A metal pipe continuous bending device

Abstract

The application belongs to the technical field of metal pipe continuous bending, and particularly relates to a metal pipe continuous bending device, which comprises a rack, two groups of transmission shafts are symmetrically installed in the rack, two groups of chain wheels are symmetrically installed on the transmission shafts, two groups of chains are respectively engaged with the two groups of chain wheels, a plurality of groups of pressing and combining modules are arranged around the two groups of chains, a placing groove and a bending groove are formed in the pressing and combining module, the placing groove and the bending groove are in communication with each other, a bending mechanism is arranged on the rack, and the plurality of groups of pressing and combining modules are driven to perform circular motion, so that each group of pressing and combining modules can pass through a feeding point and the bending mechanism in sequence. In the process of bending the metal pipe, workers can simultaneously feed and discharge, the feeding and discharging time is saved, the metal pipe can be continuously bent, and the bending efficiency of the metal pipe is improved.

Description

Technical Field

[0001] This invention belongs to the field of continuous bending technology for metal tubes, specifically a continuous bending device for metal tubes. Background Technology

[0002] Metal pipe bending is the process of "bending" a straight pipe into a two-dimensional or three-dimensional curve according to drawings or tooling, while ensuring that the cross-section does not collapse, wrinkle, or crack. It is both a "forming" and a "quality control" process, requiring the shape to be accurate while maintaining the internal diameter, surface quality, and strength. Metal pipe bending equipment typically includes manual pipe bending machines and CNC pipe bending machines.

[0003] Patent CN222607794U discloses a metal tube bending and positioning device, including a base, a fixed platform, and a positioning platform. The fixed platform is welded to the base, and the positioning platform is fixedly installed on the fixed platform. The positioning platform has a placement groove for placing the metal tube and a bending groove for bending the metal tube. The bending groove is connected to the placement groove. This solution involves placing the metal tube on the placement groove, operating a hydraulic cylinder, and using a hydraulic rod to push a fixed frame to move vertically downward. The fixed frame then pushes a pressure block to move vertically downward, pressing the metal tube downward. The metal tube bends along the bending groove on the positioning platform, thus achieving the bending process of the metal tube and improving bending efficiency.

[0004] In the above-mentioned solution, the device can only place one metal tube at a time, so only one metal tube can be bent at a time. When bending the next metal tube, the previous set of bent metal tubes needs to be removed before the next metal tube can be placed for bending. The large amount of time wasted in picking up and putting down the metal tubes reduces the bending efficiency of the metal tubes. Therefore, the present invention provides a continuous bending device for metal tubes. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a continuous bending device for metal tubes, including a frame, two sets of transmission shafts symmetrically and rotatably mounted inside the frame, two sets of sprockets symmetrically mounted on the transmission shafts, the two sets of sprockets respectively meshing with two sets of chains, a plurality of pressing modules arranged around the two sets of chains, the pressing modules having placement grooves and bending grooves, the placement grooves and bending grooves being interconnected, a bending mechanism being provided on the frame, the bending mechanism including a support frame, the support frame being fixedly mounted on the frame, a cylinder fixedly mounted on the support frame, a bracket mounted on the output end of the cylinder, a pressure roller fixedly mounted on the bracket, and two sets of support platforms symmetrically arranged inside the frame, the support platforms being used to support the pressing modules;

[0007] By driving several sets of pressing modules to perform circular motion, each set of pressing modules can pass through the loading point and bending mechanism in sequence. During the bending process of the metal tube, the operator can simultaneously load and unload the metal tube, saving loading and unloading time. This enables continuous bending of the metal tube and improves the bending efficiency of the metal tube.

