Submerged-arc welding equipment for fabricated steel structure machining

Abstract

The invention discloses submerged-arc welding equipment for fabricated steel structure machining, and relates to the technical field of steel structure welding, the submerged-arc welding equipment comprises a gantry manipulator, and a cross beam of the gantry manipulator is provided with two transverse moving modules; a vertical moving module is fixed to the moving end of the transverse moving module. A floating mechanism is arranged at the moving end of the vertical moving module; the floating mechanism comprises a floating structure, the floating structure comprises a transverse plate, a support and two right-angle plates, a hydraulic mechanism is arranged between the moving end of the vertical moving module and the middle position of the transverse plate, a rectangular opening is formed in the bottom plate face of the transverse plate, and a sliding structure enabling the support to move is arranged in the rectangular opening. The two ends of the support are fixed to the inclined plates of the two right-angle plates respectively, and the right-angle plates are isosceles right-angle plates. By means of the dynamic compensation mode, the welding assembly is aligned with the welding seam, and therefore normal operation of the welding process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure welding, and in particular to a submerged arc welding device for processing assembled steel structures. Background Art

[0002] H-shaped steel is an important part of assembled steel structures; due to its unique "H" shape structure, H-shaped steel has attracted much attention and has excellent bending and shear resistance performance, and is widely used in various building structures; in assembled steel structures, H-shaped steel is often used to make the main frame and is connected and fixed to other components by means of high-strength bolts or welding.

[0003] After retrieval, the patent document with the authorization announcement number CN109746551A discloses a fully automatic reciprocating submerged arc welding machine for steel structures, which is characterized in that: it includes a Y-axis track, a gantry, a first driving mechanism, an X-axis slide rail, an X-direction slide seat, a second driving mechanism, a Z-axis slide rail, a third driving mechanism and a submerged arc welding machine body. The gantry is arranged on the Y-axis track; the first driving mechanism is used to drive the gantry to displace along the Y-axis track; the X-axis slide rail is fixedly arranged on the cross beam of the gantry; the X-direction slide seat is slidably matched with the X-axis slide rail; the second driving mechanism is used to drive the X-direction slide seat to displace along the X-axis slide rail; the Z-direction slide seat is slidably matched with the X-direction slide seat through a Z-axis slide; the third driving mechanism is used to drive the Z-direction slide seat to displace along the Z-axis slide rail; the submerged arc welding machine body is arranged on the Z-direction slide seat. This patent can complete the welding work automatically, quickly, accurately and standardly, and the whole operation is completely automated, which can improve production efficiency and safety.

[0004] Based on the retrieval and the existing technology, it is found that: in order to improve the welding efficiency, factories generally choose to use a robotic arm for operation, such as the above-mentioned gantry robotic arm (also known as gantry manipulator). The welding torch is fixedly arranged at the operating end of the robotic arm. The gantry robotic arm positions the welding torch vertically at the weld of the H-shaped steel and aligns the welding torch with the weld, and then drives the welding torch to move linearly along the weld. However, after the gantry robotic arm works for a long time, the internal parts of the transverse movement module on the cross beam of the gantry robotic arm are worn, causing the welding torch to be misaligned with the weld (the misalignment distance is small), so that the welding work cannot be carried out, and the gantry robotic arm needs to be repaired or re-adjusted. Summary of the Invention

[0005] The purpose of the present invention is to provide a submerged arc welding device for processing assembled steel structures to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: a submerged arc welding device for processing assembled steel structures, including a gantry manipulator, and two transverse movement modules are arranged on the cross beam of the gantry manipulator;

[0007] The mobile end of the lateral movement module is fixed with a vertical movement module;

[0008] The mobile end of the vertical movement module is provided with a floating mechanism;

[0009] The floating mechanism includes a floating structure, and the floating structure includes a transverse plate, a bracket and two right-angle plates. A hydraulic mechanism is arranged between the mobile end of the vertical movement module and the middle position of the transverse plate. A rectangular opening is formed in the bottom plate surface of the transverse plate, and a sliding structure for moving the bracket is arranged inside the rectangular opening. Both ends of the bracket are respectively fixed to the inclined plates of the two right-angle plates, and the right-angle plates are isosceles right-angle plates;

[0010] A welding component for submerged arc welding is arranged at the top of the bracket.

