A laser welding platform common to flat and cylindrical workpieces and method of use

Abstract

This invention belongs to the technical field of material manufacturing welding devices, and relates to a laser welding platform for both flat plates and cylinders, and its usage method. The frame includes a conveying device with a flat plate welding magnetic platform at the front and a cylinder welding magnetic platform at the rear. These platforms are used to attract the flat plate. Below the cylinder welding magnetic platform is a cylinder welding lifting platform for splicing the welded flat plates end-to-end into a cylindrical shape. A laser head moving device slides on the top of the frame, with a focus lifting device sliding on one side and a laser head on the other. The laser head, laser display, and laser are electrically connected. This invention achieves integrated welding from flat plate to cylinder. The welding platform does not need to be changed from flat plate to cylinder, avoiding damage caused by handling the flat plate and manual rolling, thus improving efficiency. The cylinder welding lifting platform design enables tight splicing of the cylinder end-to-end, solving the problem of large weld seams in existing systems.

Description

Technical Field

[0001] This invention belongs to the technical field of material manufacturing and welding equipment, and particularly relates to a laser welding platform that can be used for both flat plates and cylinders, and its method of use. Background Technology

[0002] In the petrochemical, aerospace, and other machinery manufacturing fields, it is necessary to roll and splice welded flat materials into cylinders, forming a cylindrical structure through end-to-end welding before further use. In traditional welding processes, the welding between flat plates and the rolling welding are separate processes. Furthermore, the rolling and splicing of traditional flat materials requires manual assembly, which can easily damage the reflective film surface due to its strict surface requirements, leading to contamination and other problems, resulting in low work efficiency. Additionally, existing methods for welding flat plates and cylinders to ensure weld strength include: 1. Laser welding on both sides; 2. Laser welding after wire filling. Both methods suffer from excessively large weld seams, large heat-affected zones, resulting in brightness loss at the splicing points and large dark areas that negatively impact reflective performance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a laser welding platform for both flat plates and cylinders and its usage method; to solve the problem of damage and contamination of the reflective film surface caused by rolling flat plates into round shapes in the prior art; and to solve the problem of large weld seams after welding flat plates and cylinders, thereby improving work efficiency.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] In a first aspect, the present invention provides a laser welding platform for both flat plates and cylinders, comprising a frame, a laser, a laser display, and a magnetic switch control box. The frame contains a conveying device, with a flat plate welding magnetic platform at its head and a cylinder welding magnetic platform at its tail. The conveying device is used to transport flat plates. Both the flat plate welding magnetic platform and the cylinder welding magnetic platform are used to attract flat plates. The magnetic switch control box is mounted on the frame and is used to control the opening and closing of the flat plate welding magnetic platform and the cylinder welding magnetic platform, as well as the magnitude of the attraction force. A cylinder welding lifting platform is located below the cylinder welding magnetic platform, used to splice the welded flat plates end-to-end into a cylindrical shape. A laser head moving device is slidably mounted on the top of the frame, perpendicular to the flat plate transport direction. A focus focusing lifting device is slidably mounted on one side of the laser head moving device, driving the laser head to move up and down. The laser head, laser display, and laser are electrically connected.

[0006] The frame is divided into two parts: one part performs the welding of individual flat plates, and the other part performs the rolling and welding of the entire flat plate after welding. The flat plate welding magnetic platform, when opened, can hold the flat plate in place, preventing movement and also serving a leveling function. The cylindrical magnetic welding platform, when opened, serves to hold and level the plate; when closed, it allows for the removal of the welded cylinder. The cylindrical welding magnetic platform's suspended design facilitates easy removal of the welded cylinder. A laser monitor allows for precise determination of the focal point and viewing of the laser spot size, and also enables monitoring of any welding position deviations during the welding process.

[0007] Preferably, the cylindrical welding lifting platform includes N supporting devices and a lifting platform control box, where N≥3; the cylindrical welding lifting platform is electrically connected to the lifting platform control box, which is used to control the lifting platform to rise or fall; the supporting devices include support rods on both sides and a cylinder located between the support rods on both sides; the N supporting devices are arranged in an arc shape. The cylindrical welding lifting platform makes the welded plate tend to be cylindrical. When the cylindrical welding lifting platform rises, it can exert upward pressure, better ensuring that the edges of the first and last plates fit tightly together. This solves the problem of low efficiency caused by manual rolling in existing cylindrical welding processes, avoids damage and contamination to the plate surface, and also solves the problem of large weld seams at the first and last joints in existing welding processes.

