A strip butt welding auxiliary device based on laser welding

Abstract

This application discloses an auxiliary device for butt welding of strip steel based on laser welding, relating to the field of welding auxiliary equipment technology. It assists the welding operation by setting a blowing component on the clamps and / or the shifting frame carrying the laser welding machine in the existing strip steel butt welding auxiliary device; it ensures welding quality by blowing away dust and debris near the weld; and it achieves the technical effect of effectively removing debris at the weld position, reducing the probability of welding defects, and ensuring welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding auxiliary equipment technology, and in particular to an auxiliary device for butt welding of strip steel based on laser welding. Background Technology

[0002] In the strip steel rolling process, the butt welding of new and old strip steel is one of the most important steps. In existing technologies, laser welding (using a laser welding machine) is often used at the entrance of the rolling line to achieve the welding combination (butt welding) between the strip steel. Before welding, the positions of the new and old strip steel are first adjusted, and the ends (strip heads) of the new and old strip steel are spliced ​​together on the bottom platform. Then, two clamps positioned on the ground are used to clamp the new and old strip steel respectively to fix the strip steel. Finally, the welding machine is used to weld the new and old strip steel together. When the laser welding machine is working, it uses a high-energy laser beam to melt the material to achieve precision welding, which has the advantages of high efficiency and non-contact welding.

[0003] However, the raw materials for rolling contain impurities such as iron powder (iron oxide powder), dust, and silicon powder. When welding with a welding machine, the quality of the weld is affected by the impurities accumulated near the weld, which can lead to defects such as porosity, slag inclusion, and incomplete penetration. Once these defects are discovered, the beginning and end need to be cut off and re-welded, which is a cumbersome process. If these defects are not discovered, the weld will break, which is difficult to handle and will directly affect the rolling production rhythm and output.

[0004] Therefore, there is a need for a laser welding-based auxiliary device for butt welding of strip steel that can effectively remove debris from the weld seam, reduce the probability of welding defects, and ensure welding quality. Summary of the Invention

[0005] This application provides a laser-based strip butt welding auxiliary device, which solves the technical problems in the prior art where welding defects are easily caused by debris at the weld position when combining new and old strips using laser welding, and the subsequent handling of defects is not only cumbersome and difficult. The laser-based strip butt welding auxiliary device can effectively remove debris at the weld position, reduce the probability of welding defects, and ensure welding quality.

[0006] This application provides an auxiliary device for butt welding of strip steel based on laser welding, including a base platform, two clamps located on both sides of the base platform, a laser welding machine, and a shifting frame for supporting and positioning the laser welding machine; the laser welding machine is moved close to the welding position under the drive of the shifting frame to perform welding operations;

[0007] It also includes a purging assembly;

[0008] The purging assembly is positioned on the clamp and / or the shifting frame, with its length direction being the same as the width direction of the strip, and includes a vent pipe and a row of jet pipes positioned on the outer wall of the vent pipe.

[0009] The jet pipe is a rigid tube with its axis perpendicular to the axis of the vent pipe and connected to the internal space of the vent pipe. There are multiple jet pipes arranged in a row on the vent pipe, facing the joint between the new and old strip steel.

[0010] The jet pipe is connected to an air pump or compressed air pipeline, and sprays air outward in a controlled manner to sweep the joint between the old and new strip steel, removing debris near the joint between the old and new strip steel.

[0011] Furthermore, the displacement frame includes an upright frame, a horizontal frame, and end frames;

[0012] The support frame is a vertically installed rigid frame with its bottom positioned on the ground;

[0013] The horizontal frame is a horizontally arranged rod-shaped frame with its length direction being the same as the width direction of the strip steel. It is slidably positioned on the upright frame along its own length direction and slides in a controlled manner.

[0014] The end frame is a rigid frame that is fixed to one end of the horizontal frame near the strip steel and serves to support the laser welding machine.

[0015] The laser welding machine can move up and down relative to the ground.

[0016] Preferably, it also includes a cleaning component;

[0017] One end of the horizontal frame is fixed with an end carrier;

[0018] The end frame is fixed to the horizontal frame by rigid rods and / or plates;

[0019] The gap between the end frame and the end carrier frame;

[0020] The laser welding machine is slidably positioned on the end frame; the upright frame also has a lifting function.

[0021] The cleaning assembly includes an expansion and contraction belt arrangement assembly, a gas pumping assembly for pumping gas, and an adhesive removal assembly.

