An automatic welding tool for a heat plate and a heat dissipation shell

Abstract

The application relates to the field of welding tooling, and discloses an automatic welding tooling for a heat equalizing plate and a heat dissipation shell, which comprises a workbench on which the heat equalizing plate and the heat dissipation shell are placed, and further comprises: a blanking component, the blanking component comprising multiple pairs of feeding plates, each pair of feeding plates being responsible for downward transportation of the heat equalizing plate until the heat equalizing plate is released after moving to a set position; a guiding and positioning component, the guiding and positioning component comprising multiple first abutting plates and second abutting plates, a limiting plate being arranged on the first abutting plate, and the limiting plate being responsible for positioning and guiding the falling of the heat equalizing plate. The second abutting plates are close to each other, so that the heat equalizing plate is centered on an axial direction; then a pressing plate is rotated downward, the heat equalizing plate moves under the elastic pad of the limiting plate, is smoothly clamped between a pair of first abutting plates, can also be centered on another axial direction, and finally the purpose of guiding and positioning is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to an automated welding fixture for a heat spreader and a heat sink housing. Background Technology

[0002] Heat sinks, as efficient heat dissipation components, are widely used in the heat dissipation systems of high-power electronic devices. In actual assembly, heat sinks are typically fixed to the heat sink housing by welding to form a heat dissipation assembly. Common welding processes include solder paste reflow soldering, laser soldering, or thermoforming soldering, among which solder paste reflow soldering is widely used due to its mature technology and low cost. This process first applies solder paste to the soldering area of ​​the heat sink housing, then the heat sink is attached to the housing, and finally, the solder paste is melted in a reflow oven and cooled to achieve a strong weld.

[0003] To ensure precise positioning of the heat spreader and heat sink housing before welding, clamping fixtures are required for temporary positioning and fixation during production. Existing technologies typically employ manual clamping plates, quick-release clamps, or simple spring-loaded blocks. These fixtures usually rely on operators manually locking each clamping point and using locating pins or limit blocks for guidance and positioning. However, such fixtures have shortcomings in actual mass production: First, the guiding and positioning process depends on manual alignment of multiple locating points, which is cumbersome and time-consuming for single-piece processing, making it difficult to meet the needs of large-scale production; second, the clamping and positioning actions are separate, requiring multiple steps to complete one assembly, further reducing production efficiency.

[0004] More importantly, in the process of using solder paste reflow soldering, the heat sink housing needs to be attached to the heat spreader as soon as possible after the solder paste is applied to avoid oxidation, solvent evaporation, or decreased fluidity of the solder paste due to prolonged exposure to air, which would affect solder wetting and final solder strength. However, when using the aforementioned traditional clamping fixtures, operators often complete the solder paste application process for the heat sink housing first, and then spend a considerable amount of time placing, aligning, and locking the heat spreader at multiple clamping points, thus affecting the soldering quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automated welding fixture for heat dissipation plates and heat sink housings, solving the problem that current technologies cannot perform batch positioning and clamping operations before welding heat dissipation plates and heat sink housings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automated welding fixture for a heat spreader plate and a heat sink housing, comprising a worktable on which the heat spreader plate and the heat sink housing are placed, and further comprising: a feeding component, the feeding component comprising multiple pairs of feeding plates, each pair of feeding plates being responsible for transporting the heat spreader plate downwards until it reaches a set position and is then released; a guiding and positioning component, the guiding and positioning component comprising multiple first abutment plates and second abutment plates, the first abutment plates being provided with limit plates, the limit plates being responsible for positioning and guiding the heat spreader plate as it falls; and a spraying component. The spraying component includes a dispensing needle that moves obliquely along a rectangular trajectory, responsible for applying flux; an avoidance component, which includes a first telescopic member connected to a first contact plate and a second telescopic member connected to a second contact plate, the avoidance component being responsible for the alternating contraction of the first and second telescopic members to avoid the movement of the dispensing needle; and a driving component, which includes multiple pressure plates, the pressure plates having at least two states. When the pressure plate is in the first state, the heat spreader is located between a pair of limiting plates, and when the pressure plate is in the second state, the heat spreader is in close contact with the heat dissipation housing.

