CN213613513U - U-shaped pipe forming machine - Google Patents

Abstract

The utility model discloses a U pipe make-up machine, including frame, first subassembly and second subassembly. The first assembly is arranged on the rack and provided with a first clamping device, and the first clamping device is used for clamping one end of the pipe fitting; the second assembly is arranged on the rack and located on one side of the first assembly, the second assembly comprises a profiling mold and a second clamping device, the profiling mold and the second clamping device are configured to be capable of rotating relative to the first assembly, and the second clamping device is used for clamping the other end of the pipe fitting. According to the utility model discloses U pipe make-up machine, when bending to the pipe fitting, the both ends of pipe fitting are respectively by first clamping device, second clamping device fixed clamp tightly, so the tensile degree trend of pipe fitting both sides is unanimous, has avoided or has alleviateed the phenomenon of bevel connection, improves product quality and reduce cost.

Description

U-shaped pipe forming machine

Technical Field

The utility model relates to a tubular product processing technology field, in particular to U pipe make-up machine.

Background

The small U pipe is used for being connected between the pipe and the pipe, and when traditional return bend equipment processing small U pipe, generally bend earlier the pipe fitting, then utilize the upper and lower both ends of saw bit cutting finished product so that two terminal surfaces parallel and level, this kind of processing mode is attached with debris such as piece on the finished product, need wash with the cleaner, the polluted environment. Therefore, the prior art provides a pipe bending device adopting an inner cutter device, when a small U pipe is processed, one end of the pipe fitting is bent by matching a profiling mold and the pipe, the other end of the pipe fitting is cut by utilizing the inner cutter in a chipless manner, and the pipe fitting does not need to be cleaned. However, the bending radius of the two sides of the small U-shaped pipe is different, the stretching degree of the two sides of the pipe is different when the pipe is bent, and one end of the small U-shaped pipe matched with the profiling mold can generate a serious bevel problem, so that the quality of a finished product is reduced, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a U pipe make-up machine, U pipe make-up machine can alleviate the phenomenon that the pipe fitting produced the bevel connection, improves product quality.

According to the utility model discloses U pipe make-up machine, including frame, first subassembly and second subassembly. The first assembly is arranged on the rack and provided with a first clamping device used for clamping one end of a pipe fitting; the second assembly is arranged on the rack and located on one side of the first assembly, the second assembly comprises a profiling and a second clamping device, the profiling and the second clamping device are configured to be capable of rotating relative to the first assembly, and the second clamping device is used for clamping the other end of the pipe fitting.

According to the utility model discloses U pipe make-up machine has following beneficial effect at least: the first assembly is provided with a first clamping device, the second assembly is provided with a second clamping device, when the second assembly bends the pipe fitting by utilizing the profiling, two ends of the pipe fitting are fixedly clamped by the first clamping device and the second clamping device respectively, so that the stretching degrees of two sides of the pipe fitting tend to be consistent, the phenomenon of inclined openings is avoided or reduced, the product quality is improved, and the cost is reduced.

According to some embodiments of the present invention, the second component assembly further comprises a first driving device, a connecting plate, the first driving device is disposed on the frame, one end of the connecting plate is in transmission connection with the first driving device, the second clamping device and the explorator are disposed on the connecting plate.

According to some embodiments of the utility model, the second clamping device includes the clamping jaw, presss from both sides cover and second drive arrangement, second drive arrangement install in on the connecting plate, the clamping jaw install in on the connecting plate, press from both sides the cover with the second drive arrangement transmission is connected, it has first through-hole to press from both sides the cover, the clamping jaw has the second through-hole, the one end of clamping jaw has the clamping part, the clamping part sets up to the pipe form, set up a plurality of breachs on the clamping part, the clamping part is inserted and is located in the first through-hole.

According to some embodiments of the utility model, the second subassembly still includes the plug, the plug is worn to locate in and then inserts and locate in the pipe fitting in the second through-hole, be provided with first moving mechanism on the connecting plate, first moving mechanism has first output, first output can be relative the connecting plate slides, the one end of plug install in first output.

According to some embodiments of the present invention, the first assembly further comprises a forming device for bending the pipe, the forming device is disposed on the frame and between the first clamping device and the second clamping device.

According to some embodiments of the invention, the first component further comprises a cutting device for cutting off the pipe.

According to the utility model discloses a few embodiments, cutting device includes fourth drive arrangement, knife rest, interior cutter, fourth drive arrangement install in the frame, the knife rest sets up one side of first clamping device, interior cutter sets up on the knife rest, the pipe fitting is located to interior cutter cover, fourth drive arrangement can drive knife rest drive interior cutter cutting pipe fitting.

