A pipe bender

Abstract

The application relates to the technical field of pipe bending, in particular to a pipe bending machine which comprises a machine body assembly, a heating assembly is connected to the machine body assembly, the heating assembly is used for heating a pipe fitting; a feeding assembly is installed on the machine body assembly, the feeding assembly is located at a feeding end of the heating assembly, and is used for feeding the heating assembly; a bending assembly is installed on the machine body assembly, the bending assembly is located at a discharging end of the heating assembly, is used for bending a pipe, and realizes clamping and releasing of the pipe; and a telescopic assembly is connected with one end of the machine body assembly and the other end of the bending assembly, is used for driving the bending assembly to move towards or away from the heating assembly.

Description

Technical Field

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

[0002] Different car models have different internal components with varying sizes and relative positions, resulting in different installation spaces. Therefore, nylon bending and shaping tubes need to be customized according to the actual needs of each car model. Currently, pipe bending is mainly done through two methods: mold forming or automatic bending by a bending machine. The former is suitable for mass production, while the latter offers greater flexibility.

[0003] The prior art discloses an automatic thermoforming equipment for automotive oil pipes, comprising a feeding tray, a feeding guide wheel, a feeding clamp assembly, a feeding machine assembly, a heating assembly, a Z-axis motor, a bending wheel assembly, a rotating arm, a rotating shaft, a motor, and a frame. The feeding tray is located at the right end of the frame's table, the feeding machine assembly is located at the left end of the frame's feeding clamp assembly, the heating assembly is located at the left end of the feeding machine assembly, the Z-axis motor is located on the side of the heating assembly, and a rotating wheel is fitted onto the left end of the nozzle connector. The rotating wheel meshes with the Z-axis motor via gears, the rotating wheel's panel is connected to the rotating arm, and a rotatable bending wheel assembly is located on the left end face of the nozzle connector. The lower end of the rotating shaft inside the rotating arm is connected to the bending wheel of the bending wheel assembly, and the reducer at the lower end of the motor is connected to the rotating shaft.

[0004] Regarding the aforementioned technologies, during bending, the feeder assembly located at one end of the frame straightens the tubing on the coil and feeds it into the heating assembly for softening. To achieve a balance between the softening effect and the heating speed, the heating cylinder in the heating assembly is usually set to be relatively long. When processing reaches the tail section of the coil, the feeder assembly feeds the tail section into the heating cylinder, at which point the tubing loses its forward momentum. This requires the tubing in the heating cylinder to be manually removed and scrapped, resulting in material waste and additional labor input. Summary of the Invention

[0005] In order to reduce labor input and reduce waste of pipe fitting materials, this application provides a pipe bending machine.

[0006] The pipe bending machine provided in this application adopts the following technical solution: A pipe bending machine, including A body assembly, on which a heating assembly is connected, the heating assembly being used to heat pipe components; A feeding assembly is mounted on the machine body assembly and is located at the feed end of the heating assembly for feeding materials into the heating assembly; A bending assembly is mounted on the machine body assembly and is located at the discharge end of the heating assembly. It is used to bend the pipe and to clamp and release the pipe. A telescopic assembly, one end of which is connected to the body assembly and the other end of which is connected to the bending assembly, is used to drive the bending assembly to move toward or away from the heating assembly.

[0007] By adopting the above technical solution, after the pipe material on the coil separates from the coil and enters the heating assembly for heating and softening, the pipe loses the conveying power from the rear feeding assembly. At this time, the bending assembly clamps the pipe, and then the telescopic assembly drives the bending assembly to move, which in turn drives the pipe to move until the pipe is pulled out to the target length. Then, the telescopic assembly drives the bending assembly to retract to the preset bending position of the pipe, and the bending assembly completes the pipe bending process. The above steps are repeated until all the pipe in the heating cylinder is extracted. Processing is straightforward; the designed pipe bending machine, through its main body assembly, provides a convenient installation foundation for the feeding assembly, heating assembly, bending assembly, and telescopic assembly. The feeding assembly facilitates feeding material into the heating assembly, which in turn softens the pipe for subsequent bending. The bending assembly facilitates pipe bending, clamping, or release. Furthermore, in conjunction with the telescopic assembly, it allows for the extraction of tail material from the heating cylinder, reducing waste of pipe tail material, lowering labor costs, and mitigating the potential risk of burns from manual material handling.

[0008] In one specific implementation, the heating assembly includes The heating section is hollow and horizontally connected to the machine body assembly. The heating section is coaxially connected end to end to form a heating cylinder, and the end wall of the heating section is provided with a feeding hole for the pipe to pass through. Multiple guide baffles are provided, which are connected to the inner cavity of the heating section. The guide baffles divide the inner cavity of the heating section into a reflux zone and a heating zone. The pipe passes through the heating zone, and gaps are provided between both ends of the guide baffles and the end wall of the heating section to enable communication between the reflux zone and the heating zone. Multiple hot air units are mounted on the body assembly and are connected to the recirculation zone to circulate hot air between the recirculation zone and the heating zone.

[0009] By adopting the above technical solution, the pipe is fed into the heating cylinder composed of multiple heating sections through the feeding assembly. The hot air unit inputs high-temperature hot air into the recirculation zone. The high-temperature hot air first flows into the heating zone through the recirculation zone to heat and soften the pipe. Then, the hot air flows back from the heating zone to the recirculation zone, is heated by the hot air unit again, and is sent back into the recirculation zone. This cycle is repeated to form a heating cycle. The above structure makes the high-temperature hot air form a T-shaped circulation in the heating section, thereby achieving continuous high-temperature heating of the pipe. Heating the pipe to softening time through the T-shaped circulation of the hot air unit only takes about 10 seconds, which helps to significantly improve the heating efficiency of the pipe and thus improve the pipe bending efficiency. In actual use, an appropriate number of heating sections can be selected for series splicing according to the heating needs of production. The more heating sections there are, the higher the heating efficiency of the pipe, while maintaining a good heating effect.