[0011] Preferably, the vertical movement module includes a screw lift, a clutch mechanism and a servo motor. The screw lift and the servo motor are both fixed on the mobile end of the lateral movement module. The clutch mechanism consists of two mutually meshing jaw clutch discs, and the two mutually meshing jaw clutch discs are respectively named as the first clutch disc and the second clutch disc. The output shaft of the servo motor is coaxially fixed to the first clutch disc. A spline sleeve is coaxially arranged and fixed on the disc surface of the second clutch disc. A first spline shaft is slidably inserted into the sleeve of the spline sleeve. The input shaft of the screw lift is coaxially fixed to the first spline shaft.

[0012] Preferably, the hydraulic mechanism includes a first hydraulic structure and a second hydraulic structure. The first hydraulic structure is arranged between the second clutch disc and the screw lift, and the second hydraulic structure is arranged between the mobile end of the vertical movement module and the top of the transverse plate.

[0013] Preferably, the first hydraulic structure includes a first piston cylinder, a first piston rod, a first piston plate and a connecting plate. A rotating hole is formed in the middle of the connecting plate. The whole spline sleeve is rotatably installed in the rotating hole. The first piston cylinder is fixed to the screw lift. One end of the first piston rod is slidably inserted into one end of the first piston cylinder, and the end of the first piston rod located inside the first piston cylinder is fixed to the first piston plate. The first piston plate is slidably arranged inside the first piston cylinder.

[0014] Preferably, the second hydraulic structure includes a second piston cylinder, a second spline shaft, a limiting ring, a buffer spring and a second piston plate. One end of the second spline shaft is coaxially fixed with the screw of the screw lift. One end of the second piston cylinder is fixed at the middle position of the cross plate. The whole of the second spline shaft is slidably inserted into the other end of the second piston cylinder. The second piston plate is slidably arranged in the second piston cylinder and is fixed to the second spline shaft. The whole of the buffer spring is arranged in the second piston cylinder. The two ends of the buffer spring are respectively in contact with the second piston plate and the inner wall of the bottom end of the second piston cylinder. The whole of the limiting ring is arranged in the second piston cylinder and is coaxially fixed with the second piston cylinder, and the limiting ring is located at the top of the second piston plate.

[0015] Preferably, a communication structure is arranged between the first piston cylinder and the second piston cylinder. The communication structure includes a first communication pipe, a second communication pipe and a corrugated pipe. The two ends of the corrugated pipe are coaxially fixed and communicated with the first communication pipe and the second communication pipe respectively. One end of the first communication pipe is communicated with the end of the first piston cylinder away from the connecting plate. One end of the second communication pipe is communicated with the top end of the second piston cylinder.

[0016] Preferably, the sliding structure includes a guide rod and a slider. The two ends of the guide rod are respectively fixed at the two ends of the rectangular opening. The whole of the slider is slidably sleeved on the guide rod, and the slider is in contact with the inner walls on both sides of the rectangular opening. The middle position at the top of the other end of the bracket is fixed to the slider. Return springs are sleeved at both ends of the guide rod, and the return springs are respectively located on both sides of the slider.

[0017] Preferably, notches are formed in both right-angle plates of the right-angle plate. A rolling roller is rotatably installed on the inner walls at both ends of the notch. An arc-shaped notch is formed at the bottom of the right-angle end of the right-angle plate.

[0018] Preferably, the welding assembly includes a wire feeding gun, a flux conduit and an electrode gun. The wire feeding gun, the flux conduit and the electrode gun are all fixed to the bracket. The wire feeding gun, the flux conduit and the electrode gun are collinear and located at the right angle of the right-angle plate. The electrode gun is located in front of the triangular plate and is inclined. The wire feeding gun is arranged vertically. The flux conduit is inclined and located between the wire feeding gun and the electrode gun. The bottom end of the flux conduit is close to the bottom end of the wire feeding gun.

[0019] Preferably, the welding assembly further includes a flux storage tank, a solenoid valve and a wire feeder. The flux storage tank is arranged on the top of the bracket and is in a funnel shape. The two ends of the solenoid valve are respectively fixed and communicated with the flux conduit and the flux storage tank. The whole of the wire feeder is arranged on the top of the bracket and is fixed to the bracket. The wire feeder feeds the welding wire into the interior of the wire feeding gun, and the welding wire passes out from the bottom of the wire feeding gun.

