CN120460925A

CN120460925A - A laser cutting device and method for aluminum alloy pipes used in the production of children's strollers

Info

Publication number: CN120460925A
Application number: CN202510807551.7A
Authority: CN
Inventors: 万常明; 刘国荣; 李明; 陈志芳; 贺淑娜; 刘俊国
Original assignee: Hebei Yingbao Children Toys Co ltd
Current assignee: Hebei Yingbao Children Toys Co ltd
Priority date: 2025-06-17
Filing date: 2025-06-17
Publication date: 2025-08-12
Anticipated expiration: 2045-06-17
Also published as: CN120460925B

Abstract

The invention relates to the technical field of laser cutting, in particular to an aluminum alloy pipe laser cutting device and method for production of a child trolley. The automatic cutting device comprises a mounting frame, a controller, a cutting robot, conveying rollers, fixing plates, sliding frames, clamping rollers, double-shaft air cylinders, telescopic rods and first electric push rods, wherein the controller is arranged on the side face of the mounting frame, the cutting robot is arranged on the mounting frame, the conveying rollers are uniformly and rotatably connected to the mounting frame at intervals, the fixing plates are symmetrically connected to two sides of the mounting frame, the sliding frames are slidably connected to the fixing plates, the clamping rollers are rotatably connected to the sliding frames, the double-shaft air cylinders are symmetrically arranged on the top of the mounting frame, the telescopic rods of the double-shaft air cylinders are connected with the sliding frames, and the first electric push rods are symmetrically arranged on two sides of the mounting frame. According to the invention, through the cooperation of the conveying roller, the clamping roller and the first electric roller, U-shaped pipes with different diameters can be automatically clamped, meanwhile, through the effect of the first electric roller, the automatic conveying and overturning of the U-shaped pipes can be realized, manual intervention is not needed, the clamping time is obviously shortened, and the production efficiency is improved.

Description

Aluminum alloy pipe laser cutting device and method for production of children trolley

Technical Field

The invention relates to the technical field of laser cutting, in particular to an aluminum alloy pipe laser cutting device and method for production of a child trolley.

Background

In the production process of the children handcart, the aluminum alloy pipe is widely used because of the advantages of light weight, high strength, corrosion resistance and the like, wherein a large number of parts are in a U-shaped structure. These U-shaped aluminum alloy tubing typically require punching or other shaped processing by laser cutting prior to assembly to meet subsequent connection and assembly requirements, however, conventional laser cutting devices have limitations in processing U-shaped tubing.

The traditional laser cutting device is mostly suitable for clamping and processing straight or simple-profile pipes, is difficult to directly adapt to the pipes with special-shaped structures such as U-shaped structures, and special fixtures are usually required to be additionally arranged for processing the U-shaped pipes. However, these clamps generally have only a fixing function, lack an automatic turning ability, and when the cutting operation of one side of the U-shaped pipe is completed, the operator must manually remove and reinstall the U-shaped pipe to the other side, so that the machining can be continued. The process not only can increase the labor cost, but also can reduce the production efficiency, and frequent manual intervention easily brings positioning errors, and influences the processing precision and the product consistency.

Disclosure of Invention

In view of the above, the invention provides a device and a method for cutting aluminum alloy pipes for producing children's carts, which can overcome the defects that the traditional laser cutting device generally needs to be additionally provided with special clamps when processing U-shaped pipes, the clamps lack automatic overturning capability, the U-shaped pipes need to be overturned manually, the operation is troublesome, and the production efficiency is affected.

The technical scheme is that the aluminum alloy pipe laser cutting device and method for producing the children handcart comprises a mounting frame, a controller, a cutting robot, conveying rollers, fixing plates, sliding frames, clamping rollers, double-shaft cylinders, telescopic rods, first electric pushing rods, first connecting rods, first electric rollers and conveying components, wherein the controller is arranged on the side face of the mounting frame, the cutting robot is arranged on the mounting frame, the conveying rollers are uniformly and rotatably connected to the mounting frame at intervals, the fixing plates are symmetrically connected to two sides of the mounting frame, the sliding frames are slidably connected to the fixing plates, the clamping rollers are rotatably connected to the sliding frames, the double-shaft cylinders are symmetrically arranged on the tops of the mounting frame, the telescopic rods of the double-shaft cylinders are connected with the sliding frames, the first electric pushing rods are symmetrically arranged on two sides of the mounting frame, the first connecting rods are connected to the telescopic rods of the first electric pushing rods, the first electric rollers are arranged on the first connecting rods, and the conveying components are arranged on the mounting frame and are used for conveying U-shaped pipes.

