A welding device for bending metal pipes and its working method

Abstract

This invention discloses a welding device and its working method for bending metal pipes, specifically relating to the field of pipe bending welding technology. The invention involves loading a straight metal pipe and a bent metal pipe into a slide and a clamping base, respectively. Clamping jaws position the straight metal pipe, and clamping jaws position the middle of the bent metal pipe. The slide and clamping base then move the straight and bent metal pipes closer together, and a laser welding head welds the upper half of the weld seam. A rotating disk drives the straight metal pipe in clamping jaws to rotate half a circle. The rotation of clamping jaws is synchronized with the rotation axis of the rotating disk. The straight and bent metal pipes rotate synchronously during clamping, dispersing welding stress, improving welding quality, and preventing deviation of the steel pipe axis, thus completing the welding of the entire weld seam. The positioning of the straight and bent metal pipes is released, and bases one and two descend to the same height as the conveyor belt. With the conveyor belt, the material is automatically discharged, making discharge more convenient.

Description

Technical Field

[0001] This invention relates to the field of pipe bending welding technology, specifically to a welding device for bending metal pipes and its working method. Background Technology

[0002] Petrochemical pipelines, automotive exhaust pipes, boiler tubes, heat exchanger pipes, and many other applications require numerous pipe bends. Metal bends have wide applications in industrial production, and their welding quality directly affects product performance and lifespan. However, due to the special shape of bends, problems such as deformation and cracking are prone to occur during the welding process.

[0003] A search revealed that utility model patent CN217913751 U discloses a pipe bending and welding device for metal product processing, which solves the problem that current positioning fixtures can only engage pipes with one angle and cannot adapt to pipes with different angles. Different pipes require different fixtures, which increases production costs.

[0004] In existing solutions, the welding of metal bends is mostly done manually by installing the bend onto a fixture, then fitting the metal bend workpiece to the pipe to be welded, and welding the weld seam by rotating the welding head in a circle. However, this method relies on manual loading, and the welded workpiece is not easy to remove from the weld position. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for bending metal pipes and its working method to solve the problems mentioned in the background art.

[0006] The main technical problem solved by this invention is:

[0007] The existing solution relies on manual loading, and the method of welding the weld seam by rotating the welding head in a circle makes it difficult to remove the material from the weld position.

[0008] This invention can be achieved through the following technical solutions:

[0009] A welding device for bending metal pipes, comprising a welding chamber,

[0010] The laser welding head is positioned in the middle of the inner cavity of the welding chamber.

[0011] One feed inlet is located on one side of the welding chamber and is used to transport straight metal pipes;

[0012] The second inlet is located on the other side of the welding chamber and is used to transport metal bends.

[0013] The transfer chamber is located at the ends of inlet one and inlet two;

[0014] The pushing component is located inside the welding chamber and is used to push straight metal pipes and bent metal pipes into the corresponding transfer chamber.

[0015] The adjustment seat is located at the bottom of the inner cavity of the welding chamber;

[0016] Rotary docking unit one is slidably mounted on one side of the upper part of the adjusting seat and positions the metal straight tube;

[0017] Rotary docking unit two is slidably located on the other side of the upper part of the adjusting seat and positions the metal bend; positioning and transfer unit is lifted and installed in the transfer chamber and moves the straight metal tube and the bent metal tube to rotary docking unit one and rotary docking unit two. The positioning and transfer unit includes two sliding transfer blocks.

[0018] The rotating docking unit includes a slide, in which a base supporting a straight metal tube is installed in a lifting manner, and a rotating disk is rotatably installed on one side of the slide. A gripper for limiting the end of the straight metal tube is installed on the surface of the rotating disk.

[0019] The rotating docking unit 2 includes a clamping seat 1, in which a base 2 supporting a metal bend is installed in a lifting manner, and a clamping claw 2 that limits the middle part of the metal bend is rotatably provided in the clamping seat 1. The clamping claw 2 is collinear with the rotation axis of the rotating disk.

[0020] The inner cavity of the welding chamber is equipped with a conveyor belt that is lower than the initial height of base one and base two.

[0021] A further technical improvement of the present invention is that: the pushing assembly includes a driving cavity located at the top of the inner cavity of the welding chamber, an electric push rod is installed inside the driving cavity, and the bottom surface of the driving cavity is provided with an inclined platform, and the middle surface of the inclined platform is provided with a notch;

[0022] The pushing end of the electric push rod is connected to a positioning frame that slides along the track inside the drive cavity. A sliding plate is movably installed inside the positioning frame. A push block that protrudes outward and slides in a notch is provided in the middle of the bottom surface of the sliding plate. A fitting part that mates with the inclined surface on the inclined platform is provided on one side of the bottom of the sliding plate.

