A pipe bending machine

Abstract

The present application relates to the field of pipe bending technology, and in particular to a pipe bending machine, which includes a frame, two forming assemblies for forming the U-shaped bending part of a steel pipe, and a bending assembly for bending both ends of the steel pipe, wherein the forming assembly includes a forming seat rotatably arranged on the frame and a forming drive member for driving the forming seat to rotate, wherein the forming drive member is arranged on the frame, and the outer wall of the forming seat parallel to the rotation axis includes a forming surface and an avoidance surface, wherein the forming surface is an arc-shaped structure and is provided with a wheel groove extending around the central axis of the forming surface, wherein the forming surface is located on the inner side of the rotation path of the forming surface, and the bending assemblies are rotatably arranged on the frame. The present application can effectively optimize the convenience during unloading and optimize the efficiency of production.

Description

Technical Field

[0001] The present application relates to the field of pipe bending technology, and in particular to a pipe bending machine. Background Art

[0002] Pipes are widely used in various fields because of their excellent mechanical strength and cost-effectiveness. In specific applications, pipes are often used as channels for conveying materials and structural support components. Especially in the field of furniture, steel pipes are often used as one of the components of the support frame of furniture, especially the structural frame of sofas.

[0003] However, due to the structural requirements of furniture, it is often necessary to use U-shaped steel pipes as components of the structural frame. In the prior art, in order to produce U-shaped steel pipes, bending is often used. The bending equipment of the U-shaped steel pipe in the prior art mainly includes a first base arranged on a frame, a bending plate rotatably arranged on the base, and a second base for limiting the rotation of the steel pipe. The second base is arranged on the side of the first base. The first base is formed with an arc surface for forming the bending part of the steel pipe on the side facing the bending plate, and the rotation center of the bending plate coincides with the central axis of the arc surface of the first base. A groove structure with a circular arc cross section is formed on the second base, the first base and the surface where the bending plate contacts the steel pipe, so as to limit the bending direction and angle of the steel pipe and reduce the possibility of the steel pipe deflecting and falling during the bending process.

[0004] When bending, the steel pipe is clamped between the first base, the bending plate and the second base, and the steel pipe is clamped in the groove structure of the three, and then the bending plate is rotated to bend the steel pipe into an L-shaped steel pipe; thereafter, the steel pipe is moved again so that the remaining position of the steel pipe that needs to be bent corresponds to the setting of the first base, and then the bending plate is rotated again to form a U-shaped steel pipe.

[0005] However, in the actual production process, since the steel pipe needs to be bent twice and the steel pipe is clamped in the groove structure, the bent part of the steel pipe and the cross-sectional profile of the bent part will be deformed during the bending process, which will make the steel pipe and the inner wall of the groove structure relatively tightly combined. In the process of disassembling and assembling the steel pipe, due to the limitation of the groove structure, the installation of the steel pipe can only be clamped on the inner side of the groove structure by axial sliding, which will limit the production efficiency of the U-shaped pipe fittings. Summary of the invention

[0006] In order to facilitate unloading and optimize the production efficiency of U-shaped steel pipes, the present application provides a pipe bending machine.

[0007] The present application provides a pipe bending machine, which adopts the following technical solution:

[0008] A pipe bending machine comprises a frame, two forming assemblies for forming a U-shaped bending portion of a steel pipe and a bending assembly for bending both ends of the steel pipe, the forming assembly comprising a forming seat rotatably arranged on the frame and a forming drive member for driving the forming seat to rotate, the forming drive member is arranged on the frame, the outer wall of the forming seat parallel to the rotation axis comprises a forming surface and an avoidance surface, the forming surface is an arc-shaped structure and is provided with a wheel groove extending around the central axis of the forming surface, the avoidance surface is located on the inner side of the rotation path of the forming surface, and the bending assemblies are rotatably arranged on the frame.

[0009] By adopting the above technical scheme, in the process of bending the steel pipe, after the steel pipe is bent by the bending assembly, when the steel pipe needs to be removed, the forming drive member only needs to control the rotation of the forming seat so that the forming surface is separated from the steel pipe by rotation, and the avoidance surface is facing the steel pipe, so that the steel pipe can be separated from the forming seat relative to the forming seat without the need for external force to separate the steel pipe, thereby reducing the possibility of the bent steel pipe being stuck in the wheel groove, thereby effectively optimizing the convenience of steel pipe removal and optimizing production efficiency.

[0010] Optionally, the forming seat includes a forming shaft and an outer sleeve rotatably arranged on the frame and a forming ring detachably connected to the forming shaft, the forming surface, the avoidance surface and the wheel groove are opened on the peripheral outer wall of the forming ring, and the forming shaft is connected to the driving end of the forming drive member.

[0011] By adopting the above technical solution, when it is necessary to bend steel pipes with different bending radii, it is only necessary to remove the forming sleeve and replace the corresponding forming sleeve to adapt to steel pipes with different bending radii, so as to facilitate the disassembly of the steel pipe and adapt to the bending of steel pipes with different bending radii.