[0010] In one specific implementation, a clamping unit is also included, the clamping unit comprising: Two clamping plates are slidably connected to the discharge end of the heating cylinder, and the clamping plates have clamping half holes on the side near the pipe. The two clamping plates are located on opposite sides of the pipe, and the two clamping half holes form clamping holes for the pipe to pass through. A clamping drive assembly is mounted on a heating cylinder and is used to connect with the clamping plates to change the distance between the two clamping plates. The clamping drive assembly is offset from the bending assembly.

[0011] By adopting the above technical solution, after the pipe material on the coil is separated from the coil and enters the heating assembly for heating and softening, the pipe loses the conveying power of the rear feeding assembly. At this time, the bending assembly clamps the pipe. Then, the telescopic assembly drives the bending assembly to move, and the bending assembly drives the pipe to move until the pipe is pulled out to the target length. At this time, the clamping drive assembly drives the two clamping plates to move closer to each other until the two clamping plates clamp and fix the pipe. Then, the telescopic assembly drives the bending assembly to retract to the preset bending processing position of the pipe. The bending assembly works to complete the pipe bending processing. The above steps are repeated until the pipe in the heating cylinder is completely extracted for processing. The designed clamping unit, through the clamping drive assembly, facilitates the driving of the two clamping plates to move closer or further apart, thereby achieving clamping and fixing of the pipe. The clamping and fixing of the pipe is achieved during the retraction of the bending wheel body, avoiding uncontrollable swaying of the pipe due to the weight of the bent part, thus improving the processing quality of the pipe product.

[0012] In one specific implementation, the clamping drive assembly includes Two hinged push rods are rotatably connected to the heating cylinder. One end of each hinged push rod abuts against the side of the clamping plate away from the pipe, and a spring is provided between the clamping plate and the side wall of the sliding cavity. The T-shaped tie rod has a horizontal section that simultaneously abuts against one end of both hinged push rods, and a vertical section that is slidably connected to the heating cylinder. Multiple transmission levers are rotatably connected to the heating cylinder. The multiple transmission levers are arranged along the axial direction of the heating cylinder, and the ends of two adjacent transmission levers abut against each other. One end of the transmission lever near the bending assembly is hinged to the vertical section of the T-shaped tie rod. A clamping drive cylinder is connected to one end of the transmission lever away from the bending assembly, and the piston rod of the clamping drive cylinder abuts against the outer wall of the heating cylinder.

[0013] By adopting the above technical solution, when it is necessary to clamp and fix the pipe, the piston rod of the clamping drive cylinder extends and abuts against the outer wall of the heating cylinder. The cylinder body of the clamping drive cylinder drives the T-shaped pull rod to move through a transmission structure composed of multiple transmission levers. The T-shaped pull rod simultaneously drives the two hinged push rods to rotate, thereby causing the clamping plate to move towards the pipe side against the tension of the spring until the pipe is clamped and fixed. The designed clamping drive assembly facilitates the movement of the transmission structure composed of multiple transmission levers through the clamping drive cylinder. Thus, under the premise of being staggered from the pipe bending unit structure, the movement of the T-shaped pull rod is realized. Through the cooperation of the T-shaped pull rod, the hinged push rod and the spring, the two clamping plates can be moved closer or further apart, thereby realizing the clamping, fixing or releasing of the pipe.

[0014] In one specific implementation, the clamping unit further includes An annular sealing cylinder is coaxially connected to the heating cylinder, and the vertical section of the T-shaped tie rod extends out and is slidably connected to the annular sealing cylinder; A sealing cover plate is detachably and fixedly connected to the annular sealing cylinder, and the sealing cover plate is slidably connected to the clamping plate on the side away from the heating cylinder. The sealing cover plate has a through hole for the pipe to pass through.

[0015] By adopting the above technical solution, the annular sealing cylinder can be used in conjunction with the sealing cover plate to reduce the impact of dust in the environment on the quality of the heated and softened pipe. At the same time, it can also form a relatively sealed environment, reducing heat exchange between the pipe and the ambient air, thereby maximizing the pipe's resistance to thermal deformation during bending.

[0016] In one specific implementation, the bending assembly includes The mounting plate has two bending wheel bodies slidably connected to it. The sliding axes of the two bending wheel bodies are collinear, and the bending wheel bodies have semi-grooves. The semi-grooves on the two bending wheel bodies form a pipeline groove, through which the pipeline passes and extends into the pipeline groove. A control unit is mounted on the mounting plate and is simultaneously connected to both of the bending wheel bodies, for controlling the two bending wheel bodies to face each other or move away from each other; A bending unit is disposed below the bending wheel body, and the bending unit is used to make the pipe wrap around and fit into the pipeline groove; A cooling unit is connected to the mounting plate and is used to blow cold air to the bends in the pipe. A cutting unit is disposed on the mounting plate and is used to cut off the pipe.

[0017] By adopting the above technical solution, after the pipe material on the coil is separated from the coil and enters the heating assembly for heating and softening, the pipe loses the conveying power of the rear feeding assembly. At this time, the control unit drives the two bending wheel bodies to move towards each other, reducing the width of the pipeline groove. The two bending wheel bodies clamp the pipe by moving towards each other. Then, the telescopic assembly drives the bending assembly to move, and the bending assembly drives the pipe to move until the pipe is pulled out to the target length. At this time, the clamping drive assembly drives the two clamping plates to move closer to each other until the two clamping plates clamp and fix the pipe. Then, the bending wheel body stops clamping the pipe, and the telescopic assembly drives the bending assembly to retract to the preset bending processing position of the pipe. Then, the bending unit works, so that the pipe wraps around and fits against the inner wall of the pipeline groove, causing the pipe to bend. Then, the cooling unit cools and shapes the pipe bend. After the bending processing of this product is completed, the cutting unit cuts the pipe, completing the pipe bending process. Repeat the above steps until all the pipes inside the heating cylinder are extracted for processing. The designed bending assembly provides installation positions for the bending wheel body, control unit, cooling unit, and cutting unit through the mounting plate. The control unit facilitates the movement of the two bending wheel bodies towards or away from each other, thereby cooperating with the bending wheel body itself to realize the change of the groove width of the pipeline. It realizes the release and clamping of the pipeline at different stages of bending, and finally controls the size of the channel opening at the pipeline bend to ensure the quality of the bent pipeline. At the same time, it can also realize the clamping and fixing of the pipeline, and prevent the pipeline from sagging due to its own weight during the rear feeding process, which would greatly increase the difficulty of bending processing. The bending unit facilitates bending the pipeline in conjunction with the bending wheel body. The cooling unit facilitates the rapid cooling of the softened pipeline, reducing the possibility of deformation of the pipeline after bending due to gravity or external forces from the next bend. The cutting unit facilitates the cutting between two adjacent pipeline products.

