A welding tool for manufacturing a ventilation fan and a welding method thereof

Abstract

The application belongs to the technical field of fan manufacturing welding, and discloses a welding tool for manufacturing ventilation fans and a welding method thereof, which comprises a machine table, a first L-shaped frame is vertically installed on the top of the machine table, an automatic feeding assembly and a clamping assembly are arranged on a rotating body, a placing table is arranged above the machine table, an F-shaped frame is vertically installed on the top of the machine table, a welding bearing plate is arranged above the machine table, mounting plates are symmetrically installed on the bottom of the machine table, a second L-shaped frame is installed on the bottom of the machine table, and a fixing assembly is connected to the second L-shaped frame, wherein the welding tool for manufacturing ventilation fans and the welding method thereof are provided with an arc-shaped track guide body, a rectangular lifting column, a clamping frame and a first tension spring, workers position and clamp blades in the clamping frame, the rectangular lifting column drives the clamping frame to drive the blades to move downwards to the outside of a fixed wheel disc on the top of the placing table, and then the blades are welded on the wheel disc, so that the labor intensity of workers is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of welding technology in fan manufacturing, specifically to a welding fixture and welding method for manufacturing ventilation fans. Background Technology

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a type of driven fluid machinery and is widely used in many fields such as industry, agriculture, construction, and transportation. The impeller is the core component of the fan. It performs work on the gas by rotating, converting mechanical energy into the kinetic and pressure energy of the gas. The shape, number, and installation angle of the blades will affect the performance of the fan. Welding is required in the impeller production process.

[0003] Chinese Patent CN117139968B discloses a positioning fixture for wind turbine impeller processing, relating to the field of wind turbine impeller processing and positioning technology. The fixture includes a base; a support seat mounted on the base, on which a support platform for fixing the wind turbine impeller is rotatably mounted. Two brackets are bolted to the base, and a pushing component for rotating the support platform is mounted on the brackets. A positioning component for positioning the wind turbine impeller is mounted at the bottom of the support platform. A clamping mechanism mounted on the base is used for clamping and positioning the blades. This invention uses a designed clamping mechanism to clamp and position the blades, facilitating welding the blades onto the impeller. The clamping plate within the clamping mechanism moves up and down, coordinating with a linkage to move the pushing frame within the pushing component. Each time the clamping plate moves up and down, the support platform can be adjusted at equal angles, facilitating the equal-angle positioning and welding of multiple blades.

[0004] However, the aforementioned patent has the following shortcomings: The patent uses a clamping mechanism to clamp and position the blades, making it convenient for personnel to weld the blades onto the wheel. The clamping plate in the clamping mechanism moves up and down, and in conjunction with the action of the linkage, the push frame in the push component moves accordingly. Thus, each rise and fall of the clamping plate adjusts the support platform at an equal angle, making it convenient to weld multiple blades at equal angles. However, in the production process, after each blade is welded, the worker needs to fix the next blade in the clamping seat and then send the fixed blade back to the outside of the wheel for welding. This results in low welding efficiency and increases the labor intensity of the workers. Therefore, it needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to provide a welding fixture and welding method for manufacturing ventilation fans, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for manufacturing ventilation fans, comprising a machine base, a first L-shaped frame vertically mounted on the top of the machine base, a rotating body rotatably mounted on the top of the first L-shaped frame, an automatic feeding component and a clamping component being provided on the rotating body, a placement platform being provided above the machine base, a quantitative rotating component being connected to the placement platform, an F-shaped frame vertically mounted on the top of the machine base, a power transmission component being provided on the F-shaped frame, a welding bearing plate being provided above the machine base, an automatic welding component being provided on the welding bearing plate, mounting plates symmetrically mounted at the bottom of the machine base, a drive transmission component being provided between the mounting plates, and a second L-shaped frame being mounted at the bottom of the machine base, a fixing component being connected to the second L-shaped frame;

[0007] The automatic feeding assembly includes rectangular lifting columns. Multiple rectangular lifting columns slide vertically through the top of the rotating body. Each of the through-ends of the rectangular lifting columns is equipped with a clamping frame. Each clamping frame is symmetrically equipped with a first tension spring. The top of each first tension spring is fixedly installed at the bottom of the rotating body. Each of the rectangular lifting columns is rotatably equipped with a first roller. An arc-shaped track guide is fixedly installed at the top of the first L-shaped frame. The arc-shaped track guide is used to push the rectangular lifting columns.