According to some embodiments of the utility model, cutting device still includes first connecting axle, second connecting axle, eccentric device, first connecting axle with the fourth drive transmission is connected, eccentric device one end with first connecting axle is connected, the eccentric device other end with the one end of second connecting axle is connected and is made the eccentric rotation of second connecting axle, the other end of second connecting axle with the knife rest is connected.

According to the utility model discloses a some embodiments, eccentric device includes sliding shaft, slide, restriction piece, slide one end is connected first connecting axle, the other end is connected restriction piece, the third through-hole has been seted up in the slide, the sliding shaft slidable set up in the third through-hole, the fourth through-hole has been seted up to restriction piece, the interface has been seted up to the one end of sliding shaft, the interface is relative the axis slope setting of sliding shaft, the interface can pass the third through-hole with the fourth through-hole, restriction piece is connected the spout has been seted up to the one end of slide, the one end slidable of second connecting axle sets up in the spout and with but interface relative slip ground is pegged graft.

According to some embodiments of the utility model, first subassembly still is provided with second moving mechanism, second moving mechanism sets up in the frame, second moving mechanism can drive the sliding shaft is in the third through-hole slides in order to pass through the interface makes the second connecting axle is in slide in the spout.

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.

Drawings

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

fig. 1 is a schematic view of a U-tube forming machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the mechanism of the U-tube forming machine shown in FIG. 1;

fig. 3 is an exploded view of a cutting device and a third moving mechanism according to an embodiment of the present invention;

fig. 4 is an exploded view of an eccentric device and a second connecting shaft according to an embodiment of the present invention;

fig. 5 is a schematic view of a molding apparatus according to an embodiment of the present invention;

fig. 6 is a schematic view of a first clamping device according to an embodiment of the present invention;

fig. 7 is an exploded view of a second assembly according to an embodiment of the present invention;

FIG. 8 is an exploded view of the mechanism at A in FIG. 7;

fig. 9 is an exploded view of a portion of a feed assembly according to an embodiment of the present invention.

Reference numerals:

a frame 100;

the forming device 210, the bending die plate 212, the fixing member 211, the bending die arc surface 2121, the first clamping device 220, the first fixed clamping die 224, the first movable clamping die 223, the first mounting seat 222, the sixth driving device 221, the cutting device 230, the fourth driving device 231, the tool post 235, the inner cutter 236, the first connecting shaft 232, the eccentric device 233, the second connecting shaft 234, the sliding shaft 2331, the interface 23311, the protrusion 23312, the sliding seat 2332, the third through hole 23321, the second notch 23322, the limiting block 2333, the sliding groove 23332, the second moving mechanism 240, the fifth driving device 241, the gear 242, the rack 243, the sliding block 244, the second rail member 245, the connecting member 246, and the fifth through hole 2461;

a second assembly 300, a first driving device 310, a connecting plate 320, a second clamping device 330, a second driving device 331, a cylinder 3311, a piston 3312, a collet 332, a clamping jaw 333, a first through hole 3321, a second through hole 3331, a clamping portion 3332, a master 340, a mandrel 350, a first moving mechanism 360, a third driving device 361, a first output end 362, and a first rail member 363;

the feeding assembly 400, the third clamping device 410, the second fixed clamping die 414, the second movable clamping die 413, the second mounting seat 411, the eighth driving device 412, the conveying pipeline 421, the bracket 422, the seventh driving device 430, the third motor 431, the nut 432, the third motor 431 and the screw shaft 4311;

guide assembly 500, pipe 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 2, a U-tube forming machine according to an embodiment of the present invention includes a frame 100, a first assembly, and a second assembly 300. A first assembly is arranged on the frame 100, the first assembly has a first clamping device 220, the first clamping device 220 is used for clamping one end of the pipe 600; the second assembly 300 is disposed on the frame 100 and located at one side of the first assembly, the second assembly 300 includes a cam 340 and a second clamping device 330, the second clamping device 330 is used for clamping the other end of the pipe 600, and the cam 340 and the second clamping device 330 are configured to be rotatable relative to the first assembly so as to bend the pipe 600 by using the cam 340. In the process of bending the pipe 600, the two ends of the pipe 600 are always clamped and fixed, and the stretching degrees of the two sides of the pipe 600 tend to be consistent, so that the phenomenon that one end of the pipe 600 matched with the profiling 340 generates an inclined opening is avoided or reduced, the product quality is improved, and the production cost is reduced.

