A finned heat sink with reinforcement beams welded to the webs of the fins and a method of welding

Abstract

A plate-type radiator with reinforcing ribs and heat sink fins welded together, and a welding method thereof. The plate-type radiator with reinforcing ribs and heat sink fins welded together comprises multiple heat sink fins, two oil collection pipes, multiple reinforcing ribs, and multiple welds. Each heat sink fin is composed of two heat sink fins welded together opposite each other. The long edge of each heat sink fin intersects with the outer diameter of the reinforcing rib, and a gap suitable for a beam-shaped weld is provided at the intersection. A weld seam is formed between the outer edge of the long edge of the heat sink fin and the outer diameter of the reinforcing rib, and the weld seam is beam-shaped. The beam-shaped weld seam is divided into three areas: a weld seam area between the weld material and the reinforcing rib, a weld seam area between the weld material and the heat sink fin, and a weld seam area connecting the two areas. The weld seam area is formed by the self-fusion of the weld material. The radiator is positioned with the oil collection pipe axis perpendicular to the horizontal plane, and the gap between the reinforcing rib and the heat sink fin is 3mm. The welding method of this invention improves the service life of the plate-type radiator while increasing welding efficiency, ensuring product corrosion resistance, and reducing manufacturing costs.

Description

Technical Field

[0001] This invention belongs to the field of processing and manufacturing of plate heat sinks for transformers, specifically relating to a plate heat sink with reinforcing ribs welded to heat sink lint beams and a welding method. Background Technology

[0002] The existing method for welding multiple heat sink fins and reinforcing ribs in transformer plate radiators involves spot welding at two or more points between the reinforcing ribs and the edges of the heat sink fins, and the number of spot welds is large. Simultaneously, welding blind spots exist at the contact points and in narrow areas, causing welding defects that are difficult to visually inspect. These welding defects lead to problems during subsequent surface anti-corrosion painting, such as paint dripping, poor coverage, pinholes, uneven surfaces, and a lack of fullness and gloss in the outer paint. After a period of time, cracking, peeling, blistering, and rusting may also occur. These defects, which are not easily detected, pose potential corrosion risks to transformer finned radiators and can easily lead to transformer oil leakage. To reduce these defects, the radiator needs to be rotated multiple times during the welding of the fins and reinforcing ribs, eliminating welding blind spots. The existing spot welding process needs to be changed to a continuous welding process, with full welding of multiple fins and reinforcing ribs. However, since the spacing between multiple fins is usually a narrow space of 45mm, it is difficult to adjust the welding gun to the optimal welding posture for full welding. Therefore, this method can only reduce the number of defects, but cannot completely eliminate them.

[0003] In summary, the existing welding methods for multiple heat sinks and reinforcing ribs in the transformer finned radiator industry, namely spot welding and continuous welding, result in a high defect rate when using spot welding, which affects the quality of subsequent corrosion protection and makes the radiator prone to leakage, while also significantly increasing the repair rate. Although continuous welding reduces welding defects, it is both labor-intensive and time-consuming, greatly reducing work efficiency and increasing the cost of welding materials. The welding defects that do occur will reduce the corrosion protection quality of the transformer finned radiator and shorten its service life. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention provides a plate-type radiator with reinforcing ribs welded to heat sink fins and a welding method thereof, the purpose of which is to manufacture a plate-type radiator with high efficiency, high quality, low material consumption and low repair rate with reinforcing ribs welded to heat sink fins.

[0006] (II) Technical Solution

[0007] A plate-type radiator with reinforcing ribs welded to heat dissipation fins, comprising multiple heat dissipation fins, two oil collection pipes, multiple reinforcing ribs, and multiple welds. The heat dissipation fins are composed of two opposing heat dissipation fins with a plate thickness of 1.0–1.2 mm, welded together at their periphery and center. Each heat dissipation fin includes: two confluence ports, one for diverting oil into oil channels after it enters the heat dissipation fins, and the other for the oil in the oil channels to converge and flow out; oil channels, which, when opposite each other, form an oil cavity and connect to the confluence ports; and periphery bonding, including two long-side bonding sections. It consists of four short-side contact points separated by two confluence ports; the long-side edges of its heat sink intersect and overlap with the outer surface of the reinforcing ribs, and the two long-side contact points of its heat sink are symmetrically arranged with respect to the oil collection pipe axis; its welds include: continuous welds between the two confluence ports of multiple heat sinks and the outer diameters of the two oil collection pipes, and spot welds between the outer edges of the long-side contact points of multiple heat sinks and the multiple reinforcing ribs, so as to achieve equal diagonals of the radiator, perpendicularity between the oil collection pipe axis and the long-side edge lines of multiple heat sinks, and to satisfy the firm connection between multiple heat sinks;