[0012] Optionally, two bending assemblies are provided, and the bending assemblies include a bending seat rotatably connected to a frame, a bending plate for abutting and following the bending and sliding movement of both ends of the steel pipe, and a bending driving member for driving the bending seat to rotate, the rotation axis of the bending plate coincides with the rotation axis of the forming seat, and a wheel groove is also formed on the outer wall of the bending plate on one side facing the rotation axis of the bending seat, the bending plate is slidably connected to the bending seat, and the bending driving member is arranged on the frame.

[0013] By adopting the above technical scheme, when bending the steel pipe, only two bending driving members are needed to drive the two bending seats to rotate respectively, thereby driving the two bending plates to move around the central axis of the two forming surfaces respectively, and bending the two ends of the steel pipe toward the same side, so as to realize the bending of the U-shaped steel pipe. At the same time, since the bending plate is slidably connected to the bending seat, it can also adapt to the axial slippage of the end of the steel pipe due to the bending radius during the bending process, thereby effectively reducing the wear of the steel pipe caused by friction during the bending process, so as to optimize the convenience of unloading and reduce the damage caused by the bent steel pipe; at the same time, when there is no need to bend the U-shaped steel pipe, only one of the bending components can be started to perform L-shaped steel pipe or V-shaped steel pipe bending.

[0014] Optionally, the bending plate is slidably connected to the bending seat through a bending adjustment member, and the bending adjustment member includes an adjustment seat slidably connected to the bending seat, a bending fixed seat arranged on the adjustment seat, and a bending adjuster for controlling the sliding of the bending fixed seat, the sliding direction of the adjustment seat is perpendicular to the sliding direction of the bending plate, the bending adjuster is arranged on the bending seat, and the bending plate is slidably connected to the bending fixed seat.

[0015] By adopting the above technical solution, when bending the steel pipe, it is only necessary to control the sliding of the adjustment seat relative to the bending seat through the bending adjuster, thereby controlling the sliding of the bending plate, and clamping the steel pipe between the wheel groove on the bending plate and the wheel groove on the forming surface. After the steel pipe is bent, it is only necessary to move the bending plate away from the forming surface to unload, so as to further optimize the convenience during bending, thereby further optimizing the efficiency during production.

[0016] Optionally, the adjustment seat is provided with a bending control member for controlling the sliding movement of the bending fixed seat relative to the adjustment seat, the bending control member includes a bending control seat fixedly connected to the adjustment seat and a bending control rod passed through and slidably connected to the bending control seat, the bending control rod is fixedly connected to the bending control seat through two groups of bending control nuts that clamp the bending control seat, and the bending control rod is fixedly connected to the adjustment seat.

[0017] By adopting the above technical solution, since steel pipes of different sizes need to be bent during the furniture production process, it is only necessary to rotate the bending control nut to make the bending control rod slide relative to the bending control seat, thereby realizing the change of the distance between the bending plate and the forming surface, so as to reduce the possibility of being unable to adapt to steel pipes of different sizes due to insufficient telescopic path of the bending drive component.

[0018] Optionally, the bending seat is provided with a return spring for controlling the bending plate to slide in the bending direction of the steel pipe.

[0019] By adopting the above technical solution, after the bending plate slides with the steel pipe, when the bending drive part controls the bending fixed seat to move away from the forming surface, the return spring can pull the bending plate to slide along the length direction of the bent end of the steel pipe, thereby assisting the steel pipe to detach from the bending plate, reducing the possibility of the steel pipe being stuck in the wheel groove of the bending plate, so as to further optimize the convenience of unloading.

[0020] Optionally, at least two wheel grooves are provided on the bending plate and the forming seat, and the bending seat is provided with a positioning member for aligning and positioning the steel pipe, the positioning member includes a positioning plate and a positioning rod passing through and slidably connected to the positioning plate, the positioning rod is fixedly connected to the bending fixing seat, and the positioning plate is located on the sliding path of the bending plate.

[0021] By adopting the above technical scheme, two steel pipes can be bent at the same time to further improve the bending efficiency of the steel pipes. At the same time, when bending the steel pipes, one end of the steel pipe can be abutted against the positioning plate, and the positioning plate cooperates with the positioning rod to align the ends of the two steel pipes. In this way, the bending part of the steel pipe can be positioned while reducing the possibility of different bending parts of the two steel pipes due to bending the two steel pipes at the same time, thereby optimizing the bending efficiency and the bending accuracy.

[0022] Optionally, the frame is provided with two limiting members for limiting and positioning the bending angle of the steel pipe, the limiting members include a limiting seat arranged on the frame and a limiting plate hinged to the limiting seat, the rotation plane of the limiting plate is parallel to the rotation plane of the forming seat, and the two limiting plates are respectively located on opposite sides of the ends of the bending rotation path at both ends of the steel pipe.

[0023] By adopting the above technical solution, during the bending process of the steel pipe, the bending angle of the steel pipe can be limited by the limiting plate hinged to the limiting seat, so as to reduce the possibility of excessive bending of the steel pipe.

