An automatic clamping laser welding device and method for transformer heat sinks

Abstract

This invention provides an automatic pressing laser welding device and method for transformer heat sinks, belonging to the field of transformer heat sink welding and manufacturing technology. The device includes a base plate, a laser welding gun mechanism, a small wheel pressing mechanism, a wheel axle pressing mechanism, a front-end positioning mechanism, a power transmission mechanism, a small wheel pressing mechanism, a small wheel lifting mechanism, and a width adjustment mechanism. The laser welding gun mechanism and the small wheel lifting mechanism are vertically aligned and located in the middle of the entire device; the small wheel pressing mechanism and the small wheel pressing mechanism are vertically aligned on the left side of the laser welding gun mechanism; the front-end positioning mechanism is located at the center of the left side of the wheel axle pressing mechanism, and both are located on the right side of the laser welding gun mechanism; all the above mechanisms are directly or indirectly supported and fixed by the base plate. This invention achieves automatic pressing and continuous laser welding of heat sinks, significantly improving welding efficiency and quality; this invention can adapt to automatic pressing laser welding of heat sinks of different specifications, and is highly practical and reliable.

Description

Technical Field

[0001] This invention belongs to the field of transformer heat sink welding and manufacturing technology, specifically relating to an automatic pressing laser welding device and method for transformer heat sinks. Background Technology

[0002] As a core component of power systems, the heat dissipation performance of transformers directly affects their operating efficiency and service life. Currently, heat sink manufacturing primarily relies on manual welding or semi-automatic arc welding processes, resulting in low production efficiency and high labor intensity. Existing heat sink welding equipment mostly uses arc spot welding, leading to discontinuous welding and unstable connections between two heat sinks. Laser welding can achieve continuous welding while ensuring no damage to the heat sink surface. However, due to the rigidity of heat sinks, it is difficult to press two heat sinks together tightly using laser welding. Therefore, developing a highly automated, efficient laser welding device capable of automatically pressing heat sinks together has significant practical importance and broad market prospects.

[0003] Publication No. CN117680855A discloses a laser welding device and a laser welding method. The laser welding device includes a welding worktable, a feeding assembly, a laser welding assembly, a turntable assembly, four clamping assemblies, and a discharge assembly. This invention enables automated feeding, docking assembly, fixing, and sorting of welding workpieces, achieving automated transportation and positioning throughout the entire laser welding process. This improves production efficiency and working accuracy. Simultaneously, it provides all-around coverage and stable positioning of the welding workpieces to ensure the stability of their positions during welding, guaranteeing welding accuracy and consistency. This provides a reliable foundation for subsequent welding operations, improving welding quality and efficiency. Furthermore, it allows for fine-tuning of the angle of the workpieces according to specific welding requirements to meet different welding needs, and provides additional support and stability.

[0004] While the above-mentioned solutions improve the clamping force on the welded parts and ensure their stability during welding, they also have limitations. They are not suitable for workpieces with special shapes, such as heat sinks. During the production of heat sinks, multiple sheets need to be evenly arranged on the base in the same direction and welded sequentially. Traditional heat sink welding methods are mostly manual. Although there are automatic welding devices using lasers in the existing technology, due to the large number of sheets on the heat sink, manual feeding is required when installing the sheets on the base of the heat sink. Moreover, because the sheets are thin, they are not easy to clamp during installation. If a robotic arm is used for feeding, more complex positioning sensors need to be installed, which increases the cost.

[0005] Existing methods for continuous welding of transformer heat sinks are limited, and the heat sinks cannot be pressed tightly during laser welding, resulting in low welding efficiency. Summary of the Invention

[0006] To overcome the problems of limited continuous welding methods for transformer heat sinks, inability to clamp the heat sinks during laser welding, and low welding efficiency, this invention provides an automatic clamping laser welding device and method for transformer heat sinks. This invention achieves automatic clamping and continuous laser welding of heat sinks, significantly improving welding efficiency and quality. This invention can adapt to automatic clamping laser welding of heat sinks of different specifications, and is highly practical and reliable.

