Laser welding device and welding protective cover

Abstract

The invention relates to the field of laser welding, and discloses a laser welding device, comprising a workbench, a welding system and a protective cover body. The welding system is located in the protective cover body, a monitoring system is arranged in the protective cover body, and a monitoring terminal and a control terminal are arranged outside the protective cover body. An operator can realize automatic welding by programming and adjusting the control terminal according to actual data of a workpiece to be welded, so that the operator can control the control terminal outside the protective cover to realize laser welding inside the protective cover, thereby preventing the operator from being directly irradiated with laser ultraviolet rays and causing physical damage, and realizing more efficient and safer laser welding operations. A plurality of workbenches are arranged, and each workbench can orderly transport the workpiece to be welded into the protective cover body for welding processing, thereby realizing the purpose of multi-station processing, and at the same time realizing efficient heat dissipation of the welding environment through a heat dissipation component.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a laser welding device and a welding protective cover. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. During the laser welding process, laser radiation heats the workpiece surface, and the surface heat diffuses to the inside through heat conduction. By controlling parameters such as the width, energy, peak power, and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully used in the precision welding of micro and small parts.

[0003] Based on the development trend of automated production lines, laser welding is also gradually developing towards automation and closedness. Figure 1 As shown, the laser welding structure is arranged inside the protective cover, a monitoring system is arranged inside the protective cover, and a control terminal and a monitoring terminal are arranged outside the protective cover. The operator can realize automatic welding by programming and adjusting the control terminal according to the actual data of the workpiece to be welded, and the operator can control the control terminal outside the protective cover to realize laser welding inside the protective cover, thereby avoiding the operator from being directly exposed to the laser ultraviolet rays and causing physical injuries, and realizing more efficient and safer laser welding operations. However, on the one hand, this method will make the entire welding process in a closed area, and air circulation is difficult. On the other hand, a large amount of heat will inevitably be generated during the laser welding process. Therefore, this heat will accumulate in the closed area and be difficult to dissipate. Therefore, the present invention proposes a laser welding device and a welding protective cover that can improve the heat dissipation effect in the protective cover. Summary of the invention

[0004] In order to solve the problems mentioned in the above background, the present invention provides a laser welding device and a welding protective cover.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0006] A laser welding device comprises a welding shield and a welding system, wherein the welding shield comprises a shield body and a heat dissipation component arranged at the upper end of the shield body, and the welding system is arranged in the shield body;

[0007] An inlet and outlet are respectively arranged on the two side surfaces along the length direction of the protective cover body and a gate is matched and installed at each inlet and outlet. The welding system includes a workbench which can move along the length direction of the protective cover body. A plurality of workbenches are arranged in an array along their own movement direction. The workbench is used to place the workpiece to be welded. The welding system is used to realize laser welding of the workpiece. The heat dissipation component is used to dissipate heat and cool the internal environment of the protective cover body.

[0008] Furthermore, the heat dissipation component includes two circulation ports and a heat dissipation component located therebetween. Both circulation ports can move with the welding system, and the circulation ports and the heat dissipation component are connected via a hose.

[0009] Furthermore, the circulation port includes a fixed tube connected to the welding end of the welding system, the fixed tube is connected to the heat dissipation assembly, an air guide shell is arranged at the bottom of the fixed tube, the opening of the air guide shell is facing the welding end of the welding system, and a plurality of air guide plates are arranged in an array along the vertical direction in the air guide shell, the air guide plates include a horizontal plate perpendicular to the plane where the opening of the air guide shell is located and an inclined plate arranged on the side of the horizontal plate away from the opening of the air guide shell, and the lowest point of the inclined plate is connected to the horizontal plate.

