An automatic welding machine and a method for welding fins of a heat sink

Abstract

The present application belongs to the technical field of welding, and particularly relates to an automatic welding machine and a welding method for radiator fins, which comprises a mounting frame, the lower end of the mounting frame is provided with a material conveying part, the material conveying part is responsible for conveying the radiator fins and the pipeline; the upper part of the mounting frame is provided with a material pushing part, the material pushing part is matched with the material conveying part, the material pushing part pushes the radiator fins in the welding position to the welding position; then the brazing paste at the positions of the radiator fins and the pipeline is heated and melted through heating, thereby completing the welding of the pipeline and the radiator fins; the upper part of the material pushing part is provided with a paste adding part, the paste adding part applies the brazing paste required for welding to the welding positions of the pipeline and the radiator fins, the paste adding part comprises a paste adding seat, a paste adding disc, a driving rack and a driving push rod, and the paste adding seat is slidingly arranged in the interior of the upper end of the mounting frame. The present application pushes the stored radiator fins to the pipeline to perform automatic welding, and simultaneously makes the paste adding part away from the heating seat during welding to avoid the brazing paste in the paste adding part from being heated and melted to block the nozzle.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to an automatic welding machine and a welding method for heat sink fins. Background Technology

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure.

[0003] Modern welding uses a variety of energy sources, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasound.

[0004] In the radiator manufacturing industry, efficient and intelligent manufacturing of heat sinks and manifolds has always been a challenge. Due to assembly errors, traditional manufacturing methods generally involve manual welding operations. During welding, workers can only complete the welding of heat sinks and multiple manifolds in a confined space. The small spacing between the manifolds further restricts the worker's operating space, making welding extremely inconvenient and resulting in low welding efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding machine and a welding method for heat sink fins, which can push the stored heat sink fins to the pipe for automatic welding, while keeping the solder paste filling part away from the heating seat during welding to prevent the solder paste in the filling part from melting and clogging the nozzle.

[0006] The specific technical solution adopted by this invention is as follows:

[0007] An automatic welding machine includes a mounting frame, the lower end of which is provided with a material conveying section, which is responsible for conveying heat sinks and pipes;

[0008] The upper part of the mounting bracket is provided with a pushing part, which cooperates with the conveying part. The pushing part pushes the heat sink in the welding position to the outer edge of the pipe. Then, the solder paste at the heat sink and the pipe is heated and melted to complete the welding of the pipe and the heat sink.

[0009] The upper part of the feeding section is provided with a paste filling section, which applies the solder paste required for welding to the welding joint between the pipe and the heat sink. The paste filling section includes a paste filling seat, a paste filling disc, a drive rack, and a drive push rod. The paste filling seat is slidably disposed inside the upper end of the mounting bracket. Multiple paste filling discs are provided and are rotatably disposed inside the paste filling seat. The drive rack is slidably disposed inside the paste filling seat, and one side of the drive rack meshes with the outer edge of the paste filling disc. The drive push rod is fixedly disposed inside the paste filling seat, and the output end of the drive push rod is fixedly connected to one end of the drive rack.

[0010] The paste-filling section also includes a lifting block, which is fixedly installed on the upper part of the paste-filling seat and cooperates with the pushing section;

[0011] The material conveying unit includes a discharge motor, a discharge screw, a discharge seat, a feeding motor, a feeding screw, a feeding seat, and a storage bin. The discharge motor is fixedly connected to the lower end of the mounting frame. Two discharge screws are rotatably mounted inside the lower end of the mounting frame, and their lower ends are connected by a transmission toothed belt. One of the discharge screws' lower ends is fixedly connected to the output end of the discharge motor. The discharge seat is located between the two discharge screws, and the interior of both ends of the discharge seat is threadedly connected to the outer edge of the corresponding discharge screw. The feeding motor is fixedly connected to the lower end of the mounting frame. Two feeding screws are rotatably mounted inside the lower end of the mounting frame. The lower ends of the two feeding screws are connected by a transmission toothed belt. The lower end of one of the feeding screws is fixedly connected to the output end of the feeding motor. The feeding seat is located between the two feeding screws, and the interior of both ends of the feeding seat is threadedly connected to the outer edge of the corresponding feeding screw. Two storage boxes are provided and located on both sides of the mounting frame. The interior of the storage box cooperates with the feeding seat.

