A single-sided installation threaded type pull-out rivet installation plate dismounting device

Abstract

The utility model discloses a single -sided installation thread type draws the riveting installation board dismounting device, including base, box cover, top rod bolt, shearing plate and locating block, be equipped with installation groove, sliding slot and waste mouth in base, the sliding slot sets up one side in the installation groove, and the waste mouth is linked together with the sliding slot, and the shearing plate sets up in the sliding slot inside, is provided with the shearing hole on the shearing plate, and the locating block is close to installation in the shearing plate far from the sliding slot one side, and the locating block is provided with the locating hole corresponding with the shearing hole, and the locating block installs the installation board after riveting is completed, and the box cover is connected with the base through the bolt, is provided with the internal thread hole on the base, and the top rod bolt matching is installed in the internal thread hole. The present application can be disassembled under the laboratory condition, does not need to use cutting, drilling and other methods to disassemble, and the disassembly work efficiency is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of disassembly technology for single-sided threaded tapped riveting mounting plates, specifically to a disassembly device for single-sided threaded tapped riveting mounting plates. Background Technology

[0002] In modern industrial fields such as aerospace, high-speed trains, automobile manufacturing, and high-end electronic equipment, single-sided threaded rivets are widely used to achieve lightweight, high-strength, and high-reliability connections. A typical structure of this type of rivet includes a rivet sleeve, a mandrel, an insert, and a drive nut. Typically, installation testing involves riveting it to a mounting plate, with one mounting plate capable of riveting nine or more samples. A specialized riveting gun is used for installation of single-sided threaded rivets. The drive head of the riveting gun engages with the mandrel of the rivet, ensuring that the axis of the riveting gun is aligned with the axis of the rivet. After starting the riveting gun, the applied torque causes the mandrel to rotate counterclockwise. Due to the locking structure on the drive nut, the mandrel and drive nut are gradually tightened together. Continued rotation of the mandrel generates tension that eliminates assembly gaps between the connected components. Under this continuous pressure, the rivet sleeve is upset, ultimately forming a head on the back of the structure that meets design requirements, thus securely clamping the connected components.

[0003] Therefore, after the riveting test, the drive nut with the locking structure is tightened into the mandrel. When disassembling the single-sided threaded pull pin, sufficient torque is required to overcome the locking torque. Furthermore, because the mandrel breaks at the predetermined break groove, the clamping device of the torque wrench or torque testing machine cannot hold it. In a laboratory environment, disassembly cannot be completed quickly; mechanical cutting or drilling is the only option, which is inefficient, time-consuming, and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a single-sided threaded riveted mounting plate disassembly device. This device can quickly and efficiently disassemble the mounting plate in a laboratory environment. It eliminates the limitations of existing technologies that rely solely on drilling and cutting methods, significantly improving disassembly efficiency.

[0005] The technical solution of this utility model: A disassembly device for a single-sided threaded tapped riveting mounting plate includes a base, a cover, a top bolt, a shearing plate, and a positioning block. The base has an installation groove, a sliding groove, and a waste outlet. The sliding groove is located on one side of the installation groove, and the waste outlet communicates with the sliding groove. The shearing plate is located inside the sliding groove and has shearing holes. The positioning block is installed close to the side of the shearing plate away from the sliding groove and has positioning holes corresponding to the shearing holes. The riveted mounting plate is installed on the positioning block. The cover is connected to the base by bolts. The base has internal threaded holes, and the top bolt is installed in the internal threaded holes.

[0006] The lid is also provided with mounting holes to facilitate the connection of the lid to the base by bolts.

[0007] The shearing holes are arranged in three rows, and the three rows of shearing holes are arranged sequentially from top to bottom.

[0008] There is at least one shear hole in each row.

[0009] The shearing holes in the first row are circular holes with a diameter of d, while the shearing holes in the second and third rows are dumbbell-shaped structures.

[0010] The shearing holes in the second row are semi-circular structures with a diameter of d at both ends, and a rectangular channel structure with a length of 2d and a width of d in the middle. The shearing holes in the third row are semi-circular structures with a diameter of d at both ends, and a rectangular channel structure with a length of 3d and a width of d in the middle. Here, d is the diameter of the upset part of the single-sided threaded pull pin to be disassembled.

