High-speed spinning sealing device for pipes

Abstract

The utility model provides a high-speed spinning sealing device for pipes, which relates to the technical field of pipe processing and comprises a mounting platform, a rotating spindle and a servo driving component. A plurality of spinning sealing assemblies are annularly and evenly distributed at the front end of the rotating main shaft, and an axial restraining mechanism is formed between the spinning sealing assemblies and the rotating main shaft. A shaft sleeve is coaxially and slidably arranged on the rotating main shaft, and an inclined plane linkage mechanism is formed between the shaft sleeve and the spinning sealing assembly; a fixing ring is rotationally assembled outside the shaft sleeve, and the shaft sleeve can axially move along with the fixing ring; the first servo linear module controls the fixing ring and the shaft sleeve connected with the fixing ring to conduct axial feeding, then the multiple spinning sealing assemblies are synchronously driven to be close to each other in the radial direction, and spinning sealing operation on the pipe is achieved. According to the device, pipe fixing and machining equipment rotating motion are adopted for machining, and compared with a traditional technology, gradual diameter shrinkage stretching can be conducted according to the machining requirement of a pipe so as to adapt to the size change in the pipe sealing process, and the sealing quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a high-speed spinning sealing device for pipes. Background Technology

[0002] Rotational compression of the open end of a metal pipe to reduce its diameter and seal it is a common metal pipe processing technology. It is a plastic forming process that combines rotational pressure with heat treatment. A rotating wheel system applies radial compression and axial tension to the pipe opening, causing the pipe to undergo plastic deformation during rotation, gradually reducing its diameter or even fusing to form a sealed end face.

[0003] Traditionally, a rotary clamping device or multi-stage spinning device is used to achieve the reduction of diameter by rotating the product while keeping the forming mold stationary. However, the traditional rotary clamping device has significant technical drawbacks: Statistics show that when processing extra-long pipes, the excessive moment of inertia of the rotary clamping device can easily lead to coaxiality deviations, affecting product rotation safety and deformation, thus impacting processing results and causing axial offsets of 0.15-0.3 mm / m, severely affecting the flatness of the sealing surface. While multi-stage spinning devices can achieve stepped diameter reduction, each additional station increases the floor space required. Furthermore, repeated clamping not only accumulates positioning errors but also increases energy consumption, contradicting green environmental protection principles. For example, for a 6mm thick metal pipe, the traditional process requires 3-4 clamping operations to reduce the diameter from Φ50mm to Φ18mm, which is not only cumbersome but also inefficient and prolongs the production cycle. The product rotates at high speed, but the mold does not rotate. This movement can easily lead to coaxiality deviation due to excessive rotational inertia, affecting product rotation safety and deformation. Therefore, in view of the shortcomings of the current processing technology, an invention is hereby disclosed that is a method for processing pipe ends by rotating the mold without rotating the product. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a high-speed spinning sealing device for pipes, which has high processing precision, can adapt to dimensional changes during the pipe sealing process, and ensures sealing quality.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A high-speed spinning and sealing device for pipes includes an installation platform with a rotating spindle connected to a servo drive assembly. A plurality of spinning and sealing assemblies are evenly distributed in a ring at the front end of the rotating spindle, forming an axial constraint mechanism between the spinning and sealing assemblies and the rotating spindle. A bushing is slidably mounted coaxially on the rotating spindle, forming an inclined plane linkage mechanism between the bushing and the spinning and sealing assemblies. A fixed ring is rotatably mounted outside the bushing and can follow the fixed ring in axial displacement. The fixed ring is connected to a first servo linear module, which controls the fixed ring and the connected bushing to perform axial feed, thereby synchronously driving the plurality of spinning and sealing assemblies to move closer together in the radial direction, thus realizing the spinning and sealing operation of the pipe.

[0007] Furthermore, the rotating spindle also includes a support plate located at the front end, and the spinning sealing assembly includes a mounting block and a radial support arm connected to the mounting block, with ball bearings at the ends of the radial support arms; the axial constraint mechanism includes a guide groove located on the support plate and insert plates located on both sides of the mounting block, with the insert plates slidably inserted into the guide groove.

[0008] Furthermore, the inclined plane linkage mechanism includes inclined guide grooves on both sides of the mounting block and U-shaped snap-fit ​​parts on the bushing. The mounting block is slidably connected to the U-shaped snap-fit ​​parts on the bushing through the inclined guide grooves. The bushing moves axially and, under the restriction of the axial constraint mechanism, causes the mounting block to move radially.

