Clamping device for welding repair of aircraft adapter

Abstract

The utility model provides a clamping device for welding repair of an aircraft adapter. The clamping device comprises a bottom plate, a supporting block, a top plate and a knurled positioning screw. The supporting block is fixed to one end of the top face of the bottom plate, and a positioning installation groove for a flange plate of an aircraft adapter is formed in the other end of the top face of the bottom plate. The top face of the supporting block is an inclined face, and the included angle between the inclined face and the horizontal plane is equal to the included angle between the threaded section of the aircraft adapter and the flange plate. One end of the top plate is fixedly connected with the top surface of the supporting block; the knurled positioning screw is vertically installed at the other end of the top plate and used for abutting against the end of the threaded section of the replaced adapter through screwing, reliable positioning and fixing of the threaded section and a flange plate of the adapter in the welding process are achieved, the dislocation risk is avoided, the adapter does not deform after welding, and the welding quality is high.

Description

Technical Field

[0001] This utility model belongs to the field of conduit clamp welding repair technology, specifically relating to a clamping device for welding repair of aircraft adapter joints. Background Technology

[0002] The adapter for a certain type of aircraft consists of a threaded section and a flange connected to the threaded section. The adapter connects to the aircraft's drain valve, and wear and tear occurs with prolonged use. During the repair of the aircraft adapter, maintenance personnel discovered two issues when disassembling the adapter and drain valve: first, the threads of the adapter and drain valve were seized, making it impossible to separate the adapter from the tee pipe; second, after disassembly, the adapter's threads were found to be misaligned and some threads were worn down, while other parts remained intact. Generally, aircraft maintenance uses a tandem approach, employing adapters from other aircraft to address urgent maintenance needs. However, this method may result in mismatched adapters, leading to unreliable connections with the drain valve. Furthermore, directly discarding adapters with damaged threads would be extremely wasteful. Therefore, it is necessary to repair the adapter's threads by welding.

[0003] Traditional welding repair methods involve manually positioning the remade threaded section and flange connection using technical experience. During welding, two clamping plates are used to hold the threaded section in place, and the position of the threaded section and clamping plates needs to be constantly adjusted. Since the clamping plates are not fixed during the welding process, misalignment may occur, posing a risk of welding deformation between the threaded section and the flange. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing aircraft adapter thread repair processes, which are characterized by unreliable clamping and welding deformation, and to provide a clamping device for aircraft adapter welding repair.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A clamping device for welding repair of an aircraft adapter joint, the aircraft adapter joint including a threaded section and a flange, wherein the threaded section is inclined relative to the flange; characterized in that the clamping device includes a base plate, a support block, a top plate and knurled positioning screws;

[0007] The support block is fixed to one end of the top surface of the base plate, and the other end of the top surface of the base plate is provided with a positioning and mounting groove for installing the aircraft adapter flange.

[0008] The top surface of the support block is an inclined plane, and the angle between the inclined plane and the horizontal plane is equal to the angle between the threaded section of the aircraft adapter and the flange.

[0009] The top plate is arranged along the inclined direction of the top surface of the support block, and one end of the top plate is fixedly connected to the top surface of the support block;

[0010] The knurled locating screw is vertically installed at the other end of the top plate; the knurled locating screw is used to axially fix the threaded section of the replaceable aircraft adapter.

[0011] Furthermore, the positioning mounting groove includes a semi-circular groove and a rectangular groove communicating with the semi-circular groove;

[0012] The semi-circular groove is used to mate with the center of the bottom of the flange to position the flange on the base plate; the rectangular groove is used to reduce the impact of welding heat on the transition joint.

[0013] Furthermore, the base plate is provided with screw holes corresponding to the mounting holes on the flange, for fixing the flange to the base plate with screws.

[0014] Furthermore, the knurled positioning screw includes a handle section, a first shaft, and a second shaft that are coaxially and sequentially fixedly connected; the first shaft is an optical shaft, and the first shaft is clearance-fitted with an optical hole opened on the top plate; the second shaft has an inner hole along the axis, and an internal thread is opened in the inner hole for mating with the upper thread of the threaded section of the replacement aircraft adapter.

[0015] Furthermore, the clamping device is made of 30CrMnSiA.

