Steel pipe bending machine

By designing a limiting device in a steel pipe bending machine, including a limiting plate and a telescopic component, the precise positioning of the bending position of the steel pipe before bending is achieved, and the problem of not being able to limit the bending position in the prior art is solved, and the problem of improving the bending position is improved. Work efficiency and convenience of use.

CN222491644UActive Publication Date: 2025-02-18SHENYANG WANJIA AUTO PARTS CO LTD
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Patent Information

Application Number
CN202421774278.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-25
Publication Date
2025-02-18
Estimated Expiration
2034-07-25

AI Technical Summary

Technical Problem

The existing steel pipe bending machines cannot limit the bending position before bending, resulting in inconsistent position of the steel pipe bending each time, requiring subsequent cutting, which is inconvenient to use.

Method used

A steel pipe bending machine is designed, including a bending workbench, a bending structure, a conveying structure and a limiting device. The limiting device includes limiting plates, telescopic components, tooth plates, spur gears, bevel gears and motors. Through the coordinated operation of these components, the limiting plates can be moved horizontally to a designated position, limiting the position of the steel pipe, so as to bend before bending. Limited bending position.

Benefits of technology

The precise positioning of the bent position of the steel pipe before bending is achieved, which is easy to use, avoids subsequent cutting steps, and improves work efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222491644U_ABST
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Abstract

The utility model relates to the technical field of steel pipe bending, in particular to a steel pipe bending machine which comprises a bending workbench. The bending structure is arranged above the bending workbench and used for bending the steel pipe; the conveying structure is arranged at the end, away from the bending structure, of the steel pipe and used for conveying the steel pipe; the limiting device is arranged in the bending workbench; the limiting device comprises a limiting plate which is attached to the end, close to the bending structure, of the steel pipe and used for limiting the position of the steel pipe. By operating the limiting device, the limiting device can drive the limiting plate to move horizontally and stop after the limiting plate moves to a designated position, at the moment, the vertical distance between the limiting plate and the center of the bending wheel is the position where the steel pipe needs to be bent, the position of the steel pipe is limited through the limiting plate, and the position where the steel pipe needs to be bent is limited before bending; the use is convenient.
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Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe bending, in particular to a steel pipe bending machine. Background Art

[0002] Steel pipe refers to a steel material with a hollow cross-section whose length is much larger than its diameter or circumference. Steel pipe is not only used to transport fluids and powdered solids, exchange heat energy, and manufacture mechanical parts and containers, but it is also an economical steel material. In the automotive field, exhaust pipes are mostly made of steel pipes, which requires the use of a steel pipe bending machine to bend the steel pipe to a certain arc.

[0003] However, when the existing steel pipe bending machine is used, the steel pipe is first fixed and a torque force is applied to one end of the steel pipe so that the steel pipe is bent along the bending wheel. However, since the bending position of the steel pipe is inconsistent each time, the steel pipe needs to be cut into a suitable size later. The bending position cannot be limited before bending, which is inconvenient. Utility Model Content

[0004] The utility model aims to solve the inconvenience problem caused by the existing steel pipe bending machine that the bending position cannot be limited before bending.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steel pipe bending machine, comprising:

[0007] Bending table;

[0008] A bending structure, arranged above the bending workbench, for bending the steel pipe;

[0009] A conveying structure, arranged at one end of the steel pipe away from the bending structure, for conveying the steel pipe;

[0010] A limiting device is arranged inside the bending workbench; the limiting device comprises: a limiting plate, which is in contact with one end of the steel pipe close to the bending structure and is used to limit the position of the steel pipe.

[0011] Preferably, the limiting device further comprises:

[0012] A telescopic assembly, one end of which is fixedly connected to a side of the limiting plate away from the steel pipe;

[0013] a tooth plate, fixedly connected to the other end of the telescopic assembly;

[0014] A spur gear, disposed above the tooth plate and meshingly connected with the tooth plate;

[0015] A bevel gear set, consisting of a first bevel gear and a second bevel gear, the edge of the first bevel gear is meshed and connected with the edge of the second bevel gear, and the first bevel gear is coaxially arranged with the spur gear;

[0016] A third motor, wherein the output end of the third motor is fixedly connected to the axis of the second bevel gear, and is used for driving the second bevel gear to rotate.