[0018] In one specific implementation, the control unit includes A finger cylinder is located on one side of the bending wheel body and is connected to the mounting plate; Multiple linear slide rails are provided, which are connected to the mounting plate. The multiple linear slide rails are arranged along their own width. Two sliders are slidably connected to each linear slide rail. The two sliders are respectively connected to the two bending wheel bodies. The sliding direction of the sliders is consistent with the axial direction of the bending wheel body. The two sliders on the linear slide rail near the finger cylinder are respectively hinged to the two output ends of the finger cylinder.

[0019] By adopting the above technical solution, the designed control unit uses a finger cylinder to easily drive two sliders located near the finger cylinder to slide on a linear slide rail, thereby moving them closer or further apart. This, in turn, drives the two bending wheel bodies to move, achieving clamping and squeezing actions on the pipe.

[0020] In one specific implementation, the cutting unit includes A cutter, wherein a sliding gap is provided between the cutter and the mounting plate, and the cutter is disposed between the mounting plate and the bending wheel body; A cut-off drive cylinder is connected to the mounting plate, and the piston rod of the cut-off drive cylinder is connected to the cutter, for driving the cutter to move toward the pipe.

[0021] By adopting the above technical solution, the designed cutting unit uses a cutting drive cylinder to easily move the cutter toward or away from the pipe, thereby allowing the pipe to pass through the mounting plate or completing the pipe cutting work. The cutter facilitates the cutting of the pipe, realizing the separation between two pipe products. However, by placing the cutter between the mounting plate and the bending wheel body, compared to placing the cutter on the side of the mounting plate away from the bending wheel body, when the length of the pipe tail is less than the thickness of the mounting plate, the pipe product cannot be cut completely and further separate cutting is required, making the pipe bending process more complicated and costly.

[0022] In one specific implementation scheme, the body assembly includes The frame, on which both the heating assembly and the telescopic assembly are mounted; A base plate is connected to the frame, and a rotating disk is rotatably connected to the base plate. The rotating disk is coaxial with and offset from the heating cylinder. A rotating unit is connected to the base plate and is connected to the rotating disk to drive the rotating disk to rotate.

[0023] By adopting the above technical solution, the machine body assembly is designed so that the heating assembly and telescopic assembly can be easily installed through the frame, and the base plate can provide an installation foundation for the rotating disk, rotating unit and telescopic assembly. Through the cooperation of the rotating unit and rotating disk, the relative position of the bending assembly and the pipeline in the circumferential direction can be changed through the telescopic assembly, thereby realizing the processing of complex pipeline bending shapes.

[0024] In one specific implementation, the telescopic assembly includes A fixing bar, wherein the number of fixing bars is at least one, and the fixing bar is connected to the rotating disk; The sliding bar, the number of which is at least one, is slidably connected to the fixed bar, and the end of the sliding bar away from the rotating disk is connected to the mounting plate; A telescopic cylinder, wherein the cylinder body of the telescopic cylinder is connected to the mounting plate, the piston rod of the telescopic cylinder is connected to the rotating disk, and the axial direction of the piston rod of the telescopic cylinder and the sliding direction of the sliding strip are both consistent with the axial direction of the heating cylinder.

[0025] By adopting the above technical solution, after the two bending wheel bodies approach each other to clamp and fix the pipe, the piston rod of the telescopic cylinder extends, causing the sliding strip to slide on the fixed strip. While the sliding strip slides, it drives the mounting plate to move, realizing the pulling of the pipe and the retraction of the bending wheel body. The designed telescopic assembly, through the cooperation of the telescopic cylinder, the sliding strip and the fixed strip, can realize the movement of the bending wheel body toward or away from the heating cylinder, thereby completing the pulling of the pipe and the position adjustment of the bending wheel body.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The designed pipe bending machine provides an installation foundation for the feeding assembly, heating assembly, bending assembly, and telescopic assembly through the machine body assembly. The feeding assembly facilitates feeding material into the heating assembly, which in turn facilitates heating and softening the pipe for subsequent bending. The bending assembly facilitates bending processing and clamping or releasing the pipe. Furthermore, in conjunction with the telescopic assembly, it can extract the tail material pipe in the heating cylinder, reducing waste of pipe tail material, lowering labor input costs, and reducing the potential risk of burns from manual material handling.

[0027] 2. The designed pipe bending machine uses a clamping drive assembly to easily drive two clamping plates closer or further apart, thereby clamping and fixing the pipe. The pipe is clamped and fixed during the retraction of the bending wheel body, preventing uncontrollable swaying of the pipe due to the weight of the bent section, thus improving the processing quality of the pipe products.

[0028] 3. The designed pipe bending machine uses a cutting drive cylinder to facilitate the movement of the cutter toward or away from the pipe, thereby allowing the pipe to pass over the mounting plate or to complete the pipe cutting work. The cutter facilitates the cutting of the pipe and achieves the separation of two pipe products. However, placing the cutter between the mounting plate and the bending wheel body is more advantageous than placing the cutter on the side of the mounting plate away from the bending wheel body. When the length of the pipe tail is less than the thickness of the mounting plate, the pipe product cannot be cut completely and further separate cutting is required. This makes the pipe bending process more complex and costly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the pipe bending machine according to an embodiment of this application.