[0008] The long edge of the heat sink fin of the present invention intersects with the outer surface of the reinforcing rib, and a gap suitable for a beam-shaped weld is provided at the intersection; a weld droplet weld is formed between the outer edge of the long edge of the heat sink fin and the outer surface of the reinforcing rib, and the weld shape is beam-shaped; the beam-shaped weld is divided into three areas: the weld material and the reinforcing rib fusion welding area, the weld material and the heat sink fin fusion welding area, and the weld material fusion welding connection beam area between the two, wherein the weld material fusion welding connection beam area is the weld metal of the weld material itself.

[0009] The long edge of the heat sink intersects with the outer surface of the reinforcing rib, and a gap suitable for the beam-shaped weld is provided at the intersection, the gap being 1 to 4 mm.

[0010] The welding method for a plate radiator with a reinforcing rib and a heat sink lintel is described below. First, the outer surface of the reinforcing rib is placed at the long edge of the heat sink fin, with a 3mm gap between them. Second, the welding torch starts welding from the arc-starting position of the welding material and the reinforcing rib fusion welding area, then transitions to the welding material fusion welding connection lintel area, forming a welding material fusion welding lintel, and then welds to the arc-ending position of the welding material and the heat sink fin fusion welding area to complete the lintel welding of the heat sink fin and the reinforcing rib.

[0011] The welding method for a plate radiator with a reinforcing rib and a heat sink lintel is described below. Step 1: Setting the welding parameters for the lintel welding: setting the welding voltage to 9V, the arc starting current to 120A, the arc starting time to 0.5s, the welding current to 100A, the welding speed to 3mm / s, the arc ending current to 90A, and the arc ending time to 0.5s. Step 2: Positioning the radiator with the oil collection pipe axis perpendicular to the horizontal plane. Step 3: Placing the outer surface of the reinforcing rib at the long edge of the heat sink fin, with a 3mm gap between them. Step 4: Positioning the welding torch at the arc starting position on the side of the reinforcing rib, with the arc starting position 3mm higher than the upper edge of the outer edge of the long edge of the heat sink fin being welded. Step 5: Starting welding from the arc starting position of the welding material and reinforcing rib fusion welding area, then transitioning to the molten droplet in the welding material fusion welding area of ​​the lintel, forming a welding material fusion welding lintel, and then welding to the arc ending position of the welding material and heat sink fin fusion welding area, completing the lintel welding of the heat sink fin and reinforcing rib.

[0012] The method for welding a plate radiator with a reinforcing rib and a heat sink lintel includes the following steps: Step 1: Setting the parameters for lintel welding: Welding voltage set to 9V, arc starting current set to 120A, arc starting time set to 0.5s, welding current set to 100A, welding speed set to 3mm / s, arc ending current set to 90A, and arc ending time set to 0.5s; Step 2: Placing the radiator with the oil collection pipe axis horizontal to the horizontal plane; Step 3: Placing the outer surface of the reinforcing rib at the long edge of the heat sink fin, with a 3mm gap between them; Step 4: Placing the welding torch at the arc starting position on the side of the reinforcing rib, with the arc starting position vertically aligned with the overlapping line of the long edges of the two heat sink fins to be welded; Step 5: Starting welding from the arc starting position of the welding material and reinforcing rib fusion welding area, then transitioning to the molten droplet in the welding material fusion welding lintel area, forming a welding material fusion welding lintel, and then welding to the arc ending position of the welding material and heat sink fin fusion welding area to complete the lintel welding of the heat sink fin and reinforcing rib.