[0009] Furthermore, the mounting platform is provided with a stand, and the servo drive assembly includes a servo motor, which is fixed on the stand and connected to the drive pulley. A driven pulley is coaxially connected to the rotating spindle, and the drive pulley is connected to the driven pulley via a synchronous toothed belt.

[0010] Furthermore, the machine tool fixing plate and the pipe clamping assembly disposed thereon are also included; the installation platform is slidably connected to the machine tool fixing plate, and the machine tool fixing plate is provided with a second linear servo drive module, which is connected to the installation platform and controls the installation platform to move closer to or away from the pipe clamping assembly.

[0011] Furthermore, a reducing rod is coaxially arranged at the center of the support plate, and the front end of the reducing rod is provided with a tapered guide head.

[0012] Furthermore, it also includes a fork carriage, which is slidably connected to the mounting platform via a guide rail. Both ends of the retaining ring are fixedly connected to the fork carriage, and the fork carriage is connected to the first linear servo drive module.

[0013] Furthermore, it also includes a support shaft fixed on the mounting platform, with the rotating spindle rotatably mounted on the support shaft.

[0014] Furthermore, a first bearing is provided between the bushing and the fixed ring; a second bearing is provided between the rotating main shaft and the support shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This high-speed spinning sealing device uses a method of fixing the pipe and rotating the processing equipment for processing. Compared with traditional processes, this method can significantly improve the problem of coaxiality deviation and improve processing accuracy. In addition, the spinning sealing component has the function of radial movement, which, in conjunction with the action of the second linear servo drive module, causes axial movement. This allows for gradual diameter reduction and stretching according to the processing requirements of the pipe, perfectly adapting to the dimensional changes during the pipe sealing process and ensuring sealing quality. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a 3D view of a high-speed spinning sealing device;

[0019] Figure 2 This is a side view of a high-speed spinning sealing device;

[0020] Figure 3 This is a cross-sectional view of a high-speed spinning sealing device;

[0021] Figure 4 This is a schematic diagram of the support plate viewed from the front.

[0022] Figure 5 yes Figure 4 Cross-sectional view along the AA direction;

[0023] Figure 6 This is a schematic diagram showing the spinning sealing assembly separated from the bushing and support plate;

[0024] Figure 7 This is a schematic diagram showing the spinning sealing assembly separated from the support plate.

[0025] In the diagram: 1. Mounting platform; 2. Rotary spindle; 201. Support plate; 2011. Guide groove; 3. Servo drive assembly; 301. Servo motor; 302. Driving pulley; 303. Driven pulley; 304. Synchronous toothed belt; 4. Spin sealing assembly; 401. Mounting block; 4011. Insert plate; 4012. Inclined guide groove; 402. Radial support arm; 403. Ball bearing; 5. Bushing; 501. U-shaped snap-fit ​​part; 6. Fixing ring; 7. First servo linear module; 8. Stand; 9. Machine base fixing plate; 10. Pipe clamping assembly; 11. Second linear servo drive module; 12. Hole reduction rod; 13. Fork; 14. Support shaft; 15. First bearing; 16. Second bearing. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] like Figures 1 to 7 As shown, this utility model claims protection for a high-speed spinning sealing device for pipes, including an installation platform 1, a rotating spindle 2 provided on the installation platform 1, and a support shaft 14 fixed on the installation platform 1. The rotating spindle 2 is rotatably mounted on the support shaft 14 through a second bearing 16. Therefore, the support shaft 14 supports the rotating spindle 2 and improves the stability during operation.

[0028] The rotating spindle 2 is connected to the servo drive assembly 3 for transmission. Specifically, a stand 8 is provided on the mounting platform 1. The servo drive assembly 3 includes a servo motor 301, which is fixed on the stand 8. The servo motor 301 is connected to the drive pulley 302. A driven pulley 303 is coaxially connected to the rotating spindle 2. The drive pulley 302 is connected to the driven pulley 303 through a synchronous toothed belt 304. Therefore, the servo motor 301 ultimately drives the rotating spindle 2 to rotate.