[0024] Optionally, the limiting seat is slidably disposed on the frame, and the limiting seat is fixedly connected to the frame via limiting bolts.

[0025] By adopting the above technical solution, the limiting seat can be fixed to the frame by limiting bolts after the limiting seat slides relative to the frame, so as to adapt to steel pipes with different bending angles.

[0026] Optionally, the frame is provided with a clamping assembly for clamping and flattening the steel pipe, the clamping assembly includes a clamping hydraulic cylinder fixedly connected to the frame, a clamping plate for clamping the steel pipe and a fixed plate, the clamping plate is fixedly connected to the telescopic end of the clamping hydraulic cylinder, the fixed plate is fixedly connected to the frame and is located between two forming seats, the clamping hydraulic cylinder and the clamping plate are located on the side of the two forming seats away from the bending direction of the steel pipe, and the telescopic direction of the telescopic end of the clamping hydraulic cylinder is perpendicular to the distribution direction of the two forming seats.

[0027] By adopting the above technical solution, in the process of bending the steel pipe, the telescopic end of the clamping hydraulic cylinder can be used to control the clamping plate to slide toward the fixed plate, so that the steel pipe can be clamped between the fixed plate and the clamping plate, thereby reducing the possibility of the steel pipe falling freely relative to the forming surface and the bending plate after separation; and when the steel pipe needs to be flattened, the fixed plate can cooperate with the clamping plate to flatten the clamped part of the steel pipe.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] In the process of bending the steel pipe, after the steel pipe is bent by the bending assembly, when the steel pipe needs to be removed, the forming drive member only needs to control the rotation of the forming seat so that the forming surface is separated from the steel pipe by rotation, and the avoidance surface is facing the steel pipe, so that the steel pipe can be separated from the forming seat relative to the forming seat without the need for external force to separate the steel pipe, so as to reduce the possibility of the bent steel pipe being stuck in the wheel groove; and in this process, the sliding of the bending plate further assists in separating the steel pipe from the bending plate, thereby effectively optimizing the convenience of steel pipe removal and optimizing production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0031] Figure 2 It is a first structural schematic diagram of a forming component and a bending component in an embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the structure of the forming seat in the embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the structure of the bending seat in the embodiment of the present application.

[0034] Figure 5 It is a second structural schematic diagram of the forming component and the bending component in the embodiment of the present application.

[0035] Figure 6 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0036] Figure 7 yes Figure 1 Schematic diagram of the enlarged structure of part B.

[0037] Explanation of the reference numerals: 1. frame; 11. limiting member; 111. limiting seat; 112. limiting plate; 113. limiting bolt; 114. connecting plate; 115. long strip hole; 12. supporting member; 121. supporting screw; 122. supporting nut; 2. forming assembly; 21. forming seat; 211. forming surface; 212. avoidance surface; 213. wheel groove; 214. forming shaft; 215. forming sleeve; 22. forming drive member; 3. bending assembly; 31. bending seat; 311. bending sleeve; 312. bending connecting arm; 313. bending adjustment groove; 314. connecting port; 32. bending plate; 33. bending drive member; 331. driving hydraulic cylinder ;332, bending rack;333, bending gear ring;34, bending adjustment member;341, adjustment seat;342, bending fixed seat;343, bending adjuster;344, bending slide groove;35, bending control member;351, bending control seat;352, bending control rod;353, bending control nut;36, return spring;37, positioning member;371, positioning plate;372, positioning rod;373, positioning seat;374, fixing plate;375, positioning bolt;5, clamping assembly;51, clamping hydraulic cylinder;52, clamping plate;521, clamping seat;522, clamping top plate;53, fixing plate;531, fixing seat;532, fixing splint. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The present application embodiment discloses a pipe bending machine. Figure 1 The pipe bending machine includes a frame 1, two forming assemblies 2 and a bending assembly 3 for forming a U-shaped bending portion of a steel pipe. The two forming assemblies 2 are horizontally distributed and are both arranged on the frame 1. Two bending assemblies 3 are provided, and the two bending assemblies 3 are respectively arranged on the opposite sides of the two forming assemblies 2. The bending assembly 3 is arranged on the frame 1. The bending assembly 3 is used to bend the two ends of the steel pipe to form a U-shaped steel pipe.

[0040] Reference Figure 2 and Figure 3 The forming assembly 2 includes a forming seat 21 rotatably disposed on the frame 1 and a forming driving member 22 for driving the forming seat 21 to rotate, and the forming driving member 22 is disposed on the frame 1.

[0041] Specifically, the forming seat 21 includes a forming shaft 214 rotatably connected to the frame 1 and an annular forming collar 215. One end of the forming shaft 214 is connected to the power output end of the forming drive member 22 and is rotatably connected to the frame 1. The other end of the forming shaft 214 is a stepped shaft structure with the small end facing away from the frame 1. The inner wall of the forming collar 215 is a stepped shaft structure, and the transition surface of the inner wall of the forming collar 215 abuts against the stepped surface of the outer wall of the forming shaft 214. The forming collar 215 is fixedly connected to the forming shaft 214 by bolts to realize the disassembly and assembly of the forming collar 215, so as to adapt to U-shaped steel pipes with different bending radius specifications.

