Five-axis pipe bending machine with size adjusting function and implementation method of five-axis pipe bending machine

Abstract

The invention discloses a five-axis pipe bending machine with a size adjusting function and an implementation method thereof.The five-axis pipe bending machine comprises a workbench, axis bodies, movable frame bases and fixed frame bases, the five axis bodies are arranged on the workbench, the five axis bodies comprise two fixed axis bodies and three movable axis bodies, the fixed frame bases are arranged below the two fixed axis bodies, and the movable frame bases are arranged below the two fixed axis bodies. And movable frame bases are arranged below the three movable shaft bodies. According to the five-axis pipe bending machine with the size adjusting function and the implementation method of the five-axis pipe bending machine, through threaded connection between a movable platform and a stepping screw rod, the stepping screw rod drives the movable platform and a shaft body above the movable platform to move, so that the distance between the moved shaft body and the shaft body with the fixed position is increased, and the size of the pipe bending machine is adjusted; according to the pipe bending machine, the size of the groove formed in the outer side of the shaft body can be adjusted in the mode that the shaft body is divided and adjusted, the adaptability of equipment to steel pipes with different pipe diameters is improved, and therefore the groove in the outer side of the shaft body can contain the steel pipe with the large size to conduct pipe bending operation.

Description

Technical Field

[0001] The present invention relates to the technical field of five-axis pipe bending machines, and in particular to a five-axis pipe bending machine with a size adjustment function and an implementation method thereof. Background Art

[0002] When the five-axis pipe bending machine is bending steel pipes, there is a problem that the size of the groove in the shaft body is fixed and cannot be adjusted according to the size of the steel pipe, resulting in a poor clamping effect.

[0003] The main reason is that when the existing five-axis pipe bending machine performs pipe bending operations, it is first necessary to transport the steel pipe that needs to be bent between the two shaft bodies. There are grooves between the shaft bodies to accommodate the steel pipe to enter the grooves. The steel pipe is clamped and transported at the same time by the relative rotation between the two shaft bodies. However, in the long-term use of the five-axis pipe bending machine, it is found that because the size of the groove on the shaft body is fixed, when a steel pipe of the same size as the groove is transported, the groove in the shaft body can properly accommodate the steel pipe for transportation. If a smaller steel pipe is encountered, the distance between the two relative shaft bodies can also be adjusted so that the grooves in the two shaft bodies can completely accommodate the steel pipe for clamping and transportation. However, when a larger steel pipe is encountered, the groove in the shaft body cannot accommodate the steel pipe, resulting in the clamping between the steel pipe and the shaft body relying on the positioning clamping between two points. Such clamping is not stable enough and the effect is poor, and it is easy to have deviations and other problems when performing pipe bending operations. Summary of the invention

[0004] The purpose of the present invention is to provide a five-axis pipe bending machine with size adjustment function and its implementation method, so as to solve the problem raised in the above background technology that when encountering a larger steel pipe, the groove in the shaft body cannot accommodate the steel pipe, resulting in the clamping between the steel pipe and the shaft body relying on the positioning clamping between two points, and such clamping is not stable enough and the effect is poor.

[0005] To achieve the above object, the present invention proposes the following scheme:

[0006] A five-axis pipe bending machine with size adjustment function comprises a workbench, an axis body, a movable frame base and a fixed frame base, wherein the workbench is provided with five axis bodies, of which two are fixed axis bodies and three are movable axis bodies, a fixed frame base is provided below the two fixed axis bodies, a movable frame base is provided below the three movable axis bodies, an upper part of the axis body is provided with a liftable adjustment half frame, a rotating column is provided on the top of the adjustment half frame, the rotating column is movably installed in the adjustment half frame, a stabilizing frame is fixedly connected to the bottom end of the rotating column, and the stabilizing frame is movably installed in the adjustment half frame, The bottom end of the fixed frame is fixedly connected with a central axis, which passes through the adjusting half frame and is inserted into the center of the shaft body, and the central axis and the shaft body are movably connected. The outer side of the central axis is fixedly connected with a central gear, and side gears are provided on both sides of the central gear, and the side gears and the central gear are meshed with each other. The two side gears are penetrated by threaded rods, and one of the threaded rods is provided with a forward thread on the outer side, and the threaded rod is threadedly connected to the adjusting half frame through the forward thread, and the other threaded rod is provided with a reverse thread on the outer side, and the threaded rod is threadedly connected to the adjusting half frame through the reverse thread.

