Laser welding device for heat exchange plate machining and welding method thereof

Abstract

The invention discloses a laser welding device for heat exchange plate machining, and provides the following scheme that the laser welding device comprises a laser welding head, a fixing frame is connected to the laser welding head, a rotating brush wheel is connected to the fixing frame, an inductance heating block is connected to one side of the fixing frame, and a fixing cylinder is installed on the side, located on the laser welding head, of the fixing frame; a plurality of layers of rebound rings are mounted on the inner wall of the fixing cylinder, and an air suction pipe is mounted on the fixing frame; when the heat exchange plate of the electric automobile is subjected to laser welding through the laser welding head, the heat exchange plate of the electric automobile is heated through the inductance heating block, so that burrs on the surface of the heat exchange plate are softened, the air density is reduced, the heat exchange plate of the electric automobile is preheated, and the surface of the heat exchange plate is cleaned through the brush wheel; and the exhaust gas is collected through the gas suction pipe, particles are screened through the brush wheel, the smoke particles can be beaten and intercepted through rotation of the brush wheel, the particles are thrown out, and the multifunctionality of the brush wheel is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and particularly relates to a laser welding device for heat exchange plate processing and a welding method thereof. Background Art

[0002] With the rapid development of electric vehicles, the thermal management of batteries, motors, and electronic control systems has become the focus of ensuring vehicle performance and safety. As the core component of the thermal management system, the heat exchange plate is responsible for cooling or heating the battery pack, and its manufacturing quality directly affects the efficiency and reliability of the system.

[0003] Traditional welding technologies such as resistance welding or arc welding have problems such as large heat-affected zones, serious deformation, and unstable weld quality when welding heat exchange plates, making it difficult to meet the requirements of high precision and high tightness. Laser welding technology, with its advantages of high energy density, precise control, and small heat-affected zone, has become an ideal choice for heat exchange plate manufacturing. Laser welding can achieve high-quality connection of thin plate materials, ensure the tightness and strength of the weld, improve production efficiency and consistency at the same time, and meet the needs of electric vehicles for lightweight and high-performance components. Therefore, laser welding technology has been widely used in the manufacturing of electric vehicle heat exchange plates.

[0004] However, in the actual use process, there are still some problems with traditional laser welding and similar technical solutions: 1. During laser welding operations, electric vehicle heat exchange plates are often directly welded without preheating treatment. Due to the significant temperature difference between the electric vehicle heat exchange plate and the welding molten pool, deformation is likely to occur during the cooling stage after welding, increasing the risk of cracking at the welding site. In addition, a large amount of air often remains in the gaps in the intersection area of the electric vehicle heat exchange plate. During the welding process, this air is likely to penetrate into the molten pool, resulting in the formation of bubbles, which in turn has an adverse impact on the welding quality. 2. When directly cleaning the surface of the electric vehicle heat exchange plate with a brush wheel, a technical problem faced is that at room temperature, metal burrs have high hardness and adhesion, and it is difficult to effectively remove them with a brush wheel, resulting in unsatisfactory cleaning effects. 3. The spatter particles generated during the welding operation have high adhesiveness and are prone to redeposit on the welding area again. This not only interferes with the stability of the welding process but also may have a negative impact on the welding quality. At the same time, the harmful gases released during welding (such as welding fumes, particulate matter, carbon monoxide, nitrogen oxides, etc.) pose a potential threat to the respiratory health of the operators. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a laser welding device for electric vehicle heat exchange plate processing and a welding method thereof that can ensure the stability of the molten pool, reduce the formation of bubble spatter, facilitate the removal of burrs, and effectively solve harmful gases.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A laser welding device for processing a heat exchange plate, comprising a laser welding head, the laser welding head is connected to a cleaning mechanism, the cleaning mechanism comprises a fixing frame, the laser welding head is connected to a fixing frame, a vertical second motor is installed at the bottom end of the fixing frame, protective shells are installed on both sides of the bottom end of the fixing frame, a rotating brush wheel is connected inside the protective shell, and the bottom end of the brush wheel extends out of the bottom of the protective shell; The fixing frame is connected to a heating mechanism, the heating mechanism comprises an inductive heating block, and the fixing frame is connected to the inductive heating block on a side away from the laser welding head; The fixing frame is connected with an anti-rebound mechanism, which includes a fixing cylinder. The fixing frame is located on one side of the laser welding head and is equipped with a fixing cylinder. The laser welding head extends into the interior of the fixing cylinder. The inner wall of the fixing cylinder is equipped with a multi-layer rebound ring, which is arc-shaped and connected with a rotating scraper. A guide pipe is installed on the outer wall of the fixed cylinder, and the guide pipe is connected to the bottom end of the rebound ring. Through grooves are provided on both sides of the protective shell. The other end of the guide pipe is installed on the protective shell on one side and connected to the through groove on the outside. An air suction pipe is installed on the fixed frame, and the air suction pipe is connected to the through groove in the middle position. The end of the air suction pipe is installed on the air pump.

