Thin-walled steel pipe machining internal support device

Abstract

The present application relates to a kind of thin-walled steel pipe processing internal support device, including processing table, the one side of the processing table is respectively fixedly connected with guide rail and steel pipe conveying belt, the side of the guide rail is slidably connected with two rotating cylinders respectively driven by driving mechanism, the present application relates to the technical field of thin-walled steel pipe processing.This kind of thin-walled steel pipe processing internal support device, realize the uniform flexible support in the inside of thin-walled steel pipe, effectively prevent processing deformation: by two positioning rods and the air bag of surface coating of being oppositely arranged, after positioning rod inserts inside steel pipe, by outside air pump to air bag inflation, air bag expands and tightly fits with the inner wall of steel pipe, provides 360 degrees uniform radial support force.Compared with rigid core rod, air bag can be self-adapting to the slight tolerance of steel pipe inner diameter, realize gapless fit, both provide enough support rigidity, and avoid the scratch of hard contact to inner wall.

Description

Technical Field

[0001] This invention relates to the field of thin-walled steel pipe processing technology, specifically to an internal support device for thin-walled steel pipe processing. Background Technology

[0002] During the processing of thin-walled steel pipes (such as polishing, grinding, and cutting), the pipes, due to their thin walls and insufficient rigidity, are prone to radial deformation or collapse under external processing forces, severely affecting processing accuracy and surface quality. Traditional support methods often employ external clamps or internal mandrel supports. External clamps easily leave indentations or scratches on the steel pipe surface, and the clamping force is difficult to control; too tight, and deformation occurs; too loose, and effective support is not provided. While internal mandrels can provide better radial support, they have the following problems: First, the rigid mandrel has a hard contact with the inner wall of the steel pipe. For steel pipes with slight tolerances in the inner diameter, the mandrel may not fit tightly, resulting in uneven support. Second, the rigid mandrel is difficult to install and remove, especially for thin-walled pipes with a large length-to-diameter ratio, easily scratching the inner wall. Furthermore, traditional support devices cannot achieve axial fine-tuning and rotation of the steel pipe during processing, affecting processing flexibility and efficiency. Therefore, there is an urgent need in this field for an integrated support device that can achieve uniform internal support of thin-walled steel pipes, facilitate clamping and adjustment, and assist in external processing. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an internal support device for thin-walled steel pipe processing, which solves the aforementioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: an internal support device for thin-walled steel pipe processing, comprising a processing table, a guide rail and a steel pipe conveyor belt fixedly connected to one side of the processing table, two rotary cylinders driven by a drive mechanism slidably connected to the side of the guide rail, a flipping frame fixedly connected to the piston rod of the rotary cylinder through a connecting rod, a rotating block rotatably connected to the inner cavity of the flipping frame, a positioning rod fixedly connected to one side of the rotating block, and an inflatable airbag covering the surface of the positioning rod; It also includes a polishing mechanism mounted on the surface of the processing table. The polishing mechanism comprises two guide frames fixed to the surface of the processing table, distributed on both sides of the positioning rod. Each guide frame has a guide groove within its inner cavity. A power motor, driven by a cylinder, is slidably connected to the inner cavity of the guide groove. A rotating wheel is fixedly connected to the output shaft of the power motor. Polishing belts are driven to the surfaces of both rotating wheels. In use, the steel pipe is conveyed via a steel pipe conveyor belt. Rotating the rotary cylinder on the right side causes the tilting frame to rotate to the side of the steel pipe conveyor belt, and then the steel pipe is conveyed onto the inflatable sleeve on the surface of the positioning rod. The airbag is placed on the right side, and then the right-side rotary cylinder slides to the right on the guide rail, then flips and resets, driving the steel pipe to the side of the left-side positioning rod. Then the right-side rotary cylinder slides to the left on the guide rail, driving the steel pipe to be fitted onto the left-side positioning rod. At this time, the two positioning rods are connected together by the end clips. Then the airbag is inflated, expanding to support the inner wall of the steel pipe. The movement cylinder drives the support wheel to move and abut against the side wall of the steel pipe for support. Polishing is performed by the polishing belt. During the polishing process, the position of the steel pipe is adjusted by the rotary cylinder on the left and right moving track, and then the rotating block drives the steel pipe to rotate.

