Chip-type heat sink welding device and welding method

Abstract

This invention relates to a welding apparatus and method for a plate-type radiator, comprising a fixing frame and a lifting mechanism; a flipping mechanism is disposed between two lifting mechanisms; the flipping mechanism includes a clamping and positioning unit and a rotating positioning unit; the flipping mechanism includes a rotating cylinder; the clamping and positioning unit can extend and retract relative to the rotating cylinder to pre-position or clamp and position the radiator fins; the rotating positioning unit can rotate circumferentially relative to the rotating cylinder, and the rotating positioning unit includes clamping heads that clamp the oil collection pipe from the left and right, so that while the clamping and positioning unit clamps and positions the radiator fins, the radiator fins are also clamped through the oil collection pipe; the welding assembly includes a position-adjustable welding head; the welding head can be aligned with the contact position between the radiator fins and the oil collection pipe in the optimal posture for welding, thereby improving welding quality and reducing operation difficulty; the radiator fins are simultaneously subjected to direct clamping from the clamping and positioning unit and lateral clamping from the oil collection pipe, forming dual positioning and improving welding stability.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to a welding device and welding method for plate-type heat sinks. Background Technology

[0002] Oil-immersed transformers generate a large amount of heat during operation. To effectively control the temperature rise of the transformer, a plate-type radiator is usually installed on the transformer. By increasing the contact area between the transformer tank and the outside air, heat transfer is accelerated, and the internal heat is quickly dissipated to the external environment, thereby reducing the operating temperature of the transformer.

[0003] The plate-type radiator mainly consists of multiple plate-shaped heat dissipation fins and oil collection pipes welded and fixed to both ends of the heat dissipation fins. The heat dissipation fins and oil collection pipes are interconnected. At present, the connection between the heat dissipation fins and the oil collection pipes is mostly done by manual welding. However, this method has the following shortcomings: (1) Unstable welding quality: manual operation is prone to welding defects, affecting the reliability of the connection; (2) High labor intensity: operators need to maintain a fixed posture for a long time, which can easily cause fatigue, thereby reducing welding efficiency and welding quality; (3) High operation difficulty: during the welding process, operators often need to carry the welding gun back and forth or flip the heat dissipation fins to adjust the welding angle and position, which increases the construction difficulty and operation inconvenience. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a welding device and welding method for plate heat sinks, so as to solve the technical problem that operators have to carry the welding gun back and forth or flip the heat sink when welding plate heat sinks, which makes the construction difficult.

[0005] To achieve the above objectives, the technical solution adopted by the welding device for plate-type heat sinks of the present invention is as follows: A plate-type heat sink welding device, comprising, The fixed frame includes two guide support columns extending in the vertical direction and a base plate fixedly connected to the bottom of the two guide support columns; The lifting mechanism is provided in two sets, and the two sets of lifting mechanisms are correspondingly installed in the guide support columns; A tilting mechanism is installed between the two lifting mechanisms, and the tilting mechanism is rotated relative to the lifting mechanisms. The flipping mechanism includes a clamping and positioning unit and a rotary positioning unit; The tilting mechanism includes a rotating drum that is rotatably mounted relative to the lifting mechanism, with the axis of the rotating drum extending in the left-right direction; The clamping and positioning unit can extend and retract relative to the rotating cylinder to pre-position or clamp the heat sink. The rotary positioning unit is circumferentially rotatable relative to the rotating drum. The rotary positioning unit includes clamping heads that clamp the oil collection pipe on the left and right sides. While the clamping positioning unit clamps and positions the heat sink, the rotary positioning unit clamps the oil collection pipe and rotates it to the docking point with the heat sink, and clamps the heat sink through the oil collection pipe. When the rotary positioning unit rotates to be parallel with the clamping positioning unit, it is easy to place the heat sink in the clamping positioning unit for pre-positioning; When the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, it is convenient for the clamping positioning unit and the rotary positioning unit to clamp and position the heat sink at the same time. The welding assembly includes a welding head that can be adjusted in the left and right position relative to the guide support column.

[0006] Beneficial effects: (1) The lifting mechanism achieves height self-adaptation and improves welding compatibility; The present invention includes two sets of lifting mechanisms set with corresponding guide support columns. The lifting mechanism can drive the flipping mechanism to move up and down along the guide support column, so that the flipping mechanism can flexibly adapt to the height of the welding components, ensuring that the relative position between the welding head and the part to be welded is more accurate, and effectively improving the compatibility of the equipment with heat sinks of different specifications; (2) The tilting mechanism is adjustable in angle, which optimizes welding accessibility; the tilting mechanism is rotated relative to the lifting mechanism. By tilting the entire mechanism, the spatial angle of the positioned heat sink and oil collection pipe can be adjusted relative to the welding head, so that the welding head can be aligned with the contact position of the heat sink and oil collection pipe in the best posture for welding, thereby improving the welding quality and reducing the difficulty of operation; (3) Clamping and rotation positioning work together to achieve double clamping; the flipping mechanism also includes a clamping and positioning unit and a rotation positioning unit. Among them: the clamping and positioning unit can extend and retract relative to the rotating cylinder to pre-position or clamp the heat sink; the rotation positioning unit can rotate circumferentially relative to the rotating cylinder. While the clamping and positioning unit clamps and positions the heat sink, the rotation positioning unit clamps the oil collection pipe and rotates it to the docking position with the heat sink, and applies clamping force to the heat sink through the oil collection pipe; thus, the heat sink is simultaneously subjected to direct clamping from the clamping and positioning unit and lateral clamping from the oil collection pipe, forming double positioning, which significantly improves the assembly stability during the welding process; (4) The two working states of the rotary positioning unit take into account both the convenience of loading and unloading and the requirements of welding clamping. When the rotary positioning unit rotates to be parallel with the clamping positioning unit, the space is open, which makes it easy to place the heat sink on the clamping positioning unit for pre-positioning, or to facilitate the disassembly of the welded plate heat sink, which is convenient for loading and unloading operations. When the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, the clamping positioning unit and the rotary positioning unit apply clamping force to the heat sink from the top and bottom and left and right directions respectively, to achieve multi-directional coordinated clamping and ensure that the heat sink and the oil collection pipe maintain a precise relative position during the welding process.

