Rapid treatment and recovery use method for blockage of laser wire filling welding nozzle

Abstract

The invention discloses a rapid treatment and recovery use method for blockage of a laser wire filling welding nozzle. The rapid treatment and recovery use method comprises the following steps that S1, the boundary dimension of a transition guide pipe on the nozzle is machined; s2, preparing a T-shaped socket spanner and an open spanner; s3, the welding trolley reaches the parking position, and the nozzle is in an extending state; s4, welding slag particles on the nozzle are cleaned, and the welding wire is cut off; s5, the transition guide pipe is clamped through the open spanner, and the nozzle is unscrewed through the T-shaped socket spanner; s6, the nozzle is moved out of the guide wheel; s7, the transition guide pipe is clamped through the open spanner, and the new nozzle is tightened through the T-shaped socket spanner; and S8, enabling the new nozzle to be in a retraction state. According to the invention, the traditional means of disassembling the equipment body is changed to deal with abnormal conditions, so that the wire filling function can be quickly recovered, and meanwhile, the welding mechanical precision is not influenced by disassembling and assembling the guide wheel.

Description

Technical Field

[0001] This invention relates to metallurgical machinery / mechanical technology / rolling technology / mechanical transmission technology, and more specifically, to a method for rapidly treating and restoring the use of a laser wire filler welding nozzle that is clogged. Background Technology

[0002] Most steel mills currently use laser welding machines from the German company Mibach in their pickling and rolling mills. These machines are capable of filler wire welding. Filler wire welding is used to eliminate defects such as unstable gaps in the butt joints after steel coil shearing, thereby improving the overall weld strength. However, during normal production welding in the pickling and rolling mill, phenomena such as nozzle blockage and wire failure may suddenly occur when the welding wire is welding inside the guide wheel. Simultaneously, the detection system also reports abnormal morphology in the images (see...). Figure 1 The waveform shown in the Chinese box ultimately prevented the pickling and rolling mill from welding, forcing it to shut down.

[0003] If this situation occurs (when the welding wire nozzle is clogged), professional maintenance personnel are required to disassemble the welding wire feeding system (e.g., Figure 2 The guide wheel mechanism below (as shown) Figure 3 As shown in the image, after opening the guide wheel, continue removing the protective cover outside the wire feeding nozzle to disassemble the nozzle and remove the blocked welding wire. The entire process is cumbersome and time-consuming, requiring at least two hours, and the unit must be shut down to troubleshoot the problem. The specific steps are as follows:

[0004] 1) Disassemble the guide wheel;

[0005] 2) Remove the wire feeding nozzle protective cover inside the guide wheel;

[0006] 3) Cut away the welding slag clogging the nozzle head;

[0007] 4) Use an open-end wrench to remove the welding wire nozzle and pull out the blocked welding wire;

[0008] 5) Straighten the welding wire and re-thread it through the nozzle;

[0009] 6) Install a new wire feed nozzle;

[0010] 7) Install nozzle protective covers;

[0011] 8) Close the guide wheel.

[0012] Finally, a welding test was conducted to confirm the morphology of the filler wire in the weld. Once the condition was deemed satisfactory, production could proceed.

[0013] The traditional method to address this issue of nozzle blockage in laser welding machines involves opening the guide wheel mechanism, removing the nozzle protective cover and the nozzle itself, clearing the blockage in the welding wire, re-threading the wire, and installing a new nozzle to restore normal wire feeding. However, this method is time-consuming, requiring more than two hours to restore normal production, thus limiting the unit's capacity.

[0014] Furthermore, once such an anomaly occurs, a large amount of mechanical structure disassembly is required, which also introduces certain precision errors. This affects the parallelism, perpendicularity, and circumference of the welding machine guide wheel. The guide wheel has very high precision requirements, which can also bring certain uncontrollable factors to the welding quality of the laser welding machine.

[0015] In summary, once filler wire blockage occurs, it not only affects the unit's shutdown and production, but also affects the welding accuracy of the laser welding machine itself, posing a certain risk to the unit's subsequent production.