[0008] Preferably, the pressing module includes a module body, two sets of chains fixedly connected to both sides of the module body, two sets of movable modules symmetrically and movably installed inside the module body, a pressing block fixedly connected to the movable modules, a placement groove and a bending groove both opened on the pressing block, two sets of support plates fixedly installed on the movable modules, a lifting plate movably installed between the two sets of support plates, two sets of guide posts slidably connected to the lifting plate, the guide posts fixedly installed inside the module body, springs sleeved on the guide posts, a pressure rod fixedly connected to the lifting plate, a pin shaft provided between one end of the two sets of support plates, two sets of first inclined grooves symmetrically opened on the lifting plate, the pin shaft located in the first inclined groove, a roller rotatably installed at the end of the pressure rod, a guide plate provided between the two sets of transmission shafts, the guide plate rotatably connected to the transmission shaft, the rollers rollingly connected to the outer ring of the guide plate, the outer ring of the guide plate consisting of a first outer ring, a second outer ring and an inclined surface, and a conveyor belt mechanism for conveying workpieces provided below the frame;

[0009] The patent with the aforementioned publication number CNU discloses a metal tube bending and positioning device that uses a pushing method to unload U-shaped workpieces. Because the force of the U-shaped workpiece being engaged in the bending groove is relatively large, the friction between the U-shaped workpiece and the bending groove is relatively large, and the pushing generates a large resistance, which can easily cause the U-shaped workpiece to deform. This solution separates the two sets of pressing blocks, allowing the U-shaped workpiece to be released directly from between the two sets of pressing blocks, thus achieving unloading of the U-shaped workpiece while ensuring that it does not deform.

[0010] Preferably, the movable module includes a movable block, the other end of the support plate is fixedly connected to the movable block, two sets of sliders are symmetrically slidably installed in the movable block, a connecting block is fixedly installed on the slider, the pressing block is formed by combining two sets of assembly blocks, one end of the connecting block is fixedly connected to the assembly block, four sets of second inclined grooves are opened on the module body, the connecting block passes through the second inclined grooves, guide grooves are symmetrically opened at both ends of the movable block, the guide grooves are slidably connected to the guide rails, the guide rails are fixedly installed in the module body, a rectangular groove is opened on the movable block, a slide rod is fixedly installed in the rectangular groove, the slider is slidably connected to the slide rod, and two sets of limit strips are symmetrically installed on the conveyor belt mechanism, with a gap between the two sets of limit strips;

[0011] The distance between the two sets of assembly blocks after separation is much larger than the outer diameter of the stainless steel. The conveyor belt mechanism performs synchronous transmission with the circular motion of several sets of pressing modules. The conveyor belt mechanism drives the U-shaped workpiece to move along the gap between the two sets of limit strips. This will cause the U-shaped workpiece to gradually separate from the two sets of assembly blocks, so that the U-shaped workpiece is evenly and neatly distributed on the conveyor belt mechanism, which will facilitate the subsequent development of related equipment to collect and sort the U-shaped workpiece.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. By driving several sets of pressing modules to perform circular motion, each set of pressing modules can pass through the loading point and bending mechanism in sequence. During the bending process of the metal tube, the operator can simultaneously load and unload the metal tube, saving loading and unloading time. This enables continuous bending of the metal tube and improves the bending efficiency of the metal tube.

[0014] 2. After the metal tube is bent into a U-shaped workpiece, several sets of pressing modules continue to move in a circular motion. At this time, the spring is in a compressed state, and the two sets of pressing blocks are in a combined state. The rollers on the pressing modules first roll along the first outer ring until the rollers are located at the intersection of the first and second outer rings. The U-shaped workpiece, along with the corresponding pressing module, is located above the conveyor belt mechanism. Under the rebound force of the spring, the lifting plate moves downward along the two sets of guide posts until the rollers reach the second outer ring. At the same time, the two sets of pins move along the two sets of first inclined... The groove slides, and under the guidance of the first inclined groove, the pin drives the support plate, along with the movable module and the pressing block, to move together. The two sets of pressing blocks will separate and move in opposite directions. Under the action of gravity, the U-shaped workpiece pressed between the two sets of pressing blocks will automatically fall onto the conveyor belt mechanism below. The conveyor belt mechanism will then transport the U-shaped workpiece to the next process. As the roller rolls along the second outer ring, the roller will be pushed by the inclined surface until the roller rolls onto the first outer ring, causing the two sets of pressing blocks to merge again, thus realizing the automatic unloading of the U-shaped workpiece.

