A laser welding apparatus

Abstract

The application relates to a laser welding device and belongs to the technical field of fin laser processing, which comprises a welding machine table, a cross beam and a welding head. The cross beam is slidably arranged on the welding machine table, and the welding head is slidably arranged on the cross beam and slides along the length direction of the cross beam and in a direction perpendicular to the welding machine table. A first mounting ring is arranged on the welding head, a plurality of shielding plates are arranged on the first mounting ring, and the shielding plates are arranged in a circumferential direction of the outer ring of the first mounting ring and surround the welding head. The shielding plates are slidably arranged on the first mounting ring, the bottom of the shielding plate is supported on the fin when the welding head welds the fin, the shielding plate is slidably arranged on the first mounting ring, the bottom of the shielding plate is supported on the fin when the welding head welds the fin, a preheating piece is arranged on the shielding plate, the preheating piece is used for absorbing heat generated in a welding process and storing the heat, and the heat is transmitted to the next fin to be processed. The application has the effect of improving the welding safety of the fin.

Description

Technical Field

[0001] This application relates to the field of laser processing technology for heat sinks, and in particular to a laser welding device. Background Technology

[0002] Laser welding is a precision welding method that uses a high-energy-density laser beam as a heat source to locally heat materials to a molten or vaporized state, forming a strong bond upon cooling. When the laser power density is high enough, the material surface not only melts but also rapidly vaporizes, and the vapor pressure creates a deep hole in the molten pool. The laser beam passes through a keyhole directly to the bottom of the hole, and the energy is deeply absorbed by the material. As the laser head or workpiece moves, the metal at the leading edge of the keyhole continuously melts, while the metal along the trailing edge cools and solidifies, forming a weld with a large depth-to-width ratio and minimal deformation.

[0003] However, the raw material for heat sinks is usually copper, which is widely used in the heat dissipation industry because of its high thermal conductivity. However, at room temperature, copper has a reflectivity of more than 90% for commonly used near-infrared lasers (such as fiber lasers and YAG lasers with a wavelength of 1064nm). This results in a large amount of visible and invisible light from the laser being reflected during the heat sink welding process, which has a significant impact on the processing personnel. Summary of the Invention

[0004] To improve the safety of heat sink welding, this application provides a laser welding device.

[0005] The laser welding equipment provided in this application adopts the following technical solution:

[0006] A laser welding device includes a welding platform, a crossbeam, and a welding head. The crossbeam is slidably mounted on the welding platform, and the welding head is slidably mounted on the crossbeam. The welding head slides along the length of the crossbeam and along a direction perpendicular to the welding platform. A first mounting ring is provided on the welding head, and a plurality of baffles are provided on the first mounting ring. The baffles are elongated and have an arc-shaped cross-section. The baffles are arranged circumferentially around the welding head along the outer ring of the first mounting ring.

[0007] The shield is slidably mounted on the first mounting ring, and the sliding direction of the shield is parallel to the axis of the first mounting ring. When the welding head welds to the heat sink, the bottom of the shield rests on the heat sink.

[0008] The welding head is equipped with a fixing device, which is used to lift all the baffles and separate them from the heat sink after the heat sink is welded.

[0009] The shielding plate is equipped with a preheating component, which is used to absorb and store the heat generated during the welding process, and then transfer the heat to the next heat sink to be processed.

[0010] Optionally, the fixing device includes a second mounting ring disposed on the welding head. The second mounting ring is located above the first mounting ring and has a larger diameter than the first mounting ring. A fixing groove is formed at the bottom of the second mounting ring. The fixing groove is annular. The second mounting ring is slidably disposed on the welding head. The second mounting ring slides toward the baffle plate and houses the end of the baffle plate in the fixing groove. The fixing device also includes a first fixing member and a first driving member. The first fixing member is used to fix the baffle plate in the second mounting ring after the end of the baffle plate enters the fixing groove. The first driving member is used to drive the baffle plate to slide and separate from the heat sink after the baffle plate is fixed in the second mounting ring.

