U-tube forming machine

Abstract

The application discloses a U-tube forming machine, which comprises a frame, a first assembly and a second assembly. The first assembly is arranged on the frame and is provided with a first clamping device for clamping one end of a pipe; the second assembly is arranged on the frame and is located on one side of the first assembly, and the second assembly comprises a die and a second clamping device, and the die and the second clamping device are configured to rotate relative to the first assembly; and the second clamping device is used for clamping the other end of the pipe. According to the U-tube forming machine, when the pipe is bent, the two ends of the pipe are fixed and clamped by the first clamping device and the second clamping device respectively, so that the stretching degrees of the two sides of the pipe tend to be consistent, the phenomenon of beveling is avoided or reduced, the product quality is improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and in particular to a U-tube forming machine. Background Technology

[0002] Small U-shaped tubes are used for connecting pipes. Traditional pipe bending equipment typically bends the tube first, then uses a saw blade to cut the top and bottom ends to make them flush. This process leaves debris and other impurities on the finished product, requiring cleaning and polluting the environment. To address this, existing technology proposes a pipe bending device using an internal cutting tool. In this device, one end of the tube is bent using a template, while the other end is cut without debris using an internal cutting tool, eliminating the need for tube cleaning. However, the different bending radii on both sides of the small U-shaped tube result in different stretching during bending. This leads to a severe bevel at the end of the tube that engages with the template, reducing product quality and increasing production costs. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a U-tube forming machine, which can reduce the phenomenon of beveled ends in pipe fittings and improve product quality.

[0004] According to an embodiment of the present invention, a U-tube forming machine includes a frame, a first component, and a second component. The first component is disposed on the frame and has a first clamping device for clamping one end of a tube. The second component is disposed on the frame and located on one side of the first component. The second component includes a template and a second clamping device, the template and the second clamping device being configured to rotate relative to the first component. The second clamping device is used to clamp the other end of the tube.

[0005] The U-tube forming machine according to the present invention has at least the following beneficial effects: the first component is provided with a first clamping device, and the second component is provided with a second clamping device. When the second component bends the tube using a template, both ends of the tube are fixed and clamped by the first clamping device and the second clamping device, respectively. As a result, the stretching on both sides of the tube tends to be consistent, avoiding or reducing the phenomenon of beveled ends, improving product quality and reducing costs.

[0006] According to some embodiments of the present invention, the second component further includes a first driving device and a connecting plate. The first driving device is disposed on the frame, one end of the connecting plate is connected to the first driving device in a transmission manner, and the second clamping device and the template are disposed on the connecting plate.

[0007] According to some embodiments of the present invention, the second clamping device includes a jaw, a sleeve, and a second driving device. The second driving device is mounted on the connecting plate, the jaw is mounted on the connecting plate, the sleeve is connected to the second driving device in a driving manner, the sleeve has a first through hole, the jaw has a second through hole, one end of the jaw has a clamping part, the clamping part is configured as a cylindrical tube, the clamping part has several notches, and the clamping part is inserted into the first through hole.

[0008] According to some embodiments of the present invention, the second component further includes a mandrel, which passes through the second through hole and is then inserted into the pipe. The connecting plate is provided with a first moving mechanism, which has a first output end that is slidable relative to the connecting plate. One end of the mandrel is mounted on the first output end.

[0009] According to some embodiments of the present invention, the first component further includes a forming device for bending and forming the tube, the forming device being disposed on the frame and located between the first clamping device and the second clamping device.

[0010] According to some embodiments of the present invention, the first component further includes a cutting device for cutting the pipe fitting.

[0011] According to some embodiments of the present invention, the cutting device includes a fourth driving device, a blade holder, and an inner cutting blade. The fourth driving device is mounted on the frame, the blade holder is disposed on one side of the first clamping device, the inner cutting blade is disposed on the blade holder, and the inner cutting blade is sleeved on the pipe. The fourth driving device can drive the blade holder to drive the inner cutting blade to cut the pipe.

[0012] According to some embodiments of the present invention, the cutting device further includes a first connecting shaft, a second connecting shaft, and an eccentric device. The first connecting shaft is connected to the fourth driving device. One end of the eccentric device is connected to the first connecting shaft, and the other end of the eccentric device is connected to one end of the second connecting shaft, causing the second connecting shaft to rotate eccentrically. The other end of the second connecting shaft is connected to the tool holder.