[0007] Preferably, the pair of brush wheels are parallel, the pair of brush wheels rotate in opposite directions, and the laser welding head and the pair of brush wheels are located on the same straight line.

[0008] Preferably, the intake pipe extends between a pair of protective shells, a transverse pipe is installed between the pair of protective shells, the transverse pipe is connected with two through grooves in the middle position, the bottom end of the intake pipe is installed on the transverse pipe, the intake pipe is connected with the through groove in the middle position through the transverse pipe, the guide pipe is installed with a connecting pipe close to the through groove, the other end of the connecting pipe is installed on the intake pipe, and the connecting pipe is connected with the intake pipe.

[0009] Preferably, the guide tube is inclined from the fixed tube toward the through groove, the rebound ring is provided with a through groove, and the through groove on the rebound ring at the bottom layer is closed.

[0010] Preferably, a transmission assembly is connected between the second motor and the brush wheel, the transmission assembly includes a second bevel gear, a second bevel gear is installed on the output shaft of the second motor, the bottom end of the fixed frame is rotatably connected to a rotating shaft, both ends of the rotating shaft are rotatably connected to first bevel gears, the brush wheel is installed on one side of the first bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0011] Preferably, a driving assembly is connected between the scraper and the second motor, the driving assembly includes a fourth gear, the fourth gear is installed on the output shaft of the second motor, the top end of the fixed cylinder is rotatably connected to a rotating tube, the scraper is fixed to the inner side of the rotating tube, a third gear is installed on the rotating tube, and a meshing toothed belt is installed between the third gear and the fourth gear.

[0012] Preferably, a rotating assembly is connected between the laser welding head and the fixed frame, and the rotating assembly includes a rotating ring. A rotating ring is sleeved on the top of the laser welding head, and a first gear is installed on the rotating ring. The first gear is an internal gear. A first motor is installed on one side of the laser welding head, and a second gear is installed on the output shaft of the first motor, and the second gear is meshed with the first gear.

[0013] Preferably, an electric push rod is installed on the side of the rotating ring away from the laser welding head, and the fixing frame is installed on the telescopic end of the electric push rod.

[0014] Preferably, a mounting block is installed on the side of the fixing frame facing away from the laser welding head, the inductive heating block is slidably connected to the mounting block, an elastic sheet is installed between the inductive heating block and the mounting block, and a protrusion is installed at the bottom end of the inductive heating block.

[0015] The laser welding device and welding method for heat exchange plate processing include the following steps: S1. Align the laser welding head with the weld, and place the mounting block close to the weld. The convex point will contact the surface of the electric vehicle heat exchange plate, push the inductive heating block to slide inside the mounting block, and compress the elastic sheet of the plastic material, thereby ensuring the distance between the inductive heating block and the electric vehicle heat exchange plate. The metal electric vehicle heat exchange plate is heated by the inductive heating block, so that the burrs on the surface of the electric vehicle heat exchange plate are softened, and the air on the surface of the electric vehicle heat exchange plate is expanded to reduce the air density; S2, the laser welding head moves along the direction of the inductive heating block, and the brush wheel rotates to clean the surface of the electric vehicle heat exchange plate. The particles on the surface of the electric vehicle heat exchange plate and the burrs after heating and softening are brushed off by the brush wheel; S3. The particles spattered by welding are intercepted by the rebound ring, and the scraper rotates to push the particles into the guide pipe. The suction pump at the end of the suction pipe is started to form a negative pressure area between the rebound ring layers. The exhaust gas enters the guide pipe and is sucked into the suction pipe through the connecting pipe. The particles flow through the groove and are intercepted and thrown out by the brush wheel. The brush wheel hits and intercepts the smoke particles, and the particles are thrown out and the gas is extracted.