[0016] The advantages of this utility model are:

[0017] 1. In this utility model, based on the angle between the threaded section of the adapter and the flange, an inclined surface is designed on the support block, and a positioning mounting groove for positioning the adapter flange is opened on the base plate. The knurled positioning screws installed on the top plate abut against the end face of the threaded section of the adapter, so that the position of the adapter is fixed during the welding operation, there is no risk of misalignment, the adapter is not deformed after welding, and the welding quality is high.

[0018] 2. In this utility model, the optical axis in the middle of the knurled positioning screw is clearance-fitted with the optical hole on the top plate, allowing the knurled positioning screw to rotate within the optical hole. This facilitates adjustment of the angle of the knurled positioning screw, ensures reliable clamping of the threaded section of the adapter, and makes the adapter accurately positioned.

[0019] 3. When the clamping device of this utility model is used to weld and repair the adapter, it is only necessary to fix the adapter flange on the base plate according to the positioning position, and adjust the knurled positioning screws to make them abut against the end face of the thread section of the adapter. The disassembly and assembly are quick and can realize the batch repair of aircraft adapters.

[0020] 4. This utility model has a simple structure, is easy to process and manufacture, has low cost, and is not restricted by the location. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the overall structure of the clamping device of this utility model;

[0022] Figure 2 yes Figure 1 Front view of the midsole plate;

[0023] Figure 3 yes Figure 1 Top view of the midsole plate;

[0024] Figure 4 yes Figure 1 Main view of the central support block;

[0025] Figure 5 yes Figure 1 Top view of the central top plate;

[0026] Figure 6 This is the front view of the knurled screw in the diagram;

[0027] Figure 7 This is a schematic diagram of an aircraft adapter joint structure;

[0028] Figure 8 This is a schematic diagram of the flange in an aircraft adapter.

[0029] Figure 9 This is a schematic diagram of the clamping device of this utility model and its cooperation with the aircraft adapter.

[0030] Explanation of reference numerals in the attached drawings: 1-base plate, 101-first screw mounting hole, 102-positioning mounting groove, 103-second screw mounting hole, 2-support block, 3-top plate, 4-knurled positioning screw, 5-adapter joint, 501-threaded section, 502-flange. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below. These embodiments are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] Reference Figure 7 and Figure 8 The aircraft adapter 1 includes a threaded section 501 and a flange 502, with the threaded section 501 inclined relative to the flange 502. After disassembly from the aircraft's drain valve, the threads of the adapter's threaded section are worn down. To avoid wasting resources, the worn threaded section needs to be replaced using argon arc welding.

[0033] Reference Figure 1To ensure reliable positioning of the adapter during the repair process, this utility model provides a clamping device for welding repair of aircraft adapters, including a base plate 1, a support block 2, a top plate 3, and knurled positioning screws 4. The support block 2 is fixed to one end of the top surface of the base plate 1, and the other end of the top surface of the base plate is provided with a positioning and mounting groove for the flange of the aircraft adapter; the top surface of the support block 2 is inclined, and the angle between the inclined surface and the horizontal plane is equal to the angle between the threaded section of the aircraft adapter and the flange; the top plate 3 is set along the inclined direction of the top surface of the support block 2, and one end of the top plate 3 is fixedly connected to the top surface of the support block 2; the knurled positioning screws 4 are vertically installed at the other end of the top plate 3, and the knurled positioning screws are used to abut the end of the threaded section of the replaced adapter.

[0034] Reference Figure 2 and Figure 3 The base plate 1 has symmetrically arranged first screw mounting holes 101 on one end of its top surface. These holes are used to fix the support block 2 to the base plate using screws. A positioning mounting groove 102 is provided on the other end of the base plate's top surface. This groove engages with the center of the flange bottom of the adapter, positioning the adapter on the base plate. The positioning mounting groove 102 includes a semi-circular groove and a rectangular groove connected to it. The semi-circular groove engages with the center of the flange bottom of the adapter, positioning the flange on the base plate. The rectangular groove ensures a uniform heat-affected zone during welding, preventing welding deformation. Four second screw mounting holes 103 are symmetrically arranged around the positioning mounting groove 102, centered on the center of the semi-circular groove. These holes correspond to the mounting holes on the flange 502 of the adapter, positioning and fixing the flange to the base plate and restricting flange rotation.