[0023] A further technical improvement of the present invention is that: the sliding plate extends into the interior of the positioning frame and is connected to an elastic element, and one side of the inner cavity of the driving cavity is provided with a movable groove that communicates with the notch.

[0024] A further technical improvement of the present invention is that: the positioning and transfer unit includes a transfer plate, and the top surface of the transfer plate is provided with an electric push rod II installed inside the welding chamber, and the transfer block is slidably installed on the transfer plate.

[0025] A further technical improvement of the present invention is that: a sleeve is installed on the lower end face of both the slide and the clamp; the interior of the adjusting seat is provided with two threaded rods driven by the same dual-axis motor, and each threaded rod is threadedly connected to the sleeve on the corresponding side.

[0026] An L-shaped connecting frame is installed on one side of the slide, and the rotating disk is rotatably mounted on the inner side of the connecting frame.

[0027] A further technical improvement of the present invention is that: the upper surface of the base is provided with a placement groove;

[0028] The upper surface of the base is provided with a matching groove, and the middle of the curved section of the matching groove is provided with an adapter groove through the edge. The matching groove and the placement groove are the same size.

[0029] A further technical improvement of the present invention is that: an electric push rod three is installed on the bottom surface of both the base two and the base one, and the electric push rod three is installed inside the clamping seat one and the slide seat.

[0030] A further technical improvement of the present invention is that: the top surface of the clamping seat one is provided with a receiving cavity, and an electric push rod four is installed inside the receiving cavity. The pushing end of the electric push rod four is fixed to the clamping jaw two through a rotary motor.

[0031] A further technical improvement of the present invention is that: a discharge port is provided on the bottom front side of the welding chamber, and the conveyor belt passes through the interior of the discharge port.

[0032] A method for operating a welding device for bending metal pipes, the method comprising the following steps:

[0033] Step 1: The straight metal tube is conveyed through inlet 1 and the bent metal tube is conveyed through inlet 2. After being pushed by the pushing component, the straight metal tube and the bent metal tube are pushed into the positioning and transfer unit in the corresponding side transfer bin to complete the automatic feeding.

[0034] Step 2: The electric push rods on both sides push the straight metal tube and the bent metal tube into the rotating docking unit 1 and the rotating docking unit 2 respectively, and fix them by the clamps 1 and 2. Then, by the approach of the slide and the clamp 1, the straight metal tube and the bent metal tube are joined together.

[0035] Step 3: Weld the upper half of the weld seam of the straight metal pipe and the bent metal pipe with the laser welding head. Then, the height of base one and base two is lowered. Then, the rotating disk and the clamp two rotate synchronously on the same axis, and the lower half of the weld seam is flipped to the front.

[0036] Step 4: Base 1 and Base 2 rise to their initial height and re-fit with the straight and bent metal pipes. After welding, clamps 1 and 2 release their grip on the straight and bent metal pipes. Then, bases 1 and 2 descend again and carry the welded metal pipes onto the conveyor belt, completing the automatic discharge of the welded metal pipes.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. By setting up a positioning and transfer unit, a rotary docking unit one, and a rotary docking unit two, the straight metal tube and the bent metal tube are respectively loaded into the slide and clamping base one. The straight metal tube is positioned by clamping jaw one, and the middle of the bent metal tube is positioned by clamping jaw two. Then, the slide and clamping base one move towards the laser welding head, causing the straight metal tube and the bent metal tube to come closer together. The laser welding head then welds the upper half of the weld seam. Base one and base two descend synchronously within their respective slides and clamping bases. The rotating disk drives the straight metal tube in clamping jaw one to rotate half a circle, while the rotation of clamping jaw two remains aligned with the rotation axis of the rotating disk, so that the straight metal tube... The metal pipe and the bent pipe rotate synchronously during the fixed clamping process to disperse welding stress, improve welding quality, and prevent the steel pipe axis from shifting. The lower half of the weld seam rotates to the front, at which point base one and base two return to their initial height and contact the straight metal pipe and the bent metal pipe respectively. The laser welding head then welds the remaining half of the weld seam after the half-turn rotation, thus completing the welding of the entire weld seam. Claw one and claw two release their positioning of the straight metal pipe and the bent metal pipe, and base one and base two descend again to the same height as the conveyor belt. At this point, the welded metal pipe is conveyed with the conveyor belt and leaves through the discharge port, enabling automated and convenient discharge.