[0030] Figure 2 yes Figure 1 A sectional view.

[0031] Figure 3 yes Figure 1 A schematic diagram of the heating assembly.

[0032] Figure 4 yes Figure 1 A schematic diagram of the middle bending assembly.

[0033] Figure 5 yes Figure 4 A structural diagram of the mounting plate and the main body of the bending wheel.

[0034] Figure 6 yes Figure 5 A schematic diagram of the structure after the addition of the control unit.

[0035] Figure 7 yes Figure 6 A partial structural diagram.

[0036] Figure 8 yes Figure 4 A partial structural diagram.

[0037] Figure 9 yes Figure 8 A partial structural diagram.

[0038] Explanation of reference numerals in the attached drawings: 1. Machine body assembly; 11. Frame; 12. Base plate; 13. Rotating disk; 14. Rotating unit; 141. Rotary servo motor; 142. Drive wheel; 143. Transmission belt; 2. Heating assembly; 21. Heating section; 22. Guide partition; 23. Hot air unit; 231. Hot air blower; 232. Air inlet pipe; 233. Air return pipe; 234. Square tube; 235. Auxiliary heating wire; 236. Protective box; 24. Heat insulation plate; 3. Feeding assembly; 4. Bending assembly; 41. Mounting plate; 42. Bending wheel body; 421. Semi-groove; 43. Control unit; 431. Finger cylinder; 432. Linear slide rail; 433. Slider; 44. Bending unit; 441. Bending rod; 442. Bending drive assembly; 4421. Receiving box; 4422. Bending servo motor; 4423. Right angle reducer; 4424. Lower flange of coupling; 4425. Main bending wheel shaft; 4426. Connecting block; 45. Cooling unit; 451. Air supply rod; 452. Air outlet rod; 46. Cutting unit; 461. Cutter; 462. Cutting drive cylinder; 5. Telescopic assembly; 51. Fixing strip; 52. Sliding strip; 53. Telescopic cylinder; 6. Clamping unit; 61. Clamping plate; 611. Clamping half hole; 62. Clamping drive assembly; 621. Hinge push rod; 622. T-shaped pull rod; 623. Transmission lever; 624. Clamping drive cylinder; 63. Annular sealing cylinder; 64. Sealing cover plate. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0040] This application discloses a pipe bending machine.

[0041] Reference Figure 1 and Figure 2 A pipe bending machine includes a body assembly 1, a heating assembly 2, a feeding assembly 3, a bending assembly 4, and a telescopic assembly 5. The heating assembly 2 is installed on the body assembly 1 and is used to heat and soften the pipe. The feeding assembly 3 is located at the feed end of the heating assembly 2 and is connected to the body assembly 1. It is used to feed material into the heating assembly 2. The bending assembly 4 is installed on the side of the heating assembly 2 away from the feeding assembly 3 and is connected to the body assembly 1. It is used to bend the pipe and to clamp and release the pipe. One end of the telescopic assembly 5 is connected to the body assembly 1, and the other end is connected to the bending assembly 4. It is used to change the distance between the bending assembly 4 and the heating assembly 2.

[0042] Reference Figure 3The heating assembly 2 includes a heating section 21, a guide partition 22, and a hot air unit 23. In this application, the number of heating sections 21, guide partitions 22, and hot air units 23 is the same. In this embodiment, the number of heating sections 21 is two. The two heating sections 21 are hollow. The end wall of the heating section 21 is provided with a feeding hole for the pipe to pass through. The two heating sections 21 are coaxially welded and fixed to form a heating cylinder. The heating cylinder is horizontally welded to the machine body assembly 1, and the end of the heating cylinder away from the feeding assembly 3 extends out of the machine body assembly 1.

[0043] Reference Figure 3 The guide baffle 22 is welded and fixed to the inner cavity of the heating section 21, and the guide baffle 22 divides the inner cavity of the heating section 21 into a reflux zone and a heating zone. Pipes pass through the heating zone, and gaps for hot air passage are provided between the guide baffle 22 and the two end walls of the heating section 21 to achieve communication between the reflux zone and the heating zone. To facilitate heat preservation, two heat insulation plates 24 are welded inside the heating section 21, and the two heat insulation plates 24 are respectively located on both sides of the guide baffle 22. Reference Figure 3 The hot air unit 23 is installed on the body assembly 1 and is connected to the recirculation zone located below the guide partition 22 and above the heat insulation plate 24. It is used to circulate hot air between the recirculation zone and the heating zone. The heat insulation plate 24 located below the guide partition 22 has an air inlet and an air outlet. The hot air unit 23 includes a hot air blower 231, an air inlet pipe 232, a return air pipe 233 and a square pipe 234. There are two square pipes 234. One end of the air inlet pipe 232 is fixedly connected to the output end of the hot air blower 231, and the other end is connected to the air inlet at the bottom of the heating cylinder through the square pipe 234. One end of the return air pipe 233 is connected to the return air outlet at the bottom of the heating cylinder through the square pipe 234, and the other end is connected to the input end of the hot air blower 231. During heating, high-temperature hot air is introduced into the air inlet pipe 232 through the hot air blower 231. The high-temperature hot air passes through the air inlet pipe 232, square pipe 234, heating zone, return zone, square pipe 234 and return air pipe 233 in sequence, thereby forming a continuous circulation heating of the pipes in the heating zone.

[0044] Reference Figure 3 , refer to Figure 1 An auxiliary heating wire 235 is installed inside the square tube 234. A protective box 236 is installed outside the two square tubes 234. The gap between the protective box 236 and the square tube 234 is filled with heat insulation material, which can be glass wool or rock wool. In order to facilitate the transportation of the pipeline, a guide spring is also welded inside the heating cylinder, and the pipeline passes through the guide spring.