[0005] As a further aspect of the present invention: the inflatable airbag is connected to an external air pump through an air inlet pipe and has a built-in air pressure monitoring sensor.

[0006] As a further aspect of the present invention: the polishing belt is located below the positioning rod. By adjusting the position of the two rotating wheels, the polishing belt is moved to adjust its position, wrapping the lower surface of the steel pipe, and polishing is performed by rotating the polishing belt.

[0007] As a further aspect of the present invention: the surface of the processing table is provided with a support mechanism, the support mechanism including two motion cylinders fixed on the surface of the processing table, one end of the piston rod of each of the two motion cylinders is fixedly connected to a support wheel, and the two support wheels are symmetrically arranged along both sides of the positioning rod.

[0008] As a further aspect of the present invention: the side of the steel pipe conveyor belt is rotatably connected to a guide wheel, which guides the steel pipe so that it can be moved and fitted onto the surface of the positioning rod on the right side.

[0009] As a further aspect of the present invention: the guide rail is a linear slide rail structure, and a slider that is adapted to slide along the guide rail is fixedly connected to the bottom of the rotary cylinder. The driving mechanism is a transmission structure in which a drive motor and a transmission screw cooperate. The drive motor is fixed at the end of the guide rail, and the transmission screw is threadedly connected to the slider. The drive motor drives the transmission screw to rotate, thereby driving the rotary cylinder to perform linear reciprocating motion along the guide rail.

[0010] As a further aspect of the present invention: bearings are embedded at both ends of the inner cavity of the tilting frame, and the two ends of the rotating block are fixedly connected to the inner rings of the bearings respectively. A self-rotating drive motor is fixedly connected to the outer side of the tilting frame, and the output shaft of the self-rotating drive motor is fixedly connected to one end of the rotating block. The self-rotating drive motor drives the rotating block to rotate along the bearing axis, thereby driving the positioning rod and the steel pipe to rotate synchronously.

[0011] Compared with the prior art, the present invention has the following advantages: This system achieves uniform and flexible support inside thin-walled steel pipes, effectively preventing processing deformation. Two opposing positioning rods and their inflatable airbags provide this support. After the positioning rods are inserted into the steel pipe, an external air pump inflates the airbags, causing them to expand and fit tightly against the inner wall of the pipe, providing uniform radial support force throughout the 360 ​​degrees. Compared to rigid mandrels, the inflatable airbags can adapt to minute tolerances in the inner diameter of the steel pipe, achieving a gapless fit. This provides sufficient support rigidity while avoiding scratches to the inner wall caused by hard contact.

[0012] A highly efficient automated steel pipe feeding and positioning system was constructed: through the coordination of guide rails, rotary cylinders, tilting frames, and steel pipe conveyor belts, the automated conveying and clamping of steel pipes is achieved. The right-side rotary cylinder drives the tilting frame to rotate to one side of the conveyor belt. After the steel pipe is fitted onto the positioning rod, the tilting frame resets and conveys the steel pipe to the left-side positioning rod. The two positioning rods are then connected together by snap-fit ​​connectors at their ends. The entire process is highly automated, with rapid clamping and accurate positioning, significantly improving production efficiency.

[0013] The system enables adjustment of the steel pipe's position and orientation during processing: both rotary cylinders can slide left and right along the guide rail, allowing adjustment of the steel pipe's axial position during polishing; simultaneously, the rotating block drives the positioning rod to rotate, enabling the steel pipe's rotation. This dual adjustment function allows the polishing belt to cover the entire length and circumference of the steel pipe, ensuring consistent and complete processing.