[0008] By adopting the above technical solution, the blades are positioned sequentially and then automatically welded, thus improving welding efficiency.

[0009] As a further aspect of the present invention: the clamping assembly includes a magnetic clamping block, two magnetic clamping blocks are arranged in the clamping frame, and guide posts are installed on the sides of the magnetic clamping blocks that are far apart from each other. The ends of the guide posts slide through the clamping frame, and a first reset spring is sleeved on the outer side of the guide posts located inside the clamping frame.

[0010] By adopting the above technical solution, the positioning and clamping of the blades were achieved.

[0011] As a further embodiment of the present invention: the quantitative rotating component includes a support shaft, the support shaft is vertically installed at the bottom of the placement platform, the bottom of the support shaft rotates through the machine platform, a passive bevel gear is fixedly installed at the bottom of the support shaft, and a defective bevel gear meshes with the outside of the passive bevel gear.

[0012] By adopting the above technical solution, the quantitative angle of rotation of the placement stage and the rotating body was synchronized.

[0013] As a further embodiment of the present invention: the power transmission assembly includes a connecting shaft, the connecting shaft is vertically rotatably mounted on the F-shaped frame, a second gear is fixedly mounted on the top of the connecting shaft, the second gear meshes with a first gear ring, the first gear ring is fixedly sleeved on the outside of the rotating body, a first gear is mounted on the bottom of the connecting shaft, the first gear meshes with a second gear ring, and the second gear ring is fixedly sleeved on the outside of the placement platform.

[0014] By adopting the above technical solution, synchronous drive rotation of the placement platform and the rotating body was achieved.

[0015] As a further aspect of the present invention: the automatic welding assembly includes a reciprocating column, a reciprocating column is vertically installed at the bottom of the welding support plate, the bottom of the reciprocating column slides through the machine base, a first eccentric wheel is provided at the bottom of the reciprocating column, welding arms are installed at both ends of the welding support plate, welding gun heads are installed on the side of the welding arm ends that are close to each other, a second tension spring is vertically installed at the bottom of each welding arm, and the bottom of the second tension spring is fixedly installed on the top of the machine base.

[0016] By adopting the above technical solution, automatic welding of blades was achieved.

[0017] As a further aspect of the present invention: the drive transmission assembly includes a drive rod, which is laterally rotatably mounted between two mounting plates. A second eccentric wheel is fixedly mounted on the drive rod, and a broken bevel gear and a first eccentric wheel are fixedly mounted on each drive rod. A drive motor is mounted on the outer wall of the mounting plate, and the drive rod is driven by the drive motor.

[0018] By adopting the above technical solution, the coordinated operation of various components on the machine tool was achieved.

[0019] As a further embodiment of the present invention: the fixing component includes a circular disk and an insertion rod. The circular disk is fixedly connected to the bottom of the support shaft. Multiple fixing holes are opened at the bottom of the circular disk. The insertion rod slides vertically through the second L-shaped frame. A second limiting body is installed at the bottom of the insertion rod. A second return spring is sleeved on the outside of the insertion rod. The second return spring is located at the top of the second limiting body. A first limiting body is installed on the outside of the insertion rod away from the second limiting body. The top of the insertion rod is inserted into the fixing hole.

[0020] By adopting the above technical solution, the placement platform is fixed, increasing the stability during the welding process.

[0021] As a further aspect of the present invention: multiple support legs are vertically installed at the bottom of the placement platform, and each support leg is rotatably equipped with a second roller.

[0022] By adopting the above technical solution, the stability of the placement platform rotation is improved, ensuring the strength of the weld.

[0023] A welding method for a welding fixture used in the manufacture of a ventilation fan, the welding method employing the aforementioned welding fixture for the manufacture of a ventilation fan, includes the following steps:

[0024] Multiple blades are sequentially positioned and clamped into each clamping frame. The drive motor drives the relevant components to operate in conjunction. The rotating body sequentially places the blades clamped at the bottom of the rectangular lifting column into the top of the placement platform. The placement platform is fixed by inserting the insertion rod into the fixing hole. Then, the blades are welded by the upward-moving welding gun head.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention comprises an arc-shaped track guide, rectangular lifting columns, a clamping frame, and a first tension spring. The blades are positioned and clamped within the clamping frame. Rotating the rotating body drives each rectangular lifting column. When the first roller mounted on the top of the moving rectangular lifting column contacts the bottom of the arc-shaped track guide, the shape of the arc-shaped track guide indirectly pushes the rectangular lifting column downwards. During this downward movement, the clamping frame moves downwards, causing the blades to move to the outside of a wheel fixed at the top of the placement platform. The blades are then welded to the wheel. After welding, the rotating body continues to rotate, and the tension of the first tension spring resets the rectangular lifting columns. The use of multiple rectangular lifting columns in coordination reduces worker labor intensity and improves production efficiency.