[0022] The expansion and contraction belt arrangement assembly is used to arrange a belt that can be deformed into a tubular shape as needed at the bottom of the horizontal frame, thereby assisting in the removal of debris.

[0023] The main body of the adhesive removal component is a combination of a roll, a rigid support, a tape with adhesive on one side, and a guide component. The whole is in the shape of a roll. The tape with adhesive on one side is arranged at the bottom of the expansion and contraction tape under the guidance of the guide component, with the adhesive side facing down.

[0024] Preferably, the expansion and contraction belt arrangement assembly includes a take-up and untake-down drum, a belt head carrier, and an expansion and contraction belt;

[0025] The take-up and unwinding drum is a horizontally placed cylindrical drum, which is positioned on the side wall of the upright frame near the bottom of the horizontal frame by a rigid frame and rotates in a controlled manner.

[0026] The head carrier is fixed to the bottom of the horizontal frame and is positioned near the end carrier frame;

[0027] The expansion and contraction belt is a strip-shaped tube, with one end fixed to the belt head carrier and the other end wound and positioned on the take-up and unwinding drum, close to the bottom surface of the horizontal frame and always in a taut state; the internal space of the expansion and contraction belt is connected to the air pump assembly and expands and contracts in a controlled manner.

[0028] When the horizontal frame moves relative to the vertical frame, the winding drum rotates in a timely manner to maintain the tautness of the expansion belt.

[0029] Preferably, the adhesive removal assembly includes a first roll, a first carrier, a guide wheel, a second roll, a second carrier, and an adhesive removal tape; the adhesive removal tape is a tape with adhesive on one side;

[0030] The first drum is positioned on the side wall of the upright near the bottom of the horizontal frame by the first carrier frame, close to the winding and unwinding drum;

[0031] The second drum is positioned on top of the end carrier via the second carrier frame;

[0032] The guide wheel is positioned on the upright and near the end of the end frame via a rigid frame, and serves to guide the movement direction of the adhesive removal belt.

[0033] The two ends of the adhesive removal tape are respectively wound and positioned on the first and second rolls, passing through the gap between the end carrier and the end frame, and are always taut and always in close contact with the bottom of the expansion and contraction tape.

[0034] As the horizontal frame moves, the first and second drums rotate in a timely manner to maintain the tautness of the adhesive tape and to periodically replace the exposed adhesive tape.

[0035] Preferably, the base platform includes a top plate and a support body;

[0036] The top plate is a horizontally placed rigid plate, fixed to the top of the support body;

[0037] The support structure is a telescopic rod structure, which is set vertically;

[0038] The top of the top plate is provided with a mounting groove; the mounting groove is a straight groove whose length direction is the same as the width direction of the strip.

[0039] A lifting bar is positioned inside the placement slot;

[0040] The lifting bar is moved up and down in a controlled manner, and under normal conditions, its top surface is lower than or flush with the top surface of the top plate.

[0041] Preferably, the support frame includes a base frame and a rotating frame;

[0042] The base frame is a telescopic rod structure that can extend and retract in a controlled manner; the rotating frame is rotatably connected to the top of the base frame about an axis parallel to the ground, and can rotate in a controlled manner and at least 30 degrees; the horizontal frame is slidably positioned on the rotating frame;

[0043] After welding the joint of the strip from the top, control the bottom platform to move down and flip the transverse frame, and clean and weld the joint from the bottom of the strip.

[0044] Preferably, it also includes a polishing belt;

[0045] The end-mounted frame is slidably positioned on the transverse frame along the width direction of the transverse frame and slides in a controlled manner;

[0046] The first carrier is slidably positioned on the upright along the width of the horizontal frame and slides in a controlled manner;

[0047] The guide wheel near the take-up and undo drum is positioned on the first carrier;

[0048] The polishing belt is a sandpaper belt with the rough side facing down. It is laid out in the same way as the adhesive removal belt, and is arranged side by side with the adhesive removal belt. Its two ends are respectively wound and positioned on the first roll and the second roll.

[0049] The widths of both the grinding belt and the adhesive removal belt are greater than the width of the belt head carrier.

[0050] Preferably, the expansion and contraction band is composed of multiple parallel strip tubes, each of which is independently connected to the air pump assembly and can expand and contract independently in a controlled manner; during the cleaning of the steel strip joint, the expansion and contraction band can be controlled to expand and contract locally as needed.