[0017] Preferably, the telescopic assembly comprises:

[0018] The moving part is composed of a horizontal rod and a vertical rod, one end of the horizontal rod is fixedly connected to the limit plate, and the other end is fixedly connected to the top end of the vertical rod;

[0019] A hollow plate has a groove inside, and is slidably connected to the vertical rod through the groove.

[0020] Preferably, the bending structure comprises:

[0021] A bending wheel, the edge of which is in contact with the surface of the steel pipe;

[0022] A rotating plate is arranged below the bending wheel, and one end of the rotating plate is fixedly connected to the axis of the bending wheel;

[0023] A second motor, an output end of which is fixedly connected to the rotating plate, and is used to drive the rotating plate to rotate;

[0024] A first electric push rod, which is disposed at the other end of the rotating plate and is fixedly connected to the rotating plate;

[0025] A fixing block, one end of which is fixedly connected to the output end of the first electric push rod, and the other end of which is in contact with the surface of the steel pipe.

[0026] Preferably, the bending wheel is located directly above the second motor, and the axis of the bending wheel and the output end of the second motor are on the same vertical line.

[0027] Preferably, the conveying structure comprises:

[0028] A steel pipe fixing piece, one end of which extends into the interior of the steel pipe and is used to fix the steel pipe;

[0029] A first motor, wherein an output end of the first motor is fixedly connected to one end of the steel pipe fixing member;

[0030] A movable plate, rotatably connected to the steel pipe fixing member;

[0031] A second electric push rod, wherein an output end of the second electric push rod is fixedly connected to the moving plate.

[0032] Preferably, a first cylindrical pin is provided at the bottom end of the limiting plate.

[0033] Preferably, it further comprises: a moving device; the moving device is arranged inside the bending workbench and connected to the limiting plate, and is used to move the limiting plate.

[0034] Preferably, the mobile device comprises:

[0035] The rotating member is composed of a first rod and a second rod, one end of the first rod is fixedly connected to one end of the second rod, the other end of the first rod is provided with a first sliding groove, and is slidably connected to the first cylindrical pin through the first sliding groove; the other end of the second rod is provided with a second sliding groove;

[0036] A moving block, a surface of which is provided with a second cylindrical pin, the second cylindrical pin is arranged in the second sliding groove, and is slidably connected with the rotating member through the second sliding groove;

[0037] A support frame, rotatably connected to the rotating member;

[0038] A threaded rod, both sides of the surface of the threaded rod are rotatably connected to the support frame; the threaded rod passes through the corresponding position of the moving block and is threadedly connected to the moving block;

[0039] A fourth motor, wherein an output end of the fourth motor is fixedly connected to one end of the threaded rod, and is used for driving the threaded rod to rotate.

[0040] Preferably, it further comprises: a ruler; the ruler is arranged above the bending workbench, and the zero scale position of the ruler is on the same straight line as the axis position of the bending wheel.

[0041] The beneficial effect proposed by the utility model is that by operating the limit device, the limit device will drive the limit plate to move horizontally, and stop after the limit plate moves to the specified position. At this time, the vertical distance from the limit plate to the center of the bending wheel is the position where the steel pipe needs to be bent, and the limit plate is used to limit the position of the steel pipe, so that the position where the steel pipe needs to be bent can be limited before bending, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of the utility model;

[0043] Figure 2 for Figure 1 Schematic diagram of the cross-section plane at the CC line;

[0044] Figure 3 for Figure 2 The left side plan view of the middle part connection structure;

[0045] Figure 4 for Figure 2 Schematic diagram of the connection structure at A in the middle;

[0046] Figure 5 for Figure 2 Schematic diagram of the connection structure at B in the middle.

[0047] In the figure: 1. bending workbench, 2. steel pipe, 3. bending wheel, 4. fixed block, 5. first electric push rod, 6. steel pipe fixing part, 7. moving plate, 8. first motor, 9. second electric push rod, 10. rotating plate, 11. second motor, 12. limit plate, 13. moving part, 14. hollow plate, 15. gear plate, 16. spur gear, 17. bevel gear set, 18. third motor, 19. rotating part, 20. moving block, 21. support frame, 22. threaded rod, 23. fourth motor, 24. ruler. DETAILED DESCRIPTION

[0048] The utility model is further described below in conjunction with the accompanying drawings: Example

[0049] See also Figure 1-5 In this embodiment: a steel pipe bending machine, characterized in that it includes: a bending workbench 1, a bending structure, a conveying structure and a limiting device.