[0014] The coordination between external polishing and auxiliary support has been optimized: the power motors inside the two guide frames can slide up and down along the guide grooves, driving the rotating wheel and polishing belt to adjust their positions and polish the lower surface of the steel pipe. At the same time, the support wheel driven by the motion cylinder provides auxiliary support to the steel pipe from the outside, forming a coordinated internal and external support system with the internal airbag, which further enhances the rigidity of the processing system and effectively suppresses vibration during the polishing process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure in the processing state of the present invention; Figure 3 This is a side view of the structure of the guide frame of the present invention.

[0016] In the diagram: 1. Processing table; 2. Guide rail; 3. Steel pipe conveyor belt; 4. Guide wheel; 5. Rotary cylinder; 6. Connecting rod; 7. Tilting frame; 8. Rotating block; 9. Motion cylinder; 10. Support wheel; 11. Guide frame; 12. Rotary wheel; 13. Polishing belt; 14. Inflatable airbag; 15. Positioning rod; 16. Power motor; 17. Guide groove. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] Please see Figure 1-3 The present invention provides a technical solution: an internal support device for processing thin-walled steel pipes, including a processing table 1, a guide rail 2 and a steel pipe conveyor belt 3 fixedly connected to one side of the processing table 1, two rotary cylinders 5 driven by a drive mechanism slidably connected to the side of the guide rail 2, the piston rod of the rotary cylinder 5 is fixedly connected to a flipping frame 7 through a connecting rod 6, a rotating block 8 is rotatably connected to the inner cavity of the flipping frame 7, a positioning rod 15 is fixedly connected to one side of the rotating block 8, and an inflatable airbag 14 is covered on the surface of the positioning rod 15; It also includes a polishing mechanism set on the surface of the processing table 1. The polishing mechanism includes two guide frames 11 fixed on the surface of the processing table 1. The two guide frames 11 are respectively distributed on both sides of the positioning rod 15. The inner cavity of the guide frame 11 is provided with a guide groove 17. The inner cavity of the guide groove 17 is slidably connected to a power motor 16 that is driven to move up and down by a cylinder. The output shaft end of the power motor 16 is fixedly connected to a rotating wheel 12. The surfaces of the two rotating wheels 12 are both connected to a polishing belt 13. In use, the steel pipe is transported by the steel pipe conveyor belt 3. At this time, rotating the right-side rotary cylinder 5 drives the tilting frame 7 to rotate to one side of the steel pipe conveyor belt 3. Then the steel pipe is transported to the inflatable sleeve on the surface of the positioning rod 15. The airbag 14 is placed on the right side, and then the right-side rotary cylinder 5 slides to the right on the guide rail 2, then flips and resets, driving the steel pipe to the side of the left-side positioning rod 15. Then the right-side rotary cylinder 5 slides to the left on the guide rail 2, driving the steel pipe to be fitted onto the left-side positioning rod 15. At this time, the two positioning rods 15 are connected together by the end clips. Then the airbag 14 is inflated and expands to support the inner wall of the steel pipe. The support wheel 10 is driven by the movement cylinder 9 to move and abut against the side wall of the steel pipe for support. Polishing is performed by the polishing belt 13. During the polishing process, the position of the steel pipe is adjusted by the left and right moving rotary cylinder 5 on the track, and then the steel pipe is rotated by rotating the rotating block 8.

[0019] The inflatable airbag 14 is connected to an external air pump through an air inlet pipe and has a built-in air pressure monitoring sensor.

[0020] The polishing belt 13 is located below the positioning rod 15. By adjusting the position of the two rotating wheels 12, the polishing belt 13 is moved to adjust its position, wrapping the lower surface of the steel pipe and polishing it by rotating the polishing belt 13.

[0021] The surface of the processing table 1 is provided with a support mechanism, which includes two motion cylinders 9 fixed on the surface of the processing table 1. One end of the piston rod of each of the two motion cylinders 9 is fixedly connected to a support wheel 10, and the two support wheels 10 are symmetrically arranged along both sides of the positioning rod 15.