[0007] A telescopic inner rod is provided on the top of the side gear, and the telescopic inner rod is movably inserted in the side gear. The top end of the telescopic inner rod is fixedly installed on the adjustment half frame through an end head, and the bottom end of the threaded rod is fixedly installed on the shaft body through an end head.

[0008] A moving platform is provided above the mobile frame base, and a driving motor is fixedly installed in the moving platform. A limit chuck is provided above the driving motor, and the shaft is located above the limit chuck. The driving motor drives the shaft to rotate, and the moving platform is penetrated by a stepping screw, and the moving platform and the stepping screw are threadedly connected. One end of the stepping screw is connected to the stepping motor, and the other end of the stepping screw is movably installed on the moving frame base. Auxiliary rods are provided on both sides of the stepping screw, and the moving platform is also penetrated by two auxiliary rods. The moving platform and the auxiliary rods are slidably connected, and the two auxiliary rods are parallel to the stepping screws, and both ends of the auxiliary rods are fixedly installed on the moving frame base.

[0009] A stabilizing transverse plate is provided inside the adjusting half frame, and the outer side of the stabilizing transverse plate is fixedly connected to the adjusting half frame. The stabilizing transverse plate is connected to two threaded rods in a forward threaded connection and a reverse threaded connection respectively like the adjusting half frame.

[0010] A clamping plate is arranged at the bottom end of the position-limiting clamping disc, and the clamping plate is clamped into a clamping slot provided on the workbench, and the clamping plate slides along the clamping slot when moving.

[0011] The outer surface of the central axis at the bottom end of the stable frame is provided with a scale, and the part of the central axis engraved with the scale is movably inserted in the axis body.

[0012] The present invention provides a technical solution, a method for implementing a five-axis pipe bending machine with a size adjustment function, comprising the following steps:

[0013] Step 1: When the pipe needs to be bent, the steel pipe is placed between two fixed shafts and two movable shafts. The two sets of shafts are driven inward by the driving motor. The two sets of shafts clamp the steel pipe to move it. Finally, the bending effect is achieved under the guidance of the last independent shaft.

[0014] Step 2: When there is a difference in size between the steel pipe to be bent and the inner groove of the shaft body, the rotating column is manually rotated, and the rotating column drives the stable frame to rotate in the adjustment half frame;

[0015] Step 3: At the same time, the rotating column drives the central shaft to rotate, and the central shaft drives the central gear to rotate. Through the meshing connection between the central gear and the side gears, the central gear drives the side gears on both sides to rotate. After the side gears rotate, they drive the threaded rods inside them to rotate, one of the threaded rods rotates forward, and the other threaded rod rotates reversely;

[0016] Step 4: Use two threaded rods to connect the adjusting half frame and the stabilizing horizontal plate with forward and reverse threads respectively, so that the two threaded rods synchronously drive the adjusting half frame to rise, so that the groove on the outside of the shaft body and the groove on the outside of the adjusting half frame are separated from each other, and a larger steel pipe can be accommodated between the two grooves;

[0017] Step 5: Start the stepper motor at the same time to drive the stepper screw to rotate. Through the threaded connection between the mobile platform and the stepper screw, the stepper screw drives the mobile platform and the shaft above it to move, so that the distance between the moved shaft and the fixed shaft is increased, which can accommodate larger steel pipes for bending operations.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The five-axis pipe bending machine with size adjustment function and the implementation method thereof of the present invention can adjust the size of the groove on the outer side of the shaft body by dividing and adjusting the shaft body, thereby improving the adaptability of the equipment to steel pipes of different diameters, so that the groove on the outer side of the shaft body can accommodate steel pipes of larger sizes for pipe bending operations;

[0020] The stabilizing frame is fixedly connected to the central axis, the central axis passes through the adjusting half frame and is movably connected to the shaft body, and the stabilizing cross plate is connected to the adjusting half frame and the threaded rod through threads, so that the adjusting half frame can remain stable during the lifting process without shaking or deviation, thereby improving the accuracy and quality of the pipe bending operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the present invention as a whole;

[0022] Figure 2 It is a bottom schematic diagram of the present invention as a whole;

[0023] Figure 3 A cross-sectional view of the present invention as a whole;

[0024] Figure 4 It is a structural schematic diagram of the mobile frame base of the present invention;

[0025] Figure 5 is a three-dimensional diagram of the shaft body of the present invention;

[0026] Figure 6 is a cross-sectional view of the shaft body of the present invention;

[0027] Figure 7 It is a schematic diagram of adjusting the shaft body of the present invention;

[0028] Figure 8 It is a three-dimensional diagram of the side gear of the present invention.