[0016] Currently, patent applications, such as patent application number 202311667674.2, disclose a spot-ring laser filler wire welding method, including the following steps: cleaning the surface and bevel of the welding plate, fixing the welding plate on a welding fixture; using a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding of the welding plate; adjusting the defocusing amount, setting the diameter of the circular spot, and setting the diameter of the annular spot; setting the power of the circular spot and the power of the annular spot; setting the welding speed and the wire feeding speed; starting the welding system to perform welding, selecting the number of welding passes until the welding plate completes the butt welding. However, this patented technology uses a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding.

[0017] For example, patent application number 201810445217.1 discloses a laser wire-filling welding device and method. The laser wire-filling welding device includes a laser welding head and a wire feeding mechanism. The wire feeding mechanism is fixedly mounted on the laser welding head and is used to feed the welding wire at an angle of 30° to 75° with the laser optical axis. However, this patented technology involves the specific angle of the welding wire, which is unrelated to the clogging of the wire-filling welding nozzle.

[0018] For example, patent application number 202311236733.0 discloses a laser wire-filling welding device and a laser wire-filling welding method. The laser wire-filling welding device preheats the welding wire to a predetermined temperature, reducing the temperature threshold range between the welding wire and the metal material. This causes the temperature field of the weld pool to change from intense to gentle, forming regular agitation and avoiding excessive free agitation of the weld pool. This further reduces metal spatter during welding and improves welding quality. This patented technology reduces the excessively large temperature threshold between the welding wire and the metal material, making the temperature field gentler, and is unrelated to nozzle clogging. Summary of the Invention

[0019] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a method for quickly handling and restoring the use of laser wire filler welding nozzle blockage. This method changes the traditional method of disassembling the equipment body to deal with abnormal situations, ensuring that the wire filler function can be quickly restored, while also ensuring that the welding mechanical precision is not affected by disassembling the guide wheel.

[0020] To achieve the above objectives, the present invention adopts the following technical solution:

[0021] A rapid method for treating and restoring the use of a clogged laser filler welding nozzle includes the following steps:

[0022] S1, machining the external dimensions of the transition conduit on the nozzle;

[0023] S2, Prepare a T-socket wrench and an open-end wrench;

[0024] S3, the welding carriage moves to the stop position, and the nozzle is in the extended state;

[0025] S4, clean the welding slag particles on the nozzle and cut the welding wire;

[0026] S5, use the open-end wrench to hold the transition conduit in place, and use the T-socket wrench to loosen the nozzle;

[0027] S6, move the nozzle out of the guide wheel;

[0028] S7, use the open-end wrench to hold the transition conduit in place, and use the T-socket wrench to tighten the new nozzle;

[0029] S8, the new nozzle is in the retracted state.

[0030] Preferably, step S1 specifically includes:

[0031] A pair of parallel surfaces are machined on the outer surface of the small-diameter end of the transition conduit.

[0032] Preferably, the distance between a pair of parallel surfaces is 9 mm ± 0.5 mm.

[0033] Preferably, in step S2, the length of the T-type socket wrench is 10cm±0.5cm, the outer diameter is 10mm+0 / -0.2mm, and the inner diameter is sufficient to insert and tighten an M8 hexagonal bolt.

[0034] The handle of the T-type socket wrench has a length of 5cm ± 0.2cm.

[0035] Preferably, step S3 specifically includes:

[0036] Move the welding carriage to the operating side of the pickling and rolling mill, and insert safety pins into the welding carriage and the upper guide wheel;

[0037] The nozzle is extended by clicking on the welding machine operation screen.

[0038] Preferably, step S4 specifically includes:

[0039] Insert the jaws of the pliers into the opening of the guide wheel, aim at the welding slag particles on the nozzle to clean them, and then feed the welding wire by pressing the wire feed button on the guide wheel, so that the welding wire and the slag particles are fed out together. Use the jaws of the pliers to cut the welding wire.

[0040] Preferably, step S5 specifically includes:

[0041] The open-end wrench is inserted into the opening of the guide wheel from the DS side, and locks the dimensional machining position on the transition guide tube;

[0042] The T-shaped socket wrench is inserted into the opening of the guide wheel from the WS side, and the head of the nozzle is tightened. The nozzle is then loosened by rotating it counterclockwise until the nozzle is completely detached from the transition guide.