[0007] Preferably, the driving component further includes a drive shaft and a driven shaft, both of which are movably fitted with support plates. The support plates are fixedly connected to the worktable, and multiple pressure plates are respectively fixedly connected to the drive shaft and the driven shaft.

[0008] Preferably, a reduction motor is fixedly connected to the drive shaft, a drive wheel is fixedly sleeved near the end of the drive shaft, a transmission shaft is fixedly connected to one of the support plates, a driven wheel is fixedly sleeved on the transmission shaft, the drive wheel and the driven wheel are meshed together, pulleys are fixedly sleeved on the transmission shaft and the driven shaft, and a transmission belt is sleeved on the pair of pulleys.

[0009] Preferably, the limiting plate is arranged at an angle and an elastic pad is fixedly connected to its outer wall. When the pressure plate rotates, it pushes the heat-spreading plate downward and squeezes the elastic pad until it is stuck between a pair of first contact plates.

[0010] Preferably, the feeding component further includes a pair of conveyor belts, and a pair of conveyor rollers are drivenly connected to the inner wall of the conveyor belts. A stepper motor is fixedly connected to the end of one of the conveyor rollers. The feeding plate is fixedly connected to the conveyor belt. When the conveyor belt moves, the pair of feeding plates at the bottom release the heat dissipation plate.

[0011] Preferably, both the first telescopic component and the second telescopic component are hydraulic cylinders, and both the first telescopic component and the second telescopic component are provided with a fixing plate at their outer ends. The hydraulic cylinders are electrically connected to a controller.

[0012] Preferably, the end of the pressure plate is provided with an extension component, the extension component includes a fixing block, a driving block is slidably connected to the fixing block, a movable groove is opened at the bottom of the fixing block, and an extension plate is slidably connected to the movable groove. When the pressure plate is pressed down to the lowest point, the extension plate automatically opens to increase the distance of the force application point.

[0013] Preferably, the bottom of the drive block is provided with a first inclined groove, and the end of the extension plate is provided with a second inclined groove, and the first inclined groove abuts against a pair of second inclined grooves.

[0014] Preferably, the inner wall of the movable groove is provided with a guide rail plate, the inner wall of the guide rail plate is slidably connected with a slider, and a reset member is provided between the slider and the inner wall of the guide rail plate.

[0015] Preferably, the feeding component is provided with a pushing component, which includes a hydraulic rod responsible for pushing the heat spreader to the uppermost feeding plate.

[0016] This invention provides an automated welding fixture for a heat spreader and a heat sink housing. It offers the following advantages:

[0017] 1. The present invention sets up a first telescopic member and a second telescopic member, and the second abutment plates are brought close to each other, so that the heat spreader is centered on one direction axis. Then the pressure plate rotates downward, and the heat spreader moves under the elastic pad of the limiting plate and smoothly gets into the pair of first abutment plates, so that it can also be centered on the other direction axis, and finally achieves the purpose of guiding and positioning.

[0018] 2. This invention, by setting a first telescopic component and a second telescopic component, uses a controller to make the first and second telescopic components alternately contract and extend. Before the first telescopic component (or the second telescopic component) contracts, the second telescopic component (or the first telescopic component) extends first until it contacts the heat spreader plate, and only then does the first telescopic component (or the second telescopic component) begin to contract. By setting the time interval of the contraction and extension, in conjunction with the moving speed of the dispensing needle, the dispensing needle can make a complete circle without motion interference. This ensures that the heat spreader plate is always clamped during dispensing, the clamping point does not change, and there is no frequent clamping, saving time.