[0029] In the figure: 1. workbench; 2. shaft; 21. adjustment half frame; 22. rotating column; 23. stabilizing frame; 24. center gear; 25. side gear; 26. threaded rod; 27. stabilizing horizontal plate; 28. telescopic inner rod; 3. mobile frame base; 31. mobile platform; 32. driving motor; 33. limit chuck; 34. stepping motor; 35. stepping screw; 36. auxiliary rod; 4. fixed frame base. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-8A five-axis pipe bending machine with size adjustment function and its implementation method, comprising a workbench 1, a shaft body 2, a movable frame base 3 and a fixed frame base 4. Five shaft bodies 2 are arranged on the workbench 1, and there are two fixed shaft bodies 2 and three movable shaft bodies 2. The two fixed shaft bodies 2 are provided with a fixed frame base 4 below, and the three movable shaft bodies 2 are provided with a movable frame base 3 below. When bending a pipe is required, a steel pipe is placed between the two fixed shaft bodies 2 and the two movable shaft bodies 2, and the two groups of shaft bodies 2 are driven inward by a driving motor 32. The two groups of shaft bodies 2 clamp the steel pipe to make it move, and finally the bending effect is achieved under the guidance of the last independent shaft body 2. The upper part of the shaft body 2 is provided with a liftable adjustment half frame 21. A rotating column 22 is provided at the top of the adjusting half frame 21, and the rotating column 22 is movably installed in the adjusting half frame 21. The bottom end of the rotating column 22 is fixedly connected to a stabilizing frame 23, and the stabilizing frame 23 is movably installed in the adjusting half frame 21. The bottom end of the stabilizing frame 23 is fixedly connected to a central axis, and the central axis penetrates the adjusting half frame 21 and is inserted into the center of the shaft body 2, and the central axis and the shaft body 2 are movably connected. A central gear 24 is fixedly connected to the outer side of the central axis, and side gears 25 are provided on both sides of the central gear 24. The side gears 25 and the central gear 24 are meshed with each other. The two side gears 25 are penetrated by threaded rods 26, and one of the threaded rods 26 is provided with a positive thread on the outer side. The threaded rod 26 is threaded with the adjusting half frame 21 through the positive thread. The outer side of the other threaded rod 26 is provided with a reverse thread, and the threaded rod 26 is threadedly connected with the adjusting half frame 21 through the reverse thread. When there is a difference in size between the steel pipe to be bent and the inner groove of the shaft body 2, the rotating column 22 is manually rotated, and the rotating column 22 drives the stabilizing frame 23 to rotate in the adjusting half frame 21. At the same time, the rotating column 22 drives the central shaft to rotate, and the central shaft drives the central gear 24 to rotate. Through the meshing connection between the central gear 24 and the side gear 25, the central gear 24 drives the side gears 25 on both sides to rotate respectively. After the side gears 25 rotate, they respectively drive the threaded rods 26 inside them to rotate. One of the threaded rods 26 rotates forward, and the other threaded rod 26 rotates forward. Reverse rotation, through the two threaded rods 26 respectively connected with the adjusting half frame 21 and the stabilizing cross plate 27 by forward and reverse threads, the two threaded rods 26 synchronously drive the adjusting half frame 21 to rise, so that the groove on the outside of the shaft body 2 is separated from the groove on the outside of the adjusting half frame 21, and is fixedly connected to the central axis through the stabilizing frame 23. The central axis passes through the adjusting half frame 21 and is movably connected to the shaft body 2. The stabilizing cross plate 27 is connected with the adjusting half frame 21 and the threaded rods 26 by threads, so that the adjusting half frame 21 can remain stable during the lifting process without shaking or deviation, thereby improving the accuracy and quality of the pipe bending operation, and the two grooves can accommodate larger steel pipes. At the same time, the stepping motor 34 is started to drive the stepping screw 35 to rotate.Through the threaded connection between the mobile platform 31 and the stepping screw 35, the stepping screw 35 drives the mobile platform 31 and the shaft body 2 above it to move, so that the distance between the moved shaft body 2 and the fixed shaft body 2 is increased. The size of the groove on the outside of the shaft body 2 can be adjusted by dividing and adjusting the shaft body 2, which improves the adaptability of the equipment to steel pipes of different diameters, so that the groove on the outside of the shaft body 2 can accommodate steel pipes of larger sizes for pipe bending operations.

