A multi-angle welding platform for fan impellers

Abstract

The present invention discloses a multi-angle welding platform for fan impellers, which belongs to the technical field of fan impeller welding and comprises a workbench, a welding table is installed on the workbench, and a clamping assembly is installed on the workbench, the clamping assembly comprises a clamping plate arranged above the welding table, a plurality of guide holes for placing blades are provided on the clamping plate, a limiting member is installed on the clamping plate, and the limiting member is driven to limit the blades in each guide hole at the same time; the multi-angle welding platform provided by the present invention, by arranging a clamping plate above the welding table, and providing the clamping plate with guide holes with the same number as the number of blades of the impeller, all the blades can be placed in each guide hole on the clamping plate at one time before welding, and fixed to the clamping plate by the limiting member arranged on the clamping plate, which improves the work efficiency and avoids the problem of blade misalignment caused by fixing the blades in batches.

Description

Technical Field

[0001] The invention relates to the technical field of fan impeller welding, and specifically discloses a fan impeller multi-angle welding platform. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge the gas. It is a driven fluid machine and is widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings. The impeller, as the main component of the fan, is divided into closed impellers, semi-open impellers and open impellers. The blade shape is divided into flat blades, arc narrow blades, arc blades, etc. The blades and cover plates are generally connected by welding.

[0003] For example, the patent with announcement number CN118060833B, with announcement date of 2024-07-05, discloses a multi-angle welding table for fan impeller and its use method, including a fixed frame and a feeding assembly, including a first electric push rod arranged on one side of the fixed frame, two drive boxes are rotatably installed in the adjustment box, and a first clamping plate and a second clamping plate are slidably installed on the bottom wall of the drive box respectively; a detection assembly includes a first rangefinder arranged on the outer wall of the first clamping plate away from the adjustment box, and a second rangefinder is fixedly installed on the outer wall of the second clamping plate away from the adjustment box. A positioning ring is sleeved at the center of the fan housing, and a detection ring is provided on the top wall of the positioning ring. The fan blades are automatically clamped into the fan housing through the cooperation of the first clamping plate and the second clamping plate, and the fan blades are positioned before clamping and during the conveying process, and the angle calibration is performed after the fan blades are placed on the fan housing, so as to further ensure the correctness of the welding position and improve the accuracy and quality of welding.

[0004] The disadvantage of the existing welding platforms including the above-mentioned patent is that when the existing welding platforms are processed, after the cover plate is fixed, the blades need to be fixed and welded one by one, which is cumbersome to operate. In addition, since the blades are fixed in batches, the blades are easily misplaced during the operation, making it difficult to ensure that the blades are evenly distributed on the cover plate. Summary of the invention

[0005] The object of the present invention is to provide a fan impeller multi-angle welding platform which is simple to operate and has high welding efficiency.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-angle welding platform for a fan impeller is used to weld multiple blades to a cover plate, comprising a workbench, a welding table for fixing the cover plate is installed on the workbench, and a clamping assembly and a mechanical arm for automatic welding are installed on the workbench. The clamping assembly comprises a clamping plate arranged above the welding table, the welding table is located below the clamping plate, a plurality of groups of guide holes for placing blades are provided on the clamping plate, a limiting member is installed on the clamping plate, and the limiting member is driven to limit the blades in each guide hole at the same time.

[0008] The above-mentioned welding platform, the limiting member includes a limiting plate rotatably mounted on the lower part of the clamping plate, and the position of the limiting plate corresponding to the guide hole is provided with a first limiting hole, and the cross-section shape of the first limiting hole and the guide hole is the same.

[0009] The above-mentioned welding platform and the position of the limiting plate on the inner wall of the first limiting hole are all provided with rubber pads.