[0007] The technical solution adopted in this invention is as follows: An automatic clamping laser welding device for transformer heat sinks includes a base plate, a laser welding gun mechanism, a small wheel clamping mechanism, a wheel axle clamping mechanism, a front-end positioning mechanism, a power transmission mechanism, a small wheel pressing mechanism, a small wheel lifting mechanism, and a width adjustment mechanism. The laser welding gun mechanism and the small wheel lifting mechanism are vertically aligned and located in the middle of the entire device. The small wheel clamping mechanism and the small wheel pressing mechanism are vertically aligned and located on the left side of the laser welding gun mechanism. The front-end positioning mechanism is located at the center of the left side of the wheel axle clamping mechanism, and both are located on the right side of the laser welding gun mechanism. All of the above mechanisms are directly or indirectly supported and fixed by the base plate.

[0008] The laser welding gun mechanism is mounted on a gantry truss via a linear guide rail, which is located on a base plate. The linear guide rail is vertically fixed to the side of the gantry truss, and gantry truss columns are provided at both the front and rear ends of the gantry truss. The gantry truss columns are fixed to the base plate to support the gantry truss to the required height, so that several gun heads of the laser welding gun mechanism are vertically suspended in the air at the center of the entire device.

[0009] The small wheel lifting mechanism is located directly below the gun head of the laser welding gun mechanism. The small wheel lifting mechanism includes a lifting wheel, a lifting plate, a cylinder, and a lifting mechanism support. Several lifting wheels are fixed side by side on the lifting plate. Both ends of the lifting plate pass through the lifting mechanism support and are connected to the cylinders respectively. The cylinders are fixed on the upper end of the lifting mechanism support.

[0010] The lifting plate is provided with a groove and has multiple threaded holes. The lifting wheel of the small wheel lifting mechanism connects with different threaded holes in the groove of the lifting plate to change the installation position. The small wheel clamping mechanism includes a cylinder mounting plate two, a clamping small wheel, a guide rod cylinder corresponding to the clamping small wheel, and a bolt. The guide rod end plate of the guide rod cylinder is vertically upward, and the cylinder body of the guide rod cylinder is fixed to the base plate through the cylinder mounting plate two. The clamping small wheel is axially fixed to the guide rod end plate of the guide rod cylinder. The bolt vertically connects the cylinder mounting plate two and the guide rod end plate of the guide rod cylinder to form a single small wheel clamping mechanism.

[0011] The aforementioned small wheel pressing mechanism includes a cylinder mounting plate, a crossbeam, a pressing wheel, a guide rod cylinder corresponding to the pressing wheel, and bolts. The bottom end of the pressing wheel of the pressing mechanism is tangent to the top end of the pressing wheel of the pressing mechanism. The guide rod end plate of the guide rod cylinder corresponding to the pressing wheel is vertically downward. The cylinder body of the guide rod cylinder corresponding to the pressing wheel is fixed to the crossbeam through the cylinder mounting plate. The pressing wheel is axially fixed to the guide rod end plate of the corresponding guide rod cylinder. The bolts corresponding to the pressing wheel vertically connect the cylinder mounting plate and the guide rod end plate of the corresponding guide rod cylinder, forming a single pressing wheel pressing down. Several pressing wheels are provided, and the several pressing wheels are pressed down and fixed side by side on the crossbeam.

[0012] The cylinder mounting plate is in an inverted L-shape and connected to the crossbeam; the two ends of the crossbeam are fixed to the inner sides of the two gantry truss columns, the crossbeam has grooves and multiple threaded holes, and the cylinder mounting plate connects to different threaded holes in the grooves of the crossbeam to change the position of the single pressing wheel. The wheel axle clamping mechanism includes a wheel axle, wheel axle clamping mechanism supports, a cylinder, and a lower roller of the wheel axle clamping mechanism. The wheel axle and the lower roller of the wheel axle clamping mechanism are arranged vertically and fixed inside the two wheel axle clamping mechanism supports. The two ends of the wheel axle pass through the wheel axle clamping mechanism supports and are connected to the cylinder. The wheel axle is provided with several pressure rings whose installation positions can be changed by keys and screws.

