Pipe fitting closing-up fixing mechanism

Abstract

The utility model relates to the technical field of pipe fitting closing-in, in particular to a pipe fitting closing-in fixing mechanism. The spinning mechanism is matched with a machine tool for spinning and closing up, and the fixing mechanism is adopted for fixing the closing-up block, so that the position of the closing-up block is stable in the rotating process, a bent closing-up section is uniform in stress, the closing-up quality is good after closing-up is completed, the deformation of the closing-up section is small, and the flexible rotation of the closing-up block can be realized; the rotating abrasion between the pressure collecting block and the rotating component is reduced, the operation precision is improved, and the maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting closing technology, and in particular to a pipe fitting closing and fixing mechanism. Background Technology

[0002] In certain specific environments, such as the field of aero-engines, some thin-walled metal parts require a tapering method at the end of the fitting to fix a pressure block to one end, reducing the diameter. The tapered fitting then needs to rotate and engage with other components. For example... Figure 1 As shown, the pressure block 1 has a through hole 11 in the middle for cooperation with other components. Before closing, the inner wall of the closed end of the pipe 2 has a concave-convex fit with the pressure block 1. By bending the pipe section extending beyond the pressure block 1 inward along the circumference and covering it with the surface of the pressure block 1, the through hole 11 is exposed, thus achieving closure. The closed end face after closure is flat, and the diameter of the hole at the closure is larger than the diameter of the through hole 11 on the pressure block 1, so that other components can contact the pressure block 1. In actual use, it was found that the thin-walled metal part and the rotating parts often experience rotational jamming, resulting in poor rotational cooperation. In addition, the thin-walled metal part will have rigid collisions with the rotating parts under vibration, resulting in large rotational wear between the components, affecting the engine's operating accuracy and requiring frequent maintenance.

[0003] Research has found that for the finishing treatment of this type of pipe fitting, such as Figure 2 As shown, the traditional pipe fitting closing method uses a mold 3 with a groove at the bottom to press from top to bottom. Under the constraint of the groove in mold 3, deformation occurs in areas other than the closing point, resulting in the locking of the closing block 1. If the pipe fitting closing process could both deform the thin-walled metal inward to achieve the closing purpose and allow the closing block to rotate freely after closing, allowing it to rotate with the rotating parts, rotational wear between the thin-walled metal part and the rotating parts could be reduced, improving operational accuracy and thus reducing maintenance frequency. Therefore, it is necessary to improve the traditional pipe fitting closing processing method to enhance the rotational flexibility of the thin-walled metal part and the rotating parts. Utility Model Content

[0004] The purpose of this utility model is to address the problem in the existing technology where the end of a thin-walled metal part is stamped with a mold with a groove at the bottom for closing, and the closing block locks due to the deformation of the pipe wall, resulting in poor rotational coordination between the thin-walled metal part and the rotating component, which easily leads to greater wear and reduced mechanical fit accuracy. This invention provides a pipe closing and fixing mechanism.

[0005] This utility model provides a pipe fitting closing and fixing mechanism, including a spinning mechanism and a fixing mechanism.

[0006] The spinning mechanism is used to spin and close the pipe fittings, and can adjust the feed amount and feed angle in real time according to the change of the pipe end curvature.

[0007] The fixing mechanism includes an end cap and a fixing member. The end cap is used to be set at the opposite end of the pipe fitting's constriction end, and the end cap is detachably connected to the pressure block through the fixing member.

[0008] This solution uses a spinning mechanism to spin-close the pipe end. Pressure is applied to the pipe wall while rotating to achieve the final closure. During the closure process, the feed rate and angle of the spinning mechanism are controlled to adjust the magnitude and position of the force, ensuring controllable deformation and uniform force distribution at the closure end. The spinning mechanism is an existing device. During the closure process, end caps are installed at opposite ends of the closure position. These end caps are connected to a pressure block via a fixing component, keeping the pressure block and end cap relatively fixed at opposite ends of the pipe. This prevents the pressure block from separating from the pipe during the spinning closure process. After the spinning closure is completed, the fixing mechanism is disassembled to obtain the closure pipe. The detachable fixing mechanism can be reused.