The conveying assembly comprises a first electric push rod, a first connecting rod, a first electric roller, a second electric roller and a rotating mechanism, wherein the first electric push rod is symmetrically arranged on two sides of a mounting frame, the connecting column is connected to a telescopic rod of the first electric push rod, the first connecting rod is rotatably connected to the connecting column, the first electric roller is arranged on the first connecting rod, and the rotating mechanism is arranged on the connecting column and used for controlling the first connecting rod to rotate.

Optionally, the rotating mechanism comprises a first driving motor and an L-shaped connecting rod, wherein the first driving motor is arranged at the top of the connecting column, the L-shaped connecting rod is connected to an output shaft of the first driving motor, and the end part of the L-shaped connecting rod is fixedly connected with the second connecting rod.

Optionally, the device also comprises a fixing seat symmetrically connected to the mounting frame; the device comprises a fixed seat, a rotating rod, torsion springs, connecting plates and limiting components, wherein the rotating rod is rotationally connected to the fixed seat, the torsion springs are symmetrically wound at two ends of the rotating rod, the two ends of each torsion spring are respectively connected with the fixed seat and the rotating rod, the connecting plates are connected to the rotating rod, and the limiting components are arranged on the fixed seat and are used for limiting the rotating rod.

Optionally, the limiting assembly comprises a connecting block and a stop block, wherein the connecting block is symmetrically connected to the rotating rod, the stop block is connected to the fixed seat, and the stop block is in contact fit with the connecting block.

Optionally, the automatic cutting machine further comprises a fixed frame connected to the cutting robot, a third electric push rod arranged in the fixed frame, a second driving motor connected to the fixed frame in a sliding mode, the top of the second driving motor is connected with a telescopic rod of the third electric push rod, and a polishing wheel connected to an output shaft of the second driving motor.

Optionally, the painting brush also comprises a fixing block connected to the side face of the fixing frame, a sleeve connected to the fixing block, a painting brush placed in the sleeve, and a fastening bolt connected to the side face of the sleeve in a threaded manner, wherein the end part of the fastening bolt is in contact fit with the painting brush.

The U-shaped tube clamping device has the beneficial effects that 1, through the cooperation of the conveying roller, the clamping roller and the first electric roller, U-shaped tubes with different diameters can be automatically clamped, meanwhile, through the effect of the first electric roller, the automatic conveying and overturning of the U-shaped tubes can be realized, manual intervention is not needed, the clamping time is obviously shortened, and the production efficiency is improved.

2. According to the invention, the dynamic positioning assembly can be formed by the rotating rod, the torsion spring and the connecting plate, the initial position of the U-shaped pipe is limited by the connecting plate at the beginning, the moving distance of the U-shaped pipe is ensured to be accurately controlled by the first electric roller, when the U-shaped pipe moves, the connecting plate can be turned down to be attached to the bottom of the U-shaped pipe, the movement of the U-shaped pipe is not influenced, and then the connecting plate can be ensured to be reset to a vertical state by the cooperation of the stop block and the connecting block.

3. According to the invention, the grinding wheel and the painting brush are integrated on the fixed frame, the painting brush is used for blackening the processing part before cutting, the laser reflection damage prevention device is used for pushing the grinding wheel to grind and deburr the end part or the inner wall of the hole of the U-shaped pipe by the third electric push rod after cutting, the cutting and grinding integration is realized, the subsequent procedures are reduced, and the smoothness and the safety of the pipe assembly surface are improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the installation of the carriage, clamping roller and biaxial cylinder of the present invention.

Fig. 3 is a schematic installation view of the first connecting rod and the first motorized pulley of the present invention.

Fig. 4 is a schematic view showing the installation of the connecting post, the second connecting rod and the second motorized pulley according to the present invention.

Fig. 5 is a schematic view showing three processing states of the U-shaped pipe of the present invention.

Fig. 6 is a schematic installation view of the fixing base of the present invention.

FIG. 7 is a schematic view of the installation of the rotating lever, torsion spring, connecting plate, connecting block and stop of the present invention.

