A ton barrel metal pipe bending device

Abstract

The present invention relates to the field of pipe bending devices, and specifically to a ton barrel metal pipe bending device. It includes a processing table, a bending mechanism, a first driving mechanism and a second driving mechanism; the bending mechanism includes four groups of fixed bending components respectively distributed at the four corners of the processing table rectangle, two groups of first movable bending components respectively distributed on the outside of the two groups of fixed bending components in the rear row, and two groups of second movable bending components respectively distributed on the outside of the two groups of fixed bending components in the front row; the rear row fixed bending components and the adjacent first movable bending components are connected by a first connecting component, and a first clamping space is formed between the rear row fixed bending components and the adjacent first movable bending components; the two groups of fixed bending components in the front row and the adjacent second movable bending components are connected by a second connecting component, and a second clamping space is formed between the front row fixed bending components and the adjacent second movable bending components. The present invention can bend a straight metal pipe into a rounded rectangular metal pipe through a two-step bending operation, which simplifies the processing process, saves time and improves efficiency.

Description

Technical Field

[0001] The invention relates to the field of pipe bending devices, in particular to a ton barrel metal pipe bending device. Background Art

[0002] In the field of mechanical processing, metal pipes are usually straight pipes after initial processing. However, in actual use, the straight pipes need to be bent into the required shape. For example, for the outer frame of a ton barrel, multiple rounded rectangular metal pipes are needed. Multiple rectangular metal pipes and straight pipes are welded into an outer frame.

[0003] Chinese patent announcement number CN212469348U discloses a high-precision pipe bending machine, including a base, grooves are arranged on both sides of the upper end surface of the base, sliding seats are arranged inside the two grooves, the sliding seats can slide freely left and right inside the grooves, the bottoms of the two sliding seats are connected by a lead screw, a slide groove is opened on the upper end surface of the sliding seat, a slider is arranged inside the slide groove, the slider slides freely inside the slide groove, a movable bending wheel is arranged on the upper end surface of the slider, a hydraulic cylinder is arranged at one end of the outer side of the sliding seat, the hydraulic cylinder is connected to the slider through a telescopic rod, a fixed bending wheel is arranged on the middle upper end surface of the base, and a limited position block is arranged on one side of the fixed bending wheel. The bending machine effectively expands the application scope of the bending machine, improves the working efficiency of pipe bending, has high bending accuracy, improves the qualified rate of finished products, reduces production costs, and has a simple device structure and is easy to operate.

[0004] However, the above technical solution has the following shortcomings:

[0005] Only one corner can be bent at a time. If a straight metal pipe is bent into a rounded rectangular metal pipe, four bending operations are required in succession. The processing process is cumbersome, time-consuming and inefficient. Summary of the invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and to propose a ton barrel metal tube bending device which can bend a straight metal tube into a rounded rectangular metal tube through a two-step bending operation, thereby simplifying the processing procedure, saving time and improving efficiency.

[0007] The technical solution of the present invention is a ton barrel metal tube bending device, comprising a processing table, a bending mechanism, a first driving mechanism and a second driving mechanism; the bending mechanism comprises four groups of fixed bending components respectively distributed at the four corners of the processing table rectangle, two groups of first movable bending components respectively distributed at the outsides of the two rear groups of fixed bending components, and two groups of second movable bending components respectively distributed at the outsides of the two front groups of fixed bending components; the rear row of fixed bending components and the adjacent first movable bending components are all connected by a first connecting component, and a first clamping space is formed between the rear row of fixed bending components and the adjacent first movable bending components; the two front row of fixed bending components and the adjacent second movable bending components are all connected by a second connecting component, and a second clamping space is formed between the front row of fixed bending components and the adjacent second movable bending components; the first driving mechanism drives the first movable bending component to rotate around the adjacent fixed bending component to bend the straight metal tube into a U-shaped metal tube; the second driving mechanism drives the second movable bending component to rotate around the adjacent fixed bending component to bend the U-shaped metal tube into a rounded rectangular metal tube.