[0011] The positioning hole has a tapered structure. The diameter of the small hole of the tapered structure is the same as the outer dimension of the drive nut of the single-sided threaded pull pin. The diameter of the large hole of the tapered structure is not less than the maximum diameter of the pin sleeve after the single-sided threaded pull pin is upset after riveting.

[0012] The head of the top bolt is round.

[0013] The beneficial effects of this utility model are: This application applies to the disassembly of single-sided threaded rivet mounting plates, enabling disassembly under laboratory conditions without the need for outsourcing disassembly using cutting, drilling, or other methods. This significantly improves disassembly efficiency and saves on testing and labor costs. The design of the shearing edge in the shearing plate differs from existing technologies where the sample is sheared along a single predetermined plane. Instead, it is designed based on the number and position of the mounting holes on the mounting plate, creating multiple shearing surfaces. This allows for the simultaneous shearing of three riveted single-sided threaded rivets on a parallel plane. Compared to existing technologies, the shearing edge on the shearing plate is designed from an outer edge to a central edge, adopting a design concept from a "cantilever beam" to a "simply supported beam." This structurally improves stress distribution, enabling the tool to withstand higher loads and longer cycle times, avoiding stress concentration caused by outer edge designs and preventing re-breakage. Designing the shearing edge inside the shearing plate also involves a readjustment of the overall tool weight, helping to lower the tool's center of gravity, reduce inertial torque, and improve operational stability. Furthermore, it effectively reduces stroke, idle stroke, and energy loss, thus improving work efficiency. Secondly, the design of the top rod bolt avoids the need to design clamping tools of different thicknesses for mounting plates of different thicknesses in the existing technology. This invention is applicable to the disassembly of mounting plates of all thicknesses, reducing the design and waste of clamping tools. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the base of this utility model; Figure 3 This is a structural schematic diagram of the box lid of this utility model; Figure 4 This is a schematic diagram of the structure of the shearing plate of this utility model; Figure 5 This is a schematic diagram of the positioning block of this utility model; Figure 6 This is a schematic diagram of the top rod bolt of this utility model.

[0015] Attached reference numerals: 1-base, 2-box cover, 3-top rod bolt, 4-shearing plate, 5-positioning block, 6-mounting plate, 7-slide groove, 8-waste port, 9-mounting hole, 10-internal threaded hole, 11-shearing hole, 12-positioning hole. Detailed Implementation

[0016] refer to Figures 1-6A disassembly device for a single-sided threaded riveting mounting plate includes a base 1, a cover 2, a top bolt 3, a shearing plate 4, and a positioning block 5. The base 1 has an installation groove, a sliding groove 7, and a waste outlet 8. The sliding groove 7 is located on one side of the installation groove, and the waste outlet 8 communicates with the sliding groove 7. The shearing plate 4 is located inside the sliding groove 7 and has a shearing hole 11. The positioning block 5 is installed close to the side of the shearing plate 4 away from the sliding groove 7 and has a positioning hole 12 corresponding to the shearing hole 11. The riveted mounting plate 6 is installed on the positioning block 5. The cover 2 is connected to the base 1 by bolts. The base 1 has an internal threaded hole 10, and the top bolt 3 is installed in the internal threaded hole 10.

[0017] The groove 7 is mainly for facilitating the installation of the shearing plate 4. During installation, the width of the groove 7 matches the thickness of the shearing plate 4. The waste outlet 8 provides a drop channel for waste generated during the first, second, and third shearing processes, ensuring timely waste removal and reducing the risk of waste retention and adhesion. This effectively prevents waste from scratching or indenting the inner surface of the device proposed in this application. Specifically, the shearing plate 4 is installed in the groove 7 of the base 1, and waste generated during disassembly is discharged through the waste outlet 8 of the base 1.