[0045] Reference Figure 4The machine assembly 1 includes a frame 11, a base plate 12, a rotating disk 13, and a rotating unit 14. The heating cylinder and the feeding assembly 3 are both mounted on the frame 11. The base plate 12 is bolted to the end of the frame 11 away from the feeding assembly 3. The rotating disk 13 is rotatably connected to the end of the base plate 12 away from the feeding assembly 3. Both the base plate 12 and the rotating disk 13 have through holes for pipes to pass through. The rotating disk 13 and the pipe are coaxially arranged.

[0046] Reference Figure 4 The rotating unit 14 includes a rotary servo motor 141, a drive wheel 142, and a transmission belt 143. The base of the rotary servo motor 141 is bolted to the base plate 12 on the side away from the rotating disk 13, and the output shaft of the rotary servo motor 141 is aligned with the axial direction of the rotating disk 13. The drive wheel 142 is coaxially connected to one end of the output shaft of the rotary servo motor 141 that passes through the base plate 12. The transmission belt 143 is simultaneously sleeved on the rotating disk 13 and the drive wheel 142, and the transmission belt 143 achieves transmission with the rotating disk 13 and the drive wheel 142 through friction.

[0047] Reference Figure 4 and Figure 5 To facilitate the extraction and processing of pipe tailings retained in the heating cylinder, the pipe bending machine also includes a bending assembly 4 and a telescopic assembly 5. The bending assembly 4 includes a mounting plate 41, a bending wheel body 42, and a control unit 43. The mounting plate 41 is located on the side of the base plate 12 away from the machine body assembly 1, and the distance between the mounting plate 41 and the rotating disk 13 is controlled by the telescopic assembly 5. There are two bending wheel bodies 42, and the bending wheel bodies 42 are slidably connected to the mounting plate 41. A semi-groove 421 is provided on the bending wheel body 42. The semi-groove 421 is coaxially arranged with the bending wheel body 42. The semi-groove 421 on the two bending wheel bodies 42 cooperate to form a pipeline groove. A through hole is provided on the mounting plate 41. The through hole is connected to one end of the pipeline groove. The heated and softened pipe passes through the through hole and extends into the pipeline groove.

[0048] Reference Figure 5 and Figure 6 The control unit 43 is installed on the mounting plate 41 and is connected to both bending wheel bodies 42. This allows the two bending wheel bodies 42 to move closer to or further away from each other, thereby cooperating with the bending wheel bodies 42 to change the width of the pipeline groove. This releases and compresses the pipeline at different stages of bending, ultimately controlling the size of the channel opening at the pipeline bend and ensuring the quality of the bent pipeline. At the same time, it can also clamp and fix the pipeline, and cooperate with the telescopic assembly 5 to extract the tail material of the pipeline inside the heating cylinder.

[0049] Reference Figure 6 and Figure 7The control unit 43 includes a finger cylinder 431 and a linear slide rail 432. The finger cylinder 431 is located on one side of the bending wheel body 42, and the cylinder body of the finger cylinder 431 is bolted to the mounting plate 41. The linear slide rail 432 is bolted to the mounting plate 41. There are multiple linear slide rails 432, which are distributed along their width direction. Two sliders 433 are slidably connected to the linear slide rail 432. The two sliders 433 are bolted to the two sides of the bending wheel body 42 near the mounting plate 41, and the sliding direction of the sliders 433 is consistent with the axial direction of the bending wheel body 42. The two output ends of the finger cylinder 431 are hinged to the two sliders 433 on the linear slide rail 432 near the finger cylinder 431.

[0050] Reference Figure 6 In this application, the number of linear slide rails 432 can be two, three, or four, as long as it allows the bending wheel body 42 to slide smoothly. In this embodiment, the number of linear slide rails 432 is two. The finger cylinder 431 facilitates the movement of two sliders 433 located near the finger cylinder 431 on the linear slide rails 432 to move closer or further apart, thereby driving the two bending wheel bodies 42 to move and achieve clamping and squeezing action on the pipe. Moreover, compared to the integrated bending wheel and the opening of a pipe groove with a width that gradually decreases on the bending wheel body 42, this method can solve the pipe crease defect caused when the pipe moves to the groove width connection of the semi-groove 421.

[0051] Reference Figure 6 and Figure 7 In order to make the heated and softened pipe wrap around and fit against the inner wall of the pipeline groove, the bending assembly 4 also includes a bending unit 44. The bending unit 44 is located below the bending wheel body 42. The bending unit 44 includes a bending rod 441 and a bending drive assembly 442. The bending rod 441 has an arc-shaped groove adapted to the outer diameter of the pipe on the side near the bending wheel body 42. The rotation axis of the bending rod 441 is coaxial with the central axis of the bending wheel body 42. The bending drive assembly 442 is located below the bending rod 441 and is connected to the bending rod 441. It is used to drive the bending rod 441 to rotate and apply force to the pipe through the inner wall of the arc-shaped groove so that the pipe wraps around the inner wall of the pipeline groove, thus completing the bending action.

[0052] Reference Figure 6 and Figure 7The bending drive assembly 442 includes a housing 4421, a bending servo motor 4422, a right-angle reducer 4423, a coupling lower flange 4424, a main bending wheel shaft 4425, and a connecting block 4426. The housing 4421 is connected to the telescopic assembly 5 and is hollow. The bending servo motor 4422 is located in the inner cavity of the housing 4421 and its output shaft is horizontal. The right-angle reducer 4423 is located in the inner cavity of the housing 4421 and its horizontal input shaft is coaxially connected to the output shaft of the bending servo motor 4422.

[0053] Reference Figure 6 and Figure 7 One end of the lower flange 4424 of the coupling is coaxially connected to the vertical output shaft of the right-angle reducer 4423, and the other end is connected to the main bending wheel shaft 4425 through an eccentric coupling. The main bending wheel shaft 4425 is coaxially set with the bending wheel body 42. The connecting block 4426 is bolted to the main bending wheel shaft 4425 and is located below the bending wheel body 42. The lower end of the bending rod 441 is welded and fixed to the connecting block 4426. An external power supply provides power for the bending servo motor 4422. The output shaft of the bending servo motor 4422 changes the direction of torque transmission through the right-angle reducer 4423, causing the lower flange 4424 of the coupling to rotate. Through the lower flange 4424 of the coupling and the eccentric coupling, the main bending wheel shaft 4425 is driven to rotate. While the main bending wheel shaft 4425 rotates, the bending rod 441 is driven to rotate through the connecting block 4426, thus completing the pipe bending action.

