Intelligent welding device and method for lower frame of excavator

Abstract

The present application relates to the technical field of construction machinery structure welding, and especially to an intelligent welding device for a lower frame of an excavator, comprising a base, a fixing seat arranged on the outer wall of the base, a rotary table sleeved on the outside of the fixing seat, an X support placed on the outside of the rotary table, and a continuous welding device arranged between the rotary table and the X support. The present application uses a rotating roller to real-time clamp and limit two cover plates, which can effectively prevent the cover plate angular deformation caused by the cooling and shrinkage of the weld, and can save the symmetrical welding, segmented skip welding and other processes, reduce the post-welding slag cleaning, polishing and other finishing workloads, compress the processing time, improve the welding forming quality and production efficiency, and meanwhile, with the help of the self-adaptive adjustment of the deflection assembly, the welding head can be accurately deflected along the inclined plane, the X support complex inclined plane continuous welding can be adapted, the angular deviation and welding blind area can be avoided, the weld penetration uniformity and the regular appearance can be ensured, and the welding precision and continuity can be further improved, and the overall welding quality can be stabilized.

Description

Technical Field

[0001] This invention relates to the field of welding technology for structural components of engineering machinery, and in particular to an intelligent welding device and method for the underframe of an excavator. Background Technology

[0002] The excavator underframe X-bracket is a core heavy structural component for the machine's load-bearing and movement. The existing process involves spot welding the upper and lower cover plates and the inner side of the web plate for positioning, then clamping and fixing them before welding. During the welding process, the weld seam cools and shrinks instantly, which can easily cause angular deformation of the cover plate. The industry generally adopts symmetrical welding and segmented skip welding to reduce welding stress and deformation. However, this process will create a large number of weld joints and arc initiation and termination points, which will increase the workload of post-weld slag removal, grinding and appearance finishing, resulting in increased processing time. Summary of the Invention

[0003] In view of the problems in the above or existing technologies, such as the instantaneous cooling and shrinkage of the weld after the welding process easily causing angular deformation of the cover plate, and the increased processing time caused by symmetrical welding and segmented skip welding, the present invention is proposed.

[0004] Therefore, the purpose of this invention is to provide an intelligent welding device for the underframe of an excavator.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, it includes a base and a fixed seat disposed on the outer wall of the base;

[0007] A turntable sleeved outside the fixed base, an X-bracket placed outside the turntable, and a continuous welding device disposed between the turntable and the X-bracket include a guide assembly disposed between the turntable and the top base, a welding assembly disposed between the guide assembly and the positioning plate, and a deflection assembly disposed between the welding assembly and the guide assembly.

[0008] The guide assembly includes a base plate sleeved on the outside of the top seat and a guide plate disposed on the outside of the base plate;

[0009] The welding assembly includes a guide rod disposed inside the base plate and a welding head disposed outside the base plate;

[0010] The deflection assembly includes a rotating roller disposed outside the base plate and a rotating plate disposed outside the guide plate.

[0011] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, wherein: a top seat is provided on the outer wall of the fixed seat, a positioning plate is provided at the end of the top seat, the X-bracket is provided on the positioning plate, the guide assembly further includes a fixing block, a fixing block is provided on the outer wall of the turntable, a sliding column is inserted into the inside of the fixing block, a tension spring is sleeved on the outside of the sliding column, a rotating plate is provided on the outer wall of the guide plate, and a guide groove is provided on the outer wall of the bottom plate.

[0012] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the bottom plate is sleeved on the outside of the top seat, the guide groove matches the welding path of the X-bracket and the web plate in the X-bracket, the X-bracket is disposed on the outer wall of the positioning plate, the shape of the X-bracket and the positioning plate matches, and the outer wall of the positioning plate is provided with a positioning frame.

[0013] In a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the welding assembly further includes a fixing plate, the end of the rotating plate is provided with a fixing plate, and the outer wall of the fixing plate is provided with a connecting rod.