[0018] In this application, the internal thread size of the internal thread hole 10 matches the external thread size of the push rod bolt 3. A continuous axial force is generated by the external thread flank of the push rod bolt 3 and the internal thread flank of the internal thread hole 10, thereby applying a preload between the cover 2 and the base 1, and between the cover 2 and the push rod bolt 3, to achieve the purpose of fastening.

[0019] The box cover 2 is also provided with mounting holes 9 to facilitate the connection of the box cover 2 and the base 1 by bolts.

[0020] The shearing holes 11 are arranged in three rows, and the three rows of shearing holes 11 are arranged sequentially from top to bottom. This arrangement facilitates layered shearing.

[0021] There is at least one shearing hole 11 in each row. This arrangement facilitates the simultaneous cutting of multiple riveted rivets.

[0022] The shearing holes 11 in the first row are circular holes with a diameter of d, while the shearing holes 11 in the second and third rows are dumbbell-shaped structures.

[0023] The shearing holes 11 in the second row are semi-circular structures with a diameter of d at both the top and bottom, and a rectangular channel structure with a length of 2d and a width of d in the middle. The shearing holes 11 in the third row are semi-circular structures with a diameter of d at both the top and bottom, and a rectangular channel structure with a length of 3d and a width of d in the middle. Here, d is the diameter of the upset part of the single-sided threaded pull pin to be disassembled.

[0024] Specifically, the shearing plate 4 is designed with three rows of shearing holes 11. The first row of shearing holes 11 is designed as round holes, with a diameter d based on the diameter of the upset portion of the single-sided threaded pull pin to be disassembled. The second and third rows of shearing holes 11 are not simple round holes, but have a special "dumbbell-shaped" structure. The shape of the second row of shearing holes 11 is a semicircle with a diameter of d at both ends, and a rectangular channel with a length of 2d and a width of d in the middle. The shape of the third row of shearing holes 11 is a semicircle with a diameter of d at both ends, and a rectangular channel with a length of 3d and a width of d in the middle. The round holes of the first row of shearing holes 11 and the semicircular portions of the second and third rows of shearing holes 11 together constitute the shearing edge. First, the diameter of the round holes matches the diameter of the sample, ensuring that each row of samples can obtain precise support and constraint in the X and Y axes when subjected to shearing force, and will not move, deflect, or bend during the shearing process, thereby ensuring a flat and vertical sheared section, which facilitates subsequent disassembly work. Secondly, the sequential shearing design avoids the situation where, when the punch is pressed down, the sample on the mounting plate is compressed as a whole, and the sample mounted on the outer ring is affected by the squeezing of the central sample and its own bending tendency, causing it to expand radially and generate huge frictional resistance, resulting in a sharp increase in the required shearing force, or even the inability to shear.

[0025] The positioning hole 12 has a conical structure. The diameter of the small hole of the conical structure is the same as the outer dimension of the drive nut of the single-sided threaded pull pin. The diameter of the large hole of the conical structure is not less than the maximum diameter of the pin sleeve after the single-sided threaded pull pin is upset after riveting.

[0026] Specifically, the positioning hole 12 is designed in a conical shape. The diameter of the small conical hole is designed according to the outer dimensions of the drive nut of the single-sided threaded rivet, with a tolerance of +0.2. This serves as the main positioning reference, ensuring that the axis of the single-sided threaded rivet after riveting is aligned with the axis of the positioning hole 12. Secondly, it ensures that the entire drive nut can pass through the positioning block 5, ensuring that the shearing position is on the rivet sleeve or at the connection between the rivet sleeve and the drive nut. The diameter of the large conical hole is greater than or equal to the maximum diameter of the rivet sleeve after upsetting the single-sided threaded rivet, forming a guide cone surface that guides the riveted single-sided threaded rivet smoothly into and accommodates the upset rivet sleeve.

[0027] The head of the push rod bolt 3 is round-headed. That is, the push rod bolt 3 is a fully threaded bolt with a round head for easy operation. The external thread size of the push rod bolt 3 matches the internal thread size of the internal thread hole 10. Secondly, it ensures sufficient contact area with the mounting plate 6 to prevent the mounting plate 6 from shifting during the shearing process.