[0011] Optionally, the first fixing member includes a first airbag, and the side walls on both sides of the fixing groove are provided with mounting grooves. The first airbag is disposed in the mounting groove and has an expansion tendency toward the fixing groove. The first fixing member also includes an air pump disposed on a second mounting ring, and the air pump is connected to the first airbag.

[0012] Optionally, the first driving component includes a drive motor and a drive screw. The side wall of the welding head is recessed and formed with a sliding groove. The inner ring of the second mounting ring is provided with a slider. The slider is slidably mounted on the welding head through the sliding groove. The drive motor and the drive screw are both located in the sliding groove. The slider is threadedly connected to the drive screw. The drive screw is coaxially mounted on the output shaft of the drive motor.

[0013] Optionally, the baffle plate has a cavity and an installation notch communicating with the cavity on its inner wall. The preheating component includes heat-absorbing powder disposed in the cavity and a transparent plate disposed in the installation notch. The heat reflected by the welding heat sink of the welding head is transferred to the heat-absorbing powder through the transparent plate, thereby raising the temperature of the heat-absorbing powder and thus raising the temperature of the baffle plate. The component also includes a stirring component, which is used to stir the heat-absorbing powder so that the heat-absorbing powder is in a dynamic process and exchanges heat with the welding heat.

[0014] Optionally, the first mounting ring is rotatably mounted on the welding head, with the rotation axis of the first mounting ring coaxial with the welding head. The outer wall of the welding head is uniformly provided with multiple drive wheels, and the peripheral wall of each drive wheel is concavely formed with a suspension groove. The inner ring of the first mounting ring is hooked into the suspension groove. The welding head is provided with a first motor, and any one of the drive wheels is mounted on the output shaft of the first motor. The first motor drives the first mounting ring to rotate, and the rotation of the first mounting ring causes the baffle plate to rotate, so that the heat-absorbing powder is distributed on the outside of the cavity under the action of centrifugal force, thereby increasing the heat transfer area between the heat-absorbing powder and heat.

[0015] Optionally, the agitator includes an air inlet on the baffle plate, the air inlet facing the welding head and close to the bottom of the baffle plate, and an air outlet on the baffle plate. When the welding head welds the heat sink, the protective gas introduced enters the cavity through the air inlet and is discharged through the air outlet, thereby causing the heat-absorbing powder to move irregularly in the cavity.

[0016] Optionally, the baffle plate is provided with a first channel, one end of which is connected to the air inlet and the other end of which is connected to the bottom of the cavity. Multiple inclined plates are provided in the end of the first channel near the cavity, and the inclined plates and the inner side of the first channel form a receiving notch for accommodating heat-absorbing powder.

[0017] Optionally, a second channel is provided inside the baffle plate. One end of the second channel is connected to the vent, and the other end penetrates the outer wall of the baffle plate. The vent is opened on the inner wall of the cavity facing the welding head.

[0018] Optionally, a windshield is provided on the inner side of the shield, the windshield is fitted with an air inlet and the windshield has an air inlet notch on its windward side.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] During heat sink welding, the heat sink is fixed on the welding machine table. Then, the crossbeam moves on the welding machine table, and the welding head moves horizontally and vertically on the crossbeam to position the welding head directly above the heat sink. Then, the welding head is opened to weld the heat sink. During this process, multiple baffles fall on the heat sink and surround the welding point of the heat sink under the action of gravity. The highly reflective laser generated during the welding process is blocked by the baffles, which reduces the impact of reflected laser on the operator and improves the welding safety of the heat sink.

[0021] Multiple shielding plates are arranged circumferentially around the first mounting ring, which improves the surrounding effect of the welding point and enhances the shielding performance against reflected lasers, thereby further improving the welding safety of the heat sink. In addition, compared to adding a protective cover to the welding head, when the protective cover is lifted due to the weld or uneven surface, the entire protective cover is lifted, resulting in a decrease in the light-shielding performance of the protective cover.