[0039] 2. The system employs dual-sided feeding and, through a set push assembly, the sliding plate extends into the positioning frame where the elastic element is in an elastic compression state. Then, the electric push rod extends and pushes the positioning frame to slide along the drive cavity. During the sliding process, the contact part slides along the inclined surface of the ramp. At this time, the elastic element is in a normal state, i.e., it pushes the sliding plate down. The push block then moves down and leaves the interior of the movable slot. The push block pushes the straight metal tube and the bent metal tube into the corresponding transfer chamber, assisting in pushing the metal tube workpiece and automatically feeding it. Attached Figure Description

[0040] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0042] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0043] Figure 3 This is a three-dimensional structural diagram of the inclined platform and sliding plate of the present invention;

[0044] Figure 4 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0045] Figure 5 This is a schematic diagram of the installation structure of the transfer seat and transfer compartment of the present invention;

[0046] Figure 6 This is a three-dimensional structural diagram of the gripper and base of the present invention.

[0047] Figure 7 This is a schematic diagram of the installation structure of the base one and the electric push rod three of the present invention;

[0048] Figure 8 This is a three-dimensional structural diagram of the base two and the clamp one of the present invention;

[0049] Figure 9 This is a schematic diagram of the installation structure of the gripper 2 and the base 2 of the present invention;

[0050] Figure 10 This is a connection diagram of the installation structure of the conveyor belt of the present invention.

[0051] In the diagram: 1. Welding chamber; 2. Inlet 1; 3. Inlet 2; 4. Adjusting seat; 5. Clamp 1; 6. Laser welding head; 7. Transfer chamber; 8. Drive cavity; 9. Electric push rod 1; 10. Movable groove; 11. Electric push rod 2; 12. Positioning frame; 13. Elastic element; 14. Sliding plate; 15. Inclined platform; 16. Push block; 17. Fitting part; 18. Notch; 19. Transfer block; 20. Clamp 1; 21. Slide seat; 22. Sleeve seat; 23. Connecting frame; 24. Rotating disk; 25. Base 1; 26. Placement groove; 27. Electric push rod 3; 28. Discharge port; 29. ​​Conveyor belt; 30. Base 2; 31. Matching groove; 32. Adaptor groove; 33. Receiving cavity; 34. Clamp 2; 35. Electric push rod 4. Detailed Implementation

[0052] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0053] Please see Figures 1-10As shown, the present invention provides a welding device for bending metal pipes, including a welding chamber 1. One side of the welding chamber 1 is provided with an inlet 2 for conveying straight metal pipes, and the other side of the welding chamber 1 is provided with an inlet 3 for conveying bent metal pipes. The ends of inlet 2 and inlet 3 are connected to transfer chambers 7. The inside of the welding chamber 1 is provided with a pushing component for pushing straight metal pipes and bent metal pipes into the corresponding transfer chambers 7. The bottom of the inner cavity of the welding chamber 1 is provided with an adjusting seat 4. One side of the upper part of the adjusting seat 4 is slidably provided with a rotating docking unit 1 for positioning straight metal pipes, and the other side of the upper part of the adjusting seat 4 is slidably provided with a rotating docking unit 2 for positioning bent metal pipes. The inside of the transfer chamber 7 is equipped with a positioning and transfer unit that moves straight metal pipes and bent metal pipes into the rotating docking unit 1 and the rotating docking unit 2. The positioning and transfer unit includes two sliding transfer blocks 19, and the inner wall surface of the transfer blocks 19 is in contact with the inner wall surface of the inlet 2.

[0054] The rotating docking unit includes a slide 21, a base 25 for supporting a straight metal tube is installed in the slide 21, and a rotating disk 24 is rotatably installed on one side of the slide 21. The surface of the rotating disk 24 is equipped with a gripper 20 for limiting the end of the straight metal tube.

[0055] The rotating docking unit 2 includes a clamping seat 5, a base 30 for supporting the metal bend is installed in the clamping seat 5, and a gripper 34 for limiting the middle of the metal bend is rotatably provided in the clamping seat 5. The gripper 34 is collinear with the rotation axis of the rotating disk 24.