[0051] Preferably, the lifting bar has a row of electromagnets built in; the expansion band has a soft strip of ferromagnetic material built in or covered with it; during the removal of adhesive and grinding cleaning, the magnitude and presence of the magnetic force of the electromagnets can be controlled to focus on cleaning local areas of the strip.

[0052] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0053] By installing a blowing component on the clamps and / or the shifting frame carrying the laser welding machine in the existing strip butt welding auxiliary device, the welding operation is assisted; by blowing away dust and debris near the weld, the welding quality is ensured; this effectively solves the technical problem in the existing technology that when using laser welding to combine new and old strips, welding defects are easily caused by the influence of debris at the weld position, and the post-defect handling process is not only cumbersome and complex but also difficult; thus, the strip butt welding auxiliary device based on laser welding can effectively remove debris at the weld position, reduce the probability of welding defects, and ensure welding quality. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the laser welding-based strip butt welding auxiliary device of this application;

[0055] Figure 2 This is a schematic diagram showing the positional relationship of the components of the auxiliary device for butt welding of strip steel based on laser welding in this application;

[0056] Figure 3 This is a schematic diagram showing the positional relationship between the shifting frame, the base platform, and the strip steel.

[0057] Figure 4 A diagram showing the positional relationship between the cleaning components and the shifting frame;

[0058] Figure 5 A schematic diagram showing the positional relationship of the components in the cleaning assembly;

[0059] Figure 6 A structural diagram of the cleaning component;

[0060] Figure 7 This is a schematic diagram of the expansion process of the expansion band.

[0061] Figure 8 This is a schematic diagram showing the positional relationship between the base frame, rotating frame, horizontal frame, bottom loading platform, and strip steel.

[0062] Figure 9 This is a schematic diagram of the base platform structure;

[0063] Figure 10 This is a schematic diagram of the deformation state of the base platform;

[0064] Figure 11 This is a schematic diagram showing the positional relationship between the adhesive removal belt, the grinding belt, and the shifting frame;

[0065] Figure 12 This is a schematic diagram showing the layout relationship between the adhesive removal belt and the grinding belt on the transfer frame.

[0066] Figure 13 A schematic diagram showing the positional relationship between the adhesive removal belt, the grinding belt, and the expansion belt assembly;

[0067] Figure 14 This is a schematic diagram of the adhesive removal belt and the grinding belt.

[0068] Figure 15 This is a simplified structural diagram of the expansion and contraction zone;

[0069] Figure 16 This is a simplified structural diagram of the lifting bar.

[0070] In the picture:

[0071] Strip steel 001, clamp 100, vent pipe 111, jet pipe 112, base platform 200, top plate 210, mounting slot 211, lifting bar 212, support body 220, laser welding machine 300, upright frame 410, base frame 411, rotating frame 412, horizontal frame 420, end frame 421, end frame 430, winding and unwinding drum 511, head carrier 512, expansion and contraction belt 513, air pump assembly 520, first drum 531, first carrier 532, guide wheel 533, second drum 534, second carrier 535, adhesive removal belt 536, grinding belt 541. Detailed Implementation

[0072] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0073] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0075] Example 1

[0076] like Figure 1 and Figure 2 As shown, the strip butt welding auxiliary device based on laser welding of this application includes clamps 100, a blowing assembly, a base platform 200, a laser welding machine 300, a shifting frame for supporting and positioning the laser welding machine 300, a power assembly, and a control unit.

[0077] The clamps 100 are positioned on the ground, and there are two of them, located on both sides of the base platform 200, respectively, and are used to clamp and fix the new and old strip steel as needed;

[0078] The base platform 200 is a rigid platform with a flat top surface, positioned on the ground, which supports the strip steel 001 and provides placement space for splicing new and old strip steel.

[0079] The laser welding machine 300 is a welding device based on the principle of laser welding;

[0080] The shifting frame is a rigid frame positioned on the ground, located near the base platform 200, and serves to support and fix the laser welding machine 300; the laser welding machine 300 is positioned on the shifting frame and, driven by the shifting frame, moves close to the position to be welded to perform welding operations;

[0081] The power unit is used to provide power for the operation of each component of the auxiliary device for butt welding of strip steel based on laser welding in this application;

[0082] The control unit plays a role in coordinating the operation of various components of the laser-based strip butt welding auxiliary device.

[0083] The clamp 100, the base platform 200, the laser welding machine 300, the shifting frame, the power assembly, and the control unit are all existing technologies.