[0043] Preferably, step S7 specifically includes:

[0044] The open-end wrench is inserted into the opening of the guide wheel from the DS side, and locks the dimensional machining position on the transition guide tube;

[0045] Place the new nozzle on the socket of the T-type socket wrench, insert the T-type socket wrench into the opening of the guide wheel from the WS side of the guide wheel, align the nozzle with the transition guide and rotate the nozzle clockwise until the nozzle is securely fastened to the transition guide.

[0046] Preferably, step S8 specifically includes:

[0047] The nozzle is retracted by clicking on the welding machine operation screen.

[0048] This invention provides a rapid treatment and restoration method for clogged laser filler welding nozzles. By pre-fabricating a specialized disassembly and assembly tool and utilizing the guide wheel mechanism of the laser welding machine, the equipment can be restored to normal operation without disassembly. For situations like wire blockage during filler welding in laser welding machines, this specialized tool can be cleverly used for rapid restoration (normal wire feeding can be restored in just 10 minutes). After the unit has been filled normally once, this method can be used for rapid treatment, providing a strong guarantee for subsequent normal production. It effectively and quickly improves the efficiency of abnormal handling, ensuring rapid restoration of the filler function while maintaining welding mechanical precision without disassembling the guide wheel. The test run was successful on the first attempt, and subsequent monitoring showed normal operation. It has strong practicality and scalability, meeting the needs of on-site abnormal handling. This invention has low overall investment cost, requires minimal modification, and generates high benefits. This technology can be applied to similar laser welding machines. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of weld morphology anomalies in images from existing detection systems;

[0050] Figure 2 This is a schematic diagram of an existing welding wire feeding system;

[0051] Figure 3 yes Figure 2 An enlarged view of position A in the middle;

[0052] Figure 4 This is a flowchart illustrating the rapid processing and recovery method of the present invention;

[0053] Figure 5 This is a schematic diagram of an existing transition conduit;

[0054] Figure 6 This is a schematic diagram of the dimensionally processed transition conduit in the rapid processing and recovery method of the present invention;

[0055] Figure 7 This is a schematic diagram of the T-type socket wrench used in the rapid processing and recovery method of the present invention;

[0056] Figure 8 This is a schematic diagram of the open-end wrench used in the rapid processing and recovery method of the present invention;

[0057] Figure 9 This is a schematic diagram of step S3 in the rapid processing and recovery method of the present invention;

[0058] Figure 10 This is a schematic diagram of step S4 in the rapid processing and recovery method of the present invention;

[0059] Figure 11This is a schematic diagram of step S5 in the rapid processing and recovery method of the present invention;

[0060] Figure 12 This is a schematic diagram of step S6 in the rapid processing and recovery method of the present invention;

[0061] Figure 13 This is a schematic diagram of step S7 in the rapid processing and recovery method of the present invention;

[0062] Figure 14 This is a schematic diagram of step S8 in the rapid processing and recovery method of the present invention. Detailed Implementation

[0063] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0064] Combination Figure 4 As shown, the present invention provides a method for rapid treatment and restoration of laser wire filler welding nozzle clogging, comprising the following steps:

[0065] S1, machining the external dimensions of the transition conduit on the nozzle;

[0066] S2, Prepare a T-socket wrench and an open-end wrench;

[0067] S3, the welding carriage moves to the stop position and the nozzle is extended;

[0068] S4, clean the welding slag particles on the nozzle and cut the welding wire;

[0069] S5, use an open-end wrench to hold the transition conduit in place, and use a T-socket wrench to loosen the nozzle;

[0070] S6, move the nozzle out of the guide wheel;

[0071] S7, use an open-end wrench to hold the transition conduit in place, and use a T-socket wrench to tighten the new nozzle;

[0072] S8 puts the new nozzle in the retracted state.