[0013] The power transmission mechanism includes a motor, an upper roller, a lower roller, and a support. The upper roller and the lower roller are arranged vertically and fixed inside the two supports. The upper roller passes through the support and is connected to the cylinder. The motor is fixed on the support and connected downwards to the lower roller.

[0014] A welding method for an automatic clamping laser welding device for transformer heat sinks, comprising the following steps: First, two transformer heat sinks are assembled from the previous production line and transported to the left input port of this device. Then, the width adjustment mechanisms at both ends are adjusted to accommodate the width of the heat sinks. Next, the power transmission mechanism transports the heat sinks to the right, and the small wheel pressing mechanism and the small wheel pressing mechanism extend the corresponding small wheels upward and downward respectively, so that the heat sinks are in a pressed state. Then, the heat sinks reach the front positioning mechanism for precise positioning, so that the welding groove of the heat sinks is aligned with the gun head of the laser welding gun mechanism. Finally, when laser welding begins, the laser welding gun mechanism moves downward through the linear guide to find the welding position, and the small wheel lifting mechanism lifts upward to make the lifting small wheel contact the heat sink and align with the gun head of the laser welding gun mechanism. At the same time, the front positioning mechanism retracts downward and exits the working plane, so that the heat sink enters the wheel axle pressing mechanism on the right. During the laser welding process, the heat sinks are pressed by the pressing small wheels and the wheel axle while being continuously transported to the right, and sent out between the upper and lower rollers, realizing automatic pressing and continuous welding.

[0015] The beneficial effects of this invention are: This invention achieves automatic clamping and continuous laser welding of heat sinks, significantly improving welding efficiency and quality. It is adaptable to automatic clamping and laser welding of heat sinks of different specifications, offering strong practicality and high reliability. It solves the problems of limited continuous welding methods for transformer heat sinks, the inability to clamp the heat sinks during laser welding, and low welding efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an automatic clamping laser welding device for transformer heat sinks; Figure 2 This is a cross-sectional view of an automatic clamping laser welding device for transformer heat sinks; Figure 3 This is a schematic diagram of the clamping mechanism of an automatic clamping laser welding device for transformer heat sinks; Figure 4 This is a cross-sectional view of the clamping mechanism of an automatic clamping laser welding device for transformer heat sinks.

[0017] Figure 5 This is a detailed structural diagram of the lifting plate and wheel axle.

[0018] Figure 6 This is a detailed structural diagram of the crossbeam and the corresponding clamping roller and pressing roller.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] In the figure, the attached reference numerals are: 1. Base plate; 2. Laser welding gun mechanism; 3. Small wheel clamping mechanism; 4. Wheel axle clamping mechanism; 5. Front positioning mechanism; 6. Power transmission mechanism; 7. Gantry truss; 8. Gantry truss column; 9. Small wheel pressing mechanism; 10. Small wheel lifting mechanism; 11. Wheel axle; 12. Width adjustment mechanism; 13. Upper roller; 14. Lower roller; 15. Cylinder; 16. Pressure ring; 17. Motor; 18. Lifting plate; 9. Support; 20. Bolt; 21. Guide rod cylinder; 22. Linear guide rail; 23. Cylinder mounting plate one; 24. Crossbeam; 25. Cylinder mounting plate two; 26. Body; 27. Lead screw; 28. Handle; 29. ​​Laser welding gun body; 30. Gun head; 31. Lifting wheel; 32. Lifting mechanism support; 33. Pressing wheel; 34. Guide rod end plate; 35. Pressing wheel; 36. Key; 37. Screw. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0023] Example 1: To overcome the problems of existing methods for continuous welding of transformer heat sinks, the inability to compress the heat sinks during laser welding, and low welding efficiency, this invention provides, as follows: Figures 1-6 The invention discloses an automatic pressing laser welding device and method for transformer heat sinks. The invention realizes automatic pressing and continuous laser welding of heat sinks, which greatly improves welding efficiency and quality. The invention can adapt to automatic pressing laser welding of heat sinks of different specifications, and has strong practicality and high reliability.