[0084] Furthermore, the shifting frame includes an upright frame 410, a horizontal frame 420, and an end frame 430; the upright frame 410 is a vertically arranged rigid frame with its bottom positioned on the ground; the horizontal frame 420 is a horizontally arranged rod-shaped frame with its length direction the same as the width direction of the strip 001, and is slidably positioned on the upright frame 410 along its own length direction, sliding under the coordinated control of the power component and the control unit; the end frame 430 is a rigid frame, fixed to the end of the horizontal frame 420 near the strip 001, serving to support the laser welding machine 300; the laser welding machine 300 can move up and down relative to the ground; the laser welding machine 300 is slidably positioned on the end frame 430 in a controlled vertical direction and / or the upright frame 410 is a telescopic rod structure.

[0085] The purging assembly is positioned on the clamp 100 and / or the transverse frame 420, with its length direction being the same as that of the transverse frame 420. The purging assembly includes a vent pipe 111 and a row of jet pipes 112 positioned on the outer wall of the vent pipe 111. The main body of the vent pipe 111 is a rigid tube, serving as a gas passage. The jet pipes 112 are rigid tubes, with their axial direction perpendicular to the axial direction of the vent pipe 111, communicating with the internal space of the vent pipe 111. There are multiple jet pipes 112 arranged in a row on the vent pipe 111, facing the joint between the new and old strip steel. The jet pipes 112 are connected to an air pump or compressed air pipeline, and are controlled to spray air outwards at appropriate times to purge the joint between the new and old strip steel, removing debris near the joint, effectively ensuring welding quality, improving the unit's production capacity, and reducing the accident rate.

[0086] When using the laser welding-based strip butt welding auxiliary device of this application embodiment: after joining the ends of two strips 001 (new and old strips) together on the top of the base platform 200, the strips 001 are fixed by clamps 100; then, the blowing assembly is used to remove debris near the joint of the new and old strips; then, the laser welding machine 300 is carried by the shifting frame to weld the joint of the strips 001 (during welding, process parameters such as welding power and speed are set as needed); the method of removing debris with the blowing assembly before welding can significantly reduce the probability of welding defects such as incomplete weld, root shrinkage, undercut, porosity, slag inclusion, and cracks; the re-welding rate of the weld can be reduced from the original 10% to the current 4%, greatly improving the production rhythm and shift output.

[0087] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0088] This invention solves the technical problems in existing technologies where welding defects are easily caused by debris at the weld seam when combining new and old strip steel using laser welding, and the subsequent handling of these defects is not only cumbersome and complex but also difficult. It achieves the technical effect of a laser welding-based strip steel butt welding auxiliary device that can effectively remove debris at the weld seam, reduce the probability of welding defects, and ensure welding quality.

[0089] Example 2

[0090] To further improve the welding effect and reduce the probability of welding defects, this application embodiment optimizes and improves the structure of the shifting frame based on the above embodiment, and adds a cleaning component to more thoroughly remove debris near the 001 joint of the strip steel through adhesive removal. Specifically:

[0091] like Figures 3 to 7 As shown, an end carrier 421 is fixed to one end of the transverse frame 420 near the strip 001;

[0092] The end-mounted frame 421 is a rigid frame or block, positioned at the end of the transverse frame 420;

[0093] The end frame 430 is fixed to the horizontal frame 420 by a rigid rod and / or plate, and the end frame 430 is located near the end of the horizontal frame 420; there is a gap of at least 0.5 cm between the end frame 430 and the end carrier 421.

[0094] The laser welding machine 300 is slidably positioned on the end frame 430; the upright frame 410 also has a lifting function.

[0095] The cleaning assembly includes an expansion and contraction belt arrangement assembly, an air pump assembly 520, and an adhesive removal assembly.

[0096] The expansion and contraction belt arrangement assembly is used to arrange a belt that can be deformed into a tubular shape as needed at the bottom of the horizontal frame 420, thereby assisting in the removal of debris.

[0097] The expansion and contraction belt arrangement assembly includes a take-up and untake-down drum 511, a belt carrier 512, and an expansion and contraction belt 513;

[0098] The take-up and release drum 511 is a horizontally placed cylindrical drum with a built-in motor. It is positioned on the side wall of the upright frame 410 near the bottom of the horizontal frame 420 by a rigid frame and is controlled to rotate around its own axis to take up or release the expansion and contraction belt 513.