[0054] Reference Figure 7 In order to quickly cool the softened pipe and reduce the possibility of deformation caused by gravity or external force from the next bend after the pipe is bent, the bending assembly 4 also includes a cooling unit 45. The cooling unit 45 is connected to the mounting plate 41, and the air outlet of the cooling unit 45 is set towards the bend of the pipe to cool the pipe after the bend is completed.

[0055] Reference Figure 7 The cooling unit 45 includes an air supply rod 451 and an air outlet rod 452. Both the air supply rod 451 and the air outlet rod 452 are connected to the mounting plate 41 and are hollow inside. One end of the air supply rod 451 is used to communicate with a cold air source, and the other end is connected to the air outlet rod 452. The air outlet rod 452 has multiple air outlet holes facing the bend of the pipe. In order to improve the cooling effect and cooling speed, the air outlet rod 452 is coaxially arranged with the bending wheel body 42. In this application, the end of the air supply rod 451 away from the air outlet rod 452 can be directly connected to the cold air outlet of the air refrigeration equipment, or it can be connected to the cold air outlet of the vortex tube for hot and cold gas diversion. As long as cold air can be input into the air supply rod 451, it is acceptable. In this embodiment, a vortex tube structure is selected.

[0056] Reference Figure 7 In order to cut off the current pipe product and the pipe after the current pipe product is bent, the bending assembly 4 also includes a cutting unit 46, which is disposed on the mounting plate 41 and is used to cut off the pipe.

[0057] Reference Figure 7 The cutting unit 46 includes a cutter 461 and a cutting drive cylinder 462. The cylinder body of the cutting drive cylinder 462 is bolted to the mounting plate 41, and the piston rod of the cutting drive cylinder 462 is welded to the cutter 461. The cutting drive cylinder 462 is located above the cutter 461 and is used to drive the cutter 461 to move toward the pipe. There is a sliding gap between the cutter 461 and the mounting plate 41. The cutter 461 can be located on the side of the mounting plate 41 away from the bending wheel body 42, or it can be located on the side of the mounting plate 41 closer to the bending wheel body 42. In this application, the cutter 461 is set between the mounting plate 41 and the bending wheel body 42. Compared with setting the cutter 461 on the side of the mounting plate 41 away from the bending wheel body 42, when the length of the pipe tail is less than the thickness of the mounting plate 41, the pipe product cannot be cut and further separate cutting is required, which makes the pipe bending process more complicated and more expensive.

[0058] Reference Figure 8 The telescopic assembly 5 is connected at one end to the mounting plate 41 and at the other end to the rotating disk 13, and is used to drive the mounting plate 41 toward or away from the heating cylinder. The telescopic assembly 5 includes a fixing strip 51, a sliding strip 52 and a telescopic cylinder 53. The number of fixing strips 51 and sliding strips 52 is the same, and the number of fixing strips 51 is at least one. In this application, the fixing strip 51 can be one, two or three. In order to achieve stable operation of the mounting plate 41, the number of fixing strips 51 is two. The two fixing strips 51 are respectively set on opposite sides of the mounting plate 41. One end of the fixing strip 51 is welded to the rotating disk 13, and reinforcing ribs are welded between the fixing strip 51 and the rotating disk 13 and between the sliding strip 52 and the mounting plate 41.

[0059] Reference Figure 8 The sliding strip 52 is slidably connected to the fixed strip 51, and one end of the sliding strip 52 away from the rotating disk 13 is welded and fixed to the mounting plate 41, while the other end of the sliding strip 52 away from the rotating disk 13 is bolted to the receiving box 4421. The cylinder body of the telescopic cylinder 53 is bolted to the mounting plate 41, and the piston rod of the telescopic cylinder 53 is bolted to the rotating disk 13. The axial direction of the piston rod of the telescopic cylinder 53 and the sliding direction of the sliding strip 52 are both consistent with the axial direction of the heating cylinder. When the piston rod of the telescopic cylinder 53 extends, the sliding strip 52 slides on the fixed strip 51. While the sliding strip 52 slides, it drives the mounting plate 41 to move. Through the mounting plate 41, the bending wheel body 42 moves towards the end away from the heating cylinder until the pipe is pulled out to the target length.

[0060] Reference Figure 8 and Figure 9 After the bending wheel body 42, together with the telescopic assembly 5, pulls the pipe out of the heating cylinder into place, the bending wheel body 42 needs to retract to the bending area of ​​the pipe. At this time, the pipe loses the clamping and fixing of the external force and will swing, which will greatly affect the pipe processing quality and the difficulty of equipment programming. Therefore, the pipe bending machine also includes a clamping unit 6, which is set between the mounting plate 41 and the rotating disk 13, and the clamping unit 6 is used to clamp and fix the pipe.

[0061] Reference Figure 9 The clamping unit 6 includes a clamping drive assembly 62 and two clamping plates 61. The clamping plates 61 are located between the bending wheel body 42 and the heating cylinder. The clamping plates 61 have a clamping half hole 611 on the side near the pipe. The two clamping plates 61 are respectively arranged on opposite sides of the pipe, and the two clamping half holes 611 form a clamping hole for the pipe to pass through.

[0062] Reference Figure 9 During the process from when the pipe is pulled out of the heating cylinder until it is bent, its temperature will drop due to the influence of the ambient temperature and the cooling gas at the front bend. After the pipe is bent, it will be difficult to pass the heat deformation test, resulting in product failure. This temperature drop is especially significant when the distance between the two bends on the pipe is close. In order to greatly shorten the dead zone of pipe heating and softening and greatly improve the heat deformation resistance of the pipe bend, a sliding cavity is provided on the heating cylinder for the clamping plate 61 to slide. The clamping plate 61 is slidably connected to the heating cylinder.