[0014] In a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the end of the first guide rod is disposed on the outer wall of the connecting rod, the end of the first guide rod is arc-shaped, the connecting rod is "L"-shaped, the number of welding heads is two, and the first guide rod is disposed inside the guide groove.

[0015] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the deflection assembly further includes a second sliding column, the second sliding column is inserted into the inside of the fixed block, a second tension spring is sleeved on the outside of the second sliding column, a U-shaped column is provided at the end of the second sliding column, a guide rod is provided at the end of the U-shaped column, a positioning pin is provided inside the rotating plate, and a limit groove is formed on the surface of the guide plate.

[0016] In a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the positioning pin is disposed inside the limiting groove, and the end of the positioning pin is disposed on the outer wall of the rotating plate.

[0017] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the number of the sliding column two, the tension spring two, the U-shaped column, the guide rod two, and the rotating roller are all two. The diameter of the middle section of the rotating roller is smaller than the diameter of both ends. The end of the guide rod two is located inside the guide groove. The rotating roller is located between the two cover plates of the X-bracket.

[0018] As a preferred embodiment of the intelligent welding device for the excavator underframe of the present invention, the outer wall of the base is provided with a drive motor, the output end is provided with a drive gear, the bottom of the turntable is provided with an internal gear ring, and the connection between the fixed seat and the turntable is provided with a bearing.

[0019] This invention also provides the following technical solution: an intelligent welding method, including an intelligent welding device for the underframe, and...

[0020] S1 workpiece positioning: The X-bracket is placed on the surface of the positioning plate by the hoisting equipment. The X-bracket is pushed from the end away from the fixed block so that the three sides of the X-bracket are in contact with the inner wall of the positioning frame, thus completing the X-bracket positioning. At this time, the output ends of the two welding heads are aligned with the connection between the upper and lower cover plates and the web plate of the X-bracket. The rotating roller is placed between the upper and lower cover plates and in contact with the surface of the cover plates.

[0021] S2 Equipment Start-up: Start the drive motor, which drives the drive gear to mesh with the internal gear ring, causing the turntable to rotate counterclockwise around the fixed base;

[0022] S3 Continuous Straight Edge Welding: The turntable drives the welding assembly and the deflection assembly to rotate synchronously through the fixed block, sliding column one, guide plate and rotating plate. Guide rod one guides along the guide groove of the bottom plate, so that the welding head is continuously welded along the connection between the upper and lower cover plates and the web plate. At the same time, guide rod two guides along the guide groove, driving the rotating roller to move synchronously with the welding head. The rotating roller clamps and limits the upper and lower cover plates in real time to suppress the corner deformation of the cover plates caused by the cooling and shrinkage of the weld.

[0023] S4 sloping surface adaptive welding: When welding to the sloping surfaces of the grooves at both ends of the X bracket, the rotating roller first contacts the sloping surface, and the second guide rod slides in the guide groove, causing the second sliding column and the U-shaped column to slide relative to the first sliding column. The tension spring second extends and retracts to adjust; the second sliding column drives the rotating plate to rotate around the positioning pin shaft, and the rotating plate synchronously drives the rotating roller to move, and drives the rotating plate to rotate around the guide plate through the positioning pin shaft; the rotating plate drives the fixed plate and the connecting rod to deflect, so that the welding head can accurately turn with the sloping surface angle. The limiting groove restricts the rotation stroke of the positioning pin shaft, ensuring that the welding head and the sloping surface maintain an effective welding angle, and completing the continuous welding of the sloping surface;

[0024] S5 Welding Finishing: After the X-bracket has completed welding around the entire circle, turn off the drive motor, stop the turntable from rotating, and after the workpiece has cooled down, remove the welded X-bracket to complete the welding operation.