[0007] Furthermore, two rotating cylinders are provided, each corresponding to a lifting mechanism. Each rotating cylinder includes a first circular plate, a second circular plate, and a third circular plate arranged sequentially away from the guide support column. The first, second, and third circular plates are fixed relative to each other by the cylinder wall. The first and second circular plates are spaced apart to form a first chamber, and the second and third circular plates are spaced apart to form a second chamber. Each rotating cylinder includes a first rotating shaft that rotates relative to the first, second, and third circular plates, and the first rotating shaft is located at the axis of the rotating cylinder. Each rotating cylinder also includes a second rotating shaft that rotates relative to the first, second, and third circular plates, and the second rotating shaft is eccentrically positioned relative to the axis of the rotating cylinder. A third sleeve is rotatably disposed in the first chamber, and the third sleeve is coaxially disposed with the first rotating shaft and sleeved on the first rotating shaft. The rotation positioning unit is disposed in the first chamber, and the clamping positioning unit is disposed in the second chamber.

[0008] Beneficial effects: The structure of the rotating drum (1) improves structural strength and ensures equipment stability; the rotating drum adopts a structure that separates the first chamber and the second chamber, which makes it have high resistance to bending and torsion when bearing the installation load and motion load of the rotating positioning unit and the clamping positioning unit, thereby ensuring the overall structural strength and meeting the requirements of rigidity and stability for long-term, high-frequency welding operations; (2) clear functional zoning and no interference between them; by setting the rotating positioning unit in the first chamber and the clamping positioning unit in the second chamber, the physical isolation and spatial zoning of the two functional units are realized. This design not only avoids mechanical interference between moving parts, but also simplifies the process of independent assembly and maintenance, effectively improving the reliability and maintainability of the system operation.

[0009] Furthermore, the clamping and positioning unit includes a first gear fixed on a first rotating shaft and a second gear fixed on a second rotating shaft. The first gear and the second gear mesh and drive each other. The clamping and positioning unit also includes an adjusting disk fixed on the first rotating shaft and a guide rail fixed on a third disk. The guide rail extends radially along the third disk. A guide rod is slidably arranged in the guide rail. An adjusting mechanism is provided between the guide rod and the adjusting disk. When the adjusting disk rotates, the adjusting mechanism drives the guide rod to slide relative to the guide rail. An avoidance hole is provided on the rotating cylinder to avoid the guide rod.

[0010] Beneficial effects: Power is input through the second rotating shaft, which drives the first gear to rotate. The first gear meshes with the second gear, thereby transmitting power to the first rotating shaft. The first rotating shaft drives the adjustment plate to rotate, and the arc-shaped guide groove on the adjustment plate forces the guide block to move along the guide rail, thereby driving the guide rod to slide precisely up and down relative to the guide rail. The transmission design achieves the following technical advantages: (1) Efficient and reliable power transmission; the gear meshing transmission method is adopted, the transmission ratio is accurate, there is no slippage loss, and the rotational motion of the first rotating shaft can be stably converted into the linear reciprocating motion of the guide rod; (2) Smooth motion conversion; through the cooperation of the adjustment plate and the arc-shaped guide groove, the rotational motion is converted into the up and down sliding of the guide rod, the structure is compact, and the action is continuous; (3) Simple control; only the first rotating shaft needs to be driven to control the clamping and releasing action of the clamping and positioning unit, without the need for an additional independent power source or a complex control system.

[0011] Furthermore, the adjustment mechanism includes an arc-shaped guide groove on the adjustment plate and a guide block fixed to the lower end of the guide rod. The guide block is slidably adapted to the arc-shaped guide groove. There are two guide rails, which are symmetrically arranged about the second axis of rotation. The adjustment mechanism has two sets of guide rails.

[0012] Beneficial effects: When the adjusting disc rotates, the arc-shaped guide groove drives the guide block to slide along the track of the guide groove through its curved contour. Since the guide block is fixedly connected to the guide rod, and the guide rod is constrained by the linearity of the guide rail, the sliding motion of the guide block is converted into the linear reciprocating movement of the guide rod along the extension direction of the guide rail.

[0013] Furthermore, a positioning plate is fixed to the end of the guide rod away from the first rotating shaft. The positioning plate includes partition plates fixedly arranged relative to the positioning plate along its extension direction. Adjacent partition plates form positioning grooves for placing heat sinks. The positioning plate includes a first positioning plate and a second positioning plate respectively arranged corresponding to the two guide rods of the same rotating cylinder.

[0014] Beneficial effects: The first and second positioning plates are respectively fixedly installed on the ends of two guide rods away from the first rotating shaft. Driven by the adjusting mechanism, the two guide rods synchronously move closer or further apart, thereby causing the first and second positioning plates to move synchronously towards or away from each other. When the two guide rods move towards each other, the first and second positioning plates synchronously clamp the heat sink located between them, achieving rapid and uniform positioning; when the guide rods move away from each other, the two positioning plates synchronously release the heat sink.

[0015] The rotary positioning unit includes a third gear fixed on the third sleeve and a fourth gear fixed on the second rotating shaft. The third gear and the fourth gear mesh and drive each other. A linear telescopic mechanism that extends and retracts radially along the third sleeve is fixed on the third sleeve. The clamping head is fixed to the telescopic end of the linear telescopic mechanism. An arc-shaped groove is provided on the rotating cylinder to avoid the rotation of the linear telescopic mechanism.

[0016] Beneficial effects: The second rotating shaft provides synchronous drive, achieving coordinated movement. The second rotating shaft simultaneously drives the second and fourth gears to rotate: on one hand, the second gear meshes with the first gear, driving the clamping and positioning unit; on the other hand, the fourth gear meshes with the third gear, driving the rotary positioning unit. By inputting power through the same rotating shaft, the movements of the two functional units remain synchronized in timing and rhythm, eliminating the need for additional control and coordination. This achieves mechanical coordination between the clamping and positioning unit and the rotary positioning unit, simplifying the transmission system structure, reducing control complexity, and improving the consistency and reliability of the movements.

[0017] The lifting mechanism includes a rectangular hollow column that is slidably disposed in a guide support column. The rotating drum is rotatably disposed on the rectangular hollow column. A hydraulic telescopic rod is fixed at the bottom of the guide support column. The hydraulic telescopic rod is located inside the rectangular hollow column. A sprocket is rotatably disposed at the top of the telescopic end of the hydraulic telescopic rod. The sprocket is adapted to a chain. One end of the chain is fixed to the bottom of the guide support column, and the other end is fixed to the rectangular hollow column.

[0018] Beneficial effects: The extension and retraction of the hydraulic telescopic rod drives the sprocket to move vertically up and down. When the hydraulic telescopic rod extends, the sprocket rises and engages with the chain; as the sprocket continues to rise, since one end of the chain is fixed, the rectangular hollow column connected to the chain end is simultaneously lifted by the sprocket's pushing action. Conversely, when the hydraulic telescopic rod retracts, the sprocket descends, and the rectangular hollow column descends accordingly. Only one hydraulic telescopic rod is needed to simultaneously control the engagement of the sprocket and chain and drive the lifting and lowering of the rectangular hollow column, eliminating the need for an additional motor or reduction gear mechanism.