[0008] Furthermore, the cylindrical welding lifting platform includes N lifting devices and a lifting platform control box, where N≥9; all N lifting devices are electrically connected to the lifting platform control box, which is used to control the lifting devices to rise or fall; each lifting device includes lifting rods on both sides and a cylinder located between the lifting rods on both sides; the N lifting devices are arranged in an arc shape; the lifting platform control box can control the lifting devices individually, and can control the lifting devices to rise or fall according to the needs of the splicing and welding processes, so as to better achieve a tight fit between the beginning and end of the overall platform, minimize the weld seam, and solve the problem of excessively large weld seams in existing welding processes.

[0009] Preferably, the top of the frame is provided with a laser head moving guide rail, and the bottom of the laser head moving device is slidably connected to the frame via the laser head moving guide rail; the frame is provided with a laser head moving guide rail speed control box for controlling the travel speed of the laser head moving device. The laser head moving device drives the laser head to move between the flat welding platform and the cylindrical welding platform, realizing integrated flat welding and cylindrical welding.

[0010] Preferably, the focus lifting device includes a mounting block A, a motor, a lead screw A, a slider A, and a focus lifting device control box. The mounting block A is slidably connected to the laser head moving device. The output end of the motor is connected to the lead screw A, which is rotatably mounted inside the mounting block A. The slider A is sleeved on the outer wall of the lead screw A, and the side of the slider A away from the laser head moving device is connected to the laser head. The focus lifting device control box is mounted on the frame and is used to control the forward and reverse rotation of the motor, which in turn drives the lead screw A to rotate forward and reverse, causing the slider A to rise or fall. The focus lifting device raises and lowers the focal length, thus achieving focusing and perfect light output.

[0011] Preferably, the frame is provided with fine-tuning devices on both sides. Each fine-tuning device includes a mounting block B, a lead screw B, and a slider B. One side of the mounting block B is located on the side of the frame; the lead screw B is rotatably mounted within the mounting block B; the slider B is sleeved on the outer wall of the lead screw B, and one side of the slider B has a protrusion; the other side of the mounting block B has a locking hole, and the side of the laser head moving device has a guide rail lock that matches the locking hole. Opening the guide rail lock allows the laser head moving device to move freely; locking it prevents movement, thus avoiding misalignment during welding.

[0012] Preferably, the frame has a folding plate on the side near the magnetic welding platform, and the folding plate is hinged to the frame. The folding plate facilitates the placement of a second plate to be welded, and lowering the folding plate makes it easier to align the focus trajectory with the edge of the plate.

[0013] Preferably, the conveying device includes several rubber rollers, the flat plate welding magnetic platform is disposed on one side of the conveying device, and the cylindrical welding magnetic platform is disposed between two rubber rollers at the tail of the transmission device; the cylindrical welding magnetic platform is lower than the flat plate welding magnetic platform. The movement of the flat plate is achieved by the rotation of the rubber rollers, and the multiple rubber rollers ensure smooth translation of the entire welded flat plate.

[0014] Preferably, a film-winding roller is provided on one side of the flat plate welding magnetic platform. To prevent damage or contamination of the flat plate during welding and translation, a film-winding roller is designed. The film is wound onto the film-winding roller, and as the flat plate moves, the film moves with it and adheres to the surface of the flat plate for protection.

[0015] Preferably, the laser is electrically connected to the water-cooling device; the laser is connected to the laser head via an optical fiber; a laser head translation guide rail is provided on one side of the laser head moving device, and the focus lifting device is slidably connected to the laser head moving device via the laser head translation guide rail; a laser head translation control box is provided inside the frame for controlling the translation of the laser head translation guide rail in the weld direction. The water-cooling device serves to cool the laser. The laser needs to be turned on simultaneously during operation, as it generates a large amount of heat. Water that has undergone circulation treatment is needed to cool the laser and prevent it from overheating and stopping operation.

[0016] Secondly, the present invention provides a method for using a laser welding platform that can be used for both flat plates and cylinders, the method being as follows:

[0017] Step S1: Take a piece of welding-specific white paper of appropriate size and place it on the flat welding magnetic platform and the cylindrical welding magnetic platform respectively and fix it; keep the welding platform clean; turn on the platform power and adjust the welding device; measure the thickness of the flat plate to be welded and set the welding parameters in the laser; cover the front of the flat plate with film.

[0018] Step S2: Place the first plate face down and back up on the platform; the edge of the first plate is located in the middle of the plate welding magnetic platform;

[0019] Step S3: Move the laser head to one end of the first plate and observe through the laser display whether the focus is on the edge of the first plate. After adjusting the first plate to a suitable position, move the laser head to the other end of the first plate and readjust the edge position of the first plate again. Repeat this operation multiple times until the focus movement trajectory coincides with the edge of the first plate.

