Automatic welding device for cooling fan machining

Abstract

The invention discloses an automatic welding device for cooling fan machining, and belongs to the technical field of laser welding, the automatic welding device comprises a welding assembly table carrying a laser welding head, and a multi-degree-of-freedom control part is arranged on the welding assembly table and used for driving the laser welding head to adjust the welding angle. The welding assembly table is connected with a synchronous positioning welding piece used for conducting standard positioning on the fan blades. According to the fan blade welding device, it is guaranteed that each fan blade can be tightly attached to a fan welding ring during welding through the synchronous positioning welding part and the welding positioning opening, the problems of welding cavities and different lengths caused by untight attachment are solved fundamentally, the visual recognition device and the multi-degree-of-freedom control part enable the laser welding head to flexibly adjust the angle and accurately follow the welding track, and the welding efficiency is improved. According to the fan blade welding device, the welding accuracy and consistency are guaranteed, fan blade pretreatment and correction functions are creatively integrated, fan blade deformation generated in the manufacturing and conveying process can be effectively corrected, and it is guaranteed that all fan blades are consistent in shape before welding and are matched with the curvature of a welding ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, in particular to an automatic welding device for heat dissipation fan processing. BACKGROUND

[0002] The heat dissipation fans on the market can be mainly divided into two categories of plastic and metal. Compared with plastic fans, metal fans occupy an important position in high-end and heavy-load heat dissipation application fields due to their higher strength and toughness. However, the manufacturing process of metal fans, especially the assembly link of fan blades and fan welding rings, faces a series of severe challenges.

[0003] The traditional metal fan blades are fixed by welding, and this process essentially introduces new and unpredictable asymmetric mass distribution to the assembly. Any slight welding quality deviation will be dramatically amplified when the fan rotates at high speed, causing severe vibration. For high-speed fans, such vibration is not only a noise source, but also a core safety hazard leading to fan blade rupture, motor burnout and other fatal failures. Therefore, how to realize accurate and consistent welding of multiple fan blades on the welding ring is the primary problem to ensure product dynamic balance and reliability. Based on this, an automatic welding device for heat dissipation fan processing is proposed. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide an automatic welding device for heat dissipation fan processing.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: An automatic welding device for heat dissipation fan processing, comprising a welding assembly table carrying a laser welding head, a multi-degree-of-freedom control element is arranged on the welding assembly table for driving the laser welding head to adjust the welding angle, and a synchronous positioning welding element for standard positioning of the fan blades is connected to the welding assembly table; The welding assembly table is connected with a welding assembly base through a rotating control element, a supporting inner ring body is arranged above the welding assembly base, a high-frequency heating device for high-temperature pretreatment of the fan blades is arranged inside the supporting inner ring body, a welding ring positioning pad is arranged above the supporting inner ring body for positioning the fan welding ring, a correction drive motor is arranged in the welding assembly table, and a correction assembly for shaping treatment of the fan blades is connected to the output end of the correction drive motor; The welding assembly base is connected with a fan blade positioning base ring through a telescopic limiting element, a plurality of welding clamping openings matched with the fan blades are formed in the fan blade positioning base ring, an electromagnetic adsorption layer for magnetic attraction positioning of the fan blades is arranged at the welding clamping opening, and a displacement transfer ring is connected to the welding assembly table through a station conversion element, the displacement transfer ring is arranged in the fan blade positioning base ring and used for pushing the fan blades to move upward.

[0006] As a preferred scheme, the synchronous positioning welding part comprises a bearing horizontal slide provided on the welding assembly table, the multi-degree-of-freedom control part is provided at the end of the bearing horizontal slide, and the laser welding head is provided on the multi-degree-of-freedom control part. The bottom of the bearing horizontal slide is provided with an L-shaped synchronous moving seat, the end of the L-shaped synchronous moving seat is provided with a positioning disc, and the welding assembly table is provided with a control cylinder for controlling the movement of the L-shaped synchronous moving seat.

[0007] As a preferred scheme, the correction assembly comprises a torsion pressure bearing ring connected with the output end of the correction driving motor, a torsion pressure rod is rotationally arranged on the outer wall of the torsion pressure bearing ring, a pressing connecting rod is rotationally arranged at the end of the torsion pressure rod, and a hot pressing forming part is arranged at the end of the pressing connecting rod.