[0019] Furthermore, the top of the guide support column is provided with a reversing wheel, and also includes a fall arresting rope wrapped around the reversing wheel. One end of the fall arresting rope is fixed to the rectangular hollow column, and the other end of the fall arresting rope is wound around a winch located at the bottom of the guide support column.

[0020] Beneficial effects: One end of the fall arrestor rope is fixedly connected to a rectangular hollow column, and the other end is fixedly connected to the equipment's fixed frame or foundation. Under normal working conditions, the fall arrestor rope is in a slack or non-tensile state, which does not affect the normal operation of the lifting mechanism.

[0021] When the chain suddenly breaks due to fatigue, overload, or other reasons, the rectangular hollow column loses its upward tension and will fall downwards under the influence of gravity. At this moment, the safety rope is instantly tightened and directly bears the weight of the rectangular hollow column and the connected rotating mechanism through its own tensile strength, thereby effectively preventing the rectangular hollow column from continuing to fall and preventing the rotating mechanism from falling unexpectedly.

[0022] The welding assembly includes a lead screw and a fixed rod rotatably disposed between two guide support columns. The lead screw is threaded with a nut, which slides relative to the fixed rod. The welding head is fixed on the nut.

[0023] Beneficial effects: The welding assembly is rotated by a lead screw, the nut is threaded and matched with the lead screw, and the nut slides relative to the fixed rod, so the position of the welding head relative to the lead screw can be adjusted by rotating the lead screw.

[0024] A method for welding a plate-type heat sink includes the following steps: S1: Adjust the rotary positioning unit so that the guide rails of both the linear telescopic mechanism and the clamping positioning unit extend in the vertical direction. S2: Place heat sinks between the first positioning plate and the second positioning plate in sequence, so that the first positioning plate and the second positioning plate are pre-positioned with the heat sinks; S3: Place the oil collection pipe between the two corresponding clamping heads on the left and right, and make the clamping heads clamp the oil collection pipe; S4: Rotate the first shaft counterclockwise, which simultaneously drives the first gear and the third gear to rotate; The first gear meshes with the second gear, causing the second rotating shaft to rotate clockwise. The second rotating shaft drives the adjusting plate to rotate clockwise. The arc-shaped guide groove on the adjusting plate forces the guide block to move along the guide rail toward the second rotating shaft, causing the guide rod to move along the guide rail toward the first rotating shaft, so that the first positioning plate and the second positioning plate can clamp the heat sink synchronously. At the same time, the third gear meshes with the fourth gear, causing the fourth gear to rotate clockwise. The fourth gear causes the third sleeve to rotate clockwise, and the third sleeve causes the two linear telescopic mechanisms to rotate. When the two linear telescopic mechanisms rotate clockwise, they retract under the action of their own driving structure. When the first positioning plate and the second positioning plate clamp the heat sink from top to bottom, the two oil collection pipes clamp the heat sink from left to right. S5: Rotate the flipping mechanism to adjust the direction of the heat sink so that the part of the heat sink that connects with the oil collection pipe faces upward. At this time, the two oil collection pipes are located on the upper and lower sides of the heat sink, and the first positioning plate and the second positioning plate are located on the front and rear sides of the heat sink, respectively. S6: Adjust the position of the welding head so that it is aligned with the contact position between the oil collection pipe and the heat sink. Then rotate the flipping mechanism to adjust the angle of the heat sink so that the welding head can weld the contact position. S7: Adjust the position of the welding head sequentially, and rotate the flipping mechanism after each adjustment so that the welding head welds the contact positions of each heat sink and oil collection pipe in sequence. S8: After both oil collection pipes are welded to each heat sink, rotate the flipping mechanism to adjust the direction of the heat sink so that the two oil collection pipes are located on the front and rear sides of the heat sink, and the first positioning plate and the second positioning plate are located on the upper and lower sides of the heat sink respectively. S9: Releases the clamping head from the oil collection pipe; S10: Rotate the first shaft clockwise, which simultaneously drives the first gear and the third gear to rotate; The first gear meshes with the second gear, thereby driving the second rotating shaft to rotate counterclockwise. The second rotating shaft drives the adjusting plate to rotate counterclockwise. The arc-shaped guide groove on the adjusting plate forces the guide block to move away from the second rotating shaft along the guide rail. The guide rod then moves away from the second rotating shaft along the guide rail, so that the first positioning plate and the second positioning plate can release the heat sink at the same time. At the same time, the third gear meshes with the fourth gear, causing the fourth gear to rotate counterclockwise. The fourth gear causes the third sleeve to rotate counterclockwise, and the third sleeve causes the two linear telescopic mechanisms to rotate. When the two linear telescopic mechanisms rotate counterclockwise, they extend under the action of their own driving structure. When the first and second positioning plates release the heat sink, the guide rails of the linear telescopic mechanism and the clamping positioning unit extend in the vertical direction to remove the welded heat sink and oil collection pipe.

[0025] Beneficial effects: The plate heat sink welding method of the present invention (1) The lifting mechanism realizes height self-adaptation and improves welding compatibility; The present invention includes two sets of lifting mechanisms set with corresponding guide support columns. The lifting mechanism can drive the flipping mechanism to move up and down along the guide support column, so that the flipping mechanism can flexibly adapt to the height of the welding components, ensuring that the relative position between the welding head and the part to be welded is more accurate, and effectively improving the compatibility of the equipment with heat sinks of different specifications; (2) The tilting mechanism is adjustable in angle, which optimizes welding accessibility; the tilting mechanism is rotated relative to the lifting mechanism. By tilting the entire mechanism, the spatial angle of the positioned heat sink and oil collection pipe can be adjusted relative to the welding head, so that the welding head can be aligned with the contact position of the heat sink and oil collection pipe in the best posture for welding, thereby improving the welding quality and reducing the difficulty of operation; (3) Clamping and rotation positioning work together to achieve double clamping; the flipping mechanism also includes a clamping and positioning unit and a rotation positioning unit. Among them: the clamping and positioning unit can extend and retract relative to the rotating cylinder to pre-position or clamp the heat sink; the rotation positioning unit can rotate circumferentially relative to the rotating cylinder. While the clamping and positioning unit clamps and positions the heat sink, the rotation positioning unit clamps the oil collection pipe and rotates it to the docking position with the heat sink, and applies clamping force to the heat sink through the oil collection pipe; thus, the heat sink is simultaneously subjected to direct clamping from the clamping and positioning unit and lateral clamping from the oil collection pipe, forming double positioning, which significantly improves the assembly stability during the welding process; (4) The two working states of the rotary positioning unit take into account both the convenience of loading and unloading and the requirements of welding clamping. When the rotary positioning unit rotates to be parallel with the clamping positioning unit, the space is open, which makes it easy to place the heat sink on the clamping positioning unit for pre-positioning, or to facilitate the disassembly of the welded plate heat sink, which is convenient for loading and unloading operations. When the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, the clamping positioning unit and the rotary positioning unit apply clamping force to the heat sink from the top and bottom and left and right directions respectively, to achieve multi-directional coordinated clamping and ensure that the heat sink and the oil collection pipe maintain a precise relative position during the welding process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a plate heat sink welding device according to the present invention; Figure 2 yes Figure 1 Another structural schematic diagram of a plate-type heat sink welding device; Figure 3 yes Figure 1 A schematic diagram of the structure of a tilting mechanism in one working state; Figure 4 yes Figure 1 A schematic diagram of another working state of the tilting mechanism; Figure 5 yes Figure 3 A magnified view of the middle tilting mechanism in its corresponding working state; Figure 6 yes Figure 4 A magnified view of the middle tilting mechanism in its corresponding working state; Figure 7 yes Figure 3 A schematic diagram of the adjusting disc when the central tilting mechanism is in the corresponding working state; Figure 8 yes Figure 4 A schematic diagram of the adjusting disc when the central tilting mechanism is in the corresponding working state; Figure 9 yes Figure 1 A schematic diagram of a portion of the rotating cylinder of a welding device for plate-type heat sinks.