[0029] A plurality of spinning sealing assemblies 4 are evenly distributed in a ring at the front end of the rotating spindle 2. An axial constraint mechanism is formed between the spinning sealing assemblies 4 and the rotating spindle 2. The spinning sealing assembly 4 includes a mounting block 401 and a radial support arm 402 connected to the mounting block 401. A ball bearing 403 is provided at the end of the radial support arm 402. The rotating spindle 2 also includes a support plate 201 fixed to the front end. The support plate 201 rotates together with the rotating spindle 2. Figure 7 As shown, the axial constraint mechanism includes a guide groove 2011 located on the support plate 201 and insert plates 4011 located on both sides of the mounting block 401. The insert plates 4011 are slidably inserted into the guide groove 2011. Therefore, the mounting block 401 is radially adjustable to the support plate 201 through the assembly of the insert plates 4011 and the guide groove 2011.

[0030] A bushing 5 is slidably mounted coaxially on the rotating spindle 2, and a sloped linkage mechanism is formed between the bushing 5 and the spinning sealing assembly 4; specifically, as shown... Figure 5 as well as Figure 6 As shown, the inclined plane linkage mechanism includes inclined guide grooves 4012 on both sides of the mounting block 401 and a U-shaped snap-fit ​​part on the bushing 5. The mounting block 401 is slidably connected to the U-shaped snap-fit ​​part 501 on the bushing 5 through the inclined guide grooves 4012. Since there is also an axial constraint mechanism between the rotating spindle 2 and the spinning sealing assembly 4, when the bushing 5 moves axially, the mounting block 401 moves radially under the restriction of the axial constraint mechanism, which can control the entire spinning sealing assembly 4 to move closer to or away from the center position of the support plate 201.

[0031] A retaining ring 6 is rotatably mounted on the outer side of the bushing 5. The bushing 5 and the retaining ring 6 are rotatably assembled via the first bearing 15. Figure 5 As can be seen, a rear end plate is provided on the right side of the fixed ring 6, which is locked to the bushing 5 by bolts. A front retaining ring is provided on the left side of the fixed ring 6, which is also locked to the bushing 5. The rear end plate and the front retaining ring clamp and fix the fixed ring 6, so the axial displacement of the fixed ring 6 will synchronously drive the bushing 5 to move. The fixed ring 6 is connected to the first servo linear module 7. As a further preferred embodiment, it also includes a fork 13, which is slidably connected to the mounting platform 1 via a guide rail. The two ends of the fixed ring 6 are fixedly connected to the fork 13, and the fork 13 is connected to the first linear servo drive module.

[0032] In the overall scheme, the servo drive component 3 drives the rotating spindle 2 to rotate, thereby driving several spinning and sealing components 4 to rotate. The first servo linear module 7 controls the fixed ring 6 and the bushing 5 connected to it to feed axially, thereby synchronously driving several spinning and sealing components 4 to move closer to each other in the radial direction, thereby realizing the spinning and sealing operation of the pipe, and can be adapted to the gradual sealing of pipes of different diameters.

[0033] This high-speed spinning sealing device also includes a machine base fixing plate 9 and a pipe clamping assembly 10 disposed thereon; the mounting platform 1 is slidably connected to the machine base fixing plate 9, and a second linear servo drive module 11 is disposed on the machine base fixing plate 9. The second linear servo drive module 11 is connected to the mounting platform 1 and controls the mounting platform 1 to move closer to or further away from the pipe clamping assembly 10 to adapt to the stretching of pipes of different lengths.

[0034] A hole-shrinking rod 12 is coaxially arranged at the center of the support plate 201. The front end of the hole-shrinking rod 12 is provided with a tapered guide head. During the spinning process, the hole-shrinking rod 12 is inserted into the tube to provide a certain rigid support to the inner wall of the tube. This can effectively prevent the tube from collapsing or the wall thickness from being uneven during the processing, while ensuring precise control of the geometric dimensions of the hole-shrinking area.

[0035] In this embodiment, both the first linear servo drive module and the second linear servo drive module are lead screw module structures driven by servo motors. The structure and working principle of the lead screw module are existing technologies and will not be described in detail here. Servo motors have the advantages of high precision and stable operation, which improves the accuracy of processing.

[0036] This high-speed pipe spinning and sealing device adopts an innovative processing method, effectively solving the problems in traditional processes. The specific operation process is as follows: First, the pipe is securely installed on the pipe clamping assembly 10. Then, the servo drive assembly 3 is started, driving the rotating spindle 2 to rotate, which in turn drives multiple spinning and sealing assemblies 4 to rotate synchronously. At the same time, the first servo linear module 7 is started, controlling the fixed ring 6 and its connected bushing 5 to perform axial feeding. As the bushing 5 moves axially, several spinning and sealing assemblies 4 are driven synchronously and move closer to each other in the radial direction, finally realizing the spinning and sealing operation of the pipe.

