Welding equipment for metal bent pipe and working method of welding equipment

Abstract

The invention discloses welding equipment for a metal bent pipe and a working method of the welding equipment, and particularly relates to the technical field of bent pipe welding. A metal straight pipe and the metal bent pipe are installed in a sliding seat and a first clamping seat correspondingly, the first clamping jaw positions the metal straight pipe, and the second clamping jaw positions the middle of the metal bent pipe; then the sliding seat and the first clamping seat drive the metal straight pipe and the metal bent pipe to be close and attached, and a laser welding head is used for welding an upper half circle of weld joint; the rotating disc drives the metal straight pipe in the first clamping jaw to turn over by a half circle, rotation of the second clamping jaw is kept consistent with the rotating axis of the rotating disc, the metal straight pipe and the metal bent pipe are kept to turn over synchronously when being fixedly clamped, welding stress is dispersed, welding quality is improved, deviation of the axis of the steel pipe is avoided, and welding of a whole circle of welding seams is completed. And positioning of the metal straight pipe and the metal bent pipe is relieved, the first base and the second base descend by the height equal to the height of the conveying strip, automatic discharging is achieved along with conveying of the conveying strip, and discharging is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of bent pipe welding, and specifically to a welding device for metal bent pipes and its working method. Background Technique

[0002] For petrochemical pipelines, automobile exhaust pipes, boiler pipes, heat exchanger pipelines, etc., a large number of bent pipe components are required. Metal bent pipes have a wide range of applications in industrial production, and their welding quality directly affects the performance and service life of products. However, due to the special shape of bent pipes, problems such as deformation and cracks are likely to occur during the welding process.

[0003] After retrieval, the utility model patent with the publication number CN217913751 U discloses a bent pipe welding device for metal product processing, which solves the problem that the current positioning fixture can only dock bent pipes of one angle and cannot adapt to bent pipes of different angles, and different bent pipes require different fixtures, increasing the production cost.

[0004] In the existing solution, for the welding of metal bent pipes, it is mostly installed on the fixture manually, and then the metal bent pipe workpiece is fitted with the pipe to be welded, and the weld is welded by rotating the welding head in a circle. However, this method relies on manual loading, and it is not easy to discharge the workpiece from the position of the weld after welding. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding device for metal bent pipes and its working method to solve the problems mentioned in the above background technique.

[0006] The main technical problem to be solved by the present invention is:

[0007] In the existing solution, it relies on manual loading, and it is not easy to discharge the workpiece from the position of the weld by rotating the welding head in a circle to weld the weld.

[0008] The present invention can be realized through the following technical solutions:

[0009] A welding device for metal bent pipes, including a welding chamber,

[0010] A laser welding head, which is lifted and installed in the middle of the inner cavity of the welding chamber;

[0011] A first feeding port, which is arranged on one side of the welding chamber and is used for conveying metal straight pipes;

[0012] A second feeding port, which is arranged on the other side of the welding chamber and is used for conveying metal bent pipes;

[0013] A transfer chamber, which is arranged at the ends of the first feeding port and the second feeding port;

[0014] A pushing component is arranged inside the welding chamber and is used to push the metal straight pipe and the metal bent pipe into the corresponding transfer chamber.

[0015] An adjusting seat is arranged at the bottom of the inner cavity of the welding chamber.

[0016] A first rotary docking unit is slidably arranged on one side of the upper part of the adjusting seat and positions the metal straight pipe.

[0017] A second rotary docking unit is slidably arranged on the other side of the upper part of the adjusting seat and positions the metal bent pipe. A positioning and transferring unit is installed in the transfer chamber in a lifting manner and moves the metal straight pipe and the metal bent pipe to the first rotary docking unit and the second rotary docking unit. The positioning and transferring unit includes two sliding transfer blocks.