[0015] 3. Under the rebound force of the spring, when the two sets of movable modules move in opposite directions, the movable blocks on the movable modules slide along the guide rail. The movable blocks drive the two sets of sliders, along with the two sets of connecting blocks and the two sets of assembly blocks, to move. This allows the U-shaped workpiece to be released directly from between the two sets of pressing blocks, and the U-shaped workpiece will fall into the gap between the two sets of limiting strips. At the same time, the two sets of connecting blocks slide along the two sets of second inclined grooves. Guided by the second inclined grooves, the two sets of assembly blocks separate. The assembly blocks drive the sliders to slide along the slide rods through the connecting blocks. The distance between the two sets of assembly blocks after separation is much larger than the outer diameter of the stainless steel. The conveyor belt mechanism performs synchronous transmission with the circular motion of several sets of pressing modules. The conveyor belt mechanism drives the U-shaped workpiece to move along the gap between the two sets of limiting strips. This will cause the U-shaped workpiece to gradually separate from between the two sets of assembly blocks, so that the U-shaped workpieces are evenly and neatly distributed on the conveyor belt mechanism, which facilitates the subsequent development of related equipment to collect and sort the U-shaped workpieces. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a partial schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the chain, pressing module, and bending mechanism combination of the present invention.

[0019] Figure 3 This is a cross-sectional view of the pressing module and chain assembly of the present invention.

[0020] Figure 4 This is a partial cross-sectional view of the structure of the present invention.

[0021] Figure 5 This is a cross-sectional view of the module body, movable module, pressing block, support plate, and lifting plate assembly of the present invention.

[0022] Figure 6 This is a schematic diagram of the active module of the present invention.

[0023] Figure 7 This is a schematic cross-sectional view of the overall structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the combination of the pressing module and the conveyor belt mechanism of the present invention.

[0025] Figure 9 This is a schematic diagram of the overall structure of the present invention.

[0026] In the diagram: 1. Frame; 101. Support platform;

[0027] 2. Drive shaft; 201. Guide plate; 2011. First outer ring; 2012. Second outer ring; 2013. Inclined surface;

[0028] 3. Sprockets; 4. Chains;

[0029] 5. Pressing module; 51. Placement groove; 52. Bending groove; 501. Module body; 5011. Second oblique groove;

[0030] 502, Movable Module; 5021, Movable Block; 211, Guide Groove; 212, Guide Rail; 213, Rectangular Groove; 214, Sliding Rod; 5022, Sliding Block; 5023, Connecting Block;

[0031] 503, Pressing block; 5031, Assembly block; 504, Guide post; 505, Spring; 506, Support plate; 5061, Pin; 507, Lifting plate; 5071, First inclined groove; 508, Bearing rod; 5081, Roller;

[0032] 6. Bending mechanism; 601. Support frame; 602. Cylinder; 603. Bracket; 604. Pressure roller;

[0033] 7. Conveyor belt mechanism; 701. Limit bar. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Example 1: As Figure 1 and Figure 2 As shown in the embodiment of the present invention, a continuous bending device for metal tubes includes a frame 1. Two sets of drive shafts 2 are symmetrically rotatably mounted inside the frame 1. Two sets of sprockets 3 are symmetrically mounted on the drive shafts 2. The two sets of sprockets 3 respectively mesh with two sets of chains 4. Several sets of pressing modules 5 are arranged around the two sets of chains 4. The pressing modules 5 are provided with placement grooves 51 and bending grooves 52, which are interconnected. A bending mechanism 6 is provided on the frame 1. The bending mechanism 6 includes a support frame 601, a cylinder 602 fixedly mounted on the frame 1, a bracket 603 mounted on the output end of the cylinder 602, and a pressure roller 604 fixedly mounted on the bracket 603. Two sets of support platforms 101 are symmetrically arranged inside the frame 1. The support platforms 101 are used to support the pressing modules 5.