[0027] Reference numerals: 1-Guide support column; 2-Base plate; 3-Sprocket; 4-Chain; 5-Rectangular hollow column; 6-Screw; 7-Fixing rod; 8-Guide seat; 9-Reversing wheel; 10-First drive motor; 11-First drive gear; 12-Second drive gear; 13-Rotating drum; 14-Linear telescopic mechanism; 15-Clamping head; 16-Oil collection pipe; 17-Positioning plate; 18-Heat sink; 19-First circular plate; 20-Second circular plate; 21-Third circular plate Plate; 22-First gear; 23-Second gear; 24-Guide rail; 25-Divider plate; 26-Anti-fall rope; 27-Third sleeve; 28-Second rotating shaft; 29-First rotating shaft; 30-Mounting plate; 31-Rotating shaft; 32-Third drive gear; 33-Fourth drive gear; 34-Third gear; 35-Fourth gear; 36-Adjusting disc; 37-Guide rod; 38-Guide block; 39-Arc-shaped guide groove; 40-Arc-shaped groove; 41-Allowing hole. Detailed Implementation

[0028] The following is a detailed description of a plate-type heat sink welding device according to the present invention, with reference to the accompanying drawings and specific embodiments: like Figures 1-2 As shown, the finned radiator welding device includes a fixed frame on the ground. The fixed frame includes two guide support columns 1 extending in the vertical direction and a base plate 2 fixedly connected to the bottom of the two guide support columns 1. In this embodiment, the guide support column 1 has a U-shaped cross-section, and the openings of the two guide support columns 1 are arranged opposite each other. A lifting mechanism is correspondingly provided in the guide support column 1. In this embodiment, two sets of lifting mechanisms are provided, and the two sets of lifting mechanisms lift synchronously.

[0029] In this embodiment, the lifting mechanism includes a rectangular hollow column 5 that is guided and slidably disposed in a guide support column 1. A hydraulic telescopic rod is fixed to the bottom of the guide support column 1 and is located inside the rectangular hollow column 5. A sprocket 3 is rotatably disposed at the telescopic end of the hydraulic telescopic rod. The sprocket 3 is meshed with a chain 4. One end of the chain 4 is fixed to the bottom of the guide support column 1, and the other end is fixed to the rectangular hollow column 5. In this embodiment, the hydraulic telescopic rods in the two sets of lifting mechanisms adopt a synchronous telescopic design (e.g., synchronous telescopic extension and retraction is achieved through a flow diversion valve). The telescopic action of the hydraulic telescopic rod drives the sprocket 3 to move up and down in the vertical direction. When the hydraulic telescopic rod extends, the sprocket 3 rises and meshes with the chain 4 for transmission. As the sprocket 3 continues to rise, since one end of the chain 4 is fixed, after the chain 4 passes around the sprocket 3, the rectangular hollow column 5 connected to its end is synchronously lifted under the pushing action of the sprocket 3. Conversely, when the hydraulic telescopic rod retracts, the sprocket 3 descends, and the rectangular hollow column 5 descends accordingly.

[0030] A reversing wheel 9 is installed at the top of the guide support column 1, and a fall arrestor rope 26 is also included, which is wrapped around the reversing wheel 9. One end of the fall arrestor rope 26 is fixed to the rectangular hollow column 5, and the other end is wound around a winch located at the bottom of the guide support column 1. Under normal working conditions, the fall arrestor rope 26 is in a slack or unloaded state, which does not affect the normal operation of the lifting mechanism. When the chain 4 suddenly breaks due to fatigue, overload, or other reasons, the rectangular hollow column 5 loses its upward tension support and will fall downward under the action of gravity. At this time, the fall arrestor rope 26 is instantly tightened and directly bears the weight of the rectangular hollow column 5 and the rotating mechanism connected to it through its own tensile strength, thereby effectively preventing the rectangular hollow column 5 from continuing to fall and preventing the rotating mechanism from falling unexpectedly.

[0031] A tilting mechanism is provided between the two lifting mechanisms, and the tilting mechanism is rotatable relative to the lifting mechanisms. For example... Figures 3-5 As shown, the tilting mechanism includes two rotating cylinders 13 that are rotatably disposed relative to the lifting mechanism. Specifically, each rotating cylinder 13 is rotatably disposed on a rectangular hollow column 5, with the two cylinders 13 positioned left and right respectively, and their axes extending in the left-right direction. In this embodiment, a rotating shaft 31 is fixedly disposed on the rotating cylinder 13, and the rotating shaft 31 is rotatably disposed on the rectangular hollow column 5. To drive the rotating shaft 31 to rotate, a mounting plate 30 is fixedly disposed on the rectangular hollow column 5. The rotating shaft 31 is rotatably disposed relative to the mounting plate 30. A first drive motor 10 is fixedly disposed on one side of the mounting plate 30. A first drive gear 11 is fixedly disposed on the output shaft of the first drive motor 10, and a second drive gear 12 is fixedly disposed on the rotating shaft 31. The first drive gear 11 and the second drive gear 12 mesh and transmit power.