[0018] The first rotary docking unit includes a sliding seat. A first base for supporting the metal straight pipe is installed in the sliding seat in a lifting manner. A rotating disc is rotatably installed on one side of the sliding seat, and a first clamping jaw for limiting the end of the metal straight pipe is installed on the surface of the rotating disc.

[0019] The second rotary docking unit includes a first clamping seat. A second base for supporting the metal bent pipe is installed in the first clamping seat in a lifting manner. A second clamping jaw for limiting the middle of the metal bent pipe is rotatably arranged in the first clamping seat, and the second clamping jaw is collinear with the rotation axis of the rotating disc.

[0020] A conveying strip with a height lower than the initial heights of the first base and the second base is arranged in the inner cavity of the welding chamber.

[0021] A further technical improvement of the present invention lies in that the pushing component includes a driving chamber arranged at the top of the inner cavity of the welding chamber. An electric push rod one is installed inside the driving chamber, and an inclined platform is arranged at the bottom surface of the driving chamber. A notch is arranged on the middle surface of the inclined platform.

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

[0023] A further technical improvement of the present invention lies in that the sliding plate extends into the positioning frame and is connected with an elastic member. An activity groove communicated with the notch is arranged on one side of the inner cavity of the driving chamber.

[0024] A further technical improvement of the present invention lies in that the positioning and transferring unit includes a transferring plate. An electric push rod two installed inside the welding chamber is arranged on the top surface of the transferring plate. The transfer block is slidably installed on the transferring plate.

[0025] A further technical improvement of the present invention lies in that socket seats are installed on the lower end surfaces of the sliding seat and the first clamping seat, and two threaded rods driven by the same double-shaft motor are arranged inside the adjusting seat, and each threaded rod is in threaded connection with the socket seat on the corresponding side;

[0026] A connecting frame with an L-shaped structure is installed on one side of the sliding seat, and the rotating disc is rotatably installed on the inner side surface of the connecting frame.

[0027] A further technical improvement of the present invention lies in that a placing groove is provided on the upper surface of the first base;

[0028] A matching groove is provided on the upper surface of the second base. An adapting groove runs through from the middle to the edge of the curved section of the matching groove, and the matching groove has the same size as the placing groove.

[0029] A further technical improvement of the present invention lies in that electric push rods three are installed on the bottom surfaces of the second base and the first base, and the electric push rods three are installed inside the first clamping seat and the sliding seat.

[0030] A further technical improvement of the present invention lies in that a receiving cavity is provided on the top surface of the first clamping seat, an electric push rod four is installed inside the receiving cavity, and the pushing end of the electric push rod four is fixed to the second clamping jaw through a rotating motor.

[0031] A further technical improvement of the present invention lies in that a discharge port is provided on the front side of the bottom of the welding chamber, and the conveying strip passes through the inside of the discharge port.

[0032] A working method of a welding device for metal bent pipes, the working method comprising the following steps:

[0033] Step 1: The metal straight pipe is conveyed through the first feeding port, and the metal bent pipe is conveyed through the second feeding port. After being pushed by the pushing assembly, the metal straight pipe and the metal bent pipe are pushed into the positioning and transferring unit in the corresponding side transfer chamber to complete automatic feeding;

[0034] Step 2: The metal straight pipe and the metal bent pipe are respectively pushed into the first rotating docking unit and the second rotating docking unit by the electric push rods two on both sides and are fixed by the first clamping jaw and the second clamping jaw. Then, by the approach of the sliding seat and the first clamping seat, the metal straight pipe and the metal bent pipe are fitted together;

[0035] Step 3: The upper half of the weld seams of the metal straight pipe and the metal bent pipe are welded by the laser welding head. Then, the first base and the second base descend in height, and then the rotating disc and the second clamping jaw rotate synchronously coaxially, and the lower half of the weld seam is turned to the front;

[0036] Step 4: The first base and the second base rise to the initial height and fit with the metal straight pipe and the metal bent pipe again. After welding, the first clamping jaw and the second clamping jaw release the fixation on the metal straight pipe and the metal bent pipe. Then, the first base and the second base descend again and drive the welded metal pipe onto the conveying strip to complete the automatic discharging of the welded metal pipe.