[0010] The above-mentioned welding platform has a limit plate rotatably installed at the lower end of the clamping plate, and a guide plate is also installed below the clamping plate. Second limit holes are opened at positions corresponding to the guide holes on the guide plate. The cross-sections of the second limit hole and the guide hole are also the same. The limit plate is arranged between the guide plate and the clamping plate.

[0011] The above-mentioned welding platform and the clamping plate are rotatably installed above the welding table.

[0012] The welding platform is circular and rotatably mounted on the upper surface of the workbench.

[0013] The above-mentioned welding platform and the surface of the limit plate corresponding to the lower end of the guide hole are provided with a rubber pad.

[0014] The above-mentioned welding platform has a driving assembly on the workbench, and the driving assembly drives the clamping plate and the welding table to rotate synchronously.

[0015] The above-mentioned welding platform has a circular hole in the middle of the welding table, and the part of the welding table in the circular hole is slidably installed with multiple groups of support blocks. The support blocks can slide along the radial direction of the welding table, and the support blocks are driven to retract into the welding table to enable automatic unloading of the cover plate.

[0016] The above-mentioned welding platform has an electric push rod installed inside the clamping plate, the lower end of the electric push rod extends to the lower part of the clamping plate, the guide plate is fixedly connected to the lower end of the electric push rod, the lower surface of the limit plate is fixedly connected to an adjustment block, the adjustment block has a guide inclined surface, and the positions of the guide plate corresponding to the adjustment blocks are provided with through grooves matching the adjustment blocks, and the positions of the clamping plate corresponding to the limit plate are installed with torsion springs, which maintain the relative angle between the limit plate and the clamping plate so that the first limit hole is directly opposite to the guide hole.

[0017] In the above technical scheme, the multi-angle welding platform provided by the present invention is equipped with a clamping plate above the welding table, and a number of guide holes equal to the number of blades of the impeller are opened on the clamping plate. Before welding, all the blades can be placed in the guide holes on the clamping plate at one time, and fixed to the clamping plate by the limiting members arranged on the clamping plate. This improves the work efficiency and avoids the problem of blade misalignment caused by fixing the blades in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A front view of a workbench provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a workbench provided by an embodiment of the present invention;

[0021] Figure 3 A cross-sectional view of a workbench provided by an embodiment of the present invention;

[0022] Figure 4 A top view of a workbench provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a welding table provided in an embodiment of the present invention installed on a workbench;

[0024] Figure 6 A schematic diagram of the positional relationship between a welding table and a workbench provided in an embodiment of the present invention;

[0025] Figure 7 A cross-sectional view of a welding station provided by an embodiment of the present invention;

[0026] Figure 8 A top view of the clamping plate, the limiting plate and the guide plate in an exploded state provided by an embodiment of the present invention;

[0027] Fig. 9 A bottom view of the clamping plate, the limiting plate and the guide plate in an exploded state provided in an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Workbench; 11. Support frame; 2. Welding table; 21. Round hole; 22. Support block; 221. Adjustment hole; 23. Long slot; 231. First spring; 24. Wedge block; 25. Clearance hole; 3. Clamping plate; 31. Guide hole; 32. Limiting plate; 321. First limiting hole; 322. Adjustment block; 3221. Guide slope; 323. Arc slot; 33. Guide plate; 331. Second limiting hole; 332. Through slot; 333. Guide rod; 34. Electric push rod; 35. Through hole; 4. Robotic arm; 5. Drive assembly; 51. Motor; 52. Rotating shaft; 521. First gear; 522. First gear ring; 523. Second gear; 524. Second gear ring; 6. Conveyor; 7. Elastic member; 71. Limiting rod; 72. Second spring. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1-Figure 9 As shown, an embodiment of the present invention provides a fan impeller multi-angle welding platform, which is used to weld multiple blades to a cover plate, including a workbench 1, on which a welding table 2 for fixing the cover plate is installed, and a clamping assembly and a robot arm 4 for automatic welding are installed on the workbench 1, the clamping assembly includes a clamping plate 3, the welding table 2 is located below the clamping plate 3, the clamping plate 3 is provided with multiple groups of guide holes 31 for placing blades, and a limiting member is installed on the clamping plate 3, and the limiting member is driven to limit the blades in each guide hole 31 at the same time.