[0012] The pushing part includes a pushing cylinder, a pushing plate, a pushing seat, a heating seat, and a lifting block. The pushing cylinder is fixedly installed at the upper end inside the mounting frame. The upper part of the pushing plate is fixedly connected to the output end of the pushing cylinder. The upper end of the pushing seat is slidably connected to the interior of the pushing plate. The two sides of the pushing seat are slidably connected to the interior of the mounting frame. The upper end of the heating seat is also slidably connected to the interior of the pushing plate. The two sides of the heating seat are slidably connected to the interior of the mounting frame. The lifting block is fixedly connected to the upper part of the pushing plate and cooperates with the lifting block.

[0013] The pusher seat cooperates with the heat sink inside the storage box.

[0014] In a preferred embodiment, the discharge seat is provided with a locking block and an elastic extrusion member inside. The locking block is slidably disposed inside the discharge seat, and one side of the locking block cooperates with the outer edge of the pipe. The elastic extrusion member is disposed between the discharge seat and the locking block.

[0015] In a preferred embodiment, one side of the locking block is arc-shaped, and a rubber gasket is provided on the inner side of the arc.

[0016] In a preferred embodiment, the lower end of the heating base is provided with an electric heater, which is configured to be arc-shaped.

[0017] In a preferred embodiment, the push plate has a push groove and a heating groove inside. Both the push groove and the heating groove have a horizontal stationary section and an inclined extrusion section inside. The inside of the push groove cooperates with the upper end of the pusher seat, and the inside of the heating groove cooperates with the upper end of the heating seat.

[0018] In a preferred embodiment, the lower end of the paste-filling tray is provided with at least three nozzles arranged in a ring around the pipe.

[0019] A welding method for heat sink fins using an automatic welding machine, applied to the aforementioned automatic welding machine, includes the following steps:

[0020] Step 1: Pass one end of the pipe through the inside of the paste filling tray and fix it inside the discharge seat;

[0021] Step 2: Install the storage bins on both sides of the mounting frame to complete the stacking of the heat sinks;

[0022] Step 3: Start the pusher cylinder to push the heat sink inside the storage box to the outer edge of the pipe through the pusher seat. Then stop the pusher cylinder to complete the feeding.

[0023] Step 4: Using the paste-filling tray, rotate and fill the solder joints of the heat sink and pipes with solder paste to complete the addition of solder paste;

[0024] Step 5: Then continue to start the pusher cylinder to push the heating seat to the welding point of the heat sink and the pipe through the pusher plate, and heat it to melt the solder paste at the welding point of the heat sink and the pipe. At the same time, the lifting block on the upper part of the pusher plate squeezes the lifting block to move the paste filling part upward and away from the heating seat.

[0025] Step 6: After the welding of the heat sink and the pipe is completed, the pusher cylinder in the pusher section retracts, and the entire pusher section returns to the position in Step 2.

[0026] Step 7: Drive the discharge screw to rotate via the discharge motor. The rotation of the discharge screw causes the discharge seat to move downward. The discharge seat causes the pipe to move downward. The distance the discharge seat moves is the distance between the heat sinks.

[0027] Step 8: Drive the feeding screw to rotate via the feeding motor. The feeding screw drives the feeding seat to lift the heat sink inside the storage box to the top of the storage box, thus completing the feeding of a new heat sink.

[0028] The technical effects achieved by this invention are as follows:

[0029] This invention employs a paste-filling section design. The output end of the drive push rod drives the drive rack to move, which in turn drives the paste-filling disc meshing with it to rotate. This allows the solder paste to be squeezed out and accumulated along the outer edge of the pipe, increasing the coverage of the solder paste at the welding point of the pipe and the heat sink, thereby improving the welding quality.

[0030] The present invention, through the design of the pusher section, can not only push the heat sink to the pipe, but also raise the height of the paste filling section, so that the paste filling section is away from the heating seat, thus avoiding the solder paste inside the paste filling nozzle from melting and solidifying and clogging the nozzle.