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

[0038] 1. By setting the positioning and transferring unit, the first rotating docking unit and the second rotating docking unit, the straight metal pipe and the bent metal pipe are respectively loaded into the sliding seat and the first clamping seat. The straight metal pipe is positioned by the first clamping jaw, and the middle part of the bent metal pipe is positioned by the second clamping jaw. Then, the sliding seat and the first clamping seat move towards the position close to the laser welding head, driving the straight metal pipe and the bent metal pipe to approach and fit together. The laser welding head welds the upper half of the weld seam. The first base and the second base synchronously lower their heights in the corresponding sliding seat and the first clamping seat. The rotating disk drives the straight metal pipe in the first clamping jaw to flip half a circle, while the rotation of the second clamping jaw keeps the same rotation axis as that of the rotating disk, so that the straight metal pipe and the bent metal pipe keep synchronous flipping during fixed clamping, dispersing the welding stress, improving the welding quality, avoiding the deviation of the steel pipe axis, and flipping the lower half of the weld seam to the front. At this time, the first base and the second base return to the initial height and contact the straight metal pipe and the bent metal pipe respectively. The laser welding head welds the remaining lower half of the weld seam after flipping half a circle, thus completing the welding of the entire weld seam. The first clamping jaw and the second clamping jaw release the positioning of the straight metal pipe and the bent metal pipe. The first base and the second base lower again to the height equal to that of the conveying strip. At this time, the welded metal pipe is conveyed along with the conveying strip and leaves through the discharge port, realizing automatic discharging, which is more convenient for discharging.

[0039] 2. Using feeding from both sides, and through the arranged pushing component, the elastic member in the sliding plate extending into the positioning frame is in an elastically compressed state. Then, the first electric push rod extends and pushes the positioning frame to slide along the driving cavity. During the sliding process, the fitting part slides along the inclined surface of the inclined platform. At this time, the elastic member is in a normal state, that is, it pushes the sliding plate to move downwards. At this time, the pushing block moves downwards and leaves the inside of the movable groove. The pushing block pushes the straight metal pipe and the bent metal pipe into the corresponding transfer bins, assisting in pushing the metal pipe workpiece and realizing automatic feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0041] Figure 1 is the external structural schematic diagram of the present invention;

[0042] Figure 2 is of the present invention Figure 1 the partial enlarged view at A in;

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

[0044] Figure 4 is of the present invention Figure 1 the partial enlarged view at B in;

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

[0046] Figure 6 This is a three-dimensional structure diagram of the first jaw and the first base of the present invention;

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

[0048] Figure 8 This is a three-dimensional structure diagram of the second base and the first clamping seat of the present invention;

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

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

[0051] In the figure: 1, welding bin; 2, first feeding port; 3, second feeding port; 4, adjusting seat; 5, first clamping seat; 6, laser welding head; 7, transfer bin; 8, driving cavity; 9, first electric push rod; 10, movable groove; 11, second electric push rod; 12, positioning frame; 13, elastic member; 14, sliding plate; 15, inclined table; 16, pushing block; 17, fitting portion; 18, notch; 19, transfer block; 20, first jaw; 21, sliding seat; 22, sleeve seat; 23, connecting frame; 24, rotating disk; 25, first base; 26, placing groove; 27, third electric push rod; 28, discharging port; 29, conveying strip; 30, second base; 31, matching groove; 32, adapting groove; 33, accommodating cavity; 34, second jaw; 35, fourth electric push rod. Detailed implementation manners