[0013] According to some embodiments of the present invention, the eccentric device includes a sliding shaft, a sliding block, and a limiting block. One end of the sliding block is connected to the first connecting shaft, and the other end is connected to the limiting block. A third through hole is provided in the sliding block, and the sliding shaft is slidably disposed in the third through hole. The limiting block is provided with a fourth through hole. One end of the sliding shaft is provided with an interface, which is inclined relative to the axis of the sliding shaft. The interface can pass through the third through hole and the fourth through hole. One end of the limiting block connected to the sliding block is provided with a sliding groove, and one end of the second connecting shaft is slidably disposed in the sliding groove and slidably inserted into the interface.

[0014] According to some embodiments of the present invention, the first component is further provided with a second moving mechanism, which is disposed on the frame and is capable of driving the sliding shaft to slide within the third through hole to allow the second connecting shaft to slide within the slide groove through the interface.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of a U-tube forming machine according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of some mechanisms of the U-tube forming machine is shown;

[0019] Figure 3 An exploded view of the cutting device and the third moving mechanism according to an embodiment of the present invention;

[0020] Figure 4 An exploded view of the eccentric device and the second connecting shaft according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of a molding apparatus according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of a first clamping device according to an embodiment of the present invention;

[0023] Figure 7 An exploded view of the second component according to an embodiment of the present invention;

[0024] Figure 8 for Figure 7Exploded view of the structure at point A in the middle;

[0025] Figure 9 This is an exploded view of a portion of a feeding assembly according to an embodiment of the present invention.

[0026] Figure label:

[0027] 100 racks;

[0028] Forming device 210, bending template 212, fixing part 211, bending die arc surface 2121, first clamping device 220, first fixed clamping mold 224, first movable clamping mold 223, first mounting base 222, sixth driving device 221, cutting device 230, fourth driving device 231, knife holder 235, internal cutting knife 236, first connecting shaft 232, eccentric device 233, second connecting shaft 234, sliding shaft 2331, interface 23311, protrusion 23312, slide block 2332, third through hole 23321, second notch 23322, limiting block 2333, slide groove 23332, second moving mechanism 240, fifth driving device 241, gear 242, rack 243, slider 244, second guide rail 245, connecting part 246, fifth through hole 2461;

[0029] Second component 300, first drive device 310, connecting plate 320, second clamping device 330, second drive device 331, oil cylinder 3311, piston 3312, sleeve 332, gripper 333, first through hole 3321, second through hole 3331, clamping part 3332, template 340, mandrel 350, first moving mechanism 360, third drive device 361, first output end 362, first guide rail 363;

[0030] Feeding assembly 400, third clamping device 410, second fixed clamping mold 414, second movable clamping mold 413, second mounting base 411, eighth drive device 412, conveying pipe 421, bracket 422, seventh drive device 430, third motor 431, nut 432, third motor 431, lead screw shaft 4311.

[0031] Guide assembly 500, fittings 600. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 2 According to an embodiment of the present invention, a U-tube forming machine includes a frame 100, a first component, and a second component 300. The first component is disposed on the frame 100 and has a first clamping device 220 for clamping one end of a tube fitting 600. The second component 300 is disposed on the frame 100 and located on one side of the first component. The second component 300 includes a template 340 and a second clamping device 330 for clamping the other end of the tube fitting 600. The template 340 and the second clamping device 330 are configured to rotate relative to the first component, thereby allowing the template 340 to bend the tube fitting 600. During the bending process of the tube fitting 600, both ends of the tube fitting 600 are always clamped and fixed, and the stretching on both sides of the tube fitting 600 tends to be consistent, thereby avoiding or reducing the phenomenon of a bevel at the end of the tube fitting 600 that mates with the template 340, thereby improving product quality and reducing production costs.

[0037] Reference Figure 2 and Figure 5In some embodiments, the first component further includes a forming device 210 for bending the pipe fitting 600. The forming device 210 is mounted on the frame 100 and located between the first clamping device 220 and the second clamping device 330. Specifically, the forming device 210 includes a bending template 212 and a fixing member 211. The fixing member 211 is fixed to the frame 100, and the bending template 212 is mounted on the fixing member 211. The bending template 212 has a plurality of bending die arc surfaces 2121. The shape of the bending die arc surfaces 2121 is adapted to the shape of the U-shaped pipe bending portion for shaping when the pipe fitting 600 is bent. The bending die arc surfaces 2121 can be set as one or more, thereby enabling one or more pipe fittings 600 to be bent simultaneously.