[0032] The flipping mechanism includes a clamping and positioning unit and a rotating positioning unit. The clamping and positioning unit can extend and retract relative to the rotating cylinder 13 to pre-position or clamp the heat sink 18. The rotating positioning unit can rotate circumferentially relative to the rotating cylinder 13. The rotating positioning unit includes clamping heads 15 that clamp the oil collection pipe 16 from left to right. While the clamping and positioning unit clamps and positions the heat sink 18, the rotating positioning unit clamps the oil collection pipe 16 and rotates it to the point where it connects with the heat sink 18, thus clamping the heat sink 18 through the oil collection pipe 16.

[0033] The rotating drum 13 includes a first circular plate 19, a second circular plate 20, and a third circular plate 21 arranged sequentially away from the guide support column 1. The first circular plate 19, the second circular plate 20, and the third circular plate 21 are fixed relative to each other by the drum wall. The first circular plate 19 and the second circular plate 20 are spaced apart to form a first chamber, and the second circular plate 20 and the third circular plate 21 are spaced apart to form a second chamber. The rotating drum 13 includes a first rotating shaft 29 rotatably arranged relative to the first circular plate 19, the second circular plate 20, and the third circular plate 21, and the first rotating shaft 29 is located at the axis of the rotating drum 13. The rotating drum 13 also includes a second rotating shaft 28 rotatably arranged relative to the first circular plate 19, the second circular plate 20, and the third circular plate 21. The second rotating shaft is eccentrically positioned relative to the axis of the rotating drum, and is located on the side of the rotating drum without the arc groove 40, to avoid interference of the second rotating shaft 28 with the rotation of the linear telescopic mechanism. A third sleeve 27 is rotatably disposed in the first chamber. The third sleeve 27 is coaxially disposed with the first rotating shaft 29 and is sleeved on the first rotating shaft 29. Furthermore, the third sleeve is sandwiched between the first circular plate and the second circular plate, and is rotatably disposed relative to the first circular plate and the second circular plate, so that the first circular plate and the second circular plate axially limit the third sleeve and prevent the third sleeve from moving axially along the first rotating shaft when rotating. A rotary positioning unit is disposed in the first chamber, and a clamping positioning unit is disposed in the second chamber.

[0034] The structural design of the rotary drum 13 serves two main purposes. First, it enhances structural strength and ensures equipment stability. The rotary drum 13 employs a structure separating the first and second chambers, giving it high resistance to bending and torsion when bearing the installation and motion loads of the rotary positioning unit and the clamping positioning unit. This ensures overall structural strength and meets the rigidity and stability requirements of long-term, high-frequency welding operations. Second, it clearly defines functional zones, preventing interference between them. By placing the rotary positioning unit in the first chamber and the clamping positioning unit in the second chamber, physical isolation and spatial partitioning of the two functional units are achieved. This design not only avoids mechanical interference between moving parts but also simplifies the independent assembly and maintenance processes, effectively improving the reliability and maintainability of the system.

[0035] The clamping and positioning unit includes a first gear 22 fixed on a first rotating shaft 29 and a second gear 23 fixed on a second rotating shaft 28. The first gear 22 and the second gear 23 mesh and transmit power. The clamping and positioning unit also includes an adjusting disk 36 fixed on the first rotating shaft 29 and a guide rail 24 fixed on a third disk. The guide rail 24 extends radially along the third disk. Specifically, two guide rails 24 are provided on the same third disk. The two guide rails 24 are symmetrically arranged about the first rotating shaft 29, and the ends of the two guide rails 24 facing the first rotating shaft 29 are spaced apart from the first rotating shaft 29 to avoid the guide rails 24 affecting the rotation of the first rotating shaft. A guide rod 37 is slidably arranged in the guide rail 24, and an adjusting mechanism is provided between the guide rod 37 and the adjusting disk 36. When the adjusting disk 36 rotates, the adjusting mechanism drives the guide rod 37 to slide relative to the guide rail 24. Figure 9 As shown, the rotating drum 13 has a clearance hole 41 for the clearance guide rod 37.

[0036] like Figures 7-8 As shown, the adjustment mechanism includes an arc-shaped guide groove 39 on the adjustment plate 36 and a guide block 38 fixed to the lower end of the guide rod 37. The guide block 38 is adapted to slide with the arc-shaped guide groove 39. The adjustment mechanism is provided with two sets of guide rails 24.

[0037] A positioning plate 17 is fixed to one end of the guide rod 37 away from the first rotating shaft 29. The positioning plate 17 includes partition plates 25 fixedly arranged relative to the positioning plate along its extension direction. Adjacent partition plates 25 form positioning grooves for placing heat sinks 18. The positioning plate 17 includes a first positioning plate and a second positioning plate respectively arranged corresponding to the two guide rods 37 of the same rotating cylinder 13.

[0038] The rotary positioning unit includes a third gear 34 fixed on the third sleeve 27 and a fourth gear 35 fixed on the second rotating shaft 28. The third gear 34 and the fourth gear 35 mesh and drive each other. A linear telescopic mechanism 14 that extends and retracts radially along the third sleeve 27 is fixed on the third sleeve 27. The clamping head 15 is fixed to the telescopic end of the linear telescopic mechanism 14. Figure 9As shown, the rotating cylinder 13 has an arc-shaped groove 40 to avoid the rotation of the linear telescopic mechanism 14. In this embodiment, the central angle of the arc-shaped groove 40 is 90 degrees, which ensures that when the linear telescopic mechanism 14 is at the end of the arc-shaped groove 40, the linear telescopic mechanism 14 extends in the vertical or horizontal direction. In this embodiment, two linear telescopic mechanisms 14 are fixed on each third sleeve 27, and the two linear telescopic mechanisms 14 are symmetrically arranged relative to the third sleeve 27. Each linear telescopic mechanism 14 includes a fixed cylinder fixed on the third sleeve 27. A lead screw is rotatably arranged in the fixed cylinder. The lead screw includes a threaded section and a smooth rod section located at both ends of the threaded section. A fifth drive gear is fixedly arranged on the smooth rod section. A third drive motor (not shown in the figure) is fixedly arranged on the fixed cylinder. A sixth drive gear is fixedly arranged at the output end of the third drive motor. The sixth drive gear meshes with the fifth drive gear. A nut is threaded onto the threaded section of the lead screw. The nut is guided relative to the fixed cylinder. A telescopic cylinder is fixedly arranged on the nut. A circular hole for the telescopic cylinder to extend is provided at the end of the fixed cylinder. The center of the circular hole is offset from the axis of the lead screw. In this embodiment, the clamping head 15 extends axially in the left-right direction and can extend and retract in the left-right direction, such as a hydraulic telescopic rod. The structure and working principle of the clamping head 15 are existing technologies and will not be described in detail here.