[0013] (III) Beneficial Effects

[0014] The present invention proposes a plate-type heat sink and a welding method for welding reinforcing ribs to heat dissipation fins, the advantages of which are:

[0015] The gap between the heat sink fins and the welded reinforcing ribs of the transformer plate radiator is set to 3mm. The weld seam is beam-shaped and has no welding blind spots, reducing the difficulty of visual inspection. The beam-shaped weld seam is a single point, which realizes the reinforced connection between the heat sink fins and reduces the amount of consumables used. The 3mm gap between the heat sink fins and the welded reinforcing ribs reduces the welding defect rate, improves the corrosion protection quality of the weld seam, and reduces the later repair rate. Thus, while improving welding efficiency, ensuring product corrosion protection quality, and reducing product manufacturing costs, the service life of the transformer plate radiator is increased. Attached Figure Description

[0016] Figure 1 A partial schematic diagram showing the shape of the beam-shaped weld between the reinforcing rib and the heat sink, and the three areas of the beam-shaped weld fusion welding;

[0017] Figure 2 A partial schematic diagram of the beam-shaped weld between the reinforcing rib and the heat sink.

[0018] Figure 3 A partial schematic diagram of the spot welding of the existing heat sink and the reinforcing rib;

[0019] Figure 4 Axonometric schematic diagram of a plate-type radiator with reinforcing ribs welded to the heat sink lint beam;

[0020] Figure 5 A front view of the plate-type heat sink and the welding torch posture for welding the reinforcing ribs and heat sink lintels;

[0021] Figure 6 for Figure 5 A partially enlarged frontal view of the arc-starting position of the welding between the central reinforcing rib and the heat sink lintel;

[0022] Figure 7 for Figure 5 A magnified front view of the arc-end position of the weld between the central reinforcing rib and the heat sink lintel;

[0023] Figure 8 for Figure 5 A top-down view;

[0024] Figure 9 for Figure 8 A top-view enlarged schematic diagram of the arc-starting position of the welding between the central reinforcing rib and the heat sink lintel;

[0025] Figure 10 for Figure 8 A top-view enlarged schematic diagram of the arc-shaped weld between the central reinforcing rib and the heat sink lintel;

[0026] Figure 11 These are schematic diagrams of the heat sink in front view and cross section.

[0027] Figure 12 This is a magnified schematic diagram showing the shape of the beam-shaped weld and the three areas of the beam-shaped weld fusion welding when the oil collection pipe of the radiator is in a horizontal position.

[0028] Figure 13 for Figure 12 A diagram showing the view from the right.

[0029] Figure 14 A schematic diagram showing the horizontal orientation of the oil collection pipe of the plate radiator for welding the reinforcing ribs and heat sink lintels, and the orientation of the welding torch.

[0030] Figure 15 for Figure 14 A partially enlarged frontal view of the arc-starting position of the welding between the central reinforcing rib and the heat sink lintel;

[0031] Figure 16 for Figure 14 A magnified front view of the arc-end position of the weld between the central reinforcing rib and the heat sink lintel;

[0032] Figure 17 for Figure 14 A diagram showing the view from the right.

[0033] Figure 18 for Figure 17 A partially enlarged frontal view of the arc-starting position of the welding between the central reinforcing rib and the heat sink lintel;

[0034] Figure 19 for Figure 17 A magnified front view of the arc-end position of the weld between the central reinforcing rib and the heat sink lintel;

[0035] In the diagram: 1. Heat sink; 2. Oil collection pipe; 3. Reinforcing rib; 4. Long edge; 5. Outer edge of the long edge joint; 6. Spot weld; 7. Beam-shaped weld; 8. Welding torch. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] See Figure 3 , 4 As shown in Figure 11, a plate-type radiator with reinforcing ribs and heat sink beams welded together comprises multiple heat sinks, two oil collection pipes, multiple reinforcing ribs, and multiple welds. The heat sinks are composed of two opposing heat sink plates with a plate thickness of 1.0–1.2 mm, welded together at their periphery and center. Each heat sink includes: two confluence ports, one for diverting oil into the oil channel after it enters the heat sink, and the other for the oil in the oil channel to converge and flow out; an oil channel, which, when opposite each other, forms an oil cavity and connects to the confluence ports; and two long... It consists of the edge bonding area and four short edge bonding areas separated by two confluence ports; the long edge edge of the heat sink intersects and coincides with the outer surface of the reinforcing rib, and the two long edge bonding areas of the heat sink are symmetrically arranged with the oil collection pipe axis; the weld includes: a continuous weld between the two confluence ports of multiple heat sinks and the outer diameter of the two oil collection pipes, and a spot weld between the outer edge of the long edge bonding area of ​​multiple heat sinks and multiple reinforcing ribs, so as to realize that the diagonals of the radiator are equal, the axis of the oil collection pipe is perpendicular to the long edge lines of multiple heat sinks, and satisfies the firm connection between multiple heat sinks;