Fig. 8 is a schematic installation view of the fixing frame of the present invention.

Fig. 9 is a cross-sectional view of a fixing frame of the present invention.

FIG. 10 is a schematic view of the installation of the mounting block, sleeve, brush and fastening bolt of the present invention.

The drawing shows that the drawing comprises a 001-U-shaped pipe, a 1-mounting rack, a 2-controller, a 3-cutting robot, a 4-conveying roller, a 5-fixing plate, a 6-sliding rack, a 7-clamping roller, an 8-double-shaft air cylinder, a 9-first electric push rod, a 10-first connecting rod, a 11-first electric roller, a 12-second electric push rod, a 13-connecting column, a 14-second connecting rod, a 15-second electric roller, a 16-first driving motor, a 17-L-shaped connecting rod, a 18-fixing seat, a 19-rotating rod, a 20-torsion spring, a 21-connecting plate, a 22-connecting block, a 23-stop block, a 24-fixing frame, a 25-third electric push rod, a 26-second driving motor, a 27-grinding wheel, a 28-fixing block, a 29-sleeve, a 30-painting brush and a 31-fastening bolt.

Detailed Description

Examples: the utility model provides an aluminum alloy tubular product laser cutting device and method for children handcart production, as shown in fig. 1-5, including mounting bracket 1, the controller 2, cutting robot 3, carry cylinder 4, fixed plate 5, carriage 6, centre gripping cylinder 7, biax cylinder 8, first electric putter 9, head rod 10, first electric cylinder 11 and conveying component, the controller 2 is installed at the front side right part of mounting bracket 1, cutting robot 3 is installed to the middle part rear side of mounting bracket 1, the upper portion of mounting bracket 1 is rotated from a left side to the even interval in right side and is connected with a plurality of carry cylinder 4, the equal bilateral symmetry in front and back both sides upper portion of mounting bracket 1 is connected with fixed plate 5, the quantity of fixed plate 5 is four, equal sliding connection has carriage 6 on four fixed plate 5, all rotate on four carriage 6 and be connected with centre gripping cylinder 7, biax cylinder 8 is all installed to the left and right sides at mounting bracket 1 top, the telescopic link of biax cylinder 8 front and back both sides is connected with carriage 6 respectively, first electric putter 9 is all installed to the upper left side of both sides of mounting bracket 1 front and back both sides, the head rod 9 is equipped with head rod 10 and is located one of them and carries out the head rod 11 on the conveying component, the head rod 11 is located on the first electric cylinder 11.

As shown in fig. 1 and 4, the conveying assembly comprises a second electric push rod 12, a connecting column 13, a second connecting rod 14, a second electric roller 15 and a rotating mechanism, wherein the second electric push rod 12 is installed on the right side of the upper part of the front side and the rear side of the installation frame 1, the connecting columns 13 are connected to telescopic rods of the two second electric push rods 12, the second connecting rods 14 are connected to the two connecting columns 13 in a rotating mode, the second electric roller 15 is installed on the two second connecting rods 14, the second electric roller 15 is also located right above one conveying roller 4, the rotating mechanism for controlling the second connecting rods 14 to rotate is arranged on the connecting column 13, the rotating mechanism comprises a first driving motor 16 and an L-shaped connecting rod 17, the first driving motors 16 are installed at the tops of the two connecting columns 13, L-shaped connecting rods 17 are connected to output shafts of the two first driving motors 16, and the lower ends of the L-shaped connecting rods 17 are connected to the tops of the second connecting rods 14.