[0016] Compared with the prior art, the present invention provides a laser welding device for heat exchange plate processing, which has the following beneficial effects: 1. When laser welding the heat exchange plate of an electric vehicle through a laser welding head, align the laser welding head with the weld, start the first motor, position the electric push rod above the weld, start the electric push rod, and place the mounting block close to the weld. The convex point will contact the surface of the heat exchange plate of the electric vehicle. When the heights of the two heat exchange plates of the electric vehicle are inconsistent, the inductive heating block can be pushed to slide inside the mounting block, thereby ensuring the spacing between the inductive heating block and the heat exchange plate of the electric vehicle. The metal heat exchange plate of the electric vehicle is heated by the inductive heating block, thereby softening the burrs on the surface of the heat exchange plate of the electric vehicle, and at the same time causing the air on the surface of the heat exchange plate of the electric vehicle to expand and rise, reducing the air density, and preheating the heat exchange plate of the electric vehicle to reduce the thermal stress generated during the welding process, thereby preventing welding deformation, reducing the hardening tendency of the weld and the heat affected zone, and thus reducing the risk of cracks.

[0017] 2. The laser welding head moves along the direction of the inductive heating block, and the second motor is started to drive a pair of brush wheels to rotate in opposite directions. The brush wheels can clean the surface of the electric vehicle heat exchange plate. At the same time, the burrs on the surface of the electric vehicle heat exchange plate after heating and softening can be easily brushed off by the brush wheels and thrown away, thereby avoiding instability, splashing and sputtering of the welding molten pool during the welding process, and reducing the probability of air bag formation.

[0018] 3. During the welding process, the splashing particles are intercepted by the rebound ring to avoid secondary attachment to the electric vehicle heat exchange plate and affecting the welding. The scraper slides on the surface of the rebound ring to promote the movement of the particles. The particles flow to the through slot through the guide pipe, and the suction pump at the end of the suction pipe is started to give the suction pipe a negative pressure, so that a negative pressure area is formed between the rebound ring layers, which is convenient for collecting welding waste gas. The particles are heavier and pass through the through slot. They are intercepted and thrown out by the brush wheel. The suction pipe forms a negative pressure in the through slot area inside the protective shell and at the mounting block through the transverse pipe, so that the smoke generated by heating can be inhaled and harmful gases are extracted. At the same time, the rotating brush wheel plays a screening role. The rotation of the brush wheel can hit and intercept the smoke particles, so that the particles are thrown out, realizing the versatility of the brush wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional view of a laser welding device for processing a heat exchange plate and a welding method thereof proposed by the present invention; Figure 2 A view of the connection structure of the fixing cylinder of the present invention; Figure 3 A view of the connection structure of the scraper of the present invention; Figure 4 A view of the connection structure of the rebound ring of the present invention; Figure 5 A view of a connection structure of a toothed belt according to the present invention; Figure 6 View of the connection structure of the protective shell of the present invention; Figure 7 View of the connection structure of the brush wheel of the present invention; Figure 8 View of the connection structure of the second bevel gear of the present invention; Figure 9 View of the connection structure of the mounting block of the present invention; Figure 10 View of the connection structure of the inductive heating block of the present invention; Figure 11 View of the rebound path and normal line of the rebound ring of the present invention.