[0020] Step S4: Open the magnetic switch control box, fix the first plate with the flat plate welding magnetic platform, and then close the magnetic switch control box;

[0021] Step S5: Place the second plate face down and back up on the platform; slowly move the second plate closer to the edge of the first plate until the edge of the second plate is in close contact with the edge of the first plate;

[0022] Step S6: Open the magnetic switch control box again and use the flat plate welding magnetic platform to fix the second plate;

[0023] Step S7: By moving the laser head, readjust the focus and focal length, and then proceed with the welding work;

[0024] Step S8: After welding is completed, turn off the magnetic switch control box, and at the same time move the first plate and the second plate after welding so that the edge of the second plate is in the middle position of the plate welding magnetic platform.

[0025] Step S9: Repeat steps S5-S8 for the following operations; and so on to complete the welding of the second plate and the third plate, as well as the welding of the penultimate plate and the last plate.

[0026] Step S10: Move the welded flat plate as a whole into the cylindrical welding magnetic platform; the first flat plate enters the cylindrical welding lifting platform as the conveyor moves, and the edge of the last flat plate is located in the middle of the cylindrical welding magnetic platform.

[0027] Step S11: Move the laser head above the cylindrical welding magnetic platform using the laser head moving device; adjust the focus using the laser display to align the edge of the last plate with the focus trajectory; open the magnetic switch control box; fix the last plate with the cylindrical welding magnetic platform and then close the magnetic switch control box.

[0028] Step S12: Control the cylindrical welding lifting platform to slowly rise, so that the edge of the first plate slowly approaches the edge of the last plate until they are tightly fitted.

[0029] Step S13: Open the magnetic switch control box again and use the cylindrical welding magnetic platform to fix the first plate;

[0030] Step S14: By moving the laser head, readjust the focus and focal length, and then proceed with the welding work;

[0031] Step S15: After welding is completed, turn off the magnetic switch control box; lower the cylindrical welding lifting platform to its lowest position, and then slowly remove the welded cylinder.

[0032] The present invention has the following beneficial effects: (1) The present invention integrates the flat welding platform and the cylindrical welding platform. The laser head moves between the flat welding platform and the cylindrical welding platform through the laser head moving device. There is no need to change the welding platform from the flat plate to the cylinder, saving operating space and avoiding damage when moving the flat plate. The guide rail design eliminates the need for multiple welding heads, thereby saving costs. After each flat plate is welded, the cylindrical welding lifting platform assists the flat plate to automatically roll the beginning and end and complete the welding work, improving work efficiency and avoiding wear on the flat plate surface during manual rolling. An electromagnetic suction platform-assisted method is proposed to ensure that the flat plate surface is not damaged, contaminated, or burned by the laser.

[0033] (2) This invention proposes a non-destructive welding cylindrical platform and designs a cylindrical welding lifting device. The lifting device provides pressure to make the end plates fit together tightly without any steps. This solves the problem of large weld seams in existing welding methods.

[0034] (3) The present invention designs a focal length focusing lifting device to raise and lower the focal length to achieve the focusing function of the laser head and achieve perfect light output; the side of the laser head moving device is provided with a guide rail lock, so that the laser guide rail cannot move during the welding process to avoid the offset during the welding process, which would cause the laser to burn the edge of the plate and the welding failure at the weld position; in order to prevent the offset during the welding process or the need for fine adjustment of the laser head moving device, a fine adjustment device is designed to make the overall welding platform easy to use.

[0035] (4) The present invention designs a film roll roller that naturally achieves synchronization between the flat plate and the film during the flat plate translation process, and achieves a welding method with the front side facing down and the back side facing up, without causing contamination or damage to the front of the flat plate; the rubber roller allows the flat plate to be smoothly translated without scratching the plate surface during the movement. Attached Figure Description

[0036] Figure 1 : A schematic diagram of the structure of the laser welding platform for both flat plates and cylinders of the present invention;

[0037] Figure 2 Schematic diagram of the structure of the laser welding platform for both flat plates and cylinders of the present invention for cylinder welding.

[0038] Figure 3 : Top view of the laser welding platform for both flat plates and cylinders of the present invention;

[0039] Figure 4 Side view of the laser welding platform for both flat plates and cylinders of the present invention performing cylinder welding;

[0040] Figure 5 : A schematic diagram of the focal length focusing lifting device in this invention;

[0041] Figure 6 : A cross-sectional view of the focus lifting device in this invention;

[0042] Figure 7 : Schematic diagram of the fine-tuning device in this invention.