[0025] The beneficial effects of the intelligent welding device for the excavator underframe of the present invention are as follows: The present invention effectively suppresses the angular deformation of the cover plates caused by the cooling and shrinkage of the weld by using a rotating roller to clamp and limit the two cover plates in real time. It eliminates the need for symmetrical welding and segmented skip welding processes, reduces the number of weld joints and arc initiation and termination points, significantly reduces the workload of post-weld slag removal, grinding and appearance finishing, shortens subsequent processing time, and improves welding quality and production efficiency. Relying on the adaptive adjustment of the deflection component, the welding head can deflect precisely in real time with the angle of the inclined plane, adapting to the continuous welding requirements of complex inclined plane welds of the X-bracket, ensuring uniform weld penetration and regular formation, eliminating angle deviation and welding blind spots during inclined plane welding, further improving welding accuracy and welding continuity, and ensuring the overall welding quality stability of the X-bracket. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the overall structure of the intelligent welding device for the excavator underframe;

[0028] Figure 2 An exploded view of the top seat, positioning plate, and X-bracket in the intelligent welding device of the excavator underframe;

[0029] Figure 3 A schematic diagram showing the connection of the intelligent welding device and welding components in the excavator underframe;

[0030] Figure 4 A schematic diagram showing the connection between the bottom plate and the guide groove in the intelligent welding device of the excavator underframe;

[0031] Figure 5 A schematic diagram showing the connection between the positioning plate and the positioning frame in the intelligent welding device of the excavator underframe;

[0032] Figure 6 A schematic diagram showing the connection between guide rod 1 and the base plate in the intelligent welding device of the excavator underframe;

[0033] Figure 7 A schematic diagram showing the connection between sliding column 2 and rotating plate in the intelligent welding device of the excavator underframe;

[0034] Figure 8 A schematic diagram showing the connection between the rotating plate and the rotating roller in the intelligent welding device of the excavator underframe;

[0035] Figure 9 for Figure 1A bottom view.

[0036] The labels in the diagram represent: 1. Base; 2. Fixed seat; 3. Turntable; 4. Top seat; 5. Positioning plate; 51. Positioning frame; 6. X-bracket; 7. Continuous welding device; 71. Guide assembly; 711. Fixed block; 712. Sliding column one; 713. Tension spring one; 714. Guide plate; 715. Rotating plate; 716. Base plate; 717. Guide groove; 72. Welding assembly; 721. Fixed plate; 722. Connecting rod; 723. Guide rod one; 724. Welding head; 73. Deflection assembly; 731. Sliding column two; 732. Tension spring two; 733. U-shaped column; 734. Guide rod two; 735. Rotating plate; 736. Rotating roller; 737. Limiting groove; 738. Positioning pin; 8. Drive motor; 9. Drive gear; 10. Internal gear ring. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1, referring to Figures 1 to 2 This is the first embodiment of the present invention, which provides an intelligent welding device for the excavator underframe, including a base 1 and a fixing seat 2 disposed on the outer wall of the base 1;

[0041] Specifically, the turntable 3 sleeved outside the fixed base 2, the X-bracket 6 placed outside the turntable 3, and the continuous welding device 7 disposed between the turntable 3 and the X-bracket 6 include a guide assembly 71 disposed between the turntable 3 and the top base 4, a welding assembly 72 disposed between the guide assembly 71 and the positioning plate 5, and a deflection assembly 73 disposed between the welding assembly 72 and the guide assembly 71.

[0042] Furthermore, the bottom of the fixed seat 2 is fixedly connected to the center of the upper surface of the base 1. The top diameter of the fixed seat 2 is larger than the bottom diameter. The rotating platform 3 is sleeved on the outer surface of the fixed seat 2. The X-bracket 6 is placed directly above the base 1 and inside the rotating platform 3. The X-bracket 6 includes an upper cover plate, a lower cover plate, and a web plate located at the connection between the upper cover plate and the lower cover plate.

[0043] Reference Figure 2 , Figure 3 , Figure 6 and Figure 7 The guide assembly 71 includes a base plate 716 sleeved on the outside of the top seat 4 and a guide plate 714 disposed on the outside of the base plate 716.

[0044] Furthermore, the base plate 716 is fixedly sleeved on the outer surface of the top seat 4, and the guide plate 714 is rotatably connected to the outside of the X bracket 6 and the base plate 716 with the center of the top seat 4 as the center.