[0020] The present invention provides a submerged arc welding device for the processing of prefabricated steel structures. Compared with the prior art, it has the following improvements and advantages:

[0021] First: The floating structure of the present invention is composed of a horizontal plate and a straight triangular plate. The operating end of the gantry manipulator is fixed to the horizontal plate, and the horizontal plate is arranged horizontally. The inclined plate of the straight triangular plate is flush with the bottom of the horizontal plate, and a sliding structure for relative sliding between the two is provided therebetween. The welding assembly for submerged arc welding is arranged at the right angle of the straight triangular plate. When the entire welding assembly is moved down to the weld seam, if the welding assembly cannot be aligned with the weld seam, one of the right-angled sides of the straight triangular plate must contact the H-shaped steel. The straight triangular plate slides on the horizontal plate until the two right-angled plates of the straight triangular plate contact the H-shaped steel. At this time, the welding assembly is aligned with the weld seam. Thus, it can be seen that the present invention aligns the welding assembly with the weld seam through a dynamic compensation method, thereby ensuring the normal progress of the welding process.

[0022] Second: The vertical movement module of the gantry manipulator of the present invention is a screw lift. A clutch mechanism is provided between the output shaft of the motor for driving the screw lift and the input shaft of the screw lift. One end of the screw rod in the screw lift located outside (this end is the operating end of the entire gantry manipulator) and the horizontal plate are provided with a hydraulic mechanism. This hydraulic mechanism can buffer, and at the same time, when the hydraulic pressure is too high, the hydraulic mechanism will control the clutch mechanism, and the clutch mechanism disconnects the output shaft of the motor from the input shaft of the screw lift, so that the screw rod cannot move, preventing the screw rod from protruding excessively and damaging the floating structure and the welding assembly. At the same time, during the trial adjustment process, if the welding assembly deviates too much, and the straight triangular plate slides on the horizontal plate to the maximum extent, the continued downward movement of the threaded rod will also cause the hydraulic pressure in the hydraulic mechanism to be too high, and then the screw rod cannot move. Therefore, it can also be protected during the trial adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a working schematic diagram of the present invention;

[0025] Figure 2 It is a three-dimensional structure schematic diagram of the vertical movement module, the welding assembly, the floating structure and the hydraulic mechanism of the present invention;

[0026] Figure 3Schematic three-dimensional structure diagram of the vertical movement module and the hydraulic mechanism of the present invention;

[0027] Figure 4 Cross-sectional view of the hydraulic mechanism of the present invention;

[0028] Figure 5 For Figure 4 Enlarged structure diagram at position A;

[0029] Figure 6 For Figure 4 Enlarged structure diagram at position B;

[0030] Figure 7 Schematic three-dimensional structure diagram of the welding assembly of the present invention;

[0031] Figure 8 Side view of the welding assembly of the present invention;

[0032] Figure 9 Stereogram of the sliding structure of the present invention.

[0033] Reference numerals:

[0034] 1. Gantry manipulator; 2. Vertical movement module; 3. Bracket; 4. Right-angle plate; 5. Rolling roller; 6. Notch; 7. Screw jack; 8. First spline shaft; 9. Spline sleeve; 10. Second clutch disc; 11. First clutch disc; 12. Servo motor; 13. Bellows; 14. Second spline shaft; 15. Limit ring; 16. Second piston plate; 17. Buffer spring; 18. Second communication pipe; 19. Connecting plate; 20. First communication pipe; 21. First piston cylinder; 22. First piston plate; 23. First piston rod; 24. Electrode gun; 25. Solenoid valve; 26. Flux storage tank; 27. Wire feeder for welding wire; 28. Wire feeding gun; 29. Flux conduit; 30. Slide block; 31. Guide rod; 32. Return spring. Detailed implementation manners

[0035] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention provides a submerged arc welding device for processing prefabricated steel structures through improvement. The technical solution of the present invention is as follows:

[0037] As Figures 1 to 9As shown in the figure, an automatic submerged arc welding device for the processing of prefabricated steel structures provided by an embodiment of the present invention includes a gantry manipulator 1. Here, a supplementary description is given to the gantry manipulator 1. The gantry manipulator 1 is of a type with a built-in traveling mechanism, and this traveling mechanism is a prior art, so its specific structure and working principle will not be elaborated in detail here. Two transverse movement modules are provided on the crossbeam of the gantry manipulator 1;