[0010] Furthermore, the heat dissipation assembly includes a lower cover shell and an upper cover shell, the upper end of the upper cover shell is closed and the lower end is open, the lower end of the lower cover shell is closed and the upper end is open, and the lower opening of the upper cover shell is coaxially connected with the upper opening of the lower cover shell;

[0011] An upper spacer is installed in the upper cover shell through an upper bracket, a connecting cover is coaxially arranged at the upper opening of the upper spacer, an internal circulation air pipe 1 is connected to the upper end of the connecting cover, an upper fan is arranged in the upper spacer, a lower opening of the upper spacer is blocked by the upper bracket, and an exhaust hole is opened on the outer circumferential surface of the upper cover shell;

[0012] A lower spacer is installed in the lower housing through a lower bracket, an upper opening of the lower spacer is blocked by the upper bracket, and a lower opening is blocked by the lower bracket, a second motor is installed in the lower spacer, a connecting hole for connecting the upper spacer with the lower spacer is provided in the upper bracket, and a notch is provided on the outer circumference of the lower spacer;

[0013] A lower fan located below the lower spacer is arranged in the lower cover shell, two ends of the output shaft of the second motor are respectively connected to the upper fan and the lower fan, and an air inlet hole is opened at the lower closed end of the lower cover shell.

[0014] Furthermore, the upper fan and the lower fan have the same size and shape.

[0015] Furthermore, a heat exchange unit is installed between the lower spacer and the lower cover shell, and the heat exchange unit includes a heat exchange ring coaxially located on the periphery of the lower spacer, the upper and lower openings of the heat exchange ring are respectively blocked by the upper bracket and the lower bracket, the outer wall of the heat exchange ring is provided with a mounting hole, the orifice of the mounting hole is connected to a side pipe, a plurality of outer fins are arranged in an array between the outer wall of the heat exchange ring and the wall of the lower cover shell, and a plurality of inner fins are arranged in an array between the inner wall of the heat exchange ring and the outer wall of the lower spacer.

[0016] Furthermore, the inner fins are in a circular shape, and are arranged in an array along the axial direction of the heat exchange ring. The upper surface of the inner fins is provided with folds, and corresponding fold grooves are formed on the lower surface of the inner fins. Several folds are arranged in an array along the circumferential direction of the inner fins, and the folds on two adjacent inner fins are arranged in an alternating manner.

[0017] Furthermore, the folds are arranged in an arc shape.

[0018] Furthermore, the end of the inner circulation air pipe 1 is connected to a circulation port, the end of the side pipe extends out of the lower cover shell and is connected to the inner circulation air pipe 2, and the end of the inner circulation air pipe 2 is connected to another circulation port.

[0019] Furthermore, a fixing convex sleeve extends from the upper end of the protective cover body, an outer hole is arranged on the outer circumferential surface of the fixing convex sleeve, and an outer bottom hole located in the fixing convex sleeve is arranged on the upper end of the protective cover body;

[0020] A rotating sleeve is coaxially provided in the fixed convex sleeve, the lower end of the rotating sleeve is closed, the upper end is open and is rotatably connected with the lower closed end of the lower cover shell, a motor for driving the rotating sleeve to rotate is provided in the protective cover body, an inner hole is provided on the outer circumferential surface of the rotating sleeve, during the rotation of the rotating sleeve, the inner hole can be connected with the outer hole or the inner hole is blocked by the inner wall of the fixed convex sleeve, an inner bottom hole is provided on the lower closed end of the rotating sleeve, during the rotation of the rotating sleeve, the inner bottom hole can be connected with the outer bottom hole or the inner bottom hole is blocked by the upper surface of the protective cover body;

[0021] A bottom plate is arranged at the bottom of the protective cover body, the interior of the bottom plate is hollow, one side of the bottom plate is connected to the vent arranged on the inner wall of the protective cover body and a plurality of side vent holes are arranged in an array on this side of the bottom plate, and a plurality of upper vent holes are arranged on the upper end surface of the bottom plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] When the internal circulating air of the protective cover body flows in the heat exchange unit, since the side pipe and the notch are located on both sides of the lower spacer, the air needs to flow along the area between the heat exchange ring and the lower spacer before it can enter the lower spacer. During this process:

[0024] a. Since the heat exchange ring and the lower spacer are both in the shape of a ring, the air flow trajectory is circular. Under the action of centrifugal force, the air will approach the inner wall of the heat exchange ring, thereby transferring the heat to the outer fins more efficiently and quickly. At the same time, the flow of the external airflow will take away the heat of the outer fins, so the heat dissipation effect is better;