[0020] In the figure: 1, laser welding head; 2, heating mechanism; 21, mounting block; 22, inductive heating block; 23, bump; 24, elastic sheet; 3, cleaning mechanism; 31, electric push rod; 32, fixing frame; 33, rotating assembly; 331, first gear; 332, rotating ring; 333, first motor; 334, second gear; 34, protective shell; 35, second motor; 36, brush wheel; 37, transmission assembly; 371, first bevel gear; 372, rotating shaft; 373, second bevel gear; 4, anti-rebound mechanism; 41, rebound ring; 42, diversion pipe; 43, drive assembly; 431, scraper; 432, toothed belt; 433, third gear; 434, fourth gear; 435, through groove; 436, rotating pipe; 44, fixed cylinder; 45, suction pipe; 46, connecting pipe; 47, through slot; 48, cross pipe. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] Embodiment 1: Refer to Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8A laser welding device for processing a heat exchange plate comprises a laser welding head 1, to which a cleaning mechanism 3 is connected, the cleaning mechanism 3 comprises a fixing frame 32, to which the laser welding head 1 is connected, a second vertical motor 35 is mounted at the bottom end of the fixing frame 32, protective shells 34 are mounted on both sides of the bottom end of the fixing frame 32, a rotating brush wheel 36 is connected inside the protective shell 34, the bottom end of the brush wheel 36 extends out of the bottom of the protective shell 34, and the brush wheel 36 can clean particles on the surface of the heat exchange plate of the electric vehicle when rotating, thereby avoiding affecting the welding effect.

[0024] In the present invention, a pair of brush wheels 36 are parallel and rotate in opposite directions. The laser welding head 1 and the pair of brush wheels 36 are located on the same straight line, and thus rotate in opposite directions, thereby improving the cleaning efficiency.

[0025] In the present invention, a transmission assembly 37 is connected between the second motor 35 and the brush wheel 36, and the transmission assembly 37 includes a second bevel gear 373. The second bevel gear 373 is installed on the output shaft of the second motor 35. The bottom end of the fixed frame 32 is rotatably connected to the rotating shaft 372, and both ends of the rotating shaft 372 are rotatably connected to the first bevel gear 371. The brush wheel 36 is installed on one side of the first bevel gear 371, and the first bevel gear 371 is meshed with the second bevel gear 373, so as to facilitate the second motor 35 to drive a pair of brush wheels 36 to rotate.

[0026] In the present invention, a rotating assembly 33 is connected between the laser welding head 1 and the fixed frame 32, and the rotating assembly 33 includes a rotating ring 332. The top of the laser welding head 1 is sleeved with a rotating rotating ring 332, and a first gear 331 is installed on the rotating ring 332. The first gear 331 is an internal gear. A first motor 333 is installed on one side of the laser welding head 1, and a second gear 334 is installed on the output shaft of the first motor 333. The second gear 334 is meshed with the first gear 331, so as to facilitate the adjustment of the position of the brush wheel 36 so that the brush wheel 36 is located in front of the laser welding head 1, so as to facilitate welding after cleaning.

[0027] In the present invention, an electric push rod 31 is installed on the side of the rotating ring 332 away from the laser welding head 1, and a fixing frame 32 is installed on the telescopic end of the electric push rod 31, so as to facilitate the adjustment of the contact force between the brush wheel 36 and the heat exchange plate of the electric vehicle.

[0028] Example 2: Based on Example 1 Figure 9 and Figure 10 A laser welding device for processing a heat exchange plate, a heating mechanism 2 is connected to a fixing frame 32, the heating mechanism 2 includes an inductive heating block 22, and the inductive heating block 22 is connected to the side of the fixing frame 32 away from the laser welding head 1, so as to facilitate heating of the heat exchange plate of the electric vehicle.

[0029] In the present invention, an installation block 21 is installed on the side of the fixing bracket 32 facing away from the laser welding head 1. The inductive heating block 22 is slidably connected to the installation block 21. An elastic sheet 24 is installed between the inductive heating block 22 and the installation block 21. A bump 23 is installed at the bottom end of the inductive heating block 22, so as to ensure the distance between the inductive heating block 22 and the heat exchange plate of the electric vehicle, ensure uniform heating, and at the same time reduce contact scratches.