[0043] The components include: 1. Frame; 2. Flat plate welding magnetic platform; 3. Laser head moving device; 4. Laser head moving guide rail; 5. Laser head moving guide rail speed control box; 6. Laser head translation guide rail; 7. Laser head translation control box; 8. Focusing lifting device; 8-1. Mounting block A; 8-2. Motor; 8-3. Lead screw A; 8-4. Slider A; 9. Focusing lifting device control box; 10. Focusing device electrical cabinet; 11. Cylindrical welding magnet. 12. Magnetic suction switch control box; 13. Cylindrical welding lifting platform; 14. Lifting platform control box; 15. Laser head; 16. Laser display; 17. Laser; 18. Water cooling device; 19. Folding plate; 20. Optical fiber; 21. Rubber roller; 22. Guide rail lock; 23. Fine adjustment device; 23-1. Mounting block B; 23-2. Lead screw B; 23-3. Slider B; 23-3-1. Protrusion; 24. Film winding roller. Detailed Implementation

[0044] The present invention will be further described below with reference to embodiments, but these embodiments are not intended to limit the scope of the invention.

[0045] like Figure 1-7 As shown; a laser welding platform for both flat plates and cylinders includes a frame 1; the frame 1 is divided into a flat plate welding platform and a cylinder welding platform. The flat plate welding platform is used for welding between the flat plates, and the cylinder welding platform is used for rolling the ends of the welded flat plates.

[0046] The frame 1 is equipped with a conveying device. The front of the conveying device is equipped with a flat plate welding magnetic platform 2, and the rear of the conveying device is equipped with a cylindrical welding magnetic platform 11. The conveying device is used to transport flat plates. The conveying device includes several rubber rollers 21. The flat plate welding magnetic platform 2 is set on one side of the conveying device, and the cylindrical welding magnetic platform 11 is set between two rubber rollers at the rear of the conveying device. The cylindrical welding magnetic platform 11 is about 10cm lower than the flat plate welding magnetic platform 2. This makes it easier to move the welded flat plate into the cylindrical welding platform and also avoids the edge of the magnetic platform hitting the front of the flat plate, which would damage the flat plate.

[0047] Both the flat welding magnetic platform 2 and the cylindrical welding magnetic platform 11 are used to attract flat plates. When the flat welding magnetic platform 2 is open, it uses a magnetic plate or magnet to attract the flat plate, preventing it from moving. It also serves a leveling function. When closed, the flat plate can be moved smoothly. The cylindrical welding magnetic platform 11, when open, serves both attracting and leveling functions; when closed, the cylinder can be removed. The frame 1 contains a magnetic switch control box 12, used to control the opening and closing of the flat welding magnetic platform 2 and the cylindrical welding magnetic platform 11, as well as the magnitude of the attracting force. The use of magnetic devices for the flat welding magnetic platform and the cylindrical welding magnetic platform in this technical solution is existing technology. It utilizes the magnetic force of a strong magnet to fix the material to be welded onto the platform. Those skilled in the art can choose conventional methods as needed, and no further limitations are made here. This solution uses the MYUNGSUNG magnetic device.

[0048] A laser head moving device 3 is slidably mounted on the top of the frame 1. A focal length focusing lifting device 8 is slidably mounted on one side of the laser head moving device 3. A laser head 15 is mounted on one side of the focal length focusing lifting device 8, which moves the laser head 15 up and down. The laser head 15 determines the focal point and focal length. The quality of the laser head determines the quality of the laser spot. The laser head has a lens, which needs to be cleaned or replaced regularly. The laser head 15, laser display 16, and laser 17 are electrically connected. The laser is used to adjust the parameters of the welding system. The power, time, frequency, and waveform selection can all be controlled. The laser display 16 is located on one side of the frame 1. Through the laser display 16, the focal point position can be accurately determined and the size of the laser spot can be viewed. During the welding process, it is also possible to check whether the weld point position has shifted. The laser 17 is electrically connected to a water cooling device 18. The water cooling device is used to cool the laser. When the laser is working, it needs to be started simultaneously. The laser generates a lot of heat during operation, which needs to be cooled by water that has undergone water circulation treatment to prevent the laser from overheating and stopping. The laser 17 is connected to the laser head 15 through an optical fiber 20.

[0049] The top of the frame 1 is provided with a laser head moving guide rail 4, and the bottom of the laser head moving device 3 is slidably connected to the frame 1 through the laser head moving guide rail 4, so that the laser head moving device 3 drives the laser head 15 to move along the transmission direction of the plate, that is, along the X direction; the frame 1 is provided with a laser head moving guide rail speed control box 5, which is used to control the traveling speed of the laser head moving device 3 and change one of the factors of the plate overlap rate;

[0050] A laser head translation guide rail 6 is provided on one side of the laser head moving device 3. The laser head 15 can move on the laser head translation guide rail 6, that is, move along the Y direction. The mounting block A 8-1 of the focal length focusing lifting device 8 is slidably connected to the laser head moving device 3 through the laser head translation guide rail 6. A laser head translation control box 7 is provided on the frame 1, which is used to control the laser head translation guide rail 6 to translate in the flat plate transmission direction, move the laser head, determine the starting point and the ending point, and turn the light source on and off.