[0056] A laser welding head 6 is raised and lowered in the middle of the inner cavity of the welding chamber 1, and a conveyor belt 29 is provided in the inner cavity of the welding chamber 1. The conveyor belt 29 is lower than the initial height of the base 1 25 and the base 2 30.

[0057] In the initial position, the first and second rotary docking units are located directly below the corresponding positioning and transfer units. The straight metal tube enters through the first inlet 2, while the bent metal tube enters through the second inlet 3. With the assistance of the pushing component, they reach the corresponding transfer chambers 7 respectively. The straight metal tube and the bent metal tube are fixed by the transfer block 19 in the transfer chamber 7. Then, the positioning and transfer unit lowers its height to position and install the straight metal tube and the bent metal tube in the first and second rotary docking units. Then, the two transfer blocks 19 open and rise back to the initial height.

[0058] The straight metal tube is positioned by clamp 20 and the middle of the bent metal tube is positioned by clamp 34. Then the slide 21 and clamp 5 move closer to each other, that is, move towards the center of the laser welding head 6, which drives the straight metal tube and the bent metal tube to come closer and fit together, and the upper half of the weld seam is welded by the laser welding head 6.

[0059] Then, base 1 25 and base 2 30 descend synchronously within their corresponding slides 21 and clamps 1 5, driving the straight metal tube in the clamp 1 20 to rotate half a turn via the rotating disk 24. The rotation of the clamp 2 34 remains aligned with the rotation axis of the rotating disk 24, ensuring that the straight metal tube and the bent metal tube rotate synchronously during fixed clamping, dispersing welding stress, improving welding quality, and preventing the steel pipe axis from shifting. Furthermore, the descending height of base 1 25 and base 2 30 does not affect the rotation action.

[0060] After the straight metal pipe and the bent metal pipe are flipped half a turn, the lower half of the weld seam is flipped to the front. At this time, the base 1 25 and the base 2 30 are restored to their initial height and contact the straight metal pipe and the bent metal pipe respectively. The laser welding head 6 welds the remaining half of the weld seam after the half-turn, thus completing the welding of the entire weld seam.

[0061] Then, grippers 20 and 34 release their positioning of the straight and bent metal pipes, and bases 25 and 30 lower their height to transfer the welded metal pipes onto the conveyor belt 29 for automated discharge. This method is completely different from the circular rotation welding in existing solutions, making discharge more convenient.

[0062] See Figure 2 and Figure 3 As shown, the pushing assembly includes a driving cavity 8 located at the top of the inner cavity of the welding chamber 1. An electric push rod 9 is installed inside the driving cavity 8, and a ramp 15 is provided on the bottom surface of the driving cavity 8. A notch 18 is provided on the middle surface of the ramp 15.

[0063] The pushing end of the electric push rod 9 is connected to a positioning frame 12 that slides along the track inside the drive cavity 8. A sliding plate 14 is movably installed inside the positioning frame 12. A push block 16 that protrudes outward and slides in the notch 18 is provided in the middle of the bottom surface of the sliding plate 14. A fitting part 17 that cooperates with the inclined surface on the inclined platform 15 is provided on one side of the bottom of the sliding plate 14.

[0064] The sliding plate 14 extends into the interior of the positioning frame 12 and is connected to an elastic element 13. The inner cavity of the drive cavity 8 is provided with a movable groove 10 that communicates with the notch 18.

[0065] In the initial position, the push block 16 is located inside the notch 18 to ensure the smooth passage of the straight metal tube and the bent metal tube. The elastic element 13 of the sliding plate 14 extends into the positioning frame 12 and is in an elastic compression state. Then, the electric push rod 9 extends and pushes the positioning frame 12 to slide along the drive cavity 8. During the sliding process, the fitting part 17 slides along the inclined surface of the ramp 15. At this time, the elastic element 13 is in the normal state, that is, it pushes the sliding plate 14 to move down. At this time, the push block 16 moves down and leaves the interior of the movable groove 10. The push block 16 pushes the straight metal tube and the bent metal tube into the corresponding transfer chamber 7.

[0066] After entering the transfer chamber 7, due to the reset of the electric push rod 9, the fitting part 17 fits against the inclined surface of the inclined platform 15, causing the sliding plate 14 to rise and enter the positioning frame 12. At this time, the push block 16 resets into the notch 18.