In the initial state, when the U-shaped tube 001 is required to be cut by laser, firstly, the opening of the U-shaped tube 001 is arranged at the top of the conveying roller 4 towards the right, the right end of the lower part of the U-shaped tube 001 is positioned below the first electric roller 11, then, the first electric push rod 9 is controlled by the controller 2 to drive the first connecting rod 10 to move downwards, the first connecting rod 10 drives the first electric roller 11 to move downwards, so that the first electric roller 11 and the conveying roller 4 can clamp the upper side and the lower side of the U-shaped tube 001 in a matched manner, meanwhile, the controller 2 can control the sliding frame 6 on the front side and the rear side of the left side to move towards one side close to each other, the sliding frame 6 drives the clamping rollers 7 on the front side and the rear side to move towards one side close to each other, so that the two clamping rollers 7 can clamp the front side and the rear side of the U-shaped tube 001, and the two clamping rollers 4 can move through the conveying roller 4, The clamping roller 7 and the first electric roller 11 are used for fixing and limiting the U-shaped pipe 001; then the controller 2 controls the first motorized pulley 11 to start working, the first motorized pulley 11 can drive the U-shaped tube 001 to move to the right for a designated distance through the friction force between the first motorized pulley 11 and the U-shaped tube 001, the U-shaped tube 001 can drive the conveying pulley 4 and the clamping pulley 7 to rotate through the friction force between the first motorized pulley and the conveying pulley 4 and the clamping pulley 7, the rotation of the conveying pulley 4 and the clamping pulley 7 can assist the U-shaped tube 001 to move to the right, and then the controller 2 can control the cutting robot 3 to perform laser cutting and punching at a designated position at the lower part of the U-shaped tube 001; when the arc part of the U-shaped pipe 001 moves between the conveying roller 4 and the first motorized roller 11, the first motorized roller 11 can drive the U-shaped pipe 001 to turn over by the friction force between the first motorized roller and the U-shaped pipe 001, so that the opening of the U-shaped pipe 001 faces upwards (as shown in the middle part of fig. 5), the cutting robot 3 can perform laser cutting and punching on the designated position on the U-shaped pipe 001 by repeating the operation, when the next arc part of the U-shaped pipe 001 moves between the conveying roller 4 and the first motorized roller 11, the first motorized roller 11 can drive the U-shaped pipe 001 to continue turning over by the friction force between the first motorized roller 11 and the U-shaped pipe 001, so that the opening of the U-shaped pipe 001 faces leftwards (as shown in the lower part of fig. 5), at the moment, the controller 2 can control the first driving motor 16 to drive the L-shaped connecting rod 17 to horizontally rotate ninety degrees, the L-shaped connecting rod 17 drives the second connecting rod 14 and the second motorized roller 15 to horizontally rotate ninety degrees, so that the two second motorized rollers 15 are folded (as shown in fig. 4), and then the controller 2 can control the second motorized rod 12 to drive the connecting column 13 to move downwards, the connecting post 13 drives the second connecting rod 14 and the second electric roller 15 to move downwards, so that the second electric roller 15 and the conveying roller 4 can be matched to clamp the upper side and the lower side of the U-shaped pipe 001, meanwhile, the controller 2 can control the double-shaft air cylinder 8 on the right side to drive the sliding frame 6 on the front side and the rear side to move towards one side close to each other, the sliding frame 6 drives the clamping rollers 7 on the front side and the rear side to move towards one side close to each other, the two clamping rollers 7 can be matched to clamp the front side and the rear side of the U-shaped pipe 001, and the U-shaped pipe 001 can be clamped through the conveying roller 4, The clamping roller 7 and the second electric roller 15 are used for fixing and limiting the U-shaped pipe 001, then the controller 2 can control the first electric roller 11 and the left clamping roller 7 to loosen the U-shaped pipe 001, at the moment, the controller 2 can control the second electric roller 15 to start working, the second electric roller 15 can drive the U-shaped pipe 001 to move right for a specified distance through friction force between the second electric roller 15 and the U-shaped pipe 001, the cutting robot 3 is convenient for processing the U-shaped pipe 001, and the U-shaped pipe 001 is also convenient for moving right to discharge.

As shown in fig. 6 and 7, the device further comprises a fixed seat 18, a rotating rod 19, a torsion spring 20, a connecting plate 21 and a limiting component, wherein the fixed seat 18 is symmetrically connected to the front and back of the left side of the upper portion of the mounting frame 1, the rotating rod 19 is rotationally connected between the two fixed seats 18, the torsion spring 20 is wound around the front and back ends of the rotating rod 19, the two ends of the torsion spring 20 are respectively connected with the fixed seat 18 and the rotating rod 19, the connecting plate 21 is connected to the middle of the top of the rotating rod 19, the limiting component for limiting the rotating rod 19 is arranged on the fixed seat 18, the limiting component comprises a connecting block 22 and a stop block 23, the connecting block 22 is symmetrically connected to the front and back of the right side of the rotating rod 19, the stop blocks 23 are connected to the tops of the two fixed seats 18, and the stop block 23 is in contact fit with the connecting block 22.