[0008] Preferably, the fixed bending assembly, the first movable bending assembly and the second movable bending assembly have the same structure, and all include a mounting column, a plurality of clamping assemblies rotatably disposed at the top of the mounting column and evenly distributed around the mounting column, a supporting ring disposed on the outer circumferential surface of the mounting column, a lifting platform rotatably connected to the plurality of clamping assemblies, and a lifting mechanism vertically disposed on the mounting column and driving the lifting platform to rise and fall; when the lifting platform descends, the plurality of clamping assemblies are brought together in a cone shape, and when the lifting platform rises, the plurality of clamping assemblies are gradually expanded to a vertical state; and the mounting column in the fixed bending assembly is disposed on a processing table.

[0009] Preferably, the clamping assembly includes a clamping plate rotatably arranged at the top of the mounting column, a first connecting platform arranged on the inner side of the clamping plate, a second connecting platform arranged on the lifting platform, and a connecting rod rotatably connected to the first connecting platform and the second connecting platform at both ends. The outer side surface of the clamping plate is an arc-shaped surface, and the horizontal cross-sectional area of ​​the clamping plate gradually decreases from bottom to top.

[0010] Preferably, the first connecting component includes a connecting seat rotatably set on the mounting column in the rear fixed bending component, a first sliding platform slidably set on the connecting seat, and a first threaded knob threadedly connected to the connecting seat and rotatably connected to the first sliding platform. The mounting column in the first movable bending component is fixedly or rotatably set on the first sliding platform.

[0011] Preferably, the second connecting assembly includes a first connecting frame rotatably set on the mounting column in the front fixed bending assembly, a guide rod vertically set at the bottom of the first connecting frame, a second connecting frame slidably set on the guide rod, a base plate set at the bottom end of the guide rod, a first spring sleeved on the periphery of the guide rod and the top and bottom ends of which are respectively connected to the second connecting frame and the base plate, a second sliding platform slidably set on the second connecting frame, and a second threaded knob threadedly connected to the second connecting frame and rotatably connected to the second sliding platform. The mounting column in the second movable bending assembly is fixedly or rotatably set on the second sliding platform.

[0012] Preferably, the first driving mechanism includes a first gear arranged on the connecting seat and coaxially distributed with the mounting column in the rear-row fixed bending assembly, a first rack horizontally distributed and meshingly connected to the first gear, a first mounting table arranged on the first rack, and a first hydraulic cylinder arranged at the bottom of the processing table and driving the first mounting table to move horizontally; the second driving mechanism includes a second gear arranged on the first connecting frame and coaxially distributed with the mounting column in the front-row fixed bending assembly, a second rack horizontally distributed and meshingly connected to the second gear, a second mounting table arranged on the second rack, and a second hydraulic cylinder arranged at the bottom of the processing table and driving the second mounting table to move horizontally.

[0013] Preferably, pressure-blocking assemblies are provided on both sides of the processing table in the horizontal direction, and the pressure-blocking assemblies include a sliding rod vertically slidably arranged on the processing table, a third threaded knob vertically rotatably arranged on the processing table, and a horizontally distributed limit plate connected to the top of the sliding rod and threadedly connected to the third threaded knob.

[0014] Preferably, it also includes a positioning assembly, which includes a positioning seat, a sliding column horizontally slidably arranged on the positioning seat, a positioning platform and an end plate respectively connected to the two ends of the sliding column, and a second spring sleeved on the outer peripheral side of the sliding column and connected to the positioning platform and the positioning seat at both ends.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention can bend a straight metal tube into a rounded rectangular metal tube through a two-step bending operation. Specifically, during the bending, the straight metal tube is first bent into a U-shaped metal tube, and then the U-shaped metal tube is bent into a rounded rectangular metal tube, which simplifies the processing procedure, saves time and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of clamping a straight metal tube according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of bending a straight metal tube into a U-shaped metal tube;

[0019] Figure 3 A schematic diagram of the structure of bending a U-shaped metal tube into a rounded rectangular metal tube;

[0020] Figure 4 A partial cross-sectional view of the principle structure of bending a straight metal tube into a U-shaped metal tube;

[0021] Figure 5 for Figure 4 A magnified view of the structure at center A;

[0022] Figure 6 A partial cross-sectional view of the principle structure of bending a U-shaped metal tube into a rounded rectangular metal tube.