[0032] A telescopic inner rod 28 is provided at the top of the side gear 25. The telescopic inner rod 28 is movably inserted in the side gear 25, and the top end of the telescopic inner rod 28 is fixedly installed in the adjusting half frame 21 through the end head. At the same time, the bottom end of the threaded rod 26 is fixedly installed on the shaft body 2 through the end head. When the adjusting half frame 21 is raised or lowered, the telescopic inner rod 28 is extended or retracted inside the threaded rod 26 to maintain the stability of the lifting and lowering.

[0033] A moving platform 31 is provided above the moving frame base 3, a driving motor 32 is fixedly installed in the moving platform 31, a limit chuck 33 is provided above the driving motor 32, the shaft body 2 is located above the limit chuck 33, the driving motor 32 drives the shaft body 2 to rotate, the moving platform 31 is penetrated by a stepping screw 35, the moving platform 31 and the stepping screw 35 are threadedly connected, one end of the stepping screw 35 is connected to the stepping motor 34, and the other end of the stepping screw 35 is movably installed on the moving frame base 3, and auxiliary rods 3 are provided on both sides of the stepping screw 35. 6. The moving platform 31 is also penetrated by two auxiliary rods 36. The moving platform 31 and the auxiliary rods 36 are slidably connected, and the two auxiliary rods 36 are parallel to each other with the stepping screw 35. Both ends of the auxiliary rods 36 are fixedly mounted on the moving frame base 3. Through the threaded connection between the moving platform 31 and the stepping screw 35, the stepping screw 35 drives the moving platform 31 and the shaft body 2 above it to move, so that the distance between the moved shaft body 2 and the fixed shaft body 2 is increased, so that larger steel pipes can be accommodated for pipe bending operations.

[0034] A stabilizing cross plate 27 is provided inside the adjusting half frame 21, and the outer side of the stabilizing cross plate 27 is fixedly connected to the adjusting half frame 21. The stabilizing cross plate 27 is connected to the two threaded rods 26 in a forward threaded connection and a reverse threaded connection like the adjusting half frame 21, and is fixedly connected to the central axis through a stabilizing frame 23. The central axis passes through the adjusting half frame 21 and is movably connected to the shaft body 2. The stabilizing cross plate 27 is threadedly connected to the adjusting half frame 21 and the threaded rods 26, so that the adjusting half frame 21 can remain stable during the lifting process without shaking or deviation.

[0035] A card plate is provided at the bottom end of the limit chuck 33, which is inserted into a card slot provided on the workbench 1. The card plate slides along the card slot when moving, thereby maintaining the stability of the limit chuck 33 during movement and limiting the displacement of the limit chuck 33 during movement.

[0036] A scale is provided on the outer surface of the central axis at the bottom of the stabilizing frame 23, and the portion of the central axis engraved with the scale is movably inserted in the shaft body 2. When the central axis follows the adjustment half frame 21 to rise and fall, the size of the rise and fall can be clearly observed.

[0037] The specific operation process is as follows: Step 1: When it is necessary to bend a pipe, place the steel pipe between two fixed shaft bodies 2 and two movable shaft bodies 2, and drive the two sets of shaft bodies 2 to rotate inward through the driving motor 32. The two sets of shaft bodies 2 clamp the steel pipe to make it move, and finally, under the guidance of the last independent shaft body 2, the pipe bending effect is achieved; Step 2: When there is a difference in size between the steel pipe to be bent and the inner groove of the shaft body 2, the rotating column 22 is manually rotated, and the rotating column 22 drives the stabilizing frame 23 to rotate in the adjusting half frame 21; Step 3: At the same time, the rotating column 22 drives the central axis to rotate, and the central axis drives the central gear 24 to rotate. Through the meshing connection between the central gear 24 and the side gear 25, the central gear 24 drives the side gears 25 on both sides to rotate, and the side gears 25 rotate After that, they respectively drive the threaded rods 26 inside to rotate, one of the threaded rods 26 rotates forwardly, and the other threaded rod 26 rotates reversely; the fourth step: the two threaded rods 26 are respectively connected with the adjusting half frame 21 and the stabilizing horizontal plate 27 by forward and reverse threads, so that the two threaded rods 26 synchronously drive the adjusting half frame 21 to rise, so that the groove on the outside of the shaft body 2 is separated from the groove on the outside of the adjusting half frame 21, and a larger steel pipe can be accommodated between the two grooves; the fifth step: at the same time, start the stepping motor 34 to drive the stepping screw 35 to rotate, and through the threaded connection between the moving platform 31 and the stepping screw 35, the stepping screw 35 drives the moving platform 31 and the shaft body 2 above it to move, so that the distance between the moved shaft body 2 and the fixed shaft body 2 is increased, so that a larger steel pipe can be accommodated for bending operations.