[0036] Specifically, attached Figure 1The middle arrow indicates the loading point. Initially, a set of pressing modules 5 is located at the loading point. When bending the metal tube is required, the metal tube is placed on the set of pressing modules 5 located at the loading point, and the metal tube is positioned in the placement groove 51 on the pressing module 5. Then, a set of transmission shafts 2 are driven by a motor to rotate. The transmission shafts 2 drive two sets of sprockets 3 to rotate. The two sets of sprockets 3 drive two sets of chains 4, along with several sets of pressing modules 5, to perform a circular motion. The direction of the circular motion is from the loading point to the bending mechanism 6, until the pressing module 5 carrying the metal tube moves directly below the pressure roller 604 and is positioned on the two sets of support platforms 101. Then, the cylinder 602 is activated, pushing the bracket 603 and the pressure roller 604 downwards, causing the pressure roller 604 to press down on the metal tube, and the metal tube bends along the bending groove 52. During this process, the worker continues to place the metal tube onto a set of pressing modules 5 located at the loading point until the metal tube is bent into a U-shape. Then, the pressure roller 604 is withdrawn, and several sets of pressing modules 5 are driven to perform circular motion, so that the next set of pressing modules 5 carrying the metal tube moves directly below the pressure roller 604. The same operation is performed to bend the metal tube. At the same time, the metal tube to be bent is placed on the pressing module 5, and the bent workpiece is removed from the pressing module 5. The above operation is repeated. Compared with the prior art, by driving several sets of pressing modules 5 to perform circular motion, each set of pressing modules 5 can pass through the loading point and bending mechanism 6 in sequence. During the bending process of the metal tube, the worker can perform loading and unloading at the same time, saving loading and unloading time. This allows for continuous bending of the metal tube and improves the bending efficiency of the metal tube.

[0037] like Figure 3 and Figure 4As shown, the pressing module 5 includes a module body 501, with two sets of chains 4 fixedly connected to both sides of the module body 501, two sets of movable modules 502 symmetrically and movably installed inside the module body 501, a pressing block 503 fixedly connected to the movable modules 502, a placement groove 51 and a bending groove 52 both formed on the pressing block 503, two sets of support plates 506 fixedly installed on the movable modules 502, a lifting plate 507 movably installed between the two sets of support plates 506, two sets of guide posts 504 slidably connected to the lifting plate 507, the guide posts 504 fixedly installed inside the module body 501, and springs 505 sleeved on the guide posts 504 for fixing... The pressure rod 508 connecting the lifting plate 507 is provided with a pin 5061 between one end of the two sets of support plates 506. Two sets of first inclined grooves 5071 are symmetrically opened on the lifting plate 507. The pin 5061 is located in the first inclined groove 5071. The end of the pressure rod 508 is rotatably mounted with a roller 5081. A guide plate 201 is provided between the two sets of transmission shafts 2. The guide plate 201 is rotatably connected to the transmission shaft 2. The roller 5081 is rotatably connected to the outer ring of the guide plate 201. The outer ring of the guide plate 201 is composed of a first outer ring 2011, a second outer ring 2012 and an inclined surface 2013. A conveyor belt mechanism 7 for conveying workpieces is provided below the frame 1.