[0030] Example 3: On the basis of Example 2, referring to Figure 3 、 Figure 4 、 Figure 5 and Figure 11 ,a laser welding device for processing a heat exchange plate, a rebound prevention mechanism 4 is connected to the fixing bracket 32. The rebound prevention mechanism 4 includes a fixing cylinder 44. A fixing cylinder 44 is installed on the fixing bracket 32 on one side of the laser welding head 1. The laser welding head 1 extends into the interior of the fixing cylinder 44. A plurality of layers of rebound rings 41 are installed on the inner wall of the fixing cylinder 44. The rebound rings 41 are arc-shaped, which is convenient for collecting splashed particles. A rotating scraper 431 is connected to the rebound rings 41, which is convenient for processing the accumulated particles. A diversion pipe 42 is installed on the outer wall of the fixing cylinder 44. The diversion pipe 42 is communicated with the bottom end of the rebound rings 41. Through grooves 47 are provided on both sides of the protective shell 34. The other end of the diversion pipe 42 is installed on one side of the protective shell 34 and communicated with the outer through groove 47. An air suction pipe 45 is installed on the fixing bracket 32. The air suction pipe 45 is communicated with the through groove 47 in the middle position. The end of the air suction pipe 45 is installed on an air extraction pump, so as to facilitate the formation of negative pressure and facilitate the extraction of toxic gases.

[0031] In the present invention, the air suction pipe 45 extends between a pair of protective shells 34. A cross pipe 48 is installed between the pair of protective shells 34. The cross pipe 48 is communicated with the two through grooves 47 in the middle position. The bottom end of the air suction pipe 45 is installed on the cross pipe 48. The air suction pipe 45 is communicated with the through groove 47 in the middle position through the cross pipe 48. A communicating connecting pipe 46 is installed at the position where the diversion pipe 42 is close to the through groove 47. The other end of the connecting pipe 46 is installed on the air suction pipe 45. The connecting pipe 46 is communicated with the air suction pipe 45, so as to facilitate the formation of negative pressure at the brush wheel 36.

[0032] In the present invention, the diversion pipe 42 is inclined from the fixing cylinder 44 towards the through groove 47. A through groove 435 is provided on the rebound rings 41. The through groove 435 on the bottommost layer of the rebound rings 41 is closed, so as to facilitate the flow of particles towards the through groove 47.

[0033] In the present invention, a driving assembly 43 is connected between the scraping plate 431 and the second motor 35. The driving assembly 43 includes a fourth gear 434. The fourth gear 434 is installed on the output shaft of the second motor 35. The top end of the fixed cylinder 44 is rotatably connected to a rotating pipe 436. The scraping plate 431 is fixed to the inner side of the rotating pipe 436. A third gear 433 is installed on the rotating pipe 436. A toothed belt 432 in mesh is installed between the third gear 433 and the fourth gear 434, thereby facilitating the driving of the scraping plate 431 to move.