[0031] The present invention adopts a feeding section design, which controls the movement distance of the pipeline to set the spacing of the heat sinks, and can also push the heat sinks to the pushing section for replenishment. Attached Figure Description

[0032] Figure 1 This is an overall schematic diagram of an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the upper internal structure of an embodiment of the present invention;

[0034] Figure 3 This is an overall sectional view of an embodiment of the present invention;

[0035] Figure 4 This is an overall front sectional view of an embodiment of the present invention;

[0036] Figure 5 This is an embodiment of the present invention. Figure 4 Schematic diagram at point A in the middle;

[0037] Figure 6 This is an overall side sectional view of an embodiment of the present invention;

[0038] Figure 7 This is an exploded top view of an embodiment of the present invention;

[0039] Figure 8 This is an exploded view of the ointment filling section according to an embodiment of the present invention;

[0040] Figure 9 This is an exploded view of the feeding section in an embodiment of the present invention;

[0041] Figure 10 This is an exploded view of the material conveying section according to an embodiment of the present invention;

[0042] Figure 11 This is an exploded view of the inside of the discharge seat in an embodiment of the present invention.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Mounting frame; 2. Conveying section; 201. Discharge motor; 202. Discharge screw; 203. Discharge seat; 2031. Locking block; 2032. Elastic extrusion component; 204. Feeding motor; 205. Feeding screw; 206. Feeding seat; 207. Storage box; 3. Pushing section; 301. Pushing cylinder; 302. Pushing plate; 3021. Pushing groove; 3022. Heating groove; 303. Pushing seat; 304. Heating seat; 305. Lifting block; 4. Paste filling section; 401. Paste filling seat; 402. Paste filling tray; 403. Drive rack; 404. Drive push rod; 405. Lifting block; 406. Elastic reset component; 5. Heat sink; 6. Pipeline. Detailed Implementation

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0048] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0049] Please see Figures 1 to 11 As shown, the present invention provides an automatic welding machine, including a mounting frame 1, and a material conveying part 2 is provided at the lower end of the mounting frame 1. The material conveying part 2 is responsible for conveying the heat sink 5 and the pipe 6.

[0050] The upper part of the mounting bracket 1 is provided with a pusher part 3, which cooperates with the conveying part 2. The pusher part 3 pushes the heat sink 5 in the welding position to the outer edge of the pipe 6. Then, the solder paste at the heat sink 5 and the pipe 6 is heated and melted to complete the welding of the pipe 6 and the heat sink 5.

[0051] The upper part of the feeding part 3 is provided with a paste filling part 4. The paste filling part 4 applies the solder paste required for welding to the welding joint between the pipe 6 and the heat sink 5. The paste filling part 4 includes a paste filling seat 401, a paste filling plate 402, a drive rack 403, and a drive push rod 404. The paste filling seat 401 is slidably disposed inside the upper end of the mounting bracket 1. Multiple paste filling plates 402 are provided, and the paste filling plates 402 are rotatably disposed inside the paste filling seat 401. The drive rack 403 is slidably disposed inside the paste filling seat 401, and one side of the drive rack 403 meshes with the outer edge of the paste filling plate 402. The drive push rod 404 is fixedly disposed inside the paste filling seat 401, and the output end of the drive push rod 404 is fixedly connected to one end of the drive rack 403.

[0052] The paste filling section 4 also includes a lifting block 405, which is fixedly disposed on the upper part of the paste filling seat 401 and cooperates with the pusher section 3.

[0053] Specifically, one end of the pipe 6 is passed through the inside of the paste-filling tray 402 and fixed inside the discharge seat 203 to complete the installation of the pipe 6. Then, the storage box 207 containing the heat sink 5 is installed on both sides of the mounting frame 1 to complete the installation and stacking of the heat sink 5. The pusher cylinder 301 is started to push the heat sink 5 inside the storage box 207 to the outer edge of the pipe 6 through the pusher seat 303. The pusher cylinder 301 stops to complete the feeding of the heat sink 5.

[0054] Solder paste is applied to the weld joint between the heat sink 5 and the pipe 6 via the paste application tray 402. The output end of the drive push rod 404 drives the drive rack 403 to move, causing the drive rack 403 to rotate the paste application tray 402 that meshes with it. This allows the solder paste to be squeezed out and accumulated along the outer edge of the pipe 6, improving the coverage of the solder paste at the weld joint between the pipe 6 and the heat sink 5 and improving the welding quality.