[0022] The steel pipe conveyor belt 3 is rotatably connected to a guide wheel 4 on its side. The guide wheel 4 guides the steel pipe so that it can move and be fitted onto the surface of the positioning rod 15 on the right side.

[0023] The guide rail 2 is a linear slide rail structure. The bottom of the rotary cylinder 5 is fixedly connected to a slider that is adapted to slide along the guide rail 2. The drive mechanism is a transmission structure in which a drive motor and a transmission screw cooperate. The drive motor is fixed at the end of the guide rail 2, and the transmission screw is threadedly connected to the slider. The drive motor drives the transmission screw to rotate, thereby driving the rotary cylinder 5 to perform linear reciprocating motion along the guide rail 2.

[0024] Bearings are embedded at both ends of the inner cavity of the tilting frame 7. The two ends of the rotating block 8 are fixedly connected to the inner ring of the bearings. A self-rotating drive motor is fixedly connected to the outer side of the tilting frame 7. The output shaft of the self-rotating drive motor is fixedly connected to one end of the rotating block 8. The self-rotating drive motor drives the rotating block 8 to rotate along the bearing axis, thereby driving the positioning rod 15 and the steel pipe to rotate synchronously.

[0025] In use, the first stage of this invention involves automatic feeding and connection of the steel pipe. Thin-walled steel pipes are conveyed to the processing area by the steel pipe conveyor belt 3. The rotary cylinder 5 on the right side slides along the guide rail 2 to the appropriate position under the action of the drive mechanism. Its piston rod drives the tilting frame 7 to rotate via the connecting rod 6, causing the rotating block 8 fixed inside the tilting frame and its side positioning rod 15 to tilt towards the conveyor belt side. Guided by the guide wheel 4, the steel pipe on the conveyor belt is fitted onto the surface of the positioning rod. At this time, the inflatable airbag 14 is in an uninflated and contracted state, facilitating the insertion of the steel pipe. Subsequently, the tilting frame rotates in the opposite direction to reset, tilting the steel pipe from the conveyor belt side to the horizontal processing position.

[0026] Phase Two: Steel Pipe Transfer and Double Positioning Rod Connection The right-side rotary cylinder 5 slides to the right along the guide rail 2, causing the positioning rod with the sleeved steel pipe to move closer to the positioning rod on the left. The positioning rod of the left-side rotary cylinder 5 remains in a fixed position. When the steel pipe moves to the point where it is sleeved on the left positioning rod, the two positioning rods are inserted together inside the steel pipe through the end clamps to achieve axial positioning and centering.

[0027] Phase 3: Airbag inflation and internal support establishment After the positioning rods are inserted, an external air pump simultaneously inflates the airbags 14 on the surfaces of the two positioning rods through the air inlet pipe. The airbags expand and fit tightly against the inner wall of the steel pipe, providing uniform radial support force. The built-in air pressure monitoring sensor monitors the internal pressure of the airbags in real time to ensure that the support force is within the preset optimal range, providing sufficient rigid support without causing local deformation of the steel pipe due to excessive pressure.

[0028] Phase 4: External Polishing and Coordinated Internal and External Support Polishing mechanism activation: Driven by cylinders, the motors 16 within the two guide frames 11 slide downwards along the guide grooves 17, causing the rotating wheel 12 and polishing belt 13 to descend, thus enveloping the lower surface of the steel pipe. The motors drive the rotating wheel to rotate, causing the polishing belt to move at high speed to polish the steel pipe surface. Simultaneously, two moving cylinders 9 drive the support wheels 10 to move from both sides of the steel pipe towards the center, abutting against the side wall of the steel pipe. Together with the internal inflatable airbags, they form an internal and external clamping support system, effectively suppressing vibration during the polishing process.