[0025] b. When the air flows toward the inner wall of the heat exchange ring, as shown in the figure, it will pass through the narrow area and the wide area. After entering the wide area, the speed of the air will slow down, and after entering the narrow area, the speed will speed up. Therefore, the air will collide at the connection between the wide area and the narrow area. Preferably, as shown in the figure, the folds can be arranged in an arc shape. In this way, the air needs to pass through multiple narrow areas and wide areas before it can approach the inner wall of the heat exchange ring, that is, it will approach the inner wall of the heat exchange ring after experiencing multiple collisions. After that, when flowing toward the notch, it will experience multiple collisions before entering the lower spacer. The collision is equivalent to stirring the air, which can make each part of the air contact with the heat exchange ring, thereby improving the effect of transferring heat to the outer fins;

[0026] c. In the present application, the upper fan and the lower fan are driven by a second motor to run together. Since the upper fan and the lower fan have the same size and shape, the wind force generated by the operation of the two is also the same. In addition, since the air collides during the flow in the heat exchange unit, the flow rate will be slowed down. Therefore, the flow rate of the external air flow will be significantly greater than the flow rate of the internal circulation air. In this way, on the one hand, the internal circulation air has enough time to transfer the heat to the heat exchange unit, and the external air flow can quickly take away the heat from the heat exchange unit. The combination of the two can improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the prior art;

[0028] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0029] Figure 3 It is an internal schematic diagram of the present invention;

[0030] Figure 4 It is a schematic diagram of the heat dissipation component and the circulation port of the present invention;

[0031] Figure 5 is a schematic diagram of the upper end of the protective cover body;

[0032] Figure 6 It is a cross-sectional view of the circulation port;

[0033] Figure 7 is a three-dimensional schematic diagram of a heat dissipation component;

[0034] Figure 8 is a cross-sectional view of a heat dissipation component;

[0035] Fig. 9 is a partial schematic diagram of a heat dissipation component;

[0036] Fig.10 is a cross-sectional view of the heat exchange unit, the lower cover and the lower spacer;

[0037] Fig.11 is a schematic diagram of the inner fin;

[0038] Fig.12 Schematic diagram of the folds on two adjacent inner fins.

[0039] The reference numerals in the accompanying drawings are:

[0040] 100, protective cover body; 101, gate; 102, inlet and outlet; 103, workbench; 104, welding system; 105, bottom plate; 106, fixed convex sleeve; 107, outer hole; 108, outer bottom hole; 200, heat dissipation component; 201, fixed pipe; 202, air guide shell; 2021, air guide plate; 203, intubation; 204, internal circulation air pipe 1; 2041, connecting cover; 205, internal circulation air pipe 2; 206, filter unit; 207, exhaust pipe; 208, lower cover shell ; 2081, lower spacer; 2082, notch; 2083, air inlet; 209, upper cover; 2091, upper spacer; 210, rotating sleeve; 2101, inner hole; 2102, inner bottom hole; 211, motor one; 212, motor two; 213, lower fan; 214, upper fan; 215, heat exchange unit; 2151, heat exchange ring; 2152, side pipe; 2053, outer fin; 2054, inner fin; 2055, fold; 2056, narrow area; 2057, wide area. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0042] Embodiment 1

[0043] Reference Figure 2-Figure 12 A welding shield for a laser welding device includes a shield body 100 and a heat dissipation component 200 disposed at the upper end of the shield body 100 .

[0044] Reference Figure 2-Figure 12 , a laser welding device, comprising a welding shield and a welding system 104 disposed in a shield body 100 of the welding shield, wherein:

[0045] The protective cover body 100 is provided with an inlet and outlet 102 on each of the two sides along the length direction, and each inlet and outlet 102 is matched with a gate 101;

[0046] The welding system 104 includes a workbench 103 that can move along the length direction of the protective cover body 100. A plurality of workbenches 103 are arranged in an array along their own movement direction. The workbenches 103 can be driven through the inlet and outlet 102 to enter the protective cover body 100 or leave the protective cover body 100 through the existing technology. For example, the existing screw linear motion technology can be used to achieve this, which will not be elaborated herein. The workbench 103 is used to place the workpiece to be welded. As for the clamping of the workpiece, it can also be achieved using the existing technology, which will not be elaborated herein.