[0022] Because copper has high thermal conductivity, when a laser beam irradiates the weld, the heat at the weld is quickly transferred to other areas, resulting in a decrease in the welding quality and efficiency of the heat sink. However, with the help of a preheating component, the next heat sink to be welded is preheated, reducing the temperature difference between the weld and the surrounding area, thus slowing down the heat transfer rate. This makes it easier for the laser beam to weld the weld, thereby improving the welding efficiency and effect of the heat sink. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a laser welding device according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a welding head in a laser welding device according to an embodiment of this application;

[0025] Figure 3 This is an enlarged schematic diagram of the welding head in a laser welding device according to an embodiment of this application;

[0026] Figure 4 This is a cross-sectional view of a welding head in a laser welding device according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of a shielding plate in a laser welding device according to an embodiment of this application;

[0028] Figure 6 yes Figure 4 An enlarged schematic diagram of part A in the middle;

[0029] Figure 7 yes Figure 4 Enlarged diagram of part B.

[0030] Explanation of reference numerals in the attached drawings: 1. Welding machine base; 2. Crossbeam; 3. Welding head; 4. First mounting ring; 5. Baffle plate;

[0031] 6. Fixing device; 61. Second mounting ring; 62. Fixing groove; 63. First airbag; 64. Mounting groove; 65. Air pump; 66. Drive motor; 67. Drive screw;

[0032] 7. Preheating component; 71. Transparent plate; 72. Air inlet; 73. First channel; 74. Inclined plate;

[0033] 8. Slide groove; 9. Slider; 10. Cavity; 11. Mounting notch; 12. Drive wheel; 13. First motor; 14. Second channel; 15. Air outlet; 16. Wind shield; 17. Air inlet notch. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail.

[0035] This application discloses a laser welding device. (Refer to...) Figure 1 , Figure 2 and Figure 3The laser welding equipment includes a welding platform 1, a crossbeam 2, and a welding head 3. The crossbeam 2 is slidably mounted on the welding platform 1, and the welding head 3 is slidably mounted on the crossbeam 2. The welding head 3 slides along the length of the crossbeam 2 and along a direction perpendicular to the welding platform 1. A first mounting ring 4 is provided on the welding head 3, and multiple baffle plates 5 are provided on the first mounting ring 4. The baffle plates 5 are elongated and have an arc-shaped cross-section. The baffle plates 5 are arranged circumferentially around the welding head 3 along the outer ring of the first mounting ring 4.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The shield 5 is slidably mounted on the first mounting ring 4. The sliding direction of the shield 5 is parallel to the axis of the first mounting ring 4. When the welding head 3 welds to the heat sink, the bottom of the shield 5 is supported on the heat sink.

[0037] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment of the application, a fixing device 6 is provided on the welding head 3. The fixing device 6 is used to lift all the shielding plates 5 and separate them from the heat sink after the heat sink is welded.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The baffle plate 5 is equipped with a preheating element 7, which is used to absorb and store the heat generated during the welding process, and then transfer the heat to the next heat sink to be processed.

[0039] During heat sink welding, the heat sink is fixed on the welding machine 1. Then, the crossbeam 2 moves on the welding machine 1, and the welding head 3 moves laterally and vertically on the crossbeam 2 until it is positioned directly above the heat sink. The welding head 3 is then activated to weld the heat sink. During this process, multiple baffles 5, under the influence of gravity, fall onto the heat sink and surround the welding points. The highly reflective laser generated during welding is blocked by the baffles 5, reducing the impact of reflected laser on the operator and improving the welding safety of the heat sink. After the heat sink welding is completed, the fixing device 6 moves all the baffles 5 upwards to separate them from the heat sink, facilitating heat sink removal and installation. Furthermore, the preheating component 7 preheats the next heat sink to be welded, slowing down the heat transfer efficiency during the welding process and improving the welding efficiency and quality of the heat sink.