[0029] Phase 5: Posture Adjustment and Polishing Coverage During the polishing process, the two rotary cylinders 5 can slide left and right along the guide rail 2 to adjust the axial position of the steel pipe, so that the polishing belt can cover the entire length of the steel pipe. At the same time, the rotating block 8 drives the positioning rod 15 to rotate, causing the steel pipe to rotate, which, together with the polishing belt, achieves full coverage polishing of the circumferential surface of the steel pipe.

[0030] Phase 6: Processing Completion and Material Unloading After polishing, the motion cylinder 9 drives the support wheel 10 to retract, the inflatable airbag 14 deflates and contracts, and the two rotary cylinders 5 move in opposite directions to disengage the positioning rod. The tilting frame 7 rotates to remove the steel pipe from the positioning rod, where it is picked up by the conveyor belt or a robotic arm and proceeds to the next process.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A thin-walled steel pipe machining internal support device, comprising a machining table (1), characterized in that: The processing table (1) is fixedly connected to a guide rail (2) and a steel pipe conveyor belt (3) on one side. The guide rail (2) is slidably connected to two rotary cylinders (5) driven by a drive mechanism. The piston rod of the rotary cylinder (5) is fixedly connected to a flipping frame (7) through a connecting rod (6). The inner cavity of the flipping frame (7) is rotatably connected to a rotating block (8). A positioning rod (15) is fixedly connected to one side of the rotating block (8). The surface of the positioning rod (15) is covered with an inflatable airbag (14). It also includes a polishing mechanism set on the surface of the processing table (1). The polishing mechanism includes two guide frames (11) fixed on the surface of the processing table (1). The two guide frames (11) are respectively distributed on both sides of the positioning rod (15). The inner cavity of the guide frame (11) is provided with a guide groove (17). The inner cavity of the guide groove (17) is slidably connected to a power motor (16) that is driven to move up and down by a cylinder. The output shaft end of the power motor (16) is fixedly connected to a rotating wheel (12). The surfaces of the two rotating wheels (12) are all connected to a polishing belt (13).

2. The apparatus for processing internal support of thin-walled steel pipe according to claim 1, characterized in that: The inflatable airbag (14) is connected to an external air pump through an air inlet pipe and has a built-in air pressure monitoring sensor.

3. The apparatus of claim 1, wherein: The polishing belt (13) is located below the positioning rod (15).

4. The apparatus of claim 1, wherein: The surface of the processing table (1) is provided with a support mechanism, which includes two motion cylinders (9) fixed on the surface of the processing table (1). One end of the piston rod of each of the two motion cylinders (9) is fixedly connected to a support wheel (10), and the two support wheels (10) are symmetrically arranged along both sides of the positioning rod (15).

5. The apparatus of claim 1, wherein: The steel pipe conveyor belt (3) is rotatably connected to a guide wheel (4) on its side, which guides the steel pipe.

6. The apparatus of claim 1, wherein: The guide rail (2) is a linear slide rail structure. The bottom of the rotary cylinder (5) is fixedly connected to a slider that is adapted to slide on the guide rail (2). The driving mechanism is a transmission structure in which a drive motor and a transmission screw cooperate. The drive motor is fixed at the end of the guide rail (2), and the transmission screw is threadedly connected to the slider. The drive motor drives the transmission screw to rotate, thereby driving the rotary cylinder (5) to make linear reciprocating motion along the guide rail (2).

7. The apparatus of claim 1, wherein: The inner cavity of the flipping frame (7) is fitted with bearings at both ends. The two ends of the rotating block (8) are fixedly connected to the inner ring of the bearings respectively. The outer side of the flipping frame (7) is fixedly connected with a self-rotating drive motor. The output shaft of the self-rotating drive motor is fixedly connected to one end of the rotating block (8). The self-rotating drive motor drives the rotating block (8) to rotate along the bearing axis, thereby driving the positioning rod (15) and the steel pipe to rotate synchronously.

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