[0047] The welding system 104 can also be realized by using the existing laser welding technology, which will not be elaborated herein. The heat dissipation component 200 adopts an internal circulation heat dissipation method, that is, it pulls the air flow inside the protective cover body 100 and at the same time pulls the outside air flow. Heat exchange occurs when the two air flows, thereby achieving heat dissipation of the internal environment of the protective cover body 100. Furthermore, since the heat dissipation component 200 adopts an internal circulation method for heat dissipation, it includes two circulation ports for air intake or exhaust. Preferably, the two circulation ports are connected to the welding system 104 and move with the welding system 104. The significance of this is that during laser welding, the welding position generates the most heat. Therefore, the circulation port is moved with the welding system 104 and is always close to the welding position, thereby maximizing the heat dissipation effect.

[0048] Working process of embodiment 1:

[0049] The main body of the laser welding device includes a workbench 103, a welding system 104, and a welding protective cover. The welding system 104 is located in the protective cover body 100. A monitoring system is arranged in the protective cover body 100. A monitoring terminal and a control terminal are arranged outside the protective cover body 100. The operator can realize automatic welding by programming and adjusting the control terminal according to the actual data of the workpiece to be welded, so that the operator can control the control terminal outside the protective cover to realize laser welding inside the protective cover, thereby preventing the operator from being directly exposed to laser ultraviolet rays and causing physical injuries, thereby realizing more efficient and safer laser welding operations. In addition, the device is provided with multiple workbenches 103, and each workbench 103 can orderly transport the workpiece to be welded into the protective cover body 100 for welding processing, thereby realizing the purpose of multi-station processing, thereby realizing more efficient and safer laser welding operations.

[0050] Embodiment 2

[0051] Reference Figure 3 and Figure 4, the two circulation ports of the heat dissipation component 200 can move together with the welding end of the welding system 104. Furthermore, the circulation port includes a fixed tube 201 connected to the welding end of the welding system 104, and a plug 203 is inserted at the tube mouth of the fixed tube 201. The plug 203 is connected to the heat dissipation component of the heat dissipation component 200, and the plug 203 and the fixed tube 201 form a sealed sliding guide fit. It should be noted that in the present application, the welding end of the welding system 104 moves in the vertical direction and the plane coordinate system composed of the width direction of the protective cover body 100. Therefore, through the sliding fit between the plug 203 and the fixed tube 201, the purpose of the circulation port moving together with the welding end of the welding system 104 can be achieved. In the prior art, some welding technologies use four-axis or five-axis, so the fixed tube 201 of the circulation port and the heat dissipation component need to be connected by a hose, such as a bellows. This is easy for technicians in this field to think of and will not be elaborated.

[0052] Preferably, refer to Figure 6 A wind guide shell 202 is arranged at the bottom of the fixed tube 201, and the opening of the wind guide shell 202 faces the welding end of the welding system 104. A plurality of wind guide plates 2021 are arranged in an array along the vertical direction in the wind guide shell 202. The wind guide plates 2021 include a horizontal plate perpendicular to the plane where the opening of the wind guide shell 202 is located and an inclined plate arranged on the side of the horizontal plate away from the opening of the wind guide shell 202. The lowest point of the inclined plate is connected to the horizontal plate. The significance of this is that, in this way, the area of ​​the air inlet and outlet circulation port can be expanded, so that the air near the welding end can be drawn away as much as possible, and then return after heat dissipation, and can be dispersed more quickly in the protective cover body 100 when returning.

[0053] Reference Figure 5 A fixing convex sleeve 106 extends from the upper end of the protective cover body 100 , an outer hole 107 is provided on the outer circumferential surface of the fixing convex sleeve 106 , and an outer bottom hole 108 located in the fixing convex sleeve 106 is provided at the upper end of the protective cover body 100 .

[0054] Reference Figure 7-Figure 12 The heat dissipation assembly includes a lower cover shell 208 and an upper cover shell 209, wherein the upper end of the upper cover shell 209 is closed and the lower end is open, the lower end of the lower cover shell 208 is closed and the upper end is open, and the lower opening of the upper cover shell 209 is coaxially connected to the upper opening of the lower cover shell 208.