[0019] 3. By setting a pressure plate, the present invention can not only position the heat spreader above the heat sink housing before bonding, but also automatically guide and position it to prevent displacement; and the pressure plate can continue to rotate to help the heat sink housing and the heat spreader fit tightly together. This not only shortens the processing time, but also avoids the solder paste being exposed to the outside for a long time, which affects its performance.

[0020] 4. By pushing the extension plate to move a set distance, the force application points are adjusted from being concentrated in one place to being spaced out at a certain distance. This effectively avoids excessive stress concentration on the heat spreader and dispersion of the force application points, thus significantly improving the force application method of the previous embodiment and making the force application more scientific and reliable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 This is a schematic diagram of the overall front view of the present invention;

[0024] Figure 4 This is a schematic diagram of the overall partial structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified structural diagram at point A;

[0026] Figure 6 This is a schematic diagram of the overall structure of the extension component of the present invention;

[0027] Figure 7 This is a schematic diagram of the shell-removed structure of the extended component of the present invention;

[0028] Figure 8 This is a schematic diagram of the front view of the extended component of the present invention after shell removal.

[0029] The components include: 1. Workbench; 2. Unloading component; 21. Feeding plate; 22. Conveyor belt; 23. Stepper motor; 3. Guide and positioning component; 31. First contact plate; 32. Second contact plate; 33. Limiting plate; 34. Elastic pad; 4. Spraying component; 5. Avoidance component; 51. First telescopic component; 52. Second telescopic component; 53. Fixed plate; 6. Drive component; 61. Pressure plate; 62. Drive shaft; 63. Driven shaft; 64. Gear motor; 65. Drive wheel; 66. Transmission shaft; 67. Driven wheel; 68. Pulley; 69. Transmission belt; 7. Extension component; 71. Fixed block; 72. Drive block; 73. Extension plate; 74. First inclined groove; 75. Second inclined groove; 76. Reset component; 77. Movable groove; 78. Guide rail plate; 79. Mounting plate; 710. Shaft platform; 711. Movable shaft. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to the appendix Figure 1 -Appendix Figure 3 This invention provides an automated welding fixture for a heat spreader and a heat sink housing, including a workbench 1 on which the heat spreader and heat sink housing are placed, and further including: a feeding component 2, which includes multiple pairs of feeding plates 21, each pair of feeding plates 21 being responsible for transporting the heat spreader downwards until it reaches a set position and is then released; a guiding and positioning component 3, which includes multiple first abutment plates 31 and second abutment plates 32, with a limit plate 33 provided on the first abutment plates 31, the limit plate 33 being responsible for positioning and guiding the heat spreader as it falls; and a spraying component 4, which includes a spraying component along a rectangular... The dispensing needle moves with an inclined trajectory and is responsible for applying flux; the avoidance component 5 includes a first telescopic member 51 connected to the first contact plate 31 and a second telescopic member 52 connected to the second contact plate 32. The avoidance component 5 is responsible for the alternating contraction of the first telescopic member 51 and the second telescopic member 52 to avoid the movement of the dispensing needle; the driving component 6 includes multiple pressure plates 61. The pressure plates 61 have at least two states. When the pressure plate 61 is in the first state, the heat spreader is located between a pair of limiting plates 33. When the pressure plate 61 is in the second state, the heat spreader is in close contact with the heat dissipation shell.

[0032] Specifically, the dispensing needle can dispense glue manually or through a dispensing machine, such as an automatic vision dispensing machine or a desktop dispensing machine. The automatic vision dispensing machine is preferred, which has three linear inclined grooves. In this case, a long rod is set on the inclined groove of the transmission, and the long rod is detachably connected to the dispensing machine, so that the dispensing machine can initially stop on the heat dissipation housing.