[0027] This invention includes a first toothed ring, a second toothed ring, a first gear, and a second gear. During the rotation of the placement platform at a certain angle, the placement platform drives the second toothed ring to rotate, the second toothed ring drives the first gear to rotate, the first gear drives the second gear mounted on the top of the connecting shaft to rotate, and the second gear drives the first toothed ring to rotate during its rotation. The first toothed ring drives the rotating body to rotate, ensuring that the placement platform and the rotating body rotate synchronously. The blades on the rotating body are synchronized with the wheel placed on the top of the placement platform, ensuring that the interval and angle between each blade welded to the wheel are consistent.

[0028] This invention includes a reciprocating column, a first eccentric wheel, a welding arm, and a welding torch. When the blade is placed outside the wheel, the rotating first eccentric wheel pushes the reciprocating column upwards. The reciprocating column then moves the welding support plate and welding arm upwards, driving the welding equipment connected to the welding torch to move upwards. The two upward-moving welding torches simultaneously weld both sides of the blade. The reciprocating column is reset by the tension of a second tension spring. By using the two welding torches to weld both sides of the blade, the welding strength is improved, and automatic welding is achieved. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a bottom view of the arc-shaped track guide and the rectangular lifting column in this invention.

[0031] Figure 3This is a bottom view of the structure of the placement platform and the rotating body in this invention;

[0032] Figure 4 This is a bottom view of the rotating body, rectangular lifting column, and clamping frame in this invention.

[0033] Figure 5 This is a schematic diagram of the rectangular lifting column, clamping frame, and first tension spring in this invention;

[0034] Figure 6 This is a schematic diagram of the internal structure of the clamping frame in this invention;

[0035] Figure 7 This is a bottom view of the structure of the machine base in this invention;

[0036] Figure 8 This is a schematic diagram of the reciprocating column, welding arm, and welding torch head in this invention;

[0037] Figure 9 This is a schematic diagram of the structure of the drive motor, drive rod, incomplete bevel gear and first eccentric wheel in this invention.

[0038] In the diagram: 1. Machine base; 2. Placement platform; 3. First L-shaped frame; 4. Rotating body; 5. Arc-shaped track guide; 6. Welded bearing plate; 7. F-shaped frame; 8. Rectangular lifting column; 9. Clamping frame; 10. First tension spring; 11. Second roller; 12. First gear ring; 13. Second gear ring; 14. First gear; 15. Connecting shaft; 16. Second gear; 17. First roller; 18. Magnetic clamping block; 19. First return spring; 20. Guide column; 21. 21. Reciprocating column; 22. Second tension spring; 23. Support shaft; 24. Mounting plate; 25. Drive motor; 26. Drive rod; 27. Passive bevel gear; 28. Incomplete bevel gear; 29. ​​First eccentric wheel; 30. Second eccentric wheel; 31. Circular disc; 32. Welding arm; 33. Second L-shaped frame; 34. Insertion rod; 35. Second return spring; 36. Fixing hole; 37. Welding torch head; 38. First limiting body; 39. Support leg; 40. Second limiting body. Detailed Implementation

[0039] 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.

[0040] Please see Figures 1-9The present invention provides a technical solution: a welding fixture for manufacturing ventilation fans, including a machine base 1, a first L-shaped frame 3 vertically mounted on the top of the machine base 1, a rotating body 4 rotatably mounted inside the top of the first L-shaped frame 3, an automatic feeding component and a clamping component being provided on the rotating body 4, a placement platform 2 being provided above the machine base 1, a quantitative rotating component being connected to the placement platform 2, an F-shaped frame 7 vertically mounted on the top of the machine base 1, a power transmission component being provided on the F-shaped frame 7, a welding bearing plate 6 being provided above the machine base 1, an automatic welding component being provided on the welding bearing plate 6, mounting plates 24 symmetrically mounted on the bottom of the machine base 1, a drive transmission component being provided between the two mounting plates 24, and a second L-shaped frame 33 being mounted on the bottom of the machine base 1, a fixing component being connected to the second L-shaped frame 33;