Referring to fig. 2 and 5, in some embodiments, the first assembly further includes a forming device 210, the forming device 210 is used for bending the pipe 600, and the forming device 210 is disposed on the frame 100 between the first clamping device 220 and the second clamping device 330. Specifically, the forming device 210 includes a bending die plate 212 and a fixing member 211, the fixing member 211 is fixed to the frame 100, the bending die plate 212 is mounted on the fixing member 211, and the bending die plate 212 has a plurality of bending die curved surfaces 2121. The shape of the curved surface 2121 of the bending die is adapted to the shape of the bent portion of the U-shaped pipe to be shaped when the pipe 600 is bent, and one or more curved surfaces 2121 may be provided, so that one or more pipe 600 can be bent at the same time.

Referring to fig. 2, in some embodiments, the second assembly 300 further includes a first driving device 310 and a connecting plate 320, the first driving device 310 is disposed on the frame 100, one end of the connecting plate 320 is in transmission connection with the first driving device 310, the second clamping device 330 and the profile 340 are disposed on the connecting plate 320, the first driving device 310 drives the connecting plate 320 to rotate relative to the first assembly, and further the second clamping device 330 and the profile 340 rotate relative to the first assembly, so that the forming device 210 and the profile 340 can be used to bend and form the pipe 600. The first driving device 310 may be configured as an electric motor or a hydraulic motor.

Referring to fig. 1, 7 and 8, in some embodiments, the second clamping device 330 includes a clamping jaw 333, a collet 332 and a second driving device 331, the second driving device 331 is disposed on the connecting plate 320, the clamping jaw 333 is mounted on the connecting plate 320, the collet 332 is in transmission connection with the second driving device 331, the collet 332 has a first through hole 3321, the clamping jaw 333 has a second through hole 3331, one end of the clamping jaw 333 has a clamping portion 3332, the clamping portion 3332 is configured in a circular tube shape, a plurality of first notches are formed in the clamping portion 3332, the clamping portion 3332 is inserted into the first through hole 3321, and one end of the pipe 600 is inserted into the clamping portion 3332. When the second driving means 331 drives the collet 332 to move to the clamping portion 3332, the clamping portion 3332 interferes with the collet 332, the clamping portion 3332 may be deformed inwardly due to the presence of the first notch, and the clamping portion 3332 clamps the end of the pipe 600, and when the second driving means 331 drives the collet 332 to move away from the outer end of the clamping portion 3332, the clamping portion 3332 releases the pipe 600.

Referring to fig. 1, 7 and 8, in some embodiments, in order to facilitate installation of the second clamping device 330 and the cam 340, the clamping jaws 333 and the second driving device 331 are arranged in an up-down arrangement. The second driving device 331 is a hydraulic driving device, the hydraulic driving device includes an oil cylinder 3311 and a piston 3312, the oil cylinder 3311 is disposed on the connecting plate 320, the piston 3312 is disposed in the oil cylinder 3311, one end of the clamping jaw 333 is mounted on the upper side of the oil cylinder 3311 through a fixing seat 334, the collet 332 is located on the upper side of the oil cylinder 3311 and connected with the piston 3312, and the oil cylinder 3311 can drive the piston 3312 to move so as to drive the collet 332 to move; the cam 340 is mounted on the cylinder 3311 and is located on the side of the jaw 333. Of course, it will be understood by those skilled in the art that the second clamping device 330 may be disposed in other manners, for example, the second driving device 331 may be driven by an air cylinder or a motor, and the clamping jaw 333 and the second driving device 331 may also be disposed in a left-right arrangement, and the specific manner will not be described.

Referring to fig. 1, 7 and 8, in some embodiments, in order to improve the quality of the product, the second assembly 300 is further provided with a mandrel 350 to assist the bending of the pipe 600, the mandrel 350 is inserted into the second through hole 3331 and then inserted into the pipe 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, and one end of the mandrel 350 is mounted at the first output end 362. Specifically, the first moving mechanism 360 includes a third driving device 361 and a first rail member 363, the first output end 362 is configured as a sliding plate, the third driving device 361 and the first rail member 363 are mounted on the connecting plate 320, the sliding plate is slidably connected to the first rail member 363, the third driving device 361 is in transmission connection with the sliding plate, the mandrel 350 is mounted on the sliding plate through a fixed block, the third driving device 361 can drive the sliding plate to slide along the first rail member 363 to drive the mandrel 350 to move, so that the mandrel 350 can be inserted into the pipe 600 when the pipe 600 is bent, and the mandrel 350 can be pulled out of the pipe 600 after the pipe 600 is bent. The third driving device 361 may be a hydraulic driving device or a moving motor, and the specific arrangement is not described.