[0038] Reference Figure 2 In some embodiments, the second component 300 further includes a first driving device 310 and a connecting plate 320. The first driving device 310 is mounted on the frame 100, and one end of the connecting plate 320 is connected to the first driving device 310 for transmission. A second clamping device 330 and a template 340 are mounted on the connecting plate 320. The first driving device 310 drives the connecting plate 320 to rotate relative to the first component, thereby causing the second clamping device 330 and the template 340 to rotate relative to the first component. Thus, the forming device 210 and the template 340 can be used to bend and form the pipe 600. The first driving device 310 can be configured as a motor or a hydraulic motor, etc.

[0039] Reference Figure 1 , Figure 7 and Figure 8 In some embodiments, the second clamping device 330 includes a jaw 333, a sleeve 332, and a second driving device 331. The second driving device 331 is disposed on the connecting plate 320, the jaw 333 is mounted on the connecting plate 320, the sleeve 332 is connected to the second driving device 331 in a transmission manner, the sleeve 332 has a first through hole 3321, the jaw 333 has a second through hole 3331, one end of the jaw 333 has a clamping part 3332, the clamping part 3332 is configured as a round tube, a plurality of first notches are opened on the clamping part 3332, the clamping part 3332 is inserted into the first through hole 3321, and one end of the pipe 600 is inserted into the clamping part 3332. When the second driving device 331 drives the sleeve 332 to move to the clamping part 3332, the clamping part 3332 interferes with the sleeve 332. Because of the presence of the first notch, the clamping part 3332 can deform inward, thereby clamping the end of the pipe 600. When the second driving device 331 drives the sleeve 332 to leave the outer end of the clamping part 3332, the clamping part 3332 releases the pipe 600.

[0040] Reference Figure 1 , Figure 7 and Figure 8In some embodiments, to facilitate the installation of the second clamping device 330 and the template 340, the gripper 333 and the second driving device 331 are arranged in an upper and lower configuration. The second driving device 331 is a hydraulic drive device, which includes a cylinder 3311 and a piston 3312. The cylinder 3311 is mounted on the connecting plate 320, and the piston 3312 is mounted inside the cylinder 3311. One end of the gripper 333 is mounted on the upper side of the cylinder 3311 via a fixing seat 334. The clamping sleeve 332 is located on the upper side of the cylinder 3311 and connected to the piston 3312. The cylinder 3311 can drive the piston 3312 to move, thereby driving the clamping sleeve 332 to move. The template 340 is mounted on the cylinder 3311 and is located on one side of the gripper 333. Of course, those skilled in the art will understand that the second clamping device 330 can be configured in other ways. For example, the second driving device 331 can be driven by a cylinder or a motor, and the gripper 333 and the second driving device 331 can also be configured in a left-right layout. The specific configuration will not be described further.

[0041] Reference Figure 1 , Figure 7 and Figure 8 In some embodiments, in order to improve the quality of the product, the second component 300 is also provided with a mandrel 350 to assist in bending the tube 600. The mandrel 350 passes through the second through hole 3331 and is then inserted into the tube 600. The connecting plate 320 is provided with a first moving mechanism 360. The first moving mechanism 360 has a first output end 362. The first output end 362 can slide relative to the connecting plate 320. One end of the mandrel 350 is installed on the first output end 362. Specifically, the first moving mechanism 360 includes a third driving device 361 and a first guide rail 363. The first output end 362 is configured as a sliding plate. The third driving device 361 and the first guide rail 363 are mounted on the connecting plate 320. The sliding plate is slidably connected to the first guide rail 363. The third driving device 361 is driven by the sliding plate. The mandrel 350 is mounted on the sliding plate through a fixing block. The third driving device 361 can drive the sliding plate to slide along the first guide rail 363, thereby moving the mandrel 350. When bending the tube 600, the mandrel 350 can be inserted into the tube 600. After the tube 600 is bent, the mandrel 350 can be pulled out from the tube 600. The third driving device 361 can be a hydraulic drive device or a moving motor, etc. The specific configuration will not be described further.

[0042] Reference Figure 7 and Figure 8In some embodiments, the cylinder 3311 of the second clamping device 330 is mounted on the first output end 362. Therefore, when the third drive device 361 drives the first output end 362 to slide, it can move the second clamping device 330 and the template 340. This arrangement allows for adjustment of the positions of the template 340 and the second clamping device 330, thereby changing the bending length of the pipe 600. Furthermore, after the pipe 600 is bent, the third drive device 361 drives the template 340 and the second clamping device 330 away from the pipe 600, causing the pipe 600 to disengage from the template 340 and the second clamping device 330.

