High-shear-resistance self-plugging rivet removing device

Abstract

The utility model belongs to the aviation riveting assembly technology, and particularly relates to a high-shear-resistance self-plugging rivet dismantling device. A self-plugging rivet with high shear strength is often installed at a non-open position of an airplane, and is difficult to disassemble in the assembly process. The utility model provides a high-shear-resistance self-plugging rivet dismantling device applied to different assembling scenes, which can select an adaptive structure and a matching tool from the set of tools according to the specific assembling position of a high-shear-resistance self-plugging rivet to be dismantled on a machine body structure. And the assembled countersunk head high-shear-resistance self-plugging rivet with narrow circumferential or axial operation space can be disassembled. The device can avoid damage to the hole wall of the connecting piece, can be flexibly applied to various scenes and is wide in application range; the structure is exquisite and simple, the industrial processing difficulty is low, and the device is highly suitable for industrial production. The mechanism is designed to be matched with a ratchet wrench or an air drill for use, a power generation mechanism is simplified, and universal interchangeability is high.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace riveting and assembly technology, specifically involving a high shear-resistant core-pulling rivet removal device. Background Technology

[0002] ASNA008X series high shear strength blind rivets are widely used in aircraft load-bearing component connection joints, fuselage fuel tanks, and main fuselage frame beam cross-connection areas due to their advantages such as high shear strength, unidirectional riveting operation, and low requirements for the openness of the operating space.

[0003] Because of its low requirement for openness in operating space, the ASNA008X series is often installed in closed locations on aircraft, making disassembly during assembly very difficult.

[0004] The main approach of existing technologies is to design auxiliary tools above the rivet head in the axial direction of the rivet to locate the center of the rivet hole, and then use a pneumatic drill or a cutting mechanism to destroy the rivet structure. Based on research and investigation, three existing technologies are briefly introduced below:

[0005] 1) A device for disassembling a core-pulling rivet CN206122621U

[0006] The device includes a housing, a first drive mechanism, a cutter holder, and a blade. The technical solution is to drive the blade to rotate radially along the cutter holder via the drive mechanism, with a retracted position and an open position set in the radial direction, to cut the wall of the rivet shank hole until the rivet shank hole wall is severed, forcing the rivet to separate from the upper and lower parts, and then removing the rivet cap and the butt head from the base.

[0007] 2) A device for removing blind rivets and a method for disassembling them.

[0008] The technical solution involves limiting the stroke of the hollow drill bit through mechanisms such as a limiting block, limiting sleeve, fine-tuning sleeve, limiting washer, and inner sleeve stepped surface, so that it reaches a position that only disassembles the rivet head without damaging the structure. In conjunction with tools and equipment such as hollow drill bit, quick-change bushing, and pneumatic drill, the hollow drill bit is driven by the pneumatic drill to remove the rivet head, and then the rivet rod is punched out by tools such as hammer, concave top iron, fine punch, and coarse punch.

[0009] 3) Disassembly apparatus for hollow rivets and production system using the disassembly method CN1254635A

[0010] Cut the rivet shank from the direction of the vertical rivet axis, and use a moving device to link with the pressing device to make the pressing device enter the through hole and press out the remaining part along the rivet body axis. Summary of the Invention

[0011] This utility model proposes a high shear-resistant pop rivet removal device applicable to different assembly scenarios. It can select the appropriate structure and matching tools from the tool set according to the specific assembly position of the high shear-resistant pop rivet to be removed in the machine body structure, and remove the assembled countersunk high shear-resistant pop rivet where the circumferential or axial operating space is narrow.

[0012] This utility model proposes a high shear resistance core-pulling rivet removal device. The main body of the device is a handheld column with several radially inward protrusions at one end. The protrusions are evenly spaced and have a certain slope, and the inner end protrudes outward along the axial direction. The other end of the main body has a countersunk hole or an inner through hole. The countersunk hole is connected to a ratchet wrench, and the inner through hole is used for guiding a pneumatic drill.

[0013] Advantageously or alternatively, the countersunk hole is a standard square round hole.

[0014] Advantageously or alternatively, the size of the inner through hole is a secondary diameter relative to the pneumatic drill.

[0015] Advantageously or alternatively, the number of protrusions is four, orthogonally distributed.

[0016] Advantageously or alternatively, the protrusions include protrusion one, protrusion two, protrusion three and protrusion four.

[0017] Advantageously or alternatively, the protruding end engages with the grooved head of the high shear strength blind rivet.

[0018] Beneficial effects: This device can avoid damage to the hole wall of the connector, can be flexibly applied to various scenarios, and has a wide range of applications; moreover, it has a compact and simple structure, low industrial processing difficulty, and is highly suitable for industrial production.

[0019] The mechanism is designed to be used in conjunction with a ratchet wrench or pneumatic drill, simplifying the power generation mechanism and offering high versatility and interchangeability.