[0034] Working principle: When laser welding the heat exchange plate of an electric vehicle through the laser welding head 1, align the laser welding head 1 with the weld seam, start the first motor 333. The first motor 333 drives the second gear 334 to rotate, thereby driving the first gear 331 to rotate. The first gear 331 drives the rotating ring 332 to rotate, so that the electric push rod 31 is located above the weld seam. Start the electric push rod 31, and the electric push rod 31 extends, thereby pushing the fixed frame 32 downward, making the mounting block 21 close to the weld seam. The ceramic bump 23 will contact the surface of the heat exchange plate. The bump 23 is conical. Thus, when the heights of the two heat exchange plates of the electric vehicle are inconsistent, it can push the inductive heating block 22 to slide into the mounting block 21, and the elastic sheet 24 made of plastic is compressed, thereby ensuring the distance between the inductive heating block 22 and the heat exchange plate of the electric vehicle. Heat the metal heat exchange plate of the electric vehicle through the inductive heating block 22, thereby softening the burrs on the surface of the heat exchange plate of the electric vehicle. At the same time, the air on the surface of the heat exchange plate of the electric vehicle expands and rises, reducing the air density. At the same time, preheat the heat exchange plate of the electric vehicle, reduce the thermal stress generated during the welding process, thereby preventing welding deformation, reducing the hardening tendency of the weld seam and the heat affected zone, and thus reducing the risk of crack generation; The laser welding head 1 moves along the direction of the inductive heating block 22. Start the second motor 35. The second motor 35 drives the second bevel gear 373 to rotate, thereby driving a pair of first bevel gears 371 to rotate in opposite directions, driving a pair of brush wheels 36 to rotate in opposite directions. The brush wheels 36 can clean the surface of the heat exchange plate of the electric vehicle. At the same time, the softened burrs on the surface of the heat exchange plate of the electric vehicle can be easily brushed off by the brush wheels 36 and thrown away, thereby avoiding the instability, spatter and splash of the welding molten pool during the welding process, and reducing the probability of air bag formation; During the welding process, fumes and fine particle splashes are generated. The fine particles are intercepted by the rebound ring 41. The rebound ring 41 is arc-shaped, and the reflection normal of the upper-layer rebound ring 41 is located within the rebound ring 41, thus avoiding particle splashes, preventing secondary adhesion to the heat exchange plate of the electric vehicle, and avoiding affecting the welding. When the second motor 35 operates, it drives the fourth gear 434 to rotate, thereby driving the third gear 433 to rotate through the toothed belt 432, driving the rotating tube 436 to rotate, and causing the scraper 431 to slide on the surface of the rebound ring 41, thus pushing the particles to move. The particles fall to the bottom layer through the through slot 435 and then enter the diversion tube 42. Since the diversion tube 42 is inclined, the particles will flow towards the through slot 47. The suction pump at the end of the suction pipe 45 is started, thereby creating negative pressure in the suction pipe 45. The connecting pipe 46 is connected, thus creating negative pressure inside the diversion tube 42 and forming a negative pressure area between the layers of the rebound ring 41, facilitating the collection of welding exhaust gas. The exhaust gas enters the diversion tube 42 and is sucked into the suction pipe 45 through the connecting pipe 46, thus facilitating centralized treatment. The particles are heavier and flow into the internal of the through slot 47 and are intercepted and thrown out by the action of the brush wheel 36. Since the brush wheel 36 rotates, the particles will not stay on the surface of the heat exchange plate of the electric vehicle, so that they fall into the storage area of the welding machine tool, facilitating later treatment. The suction pipe 45 creates negative pressure inside the protective housing 34 and in the area of the through slot 47 at the mounting block 21 through the horizontal pipe 48, so that the smoke generated by heating can be sucked in and the harmful gases are extracted. At the same time, the rotating brush wheel 36 plays a screening role. The rotation of the brush wheel 36 can strike and intercept the smoke particles, causing the particles to be thrown out and the gas to be extracted, realizing the versatility of the brush wheel 36.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A laser welding device for processing a heat exchange plate, comprising a laser welding head, wherein a cleaning mechanism is connected to the laser welding head, and wherein: The cleaning mechanism comprises a fixing frame, the laser welding head is connected with the fixing frame, a vertical second motor is installed on the bottom end of the fixing frame, protective shells are installed on both sides of the bottom end of the fixing frame, a rotating brush wheel is connected in the protective shell, and the bottom end of the brush wheel extends out of the bottom of the protective shell; The fixing frame is connected to a heating mechanism, the heating mechanism comprises an inductive heating block, and the fixing frame is connected to the inductive heating block on a side away from the laser welding head; The fixing frame is connected with an anti-rebound mechanism, which includes a fixing cylinder. The fixing frame is located on one side of the laser welding head and is equipped with a fixing cylinder. The laser welding head extends into the interior of the fixing cylinder. The inner wall of the fixing cylinder is equipped with a multi-layer rebound ring, which is arc-shaped and connected with a rotating scraper. A guide pipe is installed on the outer wall of the fixed cylinder, and the guide pipe is connected to the bottom end of the rebound ring. Through grooves are provided on both sides of the protective shell. The other end of the guide pipe is installed on the protective shell on one side and connected to the through groove on the outside. An air suction pipe is installed on the fixed frame, and the air suction pipe is connected to the through groove in the middle position. The end of the air suction pipe is installed on the air pump.

