A steel pipe bending device and method

Abstract

The application discloses a kind of steel pipe bending device and method, device includes fixed frame, two rotating rollers, rotating drive mechanism, stand, lifting seat, fixed roller, lifting drive mechanism and two position detection mechanisms;Two rotating rollers are rotationally arranged on fixed frame;Rotating drive mechanism is used to drive two rotating rollers synchronous rotation;Lifting seat is vertically slidably arranged on stand;Fixed roller is fixed on lifting seat;Lifting drive mechanism is used to drive lifting seat to move up and down;Two position detection mechanisms include height adjusting piece, pressure detection piece, elastic member, mounting block and detection wheel.The beneficial effects of the present application are: the present application determines whether detection wheel and steel pipe are in contact by the indication of pressure detection piece, when detection wheel and steel pipe are separated, it indicates that one end of steel pipe has approached a rotating roller, at this time, the rotating roller is automatically controlled to reverse, greatly improving the degree of use convenience, and safety hazards caused by worker forgetting to reverse can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe production, in particular to a steel pipe bending device and method. BACKGROUND

[0002] In mechanical manufacturing, especially in the manufacturing of steel pipes, it is very common to bend the steel pipes (such as the Chinese utility model patent with the application number CN201420434703.0).

[0003] A common steel pipe bending device includes a fixed frame, two rotating rollers, a rotating driving mechanism, a vertical column, a lifting seat, a fixed roller, a lifting driving mechanism, and two position detection mechanisms. The two rotating rollers are both rotationally arranged on the fixed frame and are arranged in parallel along the horizontal direction. The rotating driving mechanism is connected with the two rotating rollers and is used to drive the two rotating rollers to rotate synchronously. The vertical column is vertically fixed on the fixed frame. The lifting seat is vertically and slidingly arranged on the vertical column. The fixed roller is fixed on the lifting seat and is located above the middle of the two rotating rollers and is coplanar with the two rotating rollers. The lifting driving mechanism is connected with the lifting seat and is used to drive the lifting seat to move up and down. In use, the steel pipe to be bent is inserted between the rotating rollers and the fixed roller along the horizontal direction, and then the lifting driving mechanism is driven to move the lifting seat downward, so that the fixed roller moves downward. At the same time, the rotating driving mechanism is driven to drive the two rotating rollers to rotate synchronously, so that the steel pipe moves along the direction of the two rotating rollers. In the moving process, the steel pipe is gradually bent under the pressure of the fixed roller. When one end of the steel pipe moves close to one rotating roller, the worker clicks the reversing button on the rotating driving mechanism at this time, and the rotating driving mechanism drives the two rotating rollers to rotate reversely synchronously, so that the steel pipe moves reversely. This is repeated several times until the bending degree of the steel pipe meets the requirements.

[0004] It can be seen that the existing steel pipe bending device requires workers to pay attention to the state of the steel pipe at all times. When one end of the steel pipe rotates close to one rotating roller, the worker needs to click the reversing button on the rotating driving mechanism, which is tedious and requires high attention from the worker. If the worker forgets to click the reversing button, the steel pipe will fall and may injure the worker. Therefore, the existing steel pipe bending device still has certain safety hazards. SUMMARY

[0005] Therefore, it is necessary to provide a steel pipe bending device and method to solve the technical problems of the tedious operation and certain safety hazards of the existing steel pipe bending device.

[0006] In order to achieve the above object, the present application provides a steel pipe bending device, comprising a fixing frame, two rotating rollers, a rotating driving mechanism, a stand, a lifting seat, a fixed roller, a lifting driving mechanism and two position detection mechanisms.

[0007] Both of the rotating rollers are rotationally arranged on the fixing frame and are arranged in parallel along the horizontal direction.

[0008] The rotating driving mechanism is connected with the two rotating rollers and is used for driving the two rotating rollers to rotate synchronously.