[0042] Reference Figure 2 and Figure 3 The outer wall of the forming collar 215 includes a forming surface 211 and an avoidance surface 212. The forming surface 211 is an arc surface parallel to the central axis of the forming collar 215. The avoidance surface 212 is connected to the two end edges of the forming surface 211 along the circumference of the forming collar 215. The avoidance surface 212 is located on the inner side of the path of the circumferential rotation of the forming surface 211, so as to reduce the restriction on the formed U-shaped steel pipe during rotation.

[0043] Preferably, the avoidance surface 212 is a plane, and the forming surface 211 is provided with two wheel grooves 213 distributed along the axial direction of the forming collar 215, so as to clamp two steel pipes at the same time and optimize the efficiency of steel pipe bending. The extension path of the wheel groove 213 is arc-shaped and the extension path of the wheel groove 213 is arranged coaxially with the forming collar 215, and the cross-sectional profile of the wheel groove 213 is arc-shaped, so as to adapt to the profile of the outer wall of the steel pipe. Of course, in other embodiments, the avoidance surface 212 can also be an irregular curved surface, a wavy curved surface or a broken line curved surface.

[0044] When bending the steel pipe, it is only necessary to clamp the two steel pipes and abut against the inner walls of the two wheel grooves 213 through the bending parts of the two bending components 3, and then bend the two ends of the two steel pipes through the bending components 3 to form a U-shaped steel pipe; and when unloading, it is only necessary to reset the bending part of the bending component 3 first, and then drive the forming shaft 214 to rotate through the forming drive member 22, so that the steel pipe is separated from the relative forming surface 211, and then it is only necessary to directly take the steel pipe out from between the forming collar 215 and the bending component 3. At the same time, the avoidance surface 212 is made to face the steel pipe, so that the steel pipe can be naturally separated from the forming collar 215, effectively reducing the possibility of the steel pipe being stuck in the wheel groove 213 due to the slight deformation generated locally during the bending process. Compared with directly taking it out from the wheel groove 213, it is necessary to drive the steel pipe to separate from the wheel groove 213 with external force, which can reduce the rebound caused by the external force after the steel pipe is bent, thereby achieving the convenience of disassembling the steel pipe and assisting in reducing the rebound of the steel pipe.

[0045] Reference Figure 2 and Figure 3, two forming drive members 22 are provided corresponding to the two forming shafts 214, so as to respectively drive the two forming shafts 214 to rotate. The forming drive member 22 is a motor or a rotary hydraulic cylinder. In the embodiment of the present application, the forming drive member 22 is a rotary hydraulic cylinder. The large end of the forming shaft 214 is rotatably connected to the frame 1 and coaxially fixedly connected to the power output end of the forming drive member 22, so as to drive the forming shaft 214 to rotate.

[0046] Reference Figure 2 and Figure 3 Specifically, the bending assembly 3 includes a bending seat 31 rotatably connected to the frame 1, a bending plate 32 and a bending driving member 33 for driving the bending seat 31 to rotate, and the bending plate 32 is slidably connected to the bending seat 31 through a bending adjusting member 34. Among them, the bending driving member 33 is arranged on the frame 1.

[0047] Reference Figure 2 and Figure 4 The bending seat 31 includes a bending sleeve 311 and a bending connecting arm 312. The bending sleeve 311 is covered and rotatably connected to the forming shaft 214. One end of the bending sleeve 311 is rotatably connected to the frame 1. The end of the bending sleeve 311 connected to the frame 1 is connected to the power output end of the bending driving member 33 to drive the bending sleeve 311 to rotate. The other end of the bending sleeve 311 is fixedly connected to the bending connecting arm 312, and the length direction of the bending connecting arm 312 is perpendicular to the central axis of the bending sleeve 311.

[0048] In addition, the bending drive member 33 includes a driving hydraulic cylinder 331, a bending rack 332 fixedly connected to the telescopic end of the driving hydraulic cylinder 331, and a bending gear ring 333 which is mounted on the outer cover and fixedly connected to the bending sleeve 311, and the cylinder body of the driving hydraulic cylinder 331 is fixedly connected to the frame 1. The bending rack 332 is slidably connected to the inside of the frame 1, and the bending rack 332 is meshed with the bending gear ring 333. Among them, the bending racks 332 of the two bending drive members 33 are staggered, so that when bending the steel pipe, it is only necessary to drive the hydraulic cylinder 331 to drive the bending gear ring 333 to rotate through the bending rack 332, so as to drive the bending sleeve 311 to rotate, so as to drive the bending connecting arm 312 to rotate.

[0049] Of course, in other embodiments, the bending drive member 33 may also adopt a rotary hydraulic cylinder, the rotating end of the bending drive member 33 is annular or tubular, and the rotating end of the bending drive member 33 is coaxially fixedly connected to the bending sleeve 311.