[0038] Specifically, when unloading the workpiece, the operator needs to manually remove the bent workpiece from the pressing module 5. This method results in low automation of the device. Secondly, since the metal tube is pressed into the bending groove 52, the metal tube has a certain rebound force, causing it to get stuck in the bending groove 52, making it inconvenient for the operator to remove the workpiece from the pressing module 5. After the metal tube is bent into a U-shaped workpiece, several sets of pressing modules 5 continue to be driven to perform circular motion. At this time, the spring 505 is in a compressed state, and the two sets of pressing blocks 503 are in a combined state. The rollers on the pressing module 5... Roller 5081 first rolls along the first outer ring 2011 until it is located at the intersection of the first outer ring 2011 and the second outer ring 2012. The U-shaped workpiece, along with the corresponding pressing module 5, is positioned above the conveyor belt mechanism 7. Under the rebound force of spring 505, the lifting plate 507 moves downward along the two sets of guide posts 504 until roller 5081 touches the second outer ring 2012. At the same time, the two sets of pins 5061 slide along the two sets of first inclined grooves 5071 respectively. Guided by the first inclined grooves 5071, the pins 5061 drive the support plate 506 along with... The active module 502 and the pressing block 503 move together. The two sets of pressing blocks 503 will separate and move in opposite directions. Under the action of gravity, the U-shaped workpiece pressed between the two sets of pressing blocks 503 will automatically fall onto the conveyor belt mechanism 7 below. The conveyor belt mechanism 7 will then transport the U-shaped workpiece to the next process. As the roller 5081 rolls along the second outer ring 2012, the roller 5081 will be pushed by the inclined surface 2013 until the roller 5081 rolls onto the first outer ring 2011, causing the two sets of pressing blocks 503 to merge again, thus realizing the automatic unloading of the U-shaped workpiece. In a cycle process, compared with the prior art, the patent disclosed in the above-mentioned announcement number CN222607794U discloses a metal tube bending positioning device that uses a pushing method to unload U-shaped workpieces. Because the force of the U-shaped workpiece being stuck in the bending groove 52 is relatively large, it leads to friction between the U-shaped workpiece and the bending groove 52, and the pushing generates a large resistance, which easily causes the U-shaped workpiece to deform. However, this solution separates the two sets of pressing blocks 503, so that the U-shaped workpiece is directly released from between the two sets of pressing blocks 503, and the unloading of the U-shaped workpiece is achieved while ensuring that the U-shaped workpiece is not deformed.

[0039] Example 2: Figures 5 to 9As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the movable module 502 includes a movable block 5021, the other end of the support plate 506 is fixedly connected to the movable block 5021, two sets of sliders 5022 are symmetrically slidably installed in the movable block 5021, a connecting block 5023 is fixedly installed on the sliders 5022, the pressing block 503 is formed by combining two sets of assembly blocks 5031, one end of the connecting block 5023 is fixedly connected to the assembly block 5031, and four sets of second oblique directions are provided on the module body 501. The second inclined groove 5011 is connected to the connecting block 5023, which passes through the groove 5011. The movable block 5021 has guide grooves 211 symmetrically opened at both ends. The guide grooves 211 are slidably connected to the guide rails 212, which are fixedly installed inside the module body 501. The movable block 5021 has a rectangular groove 213, and a slide rod 214 is fixedly installed inside the rectangular groove 213. The slider 5022 is slidably connected to the slide rods 214. Two sets of limit bars 701 are symmetrically installed on the conveyor belt mechanism 7, and there is a gap between the two sets of limit bars 701.

[0040] Specifically, during the unloading process, the U-shaped workpiece falls directly onto the conveyor belt mechanism 7, resulting in a very messy and irregular arrangement of the workpieces. This hinders the subsequent development of related equipment for collecting and organizing the workpieces. The gap between the two sets of limiting strips 701 is slightly larger than the outer diameter of the stainless steel. Initially, the two sets of assembly blocks 5031 are in a combined state. When the spring 505 rebounds and causes the two sets of movable modules 502 to move in opposite directions, the movable block 5021 on the movable module 502 slides along the guide rail 212. The movable block 5021 drives the two sets of sliders 5022, along with the two sets of connecting blocks 5023 and the two sets of assembly blocks 5031, to move, allowing the U-shaped workpiece to be released directly from between the two sets of pressing blocks 503. The U-shaped workpiece falls into the gap between the two sets of limiting strips 701, while the two sets of connecting blocks 5023 slide along the two sets of second inclined grooves 5011. Guided by the second inclined grooves 5011, the two sets of assembly blocks 5031 separate. The assembly blocks 5031 drive the slider 5022 to slide along the slide bar 214 through the connecting blocks 5023. The distance between the two sets of assembly blocks 5031 after separation is much larger than the outer diameter of the stainless steel. The conveyor belt mechanism 7 performs synchronous transmission with the circular motion of several sets of pressing modules 5. The conveyor belt mechanism 7 drives the U-shaped workpiece to move along the gap between the two sets of limiting strips 701. This will cause the U-shaped workpiece to gradually separate from the two sets of assembly blocks 5031, so that the U-shaped workpiece is evenly and neatly distributed on the conveyor belt mechanism 7, which facilitates the subsequent development of related equipment to collect and sort the U-shaped workpiece.