[0038] In summary, the present invention proposes a five-axis pipe bending machine with size adjustment function and its implementation method. When the pipe needs to be bent, the steel pipe is placed between two fixed shaft bodies 2 and two movable shaft bodies 2, and the two sets of shaft bodies 2 are driven to rotate inward by the driving motor 32. The two sets of shaft bodies 2 clamp the steel pipe to make it move, and finally the pipe bending effect is achieved under the guidance of the last independent shaft body 2. When there is a difference in size between the steel pipe to be bent and the inner groove of the shaft body 2, the rotating column 22 is manually rotated, and the rotating column 22 is driven to rotate inward. The dynamic stabilization frame 23 rotates in the adjustment half frame 21, and the rotating column 22 drives the central shaft to rotate, and the central shaft drives the central gear 24 to rotate. Through the meshing connection between the central gear 24 and the side gears 25, the central gear 24 drives the side gears 25 on both sides to rotate. After the side gears 25 rotate, they drive the threaded rods 26 inside them to rotate, one of the threaded rods 26 rotates forward, and the other threaded rod 26 rotates reversely. The two threaded rods 26 are respectively connected with the adjustment half frame 21 and the stabilization cross plate 27 in a positive direction. The forward thread is connected with the reverse thread, so that the two threaded rods 26 synchronously drive the adjustment half frame 21 to rise, so that the groove on the outside of the shaft body 2 is separated from the groove on the outside of the adjustment half frame 21, and is fixedly connected to the central axis through the stabilizing frame 23. The central axis passes through the adjustment half frame 21 and is movably connected to the shaft body 2. The stabilizing cross plate 27 is connected to the adjustment half frame 21 and the threaded rod 26 through a thread, so that the adjustment half frame 21 can remain stable during the lifting process without shaking or offset, thereby improving the accuracy and quality of the bending operation, and the two grooves can accommodate the size The movable platform 31 and the shaft 2 above it are moved to increase the distance between the moved shaft 2 and the fixed shaft 2. The shaft 2 can be divided and adjusted to adjust the size of the groove on the outside of the shaft 2, thereby improving the adaptability of the equipment to steel pipes of different diameters, so that the groove on the outside of the shaft 2 can accommodate larger steel pipes for bending operations.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A five-axis pipe bending machine with a size adjustment function, comprising a workbench (1), an axis body (2), a movable frame base (3) and a fixed frame base (4), wherein the workbench (1) is provided with five axis bodies (2), wherein two fixed axis bodies (2) and three movable axis bodies (2) are provided below the two fixed axis bodies (2), and the movable frame base (3) is provided below the three movable axis bodies (2), characterized in that: The upper part of the shaft body (2) is provided with a liftable adjustment half frame (21), the top of the adjustment half frame (21) is provided with a rotating column (22), the rotating column (22) is movably mounted in the adjustment half frame (21), the bottom end of the rotating column (22) is fixedly connected to a stabilizing frame (23), and the stabilizing frame (23) is movably mounted in the adjustment half frame (21), the bottom end of the stabilizing frame (23) is fixedly connected to a central axis, the central axis penetrates the adjustment half frame (21) and is inserted into the center of the shaft body (2), and the central axis is movably connected to the shaft body (2), and the central axis is fixedly connected to the shaft body (2). A central gear (24) is fixedly connected to the outer side, and side gears (25) are provided on both sides of the central gear (24). The side gears (25) are meshed with the central gear (24), and the two side gears (25) are penetrated by threaded rods (26). A positive thread is provided on the outer side of one of the threaded rods (26), and the threaded rod (26) is threadedly connected to the adjustment half frame (21) through the positive thread. At the same time, a reverse thread is provided on the outer side of the other threaded rod (26), and the threaded rod (26) is threadedly connected to the adjustment half frame (21) through the reverse thread.