[0050] Reference Figure 4 and Figure 5The bending adjustment member 34 includes an adjustment seat 341, a bending fixed seat 342 and a bending adjuster 343. The bending connecting arm 312 is provided with a bending adjustment groove 313 extending in the length direction. The bending adjustment groove 313 is a dovetail groove. The adjustment seat 341 is adapted and slidably connected to the inner wall of the bending adjustment groove 313. The bending connecting arm 312 is provided with a connecting port 314 penetrating in the thickness direction of the adjustment seat 341. The connecting port 314 is connected to the bending adjustment groove 313. The bending adjuster 343 is a hydraulic cylinder, and the cylinder body of the bending adjuster 343 is hinged to the bending connecting arm 312. The telescopic end of the bending adjuster 343 passes through the connecting port 314 and is hinged to the adjustment seat 341, so as to drive the adjustment seat 341 to slide. Of course, in other embodiments, the bending adjuster 343 can also be set as an electric push cylinder.

[0051] The adjustment seat 341 is provided with a plurality of threaded holes distributed along the sliding direction, and the bending fixing seat 342 is fixedly connected to the adjustment seat 341 by bolts inserted into and threadedly connected to the threaded holes on the adjustment seat 341, so as to adjust the distance between the bending fixing seat 342 and the center of the forming ring 215 to adapt to different bending angles and steel pipe diameters.

[0052] Reference Figure 4 and Figure 5 The bending fixed seat 342 is provided with a bending sliding groove 344 on the end surface facing the forming sleeve 215. The bending sliding groove 344 is a dovetail groove and its extension direction is perpendicular to the central axis of the bending sleeve 311 and the length direction of the bending connecting arm 312, so that the bending plate 32 can slide relative to the bending fixed seat 342 following the end of the steel pipe when the steel pipe is bent. The bending plate 32 is clamped and slidably connected to the inner wall of the bending sliding groove 344, and the plate surface of the bending plate 32 facing away from the bending fixed seat 342 is also provided with a wheel groove 213, and the extension direction of the wheel groove 213 on the bending plate 32 is parallel to the sliding direction of the bending plate 32. Among them, the bending fixed seat 342 is fixedly connected with a reset spring 36 for resetting the bending plate 32, and the reset spring 36 is used to drive the bending plate 32 to slide toward the end of the steel pipe after bending.

[0053] When bending the steel pipe, the bending plate 32 is moved to the bottom of the forming ring 215, and then the bending adjuster 343 controls the adjustment seat 341 to slide, so that the bending fixed seat 342 slides toward the steel pipe, so that the steel pipe is clamped between the wheel groove 213 on the forming surface 211 and the wheel groove 213 on the bending plate 32, and then the bending drive member 33 drives the bending sleeve 311 to rotate, thereby driving the bending connecting arm 312 to rotate around the forming ring 215. During this process, due to the bending radius caused by the existence of the forming surface 211 when the steel pipe is bent, the distance between the end of the steel pipe and the middle of the steel pipe will shrink to a certain extent. At this time, the bending plate 32 can slide relative to the bending fixed seat 342 to adapt to the displacement of the steel pipe during the bending process, so as to reduce the wear of the steel pipe caused by friction during the bending process. At the same time, it can also reduce the possibility of the steel pipe being stuck in the wheel groove 213 due to burrs caused by wear, thereby reducing the difficulty of disassembling the steel pipe, achieving the convenience of disassembly and assembly while reducing the possibility of wear of the steel pipe during the bending process. In addition, after the bending is completed, the bending regulator 343 controls the bending plate 32 to loosen relative to the steel pipe through the bending fixed seat 342, and during this process, the bending plate 32 is reset under the action of the reset spring 36, so that the bent steel pipe is separated from the bending plate 32, so as to reduce the impact on the rebound of the steel pipe and further optimize the convenience of disassembly of the steel pipe.

[0054] Reference Figure 5 In addition, during the process of bending the steel pipe, the bending plate 32 and the bending fixing seat 342 need to bear a relatively large load, and during this process, the bending fixing seat 342 will generate torque. In order to reduce the possibility of the bending fixing seat 342 being loose relative to the adjustment seat 341 due to the torque borne by the bending fixing seat 342, the adjustment seat 341 is provided with a bending control member 35 for controlling the bending fixing seat 342 to slide relative to the adjustment seat 341.

[0055] The bending control member 35 includes a bending control seat 351 and a bending control rod 352 that penetrates and is slidably connected to the bending control seat 351. The bending control rod 352 is covered with two sets of bending control nuts 353 that are threadedly connected. The two sets of bending control nuts 353 clamp the bending control seat 351 to fix the bending control rod 352 to the bending control seat 351. The bending control nuts 353 in the same group include at least one bending control nut 353. The bending control nuts 353 in the same group can be set to one, two or more. In the embodiment of the present application, the same group includes one bending control nut 353.