[0073] Combination Figure 5 and Figure 6 As shown, step S1 specifically includes:

[0074] Remove the transition conduit from the guide wheel and wipe it clean with a cleaning agent or cloth. Measure the diameter of the portion of the transition conduit that needs to be ground at the small-diameter end; it should be φ15mm (e.g., ...). Figure 5As shown in the image, mark the transition guide tube. Then, clamp the transition guide tube horizontally in a bench vise. Use a grinder to grind one side of the small-diameter end of the transition guide tube horizontally towards the large-diameter end. Control the grinding depth to about 1mm and the length to about 25mm. After grinding, grind the other side (the symmetrical side). During this process, the distance between the two ends being ground is confirmed using a flat ruler. Repeat the above process several times until the parallel distance between the two parallel surfaces is 9mm ± 0.5mm (e.g., ...). Figure 6 As shown in the image, the processing is complete.

[0075] Combination Figure 7 As shown, the length L1 of the T-type socket wrench is 10cm ± 0.5cm, and the length L2 of the handle of the T-type socket wrench is 5cm ± 0.2cm, which will not affect the convenience of operation.

[0076] The outer diameter of the T-type socket wrench is 10mm + 0 / - 0.2mm, which allows it to easily fit into the opening of the guide wheel.

[0077] The inner diameter of the head of the T-type socket wrench must be large enough to fit and tighten an M8 hex bolt without any lateral movement, thus preventing slippage when tightening the bolt.

[0078] Combination Figure 8 As shown, the open-end wrench is made by reprocessing a standard M8-M10 double open-end wrench. The opening of the M8 head is slightly ground with a grinder to increase the width from 8mm to 9mm, and the dimensions are confirmed with a steel ruler. The outer arc of the M9 head is ground flat to reduce the thickness, leaving a 2mm allowance on one side so that the open-end wrench can be inserted into the side of the guide wheel to clamp the transition guide.

[0079] Combination Figure 9 As shown, step S3 specifically includes:

[0080] Step S3 must be performed only after steps S1 and S2 have been completed.

[0081] Move the welding carriage to the operating side of the pickling and rolling mill, and insert safety pins on the welding carriage and the upper guide wheel to implement safety protection measures.

[0082] By clicking on the welding machine operation screen, selecting the wire feeding nozzle status interface, and clicking the "Adjust" button, the nozzle 1 in the middle of the guide wheel is in the extended state.

[0083] Combination Figure 10 As shown, step S4 specifically includes:

[0084] Insert the jaws of the pliers 2 into the opening of the guide wheel 3, clean the welding slag particles on the nozzle, and then feed the welding wire 4 by pressing the wire feeding button on the guide wheel 3, so that the welding wire 4 and the slag particles are fed out together for about 5cm. Use the jaws of the pliers 2 to cut the welding wire.

[0085] Combination Figure 11 As shown, step S5 specifically includes:

[0086] An open-end wrench 5 (9mm head) is inserted into the opening of the guide wheel 3 from the DS side, locking the dimension processing position (a pair of parallel surfaces) on the transition guide 6, preventing the transition guide 6 from rotating.

[0087] T-type socket wrench 7 (head position, used to insert M8 hex bolts) is inserted into the opening of guide wheel 3 from the WS side of guide wheel 3, aligned and tightened around the head of nozzle 1, and rotated counterclockwise to loosen nozzle 1 until nozzle 1 is completely detached from transition guide 6.

[0088] Combination Figure 12 As shown, step S6 specifically includes:

[0089] The T-shaped socket wrench 7 is placed around the nozzle 1 and slowly moved along the extension direction of the nozzle 1 to open the guide wheel 3. During the movement, care should be taken to prevent the nozzle 1 from falling off.

[0090] Combination Figure 13 As shown, step S7 specifically includes:

[0091] An open-end wrench 5 (9mm head) is inserted into the opening of the guide wheel 3 from the DS side, locking the dimension processing position (a pair of parallel surfaces) on the transition guide 6, preventing the transition guide 6 from rotating.

[0092] Place a new nozzle 1 on the socket (head position, used to insert an M8 hex bolt) of the T-socket wrench 7. Insert the T-socket wrench 7 into the opening of the guide wheel 3 from the WS side along the extension direction of the transition guide 6. Align the new nozzle 1 with the end thread of the transition guide 6 and rotate it clockwise until the nozzle 1 is completely tightened on the transition guide 6. Remove the open-end wrench 5 and the T-socket wrench 7.