[0055] Then, the pusher cylinder 301 continues to be activated, and the heating seat 304 is pushed to the welding point of the heat sink 5 and the pipe 6 through the pusher plate 302. The heat is applied to melt the solder paste at the welding point of the heat sink 5 and the pipe 6. At the same time, the lifting block 305 on the upper part of the pusher plate 302 squeezes the lifting block 405 to move the paste filling part 4 upward and away from the heating seat 304, so as to prevent the solder paste inside the paste filling plate 402 from melting and clogging the nozzle.

[0056] After the welding of the heat sink 5 and the pipe 6 is completed, the push cylinder 301 in the push part 3 retracts, the push part 3 is reset as a whole, and at the same time the paste filling part 4 is reset by the pressure of the elastic reset member 406 after the push part 3 is no longer squeezed.

[0057] Then, the discharge motor 201 drives the discharge screw 202 to rotate. The rotation of the discharge screw 202 drives the discharge seat 203 to move downward. The discharge seat 203 drives the pipe 6 with the heat sink 5 welded on it to move downward. The distance that the discharge seat 203 moves is the distance after the heat sink 5 is welded.

[0058] Then, the feeding motor 204 drives the feeding screw 205 to rotate, and the feeding screw 205 drives the feeding seat 206 to push the heat sink 5 inside the storage box 207 upward to the top inside the storage box 207, completing the feeding process of the new heat sink 5 and repeating the feeding process of the feeding cylinder 301. Thus, the welding of the pipe 6 and the heat sink 5 is completed.

[0059] Please see Figures 2 to 6 ,as well as Figure 10 , Figure 11 The conveying unit 2 shown includes a discharge motor 201, a discharge screw 202, a discharge seat 203, a feeding motor 204, a feeding screw 205, a feeding seat 206, and a storage bin 207. The discharge motor 201 is fixedly connected to the lower end inside the mounting frame 1. Two discharge screws 202 are rotatably mounted inside the lower end of the mounting frame 1, and their lower ends are connected by a transmission toothed belt. The lower end of one of the discharge screws 202 is fixedly connected to the output end of the discharge motor 201. The discharge seat 203 is located between the two discharge screws 202, and the interiors of both ends of the discharge seat 203 are connected to the exteriors of the corresponding discharge screws 202. The feeding motor 204 is fixedly connected to the lower end of the mounting frame 1 via a threaded connection. Two feeding screws 205 are rotatably mounted inside the lower end of the mounting frame 1. The lower ends of the two feeding screws 205 are connected by a transmission toothed belt. The lower end of one of the feeding screws 205 is fixedly connected to the output end of the feeding motor 204. The feeding seat 206 is located between the two feeding screws 205, and the interior of both ends of the feeding seat 206 is threadedly connected to the outer edge of the corresponding feeding screw 205. Two storage boxes 207 are provided, and the storage boxes 207 are located on both sides of the mounting frame 1. The interior of the storage box 207 cooperates with the feeding seat 206.

[0060] Then, the discharge motor 201 drives the discharge screw 202 to rotate. The rotation of the discharge screw 202 drives the discharge seat 203 to move downward. The discharge seat 203 drives the pipe 6 with the heat sink 5 welded on it to move downward. The distance that the discharge seat 203 moves is the distance after the heat sink 5 is welded.

[0061] Then, the feeding motor 204 drives the feeding screw 205 to rotate, and the feeding screw 205 drives the feeding seat 206 to push the heat sink 5 inside the storage box 207 upward to the top of the storage box 207, completing the feeding process of the new heat sink 5 and repeating the feeding process of the pusher cylinder 301.

[0062] Furthermore, both the discharge motor 201 and the feeding motor 204 are servo motors electrically connected to an external controller. The discharge motor 201 and the feeding motor 204 drive their respective discharge screws 202 and feeding screws 205 to rotate, which can precisely adjust the distance between the heat sinks 5 on the outer edge of the pipe 6 and the conveying height of the heat sinks 5 inside the storage box 207, thereby improving the overall accuracy of the equipment.