[0033] Specifically, the welding platform is used to fix the blades and cover plates during the welding of the fan impeller. The workbench 1 is the main structure of the welding platform, and a welding platform 2 is installed on the upper part of the workbench 1. A clamping assembly is arranged above the welding platform 2 on the workbench 1. Figures 1 to 3 As shown, the clamping assembly includes a clamping plate 3 arranged above the welding table 2, a support frame 11 is fixedly connected to the workbench 1, the upper end of the support frame 11 extends above the welding table 2, and the outer wall of the clamping plate 3 is connected to the support frame 11, so that a space between the clamping plate 3 and the welding table 2 is reserved for placing blades, and the clamping plate 3 is used to fix the blades to ensure that the blades will not be displaced relative to the cover plate during welding; the clamping plate 3 is cylindrical, and a plurality of groups of guide holes 31 are provided on the clamping plate 3, and the plurality of groups of guide holes 31 are arranged in a circular array with the central axis of the clamping plate 3 as the center, and each guide hole 31 is opened along the axial direction of the clamping plate 3, and in addition, a limit member is also provided on the clamping plate 3, and the limit member is driven to move and At the same time, the blades in each guide hole 31 are restricted on the clamping plate 3 to ensure that each blade cannot be relatively displaced during welding to the cover plate. Obviously, in order to ensure that the blade can be smoothly fixed to the clamping plate 3 by the limiting member after being placed in the guide hole 31, the distance between the lower surface of the clamping plate 3 and the cover plate needs to be smaller than the axial dimension of the blade along the cover plate; in addition, the welding table 2 is provided with an electric-controlled clamp for limiting the cover plate. It is an existing technology to use an electric-controlled clamp to clamp a disc-shaped workpiece, which can be directly applied without further elaboration. In addition, a robot arm 4 for automatic welding is also installed on the workbench 1. It is an existing technology to use the robot arm 4 for automatic welding, which can be directly applied without further elaboration.

[0034] It should be noted that the present embodiment is applicable to the welding of an open impeller or a partial welding step of a semi-open impeller. Since the blades of the impeller are divided into flat blades, arc narrow blades, arc blades, etc. according to different actual use environments, the shape of the guide hole 31 in the present application corresponds to a flat blade. When welding blades of other shapes, the shape of the corresponding guide hole 31 can be designed according to actual needs.

[0035] During processing, the cover plate is placed on the welding table 2, the central axis of the cover plate and the clamping disk 3 are kept coincident, and the cover plate is fixed on the welding table 2 by the above-mentioned electric control clamp, that is, the cover plate is placed directly below the clamping disk 3, and it is ensured that the central axis of the cover plate and the clamping disk 3 coincide. Then, the blades are placed one by one in the corresponding guide holes 31 from above the clamping disk 3. The blades move down under the action of their own gravity until they contact the cover plate. After the placement of each blade is completed, the limit member is driven to act, so that the limit member is actuated to simultaneously restrict the blades in each guide hole 31 in the guide hole 31, that is, the preparation work before welding is completed. For the placement of the blades, manual or automatic loading can be used. This is a prior art and will not be elaborated.

[0036] The multi-angle welding platform provided in the embodiment of the present invention is configured by arranging a clamping plate 3 above the welding table 2, and opening guide holes 31 on the clamping plate 3, the number of which is the same as the number of blades of the impeller. Before welding, all the blades can be placed in the guide holes 31 on the clamping plate 3 at one time, and fixed to the clamping plate 3 by the limiting members arranged on the clamping plate 3. This improves the work efficiency and avoids the problem of blade misalignment caused by fixing the blades in batches.