[0063] Reference Figure 9 The clamping drive assembly 62 is mounted on the heating cylinder and is used to connect with the clamping plate 61 to change the distance between the two clamping plates 61. The clamping drive assembly 62 includes a hinged push rod 621, a T-shaped pull rod 622, a transmission lever 623, and a clamping drive cylinder 624. There are two hinged push rods 621. The clamping plate 61 is located between the two hinged push rods 621. The hinged push rod 621 is rotatably connected to the heating cylinder, and the rotation axis of the hinged push rod 621 is consistent with the axis of the heating cylinder. One end of the hinged push rod 621 abuts against the side of the clamping plate 61 away from the pipe. A spring is provided between the clamping plate 61 and the side wall of the sliding cavity. The two ends of the spring are welded and fixed to the side wall of the clamping plate 61 and the side wall of the sliding cavity, respectively.

[0064] Reference Figure 9The horizontal section of the T-shaped pull rod 622 simultaneously abuts against one end of two hinged push rods 621, and the vertical section of the T-shaped pull rod 622 is slidably connected to the heating cylinder. There are multiple transmission levers 623. In this application, the number of transmission levers 623 can be two, three, or four, as long as the T-shaped pull rod 622 can be moved to make way for the bending unit 44. In this embodiment, there are two transmission levers 623. The transmission levers 623 are rotatably connected to the heating cylinder, and the rotation axis of the transmission levers 623 is set horizontally and perpendicular to the axis of the heating cylinder. The two transmission levers 623 are set along the axis of the heating cylinder, and the two adjacent transmission levers 623 abut against each other end to end. One end of the transmission lever 623 near the bending wheel body 42 is hinged to the vertical section of the T-shaped pull rod 622.

[0065] Reference Figure 9 The clamping drive cylinder 624 is located at the end of the transmission lever 623 away from the bending wheel body 42. The cylinder body of the clamping drive cylinder 624 is connected to the end of the transmission lever 623 away from the bending wheel body 42, and the piston rod of the clamping drive cylinder 624 is used to abut against the outer wall of the heating cylinder.

[0066] Reference Figure 9 To further shorten the heat exchange between the outside air and the pipe at the clamping plate 61, and to reduce the impact of environmental dust on the pipe, the clamping unit 6 also includes an annular sealing cylinder 63 and a sealing cover plate 64. The annular sealing cylinder 63 is coaxially bonded and fixed to the heating cylinder, and the vertical section of the T-shaped tie rod 622 extends out and is slidably connected to the annular sealing cylinder 63. The sealing cover plate 64 is bolted to the annular sealing cylinder 63, and the sealing cover plate 64 is slidably connected to the side of the clamping plate 61 away from the heating cylinder to improve the sliding stability of the clamping plate 61. The sealing cover plate 64 is provided with a through hole for the pipe to pass through.

[0067] The implementation principle of a pipe bending machine according to an embodiment of this application is as follows: when the pipe material on the coil is separated from the coil and enters the inner cavity of the heating cylinder for heating and softening, the pipe loses the conveying power of the rear feeding assembly 3. At this time, the finger cylinder 431 drives the slider 433 to slide on the linear slide rail 432. The slider 433 drives the bending wheel body 42 to move, so that the two bending wheel bodies 42 move towards each other, thereby clamping the pipe.

[0068] The piston rod of the telescopic cylinder 53 extends, causing the sliding bar 52 to slide on the fixed bar 51. As the sliding bar 52 slides, it drives the mounting plate 41 and the receiving box 4421 to move. The mounting plate 41 drives the bending wheel body 42 to move away from the heating cylinder until the pipe is pulled out to the target length.

[0069] At this time, the piston rod of the clamping drive cylinder 624 extends out and abuts against the outer wall of the heating cylinder. The cylinder body of the clamping drive cylinder 624 drives the T-shaped pull rod 622 to move through the transmission structure composed of multiple transmission levers 623. The T-shaped pull rod 622 simultaneously drives the two hinged push rods 621 to rotate, thereby causing the clamping plate 61 to overcome the tension of the spring and move towards the pipe side until the pipe is clamped and fixed.

[0070] Then, the bending wheel body 42 is retracted through the telescopic assembly 5 until it reaches the preset bending processing position of the pipe. The bending unit 44 works, causing the pipe to wrap around and fit against the inner wall of the pipeline groove, resulting in a bend in the pipe. Subsequently, the control unit 43 drives the two bending wheel bodies 42 to move towards each other, reducing the width of the pipeline groove. While the two bending wheel bodies 42 move towards each other, they squeeze and soften the pipe, making the width of the pipe along the radial direction of the bending wheel body 42 smaller and the thickness along the radial direction of the bending wheel body 42 larger, ensuring the size of the channel opening at the pipe bend. Then, the cooling unit 45 cools and shapes the pipe bend. After the bending processing of this product is completed, the pipe is cut off by the cutting unit 46. The above steps are repeated until all the pipe in the heating cylinder is extracted for processing.

[0071] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe bending machine, characterized in that: include A body assembly (1) is provided, on which a heating assembly (2) is connected, the heating assembly (2) being used to heat pipes; Feeding assembly (3), which is mounted on the machine body assembly (1) and located at the feed end of the heating assembly (2), is used to feed material into the heating assembly (2); Bending assembly (4), which is mounted on the machine body assembly (1) and located at the discharge end of the heating assembly (2), is used to bend the pipe and to clamp and release the pipe; Telescopic assembly (5), one end of which is connected to the body assembly (1) and the other end of which is connected to the bending assembly (4), is used to drive the bending assembly (4) to move toward or away from the heating assembly (2); The bending assembly (4) includes Mounting plate (41), on which two bending wheel bodies (42) are slidably connected. The sliding axes of the two bending wheel bodies (42) are collinear, and a semi-groove (421) is provided on the bending wheel body (42). The semi-groove (421) on the two bending wheel bodies (42) forms a pipeline groove, through which the pipe passes through the mounting plate (41) and extends into the pipeline groove. Control unit (43), the control unit (43) is mounted on the mounting plate (41), and the control unit (43) is simultaneously connected to the two bending wheel bodies (42) for controlling the two bending wheel bodies (42) to face each other or move away from each other; A bending unit (44) is disposed below the bending wheel body (42), and the bending unit (44) is used to make the pipe wrap around and fit into the pipeline groove; Cooling unit (45), the cooling unit (45) is connected to the mounting plate (41), and the cooling unit (45) is used to blow cold air to the bend of the pipe; A cutting unit (46) is disposed on the mounting plate (41) and is used to cut off the pipe.