[0024] An automatic clamping laser welding device for transformer heat sinks includes a base plate 1, a laser welding gun mechanism 2, a small wheel clamping mechanism 3, a wheel axle clamping mechanism 4, a front-end positioning mechanism 5, a power transmission mechanism 6, a small wheel pressing mechanism 9, a small wheel lifting mechanism 10, and a width adjustment mechanism 12. The laser welding gun mechanism 2 and the small wheel lifting mechanism 10 are arranged vertically aligned and located in the middle of the entire device. The small wheel clamping mechanism 3 and the small wheel pressing mechanism 9 are arranged vertically aligned on the left side of the laser welding gun mechanism 2. The front-end positioning mechanism 5 is located at the center of the left side of the wheel axle clamping mechanism 4, and both are located on the right side of the laser welding gun mechanism 2. All of the above mechanisms are directly or indirectly supported and fixed by the base plate 1.

[0025] In this invention, the laser welding gun mechanism 2, the small wheel pressing mechanism 3, the wheel axle pressing mechanism 4, the front positioning mechanism 5, the power transmission mechanism 6, the small wheel pressing mechanism 9, the small wheel lifting mechanism 10, and the width adjustment mechanism 12 are respectively connected to the control system via electrical signals, thereby achieving overall automation.

[0026] like Figure 1 and Figure 2 As shown, the present invention enables automatic pressing and laser welding of heat sinks of different specifications by means of laser welding gun mechanism 2, small wheel pressing mechanism 3, wheel axle pressing mechanism 4, front end positioning mechanism 5, power transmission mechanism 6, small wheel pressing mechanism 9, small wheel lifting mechanism 10 and width adjustment mechanism 12. It is highly practical and reliable.

[0027] In this invention, the width adjustment mechanism 12 is used to adjust the width, such as... Figure 1 As shown, the width adjustment mechanism 12 includes at least a body 26, a lead screw 27, and a handle 28. The lead screw 27 is connected to both ends of the body 26, and each end of the lead screw 27 is provided with a handle 28. With this structure, when the width needs to be adjusted, the corresponding handle 28 can be rotated for adjustment. For automated processes, the handle 28 is an electric handle, controlled by a control system. In this invention, the width adjustment mechanism 12 is mature prior art, and will not be further described in this invention.

[0028] This invention enables welding while moving, achieving rapid welding via the laser welding gun mechanism 2. In this invention, as... Figure 2 As shown, the laser welding torch mechanism 2 includes at least a laser welding torch body 29 and a torch head 30. During welding operations, efficient and rapid welding is performed through the torch head 30. In this invention, the laser welding torch mechanism 2 is a mature existing technology, and will not be further described in this invention.

[0029] During operation, the heat sink travels along the trajectory shown in this invention. Figure 1 and Figure 4 The location indicated by the center line.

[0030] The principle of this invention is as follows: Two transformer heat sinks are assembled from the previous production line and transported to the left input port of this device. The width adjustment mechanism 12 at both ends is adjusted to adapt to the width of the heat sink. The control system controls the power transmission mechanism 6 to transport the heat sink to the right. The small wheel pressing mechanism 3 and the small wheel pressing mechanism 9 extend the small wheels upward and downward respectively, so that the heat sink is in a pressed state. The heat sink reaches the front positioning mechanism 5 for precise positioning, so that the welding groove of the heat sink is aligned with the gun head 30 of the laser welding gun mechanism 2. When laser welding begins, the laser welding gun mechanism 2 moves downward through the linear guide 22 to find the best welding position. The small wheel lifting mechanism 10 lifts upward so that the lifting small wheel 31 contacts the heat sink and aligns with the gun head 30 of the laser welding gun mechanism 2, which plays a role in slightly pressing the heat sink. At the same time, the front positioning mechanism 5 retracts downward and exits the working plane, so that the heat sink enters the wheel axle pressing mechanism 4 on the right. During the laser welding process, the heat sink is pressed by the small wheel pressing mechanism 3 and the wheel axle pressing mechanism 4 while being continuously transported to the right, realizing automatic pressing and continuous welding. For heat sinks of different specifications, adjust the positions of each small wheel and laser welding gun according to the pre-set mounting holes, and adjust the width adjustment mechanism 12 at the same time to complete the process.