[0051] The focus lifting device 8 includes a mounting block A 8-1, a motor 8-2, a lead screw A 8-3, a slider A 8-4, and a focus lifting device control box 9. The mounting block A 8-1 is slidably connected to the laser head moving device 3. The output end of the motor 8-2 is connected to the lead screw A 8-3, which is rotatably mounted within the mounting block A 8-1. Bearings are provided at both the upper and lower ends of the mounting block A 8-1, and the two ends of the lead screw A 8-3 are rotatably connected to the mounting block A 8-1 via these bearings. The slider A 8-4 is fitted onto the outer wall of the lead screw A 8-3, and the side of the slider A 8-4 away from the laser head moving device 3 is connected to the laser head 15. The focus lifting device control box 9 is mounted on the frame 1 and is used to control the forward and reverse rotation of the motor 8-2, which in turn drives the lead screw A 8-3 to rotate forward and reverse, thus moving the slider A 8-4... The laser head 15 is raised or lowered by 8-4, which allows the laser head 15 to move along the Z direction, raising and lowering the focal length to achieve focusing and thus achieve perfect light output. The frame 1 is equipped with a focusing device cabinet 10, which controls the power supply of the focusing lifting device 8 and can also set the lifting speed and automatic focusing of the focusing lifting device 8.

[0052] Fine-tuning devices 23 are provided on both sides of the frame 1. Both the flat welding platform and the cylindrical welding platform are equipped with fine-tuning devices 23. The fine-tuning device 23 includes a mounting block B 23-1, a lead screw B 23-2, and a slider B 23-3. One side of the mounting block B 23-1 is located on the side of the frame 1. The lead screw B 23-2 is rotatably mounted inside the mounting block B 23-1. Bearings are provided at both ends of the mounting block B 23-1. The two ends of the lead screw B 23-2 are rotatably mounted inside the mounting block B 23-1 through the bearings. The slider B 23-3 is sleeved on the outer wall of the lead screw B 23-1. A protrusion 23-3-1 is provided on one side of the slider B 23-3. A locking hole is provided on the other side of the mounting block B 23-1. A guide rail lock 22 matching the locking hole is provided on the side of the laser head moving device 3. Manually tighten screw 23-2. Screw B 23-2 rotates, causing slider B 23-3 to move within mounting block B 23-1, thereby moving protrusion 23-3-1. When the laser head moving device 3 is in the position of the flat welding platform, it is locked with the lock hole by guide rail lock 22, preventing the laser head moving device 3 from moving and avoiding displacement during welding. If fine adjustment of the weld point position is required, screw B 23-2 can be rotated to move protrusion 23-3-1, providing a pushing force to the laser head moving device 3, thus achieving fine adjustment.

[0053] Below the cylindrical welding magnetic platform 11 is a cylindrical welding lifting platform 13, which is used to splice the welded flat plates end to end into a cylindrical shape.

[0054] The cylindrical welding lifting platform 13 includes N symmetrically arranged support devices and a lifting platform control box 14, where N≥3, and in this embodiment N=9. The cylindrical welding lifting platform 13 is electrically connected to the lifting platform control box 14, which is used to control the raising or lowering of the cylindrical welding lifting platform 13. The support devices include support rods on both sides and a cylinder located between the support rods on both sides. The N support devices are arranged in an arc shape. When the cylindrical welding lifting platform 13 rises, it can exert upward pressure, making the flat plate on the cylindrical welding magnetic platform more flat; when it lowers, it allows the cylindrical cylinder after the ends are welded to return to its natural state.

[0055] A folding plate 19 is provided on the side of the frame 1 near the magnetic welding platform 2. The folding plate 19 is hinged to the frame 1. When the plate to be welded is large, the folding plate 19 can be raised to place the plate to be welded.

[0056] A film-winding roller 24 is provided on one side of the flat plate welding magnetic suction platform 2. A protective film for the surface of the flat plate is wound on the film-winding roller 24 to protect the flat plate.

[0057] In another embodiment, the difference lies in the cylindrical welding lifting platform, which includes N lifting devices and a lifting platform control box, where N≥9; all N lifting devices are electrically connected to the lifting platform control box, which is used to control the lifting devices to rise or fall; each lifting device includes lifting rods on both sides and a cylinder located between the two lifting rods; the N lifting devices are arranged in an arc shape; the lifting platform control box can control the lifting devices individually, and can control the lifting devices to rise or fall according to the needs of the splicing and welding processes, so as to better achieve a tight fit between the beginning and end of the overall platform, minimize the weld seam, and solve the problem of excessively large weld seams in the existing welding process.