[0063] Please see Figure 11 As shown, the discharge seat 203 is equipped with a locking block 2031 and an elastic extrusion member 2032. The locking block 2031 is slidably disposed inside the discharge seat 203. One side of the locking block 2031 is engaged with the outer edge of the pipe 6. The upper end of the locking block 2031 is provided with an inclined surface, which is engaged with the lower end of the pipe 6. The elastic extrusion member 2032 is disposed between the discharge seat 203 and the locking block 2031. When the pipe 6 enters between the locking blocks 2031, it extrudes the inclined surface of the locking block 2031, causing the locking blocks 2031 to open under force. After the lower end of the pipe 6 is completely inside the locking block 2031, the elastic extrusion member 2032 elastically extrudes the locking block 2031, causing the locking block 2031 to extrude the lower end of the pipe 6, thus fixing the lower end of the pipe 6.

[0064] Please see Figure 11 As shown, one side of the locking block 2031 is set in an arc shape, and a rubber pad is provided on the inner side of the arc. The arc shape increases the contact area between the locking block 2031 and the pipe 6, and the rubber pad further increases the friction between the locking block 2031 and the pipe 6, preventing the pipe 6 from falling off the locking block 2031 and increasing the stability of the pipe 6 when it moves.

[0065] Please see Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 9 As shown, the pushing part 3 includes a pushing cylinder 301, a pushing plate 302, a pushing seat 303, a heating seat 304, and a lifting block 305. The pushing cylinder 301 is fixedly installed at the upper end inside the mounting frame 1 and is electrically connected to an external controller. The upper part of the pushing plate 302 is fixedly connected to the output end of the pushing cylinder 301. The upper end of the pushing seat 303 is slidably connected to the inside of the pushing plate 302, and the two sides of the pushing seat 303 are slidably connected to the inside of the mounting frame 1. The upper end of the heating seat 304 is also slidably connected to the inside of the pushing plate 302, and the two sides of the heating seat 304 are slidably connected to the inside of the mounting frame 1. The lifting block 305 is fixedly connected to the upper part of the pushing plate 302 and cooperates with the lifting block 405.

[0066] The pusher cylinder 301 is activated and extends to move the pusher plate 302. Then the pusher plate 302 first squeezes the pusher seat 303, causing the pusher seat 303 to push the heat sink 5 inside the storage box 207 to the outer edge of the pipe 6. Then the pusher cylinder 301 stops, thus completing the docking of the heat sink 5 and the pipe 6.

[0067] After the solder paste is added in the paste filling section 4, the pusher cylinder 301 continues to extend and pushes the heating seat 304 to the welding point of the heat sink 5 and the pipe 6 through the pusher plate 302. The heating seat 304 heats the solder paste at the welding point of the heat sink 5 and the pipe 6, thereby welding the heat sink 5 and the pipe 6.

[0068] The upper inclined surface of the lifting block 305 cooperates with the lower inclined surface of the lifting block 405. When the lifting block 305 presses against the inclined surface of the lifting block 405, the lifting block 405 causes the entire paste-filling part 4 to move upward, so that the nozzle of the paste-filling part 4 is away from the heating seat 304, thereby preventing the solder paste inside the nozzle of the paste-filling part 4 from melting and solidifying and clogging the nozzle.

[0069] Please see Figure 6 and Figure 10 As shown, the pusher seat 303 cooperates with the heat sink 5 inside the storage box 207. The storage box 207 stacks the heat sink 5. The movement of the pusher seat 303 drives the heat sink 5 inside the storage box 207 to move upward. At the same time, the mounting frame 1 is equipped with limit blocks and limit springs. The limit blocks and limit springs can fix the storage box 207 to both sides of the mounting frame 1.

[0070] Please see Figure 6 , Figure 7 and Figure 9 As shown, an electric heater is provided at the lower end of the heating base 304. The electric heater is electrically connected to an external controller. The electric heater is set in an arc shape, which makes it fit more closely to the outer edge of the pipe 6 and improves the heating efficiency.

[0071] Please see Figure 2 , Figure 7 and Figure 9 As shown, the push plate 302 has a push groove 3021 and a heating groove 3022 inside. Both the push groove 3021 and the heating groove 3022 have a horizontal stationary section and an inclined extrusion section inside. The push groove 3021 cooperates with the upper end of the pusher seat 303, and the heating groove 3022 cooperates with the upper end of the heating seat 304.