[0009] By adopting the above-mentioned pipe fitting closing and fixing mechanism, the closing block can be kept in a stable position during rotation, the bending closing section is subjected to uniform force, the closing quality is good after closing is completed, the deformation of the closing section is small, the closing block can be rotated flexibly, which helps to reduce rotational wear between the closing block and the rotating parts, improve the running accuracy, and reduce the maintenance frequency.

[0010] During the spinning process, the pipe fitting can be fixed in place, and the spinning mechanism can be rotated around the pipe fitting end within a small range or in a 360° omnidirectional manner. When the spinning mechanism is rotated around the pipe fitting end within a small range, the pipe fitting end can be manually or automatically adjusted to close to a certain extent. Alternatively, the pipe fitting can be rotated while the spinning mechanism is relatively fixed. The spinning method is not limited to the examples mentioned above.

[0011] Preferably, the above-mentioned pipe fitting closing and fixing mechanism also includes a machine tool. The machine tool clamps and rotates the pipe fitting, and the spinning mechanism is fixed relative to the pipe fitting as a whole, which is convenient for processing.

[0012] Preferably, the machine tool uses a three-jaw chuck to simultaneously clamp the pipe and the end cap on their circumferential surfaces along the axial direction.

[0013] Preferably, the outer contour shape and size of the end cap are compatible with the outer contour shape and size of the pipe fitting, which provides good adaptability to working conditions and makes clamping convenient.

[0014] Preferably, the fastener is a bolt. Alternatively, the fastener may be a threaded rod or other similar component.

[0015] Preferably, the end cap has a through hole for the fixing member to pass through, the through hole is coaxial with the through hole of the pressure block, the through hole is a smooth hole, the bolt passes through both the through hole and the through hole and is fixed by a nut, making the connection convenient and quick; or, the through hole is a threaded hole, and the bolt is threadedly connected to the end cap.

[0016] Preferably, the bolt is inserted from the side where the end cap is located, the nut is located on the side where the pressure block is located, and the maximum diameter of the nut is smaller than the size of the opening after the pipe fitting is closed, so that the nut can be easily removed after the pipe fitting is closed.

[0017] As another possible implementation, the bolt can also be inserted from the side where the pressure block is located and fixed by a nut on the side where the end cap is located. In this case, a nut with a maximum diameter smaller than the size of the hole after the pipe is closed should be used. When disassembling, the nut on the end cap side can be removed and the bolt can be pushed out towards the pressure block side.

[0018] Preferably, the fixing mechanism further includes a washer for placement on the surface of the pressure block or end cap, the inner diameter of the washer being smaller than or equal to the inner diameter of the through hole or perforation. The washer can be used to coordinate connections between holes of different diameters.

[0019] Preferably, the spinning mechanism includes a tool holder, a tool handle, and a rolling blade. One end of the tool handle is fixedly connected to the tool holder, and the other end of the tool handle is provided with a U-shaped groove. The rolling blade is rotatably connected to the tool handle in the U-shaped groove via a pin. A bearing is provided between the pin and the tool handle, allowing the rolling blade to rotate smoothly.

[0020] Preferably, the outer contour of the rolling cutter is arc-shaped. Compared with knurling wheels, the arc-shaped rolling cutter can make smooth contact with the pipe wall, achieving a tooth-free finish and better sealing quality.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] The pipe fitting closing and fixing mechanism provided by this utility model is used for pipe fitting closing. The closing is achieved by a spinning mechanism in conjunction with a machine tool, and the closing block is fixed by a fixing mechanism. This ensures that the closing block is stable in position during rotation, the bending closing section is subjected to uniform force, the closing quality is good after closing, the deformation of the closing section is small, and the closing block can rotate flexibly. This helps to reduce rotational wear between the closing block and rotating parts, improves operating accuracy, and reduces maintenance frequency. Attached Figure Description

[0023] Figure 1 Comparison images of a thin-walled metal part before and after the joint is closed;

[0024] Figure 2 This is a structural diagram of a traditional sealing method;

[0025] Figure 3 This is a schematic diagram of the structure of a pipe fitting closing and fixing mechanism in the embodiment;

[0026] Figure 4 This is a diagram showing the final state of the pipe fitting after the pipe fitting is closed using the pipe fitting closing and fixing mechanism in the embodiment.