[0038] A vertical movement module 2 is fixed to the moving end of the transverse movement module;

[0039] A floating mechanism is provided at the moving end of the vertical movement module 2;

[0040] The floating mechanism includes a floating structure, and the floating structure includes a cross plate, a bracket 3, and two right-angle plates 4. A hydraulic mechanism is provided between the moving end of the vertical movement module 2 and the middle position of the cross plate. A rectangular opening is provided on the bottom plate surface of the cross plate, and a sliding structure for moving the bracket 3 is provided inside the rectangular opening. Both ends of the bracket 3 are fixed to the inclined plates of the two right-angle plates 4, and the right-angle plates 4 are isosceles right-angle plates 4;

[0041] A welding assembly for submerged arc welding is provided at the top of the bracket 3;

[0042] A supplementary description of the above is as follows: Two symmetrically arranged diagonal braces with an inclination angle of 45 degrees are provided inside the gantry of the gantry manipulator 1 (refer to the patent document with the authorization announcement number CN109746551A), and the H-shaped steel is placed on the diagonal braces;

[0043] From the above connection relationship, the technical solution of the present invention can be known as follows: The floating structure is composed of a cross plate and a right-angled triangular plate. The operating end of the gantry manipulator 1 is fixed to the cross plate and the cross plate is arranged horizontally. The inclined plate of the right-angled triangular plate is flush with the bottom of the cross plate and a sliding structure for relative sliding between the two is provided therebetween. The welding assembly for submerged arc welding is arranged at the right angle of the right-angled triangular plate. When the entire welding assembly is moved down to the weld, if the welding assembly cannot be aligned with the weld, one of the right-angled sides of the right-angled triangular plate will necessarily contact the H-shaped steel. The right-angled triangular plate slides on the cross plate until the two right-angle plates 4 of the right-angled triangular plate contact the H-shaped steel. At this time, the welding assembly is aligned with the weld. Thus, it can be seen that the present invention makes the welding assembly aligned with the weld through a dynamic compensation method, thereby ensuring the normal progress of the welding process.

[0044] Specifically, in combination with the attached Figure 3 and the attached Figure 4As shown in the figure, the vertical movement module 2 includes a screw elevator 7, a clutch mechanism, and a servo motor 12. The screw elevator 7 and the servo motor 12 are both fixed on the moving end of the horizontal movement module. The clutch mechanism consists of two mutually meshing jaw clutch discs. The two mutually meshing jaw clutch discs are respectively named the first clutch disc 11 and the second clutch disc 10. The output shaft of the servo motor 12 is coaxially fixed with the first clutch disc 11. A spline sleeve 9 is coaxially arranged and fixed on the disc surface of the second clutch disc 10. A first spline shaft 8 is slidably inserted into the sleeve of the spline sleeve 9. The input shaft of the screw elevator 7 is coaxially fixed with the first spline shaft 8;

[0045] To supplement the description of the clutch mechanism, the jaw clutch is selected for the clutch mechanism here, which only provides a clutch method and can be replaced by other methods of this clutch mechanism;

[0046] The working process of the vertical movement module 2 is as follows: At this time, the servo motor 12 rotates the first clutch disc 11 through the output shaft. The first clutch disc 11 drives the spline sleeve 9 to rotate through the second clutch disc 10 meshing with it. The spline sleeve 9 drives the first spline shaft 8 to rotate. The first spline shaft 8 drives the input shaft of the screw elevator 7, and the screw on the screw elevator 7 moves downward.