[0009] The stand is vertically fixed on the fixing frame.

[0010] The lifting seat is vertically and slidingly arranged on the stand.

[0011] The fixed roller is fixed on the lifting seat, is located above the middle of the two rotating rollers and is coplanar with the two rotating rollers.

[0012] The lifting driving mechanism is connected with the lifting seat and is used for driving the lifting seat to move up and down.

[0013] Both of the position detection mechanisms comprise a height adjusting piece, a pressure detecting piece, an elastic piece, a mounting block and a detection wheel, the fixed end of the height adjusting piece is fixed on the stand, the movable end of the height adjusting piece is connected with one end of the pressure detecting piece and is used for driving the pressure detecting piece to move up and down, the other end of the pressure detecting piece is fixedly connected with one end of the elastic piece, the other end of the elastic piece is fixedly connected with one end of the mounting block, the other end of the mounting block is rotationally arranged with the detection wheel, the detection wheel is coplanar with the corresponding rotating roller and is arranged on the outer side of the corresponding rotating roller.

[0014] In some embodiments, the steel pipe bending device further comprises a top plate, the top plate is fixedly connected with the stand, and the fixed end of the height adjusting piece is fixed on the top plate.

[0015] In some embodiments, the position detection mechanism further comprises a connecting plate, one end of the connecting plate is fixedly connected with the top plate, and the other end of the connecting plate is fixedly connected with the fixed end of the height adjusting piece.

[0016] In some embodiments, coaxial shafts are fixedly arranged on the centers of the two rotating rollers, and the coaxial shafts are rotationally arranged on the fixing frame.

[0017] In some embodiments, the rotating driving mechanism comprises two transmission sprockets, a transmission chain, a driving sprocket and a rotating driving member, the two transmission sprockets are fixedly sleeved on the two rotating shafts respectively, the transmission chain is closed, and the two ends of the transmission chain are engaged with the two transmission sprockets respectively, the driving sprocket is fixed on one of the rotating shafts, and the rotating driving member is connected with the driving sprocket and used for driving the driving sprocket to rotate.

[0018] In some embodiments, the rotating driving member comprises a driving motor, an output sprocket and a driving chain, the output sprocket is fixedly sleeved on the output shaft of the driving motor, the driving chain is closed, and the two ends of the driving chain are engaged with the output sprocket and the driving sprocket respectively.

[0019] In some embodiments, the lifting seat is provided with a threaded hole and a through hole extending in the vertical direction, the lifting seat is slidingly sleeved on the stand column through the through hole, the lifting driving mechanism comprises a lead screw and a lifting driving member, the lead screw is rotationally arranged on the fixed frame in the vertical direction and is threadedly connected with the threaded hole, and the lifting driving member is connected with the lead screw and used for driving the lead screw to rotate.

[0020] In some embodiments, the lifting driving member comprises a lifting driving motor and a shaft coupling, one end of the shaft coupling is fixedly connected with the output shaft of the lifting driving motor, and the other end of the shaft coupling is fixedly connected with one end of the lead screw.

[0021] In some embodiments, the steel pipe bending device further comprises a base, and the fixed frame is fixed on the base.

[0022] The application further provides a steel pipe bending method, which is suitable for the steel pipe bending device and comprises the following steps:

[0023] S1, inserting the steel pipe to be bent along the horizontal direction between the rotating roller and the fixed roller, so that the upper end surface of the steel pipe abuts against the fixed roller and the two detection wheels, and the lower end surface of the steel pipe abuts against the two rotating rollers, at this time, the elastic member is in the compressed state, and the pressure detection member detects the positive pressure;

[0024] S2, driving the lifting seat to move downward by the lifting driving mechanism, so that the fixed roller moves downward, and at the same time, the two rotating rollers are synchronously driven to rotate by the rotating driving mechanism, so that the steel pipe moves along the direction of the two rotating rollers, and in the moving process, the steel pipe is gradually bent under the pressure of the fixed roller;

