Automatic pipe bending machine

Abstract

The invention discloses an automatic pipe bending machine which comprises a pipe bending operation table, a vertical supporting frame, a sleeve seat, an annular chuck and a rotating shaft table. In the using process of the automatic pipe bending machine, after one end of an aluminum pipe is bent, in order to ensure that the end point of the hollow aluminum pipe is locked and shaped, a first-stage lifting rod can be driven to drive an L-shaped seat to vertically ascend and descend; after the L-shaped seat is located at the bottom support position, a first-stage telescopic rod on the surface of the L-shaped seat can be driven to drive a pressure limiting block to support and abut against the bent end of the hollow aluminum pipe, so that multi-end-point supporting of the bent area of the hollow aluminum pipe is kept, the bending curvature of the hollow aluminum pipe is guaranteed, an operator can drive a booster pump, the booster pump can inject pressure into an oil storage pipe, and the oil storage pipe is bent. When the hollow aluminum pipe is bent, lubricating oil in the oil storage pipe can be injected into the oil spraying bin, the lubricating oil in the oil spraying bin can be evenly sprayed to the contact area of the arc-shaped die groove and the hollow aluminum pipe through the lubricating spraying head, and therefore bending abrasion caused when the hollow aluminum pipe makes contact with the pressed column is reduced, and the bending effect of the hollow aluminum pipe is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum tube bending, in particular to an automatic tube bending machine. Background Art

[0002] Hollow aluminum tubes have hollow cross-sections, and their length is much greater than the diameter or circumference of steel. According to the cross-sectional shape, they are divided into round, square, rectangular and special-shaped aluminum tubes; according to the material, they are divided into carbon structural steel aluminum tubes, low alloy structural steel aluminum tubes, alloy steel aluminum tubes and composite aluminum tubes; according to the use, they are divided into aluminum tubes for pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc.; according to the production process, they are divided into seamless aluminum tubes and welded aluminum tubes, of which seamless aluminum tubes are divided into hot-rolled and cold-rolled (drawn) types, and welded aluminum tubes are divided into straight seam welded aluminum tubes and spiral seam welded aluminum tubes.

[0003] Aluminum tubes are not only used to transport fluids and powdered solids, exchange heat, and manufacture mechanical parts and containers, but they are also an economical steel material. Using aluminum tubes to manufacture building structure grids, pillars, and mechanical supports can reduce weight, save 20-40% of metal, and realize factory-based mechanized construction. Using aluminum tubes to manufacture highway bridges can not only save steel and simplify construction, but also greatly reduce the area of ​​protective coating, saving investment and maintenance costs.

[0004] Pipe bending machines can be roughly divided into CNC pipe bending machines, hydraulic pipe bending machines, etc. They are mainly used for laying and repairing pipes in power construction, road and railway construction, boilers, bridges, ships, furniture, decoration, etc. They have the advantages of multiple functions, reasonable structure, and simple operation. In addition to the pipe bending function, this machine can also use the cylinder as a hydraulic jack. Compared with CNC pipe bending equipment, it has the characteristics of low price and easy use.

[0005] The bending of pipes by pipe bending machines is the same as the bending of sheet metal. In the case of pure bending, when a pipe with an outer diameter of D and a wall thickness of t is bent by an external moment M, the outer wall of the neutral layer is subjected to a tensile stress σ1, and the wall becomes thinner; the inner wall of the neutral layer is subjected to a compressive stress σ1, and the wall becomes thicker. Moreover, the shape of the cross section changes from a circle to an ellipse due to the combined forces F1 and F2. When the deformation is too large, cracks will appear on the outer wall and wrinkles will appear on the inner wall.

[0006] In the prior art, the publication number "CN107626815B" discloses an automatic pipe bending machine, including a main body, on which a first feeding mechanism, a cutting mechanism, a second feeding mechanism and a pipe bending mechanism are sequentially installed; the first feeding mechanism conveys the pipe to the cutting mechanism; the cutting mechanism comprises a fixing assembly for fixing the pipe and a cutting assembly for cutting the pipe; the second feeding mechanism conveys the pipe to the pipe bending mechanism; the pipe bending mechanism comprises a first pipe bending assembly and a second pipe bending assembly symmetrically arranged, and the first pipe bending assembly and the second pipe bending assembly bend the pipe in opposite directions in turn. The automatic pipe bending machine of the present invention can realize automatic feeding, cutting, bending and other operations on the pipe, and a whole set of processes are fully automated, which can ensure the cutting length and bending angle, and the pipe after bending has high precision and high yield, and will not damage the quality of the pipe, thereby improving the production efficiency of pipe bending, and has broad market prospects and application prospects.