[0037] Furthermore, the limiting member includes a limiting plate 32 rotatably mounted on the lower part of the clamping plate 3 , and first limiting holes 321 are provided at positions corresponding to the guide holes 31 on the limiting plate 32 , and the cross-sections of the first limiting holes 321 and the guide holes 31 are the same.

[0038] Specifically, in order to facilitate the synchronous fixing of the blades on the clamping plate 3, a limit plate 32 is rotatably installed at the lower part of the clamping plate 3, such as Figure 1 , Figure 2 , Figure 3 , Figure 8 and Fig. 9 As shown, first limiting holes 321 are provided at positions corresponding to the guide holes 31 on the limiting disk 32, and the cross section of the first limiting holes 321 is the same as that of the guide holes 31; during the loading process of the blades, the limiting disk 32 is driven to rotate, and the angle of the limiting disk 32 is adjusted so that the first limiting holes 321 and the guide holes 31 are opposite to each other (first angle), so as to ensure that the blades can smoothly pass through the first limiting holes 321 and contact the cover plate; when the blades are placed in each guide hole 31, the limiting disk 32 is driven to rotate so that the first limiting holes 321 and the guide holes 31 are partially staggered (second angle), thereby clamping the blades; obviously, in order to avoid the limiting disk 32 from pushing the blades to tilt when rotating, in some embodiments, the limiting disk 32 can be arranged inside the clamping disk 3, that is, the guide holes 31 on the clamping disk 3 are divided into upper and lower sections by the limiting disk 32, so that when the limiting disk 32 rotates, the parts of the blades on the upper and lower sides of the limiting disk 32 can be restricted by the guide holes 31, thereby preventing the blades from tilting.

[0039] In specific implementation, in order to ensure that the blade can smoothly pass through the guide hole 31, the size of the guide hole 31 will be slightly larger than the size of the blade during design to reduce the resistance when the blade passes through. Therefore, the limit plate 32 can also push the blade to move and fit tightly against the inner wall of the guide hole 31 during the process of rotating from the above-mentioned first angle to the second angle, that is, the blade will be corrected to a certain extent in position before being fixed.

[0040] Preferably, rubber pads are provided on the inner wall of the first limiting hole 321 on the limiting plate 32. The provision of the rubber pads increases the friction between the limiting plate 32 and the blades, thereby improving the fixing effect of the blades, and the provision of the rubber pads prevents the blades from being deformed due to excessive force.

[0041] Furthermore, the limit plate 32 is rotatably installed at the lower end of the clamping plate 3, and a guide plate 33 is also installed below the clamping plate 3. A second limit hole 331 is opened at the position corresponding to the guide hole 31 on the guide plate 33. The cross-sectional shapes of the second limit hole 331 and the guide hole 31 are also the same. The limit plate 32 is arranged between the guide plate 33 and the clamping plate 3.

[0042] Specifically, during the welding process, a certain space needs to be reserved for welding, and usually only the end of the blade away from the cover plate is limited. In the above embodiment, in order to prevent the blade from tilting, the limit plate 32 needs to be arranged inside the clamping plate 3, which is inconvenient for the installation and maintenance of the limit plate 32. In this embodiment, the limit plate 32 is rotatably installed on the lower end of the clamping plate 3, and a guide plate 33 is installed below the clamping plate 3. The guide plate 33 is provided with a second limit hole 331 at a position corresponding to the guide hole 31, and the limit plate 32 is arranged between the guide plate 33 and the clamping plate 3. In the process of limiting the blade, the limit plate 32 squeezes the upper end of the blade, so that the upper end of the blade can contact the lower end inner wall of the guide hole 31 and the inner wall of the second limit hole 331, thereby preventing the blade from tilting.

[0043] In another embodiment provided by the present invention, the clamping plate 3 is rotatably installed above the welding table 2.