[0027] The markings in the diagram are: 1-Pressure block; 11-Through hole; 2-Pipe fitting; 3-Mold; 4-End cap; 5-Bolt; 6-Nut; 7-Tool holder; 8-Tool handle; 9-Rolling tool; 10-Three-jaw chuck. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0031] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0032] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0033] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0034] Example

[0035] like Figure 3 , Figure 4 As shown, this embodiment provides a pipe fitting closing and fixing mechanism, including a spinning mechanism, a fixing mechanism, and a machine tool. The machine tool is used to clamp the pipe fitting 2 and rotate it, cooperating with the spinning mechanism to spin and close the fitting.

[0036] The spinning mechanism is used to spin-close the pipe fitting 2. It can adjust the feed rate and feed angle in real time according to the change of the pipe end curvature. The spinning mechanism is an existing device, including a tool holder 7, a tool shank 8, and a rolling cutter 9. One end of the tool shank 8 is fixedly connected to the tool holder 7, and the other end of the tool shank 8 is provided with a U-shaped groove. The two sides of the U-shaped groove are lugs. The rolling cutter 9 is installed in the U-shaped groove and is rotatably connected to the tool shank 8 through a cylindrical pin. The rolling cutter 9 is required to rotate smoothly without jamming. It is preferable to set a bearing between the pin and the tool shank 8. The tool shank 8 is mounted on the tool holder 7. By adjusting the angle of the tool holder 7, different closing requirements can be met. For example, the spinning mechanism can adopt a necking spinning slide mechanism provided in the prior art patent application number 202222819347.1. The tool holder 7 is connected to the bearing seat, which is sleeved on the fixed shaft. The bearing seat is connected to the rotary drive component through gears. The rotary drive component is not limited to a hydraulic cylinder or a motor, so that the tool holder 7 rotates synchronously with the bearing seat around the fixed shaft. During the spinning operation, the rolling blade 9 directly contacts the wall of the pipe 2 and spins the wall of the pipe 2 during the rotation. The rotary drive component can drive the tool holder 7 to rotate. During the rotation of the tool holder 7, the rolling blade 9 installed on the tool holder 7 can rotate synchronously with the tool holder 7. Thus, during the necking process with the wall of the pipe 2, it can be deflected at an angle relative to the wall of the pipe 2 to adapt to the changes in the spinning curvature of the necking section of the pipe 2, ensuring that the thickness of the necking section of the pipe 2 is uniform in the direction of curvature change.

[0037] In this embodiment, the outer contour of the rolling cutter 9 is preferably set as an arc-shaped surface. Compared with the knurling wheel, the arc-shaped rolling cutter 9 can make flat contact with the pipe wall, achieving no tooth marks and better sealing quality.

[0038] The main function of the fixing mechanism is to fix the pressure block 1, so that the pressure block 1 will not fall off during the pressure-reducing process. Specifically, the fixing mechanism includes an end cap 4 and a fixing member. The end cap 4 is used to be set at the opposite end of the constriction end of the pipe fitting 2, and the end cap 4 is detachably connected to the pressure block 1 through the fixing member.

[0039] In one or more embodiments, the fastener is preferably a bolt 5. The end cap 4 has a through hole for the fastener to pass through, the through hole being coaxially arranged with the through hole 11 of the pressure block 1, and the through hole is preferably a smooth hole. Before closing, the bolt 5, nut 6, and end cap 4 are pressed as shown... Figure 3 The bolt 5 is fixed by inserting it from the side where the end cap 4 is located, passing through the end cap 4 and the pressure block 1 in sequence, and then fixing it with the nut 6. The maximum diameter of the nut 6 is smaller than the size of the hole after the pipe fitting 2 is closed, so that the nut 6 can be easily removed after the closure, making the connection convenient and quick.

[0040] In one or more embodiments, the outer contour shape and size of the end cap 4 are adapted to the outer contour shape and size of the pipe fitting 2, which facilitates assembly and clamping.

[0041] In one or more embodiments, the fixing mechanism further includes a washer for placement on the surface of the pressure block 1 or the end cap 4. The inner diameter of the washer is less than or equal to the inner diameter of the through hole 11 or the perforation. The washer can be used to coordinate the connection between different hole diameters. For example, when the diameter of the through hole 11 of the pressure block 1 is smaller than the diameter of the perforation of the end cap 4, and the nut size of the bolt 5 that fits the through hole 11 of the pressure block 1 is small, a washer that fits the size of the bolt 5 can be placed on the side of the end cap 4. The washer increases the contact area with the end cap 4 to achieve a better connection.