[0039] The second rotating shaft 28 simultaneously drives the second gear 23 and the fourth gear 35 to rotate: on one hand, the second gear 23 meshes with the first gear 22 to drive the clamping and positioning unit; on the other hand, the fourth gear 35 meshes with the third gear 34 to drive the rotary positioning unit. By inputting power through the same rotating shaft, the movements of the two functional units are synchronized in timing and rhythm, without the need for additional control coordination. This achieves mechanical cooperation between the clamping and positioning unit and the rotary positioning unit, simplifies the transmission system structure, reduces control complexity, and improves the consistency and reliability of the movements.

[0040] To facilitate the rotation of the second rotating shaft, in this embodiment, a second drive motor is fixedly mounted on the first disc, a third drive gear 32 is fixedly mounted on the output end of the second drive motor, and a fourth drive gear 33 is fixedly mounted on the second rotating shaft 28. The third drive gear 32 and the fourth drive gear 33 mesh and transmit power. In this embodiment, the two second drive motors located on the left and right sides of the fixed frame are synchronous motors to facilitate synchronous driving of the second rotating shafts located on the left and right sides of the fixed frame.

[0041] A welding assembly is also provided on the fixing frame. The welding assembly includes a welding head (not shown in the figure) that can be adjusted in the left and right position relative to the guide support column 1. The welding assembly also includes a lead screw 6 rotatably disposed between the two guide support columns 1 and a fixing rod 7 fixedly disposed between the two guide support columns 1. The lead screw 6 is threadedly adapted to a guide seat 8, and the guide seat 8 slides relative to the fixing rod 7. The welding head is fixed on the guide seat 8. In this embodiment, the structure and principle of the welding head are existing technologies and will not be described in detail here.

[0042] In this invention, when the rotary positioning unit rotates to be parallel to the clamping positioning unit, it is convenient to place the heat sink 18 in the clamping positioning unit for pre-positioning; when the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, it is convenient for the clamping positioning unit and the rotary positioning unit to clamp and position the heat sink 18 simultaneously.

[0043] The advantages of the finned heat sink welding device of the present invention include: (1) The lifting mechanism achieves height self-adaptation and improves welding compatibility; The present invention includes two sets of lifting mechanisms corresponding to the guide support column 1. The lifting mechanism can drive the flipping mechanism to move up and down along the guide support column 1, so that the flipping mechanism can flexibly adapt to the height of the welding component, ensuring that the relative position between the welding head and the part to be welded is more accurate, and effectively improving the compatibility of the equipment with heat sinks 18 of different specifications; (2) The flipping mechanism enables adjustable angle and optimizes welding accessibility; the flipping mechanism is rotated relative to the lifting mechanism. By flipping the entire mechanism, the spatial angle of the positioned heat sink 18 and oil collection pipe 16 can be adjusted relative to the welding head, so that the welding head can be aligned with the contact position of the heat sink 18 and oil collection pipe 16 in the best posture for welding, thereby improving welding quality and reducing operation difficulty; (3) Clamping and rotation positioning work together to achieve double clamping; the flipping mechanism also includes a clamping and positioning unit and a rotation positioning unit. Among them: the clamping and positioning unit can extend and retract relative to the rotating cylinder 13 to pre-position or clamp the heat sink 18; the rotation positioning unit can rotate circumferentially relative to the rotating cylinder 13. While the clamping and positioning unit clamps and positions the heat sink 18, the rotation positioning unit clamps the oil collection pipe 16 and rotates it to the docking position with the heat sink 18, and applies clamping force to the heat sink 18 through the oil collection pipe 16; thus, the heat sink 18 is simultaneously subjected to direct clamping from the clamping and positioning unit and lateral clamping from the oil collection pipe 16, forming double positioning, which significantly improves the assembly stability during the welding process; (4) The two working states of the rotary positioning unit take into account both the convenience of loading and unloading and the requirements of welding clamping. When the rotary positioning unit rotates to be parallel with the clamping positioning unit, the space is open, which makes it easy to place the heat sink 18 stably on the clamping positioning unit for pre-positioning, or to facilitate the disassembly of the welded plate heat sink, which is convenient for loading and unloading operations. When the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, the clamping positioning unit and the rotary positioning unit apply clamping force to the heat sink 18 from the up and down direction and the left and right direction respectively, to achieve multi-directional coordinated clamping and ensure that the heat sink 18 and the oil collection pipe 16 maintain a precise relative position during the welding process.

[0044] A welding method for a plate-type heat sink welding device includes the following steps: S1: Adjust the rotary positioning unit so that both the linear telescopic mechanism 14 and the guide rail 24 of the clamping positioning unit extend in the vertical direction (e.g., Figure 3 and Figure 5 ); S2: Place heat sink 18 between the first positioning plate and the second positioning plate in sequence, so that the first positioning plate and the second positioning plate form a pre-position of the heat sink 18 (pre-position means that the heat sink 18 can be passively moved between the first positioning plate and the second positioning plate, but the heat sink 18 is not clamped and positioned by the first positioning plate and the second positioning plate, and the heat sink 18 will not tilt and fall even when it is in the pre-positioned state under the combined action of the first positioning plate, the second positioning plate and the partition plate). S3: Place the oil collection pipe 16 between the two corresponding clamping heads 15 on the left and right, and make the clamping heads 15 clamp the oil collection pipe 16. S4: Rotate the second shaft 28 counterclockwise, which simultaneously drives the second gear 23 and the fourth gear 35 to rotate. The second gear 23 meshes with the first gear 22, causing the first rotating shaft 29 to rotate clockwise. The first rotating shaft 29 drives the adjusting disk 36 to rotate clockwise. The arc-shaped guide groove 39 on the adjusting disk 36 forces the guide block 38 to move along the guide rail 24 toward the first rotating shaft 29, causing the guide rod 37 to move along the guide rail 24 toward the first rotating shaft 29, thus achieving synchronous clamping of the heat sink 18 by the first positioning plate and the second positioning plate (e.g., Figure 8 (as shown) At the same time, the fourth gear 35 meshes with the third gear 34, causing the third gear 34 to rotate clockwise. The third gear 34 causes the third sleeve 27 to rotate clockwise. The third sleeve 27 causes the two linear telescopic mechanisms 14 to rotate. When the two linear telescopic mechanisms 14 rotate clockwise, they retract under the action of their own driving structure. like Figure 1 , Figure 4 , Figure 6As shown, when the first positioning plate and the second positioning plate clamp the heat sink 18 from top to bottom, the two oil collection pipes 16 move to clamp the heat sink 18 in the front-back direction (forming a clamping and positioning of the heat sink). S5: Rotate the flipping mechanism to adjust the direction of the heat sink 18 so that the part of the heat sink 18 that is connected to the oil collection pipe 16 faces upward. At this time, the two oil collection pipes 16 are located on the upper and lower sides of the heat sink 18, and the first positioning plate and the second positioning plate are located on the front and rear sides of the heat sink 18 respectively. S6: Adjust the position of the welding head so that the welding head is aligned with the contact position between the oil collection pipe 16 and the heat sink 18, and then rotate the flipping mechanism to adjust the angle of the heat sink 18 so that the welding head welds the contact position. S7: Adjust the position of the welding head in sequence, and rotate the flipping mechanism after each adjustment so that the welding head welds the contact positions of each heat sink 18 and oil collection pipe 16 in sequence. S8: After the two oil collection pipes 16 are welded to each heat sink 18, rotate the flipping mechanism to adjust the direction of the heat sink 18 so that the two oil collection pipes 16 are located on the front and rear sides of the heat sink 18, and the first positioning plate and the second positioning plate are located on the upper and lower sides of the heat sink 18 respectively. S9: Release the oil collection pipe 16 from the clamping head 15; S10: Rotate the second shaft 28 clockwise, and the second shaft 28 will simultaneously drive the second gear 23 and the fourth gear 35 to rotate; The second gear 23 meshes with the first gear 22, thereby driving the first rotating shaft 29 to rotate counterclockwise. The first rotating shaft 29 drives the adjusting disk 36 to rotate counterclockwise. The arc-shaped guide groove 39 on the adjusting disk 36 forces the guide block 38 to move away from the first rotating shaft 29 along the guide rail 24. The guide rod 37 then moves away from the first rotating shaft 29 along the guide rail 24, so that the first positioning plate and the second positioning plate can release the heat sink 18 simultaneously. At the same time, the fourth gear 35 meshes with the third gear 34, causing the third gear 34 to rotate counterclockwise. The third gear 34 causes the third sleeve 27 to rotate counterclockwise. The third sleeve 27 causes the two linear telescopic mechanisms 14 to rotate. When the two linear telescopic mechanisms 14 rotate counterclockwise, they extend under the action of their own driving structure. When the first positioning plate and the second positioning plate release the heat sink 18, the linear telescopic mechanism 14 and the guide rail 24 of the clamping positioning unit are both extended in the vertical direction to remove the welded heat sink 18 and oil collection pipe.