[0052] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0053] Please refer to Figures 1-10As shown in the figure, the present invention provides a welding device for metal bent pipes, including a welding chamber 1. One side of the welding chamber 1 is provided with a first feeding port 2 for conveying metal straight pipes, and the other side of the welding chamber 1 is provided with a second feeding port 3 for conveying metal bent pipes. The ends of the first feeding port 2 and the second feeding port 3 are both communicated with a transfer chamber 7. Inside the welding chamber 1, there is a pushing component for pushing the metal straight pipe and the metal bent pipe into the corresponding transfer chamber 7. At the bottom of the inner cavity of the welding chamber 1, there is an adjusting seat 4. On one side of the upper part of the adjusting seat 4, there is a rotating docking unit one for positioning the metal straight pipe slidingly, and on the other side of the upper part of the adjusting seat 4, there is a rotating docking unit two for positioning the metal bent pipe slidingly. Inside the transfer chamber 7, there is a positioning transfer unit installed for lifting and moving the metal straight pipe and the metal bent pipe into the rotating docking unit one and the rotating docking unit two. The positioning transfer unit includes two sliding transfer blocks 19, and the inner wall surface of the transfer block 19 fits with the inner wall surface of the first feeding port 2;

[0054] The rotating docking unit one includes a sliding seat 21. Inside the sliding seat 21, there is a first base 25 for supporting the metal straight pipe installed for lifting and lowering, and on one side of the sliding seat 21, there is a rotating disc 24 rotatably installed. On the surface of the rotating disc 24, there is a first jaw 20 for limiting the end of the metal straight pipe;

[0055] The rotating docking unit two includes a first clamping seat 5. Inside the first clamping seat 5, there is a second base 30 for supporting the metal bent pipe installed for lifting and lowering, and inside the first clamping seat 5, there is a second jaw 34 for limiting the middle part of the metal bent pipe rotatably installed. The second jaw 34 and the rotation axis of the rotating disc 24 are collinear;

[0056] In the middle of the inner cavity of the welding chamber 1, there is a laser welding head 6 installed for lifting and lowering, and inside the inner cavity of the welding chamber 1, there is a conveying strip 29, and the conveying strip 29 is lower than the initial height of the first base 25 and the second base 30;

[0057] In the initial position, the rotating docking unit one and the rotating docking unit two are located directly below the corresponding positioning transfer unit. The metal straight pipe enters through the first feeding port 2, and the metal bent pipe enters through the second feeding port 3. With the auxiliary pushing of the pushing component, they respectively reach the corresponding transfer chambers 7, and the metal straight pipe and the metal bent pipe are fixed by the transfer blocks 19 inside the transfer chambers 7. Then the positioning transfer unit lowers its height, positions and installs the metal straight pipe and the metal bent pipe in the rotating docking unit one and the rotating docking unit two. Then the two transfer blocks 19 open, rise and return to the initial height;

[0058] The metal straight pipe is positioned by the first jaw 20, and the middle part of the metal bent pipe is positioned by the second jaw 34. Then the sliding seat 21 and the first clamping seat 5 approach each other, that is, move towards the position close to the laser welding head 6 in the middle, driving the metal straight pipe and the metal bent pipe to approach and fit, and the upper half - circle weld seam is welded by the laser welding head 6;

[0059] Then, the first base 25 and the second base 30 synchronously descend in height within the corresponding sliding seats 21 and the first clamping seats 5. The rotating disk 24 drives the metal straight pipe within the first clamping jaw 20 to flip by half a turn, while the rotation of the second clamping jaw 34 remains consistent with the rotation axis of the rotating disk 24, enabling the metal straight pipe and the metal bent pipe to flip synchronously during fixed clamping, dispersing the welding stress, improving the welding quality, avoiding the deviation of the steel pipe axis, and since the first base 25 and the second base 30 descend in height, it does not affect the flipping action;

[0060] When the metal straight pipe and the metal bent pipe flip by half a turn, the lower half of the weld seam flips to the front. At this time, the first base 25 and the second base 30 return to the initial height and contact the metal straight pipe and the metal bent pipe respectively. The remaining half of the weld seam after flipping by half a turn is welded by the laser welding head 6, thus completing the welding of the entire weld seam;

[0061] Then, the first clamping jaw 20 and the second clamping jaw 34 release the positioning of the metal straight pipe and the metal bent pipe. The first base 25 and the second base 30 descend in height, and the welded metal pipe is transferred to the conveying strip 29 for automatic discharging, adopting a completely different method from the circular rotation welding in the existing scheme, making the discharging more convenient.