[0041] The automatic feeding assembly includes rectangular lifting columns 8. Multiple rectangular lifting columns 8 slide vertically through the top of the rotating body 4. Each through end of the rectangular lifting columns 8 is equipped with a clamping frame 9. Each clamping frame 9 is symmetrically equipped with a first tension spring 10. The top of each first tension spring 10 is fixedly installed at the bottom of the rotating body 4. Each rectangular lifting column 8 is rotatably equipped with a first roller 17. An arc-shaped track guide 5 is fixedly installed inside the top of the first L-shaped frame 3. The arc-shaped track guide 5 is used to push the rectangular lifting columns 8.

[0042] Specifically, the worker positions and fixes the blade within the clamping frame 9, then rotates the rotating body 4 to drive each rectangular lifting column 8. When the first roller 17 mounted on the top of the moving rectangular lifting column 8 contacts the bottom of the arc-shaped track guide 5, the shape of the arc-shaped track guide 5 indirectly pushes the rectangular lifting column 8 downward. During the downward movement of the rectangular lifting column 8, the clamping frame 9 moves downward, and the blade moves down to the top of the placement platform 2 for welding. After welding, the rotating body 4 continues to rotate, and the tension of the first tension spring 10 resets the rectangular lifting column 8. By cooperating with multiple rectangular lifting columns 8, the workload of workers is reduced and production efficiency is improved. The welding gun head 37 in this solution is connected to welding equipment, which is existing technology. The welding arm 32 is located at the bottom of the blade being welded and does not contact the bottom of the blade, so it will not obstruct the wheel adsorbed on the top of the placement platform 2 from rotating the blade.

[0043] Furthermore, the clamping assembly includes a magnetic clamping block 18. Two magnetic clamping blocks 18 are provided inside the clamping frame 9. Guide posts 20 are installed on the sides of the magnetic clamping blocks 18 that are far apart from each other. The ends of the guide posts 20 slide through the clamping frame 9. A first reset spring 19 is sleeved on the outside of the guide posts 20 inside the clamping frame 9.

[0044] Specifically, the worker positions and clamps the outer edge of the blade to be welded between two magnetic clamping blocks 18. The first reset spring 19 pushes the two magnetic clamping blocks 18 closer together to clamp the blade. Since both magnetic clamping blocks 18 are made of magnetic material, the clamping effect on the blade is improved. The guide post 20 restricts and guides the two magnetic clamping blocks 18. After the clamped blade is welded to the wheel, the clamping frame 9 moves upward under the tension of the first tension spring 10, and the clamping frame 9 gradually releases the clamp on the blade. The top of the placement platform 2 is equipped with a clamp for fixing the wheel.

[0045] Furthermore, the quantitative rotation component includes a support shaft 23, which is vertically installed at the bottom of the placement platform 2. The bottom of the support shaft 23 rotates through the machine base 1. A passive bevel gear 27 is fixedly installed at the bottom of the support shaft 23, and a defective bevel gear 28 meshes with the outside of the passive bevel gear 27.

[0046] Specifically, the drive motor 25 drives the drive rod 26 to rotate, the rotating drive rod 26 drives the incomplete bevel gear 28 to rotate, and the rotating incomplete bevel gear 28 drives the passive bevel gear 27 to rotate at a certain angle. The size of the meshing part of the incomplete bevel gear 28 and the passive bevel gear 27 is set according to the distance between the blades on the wheel, and it is also the key to driving the rotation angle of the placement platform 2 and the rotating body 4.

[0047] Furthermore, the power transmission assembly includes a connecting shaft 15, which is vertically rotatably mounted on the F-shaped frame 7. A second gear 16 is fixedly mounted on the top of the connecting shaft 15, and the second gear 16 meshes with the first gear ring 12. The first gear ring 12 is fixedly sleeved on the outside of the rotating body 4. A first gear 14 is mounted on the bottom of the connecting shaft 15, and the first gear 14 meshes with the second gear ring 13. The second gear ring 13 is fixedly sleeved on the outside of the placement platform 2.