[0044] Furthermore, the welding table 2 is circular, and is rotatably mounted on the upper surface of the workbench 1 , and the robot arm 4 is mounted on one side of the welding table 2 .

[0045] Specifically, in order to improve the degree of automation in the impeller production process, in this embodiment, the clamping disc 3 is rotatably connected to the upper end of the support frame 11. During specific implementation, a feeding mechanism (not shown in the figure) can be set on the workbench 1. The feeding mechanism has a discharge position above the clamping disc 3. The feeding mechanism transports the blades to the discharge position in a vertical posture. At the same time, the clamping disc 3 is driven to rotate to continuously adjust its angle so that each guide hole 31 can pass under the discharge position. The blades transported by the feeding mechanism fall freely when reaching the discharge position and fall into the guide holes 31 below the discharge position, thereby realizing automatic loading. Using a feeding mechanism to transport the blades to a specific position and release the blades is a prior art such as a robot.

[0046] In addition, in this embodiment, Figure 4 and Figure 6As shown, the welding table 2 is circular and rotatably mounted on the upper surface of the workbench 1, and a robotic arm 4 is mounted on the upper surface of the workbench 1 at one side of the welding table 2. After the cover plate is fixed on the welding table 2 and each blade is fixed on the clamping plate 3, the robotic arm 4 automatically welds each blade. During the welding process, the welding table 2 and the clamping plate 3 are driven to rotate synchronously so that the next group of blades to be welded can be adjusted to the working range of the robotic arm 4.

[0047] In another embodiment provided by the present invention, a rubber pad is provided on the surface of the limiting plate 32 corresponding to the lower end of the guide hole 31 .

[0048] Specifically, in the above embodiment, after the blade is placed in the guide hole 31, it will fall downward along the guide hole 31 until it contacts the cover plate. The resulting impact will cause damage to the blade, especially the blade with a smaller thickness, and the clamping plate 3 needs to be rotated to adjust the position of each guide hole 31 so that each guide hole 31 passes under the above unloading position in turn. During this process, the placed blade will slide along the surface of the cover plate driven by the clamping plate 3. Since only the upper end of the blade is in the guide hole 31, when the friction between the lower end of the blade and the cover plate is too large, it is easy to cause the blade to deform. In this embodiment, a rubber pad is provided on the upper surface of the limit plate 32. Before the blade is placed in the guide hole 31, the limit plate 32 is driven to rotate so that the first limit hole 321 and the guide hole 3 1 cross (this state is the third angle of the limiting plate 32), at this time, the limiting plate 32 blocks the lower end of each guide hole 31, and the blades placed in each guide hole 31 are blocked by the limiting plate 32 and cannot continue to move down. When the guide holes 31 are all filled with blades, the limiting plate 32 is driven to rotate in the opposite direction, so that the first limiting holes 321 correspond to the guide holes 31 one by one, and the blades will fall down to contact the cover plate under the action of gravity, and then the limiting plate 32 is driven to rotate, so that the limiting plate 32 cooperates with the clamping plate 3 and the guide plate 33 to clamp the upper end of the blade; such a configuration can, on the one hand, divide the falling of the blade into two stages, thereby preventing the blade from being damaged by excessive impact force, and on the other hand, it can prevent the blade from being damaged by friction with the cover plate when the clamping plate 3 rotates.

[0049] In another embodiment provided by the present invention, a driving assembly 5 is provided on the workbench 1, and the driving assembly 5 drives the clamping plate 3 and the welding table 2 to rotate synchronously.