[0062] Refer to Figure 2 and Figure 3 As shown in, the pushing component includes a driving cavity 8 provided 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 an inclined platform 15 is provided at the bottom surface of the driving cavity 8. A notch 18 is provided on the middle surface of the inclined platform 15;

[0063] The pushing end of the electric push rod 9 is connected to a positioning frame 12 that is limited and slides along the track inside the driving cavity 8. A sliding plate 14 is movably installed inside the positioning frame 12. A push block 16 that protrudes outward and slides inside the notch 18 is provided in the middle of the bottom surface of the sliding plate 14, and a fitting portion 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 positioning frame 12 and is connected to an elastic member 13. An activity slot 10 that communicates with the notch 18 is provided on one side of the inner cavity of the driving cavity 8;

[0065] In the initial position, the push block 16 is located inside the notch 18 to ensure the smooth passage of the metal straight pipe and the metal bent pipe. The elastic member 13 in which the sliding plate 14 extends into the positioning frame 12 is in an elastically compressed state. Then, the electric push rod 9 extends and pushes the positioning frame 12 to slide along the driving cavity 8. During the sliding process, the fitting portion 17 slides along the inclined surface of the inclined platform 15. At this time, the elastic member 13 is in a normal state, that is, it pushes the sliding plate 14 to move downward. At this time, the push block 16 moves downward and leaves the inside of the activity slot 10, and the metal straight pipe and the metal bent pipe are pushed by the push block 16 into the corresponding transfer bin 7;

[0066] After entering the transfer bin 7, due to the reset of the electric push rod 9, the fitting part 17 fits with the inclined surface of the inclined table 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] Refer to Figure 4 and Figure 5 As shown in

[0068] Refer to Figure 4 、 Figure 6 and Figure 8 As shown, the lower end surfaces of the sliding seat 21 and the first clamping seat 5 are both equipped with socket seats 22. Inside the adjusting seat 4, there are two threaded rods driven by the same double-shaft motor, and each threaded rod is threadedly connected to the corresponding socket seat 22;

[0069] Initially, the sliding seat 21 and the first clamping seat 5 are located below the two transfer bins 7, facilitating the loading of the metal straight pipe and the metal bent pipe. Then, the threaded rods are used to drive the metal straight pipe and the metal bent pipe in the sliding seat 21 and the first clamping seat 5 to approach each other, and they are welded by the laser welding head 6 at the top;

[0070] One side of the sliding seat 21 is equipped with a connecting frame 23 with an L-shaped structure. The rotating disk 24 is rotatably installed on the inner side of the connecting frame 23. Since the rotating disk 24 can rotate, with the center of the rotating disk 24 as the rotation base point, to change the welding position of the metal pipe. It should be noted that the metal straight pipe and the metal bent pipe rotate synchronously, and the heights of the first base 25 and the second base 30 decrease;

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

[0072] The upper surface of the second base 30 is provided with a matching groove 31 for placing the metal bent pipe. An adaptation groove 32 runs through from the middle to the edge of the curved section of the matching groove 31. The matching groove 31 has the same size and the same axis as the placement groove 26 to ensure consistent welding specifications.

[0073] Refer to Figure 7 As shown, electric push rods 27 are installed on the bottom surfaces of both the second base 30 and the first base 25. The electric push rods 27 are installed inside the first clamping seat 5 and the sliding seat 21. Initially, the first base 25 and the second base 30 are at the same height. After welding half of the weld seam, the first base 25 and the second base 30 move down synchronously in height.