[0048] Specifically, during the rotation of the placement platform 2 at a certain angle, the placement platform 2 drives the second gear ring 13 to rotate, the rotating second gear ring 13 drives the first gear 14 to rotate, the rotating first gear 14 drives the second gear 16 mounted on the top of the connecting shaft 15 to rotate, and the rotation of the second gear 16 drives the first gear ring 12 to rotate, which in turn drives the rotating body 4 to rotate, ensuring that the placement platform 2 and the rotating body 4 rotate synchronously. The blades on the rotating body 4 are synchronized with the wheel disk placed on the top of the placement platform 2, ensuring that the interval and angle between the blades welded to the wheel disk are consistent.

[0049] Furthermore, the automatic welding assembly includes a reciprocating column 21, a reciprocating column 21 is vertically mounted on the bottom of the welding support plate 6, the bottom of the reciprocating column 21 slides through the machine base 1, a first eccentric wheel 29 is provided at the bottom of the reciprocating column 21, welding arms 32 are installed at both ends of the welding support plate 6, welding gun heads 37 are installed on the side of the welding arms 32 that are close to each other, a second tension spring 22 is vertically mounted at the bottom of the welding arms 32, and the bottom of the second tension spring 22 is fixedly mounted on the top of the machine base 1;

[0050] Specifically, the blade is placed on the outer side of the wheel, and the rotating first eccentric wheel 29 pushes the reciprocating column 21 to move upward. The moving reciprocating column 21 drives the welding bearing plate 6 and the welding arm 32 to move upward, and then drives the welding equipment connected to the welding gun head 37 to move upward. The two moving welding gun heads 37 simultaneously weld both sides of the blade. The reciprocating column 21 is reset by the tension of the second tension spring 22, and both sides of the blade are welded, which improves the welding strength and realizes automatic welding.

[0051] Furthermore, the drive transmission assembly includes a drive rod 26, which is laterally rotatably mounted between two mounting plates 24. A second eccentric wheel 30 is fixedly mounted on the drive rod 26. A broken bevel gear 28 and a first eccentric wheel 29 are fixedly mounted on the drive rod 26. A drive motor 25 is mounted on the outer wall of the mounting plate 24, and the drive rod 26 is driven by the drive motor 25.

[0052] Specifically, the drive motor 25 drives the drive rod 26 to rotate, and the rotating drive rod 26 drives the incomplete bevel gear 28, the first eccentric wheel 29, and the second eccentric wheel 30 to rotate. The positions of the incomplete bevel gear 28, the first eccentric wheel 29, and the second eccentric wheel 30 on the drive rod 26 are adjusted according to requirements to ensure that the incomplete bevel gear 28 stops working immediately after driving the passive bevel gear 27. Then, the rotating drive rod 26 drives the second eccentric wheel 30 to move and push the insertion rod 34 upward, inserting the insertion rod 34 into the fixing hole 36 and holding it for a period of time. During the holding process, the second eccentric wheel 30 always does work on the insertion rod 34. Then, the rotating first eccentric wheel 29 pushes the reciprocating column 21 upward, providing conditions for welding.

[0053] Furthermore, the fixing assembly includes a circular disk 31 and an insertion rod 34. The circular disk 31 is fixedly connected to the bottom of the support shaft 23. The bottom of the circular disk 31 has multiple fixing holes 36. The insertion rod 34 slides vertically through the second L-shaped frame 33. A second limiting body 40 is installed at the bottom of the insertion rod 34. A second return spring 35 is sleeved on the outside of the insertion rod 34. The second return spring 35 is located at the top of the second limiting body 40. A first limiting body 38 is installed on the outside of the insertion rod 34 away from the second limiting body 40. The top of the insertion rod 34 is used to insert into the fixing hole 36.

[0054] Specifically, after the placement platform 2 has rotated, the second eccentric wheel 30 pushes the second limiting body 40 to move the insertion rod 34 upward and insert it into the fixing hole 36, thereby fixing the support shaft 23 and fixing the placement platform 2 and the rotating body 4 to ensure stability during the welding process. When the second eccentric wheel 30 releases its push on the second limiting body 40, the insertion rod 34 is reset by the elastic force of the second return spring 35, releasing the fixation on the circular disk 31, and thus releasing the fixation on the placement platform 2 and the rotating body 4.