[0045] Specifically, the welding assembly 72 includes a guide rod 723 disposed inside the base plate 716 and a welding head 724 disposed outside the base plate 716;

[0046] Furthermore, the end face of the guide rod 723 is inserted into the interior of the base plate 716, and there are two welding heads 724, which are respectively installed on the outside of the base plate 716 and located at the connection between the upper and lower cover plates and the web plate.

[0047] Specifically, the deflection assembly 73 includes a rotating roller 736 disposed outside the base plate 716 and a rotating plate 735 disposed outside the guide plate 714;

[0048] Furthermore, the rotating roller 736 is located outside the base plate 716 and between the two upper and lower cover plates, and the rotating roller 736 does not contact the web plate to maintain sufficient spacing for welding. The rotating plate 735 is rotatably connected to the bottom of the guide plate 714.

[0049] Reference Figures 2 to 5 The outer wall of the fixed base 2 is provided with a top base 4, and the end of the top base 4 is provided with a positioning plate 5. The X bracket 6 is provided on the positioning plate 5. The guide assembly 71 also includes a fixing block 711. The outer wall of the turntable 3 is provided with a fixing block 711. A sliding column 712 is inserted into the inside of the fixing block 711. A tension spring 713 is sleeved on the outside of the sliding column 712. The outer wall of the guide plate 714 is provided with a rotating plate 715. The outer wall of the bottom plate 716 is provided with a guide groove 717.

[0050] Furthermore, the end of the top seat 4 is fixedly connected to the center of the upper surface of the fixed seat 2, the positioning plate 5 is fixedly connected to the end of the top seat 4, the bottom of the X bracket 6 is attached to the upper surface of the positioning plate 5, the bottom of the fixed block 711 is fixedly connected to the upper surface of the turntable 3, the sliding column 712 slides through the fixed block 711, the tension spring 713 is sleeved on the outer surface of the sliding column 712, a disc is fixedly connected to the end face of the sliding column 712, one end of the tension spring 713 is fixedly connected to the surface of the disc, the other end of the tension spring 713 is fixedly connected to the surface of the fixed block 711, the rotating plate 715 is rotatably connected to the upper surface of the guide plate 714 through a fixing pin, and the guide groove 717 is opened at the edge of the upper surface of the base plate 716.

[0051] Specifically, the base plate 716 is fitted onto the outside of the top seat 4, the guide groove 717 matches the welding path of the X-frame and the web plate in the X-bracket 6, the X-bracket 6 is set on the outer wall of the positioning plate 5, the X-bracket 6 and the positioning plate 5 are matched in shape, and the outer wall of the positioning plate 5 is provided with a positioning frame 51.

[0052] Furthermore, the base plate 716 is fixedly sleeved on the outside of the top seat 4, and the upper surface of the top seat 4 is not in contact with the positioning plate 5. The surface of the lower cover plate in the X bracket 6 is in contact with the upper surface of the positioning plate 5, and the three sides of the lower cover plate are in contact with the positioning frame 51.

[0053] Reference Figure 6 The welding assembly 72 also includes a fixing plate 721, the end of the rotating plate 715 is provided with the fixing plate 721, and the outer wall of the fixing plate 721 is provided with a connecting rod 722;

[0054] Furthermore, the fixing plate 721 is fixedly connected to the end face of the rotating plate 715 away from the sliding column 712, and the top end of the connecting rod 722 is fixedly connected to the lower surface of the fixing plate 721.

[0055] Specifically, the end of the guide rod 723 is located on the outer wall of the connecting rod 722. The end of the guide rod 723 is arc-shaped, the connecting rod 722 is "L"-shaped, there are two welding heads 724, and the guide rod 723 is located inside the guide groove 717.

[0056] Furthermore, the top end of the guide rod 723 is fixedly connected to the end of the connecting rod 722. The end face of the guide rod 723 away from the connecting rod 722 is arc-shaped. There are two welding heads 724, which are located on the upper and lower surfaces of the fixing plate 721 respectively. The end face of the guide rod 723 away from the connecting rod 722 extends into the interior of the guide groove 717.