[0025] S3, when one end of the steel pipe moves away from the detection wheel, the detection wheel moves down under the reset force of the elastic member, at this time, the pressure detection member detects the tension, when the pressure detection member detects the tension, the rotating driving mechanism drives the two rotating rollers to rotate reversely synchronously, so that the steel pipe moves reversely, at the same time, the height adjusting member drives the detection wheel to move up to the preset height, after the preset time, the height adjusting member drives the detection wheel to move down, when the pressure detection member detects the positive pressure, it indicates that the detection wheel abuts against the steel pipe, at this time, the height adjusting member stops driving the detection wheel to move up and down;

[0026] S4, repeating steps S2 and S3 until the bending degree of the steel pipe meets the requirements;

[0027] S5, during the whole process of steps S1-S4, when the positive pressure detected by the pressure detection member is greater than the preset positive pressure, the height adjusting member drives the detection wheel to move up until the positive pressure detected by the pressure detection member is not greater than the preset positive pressure.

[0028] Compared with the prior art, the beneficial effects of the technical scheme provided by the present application are: the present application determines whether the detection wheel abuts against the steel pipe through the indication of the pressure detection member, when the detection wheel separates from the steel pipe, it indicates that one end of the steel pipe has approached one rotating roller, at this time, the rotating roller is automatically controlled to reverse, without manual operation, which greatly improves the use convenience, and avoids the safety hidden danger caused by the worker forgetting to reverse. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a three-dimensional structure schematic diagram of an embodiment of the steel pipe bending device provided by the present application;

[0030] Figure 2 is Figure 1 is a three-dimensional structure schematic diagram of the steel pipe bending device in

[0031] Figure 3 is Figure 1 is a three-dimensional structure schematic diagram of a position detection mechanism in

[0032] Figure 4 is a process schematic diagram of step S1 of the steel pipe bending method;

[0033] Figure 5 is a process schematic diagram of step S2 of the steel pipe bending method;

[0034] Figure 6 is a process schematic diagram of step S3 of the steel pipe bending method;

[0035] In the figure: 1 - fixed frame, 2 - rotating roller, 21 - rotating shaft, 3 - rotating drive mechanism, 31 - transmission sprocket, 32 - transmission chain, 33 - drive sprocket, 34 - rotating drive part, 341 - drive motor, 342 - output sprocket, 343 - drive chain, 4 - stand column, 41 - top plate, 5 - lifting seat, 6 - fixed roller, 7 - lifting drive mechanism, 71 - screw rod, 72 - lifting drive part, 721 - lifting drive motor, 722 - coupling, 8 - position detection mechanism, 81 - height adjusting part, 82 - pressure detection part, 83 - elastic part, 84 - mounting block, 85 - detection wheel, 86 - connecting plate, 9 - steel pipe, 100 - base. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in detail hereinafter with reference to the drawings, in which the figures constitute a part of the present application and are used to explain the principles of the embodiments of the present application, but are not used to limit the scope of the present application.

[0037] Please refer to Figures 1-3 The present application provides a steel pipe bending device and method, which comprises a fixed frame 1, two rotating rollers 2, a rotating drive mechanism 3, a stand column 4, a lifting seat 5, a fixed roller 6, a lifting drive mechanism 7 and two position detection mechanisms 8.

[0038] The two rotating rollers 2 are both rotationally arranged on the fixed frame 1 and are arranged in parallel along the horizontal direction. The rotating drive mechanism 3 is connected with the two rotating rollers 2 and is used to drive the two rotating rollers 2 to rotate synchronously.

[0039] The stand column 4 is vertically fixed on the fixed frame 1. The lifting seat 5 is vertically and slidingly arranged on the stand column 4. The fixed roller 6 is fixed on the lifting seat 5, is located above the middle of the two rotating rollers 2 and is coplanar with the two rotating rollers 2. The lifting drive mechanism 7 is connected with the lifting seat 5 and is used to drive the lifting seat 5 to move up and down.