[0043] Reference Figures 1 to 3 In some embodiments, the first component further includes a cutting device 230 for cutting the pipe fitting 600.

[0044] Reference Figures 1 to 3 In some embodiments, the cutting device 230 includes a fourth drive device 231, a knife holder 235, and an inner cutting blade 236. The fourth drive device 231 is mounted on the frame 100, the knife holder 235 is disposed on one side of the first clamping device 220, and the inner cutting blade 236 is disposed on the knife holder 235 and sleeved on the pipe fitting 600. The fourth drive device 231 can drive the knife holder 235 to drive the inner cutting blade 236 to cut the pipe fitting 600. The cutting device 230 uses the inner cutting blade 236 to perform chip-free cutting on one end of the pipe fitting 600, eliminating the need to clean the pipe fitting 600, generating less waste, and reducing the number of times the U-tube forming machine needs to be stopped to clean waste.

[0045] Reference Figure 3 In some embodiments, the cutting device 230 further includes a first connecting shaft 232, a second connecting shaft 234, and an eccentric device 233. The first connecting shaft 232 is connected to the fourth driving device 231. One end of the eccentric device 233 is connected to the first connecting shaft 232, and the other end of the eccentric device 233 is connected to one end of the second connecting shaft 234, causing the second connecting shaft 234 to rotate eccentrically relative to the first connecting shaft 232. The other end of the second connecting shaft 234 is connected to the knife holder 235. When the second connecting shaft 234 rotates eccentrically relative to the first connecting shaft 232, the blade of the inner cutting knife 236 can cut the pipe 600 through the drive of the knife holder 235. The fourth driving device 231 is configured as a first motor. Of course, it is understood that the fourth driving device 231 can also be configured as a hydraulic motor or other devices; the specific configuration will not be described further.

[0046] Reference Figure 3 and Figure 4In some embodiments, the eccentric device 233 includes a sliding shaft 2331, a sliding block 2332, and a limiting block 2333. One end of the sliding block 2332 is connected to the first connecting shaft 232, and the other end is connected to the limiting block 2333. A third through hole 23321 is provided in the sliding block 2332. The sliding shaft 2331 is slidably disposed in the third through hole 23321. The limiting block 2333 is provided with a fourth through hole 23331. One end of the sliding shaft 2331 is provided with an interface 23311. The interface 23311 is inclined relative to the axis of the sliding shaft 2331. The interface 23311 can pass through the third through hole 23321 and the fourth through hole 23331. One end of the limiting block 2333 connected to the sliding block 2332 is provided with a groove 23332. One end of the second connecting shaft 234 is slidably disposed in the groove 23332 and is slidably inserted into the interface 23311.

[0047] Reference Figure 2 In some embodiments, to enable the sliding shaft 2331 to slide within the slide block 2332, the first component is further provided with a second moving mechanism 240. The second moving mechanism 240 is mounted on the frame 100 and can drive the sliding shaft 2331 to slide within the third through hole 23321. This, in turn, causes the second connecting shaft 234 to slide within the slide groove 23332 via the interface 23311, thus changing the eccentricity of the second connecting shaft 234 relative to the first connecting shaft 232. With this configuration, by changing the eccentricity, the inner cutting blade 236 can cut from the outer periphery of the pipe fitting 600 towards its inner wall.

[0048] Reference Figure 3In some embodiments, the second moving mechanism 240 includes a fifth driving device 241 and a connecting member 246. The fifth driving device 241 is mounted on the frame 100 and is connected to the connecting member 246 in a transmission manner. The connecting member 246 is slidably disposed on the frame 100, and both ends of the connecting member 246 are connected to a sliding shaft 2331. Thus, the fifth driving device 241 can drive the connecting member 246 and the sliding shaft 2331 to slide within the slide block 2332. Specifically, the fifth driving device 241 is configured as a second motor. The second motor has an output shaft, on which a gear 242 is fixed. A rack 243 is mounted on the connecting member 246, and the gear 242 and the rack 243 mesh and transmit power. A second guide rail 245 is also provided on the frame 100, on which a slider 244 is slidably disposed. The slider 244 is connected to the connecting member 246, thus the second motor can drive the connecting member 246 to slide. The connector 246 has a fifth through hole 2461, through which both ends of the connector 246 are fitted onto the eccentric device 233. A second notch 23322 is formed on the outer wall of the third through hole 23321 of the slide block 2332. A protrusion 23312 is provided on the sliding shaft 2331, which can slide within the second notch 23322. The protrusion 23312 is movably connected to the fifth through hole 2461, thus allowing the connector 246 to push the sliding shaft 2331 to slide via the protrusion 23312. By controlling the output shaft speed of the second motor, the rate of change of the eccentricity can be controlled, i.e., the feed speed of the inner cutter 236 can be controlled. This configuration allows for a smooth change of the eccentricity, i.e., a smooth feed of the inner cutter 236, preventing excessive wear of the inner cutter 236 and improving its service life. The second moving mechanism 240 can also be configured in other ways, such as by driving the connecting piece 246 through a cylinder or hydraulic drive device.