[0008] As a preferred scheme, the telescopic limiting part comprises a limiting sliding opening formed in the welding assembly base, a limiting rod is arranged at the bottom of the leaf positioning base ring, the limiting rod extends downwardly through the limiting sliding opening and is fixedly connected with a limiting clamping block.

[0009] As a preferred scheme, the station conversion part comprises an annular cavity formed in the inside of the leaf positioning base ring, the displacement transfer ring is arranged in the annular cavity and is connected with the inner wall of the annular cavity through a connecting spring, a station conversion push rod is arranged on the welding assembly table, and the station conversion push rod is connected with the displacement transfer ring through a connecting support rod which sequentially penetrates the welding assembly table and the welding assembly base.

[0010] As a preferred scheme, a sliding groove is formed in the displacement transfer ring, and a bottom supplementary sliding strip is connected with the inner wall of the sliding groove through a spring sliding block.

[0011] As a preferred scheme, an extended protruding clamping block is arranged on the leaf positioning base ring at the welding clamping opening, and a welding positioning opening matched with the leaf is formed in the positioning disc.

[0012] As a preferred scheme, the rotation control part comprises a rotation motor arranged on the welding assembly table, a rotation gear ring is arranged on the outer sidewall of the welding assembly base, and a rotation gear fixedly connected with the rotation gear ring is connected with the output end of the rotation motor.

[0013] Compared with the prior art, the present application has the following advantages: 1、The synchronous positioning welding part and the welding positioning opening ensure that each leaf can be tightly combined with the fan welding ring during welding and the length of each leaf is consistent, which solves the problems of welding cavities and inconsistent lengths caused by poor combination from the root, and the visual recognition device and the multi-degree-of-freedom control part enable the laser welding head to flexibly adjust the angle and accurately follow the welding track, further ensuring the accuracy and consistency of welding.

[0014] 2. This invention softens the root of the fan blades using a high-frequency heating device, and then uses a hot-pressing molding tool to extrude and shape the fan blades. It innovatively integrates fan blade pretreatment and correction functions, which can effectively correct fan blade deformation caused during manufacturing and transportation, ensuring that all fan blades have a consistent shape before welding and match the curvature of the welding ring. This lays the foundation for high-quality welding, reduces the scrap rate caused by incoming material deformation, and ensures that the fan blades are of consistent length and fit tightly after welding. It fundamentally reduces the uneven mass distribution caused by welding asymmetry, thereby greatly improving the dynamic balance performance of the cooling fan at high speed. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an automatic welding device for processing cooling fans proposed in this invention; Figure 2 This is a schematic diagram of the structure and assembly of an automatic welding device for processing cooling fans proposed in this invention. Figure 3 This is a schematic diagram of the internal structure of the welding assembly base in an automatic welding device for processing cooling fans proposed in this invention. Figure 4 This is a schematic diagram of the cross-sectional structure of the fan blade positioning base ring in an automatic welding device for processing a cooling fan proposed in this invention. Figure 5 This is a schematic diagram of the installation state structure of the welding assembly base in an automatic welding device for processing a cooling fan proposed in this invention. Figure 6 This is a schematic diagram of the welding assembly base in an automatic welding device for processing cooling fans proposed in this invention; Figure 7 This is a schematic diagram of the structure of the displacement transfer ring in an automatic welding device for processing a cooling fan proposed in this invention.