[0040] The two position detection mechanisms 8 both comprise a height adjusting part 81, a pressure detection part 82, an elastic part 83, a mounting block 84 and a detection wheel 85. The fixed end of the height adjusting part 81 is fixed on the stand column 4. The movable end of the height adjusting part 81 is connected with one end of the pressure detection part 82 and is used to drive the pressure detection part 82 to move up and down. The other end of the pressure detection part 82 is fixedly connected with one end of the elastic part 83. In this embodiment, the pressure detection part 82 is a ceramic tablet. The other end of the elastic part 83 is fixedly connected with the other end of the mounting block 84. The mounting block 84 is rotationally arranged with the detection wheel 85 on the other end. The detection wheel 85 is coplanar with the corresponding rotating roller 2 and is arranged on the outer side of the corresponding rotating roller 2.

[0041] In use, the steel pipe 9 to be bent is inserted between the rotating roller 2 and the fixed roller 6 in a horizontal direction, so that the upper end surface of the steel pipe 9 abuts against the fixed roller 6 and the two detection wheels 85, and the lower end surface of the steel pipe 9 abuts against the two rotating rollers 2 (as shown in Figure 4 ), at this time, the elastic member 83 is in a compressed state, and the pressure detection member 82 detects a positive pressure; then the lifting seat 5 is driven to move downward by the lifting driving mechanism 7, so that the fixed roller 6 moves downward, and at the same time, the two rotating rollers 2 are driven to rotate synchronously by the rotating driving mechanism 3, so that the steel pipe 9 moves along the direction of the two rotating rollers 2, and in the moving process, the steel pipe 9 is gradually bent by the pressure of the fixed roller 6 (as shown in Figure 5 ); when one end of the steel pipe 9 moves away from one detection wheel 85 (as shown in Figure 6 ), the detection wheel 85 moves downward under the action of the restoring force of the elastic member 83, at this time, the pressure detection member 82 detects a tension, when the pressure detection member 82 detects the tension, the two rotating rollers 2 are driven to rotate reversely synchronously by the rotating driving mechanism 3, so that the steel pipe 9 moves reversely, and at the same time, the detection wheel 85 is driven to rise to a preset height (in this embodiment, the maximum height that the detection wheel 85 can reach) by the height adjusting member 81, after a preset time, the detection wheel 85 is driven to move downward by the height adjusting member 81, when the pressure detection member 82 detects a positive pressure, it indicates that the detection wheel 85 abuts against the steel pipe 9, at this time, the height adjusting member 81 stops driving the detection wheel 85 to rise and fall; the above steps are repeated until the bending degree of the steel pipe meets the requirements. The present application determines whether the detection wheel 85 abuts against the steel pipe 9 by the indication of the pressure detection member 82, when the detection wheel 85 separates from the steel pipe 9, it indicates that one end of the steel pipe 9 has approached one rotating roller 2, at this time, the rotating roller 2 is automatically controlled to reverse, without manual operation, which greatly improves the convenience of use, and can avoid the safety hazard caused by the worker forgetting to reverse.

[0042] In addition, in order to prevent the steel pipe 9 from being deformed when the pressure between the detection wheel 85 and the steel pipe 9 is too large, during the entire production process, when the positive pressure detected by the pressure detection member 82 is greater than a preset positive pressure, the detection wheel 85 is driven to move upward by the height adjusting member 81 until the positive pressure detected by the pressure detection member 82 is not greater than the preset positive pressure, so that the pressure between the detection wheel 85 and the steel pipe 9 is kept within an allowable range, and the pressure between them will not cause the steel pipe 9 to be deformed.