[0033] First, place the heat sink housing on the workbench 1. The workbench 1 can be equipped with a limiting slot. Place the heat sink housing on the limiting slot, drive the unloading component 2, and the bottom heat spreader plate falls. The heat spreader plate is limited by the first contact plate 31 and the second contact plate 32. Then, apply flux, which can be solder paste, using a dispensing needle. During the application process, the first telescopic component 51 and the second telescopic component 52 alternately contract and extend. Before the first telescopic component 51 (or the second telescopic component 52) ​​contracts, the second telescopic component 52 (or the first telescopic component 51) extends first until it contacts the heat spreader plate. After that, the first telescopic component 51 (or the second telescopic component 52) ​​extends. 52) Just as it begins to shrink, by setting the time interval of the expansion and contraction, and coordinating it with the moving speed of the dispensing needle, the dispensing needle can make a complete circle without motion interference. It moves along a rectangular trajectory to form a rectangular coating area. Finally, it drives the pressure plate 61 to rotate downward, pushing the heat spreader plate down to fit against the heat sink housing and squeezing it to reduce the gap between the two to the set distance. Then, the heat spreader plate and the heat sink housing are taken out and transported to the reflow oven, which is divided into a preheating zone, a constant temperature zone, a reflow zone, and a cooling zone. The oven has hot air circulation and infrared heating. The heat spreader plate and the heat sink housing are placed on a mesh belt or tray and enter from one end and exit from the other end at a uniform speed. They are already welded when they come out.

[0034] Please see the appendix Figure 4 -Appendix Figure 5 The drive component 6 also includes a drive shaft 62 and a driven shaft 63. Support plates are movably sleeved on both the drive shaft 62 and the driven shaft 63. The support plates are fixedly connected to the worktable 1. Multiple pressure plates 61 are respectively fixedly connected to the drive shaft 62 and the driven shaft 63.

[0035] The pressure plate 61 has at least two states: a vertical stationary state and a rotating tilted state, waiting for the heat spreader to be dropped. After the material is dropped, it is positioned. After positioning, the pressure plate 61 rotates by angle A and presses the heat spreader to move down, maintaining a distance of about 1-5 cm from the heat sink housing. Then, glue is applied. After the glue is applied, the pressure plate 61 rotates by angle B to make the heat spreader and heat sink housing adhere tightly and press firmly.

[0036] Please see the appendix Figure 4 A geared motor 64 is fixedly connected to the drive shaft 62. A drive wheel 65 is fixedly sleeved on the drive shaft 62 near its end. A transmission shaft 66 is fixedly connected to one of the support plates. A driven wheel 67 is fixedly sleeved on the transmission shaft 66. The drive wheel 65 and the driven wheel 67 are meshed together. Pulleys 68 are fixedly sleeved on the transmission shaft 66 and the driven shaft 63. A transmission belt 69 is sleeved on both of the pair of pulleys 68.

[0037] When the geared motor 64 is turned on, the geared motor 64 drives the drive shaft 62 to rotate, and the drive shaft 62 drives the drive wheel 65 to rotate. The drive wheel 65 meshes with the driven wheel 67, causing the driven wheel 67 to rotate as well. The driven wheel 67 drives the transmission shaft 66 to rotate. Since both the transmission shaft 66 and the driven shaft 63 are fitted with pulleys 68, the two pulleys 68 rotate synchronously through the transmission belt 69, so that when the drive shaft 62 rotates in the forward direction, the driven shaft 63 can rotate in the reverse direction. Finally, after the geared motor 64 is turned on, the drive shaft 62 and the driven shaft 63, along with their respective pressure plates 61, press against the heat spreader, completing the guiding positioning and subsequent pressing and bonding.

[0038] The limiting plate 33 is arranged at an angle, and an elastic pad 34 is fixedly connected to its outer wall. When the pressure plate 61 rotates, it pushes the heat-spreading plate downward and squeezes the elastic pad 34 until it is stuck between a pair of first contact plates 31.

[0039] The limiting plate 33 tilts and unfolds to both sides. When the heat spreader falls, the landing point will shift, but it will remain horizontal. The xy axis is established with the horizontal plane, and the z axis is established perpendicular to the horizontal plane. Initially, the z axis remains unchanged. The second abutment plates 32 move closer to each other, so that the heat spreader is centered on the y axis. Then the pressure plate 61 rotates downward, and the heat spreader moves under the elastic pad 34 of the limiting plate 33. Whether it is biased to the left or the right, it can be smoothly locked between the pair of first abutment plates 31 under the action of the pressure plate 61, and finally achieve the purpose of guiding and positioning.