Referring to fig. 7 and 8, in some embodiments, the cylinder 3311 of the second clamping device 330 is mounted on the first output end 362, so that the third driving device 361 drives the first output end 362 to slide, thereby moving the second clamping device 330 and the cam 340. With this arrangement, on one hand, the positions of the cam 340 and the second clamping device 330 can be adjusted, so as to change the bending length of the pipe 600; on the other hand, after the pipe 600 is bent, the third driving device 361 drives the cam 340 and the second clamping device 330 to move away from the pipe 600, and the pipe 600 is separated from the cam 340 and the second clamping device 330.

Referring to fig. 1-3, in some embodiments, the first assembly further comprises a severing device 230, the severing device 230 for severing the tubular 600.

Referring to fig. 1 to 3, in some embodiments, the cutting device 230 includes a fourth driving device 231, a tool holder 235, and an inner cutter 236, the fourth driving device 231 is mounted on the frame 100, the tool holder 235 is disposed at one side of the first clamping device 220, the inner cutter 236 is disposed on the tool holder 235, the inner cutter 236 is sleeved on the pipe 600, and the fourth driving device 231 can drive the tool holder 235 to drive the inner cutter 236 to cut the pipe 600. The cutting device 230 uses the inner cutter 236 to perform chipless cutting on one end of the pipe 600, the pipe 600 does not need to be cleaned, the generated waste is less, and the frequency of stopping the U-pipe forming machine to clean the waste can be reduced.

Referring to fig. 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 drivingly connected to the fourth driving device 231, one end of the eccentric device 233 is connected to the first connecting shaft 232, 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 eccentrically rotates with respect to the first connecting shaft 232, and the other end of the second connecting shaft 234 is connected to the tool holder 235. When the second connecting shaft 234 eccentrically rotates relative to the first connecting shaft 232, the blade of the inner cutter 236 can cut the pipe 600 by being driven by the cutter holder 235. The fourth driving device 231 is configured as a first electric machine, and it is understood that the fourth driving device 231 may also be configured as a hydraulic motor, and the specific configuration is not described again.

Referring to fig. 3 and 4, in some embodiments, the eccentric device 233 includes a sliding shaft 2331, a sliding seat 2332, and a limiting block 2333, the sliding seat 2332 is connected to the first connecting shaft 232 at one end thereof and connected to the limiting block 2333 at the other end thereof, a third through hole 23321 is formed in the sliding seat 2332, the sliding shaft 2331 is slidably disposed in the third through hole 23321, the limiting block 2333 is formed with a fourth through hole 23331, an interface 23311 is formed at one end of the sliding shaft 2331, the interface 23311 is disposed to be inclined with respect to an axis of the sliding shaft 2331, the interface 23311 can pass through the third through hole 23321 and the fourth through hole 23331, a sliding groove 23332 is formed at one end of the limiting block 2333 connected to the sliding seat 2332, and one end of the second connecting shaft 234 is slidably disposed in the sliding groove 233.

Referring to fig. 2, in some embodiments, in order to slide the sliding shaft 2331 in the sliding seat 2332, the first assembly is further provided with a second moving mechanism 240, the second moving mechanism 240 is provided on the frame 100, and the second moving mechanism 240 can drive the sliding shaft 2331 to slide in the third through hole 23321, so that the second connecting shaft 234 slides in the sliding groove 23332 through the interface 23311, and thus the eccentricity of the second connecting shaft 234 relative to the first connecting shaft 232 is changed. So configured, the inner cutter 236 can cut from the outer circumference of the tube 600 to the inner wall of the tube 600 by varying the eccentricity.