[0028] The method of using the disassembly device of this application includes the following steps: S1: Mounting plate assembly: Assemble the mounting plate 6 and positioning block 5 after riveting, and determine the shearing position after riveting the single-sided threaded pull pin on the pin sleeve or at the connection between the drive nut and the pin sleeve. S2: Shear plate assembly. After completing step S1, install the shear plate 4, and then place the assembled mounting plate 6, positioning block 5 and shear plate 4 in the base 1. The shear plate 4 is placed in the slide groove 7 in the base 1, and the mounting plate 6 and positioning block 5 are located in the mounting groove. S3: Fix the mounting plate. After completing step S2, tighten the top rod bolts 3 on the box cover 2 to fix the mounting plate 6. S4: Specimen shearing. After completing step S3, place the disassembly device with the mounting plate 6 fixed on the base of the electronic universal testing machine, start the test program of the electronic universal testing machine, move the crossbeam of the electronic universal testing machine downward, so that the pressure plate of the electronic universal testing machine applies a vertical downward shearing force to the shearing plate 4 to shear the specimen. After shearing, take out the mounting plate 6, manually remove the remaining core rod and nail sleeve, and complete the disassembly of the single-sided threaded riveting mounting plate.

[0029] In step S4, the riveted rivets in rows 1, 2, and 3 are cut sequentially. Specifically, in use, assemble the riveted mounting plate 5 with the positioning block 6, determine the shearing position after riveting the single-sided threaded rivets to be on the rivet sleeve or at the connection between the drive nut and the rivet sleeve, install the shearing plate 4, and then place the assembled mounting plate 6, positioning block 5, and shearing plate 4 in the base 1. The shearing plate 4 is placed in the slide groove 7 in the base 1, and the top rod bolt 3 is tightened to fix the mounting plate. Then, place it on an electronic universal testing machine. The testing machine punch applies a vertical downward shearing force to the shearing plate 4. At this time, the shearing plate moves in the slide groove of the base, completing the shearing of the first row of riveted single-sided threaded rivets. As the compressive load on the testing machine continues to be output, the shearing of the second and third rows is completed successively. The waste generated by shearing is discharged from the waste port 8 of the base 1. After shearing is completed, remove the mounting plate 6, and the remaining core rod and rivet sleeve can be removed manually, thus completing the disassembly of the single-sided threaded rivet riveting mounting plate.

[0030] In this application, the electronic universal testing machine is a high-precision material mechanical property testing device that uses motor drive, sensor technology and computer control. The model is UTM5305HB. It is called "universal" because by changing different fixtures and accessories, it can perform various types of mechanical tests, such as tension, compression, bending, shearing, tearing and peeling. It is widely used in the quality control and scientific research of various materials.

[0031] The electronic universal testing machine mainly consists of the following parts. 1. Host Framework: Base and crossbeams: These form the rigid main body of the equipment. The positions of the upper and lower crossbeams are usually fixed or adjustable.

[0032] Ball screw: The core transmission component. The rotational motion of the motor is converted into precise linear motion of the beam through the screw. There are usually two structures: single screw (threshold type) and double screw (gate type), with the double screw offering better stability.

[0033] 2. Drive system: Servo motor: Provides power to the equipment. The control system allows for precise control of the crossbeam's movement speed and position.

[0034] 3. Force measuring system: Load cell: equivalent to the "scale" of the testing machine. It is used to accurately measure the force exerted on the sample during testing. Depending on the range of the test force, different range sensors need to be selected.

[0035] 4. Displacement measurement system: This is used to measure the distance the beam moves (i.e., the amount of deformation of the specimen). It is typically achieved by an encoder built into the motor. For deformation measurements requiring higher precision (such as extensometers), additional accessories are needed.

[0036] 5. Control system: It is the brain of the testing machine. It receives user commands (such as speed, target force value, etc.) and precisely controls the operation of the motor.

[0037] 6. Fixtures and accessories: Fixtures: Used to hold or fix specimens, such as wedge clamps (for tensile testing of metals), compression clamps, bending clamps, etc. Fixtures are key to "universal" testing.