[0007] However, the existing technology still has major deficiencies, such as:

[0008] In the above-mentioned device and the prior art, during the bending process of the hollow aluminum tube, wear between the aluminum tube and the bending mold cannot be avoided, which can easily cause excessive wear and wrinkles in the bending area of ​​the hollow aluminum tube. At the same time, there is a lack of support for the bent end of the aluminum tube during the bending process, which can easily cause the bent end point of the aluminum tube to rebound, affecting the bending curvature of the aluminum tube. Summary of the invention

[0009] The object of the present invention is to provide an automatic pipe bending machine to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic pipe bending machine, comprising a pipe bending operation table, a vertical support frame, a sleeve seat, an annular chuck and a rotating shaft table, wherein the pipe bending operation table is installed on the top of the vertical support frame, the sleeve seat is installed on the top of the pipe bending operation table, the annular chuck is arranged on one side of the sleeve seat, and the rotating shaft table is installed on the top of the pipe bending operation table away from the annular chuck;

[0011] A hollow aluminum tube surface pressurized support bending unit, which is arranged in the rotating shaft table area and is used to perform multi-end point support pressurized bending on the hollow aluminum tube conveyed in the sleeve seat to ensure the curvature of the aluminum tube bending;

[0012] The hollow aluminum tube surface bending lubrication and wear reduction unit is arranged in the top area of ​​the hollow aluminum tube surface pressure support bending unit, and is used to reduce the friction and wear between the hollow aluminum tube and the rotating shaft table area structure during the bending process.

[0013] Preferably, the hollow aluminum tube surface pressure support bending unit includes a bending part, the bending part includes a pressure column, a sloped top platform is provided on the top of the rotating shaft platform, the pressure column is installed on the top of the sloped top platform, an arc-shaped mold groove is provided on the surface of the pressure column, an annular guide rail is installed on the outer surface of the sloped top platform, a movable arm is installed on the rotating end of the annular guide rail, a concave guide rail is embedded in the top of the movable arm, and a rotating bending pipe pressure block is installed on the top of the movable end of the concave guide rail.

[0014] Preferably, the hollow aluminum tube surface pressure support bending unit also includes a supporting part, which includes a moving platform, which is slidably installed on the top of the bending operation table, and an extension arm is installed on one end of the moving table close to the rotating shaft table, and a limiting groove is arranged on the surface of the extension arm, a supporting bending pressure block is arranged at one end of the top of the extension arm, and a lateral support block is arranged at one end of the top of the extension arm, and the lateral support blocks are arranged in four groups.

[0015] Preferably, the hollow aluminum tube surface pressure support bending unit also includes a pressure limiting part, which includes a first-level lifting rod, which is embedded in the surface of the bending operating table near the rotating shaft table area, and an L-shaped seat is installed on the movable end of the first-level lifting rod, and a first-level lifting and retracting rod is embedded in the surface of the L-shaped seat, and a limiting pressure block is installed on the movable end of the first-level lifting and retracting rod.

[0016] Preferably, the hollow aluminum tube surface bending lubrication and wear reduction unit includes an oblique fixing frame, which is installed on the top of the moving platform, and an oil spray tank is installed at one end of the oblique fixing frame. An oil storage pipe is installed on the top of the oil spray tank, a booster pump is installed on the top of the oil storage pipe, and a lubrication nozzle is installed on the bottom of the oil spray tank.

[0017] Preferably, the sleeve seat area is provided with an aluminum tube bending and rotational anti-detachment unit.

[0018] Preferably, the aluminum tube bending rotational anti-slip unit includes a conveying part, the conveying part includes a primary conveying frame, the primary conveying frame is installed on the top of the tube bending operating table away from one end of the oblique fixed frame, a primary conveying guide wheel is installed on the surface of the primary conveying frame, a secondary conveying frame is installed on the top of the tube bending operating table close to one end of the oblique fixed frame, and a secondary conveying guide wheel is installed on the surface of the secondary conveying frame.