[0074] Refer to Figure 9 As shown, a receiving cavity 33 is provided on the top surface of the clamping seat 5. An electric push rod four 35 is installed inside the receiving cavity 33. The pushing end of the electric push rod four 35 is fixed to the clamping jaw two 34 through a rotating motor;

[0075] Initially, the clamping jaw two 34 is received in the receiving cavity 33 and is in an open state. After placing the metal bent pipe into the matching groove 31, the electric push rod four 35 pushes the opened clamping jaw two 34 to move towards the direction of the fitting groove 32. Then, the clamping jaw two 34 limits the middle part of the metal bent pipe, and then the rotating motor drives the clamping jaw two 34 to flip half a circle, maintaining the same flipping speed as the metal straight pipe.

[0076] Refer to Figure 10 As shown, a discharge port 28 is provided on the front side of the bottom of the welding bin 1. The conveying strip 29 passes through the inside of the discharge port 28. Since the base one 25 and the base two 30 descend and drive the welded metal pipe onto the conveying strip 29, and leave the inside of the welding bin 1 through the discharge port 28, the automatic discharging of the welded metal pipe is completed.

[0077] The present invention provides a working method for a welding device for metal bent pipes, and the working method includes the following steps:

[0078] Step 1: The metal straight pipe is conveyed by the feeding port one 2, and the metal bent pipe is conveyed by the feeding port two 3. After being pushed by the pushing component, the metal straight pipe and the metal bent pipe are pushed into the positioning and transferring unit in the corresponding side transfer bin 7 to complete automatic feeding;

[0079] Step 2: The electric push rods two 11 on both sides push the metal straight pipe and the metal bent pipe into the rotating docking unit one and the rotating docking unit two respectively, and are fixed by the clamping jaw one 20 and the clamping jaw two 34. Then, by the approach of the sliding seat 21 and the clamping seat 5, the metal straight pipe and the metal bent pipe are fitted together;

[0080] Step 3: The upper half of the weld of the metal straight pipe and the metal bent pipe is welded by the laser welding head 6. Then, the base one 25 and the base two 30 descend in height, and then the rotating disk 24 and the clamping jaw two 34 rotate coaxially and synchronously, and the lower half of the weld is flipped to the front;

[0081] Step 4: The base one 25 and the base two 30 rise to the initial height and fit with the metal straight pipe and the metal bent pipe again. After welding, the clamping jaw one 20 and the clamping jaw two 34 release the fixation of the metal straight pipe and the metal bent pipe. Then, the base one 25 and the base two 30 descend again and drive the welded metal pipe onto the conveying strip 29 to complete the automatic discharging of the welded metal pipe.

[0082] When the present invention is in use, it adopts feeding from both sides. Through the arranged pushing component, the elastic member 13 in which the sliding plate 14 extends into the positioning frame 12 is in an elastically compressed state. Then, the first electric push rod 9 extends and pushes the positioning frame 12 to slide along the driving cavity 8. During the sliding process, the fitting portion 17 slides along the inclined surface of the inclined platform 15. At this time, the elastic member 13 is in a normal state, that is, it pushes the sliding plate 14 to move downward. At this time, the pushing block 16 moves downward and leaves the inside of the movable groove 10. The pushing block 16 pushes the metal straight pipe and the metal bent pipe into the corresponding transfer bin 7. After entering the transfer bin 7, due to the reset of the first electric push rod 9, the fitting portion 17 fits with 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 pushing block 16 resets to the notch 18;