[0055] Furthermore, multiple support legs 39 are vertically installed at the bottom of the placement platform 2, and each support leg 39 is rotatably equipped with a second roller 11 at its bottom;

[0056] Specifically, during the rotation of the rotating body 4, the placement platform 2 is supported by the support leg 39 vertically installed at the bottom of the rotating body 4. Since the support leg 39 is equipped with a second roller 11, the second roller 11 rotates on the upper part of the machine base 1, which improves the stability of the placement platform 2 during rotation and improves the stability of welding.

[0057] A welding method for a welding fixture used in the manufacture of a ventilation fan, the welding method employing the aforementioned welding fixture for the manufacture of a ventilation fan, includes the following steps:

[0058] Multiple blades are sequentially positioned and clamped into each clamping frame 9. The drive motor 25 drives the relevant components to operate in conjunction. The rotating body 4 sequentially places the blades clamped at the bottom of the rectangular lifting column 8 into the top of the placement platform 2. The placement platform 2 is fixed by inserting the insertion rod 34 into the fixing hole 36. Then, the blades are welded by the upward-moving welding gun head 37.

[0059] Working principle:

[0060] During operation, the wheel is fixed in the middle of the placement platform 2, and the blades are positioned and clamped in the clamping frame 9. The drive motor 25 is controlled to rotate, which drives the incomplete bevel gear 28, the second eccentric wheel 30, and the first eccentric wheel 29 to move in coordination. The incomplete bevel gear 28 drives the driven bevel gear 27 to rotate, which in turn drives the support shaft 23 to rotate. The rotation of the support shaft 23 drives the placement platform 2 to rotate, which in turn drives the second gear ring 13 to rotate. The rotating second gear ring 13 drives the first gear 14 to rotate, which in turn drives the second gear 16 mounted on the top of the connecting shaft 15 to rotate. During the rotation of the second gear 16, the first gear ring 12 is driven to rotate, which in turn drives the rotating body 4 to rotate, ensuring that the placement platform 2 and the rotating body 4 rotate synchronously. The blades on the rotating body 4 are synchronized with the wheel placed on the top of the placement platform 2. The rotating body 4 drives each rectangular lifting column 8 to run. When the first roller mounted on the top of the moving rectangular lifting column 8... 17 contacts the bottom of the arc-shaped track guide 5, and indirectly pushes the rectangular lifting column 8 downward through the shape of the arc-shaped track guide 5. During the downward movement of the rectangular lifting column 8, the clamping frame 9 moves downward. The clamping frame 9 drives the blade to move downward to the outside of the wheel fixed at the top of the placement platform 2. The second eccentric wheel 30 pushes the second limiting body 40 to drive the insertion rod 34 to move upward and insert it into the fixing hole 36, thereby fixing the support shaft 23. This achieves the fixation of the placement platform 2 and the rotating body 4. Then, the rotating first eccentric wheel 29 pushes the reciprocating column 21 upward. The reciprocating column 21 drives the welding bearing plate 6 and the welding arm 32 to move upward. Then, it drives the welding equipment connected to the welding gun head 37 to move upward. The two welding gun heads 37 move upward and weld the two sides of the blade simultaneously. The tension of the second tension spring 22 resets the reciprocating column 21. After the welding is completed, the rotating body 4 continues to rotate and perform cyclic operation. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0061] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention 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 limiting the scope of protection of the present invention.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding fixture for manufacturing a ventilation fan, comprising a machine base (1), characterized in that: The machine (1) is vertically mounted with a first L-shaped frame (3), and a rotating body (4) is rotatably mounted inside the first L-shaped frame (3). An automatic feeding component and a clamping component are provided on the rotating body (4). A placement platform (2) is provided above the machine (1). A quantitative rotating component is connected to the placement platform (2). An F-shaped frame (7) is vertically mounted on the top of the machine (1). A power transmission component is provided on the F-shaped frame (7). A welding bearing plate (6) is provided above the machine (1). An automatic welding component is provided on the welding bearing plate (6). Mounting plates (24) are symmetrically mounted on the bottom of the machine (1). A drive transmission component is provided between the mounting plates (24). A second L-shaped frame (33) is mounted on the bottom of the machine (1). A fixing component is connected to the second L-shaped frame (33). The automatic feeding assembly includes rectangular lifting columns (8), and multiple rectangular lifting columns (8) slide vertically through the top of the rotating body (4). Each of the through ends of the rectangular lifting columns (8) is equipped with a clamping frame (9). Each clamping frame (9) is symmetrically equipped with a first tension spring (10) on its top. The top of each first tension spring (10) is fixedly installed at the bottom of the rotating body (4). Each of the rectangular lifting columns (8) is rotatably equipped with a first roller (17). An arc-shaped track guide (5) is fixedly installed inside the top of the first L-shaped frame (3). The arc-shaped track guide (5) is used to push the rectangular lifting columns (8). The quantitative rotating assembly includes a support shaft (23). The support shaft (23) is vertically installed at the bottom of the placement platform (2). The bottom of the support shaft (23) rotates through the machine base (1). A passive bevel gear (27) is fixedly installed at the bottom of the support shaft (23). A defective bevel gear (28) meshes with the outside of the passive bevel gear (27). The power transmission assembly includes a connecting shaft (15), which is vertically rotatably mounted on an F-shaped frame (7). A second gear (16) is fixedly mounted on the top of the connecting shaft (15). The second gear (16) meshes with a first gear ring (12). The first gear ring (12) is fixedly sleeved on the outside of the rotating body (4). A first gear (14) is mounted on the bottom of the connecting shaft (15). The first gear (14) meshes with a second gear ring (13). The second gear ring (13) is fixedly sleeved on the outside of the placement platform (2). The automatic welding assembly includes a reciprocating column (21), the bottom of the welding support plate (6) is vertically mounted with the reciprocating column (21), the bottom of the reciprocating column (21) slides through the machine base (1), and the bottom of the reciprocating column (21) is fitted with a first eccentric wheel (29). The drive transmission assembly includes a drive rod (26), which is laterally rotatably mounted between two mounting plates (24). A second eccentric wheel (30) is fixedly mounted on the drive rod (26). A broken bevel gear (28) and a first eccentric wheel (29) are fixedly mounted on the drive rod (26). A drive motor (25) is mounted on the outer wall of the mounting plate (24). The drive rod (26) is driven by the drive motor (25).