[0041] Working principle: The metal tube is placed onto a set of pressing modules 5 located at the loading point, and the metal tube is positioned in the placement groove 51 on the pressing module 5. Then, a set of transmission shafts 2 driven by a motor rotates, which drives two sets of sprockets 3 to rotate. The two sets of sprockets 3 drive two sets of chains 4, which, together with several sets of pressing modules 5, make circular motion. The direction of circular motion is from the loading point to the bending mechanism 6, until the pressing module 5 carrying the metal tube moves directly below the pressure roller 604 and is positioned on two sets of support platforms 101. Then, the cylinder 602 is activated, which pushes the bracket 603 along with the pressure roller. 604 moves downward, causing the pressure roller 604 to press down on the metal tube, and the metal tube bends along the bending groove 52. During this process, the worker continues to place the metal tube onto a set of pressing modules 5 located at the loading point until the metal tube is bent into a U shape. Then the pressure roller 604 is withdrawn, and several sets of pressing modules 5 are driven to make circular motion, so that the next set of pressing modules 5 carrying the metal tube moves directly below the pressure roller 604. The same operation is performed to bend the metal tube, and the metal tube to be bent is placed on the pressing module 5. The bent workpiece is removed from the pressing module 5, and the above operation is repeated.

[0042] After the metal tube is bent into a U-shaped workpiece, several sets of pressing modules 5 continue to move in a circular motion. At this time, the spring 505 is in a compressed state, and the two sets of pressing blocks 503 are in a combined state. The roller 5081 on the pressing module 5 first rolls along the first outer ring 2011 until the roller 5081 is located at the intersection of the first outer ring 2011 and the second outer ring 2012. The U-shaped workpiece, together with the corresponding pressing module 5, is located above the conveyor belt mechanism 7. Under the rebound force of the spring 505, the lifting plate 507 moves downward along the two sets of guide posts 504 until the roller 5081 touches the second outer ring 2012. At the same time, the two sets of pins 5061 move along the two sets of first inclined grooves 507 respectively. 1. Sliding, guided by the first inclined groove 5071, the pin 5061 drives the support plate 506 together with the movable module 502 and the pressing block 503 to move. The two sets of pressing blocks 503 will separate and move in opposite directions. Under the action of gravity, the U-shaped workpiece pressed between the two sets of pressing blocks 503 will automatically fall onto the conveyor belt mechanism 7 below. The conveyor belt mechanism 7 will then transport the U-shaped workpiece to the next process. As the roller 5081 rolls along the second outer ring 2012, the roller 5081 will be pushed by the inclined surface 2013 until the roller 5081 rolls onto the first outer ring 2011, causing the two sets of pressing blocks 503 to merge again, thus realizing the automatic unloading of the U-shaped workpiece.