[0038] The existing welding method for multiple heat sink fins and reinforcing ribs in transformer finned radiators involves spot welding the reinforcing ribs to two or more points on both sides of the heat sink edge, and the number of reinforcing ribs requiring spot welding to the heat sink fins is large. Furthermore, there are welding blind spots at the contact points and in the narrow areas between the two, causing welding defects that are difficult to visually inspect. These welding defects can also create hidden dangers for subsequent surface corrosion protection. While full welding can solve these problems, the typically narrow space of 45mm between multiple heat sink fins makes it difficult to adjust the welding torch to the optimal welding posture for full welding. Therefore, this method can only reduce the number of defects, but cannot completely eliminate them.

[0039] See Figure 1 , 2 As shown, the long edge of the heat sink fin of the present invention intersects with the outer surface of the reinforcing rib, and a gap suitable for a beam-shaped weld is provided at the intersection; a weld droplet weld is formed between the outer edge of the long edge of the heat sink fin and the outer surface of the reinforcing rib, and the weld shape is beam-shaped; the beam-shaped weld is divided into three areas: the weld material and reinforcing rib fusion welding area, the weld material and heat sink fusion welding area, and the weld material fusion welding connection beam area between the two, wherein the weld material fusion welding connection beam area is the weld metal of the weld material itself.

[0040] The long edge of the heat sink intersects with the outer surface of the reinforcing rib, and a gap suitable for a beam-shaped weld is provided at the intersection, the gap being 1 to 4 mm; the shape of the reinforcing rib is not limited to the shape shown in the figure.

[0041] See Figure 1 , 2 As shown in Figures 5 to 10, the welding method for a plate radiator with a reinforcing rib and a heat sink lintel is as follows: First, the outer surface of the reinforcing rib is placed at the long edge of the heat sink fin, with a 3mm gap between them; Second, the welding torch starts welding from the arc-starting position of the welding material and the reinforcing rib fusion welding area, then transitions to the welding material fusion welding connection lintel area, forming a welding material fusion welding lintel, and then welds to the arc-ending position of the welding material and the heat sink fin fusion welding area to complete the lintel welding of the heat sink fin and the reinforcing rib.

[0042] The welding method for a plate radiator with a reinforcing rib and a heat sink lintel is described below. Step 1: Setting the welding parameters for the lintel welding: setting the welding voltage to DC 19V, the arc starting current to 120A, the arc starting time to 0.5s, the welding current to 100A, the welding speed to 3mm / s, the arc ending current to 90A, and the arc ending time to 0.5s. Step 2: Positioning the radiator with the oil collection pipe axis perpendicular to the horizontal plane. Step 3: Placing the outer surface of the reinforcing rib at the long edge of the heat sink fin, with a 3mm gap between them. Step 4: Positioning the welding torch at the arc starting position on the side of the reinforcing rib, with the arc starting position 3mm higher than the upper edge of the outer edge of the long edge of the heat sink fin being welded. Step 5: Starting welding from the arc starting position of the welding material and reinforcing rib fusion welding area, then transitioning the molten droplets to the lintel welding area to form a welding material fusion lintel, and finally welding to the arc ending position of the welding material and heat sink fin fusion welding area to complete the lintel welding of the heat sink fin and reinforcing rib.

[0043] See Figures 12-19 As shown, the welding method for a plate radiator with reinforcing ribs and heat sink lintels includes the following steps: Step 1, setting the welding parameters for the lintel welding: welding voltage set to DC 19V, arc starting current set to 120A, arc starting time set to 0.5s, welding current set to 100A, welding speed set to 3mm / s, arc ending current set to 90A, and arc ending time set to 0.5s; Step 2, placing the radiator with the oil collection pipe axis horizontal to the horizontal plane; Step 3, welding the reinforcing ribs... The outer surface is placed at the long edge of the heat sink fin, with a 3mm gap between them; Step 4, place the welding gun at the arc-starting position on the side of the reinforcing rib, with the arc-starting position vertically aligned with the overlapping line of the long edges of the two heat sink fins to be welded; Step 5, start welding from the arc-starting position of the welding material and reinforcing rib fusion welding area, then transition the molten droplets to the welding material fusion welding connection beam area, forming a welding material fusion welding beam, and then weld to the arc-ending position of the welding material and heat sink fusion welding area to complete the beam welding of the heat sink fin and reinforcing rib.