[0047] Specifically, in combination with the attached Figure 3 - attached Figure 6As shown, the hydraulic mechanism includes a first hydraulic structure and a second hydraulic structure. The first hydraulic structure is arranged between the second clutch disc 10 and the screw elevator 7, and the second hydraulic structure is arranged between the moving end of the vertical moving module 2 and the top of the cross plate. The first hydraulic structure includes a first piston cylinder 21, a first piston rod 23, a first piston plate 22 and a connecting plate 19. A rotation hole is generally formed in the connecting plate 19, and the spline sleeve 9 is integrally rotatably installed in the rotation hole. The first piston cylinder 21 is fixed to the screw elevator 7. One end of the first piston rod 23 is slidably inserted into one end of the first piston cylinder 21, and the end of the first piston rod 23 located inside the first piston cylinder 21 is fixed to the first piston plate 22. The first piston plate 22 is slidably arranged in the first piston cylinder 21. The second hydraulic structure includes a second piston cylinder, a second spline shaft 14, a limiting ring 15, a buffer spring 17 and a second piston plate 16. One end of the second spline shaft 14 is coaxially fixed to the screw of the screw elevator 7. One end of the second piston cylinder is fixed to the middle position of the cross plate. The whole of the second spline shaft 14 is slidably inserted into the other end of the second piston cylinder. The second piston plate 16 is slidably arranged in the second piston cylinder and is fixed to the second spline shaft 14. The whole of the buffer spring 17 is arranged in the second piston cylinder, and the two ends of the buffer spring 17 are respectively in contact with the second piston plate 16 and the inner wall of the bottom end of the second piston cylinder. The whole of the limiting ring 15 is arranged in the second piston cylinder and is coaxially fixed to the second piston cylinder, and the limiting ring 15 is located above the second piston plate 16. A communication structure is arranged between the first piston cylinder 21 and the second piston cylinder. The communication structure includes a first communication pipe 20, a second communication pipe 18 and a corrugated pipe 13. The two ends of the corrugated pipe 13 are respectively coaxially fixed to and communicated with the first communication pipe 20 and the second communication pipe 18. One end of the first communication pipe 20 is communicated with the end of the first piston cylinder 21 away from the connecting plate 19, and one end of the second communication pipe 18 is communicated with the top end of the second piston cylinder;

[0048] Supplementary description of the above hydraulic mechanism: Hydraulic oil is arranged between the first piston cylinder 21 and the first piston plate 22 and between the second piston cylinder and the second piston plate 16;

[0049] The working process of the hydraulic mechanism is as follows: The threaded rod continues to move downward. At this time, the straight triangular plate cannot move at the right angle of the H-shaped steel. The threaded rod pushes the second spline shaft 14 into the second piston cylinder. The second spline shaft 14 drives the second piston plate 16 to move downward. The second piston plate 16 compresses the buffer spring 17, and the buffer spring 17 buffers. At this time, a negative pressure is generated at the top of the second piston cylinder, sucking the hydraulic oil in the first piston cylinder 21 into the second piston cylinder. At this time, the first piston plate 22 in the first piston cylinder 21 moves. The first piston plate 22 pulls the connecting plate 19 through the piston rod. The connecting plate 19 pulls the second clutch disc 10 away from the first clutch disc 11 until the first clutch disc 11 and the second clutch disc are separated from each other. At this time, the screw rod cannot move, preventing the screw rod from extending excessively and damaging the floating structure and the welding assembly, and at the same time preventing the servo motor 12 from being overloaded.

[0050] Specifically, in combination with the attached Figure 3 - attached Figure 9 As shown, the sliding structure includes a guide rod 31 and a slider 30. The two ends of the guide rod 31 are respectively fixed at the two ends of the rectangular opening. The whole of the slider 30 is slidably sleeved on the guide rod 31, and the slider 30 is in contact with the inner walls on both sides of the rectangular opening. The middle position at the top of the other end of the bracket 3 is fixed to the slider 30. Return springs 32 are sleeved on both ends of the guide rod 31, and the return springs 32 are respectively located on both sides of the slider 30; The bracket 3 and the right-angled plate 4 on the upper bottom end of the screw rod move downward with the screw rod. If the welding assembly on the bracket 3 is not aligned with the weld of the H-shaped steel (this offset distance is small, and if it is too large, workers can observe it with the naked eye), one of the right-angled sides of the straight triangular plate must be in contact with the H-shaped steel. The bracket 3 on the straight triangular plate slides on the cross plate, that is, the slider 30 on the bracket 3 moves linearly in the rectangular opening through the guide rod 31 until the two right-angled plates 4 of the straight triangular plate are in contact with the H-shaped steel. At this time, the welding assembly is aligned with the weld.