[0072] In the initial state, the pusher seat 303 is in the extrusion section of the push groove 3021, and the heating seat 304 is in the horizontal section of the heating groove 3022. During the process of the pusher cylinder 301 causing the output end to extend the push plate 302, the extrusion section of the push groove 3021 first extrudes the upper end of the pusher seat 303, causing the pusher seat 303 to move inwards towards the mounting bracket 1, pushing the heat sink 5 to the pipe 6. At this time, the heating seat 304 does not move because it is in a stationary state. As the pusher cylinder 301 continues to move, the upper ends of the heating seat 304 and the pusher seat 303 gradually move into the horizontal section of the push groove 3021 and the heating groove 3022. At the junction of the stationary section and the extrusion section, the pusher cylinder 301 stops moving, and the soldering paste is added to the paste filling section 4. As the pusher cylinder 301 continues to move, the upper end of the pusher seat 303 is inside the stationary section of the pusher groove 3021, and the upper end of the heating seat 304 is inside the extrusion section of the heating groove 3022, causing the heating seat 304 to be extruded and moved. The heating seat 304 moves to the welding point between the pipe 6 and the heat sink 5. Thus, the pusher cylinder 301 drives the extrusion plate 302 to move, thereby realizing the separate movement of the pusher seat 303 and the heating seat 304, achieving the pushing and heating of the heat sink 5.

[0073] Please see Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the lower end of the paste-filling tray 402 is provided with at least three nozzles in a ring around the pipe 6. The nozzles are connected to the external solder paste adding equipment. Through multiple nozzles, the paste-filling tray 402 can be rotated at a small angle to add solder paste to the outer edge of the pipe 6, which can prevent the solder paste conveying pipe 6 from getting tangled due to rotation.

[0074] A welding method for heat sink fins using an automatic welding machine, applied to the aforementioned automatic welding machine, includes the following steps:

[0075] Step 1: Pass one end of pipe 6 through the inside of paste filling tray 402 and fix it inside the discharge seat 203;

[0076] Step 2: Install the storage bins 207 on both sides of the mounting frame 1 to complete the stacking of the heat sinks 5;

[0077] Step 3: Start the pusher cylinder 301 to push the heat sink 5 inside the storage box 207 to the outer edge of the pipe 6 through the pusher seat 303. Then stop the pusher cylinder 301 to complete the feeding.

[0078] Step 4: Using the paste filling tray 402, rotate the soldering paste at the welding joint between the heat sink 5 and the pipe 6 to fill the soldering paste, thus completing the addition of soldering paste.

[0079] Step 5: Then continue to start the pusher cylinder 301 to push the heating seat 304 to the welding point of the heat sink 5 and the pipe 6 through the pusher plate 302, and heat it to melt the solder paste at the welding point of the heat sink 5 and the pipe 6. At the same time, the lifting block 305 on the upper part of the pusher plate 302 squeezes the lifting block 405 to make the paste filling part 4 move upward and away from the heating seat 304.

[0080] Step six: After the welding of the heat sink 5 and the pipe 6 is completed, the pusher cylinder 301 in the pusher part 3 retracts, and the pusher part 3 as a whole returns to the position in step two.

[0081] Step 7: The discharge motor 201 drives the discharge screw 202 to rotate. The rotation of the discharge screw 202 causes the discharge seat 203 to move downward. The discharge seat 203 causes the pipe 6 to move downward. The distance that the discharge seat 203 moves is the distance between the heat sinks 5.

[0082] Step 8: The feeding motor 204 drives the feeding screw 205 to rotate. The feeding screw 205 drives the feeding seat 206 to push the heat sink 5 inside the storage box 207 upward to the top inside the storage box 207, thus completing the feeding of a new heat sink 5.

[0083] The working principle of this invention is as follows: one end of the pipe 6 is passed through the inside of the paste filling tray 402 and fixed inside the discharge seat 203 to complete the installation of the pipe 6. Then, the storage box 207 containing the heat sink 5 is installed on both sides of the mounting frame 1 to complete the installation and stacking of the heat sink 5. The pusher cylinder 301 is started to push the heat sink 5 inside the storage box 207 to the outer edge of the pipe 6 through the pusher seat 303. The pusher cylinder 301 stops to complete the feeding of the heat sink 5.

[0084] Solder paste is applied to the weld joint between the heat sink 5 and the pipe 6 via the paste application tray 402. The output end of the drive push rod 404 drives the drive rack 403 to move, causing the drive rack 403 to rotate the paste application tray 402 that meshes with it. This allows the solder paste to be squeezed out and accumulated along the outer edge of the pipe 6, improving the coverage of the solder paste at the weld joint between the pipe 6 and the heat sink 5 and improving the welding quality.