[0044] The present invention provides a 3mm gap between the heat sink fins and the welded reinforcing ribs of the transformer plate radiator. The weld seam is beam-shaped with no blind spots, reducing the difficulty of visual inspection. The beam-shaped weld seam is a single point, which achieves a reinforced connection between the reinforcing ribs and the heat sink fins, reducing the amount of consumables used. The 3mm gap between the heat sink fins and the welded reinforcing ribs reduces the welding defect rate, improves the corrosion resistance quality of the weld seam, and reduces the later repair rate. Thus, while improving welding efficiency, ensuring product corrosion resistance quality, and reducing product manufacturing costs, the service life of the transformer plate radiator is increased.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A plate-type radiator with reinforcing ribs and heat sink beams welded together, comprising multiple heat sinks (1), two oil collection pipes (2), multiple reinforcing ribs (3) and multiple welds, wherein the heat sinks (1) are composed of two heat sinks with a plate thickness of 1.0 to 1.2 mm, facing each other, with the periphery and the middle of the plate being welded together; Its heat sink (1) includes: Two manifolds, one for the oil entering the heat sink (1) and then being diverted into the oil channel, and the other for the oil in the oil channel to flow out after being merged; The oil passages, which are arranged in opposite directions, form an oil cavity and are connected to the manifold. Its surrounding fitting area consists of two long-side fitting areas and four short-side fitting areas separated by two confluence ports; The long edge (4) of its heat sink (1) intersects and overlaps with the outer surface of the reinforcing rib (3), and the two long edges of its heat sink (1) are symmetrically arranged with the oil collection pipe (2) axis at the joint. Its welds include: continuous welds between the two confluence ports of multiple heat sinks (1) and the outer diameters of the two oil collection pipes (2), spot welds (6) between the outer edge (5) of the long side contact of multiple heat sinks (1) and multiple reinforcing ribs (3), so as to realize that the diagonals of the radiator are equal, the axis of the oil collection pipe (2) is perpendicular to the long side line of multiple heat sinks (1), and the firm connection between multiple heat sinks (1) is satisfied; The radiator is characterized in that, The long edge (4) of the heat sink (1) intersects with the outer surface of the reinforcing rib (3), and a gap suitable for the beam-shaped weld (7) is provided at the intersection. A weld seam is formed between the outer edge (5) of the long side of the heat sink (1) and the outer surface of the reinforcing rib (3), and the weld seam is in the shape of a beam. The beam-shaped weld (7) is divided into three areas: the welding material and the reinforcing rib (3) fusion welding area, the welding material and the heat sink (1) fusion welding area and the welding material fusion welding connection beam area between the two, and the welding material fusion welding connection beam area is the welding metal of the welding material itself. The welding method for the plate-type radiator, in which the reinforcing rib is welded to the heat sink lint beam, includes the following steps: Step 1: Setting the parameters for beam welding: Set the welding voltage to DC 19V, the arc starting current to 120A, the arc starting time to 0.5s, the welding current to 100A, the welding speed to 3mm / s, the arc ending current to 90A, and the arc ending time to 0.5s. Step 2: Position the radiator so that the axis of the oil collection pipe (2) is perpendicular to the horizontal plane; Step 3: Place the outer surface of the reinforcing rib (3) at the long edge (4) of the heat sink fin (1) of the radiator, with a 3mm gap between them; Step 4: Place the welding torch (8) at the arc-starting position on the side of the reinforcing rib (3), with the arc-starting position 3mm higher than the upper edge of the outer edge (5) of the long side of the heat sink (1) to be welded. Step 5: The welding torch (8) starts welding from the arc-starting position of the welding material and the reinforcing rib (3) fusion welding area, then transitions to the molten droplet of the welding material fusion welding connection beam area, and forms the welding material fusion welding beam, and then welds to the arc-ending position of the welding material and the heat sink (1) fusion welding area to complete the beam welding of the heat sink (1) and the reinforcing rib (3).

