Pipe bending wheel structure of pipe bending machine for pipe processing

By incorporating multi-specification pipe grooves and limiting mechanisms into the pipe bending wheel structure, the problem of frequent component replacement in pipe bending machines is solved, enabling efficient processing and precise bending of multi-specification pipes.

CN224309366UActive Publication Date: 2026-06-02HEBEI SHANGHENG PIPELINE MFG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HEBEI SHANGHENG PIPELINE MFG CO LTD
Filing Date
2025-06-09
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing pipe bending machine's bending wheel design can only adapt to one specific pipe diameter, resulting in frequent replacement of parts, which is time-consuming and labor-intensive, reduces production efficiency, and shortens equipment life.

Method used

A pipe bending wheel structure was designed. By setting several sets of pipe grooves with increasing diameters and an adjustable pressure plate on the wheel module, it can adapt to various pipe diameters. Combined with a limiting mechanism, it prevents the pipe from shaking and improves processing accuracy and consistency.

Benefits of technology

It reduces the frequency of component replacement, reduces wear, improves processing efficiency and precision, and reduces scrap rate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of pipe bender, and the utility model provides a pipe bender wheel structure for pipe machining, including the processing station, the processing station right side outer wall is fixed with the supporting plate, is equipped with the pipe bending mechanism on the supporting plate, the workstation top right side is fixed with the support frame, is equipped with the limiting mechanism on the support frame, the third air cylinder, the processing station bottom left side is fixed with the third air cylinder, the third air cylinder output is fixed with the third telescopic link, the other end of third telescopic link is fixed with the cross bar, the cross bar top end both sides edge position department all are fixed with the roof. Through the above technical scheme, the technical problem that the processing efficiency is low because of frequent replacement and installation corresponding pipe bending wheel when the pipe material of different specifications pipe diameter is processed is solved.
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Description

Technical Field

[0001] This utility model relates to the field of pipe bending machine technology, specifically to a pipe bending wheel structure for pipe processing. Background Technology

[0002] In the field of pipe processing, pipe bending machines are key equipment for bending and shaping pipes. The bending wheel, as a core component of the pipe bending machine, directly affects the quality and processing efficiency of the bend. Currently, most common pipe bending machines on the market use a standardized, fixed-diameter design for their bending wheels, meaning one bending wheel is only suitable for one specific pipe diameter. In actual production, pipe processing often involves various pipe diameters. When processing pipes of different diameters, operators must stop the machine, remove the currently used bending wheel, install a new one suitable for the new diameter, and perform adjustments and calibrations. This entire replacement process is not only time-consuming and labor-intensive but also requires a high level of operator skill. Furthermore, frequent disassembly and installation of the bending wheel easily causes wear and tear on the bending wheel and related components, shortening the equipment's lifespan and increasing maintenance costs. Simultaneously, downtime for component replacement also leads to reduced production efficiency. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a pipe bending wheel structure for a pipe bending machine, which solves the technical problem of low processing efficiency caused by frequent replacement and installation of corresponding bending wheels when processing pipes of different diameters.

[0004] According to one aspect, at least one embodiment of the present invention provides a pipe bending wheel structure for a pipe bending machine, comprising: a processing table, a support plate fixedly installed on the outer right side of the processing table, a pipe bending mechanism mounted on the support plate, and a support frame fixedly installed on the top right side of the processing table, with a limiting mechanism mounted on the support frame;

[0005] The third cylinder is fixedly installed on the left side of the bottom of the processing table. The output end of the third cylinder is fixedly installed with a third telescopic rod. The other end of the third telescopic rod is fixedly installed with a crossbar. Top plates are fixedly installed at the two edges of the top of the crossbar.

[0006] For example, in at least one embodiment of the present invention, a pipe bending wheel structure for a pipe bending machine is provided, which further includes: the pipe bending mechanism includes a pipe bending wheel mechanism and a pipe pressing mechanism; the pipe bending wheel mechanism includes a mounting shaft, a support plate, a wheel module, an I-beam pressing cylinder, an external thread, a nut, and a first pipe groove; the mounting shaft is rotatably mounted on the support plate; the support plate is fixedly mounted on the mounting shaft; the wheel module is movably mounted on the support plate; the I-beam pressing cylinder is slidably mounted on the mounting shaft at a position above the wheel module; the top of the outer wall of the mounting shaft is provided with an external thread; the mounting shaft is threadedly connected to a nut through the external thread; and the wheel module is provided with several sets of first pipe grooves, the diameter of which increases sequentially from top to bottom.

