Automatic pipe bending machine

Abstract

The present application belongs to the technical field of pipe bending, and particularly relates to an automatic pipe bending machine for circular pipes, comprising a machining table, a fixed frame fixedly connected to the front side of the machining table, a bending wheel rotatably connected to the fixed frame through a rotating shaft, the rotating shaft being driven by a driving assembly, a clamping mechanism arranged on the machining table, a fixing mechanism and a limiting mechanism arranged on the machining table and close to the bending wheel, and a horizontal supporting section arranged on the circumferential surface of the bending wheel and used for cooperating with the fixing mechanism to fix the bent pipe. The present application can avoid the spatial interference of the bent structure without replacing the contact block, greatly reduces the mold changing operation compared with the traditional mode of frequently replacing different types of contact block molds, saves the bending time, effectively improves the equipment utilization and the processing rhythm, and can effectively avoid the problems of insufficient clamping force, pipe slip or uneven deformation caused by insufficient contact area of the traditional small contact block, thereby ensuring the bending precision and product quality.

Description

Technical Field

[0001] This invention belongs to the field of circular tube bending technology, and particularly relates to an automatic circular tube bending machine. Background Technology

[0002] In the process of bending round tubes, the tube bending machine is a widely used key piece of equipment. In existing technology, multi-segment bending usually involves fixing the tube with a clamping mechanism and using bending wheels and abutment blocks to work together at a preset bending point, achieving local bending through concentric rotation. After completing one section of bending, the clamping device pushes the tube forward, positioning the next bending point in the processing position, and the bending operation is repeated.

[0003] However, this process has significant limitations in practical applications: when the distance between adjacent bending points on the pipe is too small, the bent structure may spatially interfere with the standard-sized contact block during subsequent processing, preventing the contact block from effectively fitting the pipe surface and hindering normal bending operations. The common solution is to replace it with a smaller contact block to avoid the interference area. While this method can solve the interference problem to some extent, it still has the following drawbacks: 1) Frequent tooling changes significantly increase bending time, affecting equipment utilization and processing speed. 2) The reduced contact area between the smaller contact block and the pipe may lead to insufficient clamping force, pipe slippage, or uneven deformation, thus affecting bending accuracy and quality.

[0004] Therefore, there is an urgent need for a pipe bending machine that can improve the processing capability and stability of multi-segment short-distance bending, while reducing reliance on mold changing operations, and ensuring the synergistic improvement of product quality and production efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automatic pipe bending machine for resolving the issues mentioned in the background section.

[0006] To achieve the above objectives, this application provides the following technical solution: The present invention provides an automatic pipe bending machine, including a processing table. A fixed frame is fixedly connected to the front side of the processing table. A bending wheel is rotatably connected to the fixed frame via a rotating shaft, which is driven by a drive assembly. A clamping mechanism is provided on the processing table. A fixing mechanism and a limiting mechanism are provided on the processing table near the bending wheel. A horizontal support section is provided on the circumferential surface of the bending wheel for cooperating with the fixing mechanism to fix the bent pipe. The fixing mechanism includes a mounting base fixedly connected to the rotating shaft via a connecting plate. Two first cylinders are provided on the mounting base. A contact block is fixedly connected to the telescopic end of each first cylinder. One first cylinder is slidably mounted on the mounting base via a transverse component, and the other first cylinder is rotatably mounted on the mounting base via an angle adjustment component. The first cylinder connected to the angle adjustment component rotates around the rotating shaft. The two contact blocks can be distributed at the beginning and end of the horizontal support section to work with the bending wheel to apply pressure to the bend. At the same time, the two contact blocks can also make way for the bend after bending through the lateral movement component and the angle adjustment component, so as to adjust the position of the two contact blocks and apply pressure to the bend again.

[0007] According to an advantageous embodiment, the clamping mechanism includes a second cylinder fixedly mounted on the processing table, a motor fixedly connected to the telescopic end of the second cylinder, and a three-jaw chuck fixedly connected to the output shaft of the motor.

[0008] According to an advantageous embodiment, the lateral movement assembly includes a rectangular guide seat fixedly mounted on a mounting base, a slide seat slidably mounted on the rectangular guide seat, a first cylinder fixedly mounted on the slide seat, and a third cylinder fixedly mounted on one side of the rectangular guide seat, the telescopic end of the third cylinder being fixedly connected to the slide seat.