[0045] In the above embodiments, the rotating cylinder includes a first circular plate, a second circular plate, and a third circular plate arranged sequentially away from the guide support column. The first circular plate, the second circular plate, and the third circular plate are fixed relative to each other by the cylinder wall. The first circular plate and the second circular plate are spaced apart to form a first chamber, and the second circular plate and the third circular plate are spaced apart to form a second chamber. In other embodiments, the rotating cylinder may also include only a first circular plate and a second circular plate, with the first circular plate and the second circular plate fixed relative to each other by the cylinder wall, forming only one chamber between the first circular plate and the second circular plate.

[0046] In the above embodiments, the clamping and positioning unit further includes an adjustment disc fixed on the first rotating shaft and a guide rail fixed on the third disc; in other embodiments, the clamping and positioning unit further includes an adjustment disc fixed on the first rotating shaft and a guide rail fixed on the cylinder wall.

[0047] In the above embodiments, the lifting mechanism includes a rectangular hollow column that is slidably disposed in a guide support column, and a rotating drum that is rotatably disposed on the rectangular hollow column. A hydraulic telescopic rod is fixed at the bottom of the guide support column and is located inside the rectangular hollow column. A sprocket is rotatably disposed at the top of the telescopic end of the hydraulic telescopic rod. The sprocket is adapted to a chain, one end of which is fixed to the bottom of the guide support column and the other end of which is fixed to the rectangular hollow column. In other embodiments, the lifting mechanism may also include only a hydraulic telescopic rod, and the rotating drum is rotatably disposed relative to the telescopic end of the hydraulic telescopic rod.

[0048] In the above embodiments, the top of the guide support column is provided with a reversing wheel, and also includes a fall arresting rope wrapped around the reversing wheel. One end of the fall arresting rope is fixed to the rectangular hollow column, and the other end of the fall arresting rope is wound around a winch provided at the bottom of the guide support column. In other embodiments, the fall arresting rope may not be provided or other fall arresting structures may be used.

Claims

1. A chip heat spreader welding apparatus, characterized by, include, The fixed frame includes two guide support columns extending in the vertical direction and a base plate fixedly connected to the bottom of the two guide support columns; The lifting mechanism is provided in two sets, and the two sets of lifting mechanisms are correspondingly installed in the guide support columns; A tilting mechanism is installed between the two lifting mechanisms, and the tilting mechanism is rotated relative to the lifting mechanisms. The flipping mechanism includes a clamping and positioning unit and a rotary positioning unit; The tilting mechanism includes a rotating drum that is rotatably mounted relative to the lifting mechanism, with the axis of the rotating drum extending in the left-right direction; The clamping and positioning unit can extend and retract relative to the rotating cylinder to pre-position or clamp the heat sink. The rotary positioning unit is circumferentially rotatable relative to the rotating drum. The rotary positioning unit includes clamping heads that clamp the oil collection pipe on the left and right sides. While the clamping positioning unit clamps and positions the heat sink, the rotary positioning unit clamps the oil collection pipe and rotates it to the docking point with the heat sink, and clamps the heat sink through the oil collection pipe. When the rotary positioning unit rotates to be parallel with the clamping positioning unit, it is convenient to place the heat sink in the clamping positioning unit for pre-positioning; When the rotary positioning unit rotates to be perpendicular to the clamping positioning unit, it is convenient for the clamping positioning unit and the rotary positioning unit to clamp and position the heat sink at the same time. The welding assembly includes a welding head that can be adjusted in the left and right position relative to the guide support column.

2. The plate-type radiator welding device according to claim 1, characterized in that, Two rotating cylinders are provided, each corresponding to a lifting mechanism. Each rotating cylinder includes a first circular plate, a second circular plate, and a third circular plate arranged sequentially away from the guide support column. The first, second, and third circular plates are fixed relative to each other by the cylinder wall. The first and second circular plates are spaced apart to form a first chamber, and the second and third circular plates are spaced apart to form a second chamber. Each rotating cylinder includes a first rotating shaft that is rotatably arranged relative to the first, second, and third circular plates, and the first rotating shaft is located at the axis of the rotating cylinder. The rotating cylinder also includes a second rotating shaft that is rotatably arranged relative to the first, second, and third circular plates, and the second rotating shaft is eccentrically arranged relative to the axis of the rotating cylinder. A third sleeve is rotatably arranged in the first chamber, and the third sleeve is coaxially arranged with the first rotating shaft and sleeved on the first rotating shaft. The rotation positioning unit is arranged in the first chamber, and the clamping positioning unit is arranged in the second chamber.