[0007] For example, in at least one embodiment of the present invention, a pipe bending wheel structure for a pipe bending machine is provided, which further includes: the pressing mechanism includes a mounting plate, a connecting plate, a pressing template, a mounting groove, a sliding groove, a threaded rod, an internal hexagonal rotating head, a screw, and a second pipe groove. The mounting plate is fixedly installed on the mounting shaft at a position below the support plate. The mounting plate has a sliding groove. The connecting plate is slidably installed inside the sliding groove. The threaded rod is rotatably installed inside the sliding groove. The rear end of the threaded rod extends to the outside of the mounting plate and is fixedly installed with an internal hexagonal rotating head. The connecting plate is threadedly connected to the threaded rod. The top of the connecting plate has a horizontally opened mounting groove. The pressing template is provided at a position directly above the connecting plate. A sliding strip is fixedly installed at the bottom of the pressing template. The sliding strip is slidably connected to the mounting groove. A screw is vertically threaded through the pressing template. The connecting plate has a mounting hole that matches the screw. The pressing template has a second pipe groove that matches each group of first pipe grooves.

[0008] For example, in a pipe bending wheel structure for a pipe processing machine provided in at least one embodiment of the present invention, a rotating rod is fixedly installed at the rear end of the bottom of the mounting plate, and an anti-slip sleeve is fixedly installed on the rotating rod.

[0009] For example, in a pipe bending wheel structure for a pipe processing machine provided in at least one embodiment of the present invention, the following are also included: an arc-shaped groove is provided on the support plate, a sliding plate is fixedly installed at the bottom end of the mounting plate, the bottom end of the sliding plate is movably connected to the arc-shaped groove, and an angle scale strip is fixedly installed on the outer wall of the support plate.

[0010] For example, in a pipe bending wheel structure for a pipe bending machine provided in at least one embodiment of this utility model, the limiting mechanism further includes: a support frame, a first cylinder, a first telescopic rod, a V-shaped upper limit plate, and a first guide rod. The support frame is fixedly installed on the right side of the top of the processing table, the first cylinder is fixedly installed on the top of the support frame, a V-shaped upper limit plate is provided inside the support frame, the first telescopic rod is fixedly installed at the output end of the first cylinder, the other end of the first telescopic rod is fixedly connected to the V-shaped upper limit plate, and the first guide rods are vertically and slidably installed on both sides of the top of the support frame, with the bottom ends of the two sets of first guide rods fixedly connected to the V-shaped upper limit plate.

[0011] For example, in a pipe bending wheel structure for a pipe bending machine provided in at least one embodiment of this utility model, the limiting mechanism further includes: a second cylinder, a second telescopic rod, a V-shaped lower limiting plate, a second guide rod, a mating groove, and rollers. The second cylinder is fixedly installed at the bottom of the processing table directly below the support frame. A V-shaped lower limiting plate is provided inside the support frame directly below the V-shaped upper limiting plate. The output end of the second cylinder is fixedly installed with the second telescopic rod. The other end of the second telescopic rod is fixedly connected to the V-shaped lower limiting plate. Second guide rods are fixedly installed on both sides of the bottom end of the V-shaped lower limiting plate. Both sets of second guide rods are slidably connected to the processing table. Several sets of mating grooves are provided on both the V-shaped upper limiting plate and the V-shaped lower limiting plate. The V-shaped upper limiting plate and the V-shaped lower limiting plate are intersected by the mating grooves. Several sets of rollers are movably installed at the ends of the V-shaped upper limiting plate and the V-shaped lower limiting plate that are close to each other.

[0012] For example, in a pipe bending wheel structure for a pipe bending machine provided in at least one embodiment of the present invention, rubber pads are fixedly installed at the four corners of the bottom of the processing table.

[0013] The beneficial effects of the embodiments of this utility model are as follows:

[0014] In this invention, the pipe bending mechanism allows the same wheel module to adapt to various pipe diameters, thereby reducing the frequency of downtime for component replacement and minimizing wear caused by frequent component changes. It also improves processing efficiency. Furthermore, the limiting mechanism in this device lifts the pipe to the appropriate height for processing based on its diameter, effectively preventing vertical displacement or swaying during bending. This ensures the pipe is processed according to the preset bending angle and shape, improving bending accuracy and consistency, and reducing scrap rates. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the pipe bending wheel structure of a pipe bending machine in one embodiment of the present invention;

[0017] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of this utility model from below;

[0020] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B.