[0023] 1. The first connecting frame; 2. The second connecting frame; 3. The second connecting frame; 4. The first connecting frame; 5. The second connecting frame; 6. The second connecting frame; 7. The first and second connecting frames; 8. The first and second connecting frames; 9. The first and second connecting frames; 10. The second and second connecting frames; 11. The first and second connecting frames; 12. The second and second connecting frames; 13. The second and second connecting frames; 14. The first and second connecting frames; 15. The first and second connecting frames; 16. The first and second connecting frames; 17. The second and second connecting frames; 18. The second and second connecting frames; 19. The second and third connecting frames; 20. The second and third connecting frames; 21. The first and second connecting frames; 22. The second and second connecting frames; 23. The second and second connecting frames; 24. The first and second connecting frames; 25. The second and second connecting frames; 26. The second and second connecting frames; 27. The second and second connecting frames; 28. The second and second connecting frames; 29. ​​The third and third connecting frames; 30. The second and third connecting frames; 31. The second and third connecting frames; 32. The second and third connecting frames; 33. The second and third connecting frames; 34. The second and third connecting frames; 35. The second and third connecting frames; 36. The second and third connecting frames; 37. The second and third connecting frames; 38. The second and third connecting frames; 39. The third and third connecting frames; 40. The third and third connecting frames; 41. The third and third connecting frames; 42. The third and third connecting frames; 43. The third and third connecting frames; 44. The third and third connecting frames; 45. The third and third connecting frames; 46. The third and third connecting frames; 47. The third and third connecting frames; 48. The third and third connecting frames; 49. DETAILED DESCRIPTION

[0024] Embodiment 1, as Figure 1-Figure 6 As shown, a ton barrel metal tube bending device proposed in this embodiment includes a processing table 1, a bending mechanism, a first driving mechanism and a second driving mechanism.

[0025] The bending mechanism includes four groups of fixed bending components respectively distributed at the four corners of the rectangular processing table 1, two groups of first movable bending components respectively distributed at the outside of the two groups of fixed bending components in the rear row, and two groups of second movable bending components respectively distributed at the outside of the two groups of fixed bending components in the front row. The four groups of fixed bending components are distributed at the four corners of the rectangle, which is convenient for bending the straight metal tube 100 into a rounded rectangular metal tube 100 in the future. The rear fixed bending components and the adjacent first movable bending components are connected by the first connecting components, and a first clamping space is formed between the rear fixed bending components and the adjacent first movable bending components, and the first clamping space is used to place the metal tube 100. The two groups of fixed bending components in the front row and the adjacent second movable bending components are connected by the second connecting components, and a second clamping space is formed between the front fixed bending components and the adjacent second movable bending components, and the second clamping space is used to move the metal tube 100 in.

[0026] The first driving mechanism drives the first movable bending assembly to rotate around the adjacent fixed bending assembly to bend the straight metal tube 100 into a U-shaped metal tube 100, that is, to bend it at two locations.

[0027] The second driving mechanism drives the second movable bending component to rotate around the adjacent fixed bending component to bend the U-shaped metal tube 100 into a rounded rectangular metal tube 100, that is, to bend it at two other places. After bending, the two ends of the entire metal tube 100 are relatively distributed. During subsequent processing, the two ends are flattened in the horizontal direction, and then through holes are drilled respectively, and then a connecting plate with two corresponding connecting holes is placed in place. Bolts are used to pass through the connecting holes and the through holes, and nuts are screwed on the other side, so that the two ends of the metal tube 100 are firmly connected to obtain a pipe that can be used for welding the outer frame of a ton barrel.

[0028] The present embodiment can bend a straight metal tube 100 into a rounded rectangular metal tube 100 through a two-step bending operation. During the specific bending, the straight metal tube 100 is first bent synchronously at two locations through two rear sets of fixed bending components and two sets of first bending components to bend the straight metal tube 100 into a U-shaped metal tube 100, and then the U-shaped metal tube 100 is bent synchronously at another two locations through two front sets of fixed bending components and two sets of second bending components, thereby simplifying the processing procedure, saving time, and improving efficiency.