[0016] In the diagram: 1. Welding assembly table; 2. Laser welding head; 3. Multi-degree-of-freedom control component; 4. Welding assembly base; 5. Support inner ring; 6. High-frequency heating device; 7. Welding ring positioning pad; 8. Correction drive motor; 9. Fan blade positioning base ring; 10. Welding locking port; 11. Displacement transfer ring; 12. Bearing horizontal slide; 13. L-shaped synchronous moving seat; 14. Torsional bearing ring; 15. Torsional pressure bar; 16. Pressing connecting rod; 17. Hot-pressed molded part; 18. Limiting sliding port; 19. Limiting rod; 20. Limiting block; 21. Annular cavity; 22. Station conversion push rod; 23. Connecting support rod; 24. Sliding groove; 25. Bottom supplementary slide bar; 26. Extension protruding block; 27. Welding positioning port; 28. Rotating motor; 29. ​​Rotating gear ring; 30. Positioning plate. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example, refer to Figures 1 to 7 An automatic welding device for processing cooling fans. The assembly includes a welding assembly table 1 carrying a laser welding head 2. The welding assembly table 1 is equipped with a multi-degree-of-freedom control component 3, which is used to control the laser welding head 2 to rotate at multiple angles. It is also equipped with a vision recognition device that can flexibly adjust according to the welding position of the fan blade. This is existing technology and will not be described in detail here. The laser welding head 2 is used to adjust the welding angle. The welding assembly table 1 is connected to a synchronous positioning welding component for standard positioning of the fan blade. Furthermore, the synchronous positioning welding component includes a load-bearing horizontal slide 12 slidably disposed on the welding assembly table 1, a multi-degree-of-freedom control component 3 disposed at the end of the load-bearing horizontal slide 12, and a laser welding head 2 disposed on the multi-degree-of-freedom control component 3. The load-bearing horizontal slide 12 is used to drive the welding device to move horizontally, thereby achieving the effect of horizontal position adjustment. The bottom of the load-bearing horizontal slide 12 is provided with an L-shaped synchronous moving seat 13, and the end of the L-shaped synchronous moving seat 13 is provided with a positioning plate 30. The positioning plate 30 can be detachably installed on the L-shaped synchronous moving seat 13. The welding assembly table 1 is provided with a control cylinder for controlling the movement of the L-shaped synchronous moving seat 13. The control cylinder is used to control the horizontal movement of the load-bearing horizontal slide 12. Furthermore, an extended protruding locking block 26 is provided on the fan blade positioning base ring 9 located at the welding locking port 10, and a welding positioning port 27 adapted to the fan blade is provided on the positioning plate 30. The welding positioning port 27 is set at the tip of the fan blade to match, which can ensure that the fan blade has pressure that fits the fan welding ring at all times when welding, and can ensure that the blade length of each blade is consistent after welding, thereby ensuring the dynamic balance of the cooling fan during rotation.

[0021] The welding assembly table 1 is connected to the welding assembly base 4 via a rotation control component. A supporting inner ring 5 is provided above the welding assembly base 4. A high-frequency heating device 6 for high-temperature pretreatment of the fan blades is provided inside the supporting inner ring 5. A welding ring positioning pad 7 for positioning the fan welding ring is provided above the supporting inner ring 5. The high-frequency heating device 6 is located inside the inner ring 5 of the support and also inside the torsion bearing ring 14. It heats the root of the nearby fan blade through electromagnetic induction, so that after heating, it can be shaped by the pressure generated by the hot pressing molding part 17 to ensure the consistency of the fan blade shape during welding.

[0022] The welding assembly table 1 is equipped with a correction drive motor 8. The output end of the correction drive motor 8 is connected to a correction component for shaping the fan blades. The correction component includes a torsion bearing ring 14 connected to the output end of the correction drive motor 8. A torsion pressure rod 15 is rotatably provided on the outer wall of the torsion bearing ring 14. A pressing connecting rod 16 is rotatably provided at the end of the torsion pressure rod 15. A hot-pressed plastic part 17 is provided at the end of the pressing connecting rod 16. The hot-pressed plastic part 17 is annular, and its annular curvature is the same as that of the fan welding ring. This ensures that the fan blades after being shaped by the hot-pressed plastic part 17 can fit with the fan welding ring, ensuring a good fit during welding.

[0023] The welding assembly base 4 is connected to the fan blade positioning base ring 9 via a telescopic limiting component. Furthermore, the telescopic limiting component includes a limiting sliding opening 18 opened in the welding assembly base 4. A limiting rod 19 is provided at the bottom of the fan blade positioning base ring 9. The limiting rod 19 extends downward through the limiting sliding opening 18 and is fixedly connected to a limiting block 20.

[0024] The fan blade positioning base ring 9 has multiple welding clamping slots 10 adapted to the fan blades. The welding clamping slots 10 are equipped with an electromagnetic adsorption layer for magnetic positioning of the fan blades. When the electromagnetic adsorption layer is energized, it generates a strong magnet, thereby fastening the fan blades in the welding clamping slots 10 to ensure the fastening effect during the pre-forming process. The welding assembly table 1 is connected to a displacement transfer ring 11 through a station conversion component. The displacement transfer ring 11 is set inside the fan blade positioning base ring 9 and is used to push the fan blades upward.