[0021] In the diagram: 1. Machining table; 2. Support plate; 3. Mounting shaft; 4. Support plate; 5. Wheel module; 6. I-beam pressure cylinder; 7. External thread; 8. Nut; 9. Mounting plate; 10. Connecting plate; 11. Pressing template; 12. Mounting groove; 13. Slide groove; 14. Threaded rod; 15. Hexagonal swivel head; 16. Screw; 17. First pipe groove; 18. Second pipe groove; 19. Arc groove; 20. Sliding plate; 21. Rotating rod; 22. Anti-slip sleeve; 23. Support frame; 24. First cylinder; 25. First telescopic rod; 26. V-shaped upper limit plate; 27. First guide rod; 28. Second cylinder; 29. ​​Second telescopic rod; 30. V-shaped lower limit plate; 31. Second guide rod; 32. Mating groove; 33. Ball bearing; 34. Third cylinder; 35. Third telescopic rod; 36. Crossbar; 37. Top plate; 38. Angle scale bar; 39. Rubber pad. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0023] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] like Figures 1-5 As shown, it illustrates a pipe bending wheel structure for a pipe bending machine in one embodiment of the present invention, including: a processing table 1, a support plate 2 fixedly installed on the outer right side of the processing table 1, a pipe bending mechanism mounted on the support plate 2, a support frame 23 fixedly installed on the top right side of the processing table 1, and a limiting mechanism mounted on the support frame 23.

[0029] The third cylinder 34 is fixedly installed on the left side of the bottom of the processing table 1. The output end of the third cylinder 34 is fixedly installed with the third telescopic rod 35. The other end of the third telescopic rod 35 is fixedly installed with the crossbar 36. The top plate 37 is fixedly installed on both sides of the top edge of the crossbar 36.

[0030] For example, such as Figure 2 As shown, the pipe bending mechanism includes a pipe bending wheel mechanism and a pipe pressing mechanism. The pipe bending wheel mechanism includes a mounting shaft 3, a support plate 4, a wheel module 5, an I-beam pressing cylinder 6, an external thread 7, a nut 8, and a first pipe groove 17. The mounting shaft 3 is rotatably mounted on the support plate 2. The support plate 4 is fixedly mounted on the mounting shaft 3. The wheel module 5 is movably mounted on the support plate 4. The I-beam pressing cylinder 6 is slidably mounted on the mounting shaft 3 at a position above the wheel module 5. An external thread 7 is provided at the top of the outer wall of the mounting shaft 3. The mounting shaft 3 is threadedly connected to the nut 8 through the external thread 7. Several sets of first pipe grooves 17 are provided on the wheel module 5. The diameter of the several sets of first pipe grooves 17 increases sequentially from top to bottom.

[0031] For example, such as Figure 2 As shown, the pipe pressing mechanism includes a mounting plate 9, a connecting plate 10, a pressing template 11, a mounting groove 12, a sliding groove 13, a threaded rod 14, an internal hexagonal swivel head 15, a screw 16, and a second pipe groove 18. The mounting plate 9 is fixedly mounted on the mounting shaft 3 below the support plate 4. A sliding groove 13 is provided on the mounting plate 9. The connecting plate 10 is slidably mounted inside the sliding groove 13. The threaded rod 14 is rotatably mounted inside the sliding groove 13. The rear end of the threaded rod 14 extends to the outside of the mounting plate 9 and is fixedly mounted with the internal hexagonal swivel head 15. The connecting plate 10 and the threaded rod 16... 4. Threaded connection: The top of the connecting plate 10 has a horizontally opened mounting groove 12. A pressure plate 11 is set at the top of the connecting plate 10. A slide bar is fixedly installed at the bottom of the pressure plate 11. The slide bar is slidably connected to the mounting groove 12. A screw 16 is vertically threaded through the pressure plate 11. The connecting plate 10 has a mounting hole that matches the screw 16. The pressure plate 11 has a second pipe groove 18 that matches each group of first pipe grooves 17. A rotating rod 21 is fixedly installed at the rear end of the bottom of the mounting plate 9. An anti-slip sleeve 22 is fixedly installed on the rotating rod 21.

[0032] For example, such as Figure 2 As shown, an arc-shaped groove 19 is provided on the support plate 2, and a sliding plate 20 is fixedly installed at the bottom of the mounting plate 9. The bottom of the sliding plate 20 is movably connected to the arc-shaped groove 19, and an angle scale strip 38 is fixedly installed on the outer wall of the support plate 2.