[0055] An upper spacer sleeve 2091 is installed in the upper cover shell 209 through an upper bracket, a connecting cover 2041 is coaxially arranged on the upper opening of the upper spacer sleeve 2091, an upper end of the connecting cover 2041 is connected to an internal circulation air pipe 204, an upper fan 214 is arranged in the upper spacer sleeve 2091, and a lower opening of the upper spacer sleeve 2091 is blocked by the upper bracket. In addition, an exhaust hole is opened on the outer circumferential surface of the upper cover shell 209, and an exhaust pipe 207 is connected to the opening of the exhaust hole.

[0056] A lower spacer 2081 is installed in the lower cover shell 208 through a lower bracket, the upper opening of the lower spacer 2081 is blocked by the upper bracket, and the lower opening is blocked by the lower bracket. A motor 212 is installed in the lower spacer 2081, and the upper bracket is provided with a connecting hole for connecting the upper spacer 2091 with the lower spacer 2081. A notch 2082 is provided on the outer circumferential surface of the lower spacer 2081.

[0057] A lower fan 213 is provided in the lower cover shell 208 and is located below the lower spacer 2081. Both ends of the output shaft of the second motor 212 are respectively connected to the upper fan 214 and the lower fan 213. The upper fan 214 and the lower fan 213 can be driven to operate at the same time by the second motor 212. The size and shape of the upper fan 214 and the lower fan 213 are consistent, so the wind force generated by the operation of the two is also the same.

[0058] Reference Figure 8 and Figure 10-12 A heat exchange unit 215 is installed between the lower spacer 2081 and the lower cover shell 208. Specifically, the heat exchange unit 215 includes a heat exchange ring 2151 coaxially located at the outer periphery of the lower spacer 2081. The upper and lower openings of the heat exchange ring 2151 are respectively blocked by the upper bracket and the lower bracket. An installation hole is opened on the outer wall of the heat exchange ring 2151. The orifice of the installation hole is connected to a side pipe 2152. The end of the side pipe 2152 extends out of the lower cover shell 208.

[0059] A plurality of external fins 2053 are arranged in an array between the outer wall of the heat exchange ring 2151 and the wall of the lower cover shell 208 .

[0060] A plurality of inner fins 2054 are arranged in an array between the inner wall of the heat exchange ring 2151 and the outer wall of the lower spacer 2081. Further, the inner fins 2054 are in a circular ring shape and are arranged in an array along the axis direction of the heat exchange ring 2151. The upper surface of the inner fin 2054 is provided with folds 2055, and fold grooves are formed correspondingly on the lower surface of the inner fin 2054. A plurality of folds 2055 are arranged in an array along the circumferential direction of the inner fin 2054. The folds 2055 on two adjacent inner fins 2054 are arranged in a staggered manner. Therefore, Fig.12 As shown, the area between two adjacent inner fins 2054 includes two types, namely a narrow area 2056 and a wide area 2057 , both of which are formed in a plurality of corresponding arrays along the circumferential direction of the inner fins 2054 and are arranged in a staggered manner.

[0061] Reference Figure 4 The end of the inner circulation air pipe 1 204 is connected to a circulation port, the end of the side pipe 2152 is connected to the inner circulation air pipe 2 205, and the end of the inner circulation air pipe 205 is connected to another circulation port through a filter unit 206. The filter unit 206 can be realized by using existing filtering technology and will not be described in detail.

[0062] Reference Figure 5 , Figure 7 , Figure 8 and Fig.10 An air inlet hole 2083 is provided at the lower closed end of the lower cover shell 208 .

[0063] A rotating sleeve 210 is coaxially provided in the fixed convex sleeve 106. The lower end of the rotating sleeve 210 is closed, the upper end is open, and it is rotatably connected with the lower closed end of the lower cover shell 208. A motor 211 is provided in the protective cover body 100, which is dynamically connected with the rotating sleeve 210 and is used to drive the rotating sleeve 210 to rotate.