[0050] In this embodiment, the bending structure is arranged above the bending workbench 1, and is used to bend the steel pipe 2, and the steel pipe 2 is bent by utilizing the operation of the bending structure; the conveying structure is arranged at one end of the steel pipe 2 away from the bending structure, and is used to convey the steel pipe 2.

[0051] In this embodiment, the conveying structure can fix the end of the steel pipe 2 that does not need to be bent, and can push the steel pipe 2 to move horizontally, and can also make the steel pipe 2 rotate, thereby changing the bending direction.

[0052] The limiting device is arranged inside the bending workbench 1; the limiting device includes: a limiting plate 12, which is in contact with one end of the steel pipe 2 close to the bending structure, and is used to limit the position of the steel pipe 2. The position of the limiting plate 12 is moved by the limiting device, thereby changing the bending position of the steel pipe 2.

[0053] like Figure 2 and Figure 4 As shown, the limiting device further includes: a telescopic assembly, a toothed plate 15 , a spur gear 16 , a bevel gear set 17 and a third motor 18 .

[0054] In this embodiment, one end of the telescopic assembly is fixedly connected to a side of the limiting plate 12 away from the steel pipe 2 .

[0055] In this embodiment, the telescopic assembly can be telescoped in the vertical direction without hindering the vertical movement of the limiting plate 12 .

[0056] The tooth plate 15 is fixedly connected to the other end of the telescopic assembly; the spur gear 16 is disposed above the tooth plate 15 and meshedly connected to the tooth plate 15 .

[0057] In this embodiment, when the spur gear 16 rotates, the tooth plate 15 moves horizontally, and the tooth plate 15 drives the telescopic assembly to move horizontally at the same time.

[0058] The bevel gear set 17 consists of a first bevel gear and a second bevel gear. The edge of the first bevel gear is meshed with the edge of the second bevel gear. The first bevel gear is coaxially arranged with the spur gear 16. The output end of the third motor 18 is fixedly connected to the axis of the second bevel gear to drive the second bevel gear to rotate.

[0059] In this embodiment, the model of the third motor 18 is selected according to actual needs and meets the working conditions. When the bevel gear set 17 rotates, it will drive the spur gear 16 to rotate synchronously.

[0060] When it is necessary to limit the bending position of the steel pipe 2, start the third motor 18, and the output end of the third motor 18 drives the bevel gear set 17 to rotate; the bevel gear set 17 also drives the spur gear 16 to rotate; the spur gear 16 causes the tooth plate 15 to move horizontally; the tooth plate 15 drives the limit plate 12 to move through the telescopic assembly; the third motor 18 is stopped after the limit plate 12 moves to the specified position; at this time, the vertical distance from the limit plate 12 to the center of the bending wheel 3 is the position where the steel pipe 2 needs to be bent, so that the position where the steel pipe 2 needs to be bent can be limited before bending, which is convenient for use.

[0061] like Figure 2 As shown, the telescopic assembly includes: a moving part 13 and a hollow plate 14.

[0062] Specifically, the movable member 13 is composed of a horizontal rod and a vertical rod, one end of the horizontal rod is fixedly connected to the limiting plate 12, and the other end is fixedly connected to the top of the vertical rod; a groove is opened inside the hollow plate 14, and is slidably connected to the vertical rod through the groove, so that the movable member 13 can slide vertically along the groove inside the hollow plate 14.

[0063] like Figure 2 As shown, the bending structure includes: a bending wheel 3, a rotating plate 10, a second motor 11, a first electric push rod 5 and a fixing block 4.

[0064] Among them, the edge of the bending wheel 3 fits with the surface of the steel pipe 2, and the steel pipe 2 will bend along the edge of the bending wheel 3; the rotating plate 10 is arranged below the bending wheel 3, and one end of the rotating plate 10 is fixedly connected to the axis of the bending wheel 3, and the rotating plate 10 can support the bending wheel 3; the output end of the second motor 11 is fixedly connected to the rotating plate 10, and is used to drive the rotating plate 10 to rotate.