[0033] In some examples, in this invention, by providing several sets of first pipe grooves 17 on the wheel module 5, with the diameter of the first pipe grooves 17 increasing sequentially from top to bottom, and by providing second pipe grooves 18 on the pressing plate 11 that match each set of first pipe grooves 17, the same wheel module 5 can be adapted to various pipes of different diameters. This reduces the frequency of downtime for component replacement and decreases wear caused by frequent component replacement. It also improves processing efficiency to some extent. In using this device, the operator only needs to... The pipe is placed inside the corresponding first pipe groove 17, and then the threaded rod 14 is rotated to bring the pressure plate 11 closer to the wheel module 5. Then, the pipe is bent by rotating the rotating rod 21. The operator can control the bending angle by using the angle scale bar 38. In addition, the setting of the I-shaped pressure cylinder 6, external thread 7, nut 8 and screw 16 makes it easy to replace the corresponding wheel module 5 and pressure plate 11 when the first pipe groove 17 on the wheel module 5 does not meet the specifications of the pipe to be processed, thus making the actual use of this device more effective.

[0034] like Figure 1 As shown, this invention illustrates a pipe bending wheel structure for a pipe bending machine in another embodiment of the present invention. The limiting mechanism includes a support frame 23, a first cylinder 24, a first telescopic rod 25, a V-shaped upper limit plate 26, and a first guide rod 27. The support frame 23 is fixedly installed on the right side of the top of the processing table 1. The first cylinder 24 is fixedly installed on the top of the support frame 23. The V-shaped upper limit plate 26 is provided inside the support frame 23. The first telescopic rod 25 is fixedly installed at the output end of the first cylinder 24. The other end of the first telescopic rod 25 is fixedly connected to the V-shaped upper limit plate 26. The first guide rods 27 are vertically and slidably installed on both sides of the top of the support frame 23. The bottom ends of the two sets of first guide rods 27 are fixedly connected to the V-shaped upper limit plate 26.

[0035] For example, such as Figure 5As shown, the limiting mechanism also includes a second cylinder 28, a second telescopic rod 29, a V-shaped lower limiting plate 30, a second guide rod 31, a mating groove 32, and a ball bearing 33. The second cylinder 28 is fixedly installed at the bottom of the processing table 1, directly below the support frame 23. The V-shaped lower limiting plate 30 is located inside the support frame 23, directly below the V-shaped upper limiting plate 26. The output end of the second cylinder 28 is fixedly installed with the second telescopic rod 29, and the other end of the second telescopic rod 29 is fixedly connected to the V-shaped lower limiting plate 30. A second guide rod 31 is fixedly installed on both sides of the bottom end of the V-shaped lower limit plate 30. Both sets of second guide rods 31 are slidably connected to the processing table 1. Several sets of mating grooves 32 are opened on both the V-shaped upper limit plate 26 and the V-shaped lower limit plate 30. The V-shaped upper limit plate 26 and the V-shaped lower limit plate 30 are arranged crosswise through the mating grooves 32. Several sets of rolling balls 33 are movably installed at the ends of the V-shaped upper limit plate 26 and the V-shaped lower limit plate 30 that are close to each other. Rubber pads 39 are fixedly installed at the four corners of the bottom end of the processing table 1.

[0036] In some examples, when using this device to process pipes, the operator can adjust the position of the V-shaped upper limit plate 26 and the V-shaped lower limit plate 30 by activating the first cylinder 24 and the second cylinder 28. This allows the pipe to be supported and raised to a suitable height, effectively preventing vertical displacement or swaying of the pipe during bending. This ensures the pipe is processed according to the preset bending angle and shape, improving bending accuracy and consistency, and reducing scrap rate. In addition, the ball bearing 33 ensures that the limiting mechanism clamps the pipe without hindering its lateral movement, further improving the practicality of the device.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pipe bending wheel structure for a pipe bending machine, characterized in that, include: A processing table (1) is provided with a support plate (2) fixedly installed on the outer right side wall of the processing table (1). A pipe bending mechanism is installed on the support plate (2). A support frame (23) is fixedly installed on the top right side of the worktable (1). A limiting mechanism is installed on the support frame (23). The third cylinder (34) is fixedly installed on the left side of the bottom of the processing table (1). The output end of the third cylinder (34) is fixedly installed with a third telescopic rod (35). The other end of the third telescopic rod (35) is fixedly installed with a crossbar (36). The top plate (37) is fixedly installed on both sides of the top edge of the crossbar (36).

2. The pipe bending wheel structure for a pipe bending machine according to claim 1, characterized in that, The pipe bending mechanism includes a pipe bending wheel mechanism and a pipe pressing mechanism. The pipe bending wheel mechanism includes a mounting shaft (3), a support plate (4), a wheel module (5), an I-beam pressing cylinder (6), an external thread (7), a nut (8), and a first pipe groove (17). The mounting shaft (3) is rotatably mounted on the support plate (2). The support plate (4) is fixedly mounted on the mounting shaft (3). The wheel module (5) is movably mounted on the support plate (4). The I-beam pressing cylinder (6) is slidably mounted on the mounting shaft (3) at a position above the wheel module (5). The top of the outer wall of the mounting shaft (3) is provided with an external thread (7). The mounting shaft (3) is threadedly connected to the nut (8) through the external thread (7). The wheel module (5) is provided with several sets of first pipe grooves (17). The diameter of the several sets of first pipe grooves (17) increases sequentially from top to bottom.