[0064] An inner hole 2101 is formed on the outer circumferential surface of the rotating sleeve 210 . During the rotation of the rotating sleeve 210 , the inner hole 2101 can be connected to the outer hole 107 or blocked by the inner wall of the fixed convex sleeve 106 .

[0065] An inner bottom hole 2102 is formed at the lower closed end of the rotating sleeve 210 . During the rotation of the rotating sleeve 210 , the inner bottom hole 2102 can be connected to the outer bottom hole 108 or blocked by the upper surface of the protective cover body 100 .

[0066] The motor 211 can drive the inner hole 2101 to communicate with the outer hole 107 and the inner bottom hole 2102 to be blocked, or drive the inner bottom hole 2102 to communicate with the outer bottom hole 108 and the inner hole 2101 to be blocked.

[0067] Reference Figure 3 A bottom plate 105 is provided at the bottom of the protective cover body 100, and the interior of the bottom plate 105 is hollow. One side of the bottom plate 105 is connected to the vent provided on the inner wall of the protective cover body 100 and a plurality of side vents are provided in an array on this side of the bottom plate 105. A plurality of upper vents are provided on the upper end surface of the bottom plate 105. It should be noted that the upper vents are distributed according to the specific distribution of components inside the protective cover body 100. A part of the upper vents are evenly distributed on the bottom plate 105, and another part of the upper vents are distributed below the blind spots of the components. The benefits will be elaborated in detail later.

[0068] Working principle of the second embodiment:

[0069] A large amount of heat is inevitably generated during laser welding. Therefore, in the present application, the heat dissipation component 200 is used to dissipate heat from the internal environment of the protective cover body 100. Specifically:

[0070] Most of the heat generated by welding comes from the laser welding position, so the operation of the motor 212 drives the upper fan 214 and the lower fan 213 to operate together, wherein:

[0071] The operation of the lower fan 213 draws the outside air into the lower cover 208 and the upper cover 209 through the outer hole 107, the inner hole 2101, and the air inlet 2083, and then is discharged through the exhaust pipe 207, so that the outside air forms a flowing airflow in the lower cover 208 and the upper cover 209, which serves as a heat dissipation medium and is named as the external airflow;

[0072] The operation of the upper fan 214 will draw the air around the welding position through a circulation port, the second internal circulation air pipe 205, and the side pipe 2152 into the area between the heat exchange ring 2151 and the lower spacer 2081, and then enter the lower spacer 2081 through the notch 2082, and then enter the upper spacer 2091 through the connecting hole, and then return to the protective cover body 100 through the connecting cover 2041, the first internal circulation air pipe 204, and another circulation port, so that the air in the protective cover body 100 forms an internal circulation and takes away the heat generated by welding;

[0073] The air of the protective cover body 100 circulating internally will exchange heat with the external airflow in the lower cover shell 208 and the upper cover shell 209, thereby achieving the purpose of heat dissipation.

[0074] From the above description, we can see that:

[0075] When the internal circulating air of the protective cover body 100 flows in the heat exchange unit 215, since the side pipe 2152 and the notch 2082 are respectively located on both sides of the lower spacer 2081, the air needs to flow along the area between the heat exchange ring 2151 and the lower spacer 2081 before entering the lower spacer 2081. In this process:

[0076] a. Since the heat exchange ring 2151 and the lower spacer 2081 are both in the shape of a ring, the air flow trajectory is circular. Under the action of centrifugal force, the air will approach the inner wall of the heat exchange ring 2151, thereby more efficiently and quickly transferring heat to the outer fins 2053. At the same time, the flow of the external airflow will take away the heat of the outer fins 2053, so the heat dissipation effect is better;

[0077] b. When the air flows toward the inner wall of the heat exchange ring 2151, Fig.12 As shown, the air will pass through the narrow area 2056 and the wide area 2057. After entering the wide area 2057, the speed of the air will slow down, and after entering the narrow area 2056, the speed will speed up. Therefore, the air will collide at the connection between the wide area 2057 and the narrow area 2056. Preferably, as Fig.11As shown, the folds 2055 can be arranged in an arc shape, so that the air needs to pass through multiple narrow areas 2056 and wide areas 2057 before it can approach the inner wall of the heat exchange ring 2151, that is, it will approach the inner wall of the heat exchange ring 2151 after experiencing multiple collisions, and then when flowing toward the gap 2082, it will experience multiple collisions before entering the lower spacer 2081, and the collision is equivalent to stirring the air, which can make each part of the air contact with the heat exchange ring 2151, thereby improving the effect of transferring heat to the outer fins 2053;