[0065] In this embodiment, the model of the second motor 11 is selected according to actual needs and meets the working conditions; the output end of the second motor 11 can drive the rotating plate 10 to rotate, and because the axis of the bending wheel 3 and the axis of the output end of the second motor 11 are on the same vertical line, the bending wheel 3 can only rotate on its own.

[0066] The first electric push rod 5 is disposed at the other end of the rotating plate 10 and is fixedly connected to the rotating plate 10 .

[0067] In this embodiment, when the rotating plate 10 rotates, it will drive the first electric push rod 5 to revolve; the model of the first electric push rod 5 is selected according to actual needs and can meet the working conditions.

[0068] One end of the fixed block 4 is fixedly connected to the output end of the first electric push rod 5, and the other end is in contact with the surface of the steel pipe 2. When the first electric push rod 5 rotates, it will drive the fixed block 4 to revolve, thereby applying torque force to the steel pipe 2 to achieve bending of the steel pipe 2.

[0069] The bending wheel 3 is located directly above the second motor 11 , and the axis of the bending wheel 3 and the output end of the second motor 11 are on the same vertical line.

[0070] like Figure 2 As shown, the conveying structure includes: a steel pipe fixing part 6, a first motor 8, a moving plate 7 and a second electric push rod 9.

[0071] Specifically, one end of the steel pipe fixing piece 6 extends into the interior of the steel pipe 2 for fixing the steel pipe 2 .

[0072] In this embodiment, the steel pipe fixing member 6 is a common structure on the market that can fix the steel pipe 2. This structure can be selected arbitrarily as long as it can fix the steel pipe 2. Since it is a prior art, it will not be described in detail here.

[0073] The output end of the first motor 8 is fixedly connected to one end of the steel pipe fixing member 6 .

[0074] In this embodiment, the model of the first motor 8 is selected according to actual needs and meets the working conditions. The output end of the first motor 8 can drive the steel pipe fixing part 6 to rotate, thereby driving the steel pipe 2 to rotate, and realizing bending of the steel pipe 2 at any angle.

[0075] The movable plate 7 is rotatably connected to the steel pipe fixing member 6 ; the output end of the second electric push rod 9 is fixedly connected to the movable plate 7 .

[0076] In this embodiment, the model of the second electric push rod 9 is selected according to actual needs and meets the working conditions; the output end of the second electric push rod 9 can push the movable plate 7 to move horizontally, and the movable plate 7 can support the rotation of the steel pipe fixing part 6 and drive the steel pipe fixing part 6 to move horizontally.

[0077] A first cylindrical pin is disposed at the bottom end of the limiting plate 12 .

[0078] When bending, since the limit device will hinder the bending of the steel pipe 2, the limit device needs to be moved, resulting in a change in the limit position. When bending the remaining steel pipes 2, the limit position needs to be re-determined, which is inconvenient.

[0079] In order to solve the above problems, an implementation method of this embodiment is proposed, the steel pipe bending machine also includes: a moving device; the moving device is arranged inside the bending workbench 1 and connected to the limit plate 12, and is used to move the limit plate 12.

[0080] In this embodiment, Figure 2 and Figure 5 As shown, the moving device includes: a rotating member 19, a moving block 20, a support frame 21, a threaded rod 22 and a fourth motor 23.

[0081] The rotating member 19 is composed of a first rod and a second rod, one end of the first rod is fixedly connected to one end of the second rod, and the other end of the first rod is provided with a first sliding groove, which is slidably connected to the first cylindrical pin through the first sliding groove.

[0082] In this embodiment, when the rotating member 19 rotates, the limiting plate 12 moves vertically by sliding between the first cylindrical pin and the first sliding groove.

[0083] A second slide groove is provided at the other end of the second rod; a second cylindrical pin is provided on the surface of the moving block 20, the second cylindrical pin is arranged in the second slide groove, and is slidably connected to the rotating member 19 through the second slide groove; the support frame 21 is rotatably connected to the rotating member 19.

[0084] In this embodiment, when the moving block 20 moves horizontally, the sliding between the second cylindrical pin and the second sliding groove causes the rotating member 19 to rotate along the connection with the supporting frame 21 .