[0040] Reference Figure 4In this embodiment of the application, the fixing device 6 includes a second mounting ring 61 disposed on the welding head 3. The second mounting ring 61 is coaxial with the first mounting ring 4. The second mounting ring 61 is located above the first mounting ring 4 and has a diameter larger than the first mounting ring 4. A fixing groove 62 is provided at the bottom of the second mounting ring 61. The fixing groove 62 is annular. The second mounting ring 61 is slidably disposed on the welding head 3. The second mounting ring 61 slides toward the baffle plate 5 and houses the end of the baffle plate 5 in the fixing groove 62.

[0041] Reference Figure 4 The fixing device 6 also includes a first fixing member and a first driving member. The first fixing member is used to fix the shielding plate 5 in the second mounting ring 61 after the end of the shielding plate 5 enters the fixing groove 62. The first driving member is used to drive the shielding plate 5 to slide and separate from the heat sink after the shielding plate 5 is fixed in the second mounting ring 61.

[0042] After the heat sink is soldered, the first driving component drives the second mounting ring 61 to slide along the laser head so that the end of the shield 5 enters the fixing groove 62. Then, the first fixing component fixes the shield 5 on the second mounting ring 61. The first driving component then drives the second mounting ring 61 to slide vertically, thereby causing the shield 5 to slide.

[0043] Reference Figure 4 In this embodiment, the first fixing member includes a first airbag 63, which is annular and has two sections. Mounting grooves 64 are provided on the sidewalls of both sides of the fixing groove 62. The first airbag 63 is disposed within the mounting grooves 64 and has an expanding tendency towards the fixing groove 62. The first fixing member also includes an air pump 65 disposed on a second mounting ring 61, which communicates with the first airbag 63. When the baffle plate 5 enters the fixing groove 62, the air pump 65 is activated, pressurizing air into the first airbag 63. The first airbag 63 is filled with gas and expands towards the fixing groove 62, clamping the baffle plate 5 within it, thereby fixing the baffle plate 5 onto the second mounting ring 61. The operation is simple and convenient. Furthermore, the air pump 65 discharges the gas from the first airbag 63, facilitating the rapid and complete detachment of the first airbag 63 and the baffle plate 5, and allowing the baffle plate 5 to enclose the welded joint 3.

[0044] Reference Figure 4In this embodiment, the first driving component includes a drive motor 66 and a drive screw 67. A groove 8 is recessed into the side wall of the welding head 3. The groove 8 is elongated and its length direction is parallel to the length direction of the welding head 3. A slider 9 is provided on the inner ring of the second mounting ring 61. The slider 9 is slidably mounted on the welding head 3 via the groove 8. Both the drive motor 66 and the drive screw 67 are located within the groove 8. The slider 9 is threadedly connected to the drive screw 67, which is coaxially mounted on the output shaft of the drive motor 66. After the baffle plate 5 is fixed within the second mounting ring 61, the drive motor 66 is started. The drive motor 66 drives the drive screw 67 to rotate. The rotation of the drive screw 67 causes the slider 9 to slide within the groove 8, which in turn moves the second mounting ring 61 on the welding head 3, causing the baffle plate 5 to move vertically. The operation is simple and convenient.

[0045] Reference Figure 4 and Figure 5 In this embodiment, the baffle plate 5 has a cavity 10 and an installation notch 11 communicating with the cavity 10 on its inner wall. The cavity 10 is fan-shaped, similar in shape to the baffle plate 5. The preheating component 7 includes heat-absorbing powder disposed in the cavity 10 and a transparent plate 71 disposed in the installation notch 11. The heat-absorbing powder is diamond powder, boron nitride powder, graphite powder, and alumina powder, etc. The heat reflected from the welding head 3 welding the heat sink is transferred to the heat-absorbing powder through the transparent plate 71, causing the temperature of the heat-absorbing powder to rise, which in turn raises the temperature of the baffle plate 5. After the baffle plate 5 is completely lowered onto the heat sink, The laser emitted from welding head 3 irradiates the heat sink. Part of the laser is reflected towards the inside of the shielding plate 5 and irradiates the inside of the shielding plate 5. During this process, the reflected laser passes through the transparent plate 71 and irradiates the heat-absorbing powder, causing the temperature of the heat-absorbing powder to rise and storing the heat in the heat-absorbing powder. When the next heat sink is processed, the shielding plate 5 falls onto the heat sink. The heat of the heat-absorbing powder is transferred to the heat sink through the shielding plate 5, causing the temperature of the contact part between the heat sink and the shielding plate 5 to rise, thus slowing down the heat transfer between the welding point and the surrounding area. This facilitates a large temperature rise rate at the welding point and makes the welding operation of the heat sink easier.