[0050] Specifically, in order to ensure that the clamping plate 3 and the welding table 2 can rotate synchronously to avoid displacement of the blade relative to the cover plate, in this embodiment, a driving assembly 5 is provided on the workbench 1, and the driving assembly 5 can drive the clamping plate 3 and the welding table 2 to rotate synchronously. Optionally, the driving assembly 5 includes a motor 51 installed on the workbench 1, and a rotating shaft 52 is rotatably installed on the above-mentioned support frame 11. The rotating shaft 52 is arranged parallel to the central axis of the clamping plate 3, and the upper end of the rotating shaft 52 is fixedly connected to a first gear 521. The outer surface of the clamping plate 3 A first gear ring 522 is mounted, the first gear 521 meshes with the first gear ring 522, and a second gear 523 is mounted in the middle of the rotating shaft 52, and a second gear ring 524 is mounted on the outside of the welding table 2, the second gear 523 meshes with the second gear ring 524, and the lower end of the rotating shaft 52 is connected to the output shaft of the motor 51. Since the clamping disk 3 needs to rotate intermittently during the process of placing the blade into the clamping disk 3, an intermittent transmission mechanism such as a grooved wheel mechanism can be added between the motor 51 and the rotating shaft 52 during specific implementation.

[0051] In another embodiment provided by the present invention, a circular hole 21 is opened in the middle of the welding table 2, and a plurality of groups of support blocks 22 are slidably installed on the part of the welding table 2 in the circular hole 21. The support blocks 22 can slide along the radial direction of the welding table 2, and the support blocks 22 are driven to retract into the welding table 2 to realize automatic unloading of the cover plate.

[0052] Specifically, in order to facilitate the removal of the welded cover plate from the welding table 2 and further improve the processing efficiency, in this embodiment, Figure 5 and Figure 6 As shown, a circular hole 21 is provided in the middle of the welding table 2, and the size of the circular hole 21 is larger than the diameter of the cover plate to be welded, and a plurality of groups of support blocks 22 are slidably installed on the part of the welding table 2 that is in the circular hole 21, and the support blocks 22 are all in the shape of long strips, and the plurality of groups of support blocks 22 are arranged in a circular array with the central axis of the welding table 2 as the center, and a long groove 23 for installing the support block 22 is provided on the welding table 2, and the long groove 23 is arranged one by one with the support block 22; when the support block 22 extends into the circular hole 21, it is in the supporting state of the support block 22, and the cover plate placed in the circular hole 21 can be supported by the support block 22, and when the welding is completed, the support blocks 22 are driven to shrink synchronously into the welding table 2, and at this time, the cover plate will fall into the workbench 1 without support, thereby realizing automatic unloading, and in specific implementation, the belt conveyor 6 can be made to pass through the workbench 1, that is, even if the conveyor 6 is Figure 1In the view, the workbench 1 is horizontally passed through, and the workbench 1 passes directly under the circular hole 21, and the fallen cover plate can directly fall onto the conveyor belt surface of the conveyor 6 and be transported; for the drive of the support block 22, optionally, an electric push rod is provided in each long groove 23, and the electric push rod is arranged along the length direction of its corresponding support block 22, and the output end of the electric push rod is fixedly connected to one end of the support block 22 in the long groove 23, so that the electric push rod is used to pull its corresponding support block 22 to slide to the inside of the welding table 2.

[0053] Furthermore, an electric push rod 34 is installed inside the clamping disk 3, and the lower end of the electric push rod 34 extends to the lower part of the clamping disk 3. The guide disk 33 is fixedly connected to the lower end of the electric push rod 34. An adjusting block 322 is fixedly connected to the lower surface of the limit disk 32. The adjusting block 322 has a guide inclined surface 3221. The position of the guide disk 33 corresponding to the adjusting block 322 is provided with a through groove 332 that cooperates with the adjusting block 322. A torsion spring is installed at the position of the clamping disk 3 corresponding to the limit disk 32. The torsion spring maintains the relative angle between the limit disk 32 and the clamping disk 3 so that the first limit hole 321 is opposite to the guide hole 31.