[0067] See Figure 4 and Figure 5 As shown, the positioning and transfer unit includes a transfer plate. The top surface of the transfer plate is provided with an electric push rod 11 installed inside the welding chamber 1. The transfer block 19 is slidably installed on the transfer plate. After the straight metal tube and the bent metal tube enter the transfer chamber 7, the transfer block 19 fixes the straight metal tube and the bent metal tube. Then, the electric push rod 11 pushes the straight metal tube and the bent metal tube in the transfer block 19 to move down to the slide 21 and the clamp 5. Then, the transfer block 19 opens and resets and rises.

[0068] See Figure 4 , Figure 6 and Figure 8 As shown, both the slide 21 and the clamp 5 are equipped with sleeves 22 on their lower end faces. The adjusting seat 4 has two threaded rods driven by the same dual-axis motor inside, and each threaded rod is threadedly connected to the sleeve 22 on the corresponding side.

[0069] Initially, slide 21 and clamp 5 are located below the two transfer chambers 7 to facilitate the loading of straight and bent metal tubes. Then, the straight and bent metal tubes in slide 21 and clamp 5 are driven to move closer by the threaded rod and are welded by the laser welding head 6 at the top.

[0070] An L-shaped connecting frame 23 is installed on one side of the slide 21. The rotating disk 24 is rotatably installed on the inner side of the connecting frame 23. Since the rotating disk 24 can rotate, the center of the rotating disk 24 is the rotation base point, changing the welding position of the metal pipe. It should be noted that the straight metal pipe and the bent metal pipe rotate synchronously, and the height of the base 1 25 and the base 2 30 decreases.

[0071] The upper surface of the base 25 is provided with a placement groove 26 for placing a straight metal tube;

[0072] The upper surface of the base 2 30 is provided with a matching groove 31 for placing a metal bent pipe. The middle to the edge of the bent section of the matching groove 31 is provided with an adapter groove 32. The matching groove 31 and the placement groove 26 have the same size and the same axis, so as to maintain the same welding specifications.

[0073] See Figure 7 As shown, electric push rods 27 are installed on the bottom surfaces of base 20 and base 25. Electric push rods 27 are installed inside clamp 1 and slide 21. Initially, base 125 and base 230 are at the same height. After welding half a circle of weld, base 125 and base 230 move down in sync.

[0074] See Figure 9 As shown, the top surface of the clamp 5 is provided with a receiving cavity 33, and an electric push rod 4 35 is installed inside the receiving cavity 33. The pushing end of the electric push rod 4 35 is fixed to the clamp 2 34 by a rotary motor.

[0075] Initially, the second gripper 34 is housed in the receiving cavity 33 and is in the open state. After the metal bent tube is placed into the matching groove 31, the electric push rod 35 pushes the opened second gripper 34 to move towards the matching groove 32. Then, the second gripper 34 restricts the middle part of the metal bent tube. The rotating motor drives the second gripper 34 to rotate half a circle, maintaining the same rotation speed as the metal straight tube.

[0076] See Figure 10 As shown, a discharge port 28 is provided on the bottom front side of the welding chamber 1. The conveyor belt 29 passes through the interior of the discharge port 28. As the base 1 25 and base 2 30 descend and drive the welded metal pipe onto the conveyor belt 29, it leaves the interior of the welding chamber 1 through the discharge port 28, thus completing the automatic discharge of the welded metal pipe.

[0077] This invention provides a method for operating a welding device for bending metal pipes, the method comprising the following steps:

[0078] Step 1: The straight metal tube is conveyed through inlet 1 2 and the bent metal tube is conveyed through inlet 2 3. After being pushed by the pushing component, the straight metal tube and the bent metal tube are pushed into the positioning and transfer unit in the corresponding side transfer chamber 7 to complete the automatic feeding.

[0079] Step 2: The electric push rods 211 on both sides push the straight metal tube and the bent metal tube into the rotating docking unit 1 and the rotating docking unit 2 respectively, and fix them by the clamps 20 and 34. Then, by the close proximity of the slide 21 and the clamp 5, the straight metal tube and the bent metal tube are joined together.

[0080] Step 3: Weld the upper half of the weld seam of the straight metal pipe and the bent metal pipe with the laser welding head 6. Then, the base 1 25 and the base 2 30 are lowered. Then, the rotating disk 24 and the clamp 2 34 rotate synchronously on the same axis, and the lower half of the weld seam is flipped to the front.