[0057] Reference Figure 7 and Figure 8The deflection assembly 73 also includes a sliding post 731. The sliding post 731 is inserted into the inside of the fixing block 711. A tension spring 732 is sleeved on the outside of the sliding post 731. A U-shaped post 733 is provided at the end of the sliding post 731. A guide rod 734 is provided at the end of the U-shaped post 733. A positioning pin 738 is provided inside the rotating plate 735. A limit groove 737 is opened on the surface of the guide plate 714.

[0058] Furthermore, the second sliding column 731 slides through the fixed block 711, the second tension spring 732 is sleeved on the outer surface of the second sliding column 731, the end of the second sliding column 731 is provided with a protruding plate, the two ends of the second tension spring 732 are respectively fixedly connected to the opposite surfaces of the protruding plate and the fixed block 711, the U-shaped column 733 is fixedly connected to the end face of the second sliding column 731 away from the second tension spring 732, the positioning pin 738 is fixedly connected to the inside of the rotating plate 735 and extends to the upper surface of the rotating plate 735, and the limiting groove 737 is opened on the surface of the guide plate 714, and the limiting groove 737 is arc-shaped;

[0059] Specifically, the positioning pin 738 is disposed inside the limiting groove 737, and the end of the positioning pin 738 is disposed on the outer wall of the rotating plate 715.

[0060] Furthermore, the positioning pin 738 passes through and is slidably connected inside the limiting groove 737, and the end face of the positioning pin 738 away from the rotating plate 735 is fixedly connected to the surface of the rotating plate 715.

[0061] Specifically, there are two sliding column 731, two tension spring 732, two U-shaped column 733, two guide rod 734 and two rotating roller 736. The diameter of the middle section of the rotating roller 736 is smaller than the diameter of both ends. The end of the guide rod 734 is located inside the guide groove 717. The rotating roller 736 is located between the two cover plates of the X bracket 6.

[0062] Furthermore, there are two of each of the sliding column 731, tension spring 732, U-shaped column 733, guide rod 734, and rotating roller 736, which are arranged on both sides of the welding head 724. The middle section of the rotating roller 736 is fixedly fitted with a bearing, and a connecting block is fixedly fitted to the outside of the bearing. The connecting block is fixedly connected to the upper end face of the U-shaped column 733. The upper and lower surfaces of the rotating roller 736 abut against the opposite surfaces of the two cover plates of the X bracket 6.

[0063] Specifically, a drive motor 8 is provided on the outer wall of the base 1, a drive gear 9 is provided at the output end of the drive motor 8, an internal gear ring 10 is provided at the bottom of the turntable 3, and a bearing is provided at the connection between the fixed base 2 and the turntable 3.

[0064] Reference Figure 9The drive motor 8 is fixedly mounted on the base 1 and located below the turntable 3. The drive gear 9 is fixedly connected to the output end of the drive motor 8. The internal gear ring 10 is fixedly connected to the lower surface of the turntable 3. The turntable 3 is rotatably connected to the outside of the fixed seat 2 through the bearing.

[0065] This embodiment provides an intelligent welding method, including the intelligent welding device for the underframe in the above embodiment, which includes:

[0066] S1 Workpiece positioning: The X-bracket 6 is placed on the surface of the positioning plate 5 by the hoisting equipment. The X-bracket 6 is pushed from the end away from the fixed block 711 so that the three sides of the X-bracket 6 are in contact with the inner wall of the positioning frame 51, thus completing the positioning of the X-bracket 6. At this time, the output ends of the two welding heads 724 are aligned with the connection between the upper and lower cover plates and the web plate of the X-bracket 6. The rotating roller 736 is placed between the upper and lower cover plates and in contact with the surface of the cover plates.