[0085] Then, the pusher cylinder 301 continues to be activated, and the heating seat 304 is pushed to the welding point of the heat sink 5 and the pipe 6 through the pusher plate 302. The heat is applied to melt the solder paste at the welding point of the heat sink 5 and the pipe 6. At the same time, the lifting block 305 on the upper part of the pusher plate 302 squeezes the lifting block 405 to move the paste filling part 4 upward and away from the heating seat 304, so as to prevent the solder paste inside the paste filling plate 402 from melting and clogging the nozzle.

[0086] After the welding of the heat sink 5 and the pipe 6 is completed, the push cylinder 301 in the push part 3 retracts, the push part 3 is reset as a whole, and at the same time the paste filling part 4 is reset by the pressure of the elastic reset member 406 after the push part 3 is no longer squeezed.

[0087] Then, the discharge motor 201 drives the discharge screw 202 to rotate. The rotation of the discharge screw 202 drives the discharge seat 203 to move downward. The discharge seat 203 drives the pipe 6 with the heat sink 5 welded on it to move downward. The distance that the discharge seat 203 moves is the distance after the heat sink 5 is welded.

[0088] Then, the feeding motor 204 drives the feeding screw 205 to rotate, and the feeding screw 205 drives the feeding seat 206 to push the heat sink 5 inside the storage box 207 upward to the top inside the storage box 207, completing the feeding process of the new heat sink 5 and repeating the feeding process of the pushing cylinder 301. Thus, the welding of the pipe 6 and the heat sink 5 is completed.

[0089] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An automatic welding machine, characterized in that: It includes a mounting frame (1), and a material conveying part (2) is provided at the lower end of the mounting frame (1). The material conveying part (2) is responsible for conveying the heat sink (5) and the pipe (6). The upper part of the mounting bracket (1) is provided with a pusher (3), which cooperates with the conveying part (2). The pusher (3) pushes the heat sink (5) in the welding position to the outer edge of the pipe (6); then the solder paste at the heat sink (5) and the pipe (6) is heated and melted to complete the welding of the pipe (6) and the heat sink (5). The upper part of the pusher (3) is provided with a paste filling part (4). The paste filling part (4) applies the solder paste required for welding to the welding joint between the pipe (6) and the heat sink (5). The paste filling part (4) includes a paste filling seat (401), a paste filling plate (402), a drive rack (403), and a drive push rod (404). The paste filling seat (401) is slidably disposed inside the upper end of the mounting bracket (1). Multiple paste filling plates (402) are provided, and the paste filling plates (402) are rotatably disposed inside the paste filling seat (401). The drive rack (403) is slidably disposed inside the paste filling seat (401), and one side of the drive rack (403) meshes with the outer edge of the paste filling plate (402). The drive push rod (404) is fixedly disposed inside the paste filling seat (401), and the output end of the drive push rod (404) is fixedly connected to one end of the drive rack (403). The paste filling section (4) also includes a lifting block (405), which is fixedly disposed on the upper part of the paste filling seat (401) and cooperates with the pusher section (3); The material conveying unit (2) includes a discharge motor (201), a discharge screw (202), a discharge seat (203), a feeding motor (204), a feeding screw (205), a feeding seat (206), and a storage box (207). The discharge motor (201) is fixedly connected to the lower end inside the mounting frame (1). The discharge screw (202) has two screws, both rotatably mounted inside the lower end of the mounting frame (1). The lower ends of the two discharge screws (202) are connected by a transmission toothed belt. The lower end of one of the discharge screws (202) is fixedly connected to the output end of the discharge motor (201). The discharge seat (203) is located between the two discharge screws (202), and the interior of both ends of the discharge seat (203) is connected to the corresponding discharge screw (202). The feed motor (204) is fixedly connected to the lower end of the mounting frame (1) with an external thread connection. The feed screw (205) is provided with two screws that are rotatably set inside the mounting frame (1). The lower ends of the two feed screws (205) are connected by a transmission toothed belt. The lower end of one of the feed screws (205) is fixedly connected to the output end of the feed motor (204). The feed seat (206) is set between the two feed screws (205), and the interior of both ends of the feed seat (206) is threadedly connected to the outer edge of the corresponding feed screw (205). There are two storage boxes (207), and the storage boxes (207) are set on both sides of the mounting frame (1). The interior of the storage box (207) is matched with the feed seat (206). The pushing part (3) includes a pushing cylinder (301), a pushing plate (302), a pushing seat (303), a heating seat (304), and a lifting block (305). The pushing cylinder (301) is fixedly installed at the upper end inside the mounting frame (1). The upper part of the pushing plate (302) is fixedly connected to the output end of the pushing cylinder (301). The upper end of the pushing seat (303) is slidably connected to the interior of the pushing plate (302). The two sides of the pushing seat (303) are slidably connected to the interior of the mounting frame (1). The upper end of the heating seat (304) is also slidably connected to the interior of the pushing plate (302). The two sides of the heating seat (304) are slidably connected to the interior of the mounting frame (1). The lifting block (305) is fixedly connected to the upper part of the pushing plate (302). The lifting block (305) cooperates with the lifting block (405). The pusher seat (303) is in conjunction with the heat sink (5) inside the storage box (207).