[0058] A method for using a laser welding platform that can be used for both flat plates and cylinders, the method being as follows:

[0059] Step S1: Take appropriately sized pieces of welding-specific white paper and lay them on the flat welding magnetic platform 2 and the cylindrical welding magnetic platform 11 respectively. Seal the edges with tape. Laying the white paper can prevent contamination and damage to the flat plates and also allow observation of the laser welding effect of the flat plate weld. If severe marks are left on the white paper, it indicates that the weld effect is poor. Wipe the entire welding area with a lint-free cloth to ensure there is no dust or other impurities and keep the welding platform clean. Turn on the power to the entire platform and adjust the welding device. Measure the thickness of the flat plate to be welded and set the welding parameters in the laser 17. First, pull the film from the film roll 24 to a length of 0.8m-1m and lay it flat on the rubber roller 21.

[0060] Step S2: Place the first plate face down and back up on the platform; note that the front should not be placed on a place without white paper or film to prevent damage to the front; the left edge of the first plate should be located in the middle of the plate welding magnetic platform 2 with the deviation as small as possible, and attach the film to the lower right side of the first plate so that the film and the first plate can move synchronously.

[0061] Step S3: Turn on the laser head translation control box 7 to control the laser head translation guide rail 6, and move the laser head 15 to one end of the weld seam of the first plate. Observe whether the focus is on the edge of the first plate through the laser display 16. After manually adjusting the first plate to a suitable position, move the laser head 15 to the other end of the first plate and readjust the edge position of the first plate again. Repeat the operation until the focus movement trajectory coincides with the edge of the first plate.

[0062] Step S4: Open the magnetic switch control box 12, use a magnetic plate or magnet to fix the first plate to the plate welding magnetic platform, and then close the magnetic switch control box 12.

[0063] Step S5: Fold the flat panel 19 up and lay a layer of film flat. Place the second flat panel face down and back up on the platform. Slowly move the second flat panel closer to the edge of the first flat panel until the edge of the second flat panel is tightly attached to the edge of the first flat panel.

[0064] Step S6: Open the magnetic switch control box 12 again, and use the flat plate welding magnetic platform 2 to fix the second plate;

[0065] Step S7: Turn on the laser head translation control box 7 to control the laser head translation guide rail 6, move the laser head 15, with the left end of the weld as the starting end and the right end as the ending end, readjust the focus and focal length, and then carry out the welding work.

[0066] Step S8: After welding is completed, turn off the magnetic switch control box 12, and at the same time move the first plate and the second plate after welding so that the left edge of the second plate is located in the middle position of the plate welding magnetic platform 2.

[0067] Step S9: Repeat steps S5-S8 for the following operations; and so on to complete the welding of the second plate to the third plate and the second to last plate to the last plate, until the plate welding operation is completed;

[0068] Step S10: Move the welded flat plate as a whole into the cylindrical welding magnetic platform 11; the first flat plate enters the cylindrical welding lifting platform 13 as the conveying device moves, and the edge of the last flat plate is located in the middle of the cylindrical welding magnetic platform 11. The welded flat plate is formed into a cylindrical shape by passing through the cylindrical welding lifting platform.

[0069] Step S11: Open the guide rail lock 22, turn on the laser head moving guide rail speed control box 7 to control the laser head moving guide rail 4 to move, so that the laser head moving device 3 moves to move the laser head 15 above the cylindrical welding magnetic suction platform 11, and then lock the guide rail lock with the lock hole; adjust the focus through the laser display 16, adjust the edge of the last plate to coincide with the focus trajectory, open the magnetic suction switch control box 12, fix the last plate with the cylindrical welding magnetic suction platform 11, and then close the magnetic suction switch control box 12; during the welding process, if there is a slight deviation between the laser head and the weld, the fine adjustment device 23 can be used. By rotating the screw B 23-2, the protrusion 23-3-1 is moved to push the laser head moving device 3, so that the laser head focus is aligned with the weld, and fine adjustment is achieved;

[0070] Step S12: Turn on the lifting platform control box 14 to control the cylindrical welding lifting platform 13 to slowly rise, so that the edge of the first plate slowly approaches the edge of the last plate until they are tightly fitted.

[0071] Step S13: Open the magnetic switch control box 12 again, and use the cylindrical welding magnetic platform 11 to fix the first plate;

[0072] Step S14: Turn on the laser head translation control box 7 to control the laser head translation guide rail 6, move the laser head 15, readjust the focus and focal length, and then carry out the welding work.