[0051] Specifically, in combination with the attached Figure 7 - attached Figure 9 As shown, concave openings 6 are formed in both right-angled plates 4 of the right-angled plate 4. A rolling roller 5 is rotatably installed on the inner walls at both ends of the concave opening 6. The setting of the rolling roller 5 changes the contact mode between the right-angled plate 4 and the H-shaped steel from static friction to rolling friction to reduce friction loss. An arc-shaped notch is formed at the bottom of the right-angled end of the right-angled plate 4. The setting of the arc-shaped notch is to prevent hindering the process of covering the welding flux.

[0052] Specifically, in combination with the attached Figure 7 and attached Figure 8As shown in the figure, the welding assembly includes a wire feeding gun 28, a flux conduit 29, and an electrode gun 24. The wire feeding gun 28, the flux conduit 29, and the electrode gun 24 are all fixed to the bracket 3. The wire feeding gun 28, the flux conduit 29, and the electrode gun 24 are collinear and located at the right angle of the right-angle plate 4. The electrode gun 24 is located in front of the triangular plate and is inclined. The wire feeding gun 28 is vertically arranged. The flux conduit 29 is inclined and located between the wire feeding gun 28 and the electrode gun 24. The bottom end of the flux conduit 29 is close to the bottom end of the wire feeding gun 28. The welding assembly further includes a flux storage tank 26, a solenoid valve 25, and a wire feeder 27. The flux storage tank 26 is arranged on the top of the bracket 3 and is in a funnel shape. The two ends of the solenoid valve 25 are respectively fixed to and communicated with the flux conduit 29 and the flux storage tank 26. The whole wire feeder 27 is arranged on the top of the bracket 3 and is fixed to the bracket 3. The wire feeder 27 feeds the welding wire into the interior of the wire feeding gun 28, and the welding wire passes through the bottom of the wire feeding gun 28;

[0053] A supplementary description of the welding assembly: The wire feeding gun 28, the flux conduit 29, and the electrode gun 24 are all prior arts, and the layout method is the same as that of the prior art. Reference can also be made to the patent document with the authorization announcement number CN109746551A;

[0054] The working process of the welding assembly is as follows: When it is not aligned with the weld seam, the gantry manipulator 1 moves through the traveling mechanism. At this time, the solenoid valve 25 is opened, the wire feeder 27 performs wire feeding work, the flux in the flux storage tank 26 flows to the weld seam through the flux conduit 29 to bury the weld seam, the wire feeder 27 feeds the welding wire into the interior of the wire feeding gun 28, and the welding wire passes through the bottom of the wire feeding gun 28 and enters the flux pile. The electrode gun 24 is electrified for submerged arc treatment.

[0055] Working principle:

[0056] There are two symmetrically arranged diagonal braces with an angle of 45 degrees in the gantry of the gantry manipulator 1 (reference the authorization announcement number CN109746551A), and the H-shaped steel is placed on the diagonal braces;

[0057] The two transverse movement modules on the crossbeam of the gantry manipulator 1 are started. The transverse movement module drives the vertical movement module 2 to move through the mobile end, so that the welding assembly on the vertical movement module 2 is aligned with the H-shaped steel;

[0058] At this time, the servo motor 12 rotates the first clutch disc 11 through the output shaft. The first clutch disc 11 drives the spline sleeve 9 to rotate through the meshing second clutch disc 10. The spline sleeve 9 drives the first spline shaft 8 to rotate. The first spline shaft 8 drives the input shaft of the screw jack 7, and the screw on the screw jack 7 moves downward;

[0059] The bracket 3 and the right-angle plate 4 on the upper bottom end of the screw rod move downward with the screw rod. If the wire feeder gun 28, the flux conduit 29, and the electrode gun 24 on the bracket 3 are not aligned with the H-shaped steel weld (the offset distance is small, and if it is too large, workers can observe it with the naked eye), one of the right-angle sides of the straight triangular plate must be in contact with the H-shaped steel. The bracket 3 on the straight triangular plate slides on the cross plate, that is, the slider 30 on the bracket 3 moves linearly through the guide rod 31 in the rectangular opening until the two right-angle plates 4 of the straight triangular plate are in contact with the H-shaped steel. At this time, the welding assembly is aligned with the weld;