[0019] Preferably, the aluminum tube bending rotational anti-detachment unit also includes a rotational part, which includes a rotating inner sleeve, which is rotatably installed in the inner cavity of the sleeve seat, and the annular chuck is installed at one end of the rotating inner sleeve. An annular groove is provided in the central area of ​​the surface of the annular chuck, and an installation groove is also provided on the surface of the annular chuck. An extension block is installed inside the installation groove, and a pressure arm is slidably installed on the surface of the extension block. A mounting hole is provided on the surface of the extension block, and a movable cylinder rod is installed inside the mounting hole. The movable end of the movable cylinder rod is fixed to one side of the pressure arm, and a circular rubber pad is provided at the bottom of the pressure arm.

[0020] Preferably, a bent aluminum tube support driving unit is provided in the bottom area of ​​the moving platform.

[0021] Preferably, the aluminum tube bending support driving unit includes a strip guide rail, a strip groove is provided at the top of the tube bending operating table near the bottom area of ​​the moving table, the strip guide rail is installed inside the strip groove, a fixed seat is also installed on the top of the tube bending operating table, a limiting rod is installed on one side of the fixed seat and the secondary conveying frame, a limiting arm is sleeved on the surface of the limiting rod, and one side of the limiting arm is fixed to one side of the moving table.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When in use, when the hollow aluminum tube is transmitted to the secondary conveying guide wheel by rotating the inner sleeve, the secondary conveying guide wheel will continuously convey the hollow aluminum tube to the pressure column area on the top of the rotating shaft table. When the hollow aluminum tube is in place, the operator can drive the movable table to move partly by driving the strip guide rail. When the movable table moves, it will drive the support bending block on the surface of the extension arm to stably press the hollow aluminum tube in the arc-shaped die groove on the surface of the pressure column, thereby ensuring the stability of the bending area of ​​the hollow aluminum tube during the bending process;

[0024] 2. When in use, after one end of the aluminum tube is bent, in order to ensure that the end point of the hollow aluminum tube is locked and shaped, the L-shaped seat can be lifted vertically by driving the first-level lifting rod. When the L-shaped seat reaches the bottom support position, the first-level lifting rod on the surface of the L-shaped seat can be driven to drive the pressure limiting block to support the bent end of the hollow aluminum tube, thereby maintaining the multi-end point support of the bending area of ​​the hollow aluminum tube and ensuring the bending curvature of the hollow aluminum tube;

[0025] 3. During use, the operator can drive the booster pump, which will inject pressure into the oil storage pipe. The lubricating oil in the oil storage pipe will be injected into the oil spray tank. The lubricating oil inside the oil spray tank can be evenly sprayed to the contact area between the arc-shaped die groove and the hollow aluminum tube through the lubrication nozzle, thereby reducing the bending wear between the hollow aluminum tube and the pressure column during contact, and ensuring the bending effect of the hollow aluminum tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of the device of the present invention;

[0027] Figure 2 It is a schematic diagram of the strip groove and the strip guide rail in the present invention;

[0028] Figure 3 It is a schematic diagram of the annular chuck portion of the present invention;

[0029] Figure 4 It is a partial schematic diagram of the rotating pillow block in the present invention;

[0030] Figure 5 It is a schematic diagram of the movable arm part of the present invention;

[0031] Figure 6 It is a partial schematic diagram of a mobile station in the present invention;

[0032] Figure 7 It is a partial schematic diagram of the oblique fixing frame in the present invention;

[0033] Figure 8 It is a partial schematic diagram of the L-shaped seat and the pressure limiting block in the present invention.

[0034] In the figure: 1. bending operation table; 11. strip groove; 12. strip guide rail; 13. fixed seat; 14. limit rod; 15. limit arm; 16. primary lifting rod; 17. L-shaped seat; 18. primary lifting and retracting rod; 19. pressure limit block; 2. vertical support frame; 3. sleeve seat; 31. rotating inner sleeve; 4. annular chuck; 41. annular groove; 42. mounting groove; 43. extension block; 44. mounting hole; 45. movable cylinder rod; 46. pressure arm; 47. round rubber pad; 5. primary conveying frame; 51. Primary conveying guide wheel; 6. Secondary conveying frame; 61. Secondary conveying guide wheel; 7. Rotating shaft table; 71. Slope top platform; 72. Pressure column; 73. Arc-shaped die groove; 74. Movable arm; 741. Concave guide rail; 75. Rotating bending pipe pressure block; 76. Annular guide rail; 8. Moving table; 81. Extension arm; 82. Limiting groove; 83. Support bending pipe pressure block; 84. Lateral support block; 9. Oblique fixing frame; 91. Oil spray tank; 92. Oil storage pipe; 93. Booster pump; 94. Lubricating nozzle. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-8 , the present invention provides a technical solution:

[0037] Embodiment 1: An automatic pipe bending machine: comprising a pipe bending operation platform 1, a vertical support frame 2, a sleeve seat 3, an annular chuck 4 and a rotating shaft table 7, wherein the pipe bending operation platform 1 is mounted on the top of the vertical support frame 2, the sleeve seat 3 is mounted on the top of the pipe bending operation platform 1, the annular chuck 4 is arranged on one side of the sleeve seat 3, and the rotating shaft table 7 is mounted on the top of the pipe bending operation platform 1 away from the annular chuck 4;

[0038] The hollow aluminum tube surface pressurized support bending unit is arranged in the rotating shaft table 7 area, and is used to perform multi-end point support pressurized bending on the hollow aluminum tube conveyed in the sleeve seat 3 to ensure the curvature of the aluminum tube bending;

[0039] The hollow aluminum tube surface pressure support bending unit includes a bending part, which includes a pressure column 72. A sloped top platform 71 is provided on the top of the rotating shaft platform 7. The pressure column 72 is installed on the top of the sloped top platform 71. An arc-shaped mold groove 73 is provided on the surface of the pressure column 72. An annular guide rail 76 is installed on the outer surface of the sloped top platform 71. A movable arm 74 is installed on the rotating end of the annular guide rail 76. A concave guide rail 741 is embedded in the top of the movable arm 74. A rotating bending pipe pressure block 75 is installed on the top of the moving end of the concave guide rail 741.

[0040] The hollow aluminum tube surface pressure support bending unit also includes a support part, which includes a movable platform 8, which is slidably installed on the top of the bending operation platform 1, and an extension arm 81 is installed at one end of the movable platform 8 close to the rotating shaft platform 7. A limiting groove 82 is arranged on the surface of the extension arm 81, and a supporting bending block 83 is arranged at one end of the top of the extension arm 81. A lateral support block 84 is arranged at one end of the top of the extension arm 81, and the lateral support blocks 84 are arranged in four groups at intervals.

[0041] The hollow aluminum tube surface pressure support bending unit also includes a pressure limiting part, which includes a first-level lifting rod 16. The first-level lifting rod 16 is embedded in the surface of the bending operating table 1 near the rotating shaft table 7. An L-shaped seat 17 is installed on the movable end of the first-level lifting rod 16. A first-level lifting and retracting rod 18 is embedded in the surface of the L-shaped seat 17. A limiting pressure block 19 is installed on the movable end of the first-level lifting and retracting rod 18.

[0042] In this embodiment, when one end of the aluminum tube is bent, in order to ensure that the end point of the hollow aluminum tube is locked and shaped, the first-level lifting rod 16 can be driven to drive the L-shaped seat 17 to be lifted vertically. When the L-shaped seat 17 reaches the bottom support position, the first-level lifting and shrinking rod 18 on the surface of the L-shaped seat 17 can be driven to drive the pressure limiting block 19 to support the bent end of the hollow aluminum tube, thereby maintaining the multi-end point support of the bending area of ​​the hollow aluminum tube and ensuring the bending curvature of the hollow aluminum tube.

[0043] The hollow aluminum tube surface bending lubrication and wear reduction unit is arranged at the top area of ​​the hollow aluminum tube surface pressure support bending unit, and is used to reduce the friction and wear of the hollow aluminum tube and the rotating shaft table 7 area structure during the bending process;

[0044] The hollow aluminum tube surface bending lubrication and wear reduction unit includes an oblique fixed frame 9, which is installed on the top of the moving platform 8. An oil spray tank 91 is installed at one end of the oblique fixed frame 9. An oil storage pipe 92 is installed on the top of the oil spray tank 91. A booster pump 93 is installed on the top of the oil storage pipe 92. A lubrication nozzle 94 is installed on the bottom of the oil spray tank 91.