2. A laser welding device for heat exchange plate processing according to claim 1, characterized in that: The pair of brush wheels are parallel, the pair of brush wheels rotate in opposite directions, and the laser welding head and the pair of brush wheels are located on the same straight line.

3. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: The intake pipe extends between a pair of protective shells, a transverse pipe is installed between the pair of protective shells, the transverse pipe is connected with two through slots in the middle position, the bottom end of the intake pipe is installed on the transverse pipe, the intake pipe is connected with the through slot in the middle position through the transverse pipe, the guide pipe is installed with a connecting pipe close to the through slot, the other end of the connecting pipe is installed on the intake pipe, and the connecting pipe is connected with the intake pipe.

4. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: The guide tube is inclined from the fixed tube to the through groove direction, the rebound ring is provided with a through groove, and the through groove on the rebound ring at the bottom layer is closed.

5. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: A transmission assembly is connected between the second motor and the brush wheel, and the transmission assembly includes a second bevel gear. The second bevel gear is installed on the output shaft of the second motor. The bottom end of the fixed frame is rotatably connected to a rotating shaft, and both ends of the rotating shaft are rotatably connected to the first bevel gear. The brush wheel is installed on one side of the first bevel gear, and the first bevel gear is meshed with the second bevel gear.

6. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: A driving assembly is connected between the scraper and the second motor, and the driving assembly includes a fourth gear. The fourth gear is installed on the output shaft of the second motor. The top end of the fixed cylinder is rotatably connected to a rotating tube. The scraper is fixed to the inner side of the rotating tube. A third gear is installed on the rotating tube. A meshing toothed belt is installed between the third gear and the fourth gear.

7. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: A rotating assembly is connected between the laser welding head and the fixed frame, and the rotating assembly includes a rotating ring. A rotating ring is sleeved on the top of the laser welding head, and a first gear is installed on the rotating ring. The first gear is an internal gear. A first motor is installed on one side of the laser welding head, and a second gear is installed on the output shaft of the first motor. The second gear is meshed with the first gear.

8. The laser welding device for heat exchange plate processing according to claim 7, characterized in that: An electric push rod is installed on the side of the rotating ring away from the laser welding head, and the fixing frame is installed on the telescopic end of the electric push rod.

9. The laser welding device for heat exchange plate processing according to claim 1, characterized in that: A mounting block is installed on the side of the fixing frame away from the laser welding head, the inductive heating block is slidably connected to the mounting block, an elastic sheet is installed between the inductive heating block and the mounting block, and a protrusion is installed at the bottom end of the inductive heating block.

10. A welding method for a laser welding device for processing a heat exchange plate according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Align the laser welding head with the weld, and place the mounting block close to the weld. The convex point will contact the surface of the electric vehicle heat exchange plate, push the inductive heating block to slide inside the mounting block, and compress the elastic sheet of the plastic material, thereby ensuring the distance between the inductive heating block and the electric vehicle heat exchange plate. The metal electric vehicle heat exchange plate is heated by the inductive heating block, so that the burrs on the surface of the electric vehicle heat exchange plate are softened, and the air on the surface of the electric vehicle heat exchange plate is expanded to reduce the air density; S2, the laser welding head moves along the direction of the inductive heating block, and the brush wheel rotates to clean the surface of the electric vehicle heat exchange plate. The particles on the surface of the electric vehicle heat exchange plate and the burrs after heating and softening are brushed off by the brush wheel; S3. The particles spattered by welding are intercepted by the rebound ring, and the scraper rotates to push the particles into the guide pipe. The suction pump at the end of the suction pipe is started to form a negative pressure area between the rebound ring layers. The exhaust gas enters the guide pipe and is sucked into the suction pipe through the connecting pipe. The particles flow through the groove and are intercepted and thrown out by the brush wheel. The brush wheel hits and intercepts the smoke particles, and the particles are thrown out and the gas is extracted.

Images