[0081] Step 4: Base 1 25 and Base 2 30 rise to their initial height and re-fit with the straight and bent metal pipes. After welding, clamps 1 20 and 2 34 release their fixation on the straight and bent metal pipes. Then, base 1 25 and Base 2 30 descend again and carry the welded metal pipes onto the conveyor belt 29, completing the automatic discharge of the welded metal pipes.

[0082] In use, the present invention employs a two-sided feeding method. Through the provided pushing component, the sliding plate 14 extends into the positioning frame 12, where the elastic element 13 is in an elastic compression state. Then, the electric push rod 9 extends and pushes the positioning frame 12 to slide along the drive cavity 8. During the sliding process, the fitting part 17 slides along the inclined surface of the ramp 15. At this time, the elastic element 13 is in a normal state, i.e., pushing the sliding plate 14 downward. At this time, the push block 16 moves downward and leaves the interior of the movable groove 10. The push block 16 pushes the straight metal tube and the bent metal tube into the corresponding transfer chamber 7. After entering the transfer chamber 7, due to the reset of the electric push rod 9, the fitting part 17 fits against the inclined surface of the ramp 15, causing the sliding plate 14 to rise and enter the positioning frame 12. At this time, the push block 16 resets to the notch 18.

[0083] By setting up a positioning and transfer unit, a rotary docking unit one, and a rotary docking unit two, straight metal tubes and bent metal tubes are loaded into slide 21 and clamp 5. Clamp 20 positions the straight metal tube, and clamp 34 positions the middle of the bent metal tube. Then, slide 21 and clamp 5 move towards the laser welding head 6, causing the straight metal tube and bent metal tube to come closer together. The laser welding head 6 then welds the upper half of the weld seam. Base 25 and base 30 simultaneously descend within their respective slides 21 and clamps 5, via a rotating disk... The metal straight tube inside the first gripper 20 rotates half a turn, while the rotation of the second gripper 34 remains consistent with the rotation axis of the rotating disk 24, so that the metal straight tube and the metal bent tube rotate synchronously when fixed and clamped, dispersing the welding stress, improving the welding quality, and preventing the steel pipe axis from shifting. The lower half of the weld seam rotates to the front, and at this time, the first base 25 and the second base 30 return to their initial height and contact the metal straight tube and the metal bent tube respectively. The laser welding head 6 welds the remaining half of the weld seam after rotating half a turn, thus completing the welding of the entire weld seam.

[0084] The grippers 20 and 34 release their positioning of the straight and bent metal pipes. The bases 25 and 30 then descend to the same height as the conveyor belt 29. At this point, the welded metal pipe is conveyed along with the conveyor belt 29 and leaves through the discharge port 28, enabling automated and more convenient discharge.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A welding device for bending metal pipes, comprising a welding chamber (1), characterized in that: The laser welding head (6) is raised and lowered in the middle of the inner cavity of the welding chamber (1); Inlet 1 (2) is located on one side of the welding chamber (1) and is used to transport straight metal pipes; Inlet 2 (3) is located on the other side of the welding chamber (1) and is used to transport metal bends; The transfer chamber (7) is located at the ends of inlet one (2) and inlet two (3); The pushing component is located inside the welding chamber (1) and is used to push straight metal pipes and bent metal pipes into the corresponding transfer chamber (7); Adjustment seat (4) is located at the bottom of the inner cavity of welding chamber (1); Rotary docking unit one is slidably located on the upper side of the adjusting seat (4) and is positioned for the metal straight tube; Rotary docking unit 2 is located on the other side of the upper part of the adjusting seat (4) and slides simultaneously with the adjusting seat (4), and positions the metal bend. The positioning and transfer unit is installed in the transfer chamber (7) and moves the straight metal tube and the bent metal tube to the rotating docking unit 1 and the rotating docking unit 2. The positioning and transfer unit includes two sliding transfer blocks (19). The rotating docking unit includes a slide (21), in which a base (25) supporting a straight metal tube is installed in a lifting manner, and a rotating disk (24) is rotatably installed on one side of the slide (21), and a gripper (20) for limiting the end of the straight metal tube is installed on the surface of the rotating disk (24). The rotating docking unit 2 includes a clamping seat 1 (5), in which a base 2 (30) supporting the metal bend is installed in a lifting manner, and a clamping claw 2 (34) that limits the middle part of the metal bend is rotatably provided in the clamping seat 1 (5), and the rotation axis of the clamping claw 2 (34) is collinear with that of the rotating disk (24). The inner cavity of the welding chamber (1) is provided with a conveyor belt (29) that is lower than the initial height of base one (25) and base two (30).