[0099] The head carrier 512 is a horizontally placed rigid rod with its length direction in the same direction as the width direction of the horizontal frame 420. It is fixed to the bottom of the horizontal frame 420 and is located near the end carrier 421.

[0100] like Figure 7 As shown, the expansion and contraction band 513 is a strip-shaped tube made of plastic. When the internal fluid medium is small, it is strip-shaped, and when the internal fluid medium is large, it is tubular. One end is fixed on the band head carrier 512, and the other end is wound and positioned on the take-up and unwinding drum 511, close to the bottom surface of the horizontal frame 420 and always in a taut state. The internal space of the expansion and contraction band 513 is connected to the air pump assembly 520 and expands and contracts in a controlled manner. When the horizontal frame 420 moves relative to the vertical frame 410, the take-up and unwinding drum 511 rotates in a timely manner to maintain the taut state of the expansion and contraction band 513.

[0101] The air pump assembly 520 is a combination of an air pump, an air valve, and an air delivery pipe, positioned on the shifting frame and operated under controlled conditions.

[0102] The main body of the adhesive removal component is a combination of a roll, a rigid support, a tape with adhesive on one side, and a guide component. The whole is in the shape of a roll. The tape with adhesive on one side is arranged at the bottom of the expansion and contraction tape 513 under the guidance of the guide component, with the adhesive side facing down.

[0103] Furthermore, the adhesive removal assembly includes a first roll 531, a first carrier 532, a guide wheel 533, a second roll 534, a second carrier 535, and an adhesive removal tape 536; the adhesive removal tape 536 is a tape with adhesive on one side, and the guide wheel 533 is the aforementioned guiding component.

[0104] The first drum 531 and the second drum 534 are both horizontally placed electric drums that are controlled to rotate around their own axis; the first carrier 532 and the second carrier 535 are both rigid supports.

[0105] The first drum 531 is positioned on the side wall of the upright 410 near the bottom of the horizontal frame 420 by the first carrier 532, and is set close to the take-up and unwind drum 511, and rotates in a controlled manner around its own axis.

[0106] The second drum 534 is positioned on top of the end carrier 421 by the second carrier 535 and rotates in a controlled manner around its own axis;

[0107] The guide wheels 533 are at least three in number, all of which are horizontally placed cylindrical wheels. They are positioned on the upright frame 410 and the end of the end carrier 421 near the end frame 430 by a rigid frame, and serve to guide the movement direction of the adhesive removal belt 536. The presence of the guide wheels 533 ensures that the adhesive removal belt 536 is always in close contact with the bottom of the expansion belt 513. One guide wheel 533 is located near the top of the take-up and unwinding drum 511, and the other two guide wheels 533 are respectively positioned at the top and bottom of the end of the end carrier 421 near the end frame 430.

[0108] The two ends of the adhesive tape 536 are respectively wound and positioned on the first roll 531 and the second roll 534, passing through the gap between the end carrier 421 and the end frame 430, always in a taut state and always in close contact with the bottom of the expansion and contraction tape 513, with one side covered with self-adhesive; as the horizontal frame 420 moves, the first roll 531 and the second roll 534 rotate in a timely manner to maintain the taut state of the adhesive tape 536 and periodically replace the exposed adhesive tape 536.

[0109] When the laser welding-based strip butt welding auxiliary device of this application is used:

[0110] Considering that after air cleaning of the joint of strip 001, some debris may remain or move to the joint, which will still have a certain negative impact on the welding quality;

[0111] Therefore, after air blowing cleaning, the horizontal frame 420 is controlled to move directly above the joint of strip 001. During the movement, the expansion and contraction belt arrangement component and the adhesive removal component are controlled to work together to expose the expansion and contraction belt 513 and the adhesive removal belt 536.

[0112] Then, the shape of the expansion band 513 is adjusted by inflating it with air (by controlling the amount of air, it can be inflated to different degrees).

[0113] Then, control the laser welding machine 300 to move upward, control the horizontal frame 420 to move downward and then upward, and use the adhesive removal component to remove and clean the debris at the joint of strip steel 001.

[0114] Preferably, the end carrier 421 is fixed on the horizontal frame 420 or integrally formed with the horizontal frame 420.

[0115] Furthermore, the air pumping assembly 520 is positioned at the end of the transverse frame 420 away from the strip 001; the expansion and contraction belt 513 is connected to the air pumping assembly 520 through the belt head carrier 512 and the gas channel inside the transverse frame 420.