3. The plate-type radiator welding device according to claim 2, characterized in that, The clamping and positioning unit includes a first gear fixed on a first rotating shaft and a second gear fixed on a second rotating shaft. The first gear and the second gear mesh and drive each other. The clamping and positioning unit also includes an adjusting disk fixed on the first rotating shaft and a guide rail fixed on a third disk. The guide rail extends radially along the third disk. A guide rod is slidably arranged in the guide rail. An adjusting mechanism is provided between the guide rod and the adjusting disk. When the adjusting disk rotates, the adjusting mechanism drives the guide rod to slide relative to the guide rail. The rotating cylinder has a clearance hole to avoid the guide rod.

4. The plate-type radiator welding device according to claim 3, characterized in that, The adjustment mechanism includes an arc-shaped guide groove on the adjustment plate and a guide block fixed to the lower end of the guide rod. The guide block is adapted to slide with the arc-shaped guide groove. There are two guide rails, which are symmetrically arranged about the second axis of rotation. The adjustment mechanism has two sets of guide rails.

5. The plate-type radiator welding device according to claim 4, characterized in that, A positioning plate is fixed to the end of the guide rod away from the first rotating shaft. The positioning plate includes partition plates fixedly arranged relative to the positioning plate along its extension direction. Adjacent partition plates form positioning grooves for placing heat sinks. The positioning plate includes a first positioning plate and a second positioning plate respectively arranged corresponding to the two guide rods of the same rotating cylinder.

6. A finned radiator welding apparatus according to any one of claims 2-5, characterized in that, The rotary positioning unit includes a third gear fixed on the third sleeve and a fourth gear fixed on the second rotating shaft. The third gear and the fourth gear mesh and drive each other. A linear telescopic mechanism that extends and retracts radially along the third sleeve is fixed on the third sleeve. The clamping head is fixed to the telescopic end of the linear telescopic mechanism. An arc-shaped groove is provided on the rotating cylinder to avoid the rotation of the linear telescopic mechanism.

7. A finned radiator welding apparatus according to any one of claims 1-5, characterized in that, The lifting mechanism includes a rectangular hollow column that is slidably disposed in a guide support column. The rotating drum is rotatably disposed on the rectangular hollow column. A hydraulic telescopic rod is fixed at the bottom of the guide support column. The hydraulic telescopic rod is located inside the rectangular hollow column. A sprocket is rotatably disposed at the top of the telescopic end of the hydraulic telescopic rod. The sprocket is adapted to a chain. One end of the chain is fixed to the bottom of the guide support column, and the other end is fixed to the rectangular hollow column.

8. The plate-type radiator welding device according to claim 7, characterized in that, The top of the guide support column is equipped with a reversing wheel, and also includes a fall arresting rope wrapped around the reversing wheel. One end of the fall arresting rope is fixed to the rectangular hollow column, and the other end of the fall arresting rope is wound around a winch set at the bottom of the guide support column.

9. A finned radiator welding apparatus according to any one of claims 1-5, characterized in that, The welding assembly includes a lead screw and a fixed rod rotatably disposed between two guide support columns. The lead screw is threaded with a nut, which slides relative to the fixed rod. The welding head is fixed on the nut.

10. A welding method for a plate-type radiator welding apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Adjust the rotary positioning unit so that the guide rails of both the linear telescopic mechanism and the clamping positioning unit extend in the vertical direction. S2: Place heat sinks between the first positioning plate and the second positioning plate in sequence, so that the first positioning plate and the second positioning plate are pre-positioned with the heat sinks; S3: Place the oil collection pipe between the two corresponding clamping heads on the left and right, and make the clamping heads clamp the oil collection pipe; S4: Rotate the second shaft counterclockwise, which simultaneously drives the second gear and the fourth gear to rotate; The second gear meshes with the first gear, causing the first rotating shaft to rotate clockwise. The first rotating shaft drives the adjusting plate to rotate clockwise. The arc-shaped guide groove on the adjusting plate forces the guide block to move along the guide rail toward the first rotating shaft, causing the guide rod to move along the guide rail toward the first rotating shaft, so that the first positioning plate and the second positioning plate can clamp the heat sink synchronously. At the same time, the fourth gear meshes with the third gear, causing the third gear to rotate clockwise. The third gear drives the third sleeve to rotate clockwise, and the third sleeve drives the two linear telescopic mechanisms to rotate. When the two linear telescopic mechanisms rotate clockwise, they contract under the action of their own driving structure. When the first positioning plate and the second positioning plate clamp the heat sink from top to bottom, the two oil collection pipes move to clamp the heat sink in the front-to-back direction. S5: Rotate the flipping mechanism to adjust the direction of the heat sink so that the part of the heat sink that connects with the oil collection pipe faces upward. At this time, the two oil collection pipes are located on the upper and lower sides of the heat sink, and the first positioning plate and the second positioning plate are located on the front and rear sides of the heat sink, respectively. S6: Adjust the position of the welding head so that it is aligned with the contact position between the oil collection pipe and the heat sink. Then rotate the flipping mechanism to adjust the angle of the heat sink so that the welding head can weld the contact position. S7: Adjust the position of the welding head sequentially, and rotate the flipping mechanism after each adjustment so that the welding head welds the contact positions of each heat sink and oil collection pipe in sequence. S8: After both oil collection pipes are welded to each heat sink, rotate the flipping mechanism to adjust the direction of the heat sink so that the two oil collection pipes are located on the front and rear sides of the heat sink, and the first positioning plate and the second positioning plate are located on the upper and lower sides of the heat sink respectively. S9: Releases the clamping head from the oil collection pipe; S10: Rotate the second shaft clockwise, which simultaneously drives the second gear and the fourth gear to rotate; The second gear meshes with the first gear, thereby driving the first rotating shaft to rotate counterclockwise. The first rotating shaft drives the adjusting plate to rotate counterclockwise. The arc-shaped guide groove on the adjusting plate forces the guide block to move away from the first rotating shaft along the guide rail. The guide rod then moves away from the first rotating shaft along the guide rail, so that the first positioning plate and the second positioning plate can release the heat sink at the same time. At the same time, the fourth gear meshes with the third gear, causing the third gear to rotate counterclockwise. The third gear drives the third sleeve to rotate counterclockwise, and the third sleeve drives the two linear telescopic mechanisms to rotate. When the two linear telescopic mechanisms rotate counterclockwise, they extend under the action of their own driving structure. When the first and second positioning plates release the heat sink, the guide rails of the linear telescopic mechanism and the clamping positioning unit extend in the vertical direction to remove the welded heat sink and oil collection pipe.

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