[0078] c. In the present application, the upper fan 214 and the lower fan 213 are driven by the motor 212 to operate together. Since the upper fan 214 and the lower fan 213 are consistent in size and shape, the wind force generated by the operation of the two is also the same. In addition, since the air collides during the flow in the heat exchange unit 215, the flow rate will be slowed down. Therefore, the flow rate of the external air flow will be significantly greater than the flow rate of the internal circulation air. In this way, on the one hand, the internal circulation air has enough time to transfer the heat to the heat exchange unit 215, and the external air flow can quickly take away the heat of the heat exchange unit 215. The cooperation of the two can improve the heat dissipation effect.

[0079] The above process is to dissipate heat in the protective cover body 100. After welding, the rotating sleeve 210 can be driven to rotate by the motor 211, so that the inner hole 2101 is blocked and the inner bottom hole 2102 is connected to the outer bottom hole 108. Thereafter, the above heat dissipation process is repeated. At this time, the outside air can enter the bottom plate 105 through the side vents, and enter the protective cover body 100 through the upper vents, and then be discharged through the outer bottom hole 108, the inner bottom hole 2102, the lower cover shell 208, the upper cover shell 209 and the exhaust pipe 207. In this process, the outside air flows from bottom to top in the protective cover body 100, which can take away impurities in the protective cover body 100, such as dust, welding slag, etc., and clean the protective cover body 100. Since the distribution of the upper vents of the bottom plate 105 depends on the specific actual situation, the dead corners can be effectively cleaned.

[0080] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A laser welding device, comprising a welding shield and a welding system (104), characterized in that: The welding shield comprises a shield body (100) and a heat dissipation component (200) arranged at the upper end of the shield body (100); the welding system (104) is arranged in the shield body (100); The protective cover body (100) is provided with an inlet and outlet (102) on each of two side surfaces along the length direction, and a gate (101) is matched and installed at each inlet and outlet (102); the welding system (104) comprises a workbench (103) capable of moving along the length direction of the protective cover body (100); a plurality of workbench (103) are arranged in an array along the direction of their own movement; the workbench (103) is used to place a workpiece to be welded; the welding system (104) is used to realize laser welding of the workpiece; and the heat dissipation component (200) is used to perform heat dissipation and temperature reduction treatment on the internal environment of the protective cover body (100); The heat dissipation component (200) comprises two circulation ports and a heat dissipation component located between the two circulation ports, the two circulation ports are capable of moving with the welding system (104), and the circulation ports and the heat dissipation component are connected via a hose; The heat dissipation assembly comprises a lower cover shell (208) and an upper cover shell (209); the upper end of the upper cover shell (209) is closed and the lower end is open; the lower end of the lower cover shell (208) is closed and the upper end is open; the lower opening of the upper cover shell (209) is coaxially connected to the upper opening of the lower cover shell (208); An upper spacer (2091) is installed in the upper cover shell (209) via an upper bracket, a connecting cover (2041) is coaxially arranged at the upper opening of the upper spacer shell (2091), an internal circulation air pipe (204) is connected to the upper end of the connecting cover (2041), an upper fan (214) is arranged in the upper spacer shell (2091), a lower opening of the upper spacer shell (2091) is blocked by the upper bracket, and an exhaust hole is opened on the outer circumferential surface of the upper cover shell (209); A lower spacer (2081) is installed in the lower cover shell (208) through a lower bracket, an upper opening of the lower spacer (2081) is blocked by the upper bracket, and a lower opening is blocked by the lower bracket, a second motor (212) is installed in the lower spacer (2081), the upper bracket is provided with a connecting hole for achieving communication between the upper spacer (2091) and the lower spacer (2081), and a notch (2082) is provided on the outer circumferential surface of the lower spacer (2081); A lower fan (213) located below the lower spacer (2081) is disposed in the lower casing (208); two ends of the output shaft of the second motor (212) are respectively connected to the upper fan (214) and the lower fan (213) by power; and an air inlet (2083) is provided at the lower closed end of the lower casing (208); A heat exchange unit (215) is installed between the lower spacer (2081) and the lower cover shell (208), and the heat exchange unit (215) comprises a heat exchange ring (2151) coaxially located on the periphery of the lower spacer (2081), the upper and lower openings of the heat exchange ring (2151) are blocked by an upper bracket and a lower bracket respectively, an installation hole is opened on the outer wall of the heat exchange ring (2151), and the opening of the installation hole is connected to a side pipe (2152), a plurality of outer fins (2053) are arranged in an array between the outer wall of the heat exchange ring (2151) and the shell wall of the lower cover shell (208), and a plurality of inner fins (2054) are arranged in an array between the inner wall of the heat exchange ring (2151) and the outer wall of the lower spacer (2081); The inner fins (2054) are in a circular ring shape and are arranged in an array along the axis direction of the heat exchange ring (2151); folds (2055) are arranged on the upper surface of the inner fins (2054); and fold grooves are formed correspondingly on the lower surface of the inner fins (2054); a plurality of folds (2055) are arranged in an array along the circumferential direction of the inner fins (2054); and the folds (2055) on two adjacent inner fins (2054) are arranged in a staggered manner; The folds (2055) are arranged in an arc shape.