Referring to fig. 3, in some embodiments, the second moving mechanism 240 includes a fifth driving device 241, a connecting member 246, the fifth driving device 241 is mounted to the frame 100, the fifth driving device 241 is drivingly connected to the connecting member 246, the connecting member 246 is slidably disposed on the frame 100, and both ends of the connecting member 246 are connected to the sliding shaft 2331, so that the fifth driving device 241 can drive the connecting member 246 to slide the sliding shaft 2331 in the sliding seat 2332. Specifically, the fifth driving device 241 is configured as a second motor, the second motor has an output shaft, a gear 242 is fixed on the output shaft, a rack 243 is installed on the connecting member 246, the gear 242 is in meshing transmission with the rack 243, the rack 100 is further provided with a second rail member 245, a slider 244 is slidably disposed on the second rail member 245, the slider 244 is connected to the connecting member 246, and thus the second motor can drive the connecting member 246 to slide. The connecting member 246 has a fifth through hole 2461, and the two ends of the connecting member 246 are sleeved on the eccentric device 233 through the fifth through hole 2461; the sliding seat 2332 has a second notch 23322 formed on an outer wall of the third through hole 23321, the sliding shaft 2331 has a protrusion 23312, the protrusion 23312 can slide in the second notch 23322, and the protrusion 23312 is movably connected to the fifth through hole 2461, so that the connecting member 246 can push the sliding shaft 2331 to slide through the protrusion 23312. By controlling the rotation speed of the output shaft of the second motor, the changing speed of the eccentricity, that is, the feeding speed of the inner cutter 236 can be controlled. With this arrangement, the eccentricity can be gently changed, that is, the inner cutter 236 is gently fed, so that excessive wear of the inner cutter 236 can be avoided, and the service life of the inner cutter 236 can be prolonged. The second moving mechanism 240 may be arranged in other ways, such as by actuating the link 246 by means of a pneumatic cylinder or a hydraulic actuator.

Referring to fig. 1 and 2, in some embodiments, when a U-tube forming machine processes a small U-tube, if the small tube has a short length, a knife rest 235 is disposed between a first clamping device 220 and a forming device 210, positions of a cam 340 and a second clamping device 330 are adjusted by a first moving mechanism 360 to change the length of a processed portion of a tube 600, the tube 600 is bent, and the tube 600 is cut by a cutting device 230, thereby obtaining a short small U-tube. Of course, it can be understood that the U-tube forming machine can process U-tubes of different lengths by changing the position of the knife rest 235 and adjusting the positions of the cam 340 and the second clamping device 330.

Referring to fig. 2 and 6, in some embodiments, first clamping device 220 includes a first fixed clamping die 224, a first movable clamping die 223, a first mounting seat 222, and a sixth driving device 221, where first mounting seat 222 is fixed on machine frame 100, first fixed clamping die 224 is disposed on an upper side of first mounting seat 222, first movable clamping die 223 is movably disposed between first fixed clamping die 224 and first mounting seat 222, sixth driving device 221 is fixed to first mounting seat 222, sixth driving device 221 is capable of driving first movable clamping die 223 to move toward first fixed clamping die 224, and first clamping device 220 clamps pipe 600 through cooperation of first fixed clamping die 224 and first movable clamping die 223. The sixth driving device 221 may be a hydraulic driving device or a moving motor, and the specific arrangement is not described.

Referring to fig. 2, in some embodiments, a guide assembly 500 and a feed assembly 400 are disposed on the frame 100. The guide assembly 500 is positioned at one side of the cutting device 230, and the guide assembly 500 can calibrate the pipe 600; the feed assembly 400 is positioned between the guide assembly 500 and the cutting device 230, and the feed assembly 400 is capable of delivering the tubular 600 to the cutting device 230.

Referring to fig. 2 and 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 disposed on the frame 100 and located at 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, one end of the conveying pipes 421 is fixed on the frame 100 through a support 422, and the seventh driving device 430 is in transmission connection with the third clamping device 410. The third clamping device 410 clamps the pipe 600, the seventh driving device 430 may drive the third clamping device 410 to move to the position of the cutting device 230, and the pipe 600 sequentially passes through the conveying pipeline 421, the first clamping device 220, and the like and then reaches the second clamping device 330, thereby completing the feeding process.

Referring to fig. 6 and 9, the third clamping device 410 is similar to the first clamping device 220 in structure and includes a second fixed clamping die 414, a second movable clamping die 413, a second mounting seat 411 and an eighth driving device 412, and the specific arrangement is not described.

