as to realize the detachable connection between the sleeve (1) and the sleeve (3).

[0008] Furthermore, the sandwich plate (2) and the sleeve (3) are replaceable parts, and by replacing the sandwich plate (2) and the sleeve (3) with different hole diameters or heights, they can be adapted to different specifications of blind rivets.

[0009] Furthermore, the sleeve (1), the sandwich plate (2), and the tube (3) are all made of high-strength alloy steel.

[0010] Compared with existing technologies, the beneficial effects of this solution are:

[0011] 1. High detection accuracy: Through the coordinated positioning of the sleeve, tube and sandwich plate, the titanium alloy core-pulling rivet is fixed in multiple directions, avoiding the movement of parts or the displacement of force during the detection process, effectively eliminating the interference of external factors, and ensuring that the installation force detection data is accurate and reliable.

[0012] 2. High adaptability: By simply changing the sandwich panel and sleeve of different specifications, it can adapt to the inspection needs of titanium alloy blind rivets of different lengths and outer diameters. There is no need to change the entire set of tooling, which reduces the inspection cost and improves the utilization rate of equipment.

[0013] 3. Easy to operate: The tooling adopts a threaded connection, which makes assembly and disassembly quick and easy. Operators can easily complete the tooling adjustment and product clamping, greatly improving the testing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the tooling used in the inspection process of this utility model;

[0015] Figure 2 This is a schematic diagram of the sleeve of this utility model;

[0016] Figure 3 This is a schematic diagram of the sandwich panel of this utility model;

[0017] Figure 4 This is a schematic diagram of the sleeve of this utility model;

[0018] Figure 5 This is a schematic diagram of the core-pulling rivet structure to be tested according to this utility model.

[0019] In the diagram: 1-sleeve, 2-jacketed plate, 3-tube sleeve. Detailed Implementation

[0020] 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.

[0021] like Figure 5 As shown, the pop rivet to be tested includes a core rod, a sleeve, a locking ring, and a movable washer. By applying tension to the tail of the core rod, the sleeve deforms to form an upset head. Under the action of force, the movable washer shears and pushes the locking ring into the groove at the end of the sleeve. Continuing to apply tension to the core rod causes it to break at the breakage groove.

[0022] Implementation, for example, attached Figure 1-4 As shown: This embodiment is a tooling for detecting the installation force of a product, including a sleeve 1, a sandwich plate 2 and a sleeve 3. The sandwich plate 2 is detachably housed inside the sleeve 1, and the sleeve 3 is detachably connected to the lower end of the sleeve 1.

[0023] Sleeve 1 is a cylindrical structure with openings at the top and bottom, serving as the overall support component of the tooling. The inner wall of sleeve 1 is adapted to the outer wall of sandwich plate 2 for embedding sandwich plate 2. The lower end face of sleeve 1 has an internal thread for connecting with sleeve 3. The upper end of sleeve 3 has an external thread adapted to the internal thread of sleeve 1. It can be detachably fixed below sleeve 1 through threaded connection, facilitating quick installation and replacement of sleeve 3. Different sizes of sleeve 3 can be replaced with different sizes of blind rivets.

[0024] The sandwich plate 2 has a countersunk hole at its center for a titanium alloy blind rivet to pass through. The small-diameter section of the countersunk hole allows the core rod of the blind rivet to pass through, while the large-diameter section forms an annular stepped surface to support the end of the blind rivet's sleeve. The axis of the countersunk hole is collinear with the axis of the sleeve 1, thus positioning the blind rivet's sleeve and ensuring stable force direction for the rivet. The sleeve 1 has a stepped surface inside, and the outer wall of the sandwich plate 2 is clearance-fitted with the inner wall of the sleeve 1, facilitating the sliding insertion of the sandwich plate 2 into the sleeve 1 and enabling quick disassembly and replacement of the sandwich plate 2.

[0025] The sleeve 3 has a through hole in the center for the core rod of the pull rivet to pass through. The upper end face of the sleeve 3 is used to abut against the moving washer of the pull rivet during testing, so that the moving washer can shear and push the locking ring into the rivet sleeve during testing.

[0026] In this design, sleeve 1, sandwich plate 2, and sleeve 3 are all made of high-strength alloy steel, possessing sufficiently high toughness, good tensile strength, and weldability. Sandwich plate 2 and sleeve 3 are replaceable components; by replacing sandwich plates 2 and sleeves 3 with different bore diameters or heights, different sizes of blind rivets can be accommodated.

[0027] Working principle:

[0028] 1. Adaptation and adjustment: Select sandwich plate 2 and sleeve 3 with matching hole diameter and height according to the specifications of the titanium alloy blind rivet to be tested.

[0029] 2. Tooling assembly: Pass the titanium alloy blind rivet to be tested through the countersunk hole of the sandwich plate 2, then slide the sandwich plate 2 into the sleeve 1, pass the end of the blind rivet rod through the through hole of the sleeve 3, so that the moving washer abuts against the upper end face of the sleeve 3, and fix the sleeve 3 to the lower end of the sleeve 1 by threaded connection, thus completing the assembly of the tooling and the product.

[0030] 3. Testing operation: Place the assembled fixture on the test machine's worktable, clamp the tail of the titanium alloy blind rivet using the test machine's clamping fixture, and slowly apply tension.

[0031] 4. Data Acquisition: Under tension, the rivet sleeve gradually deforms to form an upsetting head. After the moving washer shears, it pushes the locking ring into the groove at the head of the rivet sleeve until the core rod breaks at the breakage groove. The testing machine records the force changes throughout the process, and the maximum force value obtained is the product installation force. At the same time, the force data of each key step (upsetting head formation, locking ring push-in, core rod breakage) can be obtained.

[0032] This utility model tooling can be quickly adapted to the inspection of titanium alloy blind rivets of different specifications. It is easy to operate and provides accurate data, effectively solving the inspection problems in the existing technology. It has significant practical value and promotion value.

[0033] 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 tooling for detecting the installation force of a product, characterized in that: It includes a sleeve (1), a sandwich plate (2), and a sleeve (3); the sandwich plate (2) is detachably housed inside the sleeve (1), and the sandwich plate (2) has a countersunk hole in the center. The small diameter section of the countersunk hole is for the core rod of the pop rivet to pass through, and the annular stepped surface formed by the large diameter section is used to support the end of the pop rivet sleeve; the sleeve (3) is detachably connected to the lower end of the sleeve (1), and the center of the sleeve (3) has a through hole for the core rod to pass through. The upper end face of the sleeve (3) is used to abut against the moving washer of the pop rivet during testing.

2. The tooling for detecting product installation force according to claim 1, characterized in that: The inner wall of the sleeve (1) and the outer wall of the sandwich plate (2) are in clearance fit.

3. The tooling for detecting product installation force according to claim 1, characterized in that: The lower end face of the sleeve (1) is provided with an internal thread, and the upper end of the sleeve (3) is provided with a matching external thread, so as to realize the detachable connection between the sleeve (1) and the sleeve (3).

4. The tooling for detecting product installation force according to claim 1, characterized in that: The sandwich plate (2) and the sleeve (3) are replaceable parts. By replacing the sandwich plate (2) and the sleeve (3) with different hole diameters or heights, different sizes of blind rivets can be accommodated.

5. The tooling for detecting product installation force according to claim 1, characterized in that: The sleeve (1), sandwich plate (2) and sleeve (3) are all made of high-strength alloy steel.

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