[0029] Embodiment 2, as Figure 1-Figure 6 As shown, a ton barrel metal pipe bending device proposed in this embodiment, compared with the first embodiment, in this embodiment, the fixed bending assembly, the first movable bending assembly and the second movable bending assembly have the same structure, all of which include a mounting column 2, a plurality of clamping assemblies rotatably arranged at the top of the mounting column 2 and evenly distributed around the mounting column 2, a support ring 9 arranged on the outer circumference of the mounting column 2, a lifting platform 7 rotatably connected to the plurality of clamping assemblies, and a lifting mechanism 8 vertically arranged on the mounting column 2 and driving the lifting platform 7 to rise and fall, and the lifting mechanism 8 adopts a hydraulic cylinder or an air cylinder or other structure that can drive the lifting platform 7 to rise and fall linearly. When the lifting platform 7 descends, the plurality of clamping assemblies are brought together in a cone shape, with the top end being the most close. When the lifting platform 7 rises, the plurality of clamping assemblies are gradually unfolded to a vertical state. In the initial state, the clamping assembly in the rear fixed bending assembly and / or the first movable bending assembly is adjusted to a close state, so that the upper opening of the first clamping space is enlarged, which is convenient for placing the straight metal pipe 100. After the metal pipe 100 falls onto the support ring 9, the clamping assembly in the rear fixed bending assembly and / or the first movable bending assembly is adjusted to a vertical state to clamp the metal pipe 100, which is convenient for the subsequent bending process of the metal pipe 100. The mounting column 2 in the fixed bending assembly is set on the processing table 1.

[0030] like Figure 4 and Figure 5As shown, the clamping assembly includes a clamping plate 3 rotatably arranged at the top of the mounting column 2, a first connecting platform 4 arranged on the inner side of the clamping plate 3, a second connecting platform 6 arranged on the lifting platform 7, and a connecting rod 5 rotatably connected to the first connecting platform 4 and the second connecting platform 6 at both ends. The outer side of the clamping plate 3 is an arc-shaped curved surface, and the horizontal cross-sectional area of ​​the clamping plate 3 gradually decreases from bottom to top, so that multiple clamping plates 3 will not interfere with each other when they are close together. When the lifting mechanism 8 drives the lifting platform 7 to move downward, the lifting platform 7 drives the connecting rod 5 to move through the second connecting platform 6, and the connecting rod 5 drives the clamping plate 3 to rotate inward through the first connecting platform 4. Similarly, when the lifting mechanism 8 drives the lifting platform 7 to move upward, it will drive the clamping plate 3 to rotate outward through the second connecting platform 6, the connecting rod 5 and the first connecting platform 4, and rotate the clamping plate 3 to a vertical state to clamp the metal pipe 100 in a regular manner.

[0031] like Figure 4 As shown, the first connecting assembly includes a connecting seat 10 rotatably arranged on the mounting post 2 in the rear fixed bending assembly, a first sliding platform 11 slidably arranged on the connecting seat 10, and a first threaded knob 12 threadedly connected to the connecting seat 10 and rotatably connected to the first sliding platform 11. The mounting post 2 in the first movable bending assembly is fixedly or rotatably arranged on the first sliding platform 11. If the mounting post 2 in the first movable bending assembly is fixedly arranged on the first sliding platform 11, the first movable bending assembly only has a revolution motion, and when the first movable bending assembly bends the metal tube 100, there is a sliding contact between the first movable bending assembly and the metal tube 100; if the mounting post 2 in the first movable bending assembly is rotatably arranged on the first sliding platform 11, and it rotates smoothly, then when the first movable bending assembly bends the metal tube 100, the first movable bending assembly has both revolution and rotation motions, and there is a rolling contact between the first movable bending assembly and the metal tube 100. By rotating the first threaded knob 12, the first sliding platform 11 can be driven to slide on the connecting seat 10, and the distance between the rear bending component and the first bending component can be adjusted to adjust the size of the first clamping space, which is suitable for clamping and bending metal pipes 100 of different diameters.