2. The welding fixture for manufacturing a ventilation fan according to claim 1, characterized in that: The clamping assembly includes a magnet clamping block (18). Two magnet clamping blocks (18) are provided inside the clamping frame (9). Guide posts (20) are installed on the sides of the magnet clamping blocks (18) that are far apart from each other. The ends of the guide posts (20) slide through the clamping frame (9). A first reset spring (19) is sleeved on the outside of the guide posts (20) inside the clamping frame (9).

3. The welding fixture for manufacturing a ventilation fan according to claim 1, characterized in that: Welding arms (32) are installed at both ends of the welding support plate (6). Welding gun heads (37) are installed on the side of the welding arms (32) that are close to each other. A second tension spring (22) is installed vertically at the bottom of the welding arms (32), and the bottom of the second tension spring (22) is fixedly installed on the top of the machine base (1).

4. The welding fixture for manufacturing a ventilation fan according to claim 1, characterized in that: The fixing assembly includes a circular disc (31) and an insertion rod (34). The circular disc (31) is fixedly connected to the bottom of the support shaft (23). The circular disc (31) has multiple fixing holes (36) at its bottom. The insertion rod (34) slides vertically through the second L-shaped frame (33). A second limiting body (40) is installed at the bottom of the insertion rod (34). A second return spring (35) is sleeved on the outside of the insertion rod (34). The second return spring (35) is located at the top of the second limiting body (40). A first limiting body (38) is installed on the outside of the insertion rod (34) away from the second limiting body (40). The top of the insertion rod (34) is inserted into the fixing hole (36).

5. The welding fixture for manufacturing a ventilation fan according to claim 1, characterized in that: The bottom of the placement platform (2) is vertically equipped with multiple support legs (39), and the bottom of each support leg (39) is equipped with a second roller (11).

6. A welding method for a welding fixture used in manufacturing a ventilation fan, wherein the welding method employs the welding fixture for manufacturing a ventilation fan as described in claim 4, characterized in that, Includes the following steps: Multiple blades are positioned and clamped into each clamping frame (9) in sequence. The drive motor (25) is controlled to rotate. The blades clamped at the bottom of the rectangular lifting column (8) are placed into the top of the placement platform (2) in sequence through the rotating body (4). The placement platform (2) is fixed by inserting the insertion rod (34) into the fixing hole (36). Then the blades are welded by the upward-moving welding gun head (37).

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