[0009] According to an advantageous embodiment, the angle adjustment assembly includes an arc-shaped guide seat fixedly mounted on a mounting base, an arc-shaped slide plate slidably mounted on the arc-shaped guide seat, a first cylinder fixedly mounted on the upper side of the arc-shaped slide plate, and a locking component mounted on the base of the first cylinder, a drive gear rotatably mounted on the mounting base near the arc-shaped slide plate, and a plurality of evenly distributed tooth blocks fixedly mounted on the curved surface of the arc-shaped slide plate away from the center along its arc direction, the drive gear meshing with the plurality of tooth blocks, and a motor 2 fixedly mounted on the lower side of the mounting base, the output shaft of the motor 2 being fixedly connected to the drive gear 1.

[0010] According to an advantageous embodiment, both the arc-shaped guide seat and the arc-shaped slide plate rotate circumferentially around the pivot point via the mounting base.

[0011] According to an advantageous embodiment, the locking assembly includes a U-shaped pin, which is slidably disposed on the side wall of the lower base of the first cylinder. The upper end of the spring is fixedly connected to the side wall of the lower base of the first cylinder, and the lower end of the spring is fixedly connected to the surface of the corresponding vertical section of the U-shaped pin. An iron block is fixedly disposed on the upper side of the horizontal section of the U-shaped pin, and an electromagnet is fixedly disposed on the side wall of the lower base of the first cylinder above the iron block. A plurality of locking holes adapted to the U-shaped pin are fixedly disposed on the upper side of the arc-shaped guide seat.

[0012] According to an advantageous embodiment, the limiting mechanism includes a second mounting base fixedly disposed on one side of the processing table and located behind the first mounting base. A second rectangular guide seat is fixedly disposed on the second mounting base, and a second slide seat is slidably disposed on the second rectangular guide seat. A fourth cylinder is fixedly disposed on the upper side of the second slide seat. A U-shaped abutment plate is fixedly connected to the telescopic end of the fourth cylinder. A fifth cylinder is fixedly disposed on one side of the second rectangular guide seat, and the telescopic end of the fifth cylinder is fixedly connected to the second slide seat.

[0013] According to an advantageous embodiment, the drive assembly includes a second drive gear coaxially fixedly mounted on a rotating shaft, and a sixth cylinder is fixedly disposed inside the processing table near the front side. The telescopic end of the sixth cylinder is fixedly connected to a drive gear plate, which meshes with the second drive gear.

[0014] Compared with the prior art, the automatic tube bending machine provided by the present invention has the following beneficial effects: 1. In the present invention, the positions of the two contact blocks are adjusted by the horizontal movement component and the angle adjustment component. When the distance between adjacent bending points is too short, the front contact block can be controlled to move backward in the horizontal direction and the rear contact block can be controlled to rotate around the pivot to make room. The spatial interference of the bent structure can be avoided without replacing the contact blocks. Compared with the traditional method of frequently changing different types of contact block molds, the mold changing operation is greatly reduced, bending time is saved, and the equipment utilization rate and processing cycle are effectively improved.

[0015] 2. In this invention, two independent small-volume abutment blocks replace the traditional large-volume abutment blocks. The two independent small-volume abutment blocks can apply pressure to the two points of the bend, ensuring sufficient bending pressure on the bend. This effectively avoids the problems of insufficient clamping force, pipe slippage or uneven deformation caused by insufficient contact area of ​​traditional small abutment blocks, thus ensuring bending accuracy and product quality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention from an external first-view perspective.

[0017] Figure 2 This is a two-dimensional structural diagram of the present invention from an external second perspective.

[0018] Figure 3 This is a front view diagram of the structure in this invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the fixing mechanism in this invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the limiting mechanism in this invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the locking component in this invention.

[0022] Figure 7 This is a top view of the two contact blocks before the first section of the pipe is bent in this invention.

[0023] Figure 8 This is a top view of the two contact blocks when the first section of the pipe is bent in this invention.

[0024] Figure 9 This is a top view of the two contact blocks after their positions have been adjusted in this invention.