[0056] When replacing steel pipes of different specifications and sizes and changing the bending radius, it is only necessary to rotate the two bending control nuts 353 to control the distance between the bending fixing seat 342 and the bending control seat 351, so as to adapt to steel pipes of different specifications and sizes and bending radii, and at the same time assist in supporting the bending fixing seat 342 to reduce the influence of torque on the stability of the bending fixing seat 342 during the bending process of the steel pipe; thereby achieving the effect of adapting to steel pipes of different specifications and sizes and bending radii while reducing the influence on the stability of the steel pipe during the bending process.

[0057] Of course, in other embodiments, the bending control rod 352 of the bending control member 35 may also be plugged into the bending fixed seat 342, and the bending control nut 353 may be fixedly connected to the bending control seat 351. At this time, after the position of the bending fixed seat 342 relative to the adjustment seat 341 changes, it is only necessary to rotate the bending control rod 352 so that the bending control rod 352 slides relative to the bending control seat 351.

[0058] Reference Figure 5 Specifically, since there are two wheel grooves 213 on the bending plate 32, that is, two steel pipes need to be bent at the same time, in order to optimize the convenience of bending the steel pipes after bending while optimizing the bending accuracy, the bending seat 31 is provided with a positioning member 37 for aligning and positioning the two steel pipes. The positioning member 37 is connected to the bending connecting arm 312 through the bending adjustment member 34.

[0059] The positioning member 37 includes a positioning plate 371 and a positioning rod 372. The positioning plate 371 includes a positioning seat 373 and a fixing plate 374 fixedly connected to the positioning seat 373. The positioning rod 372 is passed through and slidably connected to the positioning seat 373. The positioning rod 372 is fixedly connected to the positioning rod 372 by a positioning bolt 375 passed through the positioning seat 373, and the plate surface of the fixing plate 374 is perpendicular to the positioning rod 372. The fixing plate 374 is located on the sliding path of the bending plate 32. The positioning rod 372 is parallel to the sliding direction of the bending plate 32, and the positioning rod 372 is inserted in the bending fixing seat 342. The positioning rod 372 is fixedly connected to the bending fixing seat 342 by other positioning bolts 375 inserted in the bending fixing seat 342, so as to facilitate the disassembly and assembly of the positioning member 37, so that when the bending plate 32 is replaced to adapt to steel pipes of different sizes, the positioning member 37 can be reused.

[0060] When placing the steel pipes on the bending plate 32, the two steel pipes can be aligned by simply placing one end of the two steel pipes against the fixing plate 374 at the same time. At the same time, when bending steel pipes of different lengths, the positioning seat 373 can be adapted to the length of different steel pipes by simply loosening the positioning bolts 375 so that the positioning seat 373 slides relative to the positioning rod 372. Thereafter, the positioning seat 373 is fixedly connected to the positioning rod 372 by the positioning bolts 375.

[0061] Of course, in other embodiments, the positioning member 37 may also be an L-shaped plate fixedly connected to the bending plate 32, and the steel pipe is aligned and positioned by the protrusion of the positioning member 37. Or the positioning rod 372 is fixedly connected to the bending fixing seat 342 by integral molding or welding.

[0062] Similarly, in other embodiments, the bending assembly 3 may also include an arc-shaped slide rail fixedly connected to the frame 1, the slide rail and the forming sleeve 215 are arranged on the same central axis, and the bending seat 31 is clamped and slidably connected to the slide rail, and the bending seat 31 is driven to slide by a hydraulic cylinder hinged to the frame 1 for bending steel pipes.

[0063] Reference Figure 5 and Figure 6 In addition, in order to facilitate the installation and fixing of the steel pipe, the frame 1 is provided with a clamping assembly 5 for clamping the steel pipe, and the clamping assembly 5 includes a clamping hydraulic cylinder 51, a clamping plate 52 and a fixing plate 53. The cylinder body of the clamping hydraulic cylinder 51 is fixedly connected to the frame 1, and the telescopic end of the clamping hydraulic cylinder 51 is fixedly connected to the clamping plate 52. The clamping hydraulic cylinder 51 and the clamping plate 52 are located below the two forming collars 215, and the telescopic direction of the telescopic end of the clamping hydraulic cylinder 51 is perpendicular to the distribution direction of the two forming collars 215 and is vertically arranged. The fixing plate 53 is fixedly connected to the frame 1, and the fixing plate 53 is located between the two forming collars 215.

[0064] Reference Figure 5 and Figure 6 Specifically, the clamping plate 52 includes a clamping seat 521 fixedly connected to the telescopic end of the clamping hydraulic cylinder 51 and a clamping top plate 522 detachably connected to the clamping seat 521 by bolts. The clamping top plate 522 is located on the side of the clamping seat 521 facing the forming collar 215, so as to cooperate with the fixing plate 53 to clamp and fix the steel pipe, and can also flatten the steel pipe according to processing needs. Among them, the side plate surface of the clamping top plate 522 facing the forming collar 215 is also provided with a wheel groove 213, and when it is for steel pipes of different specifications and sizes, the clamping top plate 522 can be replaced to adapt to steel pipes of different specifications and sizes.