[0093] Combination Figure 14 As shown, step S8 specifically includes:

[0094] Next, click on the welding machine operation screen, select the wire feed nozzle status interface, and click the "Retract" button to confirm that nozzle 1 is in the retracted state. Then click the "Feed Wire" button to feed the welding wire out of nozzle 1 by about 1 cm, and you can start normal welding operations.

[0095] In summary, this invention modifies the lower diameter of the transition conduit inside the guide wheel used to mount the nozzle, changing the original outer diameter... Machined until both ends are parallel and the outer diameter is Special tools can be inserted into the narrow opening on the guide wheel to disassemble the nozzle head (the opening size of the guide wheel is only about 10mm).

[0096] This invention utilizes a T-shaped socket wrench with an M8 hexagonal inner hole (which can be easily gripped and replaces human hands to loosen and tighten the wire feeding nozzle) and a special open wrench with a 9mm opening that can lock the "transition guide" of the wire feeding nozzle (which replaces human hands to hold and fix it when disassembling the nozzle) to perform the work of disassembling and assembling the nozzle inside the guide wheel.

[0097] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A method for rapidly treating and restoring the use of a laser filler wire welding nozzle that is clogged, characterized in that, Includes the following steps: S1, machining the external dimensions of the transition conduit on the nozzle; S2, Prepare a T-socket wrench and an open-end wrench; S3, the welding carriage moves to the stop position, and the nozzle is in the extended state; S4, clean the welding slag particles on the nozzle and cut the welding wire; S5, use the open-end wrench to hold the transition conduit in place, and use the T-socket wrench to loosen the nozzle; S6, move the nozzle out of the guide wheel; S7, use the open-end wrench to hold the transition conduit in place, and use the T-socket wrench to tighten the new nozzle; S8, the new nozzle is in the retracted state.

2. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S1 specifically includes: A pair of parallel surfaces are machined on the outer surface of the small-diameter end of the transition conduit.

3. The method for rapid treatment and restoration of use of laser wire filler welding nozzle blockage according to claim 2, characterized in that: The distance between a pair of parallel surfaces is 9mm ± 0.5mm.

4. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that: In step S2, the length of the T-type socket wrench is 10cm±0.5cm, the outer diameter is 10mm+0 / -0.2mm, and the inner diameter must be large enough to fit and tighten an M8 hex bolt. The handle of the T-type socket wrench has a length of 5cm ± 0.2cm.

5. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S3 specifically includes: Move the welding carriage to the operating side of the pickling and rolling mill, and insert safety pins into the welding carriage and the upper guide wheel; The nozzle is extended by clicking on the welding machine operation screen.

6. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S4 specifically includes: Insert the jaws of the pliers into the opening of the guide wheel, aim at the welding slag particles on the nozzle to clean them, and then feed the welding wire by pressing the wire feed button on the guide wheel, so that the welding wire and the slag particles are fed out together. Use the jaws of the pliers to cut the welding wire.

7. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S5 specifically includes: The open-end wrench is inserted into the opening of the guide wheel from the DS side, and locks the dimensional machining position on the transition guide tube; The T-shaped socket wrench is inserted into the opening of the guide wheel from the WS side, and the head of the nozzle is tightened. The nozzle is then loosened by rotating it counterclockwise until the nozzle is completely detached from the transition guide.

8. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S7 specifically includes: The open-end wrench is inserted into the opening of the guide wheel from the DS side, and locks the dimensional machining position on the transition guide tube; Place the new nozzle on the socket of the T-type socket wrench, insert the T-type socket wrench into the opening of the guide wheel from the WS side of the guide wheel, align the nozzle with the transition guide and rotate the nozzle clockwise until the nozzle is securely fastened to the transition guide.

9. The method for rapid treatment and restoration of use of laser wire filler welding nozzle clogging according to claim 1, characterized in that, Step S8 specifically includes: The nozzle is retracted by clicking on the welding machine operation screen.

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