[0025] Figure 10 This is a top view of the first stage of the initial bending of the pipe after the positions of the two contact blocks are adjusted in this invention.

[0026] Figure 11 This is a top-view diagram of the second stage of the initial bending of the pipe after the positions of the two contact blocks are adjusted in this invention.

[0027] Figure 12 This is a top view of the pipe when the two contact blocks completely bend it in this invention.

[0028] Figure reference numerals: 1. Machining table; 2. Fixing frame; 3. Rotating shaft; 4. Bending wheel; 41. Horizontal support section; 5. Drive assembly; 51. Drive gear two; 52. Drive gear plate; 6. Clamping mechanism; 61. Second cylinder; 62. Three-jaw chuck; 7. Fixing mechanism; 71. Connecting plate; 72. Mounting seat one; 73. First cylinder; 74. Abutting block; 75. Lateral movement assembly; 751. Rectangular guide seat one; 752. Slide one; 753. First cylinder; Three cylinders; 76. Angle adjustment assembly; 761. Arc-shaped guide seat; 762. Arc-shaped slide plate; 763. Locking assembly; 7631. U-shaped pin; 7632. Spring; 7633. Iron block; 7634. ​​Electromagnet; 764. Drive gear one; 8. Limiting mechanism; 81. Mounting seat two; 82. Rectangular guide seat two; 83. Slide two; 84. Fourth cylinder; 85. Contact plate; 86. Fifth cylinder; 9. Locking hole; 10. Bend. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 12 This application will now be described in further detail.

[0030] Please refer to the following: Figure 1 and Figure 2 An automatic pipe bending machine includes a processing table 1, a fixed frame 2 fixedly connected to the front side of the processing table 1, a bending wheel 4 rotatably connected to the fixed frame 2 via a rotating shaft 3, the rotating shaft 3 being driven by a drive assembly 5, a clamping mechanism 6 being provided on the processing table 1, a fixing mechanism 7 and a limiting mechanism 8 being provided on the processing table 1 and near the bending wheel 4, and a horizontal support section 41 being provided on the peripheral surface of the bending wheel 4 for cooperating with the fixing mechanism 7 to fix the bent pipe 10.

[0031] In actual operation, the bending tube 10 is fixed by the clamping mechanism 6 and one end of the bending tube 10 is moved to the outside of the bending wheel 4 to fit together. Then, the predetermined position of the bending tube 10 is fixed and limited by the fixing mechanism 7 and the limiting mechanism 8. The fixing mechanism 7 and the bending wheel 4 are driven to rotate by the driving component 5 to bend the bending tube 10.

[0032] See Figure 1 The drive assembly 5 includes a second drive gear 51 coaxially fixedly mounted on the rotating shaft 3. A sixth cylinder (not shown in the figure) is fixedly installed inside the processing table 1 near the front side. The telescopic end of the sixth cylinder is fixedly connected to a drive gear plate 52, which meshes with the second drive gear 51. The sixth cylinder controls the sliding of the drive gear plate 52 to drive the second drive gear 51 to rotate, so that the rotating shaft 3 can drive the bending wheel 4 and the fixing mechanism 7 to rotate.

[0033] See Figure 1 and Figure 8 The clamping mechanism 6 includes a second cylinder 61 fixedly mounted on the processing table 1. The telescopic end of the second cylinder 61 is fixedly connected to a motor, and a three-jaw chuck 62 is fixedly connected to the output shaft of the motor. One end of the bent tube 10 is fixed by the three-jaw chuck 62, and the bent tube 10 is rotated by the motor driving the three-jaw chuck 62.

[0034] See Figures 1-4 The fixing mechanism 7 includes a mounting base 72 fixedly connected to the rotating shaft 3 via a connecting plate 71. Two first cylinders 73 are provided on the mounting base 72. The telescopic end of the first cylinder 73 is fixedly connected to an abutment block 74. One first cylinder 73 is slidably mounted on the mounting base 72 via a transverse component 75, and the other first cylinder 73 is rotatably mounted on the mounting base 72 via an angle adjustment component 76. The first cylinder 73 connected to the angle adjustment component 76 rotates around the rotating shaft 3.