[0043] In order to improve the stability of the stand 4, please refer to Figure 1 and Figure 2 In a preferred embodiment, the steel pipe bending device further comprises a top plate 41, the top plate 41 is fixedly connected with the stand 4, and the fixed end of the height adjusting member 81 is fixed to the top plate 41, in this embodiment, the height adjusting member 81 is a telescopic pneumatic cylinder.

[0044] In order to realize the connection between the height adjusting member 81 and the top plate 41, please refer to Figure 1 and Figure 2 In a preferred embodiment, the position detecting mechanism 8 further comprises a connecting plate 86, one end of which is fixedly connected with the top plate 41, and the other end of which is fixedly connected with the fixed end of the height adjusting member 81.

[0045] In order to realize the installation of the rotating roller 2, please refer to Figure 1 and Figure 2 In a preferred embodiment, the rotating shaft 21 is coaxially fixed on the center of each of the two rotating rollers 2, and is rotatably arranged on the fixed frame 1.

[0046] In order to realize the function of the rotating driving mechanism 3, please refer to Figure 1 and Figure 2 In a preferred embodiment, the rotating driving mechanism 3 comprises two transmission sprockets 31, a transmission chain 32, a driving sprocket 33 and a rotating driving member 34, the two transmission sprockets 31 are respectively fixedly sleeved on the two rotating shafts 21, the transmission chain 32 is closed arranged, the two ends of the transmission chain 32 are respectively engaged with the two transmission sprockets 31, the driving sprocket 33 is fixed on one of the rotating shafts 21, and the rotating driving member 34 is connected with the driving sprocket 33 and is used to drive the driving sprocket 33 to rotate, thereby driving the two rotating shafts 21 and the two rotating rollers 2 to synchronously rotate.

[0047] In order to realize the function of the rotating driving member 34, please refer to Figure 1 and Figure 2 In a preferred embodiment, the rotating driving member 34 comprises a driving motor 341, an output sprocket 342 and a driving chain 343, the output sprocket 342 is fixedly sleeved on the output shaft of the driving motor 341, the driving chain 343 is closed arranged, and the two ends of the driving chain 343 are respectively engaged with the output sprocket 342 and the driving sprocket 33, so as to drive the output sprocket 342 to rotate through the driving motor 341, thereby driving the driving sprocket 33 to rotate, and further driving the two rotating shafts 21 and the two rotating rollers 2 to synchronously rotate.

[0048] In order to realize the function of the lifting driving mechanism 7, please refer to Figure 1 and Figure 2In a preferred embodiment, the lifting seat 5 is provided with a screw hole and a through hole extending in the vertical direction, the lifting seat 5 is sleeved on the column 4 through the through hole; the lifting driving mechanism 7 comprises a screw rod 71 and a lifting driving member 72, the screw rod 71 is arranged on the fixed frame 1 in the vertical direction and is threadedly connected with the screw hole, the lifting driving member 72 is connected with the screw rod 71 and is used for driving the screw rod 71 to rotate, the screw rod 71 acts on the lifting seat 5, and the lifting seat 5 is limited by the column 4 and cannot rotate, therefore, the rotation of the screw rod 71 can be converted into the up-down movement of the lifting seat 5.

[0049] In order to realize the function of the lifting driving member 72, please refer to Figure 1 and Figure 2 In a preferred embodiment, the lifting driving member 72 comprises a lifting driving motor 721 and a shaft coupling 722, one end of the shaft coupling 722 is fixedly connected with the output shaft of the lifting driving motor 721, and the other end of the shaft coupling 722 is fixedly connected with one end of the screw rod 71.

[0050] In order to facilitate the installation of the whole device, please refer to Figure 1 In a preferred embodiment, the steel pipe bending device further comprises a base 100, and the fixed frame 1 is fixed on the base 100.

[0051] The application further provides a steel pipe bending method, which is suitable for the steel pipe bending device and comprises the following steps.