[0049] Reference Figure 1 and Figure 2 In some embodiments, when the U-tube forming machine processes small U-tubes, if the length of the small tube is short, the tool holder 235 is positioned between the first clamping device 220 and the forming device 210. The positions of the template 340 and the second clamping device 330 are adjusted using the first moving mechanism 360 to change the length of the processed portion of the tube 600. Then, the tube 600 is bent and cut off using the cutting device 230, thereby obtaining a shorter small U-tube. Of course, it is understood that by changing the setting position of the tool holder 235 and adjusting the positions of the template 340 and the second clamping device 330, the U-tube forming machine can process U-tubes of different lengths.

[0050] Reference Figure 2 and Figure 6In some embodiments, the first clamping device 220 includes a first fixed clamping mold 224, a first movable clamping mold 223, a first mounting base 222, and a sixth driving device 221. The first mounting base 222 is fixed on the frame 100. The first fixed clamping mold 224 is disposed on the upper side of the first mounting base 222. The first movable clamping mold 223 is movably disposed between the first fixed clamping mold 224 and the first mounting base 222. The sixth driving device 221 is fixed to the first mounting base 222. The sixth driving device 221 can drive the first movable clamping mold 223 to move towards the first fixed clamping mold 224, thereby clamping the pipe fitting 600 through the cooperation of the first fixed clamping mold 224 and the first movable clamping mold 223. The sixth driving device 221 can be a hydraulic drive device or a moving motor, etc. The specific configuration will not be described further.

[0051] Reference Figure 2 In some embodiments, the frame 100 is provided with a guide assembly 500 and a feeding assembly 400. The guide assembly 500 is located on one side of the cutting device 230 and can guide the pipe 600; the feeding assembly 400 is located between the guide assembly 500 and the cutting device 230 and can transport the pipe 600 to the cutting device 230.

[0052] Reference Figure 2 and Figure 9 In some embodiments, the feeding assembly 400 includes a seventh driving device 430, a third clamping device 410, and a plurality of conveying pipes 421. The third clamping device 410 is slidably mounted on the frame 100 and located on one side of the first clamping device 220. The conveying pipes 421 are disposed between the third clamping device 410 and the first clamping device 220, and one end of the conveying pipe 421 is fixed to the frame 100 by a bracket 422. The seventh driving device 430 is drive-connected to the third clamping device 410. The third clamping device 410 clamps the pipe 600. The seventh driving device 430 can drive the third clamping device 410 to move toward the location of the cutting device 230. Then, the pipe 600 passes through the conveying pipes 421, the first clamping device 220, and other mechanisms in sequence to reach the second clamping device 330, completing the feeding process.

[0053] Reference Figure 6 and Figure 9 The third clamping device 410 has a similar structure to the first clamping device 220, including a second fixed clamping mold 414, a second movable clamping mold 413, a second mounting base 411 and an eighth driving device 412. The specific configuration will not be described further.