[0040] Please see the appendix Figure 2 -Appendix Figure 3 The feeding component 2 also includes a pair of conveyor belts 22. A pair of conveyor rollers are connected to the inner wall of the conveyor belts 22. A stepper motor 23 is fixedly connected to the end of one of the conveyor rollers. The feeding plate 21 is fixedly connected to the conveyor belts 22. When the conveyor belts 22 move, the pair of feeding plates 21 at the bottom release the heat dissipation plate.

[0041] The conveyor belt 22 moves intermittently under the action of the stepper motor 23, causing the feeding plate 21 at the bottom to release the heat dissipation plate intermittently, thus completing the batch clamping work of the heat dissipation plate and the heat sink shell.

[0042] Preferably, the feeding component 2 is provided with a pushing component, which includes a hydraulic rod. The hydraulic rod is responsible for pushing the heat-spreading plate to the uppermost feeding plate 21. Each time the conveyor belt 22 runs once, the hydraulic rod will push a new heat-spreading plate to the uppermost pair of feeding plates 21 to achieve the purpose of replenishing materials.

[0043] Both the first telescopic component 51 and the second telescopic component 52 are hydraulic cylinders. The outer ends of both the first telescopic component 51 and the second telescopic component 52 are fixedly connected to a fixing plate 53, which is fixedly connected to the worktable 1. The hydraulic cylinders are electrically connected to a controller. The controller controls the first telescopic component 51 and the second telescopic component 52 to retract and extend. The working process is as follows: When the heat spreader plate falls, the first telescopic component 51 enters the extended state, and a pair of first abutment plates 31 move closer together at a set distance. The heat spreader plate lands on the elastic pad 34, and its position is slightly offset. Then the controller makes the second telescopic component 52 move closer together, and the second abutment plates 32 move closer together, so that the heat spreader plate is centered in one dimension. Then the pressure plate 61 rotates downward, and the heat spreader plate moves under the elastic pad 34 of the limiting plate 33. No matter which first abutment plate 31 it is offset to, it can smoothly fit between a pair of first abutment plates 31 along the tilt angle of the limiting plate 33, so that it is centered in all dimensions.

[0044] Example 2 differs from Example 1 in that the following technical features are added: Please refer to the appendix. Figure 6 -Appendix Figure 7 The end of the pressure plate 61 is provided with an extension component 7, which includes a fixed block 71. A drive block 72 is slidably connected to the fixed block 71. A movable groove 77 is opened at the bottom of the fixed block 71. An extension plate 73 is slidably connected to the movable groove 77. When the pressure plate 61 is pressed down to the lowest position, the extension plate 73 automatically opens to increase the distance of the force application point.

[0045] Specifically, a movable shaft 711 is fixedly passed through the end of the pressure plate 61. The two ends of the movable shaft 711 are rotatably connected to the shaft platform 710. The shaft platform 710 is fixedly connected to the top surface of the fixed block 71. Both shaft platforms 710 are fixedly connected to the drive block 72. The fixed block 71 is detachably connected to the mounting plate 79 by screws, which is responsible for limiting the drive block 72.

[0046] As the pressure plate 61 continues to press down, the extension plate 73 moves outward through the compression, and the distance between the pressure points begins to increase, making the heat spreader plate more evenly compressed. This prevents the force from being too concentrated, which would cause the heat spreader plate to be subjected to unreasonable force, either insufficient compression or excessive compression, which would damage the capillary channels inside the heat spreader plate.

[0047] Please see the appendix Figure 8 The bottom of the drive block 72 is provided with a first inclined groove 74, and the end of the extension plate 73 is provided with a second inclined groove 75. The first inclined groove 74 and the pair of second inclined grooves 75 abut against each other.