[0032] like Figure 6As shown, the second connecting assembly includes a first connecting frame 21 rotatably set on the mounting column 2 in the front fixed bending assembly, a guide rod 22 vertically set at the bottom of the first connecting frame 21, a second connecting frame 25 slidably set on the guide rod 22, a bottom plate 23 set at the bottom end of the guide rod 22, a first spring 24 sleeved on the outer periphery of the guide rod 22 and the top and bottom ends of which are respectively connected to the second connecting frame 25 and the bottom plate 23, a second sliding platform 26 slidably set on the second connecting frame 25, and a second threaded knob 27 threadedly connected to the second connecting frame 25 and rotatably connected to the second sliding platform 26. The mounting column 2 in the second movable bending assembly is fixedly or rotatably set on the second sliding platform 26. If the mounting column 2 in the second movable bending assembly is fixedly arranged on the second sliding platform 26, the second movable bending assembly only has a revolution motion, and when the second movable bending assembly bends the metal tube 100, it is in sliding contact with the metal tube 100; if the mounting column 2 in the second movable bending assembly is rotatably arranged on the second sliding platform 26, it is a smooth rotation, and when the second movable bending assembly bends the metal tube 100, the second movable bending assembly has both a revolution and a rotation motion, and is in rolling contact with the metal tube 100. By rotating the second threaded knob 27, the second sliding platform 26 can be driven to slide on the second connecting frame 25, and the distance between the front fixed bending assembly and the second bending assembly can be adjusted to adjust the size of the second clamping space, which is suitable for clamping and bending metal tubes 100 of different diameters.

[0033] When the metal tube 100 is bent from a straight shape to a U-shape, the multiple groups of clamping assemblies in the second bending assembly are adjusted to a conical close state. When the metal tube 100 passes through the clamping plate 3, it will move on the inclined clamping plate 3. The thrust of the metal tube 100 on the clamping plate 3 pushes the clamping plate 3 downward, and the second connecting frame 25 moves downward and compresses the first spring 24. The first connecting frame 21 will not interfere with the downward movement of the second bending assembly. When the metal tube 100 passes through the top of the clamping assembly in the second bending assembly and contacts the clamping plate 3 in the front row of the fixed bending assembly, the metal tube 100 is bent into a U-shaped tube, the first spring 24 releases elastic potential energy and pushes the second connecting frame 25 upward, and the clamping assembly in the second bending assembly moves upward. Then, the multiple groups of clamping assemblies in the second bending assembly are adjusted to a state where the clamping plate 3 is vertically distributed through the lifting mechanism 8, and the U-shaped metal tube 100 is clamped by the front row of fixed bending assemblies and the second bending assemblies to prepare for the subsequent bending of the metal tube 100.

[0034] The distance between the front bending assembly and the second bending assembly and the distance between the rear bending assembly and the first bending assembly should be uniform so as to bend metal tubes 100 of the same size.

[0035] like Figure 4As shown, the first driving mechanism includes a first gear 13 disposed on the connecting seat 10 and coaxially distributed with the mounting column 2 in the rear-arranged bending assembly, a first rack 14 horizontally distributed and meshingly connected with the first gear 13, a first mounting platform 15 disposed on the first rack 14, and a first hydraulic cylinder 16 disposed at the bottom of the processing table 1 and driving the first mounting platform 15 to move horizontally. The first hydraulic cylinder 16 drives the first mounting platform 15 to move, the first mounting platform 15 drives the first rack 14 to move, the first rack 14 drives the first gear 13 to rotate, the first gear 13 drives the connecting seat 10 to rotate, and the connecting seat 10 drives the first bending assembly to rotate around the mounting column 2 in the rear-arranged bending assembly to bend the straight metal pipe 100 into a U-shaped metal pipe 100.

[0036] like Figure 6 As shown, the second driving mechanism includes a second gear 17 disposed on the first connecting frame 21 and coaxially distributed with the mounting column 2 in the front fixed bending assembly, a second rack 18 horizontally distributed and meshingly connected with the second gear 17, a second mounting platform 19 disposed on the second rack 18, and a second hydraulic cylinder 20 disposed at the bottom of the processing table 1 and driving the second mounting platform 19 to move horizontally. The second hydraulic cylinder 20 drives the second mounting platform 19 to move, the second mounting platform 19 drives the second rack 18 to move, the second rack 18 drives the second gear 17 to rotate, and the second gear 17 drives the second bending assembly to rotate around the mounting column 2 in the front fixed bending assembly through the second connecting assembly, so as to bend the U-shaped metal tube 100 into a rounded rectangular metal tube 100.