[0045] In this embodiment, the lubricating oil inside the oil spray tank 91 can be evenly sprayed toward the contact area between the arc-shaped die groove 73 and the hollow aluminum tube through the lubricating nozzle 94, thereby reducing the bending wear between the hollow aluminum tube and the pressure column 72 during contact and ensuring the bending effect of the hollow aluminum tube.

[0046] The bottom area of ​​the moving platform 8 is provided with an aluminum tube bending support driving unit.

[0047] The aluminum tube bending support driving unit includes a strip guide rail 12. A strip groove 11 is arranged on the top of the tube bending operating platform 1 near the bottom area of ​​the movable platform 8. The strip guide rail 12 is installed inside the strip groove 11. A fixed seat 13 is also installed on the top of the tube bending operating platform 1. A limiting rod 14 is installed on one side of the fixed seat 13 and the secondary conveying frame 6. A limiting arm 15 is sleeved on the surface of the limiting rod 14. One side of the limiting arm 15 is fixed to one side of the movable platform 8.

[0048] Embodiment 2:

[0049] Based on the first embodiment, in this embodiment, it is considered that when the bent pipe is processed, if it encounters multi-stage bending, the bent pipe needs to be adjusted in rotational direction, but the bent pipe lacks centering when rotating, so that the bent pipe is easily offset after flipping, making the aluminum tube eccentric. When the aluminum tube is bent again, the bent end of the aluminum tube cannot be aligned, affecting the bending effect of the aluminum tube. Therefore, in this embodiment, an aluminum tube bending rotation anti-slip unit is provided to avoid the above problem;

[0050] The sleeve seat 3 area is provided with an aluminum tube bending and rotation anti-dropping unit.

[0051] The aluminum tube bending rotational anti-slip unit includes a conveying part, which includes a primary conveying frame 5, which is installed on the top of the tube bending operating platform 1 away from the oblique fixed frame 9. A primary conveying guide wheel 51 is installed on the surface of the primary conveying frame 5, and a secondary conveying frame 6 is installed on the top of the tube bending operating platform 1 close to the oblique fixed frame 9. A secondary conveying guide wheel 61 is installed on the surface of the secondary conveying frame 6.

[0052] The aluminum tube bending rotational anti-detachment unit also includes a rotational part, which includes a rotating inner sleeve 31, which is rotatably installed in the inner cavity of the sleeve seat 3, and an annular chuck 4 is installed at one end of the rotating inner sleeve 31. An annular groove 41 is provided in the central area of ​​the surface of the annular chuck 4, and a mounting groove 42 is also provided on the surface of the annular chuck 4. An extension block 43 is installed inside the mounting groove 42, and a pressure arm 46 is slidably installed on the surface of the extension block 43. A mounting hole 44 is provided on the surface of the extension block 43, and a movable cylinder rod 45 is installed inside the mounting hole 44. The movable end of the movable cylinder rod 45 is fixed to one side of the pressure arm 46, and a circular rubber pad 47 is provided at the bottom of the pressure arm 46.

[0053] In this embodiment, when the rotating inner sleeve 31 rotates, the bent end of the hollow aluminum tube rotates to be inserted into the limit groove 82, and then the operator drives the first-level conveying guide wheel 51 and the second-level conveying guide wheel 61 again to continuously convey the aluminum tube. When the centering and flipping of the hollow aluminum tube is completed, the bending point of the hollow aluminum tube can be prevented from being offset during the bending process, thereby ensuring the bending effect of the hollow aluminum tube.

[0054] Working principle: During the use of this device, the operator first puts the hollow aluminum tube to be bent onto the first-level conveying guide wheel 51 on the top of the first-level conveying frame 5, and then conveys the hollow aluminum tube to the rotating inner sleeve 31 area inside the sleeve seat 3 through the first-level conveying guide wheel 51. When the hollow aluminum tube is transmitted to the second-level conveying guide wheel 61 through the rotating inner sleeve 31, the second-level conveying guide wheel 61 will continue to convey the hollow aluminum tube to the pressure column 72 area on the top of the rotating shaft table 7. When the hollow aluminum tube is in place, the operator can drive the moving platform 8 to partially move by driving the strip guide rail 12. When the moving platform 8 moves, it will drive the support bending block 83 on the surface of the extension arm 81 to stably press the hollow aluminum tube in the arc-shaped mold groove 73 on the surface of the pressure column 72, thereby ensuring the stability of the bending area of ​​the hollow aluminum tube during the bending process;