[0073] Step S15: After welding is completed, turn off the magnetic switch control box 12; lower the cylindrical welding lifting platform 13 to its lowest position, and then slowly remove the welded cylindrical cylinder.

[0074] Selection of welding parameters:

[0075] 1. First, the thickness and hardness of the plate to be welded must be measured. Thickness is the primary condition, while hardness is the secondary condition. Different types of plates will have different hardnesses, so the parameters need to be adjusted through experiments to complete the welding.

[0076] 2. Taking nickel plates as an example, the parameters used for welding 0.5mm nickel plates are: pulse power 500W, pulse time 1ms, pulse frequency 7, and a rectangular wave waveform; the parameters used for welding 0.6mm nickel plates are: pulse power 500W, pulse time 1.3ms, pulse frequency 7, and a rectangular wave waveform; the parameters used for welding 0.7mm nickel plates are: pulse power 500W, pulse time 1.5ms, pulse frequency 7, and a rectangular wave waveform. The frequency selection here is limited by the platform's own translation speed; as the movement speed increases, the frequency needs to be increased accordingly.

[0077] 3. Pulse power affects the size of the entire welding spot, pulse duration affects the depth of penetration, and pulse frequency affects the overlap rate of the welding spot.

[0078] 4. The optimal spot size is 0.2 mm in diameter, the optimal melting depth is 35% to 45% of the plate thickness, and the optimal spot overlap rate is 60%.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. However, the above description is merely a specific embodiment of the present invention, and the technical features of the present invention are not limited thereto. Any other embodiments derived by those skilled in the art without departing from the technical solution of the present invention should be covered within the patent scope of the present invention.

Claims

1. A laser welding platform that can be used for both flat plates and cylinders, characterized in that, The system includes a frame (1), a laser (17), a laser display (16), and a magnetic switch control box (12). The frame (1) contains a conveying device. The front of the conveying device has a flat welding magnetic platform (2), and the rear of the conveying device has a cylindrical welding magnetic platform (11). The conveying device is used to transport flat plates. Both the flat welding magnetic platform (2) and the cylindrical welding magnetic platform (11) are used to attract flat plates. The magnetic switch control box (12) is installed on the frame (1) and is used to control the opening and closing of the flat welding magnetic platform (2) and the cylindrical welding magnetic platform (11). The size of the adsorption force; a cylindrical welding lifting platform (13) is provided below the cylindrical welding magnetic platform (11), which is used to splice the welded flat plates end to end into a cylindrical shape; a laser head moving device (3) is slidably provided on the top of the frame (1), the laser head moving device (3) is perpendicular to the transmission direction of the flat plate, and a focal length focusing lifting device (8) is slidably provided on one side of the laser head moving device (3), which drives the laser head (15) to move up and down; the laser head (15), laser display (16), and laser (17) are electrically connected. The cylindrical welding lifting platform (13) includes N support devices and a lifting platform control box (14), where N ≥ 3; the cylindrical welding lifting platform (13) is electrically connected to the lifting platform control box (14), and the lifting platform control box (14) is used to control the cylindrical welding lifting platform (13) to rise or fall; the support device includes support rods on both sides and a cylinder located between the support rods on both sides; the N support devices are arranged in an arc shape; the top of the frame (1) is provided with a laser head moving guide rail (4), and the bottom of the laser head moving device (3) is slidably connected to the frame (1) through the laser head moving guide rail (4); the frame (1) is provided with a laser head moving guide rail speed control box (5), which is used to control the travel speed of the laser head moving device (3); the focal length focusing lifting device (8) includes a mounting block A (8-1), a motor (8-2), a lead screw A (8-3), a slider A (8-4), and a focusing lifting device control box (9), wherein the mounting block A (8-1) 8-1) The laser head moving device (3) is slidably connected. The output end of the motor (8-2) is connected to the lead screw A (8-3). The lead screw A (8-3) is rotatably set inside the mounting block A (8-1). The slider A (8-4) is sleeved on the outer wall of the lead screw A (8-3). The side of the slider A (8-4) away from the laser head moving device (3) is connected to the laser head (15). The focusing lifting device control box (9) is set on the frame (1) and is used to control the forward and reverse rotation of the motor (8-2), drive the lead screw A (8-3) to rotate forward and reverse, and make the slider A (8-4) rise or fall.