[0085] Both sides of the surface of the threaded rod 22 are rotatably connected to the support frame 21 ; the threaded rod 22 passes through the corresponding position of the moving block 20 and is threadedly connected to the moving block 20 .

[0086] In this embodiment, the support frame 21 can support the rotation of the threaded rod 22; when the threaded rod 22 rotates, the moving block 20 will move horizontally.

[0087] The output end of the fourth motor 23 is fixedly connected to one end of the threaded rod 22 for driving the threaded rod 22 to rotate.

[0088] In this embodiment, the model of the fourth motor 23 is selected according to actual needs and only needs to meet the working conditions.

[0089] Before bending, the fourth motor 23 is started, and the output end of the fourth motor 23 drives the threaded rod 22 to rotate; the threaded rod 22 causes the moving block 20 to move horizontally; the moving block 20 slides between the second cylindrical pin and the second slide groove, so that the rotating member 19 rotates along the connection with the support frame 21; the rotating member 19 slides between the first cylindrical pin and the first slide groove, so that the limit plate 12 moves vertically downward; thereby, the limit plate 12 is moved downward, so that when bending, the limit plate 12 will not cause obstruction to the steel pipe 2; at the same time, there is no need to redefine the limit position, which is more convenient.

[0090] like Figure 2 As shown, the steel pipe bending machine also includes: a ruler 24; the ruler 24 is arranged above the bending workbench 1, and the zero scale position of the ruler 24 is on the same straight line as the axial position of the bending wheel 3, and scale lines are opened on the ruler 24. The bending length is determined by observing the position of the limit plate 12.

[0091] Working principle:

[0092] When the steel pipe bending machine is in use, the user first moves the steel pipe 2 onto the bending workbench 1 and fixes the steel pipe 2 using the steel pipe fixing member 6 .

[0093] Then the third motor 18 is started, and the output end of the third motor 18 drives the bevel gear set 17 to rotate; the bevel gear set 17 also drives the spur gear 16 to rotate; the spur gear 16 causes the tooth plate 15 to move horizontally; the tooth plate 15 drives the limit plate 12 to move through the telescopic assembly; since scale lines are provided on the scale ruler 24, the position of the limit plate 12 corresponding to the scale lines is determined according to the required bending length, so that the position where the steel pipe 2 needs to be bent can be limited before bending, which is convenient for use.

[0094] Afterwards, the second electric push rod 9 is adjusted so that the output end of the second electric push rod 9 contracts; and the steel pipe 2 is driven to move horizontally through the movable plate 7 and the steel pipe fixing member 6; and the steel pipe 2 stops after one end of the steel pipe 2 is attached to the limit plate 12.

[0095] At this time, the fourth motor 23 is started, and the output end of the fourth motor 23 drives the threaded rod 22 to rotate; the threaded rod 22 causes the moving block 20 to move horizontally; the moving block 20 slides between the second cylindrical pin and the second slide groove, so that the rotating member 19 rotates along the connection with the support frame 21; the rotating member 19 slides between the first cylindrical pin and the first slide groove, so that the limit plate 12 moves vertically downward; thereby, the limit plate 12 is moved downward, so that when bending, the limit plate 12 will not cause obstruction to the steel pipe 2; at the same time, there is no need to redefine the limit position, which is more convenient.

[0096] At the same time, the first electric push rod 5 is adjusted, and the output end of the first electric push rod 5 pushes the fixed block 4 to move; the fixed block 4 stops after contacting the steel pipe 2, and then the second motor 11 is started, and the output end of the second motor 11 drives the rotating plate 10 to rotate, and the rotating plate 10 simultaneously drives the first electric push rod 5 and the fixed block 4 to revolve, and the fixed block 4 will apply a torque force to the steel pipe 2, so that the steel pipe 2 bends along the edge of the bending wheel 3, thereby realizing the bending of the steel pipe 2 and completing the use of this device.

[0097] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A steel pipe bending machine, characterized in that: include: Bending table (1); A bending structure, arranged above the bending workbench (1), and used for bending the steel pipe (2); A conveying structure, arranged at an end of the steel pipe (2) away from the bending structure, and used for conveying the steel pipe (2); A limiting device is arranged inside the bending workbench (1); the limiting device comprises: a limiting plate (12) which fits with one end of the steel pipe (2) close to the bending structure and is used to limit the position of the steel pipe (2).