[0025] Furthermore, the workstation conversion component includes an annular cavity 21 formed inside the fan blade positioning base ring 9, a displacement transfer ring 11 located inside the annular cavity 21 and connected to the inner wall of the annular cavity 21 via a connecting spring, a workstation conversion push rod 22 provided on the welding assembly table 1, and the workstation conversion push rod 22 connected to the displacement transfer ring 11 via a connecting support rod 23 that passes through the welding assembly table 1 and the welding assembly base 4 in sequence; a sliding groove 24 is formed on the displacement transfer ring 11, and a bottom supplementary sliding strip 25 is connected to the inner wall of the sliding groove 24 via a spring slider; It should be noted that when the displacement transfer ring 11 moves upward, it will drive the fan blade in the welding locking port 10 to move upward. During the upward movement of the fan blade, due to the characteristics of the inclined surface of the fan blade, relative sliding will occur between the fan blade and the displacement transfer ring 11. By providing a sliding bottom supplementary slide bar 25 on the displacement transfer ring 11, a sliding connection can be achieved, so as not to affect the sliding of the fan blade.

[0026] A further advantage of the above is that when the displacement transfer ring 11 moves upward, it will drive the fan blade positioning base ring 9, which is connected to it by a connecting spring, to move upward, thereby transporting the fan blade that was originally in the heating pretreatment area to the welding treatment area. Due to the restriction of the limit rod 19, the fan blade positioning base ring 9 cannot move after it has been moved into place. The displacement transfer ring 11 will move upward relative to the fan blade positioning base ring 9, driving the fan blade that has been pre-corrected in the welding locking port 10 to move upward.

[0027] Furthermore, the rotation control component includes a rotation motor 28 mounted on the welding assembly table 1, a rotation gear ring 29 mounted on the outer wall of the welding assembly base 4, and a rotation gear meshing with the rotation gear ring 29 fixedly connected to the output end of the rotation motor 28. Driven by the rotation motor 28, the welding assembly base 4 can be rotated, thereby facilitating the laser welding head 2 to perform welding processing on each pair of fan blades. The station conversion component enables rapid and precise switching between the pretreatment station and the welding station, improving the continuity and efficiency of production. This invention uses a conveying robot to place the fan blades to be welded one by one into the welding clamping slots 10 on the fan blade positioning base ring 9. After pre-assembly, the consistency correction of the fan blades is activated. Power is supplied through the electromagnetic adsorption layer set at the welding clamping slot 10, causing the welding clamping slot 10 to generate magnetic force. Under the action of magnetic force, the fan blades are fastened in the welding clamping slot 10. The high-frequency heating device 6 set in the inner support ring 5 is then activated. At this time, the root of the fan blade near the high-frequency heating device 6 is rapidly heated. At the same time, the correction drive motor 8 is turned on, which drives the torsion bearing ring 14 to rotate slowly. During the rotation, the torsion bearing ring 14 will exert pressure on the torsion pressure rod 15, which will drive the hot pressing plastic part 17 connected to the pressing connecting rod 16 to move outward, thereby squeezing the heated fan blade root. Under the pressure of the hot pressing plastic part 17, the fan blade root will be squeezed. During the squeezing and shaping, when the fan blade root is deformed, the deformation of the fan blade root can be effectively corrected. After the fan blades are straightened, the connecting support rod 23 moves upward via the station conversion push rod 22, which in turn moves the displacement transfer ring 11 connected to it upward. As the displacement transfer ring 11 moves upward, it moves the fan blade positioning base ring 9, which is connected to it via a connecting spring, upward. This transports the fan blades, which were originally in the preheating treatment area, upward to the welding treatment area. Due to the restriction of the limit rod 19, the fan blade positioning base ring 9 cannot move after it has been moved into place. At this time, the displacement transfer ring 11 continues to move upward under the drive of the station conversion push rod 22. During this process, the displacement transfer ring 11 moves upward relative to the fan blade positioning base ring 9, driving the pre-straightened fan blades, which are located in the welding clamping port 10, upward. When the fan blade moves upward, it will be locked at the extended protruding block 26 set at the welding locking port 10. At this time, the fan welding ring is installed on the welding ring positioning pad 7. The load-bearing horizontal slide 12 is controlled to drive the welding device to move horizontally. The L-shaped synchronous moving seat 13 moves, and the welding positioning port 27 on the positioning plate 30 at its end will contact the end of the fan blade. The welding positioning port 27 can ensure that the fan blade has pressure that fits the fan welding ring at all times when welding. The multi-degree-of-freedom control component 3 will drive the laser welding head 2 to adjust the angle and flexibly adjust according to the welding position of the fan blade. At this time, the laser welding head 2 will achieve effective welding between the fan blade and the fan welding ring according to the predetermined trajectory.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic welding device for processing cooling fans, comprising a welding assembly table (1) carrying a laser welding head (2), characterized in that, The welding assembly table (1) is equipped with a multi-degree-of-freedom control component (3) for driving the laser welding head (2) to adjust the welding angle. The welding assembly table (1) is connected to a synchronous positioning welding component for standard positioning of the fan blade. The welding assembly table (1) is connected to the welding assembly base (4) via a rotation control component. A supporting inner ring (5) is provided above the welding assembly base (4). A high-frequency heating device (6) for high-temperature pretreatment of the fan blades is provided inside the supporting inner ring (5). A welding ring positioning pad (7) for positioning the fan welding ring is provided above the supporting inner ring (5). A correction drive motor (8) is provided inside the welding assembly table (1). A correction component for shaping the fan blades is connected to the output end of the correction drive motor (8). The welding assembly base (4) is connected to the fan blade positioning base ring (9) through a telescopic limiting component. The fan blade positioning base ring (9) has multiple welding locking ports (10) adapted to the fan blade. The welding locking ports (10) are provided with an electromagnetic adsorption layer for magnetic positioning of the fan blade. The welding assembly table (1) is connected to the displacement transfer ring (11) through a workstation conversion component. The displacement transfer ring (11) is set inside the fan blade positioning base ring (9) and is used to push the fan blade to move upward.