[0031] This invention is adaptable to automatic clamping laser welding of heat sinks of different specifications, offering strong practicality and high reliability. It solves the problems of limited continuous welding methods for transformer heat sinks, the inability to clamp the heat sinks during laser welding, and low welding efficiency. This invention achieves automatic clamping of heat sinks and continuous laser welding, significantly improving welding efficiency and quality.

[0032] Example 2: Based on Embodiment 1, in this embodiment, preferably, the laser welding gun mechanism 2 is connected to the gantry truss 8 by a linear guide rail 22, and the gantry truss 8 is located on the base plate 1; the linear guide rail 22 is vertically fixed to the side of the gantry truss 8, and gantry truss columns 7 are provided at both the front and rear ends of the gantry truss 8. The gantry truss columns 7 are fixed on the base plate 1 to support the gantry truss 8 to the required height, so that several gun heads 30 of the laser welding gun mechanism 2 are vertically suspended in the air at the center of the entire device.

[0033] Preferably, the small wheel lifting mechanism 10 is located directly below the laser welding gun mechanism 2 head 30. The small wheel lifting mechanism 10 includes lifting small wheels 31, lifting plate 18, cylinder 15 and lifting mechanism support 32. Several lifting small wheels 31 are fixed side by side on the lifting plate 18. The two ends of the lifting plate 18 pass through the lifting mechanism support 32 and are respectively connected to the cylinder 15. The cylinder 15 is fixed on the upper end of the lifting mechanism support 32.

[0034] Preferably, the lifting plate 18 is provided with a groove and has multiple threaded holes, and the lifting wheel 31 of the small wheel lifting mechanism 10 is connected to different threaded holes in the groove of the lifting plate 18 to change the installation position. In this invention, such as Figure 4 , Figure 5 and Figure 6 As shown, the lifting plate 18 has a groove according to the welding position of the heat sink and multiple threaded holes. In this way, the lifting wheel 31 of the small wheel lifting mechanism 10 can be connected to different threaded holes in the groove of the lifting plate 18 to change the installation position. This makes it easy to adjust the position and ensures that it is suitable for various positions.

[0035] Preferably, the small wheel clamping mechanism 3 includes a cylinder mounting plate 25, a clamping small wheel 33, a guide rod cylinder 21 corresponding to the clamping small wheel 33, and a bolt 20. The guide rod end plate 34 of the guide rod cylinder 21 is vertically upward. The cylinder body of the guide rod cylinder 21 is fixed to the base plate 1 through the cylinder mounting plate 25. The clamping small wheel 33 is axially fixed to the guide rod end plate 34 of the guide rod cylinder 21. The bolt 20 vertically connects the cylinder mounting plate 25 and the guide rod end plate 34 of the guide rod cylinder 21 to form a single small wheel clamping mechanism.

[0036] In this invention, such as Figure 6 As shown, the small wheel clamping mechanism 3 has several clamping small wheels 33 fixed in parallel on the base plate 1.

[0037] Preferably, the small wheel pressing mechanism 9 includes a cylinder mounting plate 23, a crossbeam 24, a pressing wheel 35, a guide rod cylinder 21 corresponding to the pressing wheel 35, and a bolt 20. The bottom end of the pressing wheel 35 of the small wheel pressing mechanism 9 is tangent to the top end of the pressing wheel 33 of the small wheel pressing mechanism 3. The guide rod end plate 34 of the guide rod cylinder 21 corresponding to the pressing wheel 35 is vertically downward. The cylinder body of the guide rod cylinder 21 corresponding to the pressing wheel 35 is fixed to the crossbeam 24 through the cylinder mounting plate 23. The pressing wheel 35 is axially fixed to the guide rod end plate 34 of the corresponding guide rod cylinder 21. The bolt 20 corresponding to the pressing wheel 35 is vertically connected to the cylinder mounting plate 23 and the guide rod end plate 34 of the corresponding guide rod cylinder 21 to form a single pressing wheel 35 pressing down. There are several pressing wheels 35, and several pressing wheels 35 are pressed down and fixed side by side on the crossbeam 24.