[0083] By setting the positioning and transferring unit, the first rotation and docking unit, and the second rotation and docking unit, the metal straight pipe and the metal bent pipe are loaded into the sliding seat 21 and the first clamping seat 5. The metal straight pipe is positioned by the first clamping jaw 20, and the middle part of the metal bent pipe is positioned by the second clamping jaw 34. Then, the sliding seat 21 and the first clamping seat 5 move towards the position close to the laser welding head 6 in the middle, driving the metal straight pipe and the metal bent pipe to approach and fit. The laser welding head 6 welds the upper half - circle weld seam; the first base 25 and the second base 30 synchronously descend in the corresponding sliding seat 21 and the first clamping seat 5. The metal straight pipe in the first clamping jaw 20 is flipped half a circle by driving the rotating disk 24, and the rotation of the second clamping jaw 34 keeps the same rotation axis as that of the rotating disk 24, so that the metal straight pipe and the metal bent pipe keep synchronous flipping during fixed clamping, dispersing the welding stress, improving the welding quality, and avoiding the deviation of the steel pipe axis. The lower half - circle weld seam is flipped to the front. At this time, the first base 25 and the second base 30 return to the initial height and are respectively in contact with the metal straight pipe and the metal bent pipe. The laser welding head 6 welds the remaining half - circle weld seam after flipping half a circle, thus completing the welding of the entire circle weld seam;

[0084] The positioning of the metal straight pipe and the metal bent pipe by the first clamping jaw 20 and the second clamping jaw 34 is released. The first base 25 and the second base 30 descend again to the height equal to that of the conveying strip 29. At this time, the welded metal pipe is conveyed along with the conveying strip 29 and leaves through the discharge port 28, realizing automatic discharging, which is more convenient for discharging.

[0085] The above - mentioned is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to it as equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above - mentioned embodiment according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A welding device for a metal pipe bend, comprising a welding chamber (1), characterized in that: A laser welding head (6) is arranged in a lifting manner in the middle of the inner cavity of the welding chamber (1); A first feeding port (2) is provided at one side of the welding bin (1) and is used for conveying the straight metal pipe; A second feed port (3) is provided at the other side of the welding chamber (1) and is used for conveying the metal elbow; A transfer bin (7) is provided at the ends of the first feed port (2) and the second feed port (3); A push assembly is arranged inside the welding bin (1) and is used to push the metal straight pipe and the metal bent pipe into the corresponding transfer bin (7); An adjustment seat (4) is arranged at the bottom of the inner cavity of the welding chamber (1); A rotating docking unit 1 is slidably arranged on one side of the upper portion of the adjustment seat (4) and positions the metal straight pipe; The second rotary docking unit is arranged on the other side of the upper part of the adjustment seat (4) and slides simultaneously with the adjustment seat (4) to position the metal elbow; A positioning transfer unit is installed in a transfer bin (7) and is lifted to move the metal straight pipe and the metal bent pipe to the first rotary docking unit and the second rotary docking unit. The positioning transfer unit includes two sliding transfer blocks (19); The rotary docking unit comprises a slide seat (21), a base seat (25) for supporting the metal straight pipe is installed in the slide seat (21) for lifting, and a rotating disk (24) is rotatably installed on one side of the slide seat (21), and a clamping claw (20) for limiting the end of the metal straight pipe is installed on the surface of the rotating disk (24); The second rotary docking unit comprises a clamping seat (5), wherein a base (30) for supporting the metal bent pipe is installed in the clamping seat (5) in a lifting manner, and a clamping claw (34) for limiting the middle part of the metal bent pipe is rotatably provided in the clamping seat (5), and the clamping claw (34) is colinear with the rotation axis of the rotating disk (24); The inner cavity of the welding chamber (1) is provided with a conveying belt (29) which is lower than the initial height of the base 1 (25) and the base 2 (30).