[0048] The inner wall of the movable groove 77 is provided with a guide plate 78, and a slider is slidably connected to the inner wall of the guide plate 78. A reset element 76 is provided between the slider and the inner wall of the guide plate 78, and the reset element 76 is a reset spring.

[0049] Specifically, a pressure sensor can be installed at the inner bottom of the extension plate 73. By observing the pressure sensor reading, it can be ensured that the pressure is appropriate and the spring force of the return spring is between 2 and 10 Newtons.

[0050] When the pressure plate 61 moves downward, it squeezes the second inclined groove 75 through the first inclined groove 74, causing a pair of extension plates 73 to extend outward and push the extension plates 73 to move a set distance. Although the contact area remains unchanged, the force application point is adjusted from the original concentration to a certain distance, which effectively avoids the excessive concentration of stress on the heat spreader and the dispersion of the force application point. This greatly improves the force application method of the previous embodiment, making the force application more scientific and reliable.

[0051] Working principle: First, place the heat sink on the workbench 1, and set the dispensing needle at an angle on the heat sink. Turn on the stepper motor 23. Under the action of the stepper motor 23, the conveyor belt 22 moves intermittently, so that the feeding plate 21 at the bottom releases the heat spreader intermittently, and the heat spreader at the bottom begins to fall.

[0052] The first telescopic member 51 enters the extended state, and a pair of first abutment plates 31 approach each other at a set distance. The heat spreader plate falls on the elastic pad 34, and its position is slightly offset. Then the controller causes the second telescopic member 52 to approach each other, and the second abutment plates 32 to approach each other, so that the heat spreader plate is centered in one dimension. Then the pressure plate 61 rotates downward, and the heat spreader plate moves under the elastic pad 34 of the limiting plate 33. No matter which first abutment plate 31 it is offset towards, it can smoothly fit between a pair of first abutment plates 31 along the tilt angle of the limiting plate 33, so that it is centered in all dimensions.

[0053] The heat spreader is limited by the first contact plate 31 and the second contact plate 32. Then, flux is sprayed. A dispensing needle is used. The dispensing needle is set at an angle. During the application process, the first telescopic member 51 and the second telescopic member 52 alternately contract and extend, so that the dispensing needle can go around a circle and move in a rectangular trajectory to form a rectangular application area.

[0054] The pressure plate 61 is driven to rotate downwards again, pushing the heat spreader plate down to fit against the heat dissipation shell;

[0055] When the pressure plate 61 moves down, it squeezes the second inclined groove 75 through the first inclined groove 74, causing a pair of extension plates 73 to extend outward. This pushes the extension plates 73 to move a set distance. Although the contact area remains unchanged, the force application point is adjusted from being concentrated to being spaced out at a certain distance. This effectively avoids excessive stress concentration and squeezing of the heat spreader, reducing the gap between the heat spreader and the heat sink housing to the set distance. Then, the heat spreader and the heat sink housing are removed and transported to the reflow oven. The solder paste is heated evenly and flows to the gap, completing the soldering process.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated welding fixture for a heat spreader and a heat sink housing, comprising a worktable (1) on which the heat spreader and the heat sink housing are placed, characterized in that, Also includes: The unloading component (2) includes multiple pairs of feeding plates (21), each pair of feeding plates (21) is responsible for transporting the heat exchange plate downwards until it moves to a set position and then releases the heat exchange plate; The guide positioning component (3) includes multiple first contact plates (31) and second contact plates (32). A limiting plate (33) is provided on the first contact plate (31). The limiting plate (33) is responsible for positioning and guiding the heat exchange plate as it falls. The spraying component (4) includes a dispensing needle that moves obliquely along a rectangular trajectory and is responsible for applying flux. The avoidance component (5) includes a first telescopic member (51) connected to the first contact plate (31) and a second telescopic member (52) connected to the second contact plate (32). The avoidance component (5) is responsible for the alternating contraction of the first telescopic member (51) and the second telescopic member (52) to avoid the movement of the dispensing needle. The driving component (6) includes multiple pressure plates (61). The pressure plates (61) have at least two states. When the pressure plate (61) is in the first state, the heat spreader is located between a pair of limiting plates (33). When the pressure plate (61) is in the second state, the heat spreader is in close contact with the heat dissipation shell.