[0060] The threaded rod continues to move downward. At this time, the straight triangular plate cannot move at the right angle of the H-shaped steel. The threaded rod pushes the second spline shaft 14 into the second piston cylinder. The second spline shaft 14 drives the second piston plate 16 to move downward. The second piston plate 16 compresses the buffer spring 17, and the buffer spring 17 buffers. At this time, a negative pressure is generated at the top of the second piston cylinder, sucking the hydraulic oil in the first piston cylinder 21 into the second piston cylinder. At this time, the first piston plate 22 in the first piston cylinder 21 moves. The first piston plate 22 pulls the connecting plate 19 through the piston rod. The connecting plate 19 pulls the second clutch disc 10 away from the first clutch disc 11 until the first clutch disc 11 and the second clutch disc are separated from each other. At this time, the screw rod cannot move, preventing the screw rod from protruding excessively and damaging the floating structure and the welding assembly, and at the same time preventing the servo motor 12 from being overloaded;

[0061] During welding, the gantry manipulator 1 moves through the traveling mechanism. At this time, the solenoid valve 25 is opened, and the wire feeder 27 feeds wire. The flux in the flux storage tank 26 flows to the weld through the flux conduit 29 to bury the weld. The wire feeder 27 feeds the wire into the wire feeder gun 28, and the wire passes through the bottom of the wire feeder gun 28 and enters the flux pile. The electrode gun 24 is energized for submerged arc treatment;

[0062] When the welding is completed and the entire welding assembly and the triangular plate are removed, the buffer spring 17 resets, and the hydraulic oil is returned. At this time, the first clutch disc 11 and the second clutch disc 10 mesh with each other, so that the gantry manipulator 1 resets;

[0063] During debugging, if the welding assembly is offset too much, and at the same time the straight triangular plate slides on the cross plate to the maximum extent, the threaded rod continues to move downward will also cause the hydraulic pressure in the hydraulic mechanism to be too large, and then the screw rod cannot move. Therefore, it can also be protected during the trial adjustment process.

[0064] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic submerged arc welding device for the processing of prefabricated steel structures, comprising a gantry manipulator (1), characterized in that: The crossbeam of the gantry manipulator (1) is provided with two transverse movement modules; The moving end of the transverse movement module is fixed with a vertical movement module (2); The moving end of the vertical movement module (2) is provided with a floating mechanism; The floating mechanism includes a floating structure, and the floating structure includes a cross plate, a bracket (3) and two right-angle plates (4). A hydraulic mechanism is arranged between the moving end of the vertical movement module (2) and the middle position of the cross plate. A rectangular opening is formed in the bottom plate surface of the cross plate, and a sliding structure for moving the bracket (3) is arranged inside the rectangular opening. The two ends of the bracket (3) are respectively fixed to the inclined plates of the two right-angle plates (4), and the right-angle plates (4) are isosceles right-angle plates (4); The top of the bracket (3) is provided with a welding assembly for submerged arc welding.

2. The submerged arc welding device for the processing of assembled steel structures according to claim 1, wherein: The vertical movement module includes a screw jack (7), a clutch mechanism and a servo motor (12). The screw jack (7) and the servo motor (12) are both fixed on the moving end of the transverse movement module. The clutch mechanism is composed of two meshing jaw clutch discs. The two meshing jaw clutch discs are respectively named the first clutch disc (11) and the second clutch disc (10). The output shaft of the servo motor (12) is coaxially fixed to the first clutch disc (11). A spline sleeve (9) arranged coaxially therewith is fixed on the disc surface of the second clutch disc (10). A first spline shaft (8) is slidably inserted into the sleeve of the spline sleeve (9). The input shaft of the screw jack (7) is coaxially fixed to the first spline shaft (8).

3. The submerged arc welding equipment for the processing of prefabricated steel structures according to claim 2, characterized in that: The hydraulic mechanism includes a first hydraulic structure and a second hydraulic structure. The first hydraulic structure is arranged between the second clutch disc (10) and the screw jack (7). The second hydraulic structure is arranged between the moving end of the vertical movement module (2) and the top of the cross plate.