[0038] Preferably, the cylinder mounting plate 23 is inverted L-shape and connected to the crossbeam 24; the two ends of the crossbeam 24 are fixed to the inner side of the two gantry truss columns 7, the crossbeam 24 is provided with grooves and multiple threaded holes, and the cylinder mounting plate 23 is connected to different threaded holes in the grooves of the crossbeam 24 to change the downward position of the single pressing wheel 35. In this invention, the bolts 20 corresponding to the pressing rollers 35 are vertically connected to the cylinder mounting plate 25 and the guide rod end plate 34 of the corresponding guide rod cylinder 21, which serves as a limiting function; there are several pressing rollers 35, and several pressing rollers 35 are pressed down and fixed side by side on the crossbeam 24.

[0039] In this invention, such as Figure 3 and Figure 6 As shown, the cylinder mounting plate 23 is inverted L-shape and connected to the crossbeam 24. This allows adjustment of the distance between the pressing wheel 35 of the pressing mechanism 9 and the laser welding gun mechanism 2, ensuring that the pressing mechanism 9 and the pressing mechanism 3 are on the same center line. The crossbeam 24 has grooves according to the dimensions of the heat sink welding position and multiple threaded holes. The cylinder mounting plate 23 can connect to different threaded holes within the grooves of the crossbeam 24 to change the pressing position of a single pressing wheel 35.

[0040] Preferably, the wheel axle pressing mechanism 4 includes a wheel axle 11, a wheel axle pressing mechanism support, a cylinder 15, and a lower roller of the wheel axle pressing mechanism. The wheel axle 11 and the lower roller of the wheel axle pressing mechanism are arranged vertically and fixed inside the two wheel axle pressing mechanism supports. The two ends of the wheel axle 11 pass through the wheel axle pressing mechanism support and are connected to the cylinder 15. The wheel axle 11 is provided with a plurality of pressure rings 16 whose installation positions can be changed by keys 36 and screws 37.

[0041] like Figure 5 As shown, the axle 11 is provided with several pressure rings 16 whose installation positions can be changed by keys 36 and screws 37.

[0042] In this invention, the pressing wheel 33 of the wheel pressing mechanism 3, the lifting wheel 31 of the wheel lifting mechanism 10, and the pressing wheel 35 of the wheel pressing mechanism 9 all use the same type of wheel.

[0043] Preferably, the power transmission mechanism 6 includes a motor 17, an upper roller 13, a lower roller of the power transmission mechanism, and a support for the power transmission mechanism. The upper roller 13 and the lower roller of the power transmission mechanism are arranged vertically and fixed inside the two supports for the power transmission mechanism. The upper roller 13 passes through the support 19 and is connected to the cylinder 15. The motor 17 is fixed on the support for the power transmission mechanism and is connected downward to the lower roller of the power transmission mechanism.

[0044] In this invention, the power transmission mechanism support of the power transmission mechanism 6, the wheel axle clamping mechanism support of the wheel axle clamping mechanism 4, and the lifting mechanism support 32 of the small wheel lifting mechanism all adopt the same type of support 19.

[0045] In this invention, the lower roller of the wheel axle pressing mechanism 4 and the lower roller of the power transmission mechanism 6 both adopt the same type of lower roller 14.

[0046] This invention solves the problems of limited continuous welding methods for transformer heat sinks, the inability to clamp the heat sinks tightly during laser welding, and low welding efficiency. This invention can adapt to automatic clamping laser welding of heat sinks of different specifications, offering strong practicality and high reliability.