[0038] Extensometer: It is clamped directly onto the specimen and used to measure the minute deformation (strain) of the specimen during the test with high precision. It is a key device for obtaining parameters such as the elastic modulus of materials.

[0039] Safety features: emergency stop button, protective cover, etc., to ensure safe operation.

[0040] 7. Computers and Software: The core of a modern testing machine is its software, which is used to set test parameters, display the force-displacement / deformation curve in real time, automatically calculate test results (such as strength, yield point, elastic modulus, etc.), generate test reports, and store data.

[0041] Working principle of electronic universal testing machine 1. The user installs the sample between the upper and lower clamps.

[0042] 2. Set parameters such as test type (e.g., stretching), speed, and stopping conditions using computer software.

[0043] 3. Start the test. The control system drives the servo motor, which in turn drives the lead screw to move the crossbeam at a set speed, thereby applying force to the sample.

[0044] 4. The load sensor detects the force applied to the specimen in real time, and the displacement measurement system detects the displacement of the crossbeam in real time (or the extensometer detects the actual deformation of the specimen).

[0045] 5. Computer software synchronously collects force and displacement / deformation data and plots them as curves in real time.

[0046] 6. After the test is completed (e.g., the specimen breaks, the set force value is reached), the software automatically analyzes the data according to the preset algorithm, calculates the required material mechanical property indexes, and generates a test report.

Claims

1. A disassembly device for a single-sided threaded tapped riveting mounting plate, characterized in that... The device includes a base (1), a cover (2), a top rod bolt (3), a shearing plate (4), and a positioning block (5). The base (1) has an installation groove, a sliding groove (7), and a waste port (8). The sliding groove (7) is located on one side of the installation groove, and the waste port (8) is connected to the sliding groove (7). The shearing plate (4) is located inside the sliding groove (7), and the shearing plate (4) has a shearing hole (11). The positioning block (5) is installed close to the side of the shearing plate (4) away from the sliding groove (7). The positioning block (5) has a positioning hole (12) corresponding to the shearing hole (11). The installation plate (6) after riveting is installed on the positioning block (5). The cover (2) is connected to the base (1) by bolts. The base (1) has an internal thread hole (10), and the top rod bolt (3) is installed in the internal thread hole (10).

2. The single-sided threaded riveting mounting plate disassembly device according to claim 1, characterized in that: The box cover (2) is also provided with mounting holes (9) to facilitate the connection of the box cover (2) and the base (1) by bolts.

3. The single-sided threaded tap riveting mounting plate disassembly device according to claim 1, characterized in that: The shearing holes (11) are arranged in three rows, and the three rows of shearing holes (11) are arranged sequentially from top to bottom.

4. The single-sided threaded riveting mounting plate disassembly device according to claim 3, characterized in that: There is at least one shear hole (11) in each row.

5. The single-sided threaded riveting mounting plate disassembly device according to claim 3, characterized in that: The shearing holes (11) in the first row are circular holes with a diameter of d, while the shearing holes (11) in the second and third rows are dumbbell-shaped structures.

6. The single-sided threaded riveting mounting plate disassembly device according to claim 5, characterized in that: The shearing holes (11) in the second row are semi-circular structures with a diameter of d at both the top and bottom, and a rectangular channel structure with a length of 2d and a width of d in the middle. The shearing holes (11) in the third row are semi-circular structures with a diameter of d at both the top and bottom, and a rectangular channel structure with a length of 3d and a width of d in the middle. Here, d is the diameter of the upset part of the single-sided threaded pull pin to be disassembled.

7. The single-sided threaded tap riveting mounting plate disassembly device according to claim 1, characterized in that: The positioning hole (12) is a conical structure. The diameter of the small hole of the conical structure is the outer dimension of the drive nut of the single-sided threaded pull pin. The diameter of the large hole of the conical structure is not less than the maximum diameter of the nail sleeve after the single-sided threaded pull pin is upset after riveting.

8. The single-sided threaded riveting mounting plate disassembly device according to claim 1, characterized in that: The head of the top bolt (3) is a round head structure.

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