[0046] Reference Figure 4 and Figure 5Because the heat-absorbing powder is in powder form, it accumulates within the cavity 10, resulting in poor contact area between the powder and the laser. Therefore, in this embodiment, the first mounting ring 4 is rotatably mounted on the welding head 3, with its rotation axis coaxial with the welding head 3. Multiple drive wheels 12 are evenly distributed on the outer wall of the welding head 3, with both their axial and rotational directions parallel to the axis of the welding head 3. A suspension groove is formed within the peripheral wall of each drive wheel 12, and the inner ring of the first mounting ring 4 is attached to this groove. A first motor 13 is mounted on the welding head 3, with any one drive wheel 12 mounted on the output shaft of the first motor 13. The first motor 13 drives the first mounting ring 4 to rotate, which in turn causes the baffle plate 5 to rotate, distributing the heat-absorbing powder outside the cavity 10 under centrifugal force, thus increasing the heat transfer area. Furthermore, under centrifugal force, the heat-absorbing powder is laid on the outer wall of the cavity 10, facilitating laser irradiation of the powder.

[0047] Reference Figure 4 , Figure 5 and Figure 6 When the first mounting ring 4 rotates, causing the baffle plate 5 to rotate at high speed, under the action of centrifugal force, the heat-absorbing powder is laid on the outer wall of the cavity 10. Although this increases the contact area between the heat-absorbing powder and the laser, the heat-absorbing powder pressed below cannot obtain a good irradiation effect, resulting in a slow temperature rise of the heat-absorbing powder. Therefore, in this embodiment, a stirring element is also included. The stirring element is used to stir the heat-absorbing powder so that the heat-absorbing powder is in a dynamic process and exchanges heat with the welding heat. The stirring element includes an air inlet 72 opened on the baffle plate 5, and the air inlet 72 faces... The air inlet 72 of the welding head 3 is close to the bottom of the baffle plate 5. The baffle plate 5 has an air outlet 15. When the welding head 3 welds the heat sink, the protective gas is introduced into the cavity 10 through the air inlet 72 and then discharged through the air outlet 15, which causes the heat-absorbing powder to move irregularly in the cavity 10. Under the action of centrifugal force, the heat-absorbing coating laid on the outside of the cavity 10 is in a dynamic state, which makes it easier for the heat-absorbing coating below to be irradiated by the laser, so that the temperature of the heat-absorbing powder rises faster and higher, which is convenient for heating the next heat sink.

[0048] Reference Figure 4 , Figure 5 and Figure 6In this embodiment, a first channel 73 is provided inside the baffle plate 5. One end of the first channel 73 is connected to the air inlet 72, and the other end is connected to the bottom of the cavity 10. Multiple inclined plates 74 are provided inside the end of the first channel 73 near the cavity 10. The inclined plates 74 and the inner side of the first channel 73 form a receiving notch for accommodating heat-absorbing powder. Furthermore, the inclined plates 74 are located on two opposite sidewalls of the first channel 73, and the inclined plates 74 are positioned between adjacent inclined plates 74. The protective gas during the welding process enters the first channel 73 through the air inlet 72 and flows along the first channel 73 from... The heat-absorbing powder enters the bottom of the cavity 10 and is dispersed, causing it to move irregularly within the cavity 10. This increases the degree of disorder in the movement of the heat-absorbing powder and increases the chance of contact between the heat-absorbing powder and the laser. Under the action of the inclined plate 74, the path of the heat-absorbing powder into the first channel 73 is blocked, keeping the heat-absorbing powder within the cavity 10. As the protective gas passes through the first channel 73 and enters the shielding plate 5, the protective gas creates a negative pressure environment at the end of the inclined plate 74, drawing in the heat-absorbing powder in the containment gap and following the flow of the protective gas into the cavity 10.