[0065] The fixing plate 53 includes a fixing seat 531 fixedly connected to the frame 1 and a fixing clamping plate 532 detachably connected to the fixing seat 531 toward the clamping top plate 522 by bolts. The fixing seat 531 is located between the two forming collars 215, and the fixing clamping plate 532 is used to cooperate with the clamping top plate 522 to clamp the steel pipe, so as to cooperate with the replacement of the clamping top plate 522 and the forming collar 215 to adapt to steel pipes of different specifications.

[0066] Reference Figure 7Specifically, since both ends of the steel pipe will be bent, in order to reduce the possibility of excessive bending of the two ends of the steel pipe, the frame 1 is provided with two limiting members 11 for limiting and positioning the two ends of the steel pipe.

[0067] The limiting member 11 includes a limiting seat 111 and a limiting plate 112 disposed on the frame 1. The limiting seat 111 is an L-shaped plate structure, and the horizontal parts of the two limiting seats 111 are disposed opposite to each other. The limiting seat 111 is located on the side of the forming collar 215 away from the clamping plate 52. A reinforcing rib is disposed inside the bent part of the limiting seat 111 to increase the load bearing capacity of the limiting seat 111.

[0068] Reference Figure 7 The limiting plate 112 is hinged to the vertical part of the L-shaped plate structure of the limiting seat 111 through the connecting plate 114, and the connecting plate 114 is a U-shaped plate structure. The vertical part and the horizontal part of the limiting seat 111 are both provided with a long strip hole 115, and the long strip hole 115 extends vertically along the vertical part of the limiting seat 111 where it is located or extends horizontally along the horizontal part of the limiting seat 111.

[0069] The limiting seat 111 is fixedly connected to the frame 1 through the limiting bolts 113 passing through the long strip holes 115 on the horizontal part thereof, so as to adapt to different bending angles. The connecting plate 114 is fixedly connected to the limiting seat 111 through the bolts passing through the long strip holes 115 on the vertical part of the limiting seat 111, and the limiting plate 112 is partially clamped between the two side plates of the connecting plate 114. The limiting plate 112 is connected to the connecting plate 114 by rotation, so that the limiting plate 112 is hinged to the limiting seat 111 through the connecting plate 114, so as to adapt to the angle after the end of the steel pipe is bent. The rotation plane of the limiting plate 112 is parallel to the rotation plane of the forming sleeve 215, and the outer wall of the limiting plate 112 on one side away from the limiting seat 111 is also provided with two wheel grooves 213, so as to adapt and locate the positions of the two ends of the steel pipe after being bent, so as to timely detect the steel pipe that is deflected after bending. The path of the bending plate 32 rotating around the central axis of the forming collar 215 is located on the side of the limiting plate 112 facing the forming collar 215 .

[0070] When in use, the two ends of the steel pipe can be respectively abutted against the wheel grooves 213 on the two limiting plates 112 through the bending plate 32, so as to limit the bending angle of the steel pipe and reduce the possibility of excessive bending of the steel pipe; at the same time, when bending the steel pipe, the bending plate 32 can also be used to squeeze the steel pipe, so that the steel pipe bends toward between the two limiting plates 112 during the bending process, and then the steel pipe is reset by rebounding, thereby further optimizing the bending accuracy of the steel pipe.

[0071] Reference Figure 7In addition, in order to optimize the pressure that the limiting seat 111 bears when the steel pipe abuts against the limiting plate 112, a support member 12 for assisting in supporting the two limiting seats 111 is provided on the edge of the limiting seat 111 away from the frame 1.

[0072] The support member 12 includes a support screw 121 and two groups of support nuts 122. The two ends of the support screw 121 are respectively inserted into the two limiting seats 111. Specifically, the limiting seat 111 has two installation openings, and the support screw 121 is clamped in the installation openings of the limiting seat 111. The support nut 122 is sleeved and threadedly connected to the support screw 121. The same group includes at least two support nuts 122. In the embodiment of the present application, the same group is provided with two support nuts 122. The edge of the limiting seat 111 is clamped between the two support nuts 122 of the same group, so as to support and limit the limiting seat 111, and can also adapt to the change of the relative position between the two limiting seats 111.

[0073] The implementation principle of the embodiment is as follows: when bending a U-shaped steel pipe, the steel pipe only needs to be clamped between the clamping top plate 522 and the clamping plate 52, and then the clamping top plate 522 is controlled by the clamping hydraulic cylinder 51 to make the steel pipe abut against the clamping plate 52. Thereafter, the two bending driving members 33 respectively drive the two bending plates 32 to bend the ends of the steel pipe through the two bending seats 31, so that the two ends of the steel pipe are bent toward the limiting seat 111 under the action of the two forming collars 215, and the ends of the steel pipe are abutted against the limiting plate 112.