[0054] Reference Figure 9The seventh drive device 430 includes a third motor 431 and a nut 432. The third motor 431 has a lead screw shaft 4311. The nut 432 is mounted on one side of the second mounting base 411. The lead screw shaft 4311 and the nut 432 are connected by transmission, so that the seventh drive device 430 can drive the third clamping device 410 to slide.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A U-tube forming machine, characterized in that, include: Rack (100); A first component is disposed on the frame (100) and has a first clamping device (220) for clamping one end of a pipe fitting (600); The second component (300) is disposed on the frame (100) and located on one side of the first component. The second component (300) includes a template (340) and a second clamping device (330). The template (340) and the second clamping device (330) are configured to rotate relative to the first component. The second clamping device (330) is used to clamp the other end of the pipe fitting (600). The second component (300) further includes a first drive device (310) and a connecting plate (320). The first drive device (310) is mounted on the frame (100). One end of the connecting plate (320) is connected to the first drive device (310) in a transmission manner. The second clamping device (330) and the template (340) are mounted on the connecting plate (320). The second clamping device (330) includes a jaw (333), a sleeve (332), and a second driving device (331). The second driving device (331) is mounted on the connecting plate (320), the jaw (333) is mounted on the connecting plate (320), the sleeve (332) is connected to the second driving device (331) in a transmission manner, the sleeve (332) has a first through hole (3321), the jaw (333) has a second through hole (3331), one end of the jaw (333) has a clamping part (3332), the clamping part (3332) is configured as a cylindrical tube, the clamping part (3332) has several first notches, and the clamping part (3332) is inserted into the first through hole (3321). The second component (300) further includes a mandrel (350), which passes through the second through hole (3331) and is then inserted into the pipe (600). The connecting plate (320) is provided with a first moving mechanism (360), which has a first output end (362). The first output end (362) is slidable relative to the connecting plate (320). One end of the mandrel (350) is mounted on the first output end (362). The first component also includes a forming device (210) for bending the pipe (600), the forming device (210) being disposed on the frame (100) and located between the first clamping device (220) and the second clamping device (330); The second driving device (331) includes a hydraulic cylinder (3311) and a piston (3312). The hydraulic cylinder (3311) is mounted on the first output end (362), and the piston (3312) is disposed inside the hydraulic cylinder (3311). One end of the gripper (333) is mounted on the upper side of the hydraulic cylinder (3311) through a fixed seat (334). The sleeve (332) is located on the upper side of the hydraulic cylinder (3311) and connected to the piston (3312). The hydraulic cylinder (3311) can drive the piston (3312) to move, thereby driving the sleeve (332) to move. The template (340) is mounted on the hydraulic cylinder (3311) and located on one side of the gripper (333). The first driving device (310) drives the connecting plate (320) to rotate relative to the first component, thereby causing the second clamping device (330) and the template (340) to rotate relative to the first component, so as to use the mandrel (350), the forming device (210) and the template (340) to bend and form the pipe (600).

2. The U-tube forming machine according to claim 1, characterized in that, The first component also includes a cutting device (230) for cutting the pipe fitting (600).

3. The U-tube forming machine according to claim 2, characterized in that, The cutting device (230) includes a fourth driving device (231), a knife holder (235), and an inner cutting knife (236). The fourth driving device (231) is mounted on the frame (100). The knife holder (235) is located on one side of the first clamping device (220). The inner cutting knife (236) is located on the knife holder (235) and is sleeved on the pipe fitting (600). The fourth driving device (231) can drive the knife holder (235) to drive the inner cutting knife (236) to cut the pipe fitting (600).

4. The U-tube forming machine according to claim 3, characterized in that, The cutting device (230) further includes a first connecting shaft (232), a second connecting shaft (234), and an eccentric device (233). The first connecting shaft (232) is connected to the fourth driving device (231). One end of the eccentric device (233) is connected to the first connecting shaft (232), and the other end of the eccentric device (233) is connected to one end of the second connecting shaft (234) so ​​that the second connecting shaft (234) rotates eccentrically relative to the first connecting shaft (232). The other end of the second connecting shaft (234) is connected to the tool holder (235).

5. The U-tube forming machine according to claim 4, characterized in that, The eccentric device (233) includes a sliding shaft (2331), a sliding block (2332), and a limiting block (2333). One end of the sliding block (2332) is connected to the first connecting shaft (232), and the other end is connected to the limiting block (2333). A third through hole (23321) is provided in the sliding block (2332), and the sliding shaft (2331) is slidably disposed in the third through hole (23321). The limiting block (2333) is provided with a fourth through hole (23331). One end of the sliding shaft (2331) is connected to the first connecting shaft (232), and the other end is connected to the limiting block (2333). An interface (23311) is provided at one end. The interface (23311) is inclined relative to the axis of the sliding shaft (2331). The interface (23311) can pass through the third through hole (23321) and the fourth through hole (23331). The limiting block (2333) is connected to the slide block (2332) at one end with a sliding groove (23332). One end of the second connecting shaft (234) is slidably disposed in the sliding groove (23332) and is slidably inserted into the interface (23311) relative to it.

6. The U-tube forming machine according to claim 5, characterized in that, The first component is further provided with a second moving mechanism (240), which is disposed on the frame (100). The second moving mechanism (240) can drive the sliding shaft (2331) to slide in the third through hole (23321) so as to allow the second connecting shaft (234) to slide in the groove (23332) through the interface (23311).

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