[0052] S1, as Figure 4 The steel pipe 9 to be bent is inserted between the rotating roller 2 and the fixed roller 6 in the horizontal direction, the upper end surface of the steel pipe 9 abuts against the fixed roller 6 and the two detection wheels 85, the lower end surface of the steel pipe 9 abuts against the two rotating rollers 2, at this time, the elastic member 83 is in the compressed state, and the pressure detection member 82 detects the positive pressure.

[0053] S2, as Figure 5 The lifting seat 5 is driven downward by the lifting driving mechanism 7, so that the fixed roller 6 moves downward, at the same time, the two rotating rollers 2 are driven to rotate synchronously by the rotating driving mechanism 3, so that the steel pipe 9 moves along the direction of the two rotating rollers 2, in the movement process, the steel pipe 9 is gradually bent under the pressure of the fixed roller 6.

[0054] S3, as Figure 6When one end of the steel pipe 9 moves away from the detection wheel 85, the detection wheel 85 moves downward under the restoring force of the elastic member 83, at this time, the tension detection member 82 detects the tension, when the tension detection member 82 detects the tension, the rotary driving mechanism 3 drives the two rotary rollers 2 to synchronously and reversely rotate, so as to reversely move the steel pipe 9, at the same time, the height adjusting member 81 drives the detection wheel 85 to move upward to the preset height, after the preset time, the height adjusting member 81 drives the detection wheel 85 to move downward, when the tension detection member 82 detects the positive pressure, it indicates that the detection wheel 85 abuts against the steel pipe 9, at this time, the height adjusting member 81 stops driving the detection wheel 85 to move upward and downward;

[0055] S4, repeating steps S2 and S3 until the bending degree of the steel pipe 9 meets the requirement;

[0056] S5, during the whole process of steps S1-S4, when the positive pressure detected by the tension detection member 82 is greater than the preset positive pressure, the height adjusting member 81 drives the detection wheel 85 to move upward until the positive pressure detected by the tension detection member 82 is not greater than the preset positive pressure, so as to keep the pressure between the detection wheel 85 and the steel pipe 9 within the allowable range, and the pressure between the two will not cause the steel pipe 9 to be deformed.

[0057] In summary, the present application determines whether the detection wheel 85 abuts against the steel pipe 9 by the indication of the tension detection member 82, when the detection wheel 85 is separated from the steel pipe 9, it indicates that one end of the steel pipe 9 has approached one rotary roller 2, at this time, the rotary roller 2 is automatically controlled to reversely rotate, without manual operation, which greatly improves the use convenience, and avoids the safety hidden danger caused by the worker forgetting to reverse.