[0037] Embodiment three, as Figure 1-Figure 6 As shown, a ton barrel metal tube bending device proposed in this embodiment, compared with the second embodiment, in this embodiment, both sides of the processing table 1 in the horizontal direction are provided with a pressure block assembly, and the pressure block assembly includes a slide bar vertically slidably arranged on the processing table 1, a third threaded knob 29 vertically rotated arranged on the processing table 1, and a horizontally distributed limit plate 28 connected to the top of the slide bar and threadedly connected to the third threaded knob 29. When the straight metal tube 100 is bent into a U-shaped metal tube 100, the metal tube 100 pushes the clamping plate 3 in the second bending assembly to move downward. Before this, the metal tube 100 first enters under the limit plate 28, and the limit plate 28 is used to limit the height of the metal tube 100 to prevent the reaction force of the clamping plate 3 on the metal tube 100 from pushing the metal tube 100 upward to an inclined state. The height of the limit plate 28 can be adjusted by rotating the third threaded knob 29 to limit the height of metal tubes 100 of different diameters.

[0038] Embodiment 4, as Figure 1-Figure 6As shown, the present embodiment proposes a ton barrel metal tube bending device. Compared with the first embodiment, in the present embodiment, the bending device also includes a positioning assembly, the positioning assembly includes a positioning seat 33, a sliding column horizontally slidably arranged on the positioning seat 33, a positioning platform 30 and an end plate 31 respectively connected to the two ends of the sliding column, and a second spring 32 which is sleeved on the outer peripheral side of the sliding column and connected to the positioning platform 30 and the positioning seat 33 at both ends.

[0039] In this embodiment, the positions of both ends of the final metal tube product are analyzed according to the shape of the rounded rectangular metal tube 100 to be processed, and the positioning seat 33 is set in advance at the required position. When the straight metal tube 100 is initially placed, one end of the metal tube 100 is just against the positioning platform 30, and then the metal tube 100 is clamped by the rear-arranged bending assembly and the first bending assembly. When the metal tube 100 is bent, the end of the metal tube 100 will slightly push the positioning platform 30 outward, and the second spring 32 will be compressed. After the metal tube 100 is turned away, the second spring 32 will be reset, and the positioning assembly will not interfere with the bending process of the metal tube 100. For the final bent metal tube product, the two ends of the metal tube 100 are basically symmetrically distributed, as shown in FIG. Figure 3 , so that the bending device can be used to bend metal tube products with basically uniform specifications in batches.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A ton barrel metal tube bending device, characterized in that: include: Processing table (1); A bending mechanism, comprising four groups of fixed bending assemblies respectively distributed at the four corners of a rectangular processing table (1), two groups of first movable bending assemblies respectively distributed at the outside of the two groups of fixed bending assemblies in the rear row, and two groups of second movable bending assemblies respectively distributed at the outside of the two groups of fixed bending assemblies in the front row; the fixed bending assemblies in the rear row and the adjacent first movable bending assemblies are connected by a first connecting assembly, and a first clamping space is formed between the fixed bending assemblies in the rear row and the adjacent first movable bending assemblies; the two groups of fixed bending assemblies in the front row and the adjacent second movable bending assemblies are connected by a second connecting assembly, and a second clamping space is formed between the fixed bending assemblies in the front row and the adjacent second movable bending assemblies; A first driving mechanism for driving a first movable bending assembly to rotate around an adjacent fixed bending assembly to bend a straight metal tube (100) into a U-shaped metal tube (100); A second driving mechanism for driving the second movable bending assembly to rotate around an adjacent fixed bending assembly to bend the U-shaped metal tube (100) into a rounded rectangular metal tube (100); The fixed bending assembly, the first movable bending assembly and the second movable bending assembly have the same structure, and all include a mounting column (2), a plurality of clamping assemblies rotatably arranged at the top of the mounting column (2) and evenly distributed around the mounting column (2), a supporting ring (9) arranged on the outer peripheral surface of the mounting column (2), a lifting platform (7) rotatably connected to the plurality of clamping assemblies, and a lifting mechanism (8) vertically arranged on the mounting column (2) and driving the lifting platform (7) to move up and down, when the lifting platform (7) descends, the plurality of clamping assemblies are brought together in a cone shape, and when the lifting platform (7) rises, the plurality of clamping assemblies are gradually expanded to a vertical state, and the mounting column (2) in the fixed bending assembly is arranged on the processing table (1); The clamping assembly comprises a clamping plate (3) rotatably arranged at the top end of the mounting column (2), a first connecting platform (4) arranged on the inner side of the clamping plate (3), a second connecting platform (6) arranged on the lifting platform (7), and a connecting rod (5) rotatably connected to the first connecting platform (4) and the second connecting platform (6) at both ends, respectively; the outer side surface of the clamping plate (3) is an arc-shaped curved surface, and the horizontal cross-sectional area of ​​the clamping plate (3) gradually decreases from bottom to top; The device also includes a positioning assembly, which includes a positioning seat (33), a sliding column horizontally slidably arranged on the positioning seat (33), a positioning platform (30) and an end plate (31) respectively connected to both ends of the sliding column, and a second spring (32) sleeved on the outer peripheral side of the sliding column and connected to the positioning platform (30) and the positioning seat (33) at both ends.