[0035] In actual operation, during the first bending stage: the very front end of the round tube moves to the horizontal support section 41 on the bending wheel 4 via the second cylinder 61, as shown below. Figure 7 As shown. Simultaneously, the two contact blocks 74 extend towards the surface of the circular tube via the first cylinder 73 and abut against different positions at the front end of the circular tube, as... Figure 8 As shown. The limiting mechanism 8 limits the remaining part of the round tube. Finally, the rotating shaft 3 rotates, causing the bending wheel 4 and the mounting base 72 to rotate in the same circle, so that the mounting base 72 drives the two abutment blocks 74 to rotate and cooperate with the bending wheel 4 to bend the front end of the bent tube 10.

[0036] When bending the second section: 1. If the next bending point of the round tube is long enough from the first bending point.

[0037] After the two contact blocks 74 and the limiting mechanism 8 separate from the bend 10, the second cylinder 61 extends, causing the bend 10 to move forward a certain distance and controlling the overall rotation of the bend 10 to adjust the position of the bent section. The next bending point of the bend 10 is then moved toward the bending wheel 4 and finally to the predetermined position. The bending process is repeated using the same method as the previous bending, and this cycle continues.

[0038] Second, if the next bend in the round tube is too short from the first bend.

[0039] Step 1, Position Adjustment: The two contact blocks 74 and the limiting mechanism 8 first separate from the bend 10. Then, the front contact block 74 moves backward via the lateral movement component 75, while the rear contact block 74 rotates a certain angle around the pivot 3 via the angle adjustment component 76 to make room, so that the front contact block 74 moves to the position of the rear contact block 74. The rear contact block 74 rotates and adjusts to the next position, such as... Figure 9 As shown.

[0040] The second step involves initial bending. Finally, the second cylinder 61 extends, moving the bent tube 10 forward a certain distance and controlling its rotation to adjust the position of the bent section of the tube 10. At this time, the first contact block 74, driven by the corresponding first cylinder 73, abuts against the designated position of the tube 10, while the second contact block 74 does not contact the surface of the tube 10. Figure 10 As shown. Then, the two contact blocks 74 and the bending wheel 4 rotate together along the center of the rotating shaft 3 at a certain angle, while being limited by the limiting mechanism 8, thus initially bending the pipe 10 (not completely bending), as shown. Figure 11 As shown.

[0041] The third step is complete bending. After the initial bending, the second bending section of the bent pipe 10 forms a curved section. At this point, the next contact block 74 is driven by the corresponding first cylinder 73 to move to the surface of the curved section and make contact. The two contact blocks 74 simultaneously apply pressure to fix the bent pipe 10. Then, in conjunction with the bending wheel 4 and the limiting mechanism 8, the bent pipe 10 is completely bent and formed at this point. Figure 12 As shown.

[0042] Subsequently, the bending of pipe 10 is switched between the two bending scenarios.

[0043] It should be noted that although this solution adds more steps compared to the traditional bending machine method, it still improves bending efficiency while ensuring bending quality, compared to the method of replacing the contact block 74 when bending the pipe 10.

[0044] See Figure 2 and Figure 4 The lateral movement assembly 75 includes a rectangular guide seat 751 fixedly mounted on the mounting base 72, a slide block 752 slidably mounted on the rectangular guide seat 751, a first cylinder 73 fixedly mounted on the slide block 752, and a third cylinder 753 fixedly mounted on one side of the rectangular guide seat 751, with the telescopic end of the third cylinder 753 fixedly connected to the slide block 752. The third cylinder 753 controls the slide block 752 to slide within the rectangular guide seat 751, thereby causing the front abutment block 74 to move horizontally back and forth to adjust its position.

[0045] See Figure 2 and Figure 4 The angle adjustment component 76 includes an arc-shaped guide seat 761 fixedly mounted on a mounting base 72. An arc-shaped slide plate 762 is slidably mounted on the arc-shaped guide seat 761. A first cylinder 73 is fixedly mounted on the upper side of the arc-shaped slide plate 762, and a locking component 763 is provided on the base of the first cylinder 73. A drive gear 764 is rotatably mounted on the mounting base 72 near the arc-shaped slide plate 762. Multiple evenly distributed tooth blocks are fixedly mounted on the curved surface of the arc-shaped slide plate 762 away from the center along its arc direction. The drive gear 764 meshes with the multiple tooth blocks. A second motor is fixedly mounted on the lower side of the mounting base 72, and the output shaft of the second motor is fixedly connected to the drive gear 764. Both the arc-shaped guide seat 761 and the arc-shaped slide plate 762 rotate circumferentially around the pivot 3 through the mounting base 72. At the same time, the arc-shaped slide plate 762 can slide relative to the arc-shaped guide seat 761.