[0020] The features, functionalities, and advantages already discussed can be implemented independently in various examples, or combined in other examples. Further details of the examples can be seen in the following description and accompanying figures. Attached Figure Description

[0021] Figure 1 A top view of a high-shear-resistant blind rivet removal device;

[0022] Figure 2 Front view of the high shear-resistant blind rivet removal device;

[0023] Figure 3 A cross-sectional view of a high shear-resistant pop rivet removal device;

[0024] Figure 4 Bottom view of the high shear-resistant pop rivet removal device;

[0025] Figure 5 This is a sectional view of the bushing.

[0026] 01-Protrusion 1, 02-Protrusion 2, 03-Protrusion 3, 04-Protrusion 4, 05-Standard square round flower hole, 06-Internal through hole Detailed Implementation

[0027] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0028] Scenario 1: A vertical structure (rib, frame, beam, etc.) obstructs the axial space above a high-shear-resistant blind rivet. A ratchet wrench is selected as the reverse force source to remove the bolt by vertical axial operation. The design concept and principle are as follows:

[0029] 1) Utilizing the grooved head of a high-shear-strength blind rivet, and in conjunction with the groove's shape, the removal device is structurally designed with four protrusions (Protrusion 1 01, Protrusion 2 02, Protrusion 3 03, and Protrusion 4 04), see [reference]. Figure 1 Top view, used for positioning and engaging the pop rivet.

[0030] 2) Utilizing the threaded connection between the high-shear-strength blind rivet core and the external sleeve, and employing the reverse thread removal function of a ratchet wrench, a standard square-shaped perforated hole is provided at the bottom of the high-shear-strength blind rivet removal device for use with a ratchet wrench to simplify the mechanism and increase versatility. (See [link]). Figure 2-4 The removal device has a standard square-shaped hole at the bottom of the mechanism, which, together with a ratchet wrench, enables a linkage rotation function to loosen the core rod and the outer sleeve in the reverse direction.

[0031] The operation includes the following steps:

[0032] Step 1: Use four protrusions (protrusion 1 01, protrusion 2 02, protrusion 3 03, and protrusion 4 04) to locate the four recessed areas of the high shear-resistant pop rivet head.

[0033] Step 2: Install the ratchet wrench into the standard square round hole (05) at the bottom of the mechanism;

[0034] Step 3: Rotate the ratchet wrench handle. The force is transmitted through the four protrusions and the grooves of the rivet head. Twist the core rod in the opposite direction until the core rod separates from the rivet, thus completing the rivet removal.

[0035] Scenario 1 fully utilizes the characteristic that the internal threaded connection of the high shear-resistant pop rivet, and uses a ratchet wrench to loosen and remove it.

[0036] Scenario 2: The circumferential space for high-shear blind rivets is limited, or the circumferential area of ​​the blind rivet is obstructed by other structures, making access impossible. A small-diameter pneumatic drill is used to work vertically above the rivet axis to destroy its structure. The design concept and principle are as follows:

[0037] 1) Retain the four protrusions in the design structure of Scene 1 to match the shape of the groove. The dismantling device is designed with four protrusions in its structure (protrusion 1 01, protrusion 2 02, protrusion 3 03, and protrusion 4 04), which are only used for positioning.

[0038] 2) To ensure that destructive operations do not damage other nearby parts, an internal through hole (06) is designed to guide the pneumatic drill.

[0039] The operation includes the following steps:

[0040] Step 1: Use four protrusions (protrusion 1 01, protrusion 2 02, protrusion 3 03, and protrusion 4 04) to locate the four recessed areas of the high shear-resistant pop rivet head.

[0041] Step 2: Insert a pneumatic drill of the next smaller diameter into the inner through hole 06 to destroy the rivet structure.

[0042] Step 3: Remove the removal device and punch out any remaining rivets.

[0043] Scenario 2 uses an embedded guide sleeve to guide the drill bit, eliminating the risk of damage to the hole wall of the connecting parts, avoiding cost losses caused by part damage, and reducing the failure rate of industrial production.

[0044] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may be described as having different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical applications of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A high shear-resistant core-pulling rivet removal device, characterized in that: The main body of the device is a handheld column. At one end of the main body, there are several radially inward protrusions. Each protrusion is evenly spaced and has a certain slope. The inner end protrudes outward along the axial direction. At the other end of the main body, there is a countersunk hole or an inner through hole (06). The countersunk hole is connected to a ratchet wrench, and the inner through hole (06) is used for the pneumatic drill to be inserted.

2. The high shear resistance core-pulling rivet removal device according to claim 1, characterized in that: The countersunk hole is a standard square round flower hole (05).

3. The high shear resistance core-pulling rivet removal device according to claim 1, characterized in that: The size of the inner through hole (06) is a secondary diameter relative to the pneumatic drill.

4. The high shear resistance core-pulling rivet removal device according to claim 1, characterized in that: The number of protrusions is four, orthogonally distributed.

5. The high shear resistance core-pulling rivet removal device according to claim 4, characterized in that: The protrusions include protrusion one (01), protrusion two (02), protrusion three (03) and protrusion four (04).

6. The high shear resistance core-pulling rivet removal device according to claim 1, characterized in that: It has a raised end that mates with the grooved head of a high-shear-strength blind rivet.

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