[0043] When the two sets of movable modules 502 move in opposite directions under the rebound force of the spring 505, the movable block 5021 on the movable module 502 slides along the guide rail 212. The movable block 5021 drives the two sets of sliders 5022, together with the two sets of connecting blocks 5023 and the two sets of assembly blocks 5031, to move, so that the U-shaped workpiece is directly released from between the two sets of pressing blocks 503, and the U-shaped workpiece will fall into the gap between the two sets of limiting strips 701. At the same time, the two sets of connecting blocks 5023 slide along the two sets of second inclined grooves 5011. Guided by 5011, the two sets of assembly blocks 5031 are separated. The assembly blocks 5031 drive the slider 5022 to slide along the slide bar 214 through the connecting block 5023. The distance between the two sets of assembly blocks 5031 after separation is much larger than the outer diameter of the stainless steel. The conveyor belt mechanism 7 performs synchronous transmission with the circular motion of several sets of pressing modules 5. The conveyor belt mechanism 7 drives the U-shaped workpiece to move along the gap between the two sets of limit bars 701. This will cause the U-shaped workpiece to gradually separate from the two sets of assembly blocks 5031, so that the U-shaped workpiece is evenly and neatly distributed on the conveyor belt mechanism 7.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for continuous bending of metal tubes, comprising a frame (1), characterized in that: Two groups of transmission shafts (2) are symmetrically installed in the rack (1), two groups of chain wheels (3) are symmetrically installed on the transmission shafts (2), two groups of chains (4) are meshed with the two groups of chain wheels (3) respectively, a plurality of compression modules (5) are arranged around the two groups of chains (4), a placing groove (51) and a bending groove (52) are formed in the compression module (5), the placing groove (51) and the bending groove (52) are communicated with each other, and a bending mechanism (6) is arranged on the rack (1). The bending mechanism (6) comprises a support frame (601) which is fixedly installed on the rack (1). A cylinder (602) is fixedly installed on the support frame (601). A support (603) is installed on the output end of the cylinder (602). A compression roller (604) is fixedly installed on the support (603). The compression module (5) comprises a module main body (501), two groups of chains (4) are fixedly connected to the two sides of the module main body (501), two groups of movable modules (502) are symmetrically movably installed in the module main body (501), a compression block (503) is fixedly connected to the movable module (502), the placing groove (51) and the bending groove (52) are formed in the compression block (503), and two groups of supporting plates (506) are fixedly installed on the movable module (502). The other end of the supporting plate (506) is fixedly connected to the movable block (5021). Two groups of sliding blocks (5022) are symmetrically and slidably installed in the movable block (5021). A connecting block (5023) is fixedly installed on the sliding block (5022). The compression block (503) is formed by two groups of assembly blocks (5031), one end of the connecting block (5023) is fixedly connected to the assembly block (5031), four groups of second inclined grooves (5011) are formed in the module main body (501), the connecting block (5023) passes through the second inclined grooves (5011), guide grooves (211) are symmetrically formed at the two ends of the movable block (5021), the guide grooves (211) are slidably connected with guide rails (212), the guide rails (212) are fixedly installed in the module main body (501), a rectangular groove (213) is formed in the movable block (5021), a sliding rod (214) is fixedly installed in the rectangular groove (213), the sliding block (5022) is slidably connected with the sliding rod (214), a conveying belt mechanism (7) for conveying workpieces is arranged below the rack (1), two groups of limiting strips (701) are symmetrically installed on the conveying belt mechanism (7), and gaps exist between the two groups of limiting strips (701).

2. A device for continuous bending of a metal tube according to claim 1, characterized in that: Two groups of supporting tables (101) are symmetrically arranged in the rack (1), and the supporting tables (101) are used for supporting the compression modules (5).

3. The metal pipe continuous bending device according to claim 2, characterized in that: Further comprising a lifting plate (507) movably installed between the two groups of the supporting plates (506); Two groups of guide columns (504) are slidably connected with the lifting plate (507), and the guide columns (504) are fixedly installed in the module body (501); A spring (505) is sleeved on the guide column (504); A pressure bearing rod (508) is fixedly connected with the lifting plate (507).

4. A device for continuous bending of a metal tube according to claim 3, characterized in that: A pin shaft (5061) is arranged between one end of the two groups of the supporting plates (506), and two groups of first inclined grooves (5071) are symmetrically arranged on the lifting plate (507), and the pin shaft (5061) is located in the first inclined groove (5071).

5. A device for continuous bending of a metal tube according to claim 4, characterized in that: A roller (5081) is rotatably installed at the end of the pressure bearing rod (508), a guide plate (201) is arranged between the two groups of the transmission shafts (2), the guide plate (201) is rotatably connected with the transmission shaft (2), and the roller (5081) is rollingly connected with the outer ring of the guide plate (201).

6. A device for continuous bending of a metal tube according to claim 5, characterized in that: The outer ring of the guide plate (201) is composed of a first outer ring (2011), a second outer ring (2012) and an inclined surface (2013).

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