[0047] Example 3: Based on Embodiment 1 or 2, this embodiment preferably provides an automatic clamping laser welding method for transformer heat sinks, the specific steps of which are as follows: First, two transformer heat sinks are assembled from the previous production line and transported to the left input port of this device. Then, the width adjustment mechanisms 12 at both ends are adjusted to accommodate the width of the heat sinks. Next, the power transmission mechanism 6 transports the heat sinks to the right, and the small wheel pressing mechanism 3 and the small wheel pressing mechanism 9 extend the corresponding small wheels upward and downward respectively, so that the heat sinks are in a pressed state. Then, the heat sinks reach the front positioning mechanism 5 for precise positioning, so that the welding groove of the heat sinks is aligned with the gun head 30 of the laser welding gun mechanism 2. Finally, when laser welding begins, the laser welding gun mechanism 2 moves downward through the linear guide 22 to find the welding position, and the small wheel lifting mechanism 10 lifts upward so that the corresponding lifting small wheel 31 contacts the heat sink and aligns with the laser welding gun head. At the same time, the front positioning mechanism 5 retracts downward and exits the working plane, so that the heat sink enters the wheel axle pressing mechanism 4 on the right. During the laser welding process, the heat sinks are pressed by the small wheel pressing mechanism 3 and the wheel axle pressing mechanism 4 while being continuously transported to the right, and sent out between the upper roller 13 and the lower roller 14, realizing automatic pressing and continuous welding.

[0048] This invention enables automatic clamping and continuous laser welding of heat sinks, significantly improving welding efficiency and quality. It is adaptable to automatic clamping and laser welding of heat sinks of different specifications, making it highly practical and reliable. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0050] The examples above are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention fall within the scope of protection of the present invention. Device structures and method steps not described in detail in this invention are prior art and will not be further described in this invention.

Claims

1. An automatic clamping laser welding device for transformer heat sinks, characterized in that: The device includes a base plate (1), a laser welding gun mechanism (2), a small wheel clamping mechanism (3), a wheel axle clamping mechanism (4), a front-end positioning mechanism (5), a power transmission mechanism (6), a small wheel pressing mechanism (9), a small wheel lifting mechanism (10), and a width adjustment mechanism (12). The laser welding gun mechanism (2) and the small wheel lifting mechanism (10) are arranged vertically aligned and located in the middle of the entire device. The small wheel clamping mechanism (3) and the small wheel pressing mechanism (9) are arranged vertically aligned on the left side of the laser welding gun mechanism (2). The front-end positioning mechanism (5) is located at the center of the left side of the wheel axle clamping mechanism (4), and both are located on the right side of the laser welding gun mechanism (2). All of the above mechanisms are directly or indirectly supported and fixed by the base plate (1). The lifting plate (18) of the small wheel lifting mechanism (10) is provided with a groove and has multiple threaded holes. The lifting wheel (31) of the small wheel lifting mechanism (10) is connected to different threaded holes in the groove of the lifting plate (18) to change the installation position. The small wheel clamping mechanism (3) includes a cylinder mounting plate two (25), a clamping small wheel (33), a guide rod cylinder (21) corresponding to the clamping small wheel (33), and a bolt (20). The guide rod end plate (34) of the guide rod cylinder (21) is vertically upward. The cylinder body of the guide rod cylinder (21) is fixed on the base plate (1) through the cylinder mounting plate two (25). The clamping small wheel (33) is axially fixed on the guide rod end plate (34) of the guide rod cylinder (21). The bolt (20) vertically connects the cylinder mounting plate two (25) and the guide rod end plate (34) of the guide rod cylinder (21) to form a single small wheel clamping mechanism. The small wheel pressing mechanism (9) includes a cylinder mounting plate (23), a crossbeam (24), a pressing wheel (35), a guide rod cylinder (21) corresponding to the pressing wheel (35), and a bolt (20). The bottom end of the pressing wheel (35) of the small wheel pressing mechanism (9) is tangent to the top end of the pressing wheel (33) of the small wheel pressing mechanism (3). The guide rod end plate (34) of the guide rod cylinder (21) corresponding to the pressing wheel (35) is vertically downward. The cylinder body of the guide rod cylinder (21) corresponding to the pressing wheel (35) is fixed on the crossbeam (24) through the cylinder mounting plate (23). The pressing wheel (35) is axially fixed on the guide rod end plate (34) of the corresponding guide rod cylinder (21). (35) The corresponding bolt (20) vertically connects the cylinder mounting plate (23) and the guide rod end plate (34) of the corresponding guide rod cylinder (21) to form a single pressing wheel (35) pressing mechanism; the pressing wheel (35) is provided in several units, and the pressing wheels (35) are pressed down and fixed in parallel on the crossbeam (24); the cylinder mounting plate (23) is in an inverted L shape and connected to the crossbeam (24); the two ends of the crossbeam (24) are fixed to the inner side of the two gantry truss columns (7), the crossbeam (24) is provided with a groove and has multiple threaded holes, the cylinder mounting plate (23) is connected to different threaded holes in the groove of the crossbeam (24) to change the pressing position of the single pressing wheel (35).