[0049] Reference Figure 4 , Figure 5 and Figure 7 In this embodiment, a second channel 14 is provided inside the baffle plate 5. One end of the second channel 14 is connected to the vent 15, and the other end penetrates the outer wall of the baffle plate 5. The vent 15 is located on the inner wall of the cavity 10 facing the welding head 3. The protective gas entering the cavity 10 enters the second channel 14 through the vent 15 and is discharged. During this process, because the baffle plate 5 is rotating, most of the heat-absorbing powder is located on the outside of the cavity 10 under the action of centrifugal force, while the vent 15 is located on the inside of the cavity 10, reducing the possibility of the heat-absorbing powder being discharged through the vent 15.

[0050] Reference Figure 4 , Figure 5 and Figure 6 In this embodiment of the application, a wind shield 16 is provided on the inner side of the shield 5. The wind shield 16 is sleeved with the air inlet 72 and the wind-facing surface of the wind shield 16 is provided with an air inlet notch 17. Under the action of the wind shield 16, it is convenient for the shield 5 to capture the protective gas through the air inlet notch 17 and enter the cavity 10 during the rotation process.

[0051] The implementation principle of a laser welding device according to an embodiment of this application is as follows:

[0052] During heat sink welding, the heat sink is fixed on the welding machine 1. Then, the crossbeam 2 moves on the welding machine 1, and the welding head 3 moves laterally and vertically on the crossbeam 2 until it is positioned directly above the heat sink. The welding head 3 is then activated to weld the heat sink. During this process, multiple baffles 5, under the influence of gravity, fall onto the heat sink and surround the welding points. The highly reflective laser generated during welding is blocked by the baffles 5, reducing the impact of reflected laser on the operator and improving the welding safety of the heat sink. After the heat sink welding is completed, the fixing device 6 moves all the baffles 5 upwards to separate them from the heat sink, facilitating heat sink removal and installation. Furthermore, the preheating component 7 preheats the next heat sink to be welded, slowing down the heat transfer efficiency during the welding process and improving the welding efficiency and quality of the heat sink.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser welding device, characterized in that: The assembly includes a welding machine base (1), a crossbeam (2), and a welding head (3). The crossbeam (2) is slidably mounted on the welding machine base (1), and the welding head (3) is slidably mounted on the crossbeam (2). The welding head (3) slides along the length of the crossbeam (2) and along a direction perpendicular to the welding machine base (1). A first mounting ring (4) is provided on the welding head (3), and a plurality of baffles (5) are provided on the first mounting ring (4). The baffles (5) are elongated and have an arc-shaped cross-section. The baffles (5) are arranged circumferentially around the welding head (3) along the outer ring of the first mounting ring (4). The shield (5) is slidably disposed on the first mounting ring (4), and the sliding direction of the shield (5) is parallel to the axial direction of the first mounting ring (4). When the welding head (3) welds the heat sink, the bottom of the shield (5) is supported on the heat sink. The welding head (3) is provided with a fixing device (6), which is used to lift all the shielding plates (5) and separate them from the heat sink after the heat sink is welded. The shielding plate (5) is provided with a preheating component (7), which is used to absorb and store the heat generated during the welding process, and then transfer the heat to the next heat sink to be processed. The fixing device (6) includes a second mounting ring (61) disposed on the welding head (3). The second mounting ring (61) is located above the first mounting ring (4) and has a larger diameter than the first mounting ring (4). A fixing groove (62) is provided at the bottom of the second mounting ring (61). The fixing groove (62) is annular. The second mounting ring (61) is slidably disposed on the welding head (3). The second mounting ring (61) slides toward the shielding plate (5) and houses the end of the shielding plate (5) in the fixing groove (62). The fixing device (6) also includes a first fixing member and a first driving member. The first fixing member is used to fix the shielding plate (5) in the second mounting ring (61) after the end of the shielding plate (5) enters the fixing groove (62). The first driving member is used to drive the shielding plate (5) to slide and separate from the heat sink after the shielding plate (5) is fixed in the second mounting ring (61). The shielding plate (5) has a cavity (10) and the inner wall of the shielding plate (5) has an installation notch (11) communicating with the cavity (10). The preheating component (7) includes heat-absorbing powder disposed in the cavity (10) and a transparent plate (71) disposed in the installation notch (11). The heat reflected by the welding heat sink of the welding head (3) is transferred to the heat-absorbing powder through the transparent plate (71), which raises the temperature of the heat-absorbing powder and thus raises the temperature of the shielding plate (5). It also includes a stirring component, which is used to stir the heat-absorbing powder so that the heat-absorbing powder is in a dynamic process and exchanges heat with the welding heat. The first mounting ring (4) is rotatably disposed on the welding head (3). The rotation axis of the first mounting ring (4) is coaxial with the welding head (3). The outer wall of the welding head (3) is uniformly provided with a plurality of drive wheels (12). The peripheral wall of the drive wheel (12) is concavely formed with a suspension groove. The first mounting ring (4) The inner ring of the welding head (3) is hung in the suspension groove. The welding head (3) is equipped with a first motor (13). Any one of the driving wheels (12) is set on the output shaft of the first motor (13). The first motor (13) drives the first mounting ring (4) to rotate. The rotation of the first mounting ring (4) drives the baffle plate (5) to rotate, so that the heat-absorbing powder is distributed on the outside of the cavity (10) under the action of centrifugal force, thereby increasing the heat transfer area between the heat-absorbing powder and heat. The stirring component includes an air inlet (72) opened on the baffle plate (5). The air inlet (72) faces the welding head (3) and is close to the bottom of the baffle plate (5). The baffle plate (5) is provided with an air outlet (15). When the welding head (3) welds the heat sink, the protective gas introduced enters the cavity (10) through the air inlet (72) and is discharged through the air outlet (15), thereby driving the heat-absorbing powder to make irregular movements in the cavity (10).