[0074] After the steel pipe is bent, the bending regulator 343 controls the bending fixed seat 342 to slide in the direction away from the forming collar 215, so that the bending plate 32 is separated from the steel pipe, and in this process, the return spring 36 drives the bending plate 32 to slide toward one side of the limiting seat 111, so that the steel pipe is separated from the bending plate 32 and the rebound of the steel pipe due to external force is reduced; simultaneously in this process, the forming drive member 22 drives the forming collar 215 to rotate through the forming shaft 214, so that the avoidance surface 212 faces the steel pipe, so as to reduce the possibility of the steel pipe being stuck in the wheel groove 213 on the forming collar 215; finally, the clamping hydraulic cylinder 51 controls the clamping plate 52 to separate from the fixed plate 53, and the steel pipe can be separated under the action of gravity, so that the clamping assembly 5 cooperates with the avoidance surface 212 and the resetting of the bending plate 32 to achieve relatively stable and convenient unloading of the steel pipe, while reducing the influence of the unloading process on the rebound of the steel pipe and the possibility of damage to the steel pipe.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe bending machine, characterized in that: It includes a frame, two forming assemblies for forming the U-shaped bending part of the steel pipe and a bending assembly for bending the two ends of the steel pipe, the forming assembly includes a forming seat rotatably arranged on the frame and a forming driving member for driving the forming seat to rotate, the forming driving member is arranged on the frame, the outer wall of the forming seat parallel to the rotation axis includes a forming surface and an avoidance surface, the forming surface is an arc-shaped structure and is provided with a wheel groove extending around the central axis of the forming surface, the avoidance surface is located on the inner side of the rotation path of the forming surface, and the bending assemblies are respectively rotatably arranged on the frame; There are two bending assemblies, which include a bending seat rotatably connected to the frame, a bending plate for abutting and following the bending and sliding movement of the two ends of the steel pipe, and a bending driving member for driving the bending seat to rotate. The rotation axis of the bending plate coincides with the rotation axis of the forming seat. The outer wall of the bending plate on one side facing the rotation axis of the bending seat is also formed with a wheel groove. The bending plate is slidably connected to the bending seat, and the bending driving member is arranged on the frame. The bending plate is slidably connected to the bending seat through a bending adjustment member, the bending adjustment member includes an adjustment seat slidably connected to the bending seat, a bending fixed seat arranged on the adjustment seat, and a bending adjuster for controlling the sliding of the bending fixed seat, the sliding direction of the adjustment seat is perpendicular to the sliding direction of the bending plate, the bending adjuster is arranged on the bending seat, and the bending plate is slidably connected to the bending fixed seat; The forming seat comprises a forming shaft and a sleeve rotatably arranged on the frame and detachably connected to the forming shaft, a forming surface, an avoidance surface and a wheel groove are arranged on the peripheral outer wall of the forming sleeve, and the forming shaft is connected to the driving end of the forming driving member; The adjusting seat is provided with a bending control member for controlling the sliding movement of the bending fixed seat relative to the adjusting seat. The bending control member includes a bending control seat fixedly connected to the adjusting seat and a bending control rod penetrated through and slidably connected to the bending control seat. The bending control rod is fixedly connected to the bending control seat through two groups of bending control nuts that clamp the bending control seat, and the bending control rod is fixedly connected to the adjusting seat.

2. A pipe bending machine according to claim 1, characterized in that: The bending seat is provided with a return spring for controlling the bending plate to slide in the bending direction of the steel pipe.

3. A pipe bending machine according to claim 2, characterized in that: There are at least two wheel grooves on the bending plate and the forming seat, and the bending seat is provided with a positioning member for aligning and positioning the steel pipe. The positioning member includes a positioning plate and a positioning rod that passes through and is slidably connected to the positioning plate. The positioning rod is fixedly connected to the bending fixed seat, and the positioning plate is located on the sliding path of the bending plate.

4. A pipe bending machine according to claim 1, characterized in that: The frame is provided with two limiting members for limiting and positioning the bending angle of the steel pipe. The limiting members include a limiting seat arranged on the frame and a limiting plate hinged to the limiting seat. The rotation plane of the limiting plate is parallel to the rotation plane of the forming seat, and the two limiting plates are respectively located on the opposite sides of the ends of the bending rotation path at both ends of the steel pipe.

5. A pipe bending machine according to claim 4, characterized in that: The limiting seat is slidably arranged on the frame, and the limiting seat is fixedly connected to the frame through limiting bolts.

6. A pipe bending machine according to claim 1, characterized in that: The frame is provided with a clamping assembly for clamping and flattening the steel pipe, the clamping assembly includes a clamping hydraulic cylinder fixedly connected to the frame, a clamping plate for clamping the steel pipe and a fixed plate, the clamping plate is fixedly connected to the telescopic end of the clamping hydraulic cylinder, the fixed plate is fixedly connected to the frame and is located between two forming seats, the clamping hydraulic cylinder and the clamping plate are located on the side of the two forming seats away from the bending direction of the steel pipe, and the telescopic direction of the telescopic end of the clamping hydraulic cylinder is perpendicular to the distribution direction of the two forming seats.

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