2. The five-axis pipe bending machine with size adjustment function according to claim 1, characterized in that: A telescopic inner rod (28) is provided at the top of the side gear (25). The telescopic inner rod (28) is movably inserted in the side gear (25), and the top end of the telescopic inner rod (28) is fixedly mounted in the adjustment half frame (21) through an end head, while the bottom end of the threaded rod (26) is fixedly mounted on the shaft body (2) through an end head.

3. The five-axis pipe bending machine with size adjustment function according to claim 1, characterized in that: A moving platform (31) is provided above the moving frame base (3), a driving motor (32) is fixedly installed in the moving platform (31), a limiting chuck (33) is provided above the driving motor (32), the shaft (2) is located above the limiting chuck (33), the driving motor (32) drives the shaft (2) to rotate, the moving platform (31) is penetrated by a stepping screw (35), the moving platform (31) and the stepping screw (35) are threadedly connected, and the stepping screw (35) is provided with a stopper. One end is connected to the stepping motor (34), and the other end of the stepping screw is movably mounted on the mobile frame base (3). Auxiliary rods (36) are provided on both sides of the stepping screw (35). The mobile platform (31) is also penetrated by the two auxiliary rods (36). The mobile platform (31) and the auxiliary rods (36) are slidably connected, and the two auxiliary rods (36) are parallel to the stepping screw (35). Both ends of the auxiliary rods (36) are fixedly mounted on the mobile frame base (3).

4. The five-axis pipe bending machine with size adjustment function according to claim 1, characterized in that: A stabilizing transverse plate (27) is provided inside the adjusting half frame (21), and the outer side of the stabilizing transverse plate (27) is fixedly connected to the adjusting half frame (21). The stabilizing transverse plate (27) is similar to the adjusting half frame (21) in that it is connected to the two threaded rods (26) in a forward threaded connection and a reverse threaded connection respectively.

5. The five-axis pipe bending machine with size adjustment function according to claim 3, characterized in that: A clamping plate is provided at the bottom end of the limit clamping disc (33), and the clamping plate is clamped into a clamping slot provided on the workbench (1), and the clamping plate slides along the clamping slot when moving.

6. The five-axis pipe bending machine with size adjustment function according to claim 1, characterized in that: The outer surface of the central axis at the bottom end of the stabilizing frame (23) is provided with a scale, and the portion of the central axis engraved with the scale is movably inserted in the shaft body (2).

7. A method for implementing a five-axis pipe bender with size adjustment function as claimed in any one of claims 1 to 6, comprising the following steps: Step 1: When it is necessary to bend a pipe, place the steel pipe between two fixed shaft bodies (2) and two movable shaft bodies (2), drive the two sets of shaft bodies (2) to rotate inwards through a driving motor (32), and the two sets of shaft bodies (2) clamp the steel pipe to make it move, and finally achieve the effect of bending the pipe under the guidance of the last independent shaft body (2); Step 2: When there is a difference in size between the steel pipe to be bent and the inner groove of the shaft body (2), the rotating column (22) is manually rotated, and the rotating column (22) drives the stabilizing frame (23) to rotate in the adjusting half frame (21); Step 3: At the same time, the rotating column (22) drives the central shaft to rotate, and the central shaft drives the central gear (24) to rotate. Through the meshing connection between the central gear (24) and the side gears (25), the central gear (24) drives the side gears (25) on both sides to rotate. After the side gears (25) rotate, they drive the threaded rods (26) inside them to rotate, one of the threaded rods (26) rotates in the forward direction, and the other threaded rod (26) rotates in the reverse direction. Step 4: The two threaded rods (26) are respectively connected with the adjusting half frame (21) and the stabilizing horizontal plate (27) by forward and reverse threads, so that the two threaded rods (26) synchronously drive the adjusting half frame (21) to rise, so that the groove on the outer side of the shaft body (2) and the groove on the outer side of the adjusting half frame (21) are separated from each other, and a larger steel pipe can be accommodated between the two grooves; Step 5: At the same time, the stepper motor (34) is started to drive the stepper screw (35) to rotate. Through the threaded connection between the mobile platform (31) and the stepper screw (35), the stepper screw (35) drives the mobile platform (31) and the shaft body (2) above it to move, so that the distance between the moved shaft body (2) and the fixed shaft body (2) is increased, so that a larger steel pipe can be accommodated for the pipe bending operation.

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