Referring to fig. 9, the seventh driving device 430 includes a third motor 431 and a nut 432, the third motor 431 has a threaded shaft 4311, the nut 432 is mounted on the second mounting seat 411, and the threaded shaft 4311 is in transmission connection with the nut 432, so that the seventh driving device 430 can drive the third clamping device 410 to slide.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. U pipe make-up machine, its characterized in that includes:

   a frame (100);

   a first assembly provided on the frame (100), the first assembly having a first gripping device (220), the first gripping device (220) for gripping an end of a tubular (600);

   the second assembly (300) is arranged on the rack (100) and located on one side of the first assembly, the second assembly (300) comprises a profiling (340) and a second clamping device (330), the profiling (340) and the second clamping device (330) are configured to be capable of rotating relative to the first assembly, and the second clamping device (330) is used for clamping the other end of the pipe (600).
2. 2. A U-tube forming machine according to claim 1, characterized in that the second assembly (300) further comprises a first driving device (310) and a connecting plate (320), the first driving device (310) is arranged on the frame (100), one end of the connecting plate (320) is in transmission connection with the first driving device (310), and the second clamping device (330) and the profile (340) are arranged on the connecting plate (320).
3. 3. The U-tube forming machine according to claim 2, wherein the second clamping device (330) comprises a clamping jaw (333), a clamping sleeve (332) and a second driving device (331), the second driving device (331) is mounted on the connecting plate (320), the clamping jaw (333) is mounted on the connecting plate (320), the clamping sleeve (332) is in transmission connection with the second driving device (331), the clamping sleeve (332) is provided with a first through hole (3321), the clamping jaw (333) is provided with a second through hole (3331), one end of the clamping jaw (333) is provided with a clamping part (3332), the clamping part (3332) is provided with a round tube shape, a plurality of first notches are formed on the clamping part (3332), and the clamping part (3332) is inserted into the first through hole (3321).
4. 4. A U-tube forming machine according to claim 3, characterized in that the second assembly (300) further comprises a core rod (350), the core rod (350) is inserted into the second through hole (3331) and then inserted into the tube (600), a first moving mechanism (360) is disposed on the connecting plate (320), the first moving mechanism (360) has a first output end (362), the first output end (362) can slide relative to the connecting plate (320), and one end of the core rod (350) is mounted on the first output end (362).
5. 5. A U-tube forming machine according to claim 1, characterized in that the first assembly further comprises a forming device (210), the forming device (210) being used for bending forming of a tube (600), the forming device (210) being arranged on the frame (100) between the first clamping device (220) and the second clamping device (330).
6. 6. A U-tube forming machine according to claim 1, characterized in that the first assembly further comprises a cutting device (230), the cutting device (230) being adapted to cut a tube (600).
7. 7. The U-tube forming machine according to claim 6, wherein the cutting device (230) comprises a fourth driving device (231), a knife rest (235) and an inner cutter (236), the fourth driving device (231) is mounted on the frame (100), the knife rest (235) is disposed on one side of the first clamping device (220), the inner cutter (236) is disposed on the knife rest (235), the inner cutter (236) is sleeved on the tube (600), and the fourth driving device (231) can drive the knife rest (235) to drive the inner cutter (236) to cut the tube (600).
8. 8. The U-tube forming machine according to claim 7, wherein the cutting device (230) further comprises a first connecting shaft (232), a second connecting shaft (234), and an eccentric device (233), the first connecting shaft (232) is in transmission connection with the fourth driving device (231), one end of the eccentric device (233) is connected with the first connecting shaft (232), the other end of the eccentric device (233) is connected with one end of the second connecting shaft (234) so that the second connecting shaft (234) eccentrically rotates relative to the first connecting shaft (232), and the other end of the second connecting shaft (234) is connected with the tool holder (235).
9. 9. The U-tube forming machine according to claim 8, wherein the eccentric device (233) comprises a sliding shaft (2331), a sliding seat (2332) and a limiting block (2333), one end of the sliding seat (2332) is connected with the first connecting shaft (232), the other end of the sliding seat (2332) is connected with the limiting block (2333), a third through hole (23321) is formed in the sliding seat (2332), the sliding shaft (2331) is slidably arranged in the third through hole (23321), a fourth through hole (23331) is formed in the limiting block (2333), an interface (23311) is formed in one end of the sliding shaft (2331), the interface (23311) is obliquely arranged relative to the axis of the sliding shaft (2331), the interface (23311) can penetrate through the third through hole (23321) and the fourth through hole (23331), a sliding groove (23332) is formed in one end of the limiting block (2333) connected with the sliding seat (2332), one end of the second connecting shaft (234) is slidably arranged in the sliding groove (23332) and is inserted into the interface (23311) in a relatively sliding manner.
10. 10. A U-tube forming machine according to claim 9, characterized in that said first assembly is further provided with a second moving mechanism (240), said second moving mechanism (240) being provided on said frame (100), said second moving mechanism (240) being able to drive said sliding shaft (2331) to slide in said third through hole (23321) to slide said second connecting shaft (234) in said sliding slot (23332) through said interface (23311).

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