[0046] The drive gear 764 is rotated by the motor 2. The drive gear 764 cooperates with the toothed block on the outside of the arc-shaped slide plate 762 to control the arc-shaped slide plate 762 to slide along the arc-shaped guide seat 761 with the rotating shaft 3 as the center, thereby driving the next abutment block 74 to adjust its position.

[0047] See Figure 4 and Figure 6To ensure the stability of the subsequent contact block 74 when it contacts the bend 10, the locking assembly 763 includes a U-shaped pin 7631. The U-shaped pin 7631 is slidably disposed on the side wall of the lower base of the first cylinder 73. Springs 7632 are sleeved on both vertical sections of the U-shaped pin 7631. The upper end of the spring 7632 is fixedly connected to the side wall of the lower base of the first cylinder 73, and the lower end of the spring 7632 is fixedly connected to the surface of the corresponding vertical section of the U-shaped pin. An iron block 7633 is fixedly disposed on the upper side of the horizontal section of the U-shaped pin 7631. An electromagnet 7634 is fixedly disposed on the side wall of the lower base of the first cylinder 73 and above the iron block 7633. Multiple sets of locking holes 9 adapted to the U-shaped pin 7631 are fixedly disposed on the upper side of the arc-shaped guide seat 761. The U-shaped pin 7631 is inserted into the locking hole 9 on the upper side of the arc-shaped guide seat 761, locking the arc-shaped slide plate 762 and the arc-shaped guide seat 761 relative to each other to ensure their stability. When the arc-shaped slide plate 762 needs to slide, the attraction force generated by the electromagnet 7634 attracts the iron block 7633 to move the U-shaped pin 7631 upward, controlling the U-shaped pin 7631 to exit the locking hole 9, so that the arc-shaped slide plate 762 can slide within the arc-shaped guide seat 761.

[0048] See Figure 2 and Figure 5 The limiting mechanism 8 includes a second mounting base 81 fixedly mounted on one side of the processing table 1 and located behind the first mounting base 72. A rectangular guide seat 82 is fixedly mounted on the second mounting base 81, and a slide seat 83 is slidably mounted on the rectangular guide seat 82. A fourth cylinder 84 is fixedly mounted on the upper side of the slide seat 83. A U-shaped abutment plate 85 is fixedly connected to the telescopic end of the fourth cylinder 84. A fifth cylinder 86 is fixedly mounted on one side of the rectangular guide seat 82, and the telescopic end of the fifth cylinder 86 is fixedly connected to the slide seat 83. Before the bending tube 10 is bent, the fourth cylinder 84 controls the abutment plate 85 to abut against the surface of the bending tube 10, limiting the bending tube 10 during bending. The fifth cylinder 86 controls the movement of the slide seat 83, causing the abutment plate 85 to move with the bending tube 10 during bending.

[0049] This solution uses the horizontal movement component 75 and angle adjustment component 76 of the fixed mechanism 7 to control the front abutment block 74 to move backward in the horizontal direction and the rear abutment block 74 to rotate around the pivot 3 to make room when the distance between adjacent bending points is too short. This avoids spatial interference of the bent structure without replacing the abutment block 74. Compared with the traditional method of frequently replacing small-sized abutment blocks 74, this solution greatly reduces mold changing operations, saves bending time, and effectively improves equipment utilization and processing cycle time.