3. The pipe bending wheel structure for a pipe bending machine according to claim 2, characterized in that, The pipe pressing mechanism includes a mounting plate (9), a connecting plate (10), a pressing template (11), a mounting groove (12), a sliding groove (13), a threaded rod (14), an internal hexagonal swivel head (15), a screw (16), and a second pipe groove (18). The mounting plate (9) is fixedly installed on the mounting shaft (3) at a position below the support plate (4). The mounting plate (9) has a sliding groove (13). The connecting plate (10) is slidably installed inside the sliding groove (13). The threaded rod (14) is rotatably installed inside the sliding groove (13). The rear end of the threaded rod (14) extends to the outside of the mounting plate (9) and is fixedly installed with an internal hexagonal swivel head. The rotating head (15) is connected to the connecting plate (10) and the threaded rod (14) by threads. The top of the connecting plate (10) is provided with a horizontal mounting groove (12). A pressure plate (11) is provided at the position directly above the connecting plate (10). A slide bar is fixedly installed at the bottom of the pressure plate (11). The slide bar is slidably connected to the mounting groove (12). A screw (16) is vertically threaded through the pressure plate (11). The connecting plate (10) is provided with a mounting hole that matches the screw (16). The pressure plate (11) is provided with a second pipe groove (18) that matches each group of the first pipe groove (17).

4. The pipe bending wheel structure for a pipe bending machine according to claim 2, characterized in that, A rotating rod (21) is fixedly installed at the bottom rear end of the mounting plate (9), and an anti-slip sleeve (22) is fixedly installed on the rotating rod (21).

5. The pipe bending wheel structure for a pipe bending machine according to claim 2, characterized in that, The support plate (2) has an arc groove (19), and a sliding plate (20) is fixedly installed at the bottom of the mounting plate (9). The bottom of the sliding plate (20) is movably connected to the arc groove (19), and an angle scale strip (38) is fixedly installed on the outer wall of the support plate (2).

6. The pipe bending wheel structure for a pipe bending machine according to claim 1, characterized in that, The limiting mechanism includes a support frame (23), a first cylinder (24), a first telescopic rod (25), a V-shaped upper limit plate (26), and a first guide rod (27). The support frame (23) is fixedly installed on the right side of the top of the processing table (1). The first cylinder (24) is fixedly installed on the top of the support frame (23). The V-shaped upper limit plate (26) is provided inside the support frame (23). The first telescopic rod (25) is fixedly installed at the output end of the first cylinder (24). The other end of the first telescopic rod (25) is fixedly connected to the V-shaped upper limit plate (26). The first guide rod (27) is vertically and slidably installed on both sides of the top of the support frame (23). The bottom ends of the two sets of first guide rods (27) are fixedly connected to the V-shaped upper limit plate (26).

7. The pipe bending wheel structure for a pipe bending machine according to claim 6, characterized in that, The limiting mechanism also includes a second cylinder (28), a second telescopic rod (29), a V-shaped lower limiting plate (30), a second guide rod (31), a mating groove (32), and a ball bearing (33). The second cylinder (28) is fixedly installed at the bottom of the processing table (1) directly below the support frame (23). The V-shaped lower limiting plate (30) is provided inside the support frame (23) directly below the V-shaped upper limiting plate (26). The second telescopic rod (29) is fixedly installed at the output end of the second cylinder (28). The other end of the second telescopic rod (29) is connected to the V-shaped lower limiting plate. The position plate (30) is fixedly connected. The bottom two sides of the V-shaped lower limit plate (30) are fixedly installed with second guide rods (31). The two sets of second guide rods (31) are slidably connected to the processing table (1). The V-shaped upper limit plate (26) and the V-shaped lower limit plate (30) are provided with several sets of mating grooves (32). The V-shaped upper limit plate (26) and the V-shaped lower limit plate (30) are arranged crosswise through the mating grooves (32). Several sets of rolling balls (33) are movably installed at the ends of the V-shaped upper limit plate (26) and the V-shaped lower limit plate (30) that are close to each other.

8. The pipe bending wheel structure for a pipe bending machine according to claim 1, characterized in that, Rubber pads (39) are fixedly installed at the four corners of the bottom of the processing table (1).