[0035] Reference Figure 4 The support block 2 is a rectangular block with a sloping top surface. The angle between the top surface and the horizontal plane is determined based on the angle between the threaded section 501 and the flange in the adapter, ensuring the positioning angle of the adapter. The bottom of the support block has screw holes corresponding to the first screw mounting holes 101 on the base plate for fixing the support block to the base plate. Two screw holes are provided on the top surface of the support block for fixing the top plate 3 to the support block 2. The height of the support block is determined according to the height design of the adapter, providing installation space for the adapter.

[0036] Reference Figure 5The top plate 3 is a rectangular plate with a screw hole at one end for fixing it to the top surface of the support block with screws. After the top plate is fixed to the support block, an installation space for installing the adapter joint 5 is formed between the other end of the top plate and the bottom plate. A light hole is provided at the other end of the top plate for installing a knurled positioning screw 4. The light rod in the middle of the knurled positioning screw 4 is clearance-fitted with the light hole, allowing the knurled positioning screw to rotate around the axis of the light hole to adjust its angle.

[0037] Reference Figure 6 The knurled positioning screw 4 includes a handle section, a first shaft, and a second shaft coaxially and sequentially fixedly connected. The first shaft is a smooth shaft, which is clearance-fitted with a smooth hole on the top plate. The second shaft has an inner hole along its axis, and an internal thread in the inner hole, which is used to mate with the threaded section 501 of the replaced adapter, thus fixing the threaded section of the adapter during welding. The knurled positioning screw can rotate within the smooth hole on the top plate to finely adjust the angle of the knurled positioning screw, so that the knurled positioning screw can accurately fix the position of the threaded section of the adapter, ensuring reliable positioning.

[0038] To ensure the overall strength of the clamping device of this utility model, the material of each component is preferably 30CrMnSiA.

[0039] Reference Figure 9 When using the clamping device of this utility model to fix the adapter to be repaired, first place the bottom of the adapter flange on the positioning mounting groove on the base plate, with the center of the flange engaging with the semi-circular groove; then install screws in the second screw mounting hole 103 on the base plate to fix the base plate to the flange of the adapter; place the newly machined threaded section of the adapter between the top plate and the flange, with the upper end of the threaded section screwed into the inner hole of the second shaft of the knurled positioning screw 4, forming a threaded engagement; the lower end of the threaded section abuts against the center connection of the flange, so that the knurled positioning screw axially tightens the newly machined threaded section of the adapter. After fixing, a welder uses argon arc welding to fix the replaced threaded section to the flange.

[0040] After the re-machined threaded section end face is attached to the top plate, it is fixed in place with a knurled positioning screw.

[0041] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A clamping device for welding repair of an aircraft adapter joint, the aircraft adapter joint comprising a threaded section and a flange, wherein the threaded section is inclined relative to the flange; characterized in that, The clamping device includes a base plate, a support block, a top plate, and knurled positioning screws; The support block is fixed to one end of the top surface of the base plate, and the other end of the top surface of the base plate is provided with a positioning and mounting groove for installing the aircraft adapter flange. The top surface of the support block is an inclined plane, and the angle between the inclined plane and the horizontal plane is equal to the angle between the threaded section of the aircraft adapter and the flange. The top plate is arranged along the inclined direction of the top surface of the support block, and one end of the top plate is fixedly connected to the top surface of the support block; The knurled locating screw is vertically installed at the other end of the top plate; the knurled locating screw is used to axially fix the threaded section of the replaceable aircraft adapter.

2. The clamping device for welding and repairing aircraft adapter joints according to claim 1, characterized in that, The positioning and mounting groove includes a semi-circular groove and a rectangular groove communicating with the semi-circular groove. The semi-circular groove is used to mate with the center of the bottom of the flange to position the flange on the base plate; the rectangular groove is used to reduce the impact of welding heat on the transition joint.

3. The clamping device for welding and repairing aircraft adapter joints according to claim 2, characterized in that, The base plate is provided with screw holes corresponding to the mounting holes on the flange, for fixing the flange to the base plate with screws.

4. The clamping device for welding and repairing aircraft adapter joints according to claim 1, characterized in that, The knurled positioning screw includes a handle section, a first shaft, and a second shaft that are coaxially and sequentially fixedly connected. The first shaft is a light shaft, and the first shaft is clearance-fitted with a light hole opened on the top plate. The second shaft has an inner hole along the axis, and an internal thread is opened in the inner hole for mating with the upper thread of the threaded section of the replacement aircraft adapter.

5. A clamping device for welding and repairing aircraft adapter joints according to any one of claims 1-3, characterized in that, The clamping device is made of 30CrMnSiA.

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