2. The laser welding equipment according to claim 1, characterized in that: The first fixing member includes a first airbag (63), and the side walls on both sides of the fixing groove (62) are provided with mounting grooves (64). The first airbag (63) is disposed in the mounting groove (64). The first airbag (63) has an expansion tendency toward the fixing groove (62). The first fixing member also includes an air pump (65) disposed on the second mounting ring (61). The air pump (65) is connected to the first airbag (63).

3. The laser welding equipment according to claim 1, characterized in that: The first driving component includes a drive motor (66) and a drive screw (67). The side wall of the welding head (3) is recessed and formed with a groove (8). The inner ring of the second mounting ring (61) is provided with a slider (9). The slider (9) is slidably disposed on the welding head (3) through the groove (8). The drive motor (66) and the drive screw (67) are both located in the groove (8). The slider (9) is threadedly connected to the drive screw (67). The drive screw (67) is coaxially disposed on the output shaft of the drive motor (66).

4. The laser welding equipment according to claim 1, characterized in that: The baffle plate (5) is provided with a first channel (73), one end of the first channel (73) is connected to the air inlet (72), and the other end is connected to the bottom of the cavity (10). The end of the first channel (73) near the cavity (10) is provided with multiple inclined plates (74), and the inclined plates (74) and the inner side of the first channel (73) form a receiving notch for accommodating heat-absorbing powder.

5. The laser welding equipment according to claim 1, characterized in that: The shield (5) is provided with a second channel (14), one end of which is connected to the air outlet (15), and the other end penetrates the outer wall of the shield (5). The air outlet (15) is opened on the inner wall of the cavity (10) facing the welding head (3).

6. The laser welding equipment according to claim 1, characterized in that: The inner side of the shield (5) is provided with a wind shield (16), which is sleeved with an air inlet (72) and has an air inlet notch (17) on the windward side.

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