[0050] By having two abutting blocks 74 engage at different positions on the bend 10, bending pressure at the bend can be maintained. This effectively avoids the problems of insufficient clamping force, pipe slippage, or uneven deformation caused by insufficient contact area of ​​traditional small abutting blocks 74, ensuring bending accuracy and product quality.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic pipe bending machine, characterized in that, The device includes a processing table, a fixed frame is fixedly connected to the front side of the processing table, a bending wheel is rotatably connected to the fixed frame via a rotating shaft, the rotating shaft is driven by a drive assembly, a clamping mechanism is provided on the processing table, a fixing mechanism and a limiting mechanism are provided on the processing table near the bending wheel, and a horizontal support section is provided on the peripheral surface of the bending wheel for cooperating with the fixing mechanism to fix the round tube. The fixing mechanism includes a mounting base 1 fixedly connected to a rotating shaft via a connecting plate. Two first cylinders are provided on the mounting base 1. A contact block is fixedly connected to the telescopic end of each first cylinder. One first cylinder is slidably mounted on the mounting base 1 via a transverse component. The other first cylinder is rotatably mounted on the mounting base 1 via an angle adjustment component. The first cylinder connected to the angle adjustment component rotates around the rotating shaft as the center. The angle adjustment assembly includes an arc-shaped guide seat fixedly mounted on a mounting base one, an arc-shaped slide plate slidably mounted on the arc-shaped guide seat, a first cylinder fixedly mounted on the upper side of the arc-shaped slide plate, and a locking assembly mounted on the base of the first cylinder, a drive gear one rotatably mounted on the mounting base one near the position of the arc-shaped slide plate, and multiple evenly distributed tooth blocks fixedly mounted on the curved surface of the arc-shaped slide plate away from the center along its arc direction, the drive gear one meshing with the multiple tooth blocks, and a motor two fixedly mounted on the lower side of the mounting base one, the output shaft of the motor two being fixedly connected to the drive gear one; The two contact blocks can be distributed at the beginning and end of the horizontal support section to work with the bending wheel to apply pressure to the round tube. At the same time, the two contact blocks can also make way for the bent round tube through the lateral movement component and the angle adjustment component, so as to adjust the position of the two contact blocks and apply pressure to the round tube again.

2. The automatic pipe bending machine according to claim 1, characterized in that, The clamping mechanism includes a second cylinder fixedly mounted on the processing table. The telescopic end of the second cylinder is fixedly connected to a motor, and a three-jaw chuck is fixedly connected to the output shaft of the motor.

3. The automatic pipe bending machine according to claim 1, characterized in that, The lateral movement assembly includes a rectangular guide seat fixedly mounted on a mounting base, a slide block slidably mounted on the rectangular guide seat, a first cylinder fixedly mounted on the slide block, and a third cylinder fixedly mounted on one side of the rectangular guide seat, with the telescopic end of the third cylinder fixedly connected to the slide block.

4. The automatic pipe bending machine according to claim 1, characterized in that, Both the arc-shaped guide seat and the arc-shaped slide plate rotate 1 circumferentially around the pivot point through the mounting base.

5. The automatic pipe bending machine according to claim 1, characterized in that, The locking assembly includes a U-shaped pin, which is slidably disposed on the side wall of the lower base of the first cylinder. The upper end of the spring is fixedly connected to the side wall of the lower base of the first cylinder, and the lower end of the spring is fixedly connected to the surface of the corresponding vertical section of the U-shaped pin. An iron block is fixedly disposed on the upper side of the horizontal section of the U-shaped pin, and an electromagnet is fixedly disposed on the side wall of the lower base of the first cylinder above the iron block. Multiple sets of locking holes adapted to the U-shaped pin are fixedly disposed on the upper side of the arc-shaped guide seat.

6. The automatic pipe bending machine according to claim 1, characterized in that, The limiting mechanism includes a second mounting base fixedly mounted on one side of the processing table and located behind the first mounting base. A second rectangular guide seat is fixedly mounted on the second mounting base, and a second slide seat is slidably mounted on the second rectangular guide seat. A fourth cylinder is fixedly mounted on the upper side of the second slide seat. A U-shaped abutment plate is fixedly connected to the telescopic end of the fourth cylinder. A fifth cylinder is fixedly mounted on one side of the second rectangular guide seat, and the telescopic end of the fifth cylinder is fixedly connected to the second slide seat.

7. The automatic pipe bending machine according to claim 1, characterized in that, The drive assembly includes a second drive gear coaxially fixedly mounted on a rotating shaft. A sixth cylinder is fixedly installed inside the processing table near the front side. The telescopic end of the sixth cylinder is fixedly connected to a drive gear plate, which meshes with the second drive gear.

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