When the U-shaped pipe 001 moves rightwards, the connecting plate 21 drives the rotating rod 19 and the connecting block 22 to rotate, the torsion spring 20 deforms, the connecting block 22 is separated from the stop block 23, at the moment, the connecting plate 21 is always attached to the bottom of the U-shaped pipe 001 under the action of the elasticity of the torsion spring 20, when the U-shaped pipe 001 is separated from the connecting plate 21, the torsion spring 20 drives the rotating rod 19 to reversely reset, the rotating rod 19 drives the connecting plate 21 and the connecting block 22 to reversely reset until the connecting block 22 contacts the stop block 23, and the stop block 23 can limit the rotating rod 19 to ensure that the connecting plate 21 is in a vertical state.

As shown in fig. 8 and 9, the utility model further comprises a fixed frame 24, a third electric putter 25, a second driving motor 26 and a polishing wheel 27, the fixed frame 24 is connected on the cutting robot 3, the bottom of the fixed frame 24 is of an open type design, the third electric putter 25 is mounted on the upper side of the inside of the fixed frame 24, the second driving motor 26 is slidingly connected with the lower side of the inside of the fixed frame 24, the top of the second driving motor 26 is connected with the telescopic rod of the third electric putter 25, the polishing wheel 27 is connected with the output shaft of the second driving motor 26, the diameter of the polishing wheel 27 is gradually reduced from top to bottom, and the polishing wheel 27 is convenient to extend into the mounting hole on the U-shaped pipe 001 for polishing.

When the U-shaped pipe 001 moves to the right for a specified distance, the controller 2 can control the second driving motor 26 to drive the grinding wheel 27 to rotate, and control the third electric push rod 25 to drive the second driving motor 26 to move downwards, the second driving motor 26 drives the grinding wheel 27 to move downwards to extend out of the bottom of the fixed frame 24, then the cutting robot 3 controls the grinding wheel 27 to move to the end part of the U-shaped pipe 001, the end part of the U-shaped pipe 001 can be ground and chamfered, burrs of the end part of the U-shaped pipe 001 are removed, after finishing grinding, the controller 2 can control the second driving motor 26 to stop working, the grinding wheel 27 stops rotating, and control the third electric push rod 25 to drive the second driving motor 26 to move upwards for resetting, the second driving motor 26 drives the grinding wheel 27 to move upwards for resetting for retracting into the fixed frame 24, so that the influence of the grinding wheel 27 on the subsequent processing of the U-shaped pipe 001 by the cutting robot 3 can be prevented, and similarly, after the mounting hole is cut by the cutting robot 3 on the U-shaped pipe 001, the inner wall of the mounting hole can be ground by the grinding wheel 27, and burrs of the inner wall of the mounting hole are removed.

As shown in fig. 10, the painting brush further comprises a fixing block 28, a sleeve 29, a painting brush 30 and a fastening bolt 31, the front side of the fixing frame 24 is connected with the fixing block 28, the front side of the fixing block 28 is connected with the sleeve 29, the painting brush 30 is placed in the sleeve 29, the middle of the front side of the sleeve 29 is connected with the fastening bolt 31 in a threaded manner, and the rear end of the fastening bolt 31 is in contact with the surface of the painting brush 30.

Before the cutting robot 3 processes the designated position of the U-shaped pipe 001, the cutting robot 3 controls the painting brush 30 to move to the designated position of the U-shaped pipe 001, and controls the painting brush 30 to blacken the designated position of the U-shaped pipe 001, and then the cutting robot 3 processes the designated position of the U-shaped pipe 001, so that the laser emitted by the cutting robot 3 can be reflected on the surface of the U-shaped pipe 001, and the cutting robot 3 is protected from damage.

Claims

1. The aluminum alloy pipe laser cutting device for the production of the children handcart comprises a mounting frame (1), a cutting robot (3) mounted on the mounting frame (1), and is characterized by further comprising a controller (2) mounted on the side face of the mounting frame (1), conveying rollers (4) uniformly and rotatably connected to the mounting frame (1) at intervals, fixing plates (5) symmetrically connected to two sides of the mounting frame (1), sliding frames (6) slidably connected to the fixing plates (5), clamping rollers (7) rotatably connected to the sliding frames (6), double-shaft air cylinders (8) symmetrically mounted on the top of the mounting frame (1), telescopic rods of the double-shaft air cylinders (8) are connected with the sliding frames (6), first electric push rods (9) symmetrically mounted on two sides of the mounting frame (1), first connecting rods (10) connected to the telescopic rods of the first electric push rods (9), first electric rollers (11) mounted on the first connecting rods (10), and conveying assemblies arranged on the mounting frame (1) and used for conveying U-shaped pipes (001).

2. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 1 is characterized in that the conveying assembly comprises second electric pushing rods (12), connecting columns (13), second connecting rods (14), second electric rollers (15) and rotating mechanisms, wherein the second electric pushing rods (12) are symmetrically arranged on two sides of the installation frame (1), the connecting columns (13) are connected to telescopic rods of the second electric pushing rods (12), the second connecting rods (14) are rotatably connected to the connecting columns (13), the second electric rollers (15) are arranged on the second connecting rods (14), and the rotating mechanisms are arranged on the connecting columns (13) and used for controlling the second connecting rods (14) to rotate.

3. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 2, wherein the rotating mechanism comprises a first driving motor (16) and an L-shaped connecting rod (17), the first driving motor (16) is arranged at the top of the connecting column (13), the L-shaped connecting rod (17) is connected to an output shaft of the first driving motor (16), and the end part of the L-shaped connecting rod (17) is fixedly connected with the second connecting rod (14).

4. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 1 is characterized by further comprising a fixed seat (18) symmetrically connected to the mounting frame (1), a rotating rod (19) rotationally connected to the fixed seat (18), torsion springs (20) symmetrically wound around two ends of the rotating rod (19), two ends of each torsion spring (20) respectively connected with the fixed seat (18) and the rotating rod (19), a connecting plate (21) connected to the rotating rod (19), and a limiting assembly arranged on the fixed seat (18) and used for limiting the rotating rod (19).

5. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 4 is characterized in that the limiting component comprises a connecting block (22) symmetrically connected to a rotating rod (19), a stop block (23) connected to a fixed seat (18), and the stop block (23) is in contact fit with the connecting block (22).

6. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 1 is characterized by further comprising a fixed frame (24) connected to the cutting robot (3), a third electric push rod (25) arranged inside the fixed frame (24), a second driving motor (26) connected to the inside of the fixed frame (24) in a sliding mode, the top of the second driving motor (26) is connected with a telescopic rod of the third electric push rod (25), and a polishing wheel (27) connected to an output shaft of the second driving motor (26).

7. The aluminum alloy pipe laser cutting device for producing the children handcart according to claim 6 is characterized by further comprising a fixed block (28) connected to the side face of the fixed frame (24), a sleeve (29) connected to the fixed block (28), a painting brush (30) placed in the sleeve (29), and a fastening bolt (31) connected to the side face of the sleeve (29) in a threaded mode, wherein the end portion of the fastening bolt (31) is in contact fit with the painting brush (30).

8. A method for using an aluminum alloy pipe laser cutting device for children's barrow production according to claim 3, characterized by comprising the steps of firstly placing an opening of a U-shaped pipe (001) towards the right at the top of a conveying roller (4), enabling the right end of the lower part of the U-shaped pipe (001) to be positioned below a first electric roller (11), then controlling the first electric roller (11) to drive a first connecting rod (10) and the first electric roller (11) to move downwards through a controller (2), enabling the first electric roller (11) to clamp the upper side and the lower side of the U-shaped pipe (001) in a matched mode through the conveying roller (4), simultaneously controlling a sliding frame (6) and a clamping roller (7) on the front side and the rear side to move towards one side close to each other through a controller (2), enabling the two clamping rollers (7) to clamp the front side and the rear side of the U-shaped pipe (001) in a matched mode, controlling the first electric roller (11) to start working through the controller (2), enabling the first electric roller (11) to move towards the designated position of the U-shaped pipe (001) through the laser cutting device (001) to move towards the designated position, and then controlling the laser cutting machine to cut the U-shaped pipe to move towards the designated position, when the arc-shaped part of the U-shaped pipe (001) moves to a position between the conveying roller (4) and the first electric roller (11), the first electric roller (11) can drive the U-shaped pipe (001) to overturn through friction force between the first electric roller and the U-shaped pipe (001), so that the cutting robot (3) can perform laser cutting and punching at other appointed positions of the U-shaped pipe (001).