2. The automatic clamping laser welding device for transformer heat sinks according to claim 1, characterized in that: The laser welding gun mechanism (2) is mounted on the gantry truss (8) via a linear guide rail (22). The gantry truss (8) is located on the base plate (1). The linear guide rail (22) is vertically fixed to the side of the gantry truss (8). The gantry truss (8) has gantry truss columns (7) at both ends. The gantry truss columns (7) are fixed on the base plate (1) to support the gantry truss (8) to the required height, so that several gun heads (30) of the laser welding gun mechanism (2) are vertically suspended in the air at the center of the entire device.

3. The automatic clamping laser welding device for transformer heat sinks according to claim 2, characterized in that: The small wheel lifting mechanism (10) is located directly below the gun head (30) of the laser welding gun mechanism (2). The small wheel lifting mechanism (10) includes lifting small wheels (31), lifting plate (18), cylinder (15) and lifting mechanism support (32). Several lifting small wheels (31) are fixed side by side on the lifting plate (18). The two ends of the lifting plate (18) pass through the lifting mechanism support (32) and are respectively connected to the cylinder (15). The cylinder (15) is fixed on the upper end of the lifting mechanism support (32).

4. The automatic clamping laser welding device for transformer heat sinks according to claim 1, characterized in that: The wheel axle clamping mechanism (4) includes a wheel axle (11), a wheel axle clamping mechanism support, a cylinder (15), and a lower roller of the wheel axle clamping mechanism. The wheel axle (11) and the lower roller of the wheel axle clamping mechanism are arranged vertically and fixed inside the two wheel axle clamping mechanism supports. The two ends of the wheel axle (11) pass through the wheel axle clamping mechanism support and are connected to the cylinder (15). The wheel axle (11) is provided with several pressure rings (38) whose installation positions can be changed by keys (36) and screws (37).

5. The automatic clamping laser welding device for transformer heat sinks according to claim 1, characterized in that: The power transmission mechanism (6) includes a motor (17), an upper roller (13), a lower roller of the power transmission mechanism, and a support for the power transmission mechanism. The upper roller (13) and the lower roller of the power transmission mechanism are arranged vertically and fixed inside the two supports for the power transmission mechanism. The upper roller (13) passes through the support (19) and is connected to the cylinder (15). The motor (17) is fixed on the support for the power transmission mechanism and is connected downward to the lower roller of the power transmission mechanism.

6. The welding method of an automatic clamping laser welding device for transformer heat sinks according to any one of claims 1-5, characterized in that: The specific steps are as follows: First, the two transformer heat sinks are combined and transported from the previous production line to the left input port of this device; then the width adjustment mechanism at both ends is adjusted to adapt to the width of the heat sink; then the power transmission mechanism (6) transmits the heat sink to the right, and the small wheel pressing mechanism (3) and the small wheel pressing mechanism (9) extend the corresponding small wheels upward and downward respectively, so that the heat sink is in a pressed state; Then, the heat sink reaches the front positioning mechanism (5) for precise positioning, so that the welding groove of the heat sink is aligned with the gun head (30) of the laser welding gun mechanism (2); finally, when laser welding begins, the laser welding gun mechanism (2) moves downward through the linear guide rail (22) to find the welding position, and the small wheel lifting mechanism (10) lifts upward so that the lifting small wheel (31) contacts the heat sink and connects the heat sink with the gun head (30) of the laser welding gun mechanism (2); at the same time, the front positioning mechanism (5) retracts downward and exits the working plane, so that the heat sink enters the wheel axle pressing mechanism (4) on the right side; during the laser welding process, the heat sink is pressed by the pressing small wheel (33) and the wheel axle (11) while being continuously conveyed to the right side and sent out from between the upper roller (13) and the lower roller (14) to achieve automatic pressing and continuous welding.

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