2. The automatic welding machine according to claim 1, characterized in that: The discharge seat (203) is provided with a locking block (2031) and an elastic extrusion member (2032). The locking block (2031) is slidably disposed inside the discharge seat (203). One side of the locking block (2031) is engaged with the outer edge of the pipe (6). The elastic extrusion member (2032) is disposed between the discharge seat (203) and the locking block (2031).

3. An automatic welding machine according to claim 2, characterized in that: One side of the locking block (2031) is arc-shaped, and a rubber pad is provided on the inner side of the arc.

4. An automatic welding machine according to claim 1, characterized in that: The lower end of the heating base (304) is provided with an electric heater, which is configured to be arc-shaped.

5. An automatic welding machine according to claim 1, characterized in that: The push plate (302) has a push groove (3021) and a heating groove (3022) inside. Both the push groove (3021) and the heating groove (3022) have a horizontal stationary section and an inclined extrusion section inside. The inside of the push groove (3021) is matched with the upper end of the pusher seat (303), and the inside of the heating groove (3022) is matched with the upper end of the heating seat (304).

6. An automatic welding machine according to claim 1, characterized in that: The lower end of the paste-filling tray (402) is provided with at least three nozzles in a ring shape with the pipe (6) as the axis.

7. A welding method for heat sink fins using an automatic welding machine, applied to the automatic welding machine of claim 1, comprising the following steps: Step 1: Pass one end of the pipe (6) through the inside of the paste filling tray (402) and fix it inside the discharge seat (203); Step 2: Install the storage box (207) on both sides of the mounting frame (1) to complete the stacking of the heat sink (5); Step 3: Start the pusher cylinder (301) to push the heat sink (5) inside the storage box (207) to the outer edge of the pipe (6) through the pusher seat (303). Then stop the pusher cylinder (301) to complete the feeding. Step 4: Using the paste filling tray (402), rotate and fill the solder paste at the welding joint of the heat sink (5) and the pipe (6) to complete the addition of solder paste; Step 5: Then continue to start the pusher cylinder (301) to push the heating seat (304) to the welding joint of the heat sink (5) and the pipe (6) through the pusher plate (302) to heat and melt the solder paste at the welding joint of the heat sink (5) and the pipe (6). At the same time, the lifting block (305) on the upper part of the pusher plate (302) squeezes the lifting block (405) to make the paste filling part (4) move upward and away from the heating seat (304). Step six: After the welding of the heat sink (5) and the pipe (6) is completed, the push cylinder (301) in the push part (3) retracts and the push part (3) is reset to the position in step two. Step 7: Drive the discharge screw (202) to rotate by the discharge motor (201). The rotation of the discharge screw (202) drives the discharge seat (203) to move downward. The discharge seat (203) drives the pipe (6) to move downward. The distance that the discharge seat (203) moves is the distance between the heat sinks (5). Step 8: Drive the feeding screw (205) to rotate by the feeding motor (204). The feeding screw (205) drives the feeding seat (206) to push the heat sink (5) inside the storage box (207) upward to the top inside the storage box (207), thus completing the feeding of the new heat sink (5).

Images