2. A metal pipe bending welding device according to claim 1, characterized in that: The push assembly comprises a driving chamber (8) arranged at the top of the inner chamber of the welding chamber (1), an electric push rod (9) is installed inside the driving chamber (8), and a ramp (15) is arranged on the bottom surface of the driving chamber (8), and a notch (18) is arranged on the middle surface of the ramp (15); The pushing end of the electric push rod (9) is connected to a positioning frame (12) which slides along the track in the driving cavity (8), and a sliding plate (14) is movably installed inside the positioning frame (12). A push block (16) which protrudes outward and slides in a groove (18) is provided in the middle of the bottom surface of the sliding plate (14), and a fitting portion (17) which cooperates with the inclined surface on the inclined platform (15) is provided on one side of the bottom of the sliding plate (14).

3. A metal pipe bending welding device 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 member (13). One side of the inner cavity of the driving cavity (8) is provided with a movable groove (10) that communicates with the missing groove (18).

4. A metal pipe bending welding device according to claim 3, characterized in that: The positioning transfer unit comprises a transfer plate, the top surface of which is provided with an electric push rod 2 (11) installed inside the welding bin (1), and a transfer block (19) is slidably installed on the transfer plate.

5. A metal pipe bending welding device according to claim 4, characterized in that: The lower end surfaces of the sliding seat (21) and the clamping seat (5) are both provided with a sleeve seat (22), and the interior of the adjusting seat (4) is provided with two threaded rods driven by the same dual-axis motor, and each threaded rod is threadedly connected to the sleeve seat (22) on the corresponding side; A connecting frame (23) with an L-shaped structure is installed on one side of the sliding seat (21), and a rotating disk (24) is rotatably installed on the inner side surface of the connecting frame (23).

6. A metal pipe bending welding device according to claim 5, characterized in that: The upper surface of the base 1 (25) is provided with a placement groove (26); A matching groove (31) is provided on the upper surface of the second base (30), and an adapting groove (32) is provided from the middle of the curved section of the matching groove (31) to the edge, and the matching groove (31) has the same size as the placement groove (26).

7. A metal pipe bending welding device according to claim 6, characterized in that: The bottom surfaces of the second base (30) and the first base (25) are both equipped with an electric push rod three (27), and the electric push rod three (27) is installed inside the clamping seat one (5) and the sliding seat (21).

8. The metal pipe bending welding equipment according to claim 7, characterized in that: The top surface of the clamp seat 1 (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 clamping claw 2 (34) through a rotating motor.

9. The metal pipe bending welding equipment according to claim 8, characterized in that: A discharge port (28) is provided at the front side of the bottom of the welding bin (1), and a conveying belt (29) passes through the inside of the discharge port (28).

10. The working method of the metal pipe bending welding equipment according to claim 9, characterized in that: The working method comprises the following steps: Step 1: The straight metal tube is conveyed from the first feeding port (2), and the bent metal tube is conveyed from the second feeding port (3). After being pushed by the push assembly, the straight metal tube and the bent metal tube are pushed to the positioning transfer unit in the corresponding side transfer bin (7), thereby completing automatic loading; Step 2: The electric push rods 2 (11) on both sides push the metal straight pipe and the metal bent pipe into the rotating docking unit 1 and the rotating docking unit 2 respectively, and are fixed by the clamping claw 1 (20) and the clamping claw 2 (34), and then the sliding seat (21) and the clamping seat 1 (5) are brought closer to complete the bonding of the metal straight pipe and the metal bent pipe; Step 3: The upper half circle weld of the metal straight pipe and the metal bent pipe is welded by the laser welding head (6), and then the base 1 (25) and the base 2 (30) are lowered, and then the rotating disk (24) and the clamping jaw 2 (34) are synchronously rotated coaxially, and the lower half circle weld is turned over to the front side; Step 4: Base 1 (25) and base 2 (30) rise to the initial height and fit with the metal straight pipe and the metal curved pipe again. After welding, clamp 1 (20) and clamp 2 (34) release the fixation of the metal straight pipe and the metal curved pipe. Then, base 1 (25) and base 2 (30) descend again and drive the welded metal pipe to the conveyor belt (29), completing the welding of the metal pipe and automatically discharging the material.

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