[0067] S2 Equipment Start-up: Start drive motor 8, drive motor 8 drives drive gear 9 to mesh with internal gear ring 10, driving turntable 3 to rotate counterclockwise around fixed base 2;

[0068] S3 Continuous Straight Edge Welding: Turntable 3 drives welding assembly 72 and deflection assembly 73 to rotate synchronously through fixed block 711, sliding column 1 712, guide plate 714, and rotating plate 715. Guide rod 1 723 is guided along guide groove 717 of bottom plate 716, so that welding head 724 is continuously welded along the connection between upper and lower cover plates and web plate. At the same time, guide rod 2 734 is guided along guide groove 717, driving rotating roller 736 to move synchronously with welding head 724. Rotating roller 736 clamps and limits upper and lower cover plates in real time to suppress cover plate corner deformation caused by weld cooling and shrinkage.

[0069] S4 sloping surface adaptive welding: When welding to the sloping surfaces of the grooves at both ends of the X bracket 6, the rotating roller 736 first contacts the sloping surface, and the guide rod 734 slides in the guide groove 717, driving the sliding column 731 and the U-shaped column 733 to slide relative to the sliding column 712. The tension spring 732 extends and retracts to adjust; the sliding column 731 drives the rotating plate 735 to rotate around the positioning pin 738, and the rotating plate 735 synchronously drives the rotating roller 736 to move, and drives the rotating plate 715 to rotate around the guide plate 714 through the positioning pin 738; the rotating plate 715 drives the fixed plate 721 and the connecting rod 722 to deflect, so that the welding head 724 can accurately turn with the sloping surface angle. The limiting groove 737 limits the rotation stroke of the positioning pin 738, ensuring that the welding head 724 maintains an effective welding angle with the sloping surface, and completing the continuous welding of the sloping surface;

[0070] S5 Welding Finishing: After the X-bracket 6 has completed the welding of the entire circle of weld seam, turn off the drive motor 8, the turntable 3 stops rotating, and after the workpiece has cooled down, remove the welded X-bracket 6 to complete the welding operation.

[0071] Before welding, the X-bracket 6 is placed on the surface of the positioning plate 5 using hoisting equipment, and pushed from the end away from the fixing block 711, so that three sides of the X-bracket 6 are in contact with the inner wall of the positioning frame 51. At this time, the positioning of the X-bracket 6 is completed, and the output ends of the two welding heads 724 are located at the connection between the two cover plates and the web of the X-bracket 6. At the same time, the rotating roller 736 is also located between the two cover plates, and the upper and lower end faces of the rotating roller 736 are in contact with the surface of the cover plates. The distance between the two cover plates is positioned. The drive motor 8 is turned, which drives the drive gear 9 to mesh with the internal gear ring 10, thereby driving the turntable 3 to rotate counterclockwise. The turntable 3 drives the welding assembly 72 and the deflection assembly 73 to rotate synchronously through the fixing block 711, the sliding column 712, the guide plate 714, and the rotating plate 715. The guide rod 723 rotates and guides the welding head 724 to weld synchronously and continuously along the connection between the upper and lower cover plates and the web plate. At the same time, the guide rod 734 guides the welding head 724 to move synchronously with the welding head 724. During the welding process, the rollers 736 limit the two cover plates on the front and rear sides of the welding point to prevent deformation of the cover plates and web plates during welding. The real-time clamping and limiting by the rollers 736 effectively suppresses the angular deformation of the cover plates caused by the cooling and shrinkage of the weld. There is no need to use symmetrical welding or segmented skip welding process, which reduces the number of weld joints and arc starting and ending points, greatly reduces the workload of post-weld slag cleaning, grinding and appearance repair, shortens the subsequent processing time, and improves the welding quality and production efficiency.