2. The steel pipe bending machine according to claim 1, characterized in that: The limiting device also includes: A telescopic component, one end of which is fixedly connected to a side of the limit plate (12) away from the steel pipe (2); A tooth plate (15) fixedly connected to the other end of the telescopic assembly; A spur gear (16) is disposed above the tooth plate (15) and is meshingly connected to the tooth plate (15); A bevel gear set (17) consisting of a first bevel gear and a second bevel gear, the edge of the first bevel gear being meshed and connected with the edge of the second bevel gear, and the first bevel gear being coaxially arranged with the spur gear (16); A third motor (18), wherein an output end of the third motor (18) is fixedly connected to the axis of the second bevel gear, and is used to drive the second bevel gear to rotate.

3. The steel pipe bending machine according to claim 2, characterized in that: The telescopic assembly comprises: A movable member (13) is composed of a horizontal rod and a vertical rod, one end of the horizontal rod is fixedly connected to the limiting plate (12), and the other end is fixedly connected to the top end of the vertical rod; A hollow plate (14) is provided with a groove inside the hollow plate (14), and is slidably connected to the vertical rod via the groove.

4. The steel pipe bending machine according to claim 1, characterized in that: The bending structure comprises: A bending wheel (3), the edge of the bending wheel (3) being in contact with the surface of the steel pipe (2); A rotating plate (10) is arranged below the bending wheel (3), and one end of the rotating plate (10) is fixedly connected to the axis of the bending wheel (3); a second motor (11), the output end of the second motor (11) being fixedly connected to the rotating plate (10) and used for driving the rotating plate (10) to rotate; a first electric push rod (5), the first electric push rod (5) being arranged at the other end of the rotating plate (10) and being fixedly connected to the rotating plate (10); A fixing block (4), one end of the fixing block (4) being fixedly connected to the output end of the first electric push rod (5), and the other end of the fixing block (4) being in contact with the surface of the steel pipe (2).

5. The steel pipe bending machine according to claim 4, characterized in that: The bending wheel (3) is located directly above the second motor (11), and the axis of the bending wheel (3) and the output end of the second motor (11) are located on the same vertical line.

6. The steel pipe bending machine according to claim 1, characterized in that: The conveying structure comprises: a steel pipe fixing member (6), one end of which extends into the interior of the steel pipe (2) and is used to fix the steel pipe (2); a first motor (8), wherein an output end of the first motor (8) is fixedly connected to one end of the steel pipe fixing member (6); A movable plate (7) rotatably connected to the steel pipe fixing member (6); A second electric push rod (9), wherein an output end of the second electric push rod (9) is fixedly connected to the movable plate (7).

7. The steel pipe bending machine according to claim 1, characterized in that: A first cylindrical pin is arranged at the bottom end of the limiting plate (12).

8. The steel pipe bending machine according to claim 7, characterized in that: Also includes: Moving device; the moving device is arranged inside the bending workbench (1) and connected to the limiting plate (12), and is used to move the limiting plate (12).

9. The steel pipe bending machine according to claim 8, characterized in that: The mobile device comprises: The rotating member (19) is composed of a first rod and a second rod, one end of the first rod is fixedly connected to one end of the second rod, the other end of the first rod is provided with a first sliding groove, and is slidably connected to the first cylindrical pin through the first sliding groove; the other end of the second rod is provided with a second sliding groove; A moving block (20), wherein a second cylindrical pin is disposed on a surface of the moving block (20), the second cylindrical pin is disposed in the second sliding groove, and is slidably connected to the rotating member (19) via the second sliding groove; A support frame (21) rotatably connected to the rotating member (19); a threaded rod (22), wherein both sides of the surface of the threaded rod (22) are rotatably connected to the support frame (21); the threaded rod (22) passes through a corresponding position of the moving block (20) and is threadedly connected to the moving block (20); A fourth motor (23), wherein an output end of the fourth motor (23) is fixedly connected to one end of the threaded rod (22) and is used to drive the threaded rod (22) to rotate.

10. The steel pipe bending machine according to claim 4, characterized in that: Also includes: A scale (24); the scale (24) is arranged above the bending workbench (1), and the zero scale position of the scale (24) is on the same straight line as the axis position of the bending wheel (3).