2. A ton barrel metal tube bending device according to claim 1, characterized in that: The first connecting component comprises a connecting seat (10) rotatably arranged on a mounting post (2) in a rear fixed bending component, a first sliding platform (11) slidably arranged on the connecting seat (10), and a first threaded knob (12) threadedly connected to the connecting seat (10) and rotatably connected to the first sliding platform (11), wherein the mounting post (2) in the first movable bending component is fixedly or rotatably arranged on the first sliding platform (11).

3. A ton barrel metal tube bending device according to claim 2, characterized in that: The second connecting assembly comprises a first connecting frame (21) rotatably arranged on the mounting column (2) in the front fixed bending assembly, a guide rod (22) vertically arranged at the bottom of the first connecting frame (21), a second connecting frame (25) slidably arranged on the guide rod (22), a bottom plate (23) arranged at the bottom end of the guide rod (22), a first spring (24) sleeved on the outer periphery of the guide rod (22) and the top and bottom ends of which are respectively connected to the second connecting frame (25) and the bottom plate (23), a second sliding platform (26) slidably arranged on the second connecting frame (25), and a second threaded knob (27) threadedly connected to the second connecting frame (25) and rotatably connected to the second sliding platform (26), wherein the mounting column (2) in the second movable bending assembly is fixedly or rotatably arranged on the second sliding platform (26).

4. A ton barrel metal tube bending device according to claim 3, characterized in that: The first driving mechanism comprises a first gear (13) arranged on the connecting seat (10) and coaxially distributed with the mounting column (2) in the rear fixed bending assembly, a first rack (14) horizontally distributed and meshingly connected with the first gear (13), a first mounting platform (15) arranged on the first rack (14), and a first hydraulic cylinder (16) arranged at the bottom of the processing table (1) and driving the first mounting platform (15) to move horizontally; the second driving mechanism comprises a second gear (17) arranged on the first connecting frame (21) and coaxially distributed with the mounting column (2) in the front fixed bending assembly, a second rack (18) horizontally distributed and meshingly connected with the second gear (17), a second mounting platform (19) arranged on the second rack (18), and a second hydraulic cylinder (20) arranged at the bottom of the processing table (1) and driving the second mounting platform (19) to move horizontally.

5. The ton barrel metal tube bending device according to claim 3 is characterized in that: Pressure-blocking assemblies are arranged on both sides of the processing table (1) in the horizontal direction. The pressure-blocking assemblies include a slide bar vertically slidably arranged on the processing table (1), a third threaded knob (29) vertically rotatably arranged on the processing table (1), and a limit plate (28) horizontally distributed, connected to the top of the slide bar and threadedly connected to the third threaded knob (29).

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