[0072] When welding the middle section of the inclined surface of the grooves at both ends of the X-bracket 6, the relative positions of sliding column 1 712 and sliding column 2 731 are fixed in the initial state, and the rotating plate 735 does not rotate. When welding the inclined surfaces on both sides of the middle section, the rotating roller 736 contacts the inclined surface first, and then the guide rod 2 734 slides and guides inside the guide groove 717, causing sliding column 2 731 and U-shaped column 733 to slide relative to sliding column 1 712. The tension spring 2 732 coordinates the extension and retraction adjustment. Sliding column 2 731 drives the rotating plate 735 to rotate around the positioning pin 738. The rotating plate 735 drives the rotating roller 736 to move synchronously. At the same time, the rotating plate 735 drives the rotating plate 715 to rotate around the guide plate 714 through the positioning pin 738. The rotating plate 715 drives the fixed plate 72. 1. The connecting rod 722 deflects synchronously, causing the output end of the welding head 724 to rotate toward the welding slope. The limiting groove 737 restricts the rotation stroke of the positioning pin 738, ensuring that the welding head 724 maintains an effective welding angle with the welding surface. This avoids the situation where the fixing plate 721 abuts against the welding surface, preventing the welding head 724 from being unable to contact the welding surface. This achieves precise and continuous welding at the slope position. Relying on the adaptive adjustment of the deflection component 73, the welding head 724 can deflect precisely in real time with the slope angle, adapting to the continuous welding requirements of the complex slope weld of the X-bracket 6. This ensures uniform weld penetration and regular forming, eliminates angle deviation and welding blind spots during slope welding, further improves welding accuracy and welding continuity, and ensures the overall welding quality stability of the X-bracket 6.

[0073] Finally, the welded parts are quenched as a whole to completely eliminate internal stress.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An intelligent welding device for an excavator underframe, characterized in that: Includes a base (1), a fixing seat (2) disposed on the outer wall of the base (1); and, The turntable (3) sleeved outside the fixed base (2), the X-bracket (6) placed outside the turntable (3), and the continuous welding device (7) disposed between the turntable (3) and the X-bracket (6) include a guide assembly (71) disposed between the turntable (3) and the top seat (4), a welding assembly (72) disposed between the guide assembly (71) and the positioning plate (5), and a deflection assembly (73) disposed between the welding assembly (72) and the guide assembly (71); wherein, The guide assembly (71) includes a base plate (716) sleeved on the outside of the top seat (4) and a guide plate (714) disposed on the outside of the base plate (716); and, The welding assembly (72) includes a guide rod (723) disposed within the base plate (716) and a welding head (724) disposed outside the base plate (716); and, The deflection assembly (73) includes a rotating roller (736) disposed outside the base plate (716) and a rotating plate (735) disposed outside the guide plate (714).

2. The intelligent welding device for the excavator underframe as described in claim 1, characterized in that: The outer wall of the fixed seat (2) is provided with a top seat (4), and the end of the top seat (4) is provided with a positioning plate (5). The X bracket (6) is provided on the positioning plate (5). The guide assembly (71) also includes a fixing block (711). The outer wall of the turntable (3) is provided with a fixing block (711). A sliding column (712) is inserted into the inside of the fixing block (711). A tension spring (713) is sleeved on the outside of the sliding column (712). The outer wall of the guide plate (714) is provided with a rotating plate (715). The outer wall of the base plate (716) is provided with a guide groove (717).

3. The intelligent welding device for the excavator underframe as described in claim 2, characterized in that: The base plate (716) is fitted outside the top seat (4), the guide groove (717) matches the welding path of the X-frame and web plate in the X-bracket (6), the X-bracket (6) is set on the outer wall of the positioning plate (5), the X-bracket (6) and the positioning plate (5) are matched in shape, and the outer wall of the positioning plate (5) is provided with a positioning frame (51).

4. The intelligent welding device for the excavator underframe as described in claim 2, characterized in that: The welding assembly (72) further includes a fixing plate (721), the end of the rotating plate (715) is provided with a fixing plate (721), and the outer wall of the fixing plate (721) is provided with a connecting rod (722).

5. The intelligent welding device for the excavator underframe as described in claim 4, characterized in that: The end of the first guide rod (723) is disposed on the outer wall of the connecting rod (722). The end of the first guide rod (723) is arc-shaped. The connecting rod (722) is "L"-shaped. There are two welding heads (724). The first guide rod (723) is disposed inside the guide groove (717).