[0055] After one end of the hollow aluminum tube is stably pressed and held inside the arc-shaped die groove 73, the operator can drive the concave guide rail 741, and the concave guide rail 741 drives the rotating tube bending pressing block 75 to move and press on the bending area of ​​the hollow aluminum tube surface, and then drives the annular guide rail 76, and the annular guide rail 76 will drive the movable arm 74 and the rotating tube bending pressing block 75 to partially rotate, and the rotating tube bending pressing block 75 will press against the surface of the hollow aluminum tube and rotate and bend the hollow aluminum tube during the rotation process. When one end of the aluminum tube is bent, in order to ensure that the end point of the hollow aluminum tube is locked and fixed, the first-level lifting rod 16 can be driven to drive the L-shaped seat 17 to be lifted vertically. When the L-shaped seat 17 reaches the bottom support position, the first-level lifting and shrinking rod 18 on the surface of the L-shaped seat 17 can be driven to drive the pressure limiting block 19 to support and press on the bending end of the hollow aluminum tube, thereby maintaining the multi-end point support of the bending area of ​​the hollow aluminum tube and ensuring the bending curvature of the hollow aluminum tube;

[0056] During the bending process of the hollow aluminum tube, in order to reduce the wear of the bending area on the surface of the hollow aluminum tube, the operator can drive the booster pump 93, and the booster pump 93 will inject pressure into the oil storage pipe 92, and the lubricating oil in the oil storage pipe 92 will be injected into the inside of the oil spraying tank 91, and the lubricating oil in the oil spraying tank 91 can be evenly sprayed to the contact area between the arc-shaped die groove 73 and the hollow aluminum tube through the lubricating nozzle 94, thereby reducing the bending wear between the hollow aluminum tube and the pressure column 72 during the contact, and ensuring the bending effect of the hollow aluminum tube;

[0057] After the hollow aluminum tube is bent once, the hollow aluminum tube is bent again. First, the movable cylinder rod 45 is driven. The movable end of the movable cylinder rod 45 drives the pressure arm 46 to approach the surface of the hollow aluminum tube, and the circular rubber pad 47 at the bottom of the pressure arm 46 is fitted and locked on the surface of the hollow aluminum tube. Then the operator drives the rotating inner sleeve 31 to rotate for centering. When the rotating inner sleeve 31 rotates, the bent end of the hollow aluminum tube rotates to be inserted into the limit groove 82. Then the operator drives the primary conveying guide wheel 51 and the secondary conveying guide wheel 61 again to continuously convey the aluminum tube. When the hollow aluminum tube is centered and turned over, the bending point of the hollow aluminum tube can be prevented from shifting during the bending process, thereby ensuring the bending effect of the hollow aluminum tube.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic pipe bending machine, characterized in that: The invention comprises a pipe bending operation platform (1), a vertical support frame (2), a sleeve seat (3), an annular chuck (4) and a rotating shaft table (7), wherein the pipe bending operation platform (1) is mounted on the top of the vertical support frame (2), the sleeve seat (3) is mounted on the top of the pipe bending operation platform (1), the annular chuck (4) is arranged on one side of the sleeve seat (3), and the rotating shaft table (7) is mounted on the top of the pipe bending operation platform (1) away from the annular chuck (4); A hollow aluminum tube surface pressurized support bending unit, the hollow aluminum tube surface pressurized support bending unit is arranged in the rotating shaft table (7) area, and is used to perform multi-end point support pressurized bending on the hollow aluminum tube transported in the sleeve seat (3), so as to ensure the curvature of the aluminum tube bending; The hollow aluminum tube surface bending lubrication and wear reduction unit is arranged in the top area of ​​the hollow aluminum tube surface pressure support bending unit, and is used to reduce the friction and wear between the hollow aluminum tube and the rotating shaft table (7) area structure during the bending process.

2. The automatic pipe bending machine according to claim 1, characterized in that: The hollow aluminum tube surface pressure support bending unit comprises a bending portion, the bending portion comprises a pressure column (72), a sloped top platform (71) is arranged on the top of the rotating shaft platform (7), the pressure column (72) is installed on the top of the sloped top platform (71), an arc-shaped mold groove (73) is arranged on the surface of the pressure column (72), an annular guide rail (76) is installed on the outer surface of the sloped top platform (71), a movable arm (74) is installed on the rotating end of the annular guide rail (76), a concave guide rail (741) is embedded in the top of the movable arm (74), and a rotating bending pipe pressure block (75) is installed on the top of the movable end of the concave guide rail (741).