[0116] Preferably, the adhesive tape 536 is a plastic tape or paper tape with a width greater than 3 cm.

[0117] Preferably, the material of the expansion and contraction band 513 is rubber.

[0118] Preferably, the expansion band 513 is covered with a sleeve to reduce wear on the expansion band 513, and the sleeve is preferably made of plastic.

[0119] Preferably, before welding, the new and old strip steels are not spliced ​​together. Instead, a gap of more than 1 cm is left between the ends of the two strips. After that, the strip steels are blown and cleaned and the adhesive is removed. Then the strip steels 001 are spliced ​​and welded together.

[0120] Example 3

[0121] Considering the above embodiments, direct adhesive removal makes it difficult to clean debris deep into the seams, while cleaning before splicing is cumbersome and difficult to adjust; in order to further improve the adhesive removal and cleaning effect, this application embodiment optimizes and improves the structure of the base platform 200 based on the above embodiments, specifically as follows:

[0122] like Figures 8 to 10 As shown, the base platform 200 includes a top plate 210 and a support body 220;

[0123] The top plate 210 is a horizontally placed rigid plate, fixed to the top of the support 220;

[0124] The support 220 is a telescopic rod structure, vertically arranged, and can be extended and retracted in a controlled manner to drive the top plate 210 to rise and fall;

[0125] The top of the top plate 210 is provided with a mounting groove 211; the mounting groove 211 is a straight groove whose length direction is the same as the width direction of the strip 001.

[0126] A lifting bar 212 is positioned inside the mounting groove 211; the lifting bar 212 is a metal or non-metal strip, and a lifting component is provided between it and the bottom of the mounting groove 211. The lifting component is preferably a strip-shaped airbag or an electric actuator that expands and contracts in a controlled manner, used to drive the lifting bar 212 to move up and down; under normal conditions, the top surface of the lifting bar 212 is lower than the top surface of the top plate 210 or flush with the top surface of the top plate 210.

[0127] After splicing the new and old strip steel together, the joint of strip steel 001 is positioned directly above the lifting bar 212. The lifting bar 212 is controlled to rise and contact the strip steel 001, causing the two strip steel 001s near the joint to be squeezed and deformed, thereby widening the joint. Afterward, the joint of strip steel 001 is cleaned by blowing air and removing any adhesive residue. Finally, the lifting bar 212 is reset and the joint is welded.

[0128] Preferred, such as Figure 11 As shown, the upright frame 410 includes a base frame 411 and a rotating frame 412; the base frame 411 is a telescopic rod structure that can be extended and retracted in a controlled manner; the rotating frame 412 is rotatably connected to the top of the base frame 411 about an axis parallel to the ground, and can rotate in a controlled manner and can rotate at least 180 degrees; the horizontal frame 420 is slidably positioned on the rotating frame 412; after welding the joint of the strip 001 from the top, the bottom platform 200 is controlled to move down and the horizontal frame 420 is flipped, and the joint position of the strip 001 is also cleaned and welded from the bottom.

[0129] Example 4

[0130] Considering that burrs and protrusions at the head of the 001 strip are also important factors affecting the welding effect, in order to further improve the welding quality, this application embodiment adds a grinding belt 541 based on the above embodiment, and optimizes and improves the structure of the end carrier 421 and the first carrier 532, specifically as follows:

[0131] like Figures 12 to 14 As shown, the end carrier 421 is slidably positioned on the transverse frame 420 along the width direction of the transverse frame 420, and slides under the cooperative control of the power assembly and the control unit;

[0132] The first carrier 532 is slidably positioned on the upright 410 along the width direction of the transverse frame 420, and slides under the coordinated control of the power component and the control unit;

[0133] The guide wheel 533, which is close to the take-up and untake-down drum 511, is positioned on the first carrier 532;

[0134] The polishing belt 541 is a sandpaper belt with the rough side facing down. It is arranged in the same way as the adhesive removal belt 536, and is arranged side by side with the adhesive removal belt 536. Its two ends are respectively wound and positioned on the first roll 531 and the second roll 534.