2. The laser welding platform for both flat plates and cylinders according to claim 1, characterized in that, The frame (1) is provided with fine adjustment devices (23) on both sides. The fine adjustment device (23) includes mounting block B (23-1), lead screw B (23-2), and slider B (23-3). One side of the mounting block B (23-1) is located on the side of the frame (1). The lead screw B (23-2) is rotatably mounted inside the mounting block B (23-1). The slider B (23-3) is sleeved on the outer wall of the lead screw B (23-2). One side of the slider B (23-3) is provided with a protrusion (23-3-1). The other side of the mounting block B (23-1) is provided with a locking hole. The side of the laser head moving device (3) is provided with a guide rail lock (22) that matches the locking hole.

3. The laser welding platform for both flat plates and cylinders according to claim 1, characterized in that, The frame (1) has a folding plate (19) on the side near the flat welding magnetic platform (2), and the folding plate (19) is hinged to the frame (1).

4. The laser welding platform for both flat plates and cylinders according to claim 1, characterized in that, The conveying device includes several rubber rollers (21), the flat welding magnetic platform (2) is located on one side of the conveying device, and the cylindrical welding magnetic platform (11) is located between two rubber rollers at the tail of the transmission device; the cylindrical welding magnetic platform (11) is lower than the flat welding magnetic platform (2).

5. The laser welding platform for both flat plates and cylinders according to claim 1, characterized in that, The flat welding magnetic platform (2) is provided with a film roller (24) on one side.

6. The laser welding platform for both flat plates and cylinders according to claim 1, characterized in that, The laser (17) is electrically connected to the water cooling device (18); the laser (17) is connected to the laser head (15) through the optical fiber (20); a laser head translation guide rail (6) is provided on one side of the laser head moving device (3), and the focal length focusing lifting device (8) is slidably connected to the laser head moving device (3) through the laser head translation guide rail (6); a laser head translation control box (7) is provided inside the frame (1) to control the laser head translation guide rail (6) to translate in the weld direction.

7. The method of using the laser welding platform for both flat plates and cylinders as described in any one of claims 1-6, characterized in that, The method is as follows: Step S1: Take a piece of white paper of appropriate size for welding and place it on the flat welding magnetic platform (2) and the cylindrical welding magnetic platform (11) respectively and fix it; keep the welding platform clean; turn on the platform power and adjust the welding device; measure the thickness of the flat plate to be welded and set the welding parameters in the laser (17); cover the front of the flat plate with film; Step S2: Place the first plate face down and back up on the platform; the edge of the first plate is located in the middle of the plate welding magnetic platform (2); Step S3: Move the laser head (15) to one end of the first plate and observe whether the focus is on the edge of the first plate through the laser display (16). After adjusting the first plate to a suitable position, move the laser head (15) to the other end of the first plate and readjust the position of the edge of the first plate. Repeat this process multiple times until the focus movement trajectory coincides with the edge of the first plate. Step S4: Open the magnetic switch control box (12), fix the first plate with the flat plate welding magnetic platform (2), and then close the magnetic switch control box (12). Step S5: Place the second plate face down and back up on the platform; slowly move the second plate closer to the edge of the first plate until the edge of the second plate is in close contact with the edge of the first plate; Step S6: Open the magnetic switch control box (12) again, and fix the second plate with the flat plate welding magnetic platform (2); Step S7: By moving the laser head (15), readjust the focus and focal length, and then proceed with the welding work; Step S8: After welding is completed, close the magnetic switch control box (12), and at the same time move the first plate and the second plate after welding so that the edge of the second plate is located in the middle position of the plate welding magnetic platform (2). Step S9: Repeat steps S5-S8 for the following operations; and so on to complete the welding of the second plate and the third plate, as well as the welding of the penultimate plate and the last plate. Step S10: Move the welded flat plate as a whole into the cylindrical welding magnetic platform (11); the first flat plate enters the cylindrical welding lifting platform (13) as the conveying device moves, and the edge of the last flat plate is located in the middle of the cylindrical welding magnetic platform (11); Step S11: Move the laser head (15) above the cylindrical welding magnetic platform (11) using the laser head moving device (3); adjust the focal length using the laser display (16), adjust the edge of the last plate to coincide with the focal trajectory, open the magnetic switch control box (12), fix the last plate with the cylindrical welding magnetic platform (11), and then close the magnetic switch control box (12). Step S12: Control the cylindrical welding lifting platform (13) to slowly rise, so that the edge of the first plate slowly approaches the edge of the last plate until they fit tightly together; Step S13: Open the magnetic switch control box (12) again, and use the cylindrical welding magnetic platform (11) to fix the first plate; Step S14: By moving the laser head (15), readjust the focus and focal length, and then proceed with the welding work; Step S15: After welding is completed, turn off the magnetic switch control box (12); lower the cylindrical welding lifting platform (13) to the lowest position, and then slowly take out the welded cylindrical cylinder.

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