[0042] In use, place the closing block into the sleeve fitting 2, install bolts 5, end caps 4, and nuts 6, and tighten the closing block to prevent it from being thrown out due to the rotation of the closing parts. Then, clamp the part to be closed using the three-jaw chuck 10 of a conventional lathe. The three-jaw chuck 10 clamps the fitting 2 and end cap 4 axially in one go. Run the machine tool, reduce the speed, and slowly adjust the position and angle of the tool holder 7, gradually moving it closer to the closing point. The rotation of the closing part will drive the rotation of the rolling cutter 9. Continue to move closer to the closing point, applying pressure. Rotate while closing to achieve the final closing purpose. After closing, retract the tool and stop the machine tool. Carefully remove the closing part, and remove bolts 5, nuts 6, and end caps 4. Closing is complete.

[0043] This solution uses a rotary pressure method to close the tubular product. As the bending curvature of the closure end changes, the rotation angle and feed rate of the tool holder 7 can be adjusted in real time to ensure uniform force during closure. After closure, the quality is excellent, and there is no deformation except at the closure point (the degree of slight deformation is negligible). Figure 4 As shown, the pressure block 1 can rotate relative to the rotating component, improving the assembly flexibility of the pressure block 1. By using such a closing part to cooperate with the rotating component, the pressure block 1 can rotate together with the rotating component, which has good adaptability to working conditions, helps to reduce rotational wear between the pressure block 1 and the rotating component, improves the running accuracy of the rotating component, and reduces the maintenance frequency.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipe end closing fixing mechanism characterized by comprising: The spinning mechanism and the fixing mechanism are included, The spinning mechanism is used for spinning the pipe (2) to close the mouth, and can adjust the feeding amount and the feeding angle in real time with the change of the pipe mouth curvature; The fixing mechanism includes an end cover (4) and a fixing part, the end cover (4) is used for being arranged at the opposite end of the pipe (2) closing end, and the end cover (4) is detachably connected to the closing block (1) through the fixing part.

2. A tube end closing fixture according to claim 1, characterized in that The outer contour shape size of the end cover (4) is matched with the outer contour shape size of the pipe (2).

3. A tube end closing device according to claim 1, characterized in that The fixing part adopts a bolt (5).

4. A tube end closure securing mechanism according to claim 3, wherein The end cover (4) is provided with a through hole for the fixing part to pass through, the through hole is coaxially arranged with the through hole (11) of the closing block (1), the through hole is a light hole, the bolt (5) passes through the through hole (11) and the through hole at the same time and is fixed by a nut (6); or the through hole is a threaded hole, and the bolt (5) is threadedly connected with the end cover (4).

5. A tube end closure securing mechanism according to claim 4, wherein The bolt (5) is arranged from the side where the end cover (4) is located, the nut (6) is located at the side where the closing block (1) is located, and the maximum diameter of the nut (6) is smaller than the size of the pipe (2) after closing the mouth.

6. A tube end closure securing mechanism according to claim 4, wherein The fixing mechanism further includes a gasket, the gasket is arranged on the surface of the closing block (1) or the end cover (4), and the inner diameter of the gasket is less than or equal to the inner diameter of the through hole (11) or the through hole.

7. A tube socket securing mechanism according to any one of claims 1 to 6, wherein The spinning mechanism includes a tool holder (7), a tool handle (8) and a rolling cutter particle (9), one end of the tool handle (8) is fixedly connected with the tool holder (7), the other end of the tool handle (8) is provided with a U-shaped groove, the rolling cutter particle (9) is rotatably connected with the tool handle (8) in the U-shaped groove through a pin shaft, and a bearing is arranged between the pin shaft and the tool handle (8).

8. A tube end closure securing mechanism according to claim 7, wherein The outer contour of the rolling cutter particle (9) is an arc surface.

9. A tube socket securing mechanism according to any one of claims 1 to 6, wherein A machine tool is further included, the machine tool is used for clamping the pipe (2) to rotate.

10. A tube end closure securing mechanism according to claim 9, wherein The machine tool adopts a three-jaw chuck (10) to simultaneously clamp the circumferential surface of the pipe (2) and the end cover (4) in the axial direction.

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