[0135] The widths of both the grinding belt 541 and the adhesive removal belt 536 are greater than the width of the belt carrier 512;

[0136] Before purging and removing adhesive residue (which can be after the lifting bar 212 is raised), first control the grinding belt 541 to move directly below the expansion belt 513, and control the expansion belt 513 to expand. Then, by controlling the grinding assembly to move along its own length direction and / or along its own width direction, the head of the strip steel 001 is ground. After that, purging and removing adhesive residue are carried out (before removing adhesive residue, first control the adhesive removal belt 536 to move directly below the expansion belt 513).

[0137] Preferably, in order to improve the utilization rate of the adhesive removal belt 536 and the grinding belt 541; such as Figure 15 As shown, the expansion and contraction band 513 is composed of multiple parallel strip tubes, each of which is independently connected to the air pump assembly 520 and can expand and contract independently in a controlled manner; during the cleaning of the strip steel 001 joint, the expansion and contraction band 513 can be controlled to expand and contract locally as needed.

[0138] Preferred, such as Figure 16 As shown, the lifting bar 212 has a row of electromagnets controlled by the control unit; the expansion band 513 has a soft band of ferromagnetic material inside or outside; during the removal of adhesive and grinding cleaning, the magnitude and presence of the magnetic force of the electromagnets can be controlled to focus on cleaning local positions (such as corner positions) of the strip steel 001.

[0139] Preferably, before the strip 001 is connected, the top surface of the bottom platform 200 can be cleaned using a cleaning component.

[0140] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A laser welding-based strip butt welding auxiliary device, comprising a base platform (200), two clamps (100) located on both sides of the base platform (200), a laser welding machine (300), and a shifting frame for supporting and positioning the laser welding machine (300); the laser welding machine (300) is moved close to the welding position under the drive of the shifting frame to perform welding operations; characterized in that It also includes a purging assembly; The purging assembly is positioned on the clamp (100) and / or the shifting frame, with its length direction being the same as the width direction of the strip (001), and includes a vent pipe (111) and a row of jet pipes (112) positioned on the outer wall of the vent pipe (111). The jet pipe (112) is a rigid pipe body, with its axis perpendicular to the axis of the vent pipe (111), and it communicates with the internal space of the vent pipe (111). There are multiple jet pipes arranged in a row on the vent pipe (111), facing the joint between the old and new strip steel. The jet pipe (112) is connected to an air pump or compressed air pipeline, and sprays air outward in a controlled manner to sweep the joint between the new and old strip steel, and removes debris near the joint between the new and old strip steel. The shifting frame includes an upright frame (410), a horizontal frame (420), and an end frame (430); The upright frame (410) is a vertically installed rigid frame with its bottom positioned on the ground; The horizontal frame (420) is a horizontally arranged rod-shaped frame with its length direction being the same as the width direction of the strip steel (001). It is slidably positioned on the upright frame (410) along its own length direction and slides in a controlled manner. The end frame (430) is a rigid frame, fixed to one end of the horizontal frame (420) near the strip steel (001), and serves to support the laser welding machine (300). The laser welding machine (300) can move up and down relative to the ground; It also includes cleanup components; The cleaning assembly includes an expansion and contraction belt arrangement assembly, a gas pumping assembly (520) for pumping gas, and an adhesive removal assembly. The expansion and contraction belt arrangement assembly is used to arrange a belt that can be deformed into a tubular shape as needed at the bottom of the horizontal frame (420) to assist in the removal of debris. The main body of the adhesive removal component is a combination of a roll, a rigid support, a tape with adhesive on one side and a guide component. The whole is in the shape of a roll. The tape with adhesive on one side is arranged at the bottom of the expansion tape (513) under the guidance of the guide component, with the adhesive side facing down. The expansion and contraction belt arrangement assembly includes a take-up and release drum (511), a belt carrier (512), and an expansion and contraction belt (513); The take-up and untake-down drum (511) is a horizontally placed cylindrical drum, which is positioned on the side wall of the upright frame (410) near the bottom of the horizontal frame (420) by a rigid frame and is rotated in a controlled manner. The head carrier (512) is fixed to the bottom of the horizontal frame (420) and is positioned near the end carrier (421); The expansion and contraction band (513) is a strip-shaped tube, with one end fixed to the head carrier (512) and the other end wound and positioned on the take-up and unwinding drum (511), close to the bottom surface of the horizontal frame (420) and always in a taut state; the internal space of the expansion and contraction band (513) is connected to the air pump assembly (520) and expands and contracts in a controlled manner; When the horizontal frame (420) moves relative to the vertical frame (410), the winding drum (511) rotates in a timely manner to maintain the taut state of the expansion belt (513).