2. The welding equipment for bending metal pipes according to claim 1, characterized in that, The pushing assembly includes a driving cavity (8) located at the top of the inner cavity of the welding chamber (1). An electric push rod (9) is installed inside the driving cavity (8), and a ramp (15) is provided on the bottom surface of the driving cavity (8). A notch (18) is provided on the middle surface of the ramp (15). The pushing end of the electric push rod (9) is connected to a positioning frame (12) that slides along the track inside the drive cavity (8). A sliding plate (14) is movably installed inside the positioning frame (12). A push block (16) protrudes outward and slides in a notch (18) in the middle of the bottom surface of the sliding plate (14). A fitting part (17) is provided on one side of the bottom of the sliding plate (14) to cooperate with the inclined surface on the inclined platform (15).

3. The welding equipment for bending metal pipes according to claim 2, characterized in that, The sliding plate (14) extends into the interior of the positioning frame (12) and is connected to an elastic element (13). The inner cavity of the driving cavity (8) is provided with a movable groove (10) that communicates with the notch (18).

4. The welding equipment for bending metal pipes according to claim 3, characterized in that, The positioning and transfer unit includes a transfer plate, and the top surface of the transfer plate is provided with an electric push rod 2 (11) installed inside the welding chamber (1). The transfer block (19) is slidably installed on the transfer plate.

5. The welding equipment for bending metal pipes according to claim 4, characterized in that, Sleeves (22) are installed on the lower end faces of slide (21) and clamp (5). The interior of the adjusting seat (4) is provided with two threaded rods driven by the same dual-axis motor. Each threaded rod is threadedly connected to the sleeve (22) on the corresponding side. An L-shaped connecting frame (23) is installed on one side of the slide (21), and the rotating disk (24) is rotatably installed on the inner side of the connecting frame (23).

6. The welding equipment for bending metal pipes according to claim 5, characterized in that, The upper surface of the base (25) is provided with a placement groove (26); The upper surface of the base (30) is provided with a matching groove (31), and the middle to the edge of the curved section of the matching groove (31) is provided with an adapter groove (32). The matching groove (31) and the placement groove (26) are the same size.

7. The welding equipment for bending metal pipes according to claim 6, characterized in that, Electric push rod three (27) is installed on the bottom surface of both base two (30) and base one (25). Electric push rod three (27) is installed inside clamp one (5) and slide (21).

8. The welding equipment for bending metal pipes according to claim 7, characterized in that, The top surface of the clamping seat (5) is provided with a receiving cavity (33), and an electric push rod (35) is installed inside the receiving cavity (33). The pushing end of the electric push rod (35) is fixed to the clamping jaw (34) by a rotary motor.

9. The welding equipment for bending metal pipes according to claim 8, characterized in that, The bottom front side of the welding chamber (1) is provided with a discharge port (28), and the conveyor belt (29) passes through the interior of the discharge port (28).

10. The working method of the welding equipment for bending metal pipes according to claim 9, characterized in that, This working method includes the following steps: Step 1: The straight metal tube is conveyed through the first inlet (2), and the bent metal tube is conveyed through the second inlet (3). After being pushed by the pushing component, the straight metal tube and the bent metal tube are pushed into the positioning and transfer unit in the corresponding side transfer bin (7) to complete the automatic feeding. Step 2: The metal straight tube and the metal bent tube are pushed into the rotary docking unit 1 and the rotary docking unit 2 by the electric push rods 2 (11) on both sides, and fixed by the clamps 1 (20) and 2 (34). Then, the metal straight tube and the metal bent tube are joined by the sliding block (21) and the clamp 1 (5). Step 3: Weld the upper half of the weld seam of the straight metal pipe and the bent metal pipe with the laser welding head (6). Then, the height of the base one (25) and the base two (30) is lowered. Then the rotating disk (24) and the clamp two (34) rotate synchronously on the same axis, and the lower half of the weld seam is flipped to the front. Step 4: Base 1 (25) and Base 2 (30) rise to their initial height and fit together with the straight and bent metal pipes again. After welding, clamps 1 (20) and 2 (34) release the clamps from fixing the straight and bent metal pipes. Then, base 1 (25) and Base 2 (30) descend again and carry the welded metal pipes onto the conveyor belt (29), completing the automatic discharge of the welded metal pipes.

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