3. The automatic pipe bending machine according to claim 2, characterized in that: The hollow aluminum tube surface pressure-supported bending unit also includes a support portion, the support portion includes a movable platform (8), the movable platform (8) is slidably mounted on the top of the tube bending operation platform (1), an extension arm (81) is mounted on one end of the movable platform (8) close to the rotating shaft platform (7), a limiting groove (82) is arranged on the surface of the extension arm (81), a supporting tube bending pressure block (83) is arranged at one end of the top of the extension arm (81), a lateral support block (84) is arranged at one end of the top of the extension arm (81), and the lateral support blocks (84) are arranged in four groups at intervals.

4. The automatic pipe bending machine according to claim 3, characterized in that: The hollow aluminum tube surface pressure-supported bending unit also includes a pressure-limiting portion, which includes a first-level lifting rod (16), which is embedded in the surface of the tube bending operating table (1) near the rotating shaft table (7), an L-shaped seat (17) is installed on the movable end of the first-level lifting rod (16), a first-level lifting and retracting rod (18) is embedded in the surface of the L-shaped seat (17), and a limiting pressure block (19) is installed on the movable end of the first-level lifting and retracting rod (18).

5. The automatic pipe bending machine according to claim 3, characterized in that: The hollow aluminum tube surface bending lubrication and wear reduction unit comprises an oblique fixing frame (9), the oblique fixing frame (9) is mounted on the top of the moving platform (8), an oil spraying tank (91) is mounted on one end of the oblique fixing frame (9), an oil storage pipe (92) is connected to the top of the oil spraying tank (91), a booster pump (93) is connected to the top of the oil storage pipe (92), and a lubrication nozzle (94) is connected to the bottom of the oil spraying tank (91).

6. The automatic pipe bending machine according to claim 5, characterized in that: The sleeve seat (3) area is provided with an aluminum tube bending and rotational anti-dropping unit.

7. An automatic pipe bending machine according to claim 6, characterized in that: The aluminum tube bending rotational anti-slip unit comprises a conveying part, and the conveying part comprises a primary conveying frame (5), the primary conveying frame (5) is installed on the top of the tube bending operating platform (1) away from the end of the oblique fixed frame (9), and a primary conveying guide wheel (51) is installed on the surface of the primary conveying frame (5), and a secondary conveying frame (6) is installed on the top of the tube bending operating platform (1) close to the end of the oblique fixed frame (9), and a secondary conveying guide wheel (61) is installed on the surface of the secondary conveying frame (6).

8. The automatic pipe bending machine according to claim 6, characterized in that: The aluminum tube bending rotational anti-detachment unit also includes a rotational part, which includes a rotating inner sleeve (31), the rotating inner sleeve (31) is rotatably mounted in the inner cavity of the sleeve seat (3), the annular chuck (4) is mounted on one end of the rotating inner sleeve (31), the surface center area of ​​the annular chuck (4) is provided with an annular groove (41), the surface of the annular chuck (4) is also provided with a mounting groove (42), an extension block (43) is installed inside the mounting groove (42), a pressure arm (46) is slidably installed on the surface of the extension block (43), a mounting hole (44) is provided on the surface of the extension block (43), a movable cylinder rod (45) is installed inside the mounting hole (44), the movable end of the movable cylinder rod (45) is fixed to one side of the pressure arm (46), and a circular rubber pad (47) is provided at the bottom of the pressure arm (46).

9. The automatic pipe bending machine according to claim 7, characterized in that: The bottom area of ​​the moving platform (8) is provided with an aluminum tube bending support driving unit.

10. An automatic pipe bending machine according to claim 9, characterized in that: The aluminum tube bending support driving unit comprises a strip guide rail (12); a strip groove (11) is arranged at the top of the tube bending operation platform (1) near the bottom area of ​​the movable platform (8); the strip guide rail (12) is installed inside the strip groove (11); a fixed seat (13) is also installed at the top of the tube bending operation platform (1); a limiting rod (14) is installed between the fixed seat (13) and one side of the secondary conveying frame (6); a limiting arm (15) is sleeved on the surface of the limiting rod (14); one side of the limiting arm (15) is fixed to one side of the movable platform (8).

Images