2. The auxiliary device for butt welding of strip steel based on laser welding as described in claim 1, characterized in that: One end of the horizontal frame (420) is fixed with an end carrier (421); The end frame (430) is fixed to the horizontal frame (420) by rigid rods and / or plates; There is a gap of at least 0.5 cm between the end frame (430) and the end carrier (421); The laser welding machine (300) is slidably positioned on the end frame (430); the upright frame (410) also has a lifting function.

3. The laser welding based butt welding of strip steel auxiliary device of claim 1, wherein: The adhesive removal assembly includes a first spool (531), a first carrier (532), a guide wheel (533), a second spool (534), a second carrier (535), and an adhesive removal tape (536); the adhesive removal tape (536) is a tape with adhesive on one side; The first drum (531) is positioned on the side wall of the upright (410) near the bottom of the horizontal frame (420) by the first carrier (532), and is set near the take-up and unwinding drum (511); The second drum (534) is positioned on top of the end carrier (421) via the second carrier (535); The guide wheel (533) is positioned on the upright (410) and the end of the end frame (421) near the end frame (430) by the rigid frame, and plays the role of guiding the movement direction of the adhesive strip (536); The two ends of the adhesive removal tape (536) are respectively wound and positioned on the first roll (531) and the second roll (534), passing through the gap between the end carrier (421) and the end frame (430), and are always taut and always close to the bottom of the expansion tape (513); As the horizontal frame (420) moves, the first drum (531) and the second drum (534) rotate in a timely manner to maintain the tautness of the adhesive tape (536) and to periodically replace the exposed adhesive tape (536).

4. The laser welding based strip butt welding aid as claimed in claim 2, wherein: The base platform (200) includes a top plate (210) and a support (220); The top plate (210) is a horizontally placed rigid plate, fixed to the top of the support (220); The support (220) is a telescopic rod structure and is set vertically; The top plate (210) has a mounting groove (211) on its top; the mounting groove (211) is a straight groove whose length direction is the same as the width direction of the strip (001); A lifting bar (212) is positioned inside the mounting groove (211); The lifting bar (212) moves in a controlled manner, and under normal conditions, its top surface is lower than or flush with the top surface of the top plate (210).

5. The laser welding based strip butt welding auxiliary device of claim 4, wherein: The upright frame (410) includes a base frame (411) and a rotating frame (412); The base frame (411) is a telescopic rod structure that can be extended and retracted in a controlled manner; the rotating frame (412) is rotatably connected to the top of the base frame (411) around an axis parallel to the ground, and can rotate in a controlled manner and at least 180 degrees; the horizontal frame (420) is slidably positioned on the rotating frame (412); After welding the joint of the strip (001) from the top, control the bottom platform (200) to move down and flip the transverse frame (420), and clean and weld the joint position from the bottom of the strip (001).

6. Laser welding based strip butt welding aid as claimed in any of the claims 2 to 5, characterized in that: It also includes a polishing belt (541); The end-mounted frame (421) is slidably positioned on the transverse frame (420) along the width direction of the transverse frame (420) and slides in a controlled manner; The first carrier (532) is slidably positioned on the upright (410) along the width direction of the transverse frame (420) and slides in a controlled manner; The guide wheel (533) near the take-up / untake-off drum (511) is positioned on the first carrier (532); The polishing belt (541) is a sandpaper belt with the rough side facing down. It is arranged in the same way as the adhesive removal belt (536) and is set up side by side with the adhesive removal belt (536). Its two ends are respectively wound and positioned on the first roll (531) and the second roll (534). The widths of both the grinding belt (541) and the adhesive removal belt (536) are greater than the width of the belt carrier (512).

7. The laser welding based strip butt welding auxiliary device of claim 6, wherein: The expansion and contraction band (513) is composed of multiple parallel strip tubes. Each strip tube is independently connected to the air pump assembly (520) and can expand and contract independently in a controlled manner. During the cleaning of the strip steel (001) joint, the expansion and contraction band (513) can be controlled to expand and contract locally as needed.

8. The laser welding based strip butt welding aid as claimed in claim 6, characterized in that: The lifting bar (212) has a row of electromagnets built in; the expansion band (513) has a soft band of ferromagnetic material built in or covered with it; during the removal and grinding cleaning, the magnitude and presence of the magnetic force of the electromagnets can be controlled to focus on cleaning local areas of the strip (001).

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