2. The pipe bending machine according to claim 1, characterized in that: The heating assembly (2) includes Multiple heating sections (21) are hollow and horizontally connected to the machine body assembly (1). The multiple heating sections (21) are coaxially connected end to end to form a heating cylinder, and the end walls of the heating sections (21) are provided with feeding holes for pipes to pass through. Multiple guide baffles (22) are connected to the inner cavity of the heating section (21). The guide baffles (22) divide the inner cavity of the heating section (21) into a reflux zone and a heating zone. The pipe passes through the heating zone. There are gaps between the two ends of the guide baffles (22) and the end wall of the heating section (21) to realize the connection between the reflux zone and the heating zone. Multiple hot air units (23) are mounted on the body assembly (1) and are connected to the recirculation zone to circulate hot air between the recirculation zone and the heating zone.

3. The pipe bending machine according to claim 2, characterized in that: It also includes a clamping unit (6), which includes... Two clamping plates (61) are slidably connected to the discharge end of the heating cylinder, and the clamping plates (61) have clamping half holes (611) on the side near the pipe. The two clamping plates (61) are located on opposite sides of the pipe, and the two clamping half holes (611) form a clamping hole for the pipe to pass through. A clamping drive assembly (62) is mounted on the heating cylinder and is used to connect with the clamping plate (61) to change the distance between the two clamping plates (61). The clamping drive assembly (62) is offset from the bending assembly (4).

4. The pipe bending machine according to claim 3, characterized in that: The clamping drive assembly (62) includes Two hinged push rods (621) are rotatably connected to the heating cylinder. One end of the hinged push rod (621) abuts against the side of the clamping plate (61) away from the pipe, and a spring is provided between the clamping plate (61) and the side wall of the sliding cavity. The T-shaped tie rod (622) has a horizontal section that simultaneously abuts against one end of both hinged push rods (621), and the vertical section of the T-shaped tie rod (622) is slidably connected to the heating cylinder. Multiple transmission levers (623) are rotatably connected to the heating cylinder. The multiple transmission levers (623) are arranged along the axial direction of the heating cylinder, and the ends of two adjacent transmission levers (623) abut against each other. One end of the transmission lever (623) near the bending assembly (4) is hinged to the vertical section of the T-shaped tie rod (622). A clamping drive cylinder (624) is connected to one end of the transmission lever (623) away from the bending assembly (4), and the piston rod of the clamping drive cylinder (624) abuts against the outer wall of the heating cylinder.

5. The pipe bending machine according to claim 4, characterized in that: The clamping unit (6) also includes An annular sealing cylinder (63) is coaxially connected to the heating cylinder, and the vertical section of the T-shaped tie rod (622) extends out and is slidably connected to the annular sealing cylinder (63); A sealing cover plate (64) is detachably and fixedly connected to the annular sealing cylinder (63), and the sealing cover plate (64) is slidably connected to the clamping plate (61) on the side away from the heating cylinder. A through hole for the pipe to pass through is provided on the sealing cover plate (64).

6. The pipe bending machine according to claim 1, characterized in that: The control unit (43) includes Finger cylinder (431), the finger cylinder (431) is located on one side of the bending wheel body (42), and the finger cylinder (431) is connected to the mounting plate (41); Multiple linear slide rails (432) are connected to the mounting plate (41), and the multiple linear slide rails (432) are arranged along their own width direction. Two sliders (433) are slidably connected on the linear slide rails (432). The two sliders (433) are respectively connected to the two bending wheel bodies (42), and the sliding direction of the sliders (433) is consistent with the axial direction of the bending wheel body (42). The two sliders (433) on the linear slide rails (432) near the finger cylinder (431) are respectively hinged to the two output ends of the finger cylinder (431).

7. The pipe bending machine according to claim 1, characterized in that: The cutting unit (46) includes A cutter (461) is provided with a sliding gap between the cutter (461) and the mounting plate (41), and the cutter (461) is disposed between the mounting plate (41) and the bending wheel body (42); A cut-off drive cylinder (462) is connected to the mounting plate (41), and the piston rod of the cut-off drive cylinder (462) is connected to the cutter (461) for driving the cutter (461) to move toward the pipe.

8. The pipe bending machine according to claim 1, characterized in that: The body assembly (1) includes The frame (11) is on which the heating assembly (2) and the telescopic assembly (5) are both mounted; A base plate (12) is connected to the frame (11), and a rotating disk (13) is rotatably connected to the base plate (12). The rotating disk (13) is coaxial with and offset from the heating cylinder. A rotating unit (14) is connected to the base plate (12), and the rotating unit (14) is connected to the rotating disk (13) to drive the rotating disk (13) to rotate.

9. The pipe bending machine according to claim 8, characterized in that: The telescopic assembly (5) includes A fixing strip (51), the number of fixing strips (51) is at least one, and the fixing strip (51) is connected to the rotating disk (13); The sliding bar (52) has at least one number, the sliding bar (52) is slidably connected to the fixed bar (51), and the end of the sliding bar (52) away from the rotating disk (13) is connected to the mounting plate (41); Telescopic cylinder (53), the cylinder body of the telescopic cylinder (53) is connected to the mounting plate (41), the piston rod of the telescopic cylinder (53) is connected to the rotating disk (13), and the axial direction of the piston rod of the telescopic cylinder (53) and the sliding direction of the sliding bar (52) are both consistent with the axial direction of the heating cylinder.

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