2. A plate-type radiator with reinforcing ribs and heat dissipation fins welded together according to claim 1, characterized in that, The long edge (4) of the heat sink (1) intersects with the outer surface of the reinforcing rib (3), and a gap suitable for the beam-shaped weld (7) is provided at the intersection, the gap being 1 to 4 mm.

3. The welding method for a plate-type radiator with reinforcing ribs and heat sink lintels according to claim 1, characterized in that, Firstly, the outer surface of the reinforcing rib (3) is placed at the long edge (4) of the heat sink fin (1) of the radiator, and a 3mm gap is provided between the two. Secondly, the welding gun (8) starts welding from the arc-starting position of the welding material and the reinforcing rib (3) fusion welding area, then transitions to the welding material fusion welding connection beam area, and forms a welding material fusion welding beam, and then welds to the arc-ending position of the welding material and the heat sink (1) fusion welding area, completing the beam welding of the heat sink (1) and the reinforcing rib (3).

4. A welding method for a plate radiator with reinforcing ribs and heat sink beams welded together, characterized in that the plate radiator is composed of multiple heat sinks (1), two oil collection pipes (2), multiple reinforcing ribs (3) and multiple welds, wherein the heat sinks (1) are composed of two heat sinks with a plate thickness of 1.0 to 1.2 mm facing each other, with the periphery and the middle of the plate being welded together. Its heat sink (1) includes: two manifolds, one for the oil entering the heat sink (1) and then being diverted into the oil channel, and the other for the oil in the oil channel to flow out after being merged; oil channels, which are arranged opposite each other to form an oil cavity and are connected to the manifolds. Its surrounding fitting area consists of two long-side fitting areas and four short-side fitting areas separated by two confluence ports; The long edge (4) of its heat sink (1) intersects and overlaps with the outer surface of the reinforcing rib (3), and the two long edges of its heat sink (1) are symmetrically arranged with the oil collection pipe (2) axis at the joint. Its welds include: continuous welds between the two confluence ports of multiple heat sinks (1) and the outer diameters of the two oil collection pipes (2), spot welds (6) between the outer edge (5) of the long side contact of multiple heat sinks (1) and multiple reinforcing ribs (3), so as to realize that the diagonals of the radiator are equal, the axis of the oil collection pipe (2) is perpendicular to the long side line of multiple heat sinks (1), and the firm connection between multiple heat sinks (1) is satisfied; The radiator, The long edge (4) of the heat sink (1) intersects with the outer surface of the reinforcing rib (3), and a gap suitable for the beam-shaped weld (7) is provided at the intersection. A weld seam is formed between the outer edge (5) of the long side of the heat sink (1) and the outer surface of the reinforcing rib (3), and the weld seam is in the shape of a beam. The beam-shaped weld (7) is divided into three areas: the welding material and the reinforcing rib (3) fusion welding area, the welding material and the heat sink (1) fusion welding area and the welding material fusion welding connection beam area between the two, and the welding material fusion welding connection beam area is the welding metal of the welding material itself. The welding method includes the following steps: Step 1: Setting the parameters for beam welding: Set the welding voltage to DC 19V, the arc starting current to 120A, the arc starting time to 0.5s, the welding current to 100A, the welding speed to 3mm / s, the arc ending current to 90A, and the arc ending time to 0.5s. Step 2: Position the radiator so that the axis of the oil collection pipe (2) is horizontal to the horizontal plane; Step 3: Place the outer surface of the reinforcing rib (3) at the long edge (4) of the heat sink fin (1) of the radiator, with a 3mm gap between them; Step 4: Place the welding torch (8) on the side of the reinforcing rib (3) at the arc starting position, with the arc starting position vertically aligned with the overlapping line of the long edge (4) of the two heat dissipation plates of the heat dissipation plate (1) to be welded. Step 5: The welding torch (8) starts welding from the arc-starting position of the welding material and the reinforcing rib (3) fusion welding area, then transitions to the molten droplet of the welding material fusion welding connection beam area, and forms the welding material fusion welding beam, and then welds to the arc-ending position of the welding material and the heat sink (1) fusion welding area to complete the beam welding of the heat sink (1) and the reinforcing rib (3).

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