[0058] The above only describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A steel pipe bending method, characterized in that: A steel pipe bending device is used, which includes a fixed frame, two rotating rollers, a rotating drive mechanism, a column, a lifting seat, a fixed roller, a lifting drive mechanism and two position detection mechanisms; The two rotating rollers are both rotatably mounted on the fixed frame and arranged in parallel along the horizontal direction; The rotation drive mechanism is connected to the two rotating rollers and is used to drive the two rotating rollers to rotate synchronously; The upright post is vertically fixed on the fixing frame; The lifting seat is vertically slidably arranged on the column; The fixed roller is fixed on the lifting seat, located above the middle of the two rotating rollers, and coplanar with the two rotating rollers; The lifting drive mechanism is connected to the lifting seat and is used to drive the lifting seat to move up and down; The two position detection mechanisms each include a height adjustment member, a pressure detection member, an elastic member, a mounting block and a detection wheel, the fixed end of the height adjustment member is fixed to the column, the movable end of the height adjustment member is connected to one end of the pressure detection member and is used to drive the pressure detection member to move up and down, the other end of the pressure detection member is fixedly connected to one end of the elastic member, the other end of the elastic member is fixedly connected to one end of the mounting block, the other end of the mounting block is rotatably provided with the detection wheel, the detection wheel is coplanar with the corresponding rotating roller, and is provided on the outer side of the corresponding rotating roller; The steel pipe bending method comprises the following steps: S1. Insert the steel pipe to be bent horizontally between the rotating roller and the fixed roller, so that the upper end of the steel pipe abuts against the fixed roller and the two detection rollers, and the lower end of the steel pipe abuts against the two rotating rollers. At this time, the elastic member is in a compressed state and the pressure detection member detects positive pressure; S2. The lifting seat is driven downward by the lifting drive mechanism, thereby moving the fixed roller downward. At the same time, the two rotating rollers are driven to rotate synchronously by the rotating drive mechanism, so that the steel pipe moves along the direction of the two rotating rollers. During the movement, the steel pipe is gradually bent by the pressure of the fixed rollers; S3. When one end of the steel pipe moves to be separated from one of the detection wheels, the detection wheel moves downward under the action of the reset force of the elastic member. At this time, the pressure detection member detects the tension. When the pressure detection member detects the tension, the rotation drive mechanism drives the two rotating rollers to rotate synchronously in opposite directions to make the steel pipe move in the opposite direction. At the same time, the height adjustment member drives the detection wheel to rise to a preset height. After a preset time, the height adjustment member drives the detection wheel to move downward. When the pressure detection member detects positive pressure, it indicates that the detection wheel is in contact with the steel pipe. At this time, the height adjustment member stops driving the detection wheel to rise and fall. S4, repeat steps S2 and S3 until the curvature of the steel pipe meets the requirements; S5. During the entire process of steps S1 to S4, when the positive pressure detected by the pressure detection component is greater than the preset positive pressure, the height adjustment component drives the detection wheel to move upward until the positive pressure detected by the pressure detection component is no greater than the preset positive pressure.

2. The steel pipe bending method according to claim 1, characterized in that: It also includes a top plate, which is fixedly connected to the column, and the fixed end of the height adjusting member is fixed to the top plate.

3. The steel pipe bending method according to claim 2, characterized in that: The position detection mechanism further includes a connecting plate, one end of which is fixedly connected to the top plate, and the other end of which is fixedly connected to the fixed end of the height adjustment member.

4. The steel pipe bending method according to claim 1, characterized in that: A rotating shaft is coaxially fixed to the centers of the two rotating rollers, and the rotating shaft is rotatably arranged on the fixing frame.

5. The steel pipe bending method according to claim 4, characterized in that: The rotation drive mechanism includes two transmission sprockets, a transmission chain, a drive sprocket and a rotation drive member. The two transmission sprockets are fixedly mounted on the two rotating shafts respectively. The transmission chain is closed. The two ends of the transmission chain are respectively engaged with the two transmission sprockets. The drive sprocket is fixed on one of the rotating shafts. The rotation drive member is connected to the drive sprocket and is used to drive the drive sprocket to rotate.

6. The steel pipe bending method according to claim 5, characterized in that: The rotating drive component includes a driving motor, an output sprocket and a driving chain. The output sprocket is fixedly sleeved on the output shaft of the driving motor. The driving chain is closed, and the two ends of the driving chain are respectively engaged with the output sprocket and the driving sprocket.

7. The steel pipe bending method according to claim 1, characterized in that: The lifting seat is provided with screw holes and through holes extending in the vertical direction, and the lifting seat is slidably sleeved on the column through the through holes; The lifting drive mechanism includes a screw rod and a lifting drive member. The screw rod is rotatably arranged on the fixing frame along the vertical direction and is threadedly connected to the screw hole. The lifting drive member is connected to the screw rod and is used to drive the screw rod to rotate.

8. The steel pipe bending method according to claim 7, characterized in that: The lifting drive component includes a lifting drive motor and a coupling, one end of the coupling is fixedly connected to the output shaft of the lifting drive motor, and the other end of the coupling is fixedly connected to one end of the screw rod.

9. The steel pipe bending method according to claim 1, characterized in that: It also includes a base, and the fixing frame is fixed on the base.

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