[0037] The unique feature of this device is that it uses a method of fixing the pipe and rotating the processing equipment for processing. Compared with traditional processes, this method can significantly improve the problem of coaxiality deviation and improve processing accuracy. In addition, the spinning sealing assembly 4 has the function of moving radially, which can gradually reduce the diameter according to the processing requirements of the pipe, perfectly adapting to the dimensional changes during the pipe sealing process and ensuring sealing quality.

[0038] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., 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 high-speed spinning sealing device for pipes, characterized in that: The system includes an installation platform (1), on which a rotating spindle (2) is installed. The rotating spindle (2) is connected to a servo drive assembly (3). Several spinning sealing assemblies (4) are evenly distributed in a ring at the front end of the rotating spindle (2). An axial constraint mechanism is formed between the spinning sealing assemblies (4) and the rotating spindle (2). A bushing (5) is slidably mounted on the rotating spindle (2). An inclined linkage mechanism is formed between the bushing (5) and the spinning sealing assembly (4). A fixed ring (6) is rotatably mounted on the bushing (5) and can follow the fixed ring (6) to undergo axial displacement. The fixed ring (6) is connected to a first servo linear module (7). The first servo linear module (7) controls the fixed ring (6) and the bushing (5) connected to it to perform axial feeding, thereby synchronously driving several spinning sealing assemblies (4) to move closer to each other in the radial direction to realize the spinning sealing operation of the pipe.

2. The high-speed spinning sealing device for pipes according to claim 1, characterized in that: The rotating spindle (2) also includes a support plate (201) at the front end. The spinning sealing assembly (4) includes a mounting block (401) and a radial support arm (402) connected to the mounting block (401). The end of the radial support arm (402) is provided with a ball bearing (403). The axial constraint mechanism includes a guide groove (2011) on the support plate (201) and insert plates (4011) on both sides of the mounting block (401). The insert plates (4011) can be slidably inserted into the guide groove (2011).

3. The high-speed spinning sealing device for pipes according to claim 1, characterized in that: The inclined plane linkage mechanism includes inclined guide grooves (4012) on both sides of the mounting block (401) and U-shaped snap-fit ​​parts on the bushing (5). The mounting block (401) is slidably connected to the U-shaped snap-fit ​​parts (501) on the bushing (5) through the inclined guide grooves (4012). The bushing (5) moves axially and, under the restriction of the axial constraint mechanism, causes the mounting block (401) to move radially.

4. The high-speed spinning sealing device for pipes according to claim 1, characterized in that: The mounting platform (1) is provided with a stand (8). The servo drive assembly (3) includes a servo motor (301). The servo motor (301) is fixed on the stand (8). The servo motor (301) is connected to the drive pulley (302). The driven pulley (303) is coaxially connected to the rotating spindle (2). The drive pulley (302) is connected to the driven pulley (303) through a synchronous toothed belt (304).

5. The high-speed spinning sealing device for pipes according to any one of claims 1 to 4, characterized in that: The machine tool fixing plate (9) and the pipe clamping assembly (10) set thereon are also included; the installation platform (1) is slidably connected to the machine tool fixing plate (9), and the machine tool fixing plate (9) is provided with a second linear servo drive module (11), which is connected to the installation platform (1) and controls the installation platform (1) to move closer to or away from the pipe clamping assembly (10).

6. The high-speed spinning sealing device for pipes according to claim 2, characterized in that: The support plate (201) is coaxially provided with a hole-shrinking rod (12), and the front end of the hole-shrinking rod (12) is provided with a tapered guide head.

7. The high-speed spinning sealing device for pipes according to claim 1, characterized in that: It also includes a fork (13), which is slidably connected to the mounting platform (1) via a guide rail. The two ends of the fixing ring (6) are fixedly connected to the fork (13), and the fork (13) is connected to the first linear servo drive module.

8. The high-speed spinning sealing device for pipes according to claim 1, characterized in that: It also includes a support shaft (14) fixed on the mounting platform (1), and a rotating spindle (2) rotatably mounted on the support shaft (14).

9. The high-speed spinning sealing device for pipes according to claim 8, characterized in that: A first bearing (15) is provided between the bushing (5) and the fixed ring (6); a second bearing (16) is provided between the rotating main shaft (2) and the support shaft (14).

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