2. A laser welding device according to claim 1, characterized in that: The circulation port comprises a fixed tube (201) connected to a welding end of a welding system (104), the fixed tube (201) being connected to a heat dissipation component, an air guide shell (202) being arranged at the bottom of the fixed tube (201), the opening of the air guide shell (202) facing the welding end of the welding system (104), a plurality of air guide plates (2021) being arranged in an array along a vertical direction in the air guide shell (202), the air guide plates (2021) comprising a horizontal plate perpendicular to a plane where the opening of the air guide shell (202) is located, and an inclined plate arranged on a side of the horizontal plate away from the opening of the air guide shell (202), the lowest point of the inclined plate being connected to the horizontal plate.

3. A laser welding device according to claim 1, characterized in that: The upper fan (214) and the lower fan (213) have the same size and shape.

4. A laser welding device according to claim 1, characterized in that: The end of the inner circulation air pipe 1 (204) is connected to a circulation port, the end of the side pipe (2152) extends out of the lower cover (208) and is connected to the inner circulation air pipe 2 (205), and the end of the inner circulation air pipe 2 (205) is connected to another circulation port.

5. The laser welding device according to claim 1, characterized in that: A fixing convex sleeve (106) extends from the upper end of the protective cover body (100); an outer hole (107) is provided on the outer circumferential surface of the fixing convex sleeve (106); and an outer bottom hole (108) located inside the fixing convex sleeve (106) is provided at the upper end of the protective cover body (100); A rotating sleeve (210) is coaxially sleeved in the fixed convex sleeve (106); the rotating sleeve (210) is closed at the lower end and open at the upper end, and is rotatably connected to the lower closed end of the lower cover shell (208); a motor (211) for driving the rotating sleeve (210) to rotate is arranged in the protective cover body (100); an inner hole (2101) is provided on the outer circumferential surface of the rotating sleeve (210); during the rotation of the rotating sleeve (210), the inner hole (2101) can communicate with the outer hole (107) or the inner hole (2101) is blocked by the inner wall of the fixed convex sleeve (106); an inner bottom hole (2102) is provided on the lower closed end of the rotating sleeve (210); during the rotation of the rotating sleeve (210), the inner bottom hole (2102) can communicate with the outer bottom hole (108) or the inner bottom hole (2102) is blocked by the upper surface of the protective cover body (100); A bottom plate (105) is provided at the bottom of the protective cover body (100); the interior of the bottom plate (105) is hollow; one side of the bottom plate (105) is connected to a vent provided on the inner wall of the protective cover body (100); a plurality of side vent holes are provided in an array on the side of the bottom plate (105); and a plurality of upper vent holes are provided on the upper end surface of the bottom plate (105).

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