2. The automatic welding device for processing cooling fans according to claim 1, characterized in that, The synchronous positioning welding component includes a load-bearing horizontal slide (12) that is slidably disposed on the welding assembly table (1), the multi-degree-of-freedom control component (3) is disposed at the end of the load-bearing horizontal slide (12), and the laser welding head (2) is disposed on the multi-degree-of-freedom control component (3); The bottom of the bearing horizontal slide (12) is provided with an L-shaped synchronous moving seat (13), and the end of the L-shaped synchronous moving seat (13) is provided with a positioning plate (30). The welding assembly table (1) is provided with a control cylinder for controlling the movement of the L-shaped synchronous moving seat (13).

3. The automatic welding device for processing cooling fans according to claim 1, characterized in that, The correction assembly includes a torsion bearing ring (14) connected to the output end of the correction drive motor (8). A torsion pressure rod (15) is rotatably provided on the outer wall of the torsion bearing ring (14). A pressing connecting rod (16) is rotatably provided at the end of the torsion pressure rod (15). A hot-pressed molding part (17) is provided at the end of the pressing connecting rod (16).

4. The automatic welding device for processing cooling fans according to claim 1, characterized in that, The telescopic limiting component includes a limiting sliding port (18) opened in the welding assembly base (4), and a limiting rod (19) is provided at the bottom of the fan blade positioning base ring (9). The limiting rod (19) extends downward through the limiting sliding port (18) and is fixedly connected to the limiting block (20).

5. The automatic welding device for processing cooling fans according to claim 1, characterized in that, The workstation conversion component includes an annular cavity (21) opened inside the fan blade positioning base ring (9). The displacement transfer ring (11) is located inside the annular cavity (21) and is connected to the inner wall of the annular cavity (21) by a connecting spring. The welding assembly table (1) is provided with a workstation conversion push rod (22). The workstation conversion push rod (22) is connected to the displacement transfer ring (11) by a connecting support rod (23) that passes through the welding assembly table (1) and the welding assembly base (4) in sequence.

6. The automatic welding device for processing cooling fans according to claim 1, characterized in that, The displacement transfer ring (11) is provided with a sliding groove (24), and the inner wall of the sliding groove (24) is connected to a bottom supplementary slide bar (25) through a spring slider.

7. The automatic welding device for processing cooling fans according to claim 1, characterized in that, An extension protrusion (26) is provided on the fan blade positioning base ring (9) located at the welding locking port (10), and a welding positioning port (27) adapted to the fan blade is provided on the positioning disk (30).

8. An automatic welding device for processing cooling fans according to claim 2, characterized in that, The rotation control component includes a rotation motor (28) mounted on the welding assembly table (1), a rotation gear ring (29) is provided on the outer wall of the welding assembly base (4), and a rotation gear that meshes with the rotation gear ring (29) is fixedly connected to the output end of the rotation motor (28).

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