4. An automatic submerged arc welding device for the processing of prefabricated steel structures according to claim 3, characterized in that: The first hydraulic structure includes a first piston cylinder (21), a first piston rod (23), a first piston plate (22) and a connecting plate (19). A rotation hole is formed in the middle of the connecting plate (19). The whole spline sleeve (9) is rotatably installed in the rotation hole. The first piston cylinder (21) is fixed to the screw jack (7). One end of the first piston rod (23) is slidably inserted into one end of the first piston cylinder (21), and the end of the first piston rod (23) located inside the first piston cylinder (21) is fixed to the first piston plate (22). The first piston plate (22) is slidably arranged inside the first piston cylinder (21).

5. An automatic submerged arc welding device for the processing of prefabricated steel structures according to claim 4, characterized in that: The second hydraulic structure includes a second piston cylinder, a second spline shaft (14), a limiting ring (15), a buffer spring (17), and a second piston plate (16). One end of the second spline shaft (14) is coaxially fixed with the screw of the screw lift (7). One end of the second piston cylinder is fixed at the middle position of the cross plate. The whole of the second spline shaft (14) is slidably inserted into the other end of the second piston cylinder. The second piston plate (16) is slidably arranged in the second piston cylinder and is fixed to the second spline shaft (14). The whole of the buffer spring (17) is arranged in the second piston cylinder. The two ends of the buffer spring (17) are respectively in contact with the second piston plate (16) and the inner wall of the bottom end of the second piston cylinder. The whole of the limiting ring (15) is arranged in the second piston cylinder and is coaxially fixed with the second piston cylinder, and the limiting ring (15) is located at the top of the second piston plate (16).

6. The submerged arc welding equipment for the processing of prefabricated steel structures according to claim 5, characterized in that: A communication structure is arranged between the first piston cylinder (21) and the second piston cylinder. The communication structure includes a first communication pipe (20), a second communication pipe (18), and a corrugated pipe (13). The two ends of the corrugated pipe (13) are respectively coaxially fixed and communicated with the first communication pipe (20) and the second communication pipe (18). One end of the first communication pipe (20) is communicated with the end of the first piston cylinder (21) away from the connecting plate (19). One end of the second communication pipe (18) is communicated with the top end of the second piston cylinder.

7. An automatic submerged arc welding device for the processing of prefabricated steel structures according to claim 1, characterized in that: The sliding structure includes a guide rod (31) and a slider (30). The two ends of the guide rod (31) are respectively fixed at the two ends of the rectangular opening. The whole of the slider (30) is slidably sleeved on the guide rod (31), and the slider (30) is in contact with the inner walls on both sides of the rectangular opening. The other end of the bracket (3) is fixed to the middle position at the top of the slider (30). Return springs (32) are sleeved on both ends of the guide rod (31), and the return springs (32) are respectively located on both sides of the slider (30).

8. The submerged arc welding equipment for the processing of prefabricated steel structures according to claim 1, characterized in that: Notches (6) are formed in both right-angle plates (4) of the right-angle plate (4). A rolling roller (5) is rotatably installed on the inner walls at both ends of the notch (6). An arc-shaped notch is formed at the bottom of the right-angle end of the right-angle plate (4).

9. An automatic submerged arc welding device for processing prefabricated steel structures according to claim 1, characterized in that: The welding assembly includes a wire feeder gun (28), a flux conduit (29), and an electrode gun (24). The wire feeder gun (28), the flux conduit (29), and the electrode gun (24) are all fixed to the bracket (3). The wire feeder gun (28), the flux conduit (29), and the electrode gun (24) are collinear and located at the right angle of the right-angle plate (4). The electrode gun (24) is located in front of the triangular plate and is inclined. The wire feeder gun (28) is vertically arranged. The flux conduit (29) is inclined and located between the wire feeder gun (28) and the electrode gun (24). The bottom end of the flux conduit (29) is close to the bottom end of the wire feeder gun (28).

10. An automatic submerged arc welding device for the processing of prefabricated steel structures according to claim 9, characterized in that: The welding assembly further includes a flux storage tank (26), a solenoid valve (25), and a wire feeder (27). The flux storage tank (26) is arranged on the top of the bracket (3), and the flux storage tank (26) is funnel-shaped. The two ends of the solenoid valve (25) are respectively fixed and communicated with a flux conduit (29) and the flux storage tank (26). The whole wire feeder (27) is arranged on the top of the bracket (3) and fixed to the bracket (3). The wire feeder (27) feeds the welding wire into the inside of a wire feeding gun (28), and the welding wire passes out from the bottom of the wire feeding gun (28).

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