6. The intelligent welding device for the excavator underframe as described in claim 4, characterized in that: The deflection assembly (73) further includes a sliding post 2 (731), the sliding post 2 (731) is inserted into the inside of the fixed block (711), a tension spring 2 (732) is sleeved on the outside of the sliding post 2 (731), a U-shaped post (733) is provided at the end of the sliding post 2 (731), a guide rod 2 (734) is provided at the end of the U-shaped post (733), a positioning pin (738) is provided inside the rotating plate (735), and a limit groove (737) is opened on the surface of the guide plate (714).

7. The intelligent welding device for the excavator underframe as described in claim 6, characterized in that: The positioning pin (738) is located inside the limiting groove (737), and the end of the positioning pin (738) is located on the outer wall of the rotating plate (715).

8. The intelligent welding device for the excavator underframe as described in claim 6, characterized in that: The number of the sliding column (731), tension spring (732), U-shaped column (733), guide rod (734) and rotating roller (736) are all two. The diameter of the middle section of the rotating roller (736) is smaller than the diameter of the two ends. The end of the guide rod (734) is located inside the guide groove (717). The rotating roller (736) is located between the two cover plates of the X bracket (6).

9. The intelligent welding device for the excavator underframe as described in claim 1, characterized in that: The outer wall of the base (1) is provided with a drive motor (8), the output end of the 8) is provided with a drive gear (9), the bottom of the turntable (3) is provided with an internal gear ring (10), and a bearing is provided at the connection between the fixed seat (2) and the turntable (3).

10. An intelligent welding method, characterized in that: Including the intelligent welding device for the underframe as described in claim 9, and, S1 workpiece positioning: The X bracket (6) is placed on the surface of the positioning plate (5) by the hoisting equipment. The X bracket (6) is pushed from the end away from the fixed block (711) so that the three sides of the X bracket (6) are in contact with the inner wall of the positioning frame (51) to complete the positioning of the X bracket (6). At this time, the output ends of the two welding heads (724) are aligned with the connection between the upper and lower cover plates and the web plate of the X bracket (6). The rotating roller (736) is placed between the upper and lower cover plates and in contact with the surface of the cover plates. S2 Equipment Start-up: Start the drive motor (8), the drive motor (8) drives the drive gear (9) to mesh with the internal gear ring (10), and drives the turntable (3) to rotate counterclockwise around the fixed seat (2); S3 Continuous Straight Edge Welding: The turntable (3) drives the welding assembly (72) and the deflection assembly (73) to rotate synchronously through the fixed block (711), sliding column one (712), guide plate (714), and rotating plate (715). The guide rod one (723) is guided along the guide groove (717) of the bottom plate (716), so that the welding head (724) is continuously welded along the connection between the upper and lower cover plates and the web plate. At the same time, the guide rod two (734) is guided along the guide groove (717), which drives the rotating roller (736) to move synchronously with the welding head (724). The rotating roller (736) clamps and limits the upper and lower cover plates in real time to suppress the corner deformation of the cover plate caused by the cooling and shrinkage of the weld. S4 sloping adaptive welding: When welding to the sloping grooves at both ends of the X bracket (6), the rotating roller (736) first contacts the sloping surface, and the second guide rod (734) slides in the guide groove (717), driving the second sliding column (731) and the U-shaped column (733) to slide relative to the first sliding column (712), and the second tension spring (732) adjusts the extension and retraction; the second sliding column (731) drives the rotating plate (735) to rotate around the positioning pin (738), and the rotating plate (735) synchronously drives the rotating roller (736) to move, and drives the rotating plate (715) to rotate around the guide plate (714) through the positioning pin (738); the rotating plate (715) drives the fixed plate (721) and the connecting rod (722) to deflect, so that the welding head (724) turns precisely with the sloping angle, and the limiting groove (737) limits the rotation stroke of the positioning pin (738) to ensure that the welding head (724) maintains an effective welding angle with the sloping surface, and completes the continuous welding of the sloping surface; S5 Welding Finishing: After the X bracket (6) has been welded around the entire circle, turn off the drive motor (8), stop the turntable (3) from rotating, and after the workpiece has cooled down, remove the welded X bracket (6) to complete the welding operation.

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