2. The automated welding fixture for a heat spreader and a heat sink housing according to claim 1, characterized in that, The drive component (6) further includes a drive shaft (62) and a driven shaft (63). A support plate is movably sleeved on both the drive shaft (62) and the driven shaft (63). The support plate is fixedly connected to the worktable (1). Multiple pressure plates (61) are respectively fixedly connected to the drive shaft (62) and the driven shaft (63).

3. The automated welding fixture for a heat spreader and a heat sink housing according to claim 2, characterized in that, A geared motor (64) is fixedly connected to the drive shaft (62). A drive wheel (65) is fixedly sleeved near the end of the drive shaft (62). A transmission shaft (66) is fixedly connected to one of the support plates. A driven wheel (67) is fixedly sleeved on the transmission shaft (66). The drive wheel (65) and the driven wheel (67) are meshed together. Pulleys (68) are fixedly sleeved on the transmission shaft (66) and the driven shaft (63). A transmission belt (69) is sleeved on a pair of pulleys (68).

4. The automated welding fixture for a heat spreader and a heat sink housing according to claim 3, characterized in that, The limiting plate (33) is arranged at an angle and the outer wall is fixedly connected with an elastic pad (34). When the pressure plate (61) rotates, it pushes the heat spreader plate downward and squeezes the elastic pad (34) until it is stuck between a pair of first contact plates (31).

5. The automated welding fixture for a heat spreader and a heat sink housing according to claim 4, characterized in that, The feeding component (2) also includes a pair of conveyor belts (22). The inner wall of the conveyor belts (22) is connected to a pair of conveyor rollers. One of the conveyor rollers is fixedly connected to a stepper motor (23) at its end. The feeding plate (21) is fixedly connected to the conveyor belts (22). When the conveyor belts (22) move, the pair of feeding plates (21) at the bottom release the heat dissipation plate.

6. The automated welding fixture for a heat spreader and a heat sink housing according to claim 5, characterized in that, Both the first telescopic member (51) and the second telescopic member (52) are hydraulic cylinders. The outer ends of both the first telescopic member (51) and the second telescopic member (52) are provided with fixing plates (53). The hydraulic cylinders are electrically connected to a controller.

7. The automated welding fixture for a heat spreader and a heat sink housing according to claim 5, characterized in that, The end of the pressure plate (61) is provided with an extension component (7), the extension component (7) includes a fixing block (71), a driving block (72) is slidably connected to the fixing block (71), the bottom of the fixing block (71) is provided with a movable groove (77), the movable groove (77) is slidably connected to an extension plate (73), when the pressure plate (61) is pressed down to the lowest position, the extension plate (73) automatically opens, increasing the distance of the force application point.

8. The automated welding fixture for a heat spreader and a heat sink housing according to claim 7, characterized in that, The bottom of the drive block (72) is provided with a first inclined groove (74), and the end of the extension plate (73) is provided with a second inclined groove (75). The first inclined groove (74) and a pair of second inclined grooves (75) abut against each other.

9. The automated welding fixture for a heat spreader and a heat sink housing according to claim 8, characterized in that, The inner wall of the movable groove (77) is provided with a guide plate (78), and a slider is slidably connected to the inner wall of the guide plate (78). A reset member (76) is provided between the slider and the inner wall of the guide plate (78).

10. The automated welding fixture for a heat spreader and a heat sink housing according to claim 1, characterized in that, The feeding component (2) is provided with a pushing component, which includes a hydraulic rod. The hydraulic rod is responsible for pushing the heat exchange plate to the uppermost feeding plate (21).

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