[0054] Specifically, in this embodiment, a cylindrical cavity is opened in the middle of the clamping disk 3, and an electric push rod 34 is fixedly installed in the cavity. The lower end of the electric push rod 34 extends to the bottom of the clamping disk 3, the middle of the guide disk 33 is fixedly connected to the lower end of the electric push rod 34, and the lower surface of the limit disk 32 is fixedly connected to an adjustment block 322. Fig. 9 As shown, the adjustment block 322 is arc-shaped, and a guiding inclined surface 3221 is provided on the adjustment block 322, and a through slot 332 cooperating with the adjustment block 322 is provided at a corresponding position on the guide plate 33. In addition, a torsion spring is installed at a position corresponding to the limit plate 32 on the clamping plate 3, and the torsion spring maintains the relative angle between the limit plate 32 and the clamping plate 3. When the torsion spring is in a natural state, the first limit hole 321 corresponds to the guide hole 31 one by one, that is, the limit plate 32 is at the above-mentioned first angle; to ensure that the through slot 332 can always cooperate with the adjustment block 322, the guide plate 33 is provided with a through slot 332 cooperating with the adjustment block 322. A guide rod 333 is fixedly connected to 33, and a through hole 35 is opened at a position corresponding to the guide rod 333 on the clamping plate 3, and the upper end of the guide rod 333 extends into the corresponding through hole 35. In order to prevent the setting of the guide rod 333 from affecting the rotation of the limit plate 32, an arc groove 323 is opened on the limit plate 32 along its own axial direction, and the center of the arc groove 323 coincides with the central axis of the limit plate 32. The arc groove 323 and the guide rod 333 are set in a one-to-one correspondence, and the guide rod 333 passes through the corresponding arc groove 323 and extends into the through hole 35.

[0055] Before placing the blade into the guide hole 31, the electric push rod 34 contracts and pulls the guide plate 33 to move toward the limit plate 32. During this process, the adjustment block 322 extends into the corresponding through groove 332. Since the guide inclined surface 3221 of the adjustment block 322 contacts the groove wall of the through groove 332, as the distance between the guide plate 33 and the limit plate 32 shortens, the adjustment block 322 is squeezed by the guide plate 33 and drives the limit plate 32 to rotate, and rotates from the first angle to the third angle, so that the blades can be placed one by one in the corresponding guide hole 31; after the blades are placed, the electric push rod 34 extends and drives the guide plate 33 away from the limit plate 3 2. The limit plate 32 is driven by the torsion spring to return to the first angle from the third angle. When the limit plate 32 returns to the first angle, the blade passes through the first limit hole 321 and the second limit hole 331 in sequence from the guide holes 31 until it contacts the cover plate. At this time, part of the upper end of the blade is still in the guide hole 31, and the electric push rod 34 contracts again and pulls the guide plate 33 to move toward the limit plate 32. The limit plate 32 rotates under the drive of the adjustment block 322 to adjust the limit plate 32 to the second angle. At this time, the electric push rod 34 is in a semi-contracted state, that is, in this state, there is a certain distance between the guide plate 33 and the limit plate 32.

[0056] Furthermore, if Figure 7 As shown, a first spring 231 is installed in the long groove 23, one end of the first spring 231 is connected to one end of the support block 22 in the long groove 23, and the other end of the first spring 231 is fixedly connected to the inner wall of the long groove 23. When the first spring 231 is in a natural state, the end of the support block 22 extends into the circular hole 21, that is, the support block 22 is in a supporting state, and a wedge block 24 is installed at the position corresponding to the support block 22 on the welding platform 2. The lower part of the wedge block 24 is provided with an inclined surface, and the inclined surface of the lower part of the wedge block 24 is away from the circular hole 21 on the welding platform 2, that is, the inclined surface of the wedge block 24 is arranged along the radial direction of the welding platform 2 toward the outer side of the welding platform 2, and the welding platform 2 is opened along its own axial direction. A clearance hole 25 is provided, and an adjustment hole 221 for matching the wedge block 24 is provided on the support block 22. An elastic member 7 for maintaining the relative position of the wedge block 24 and the welding table 2 is also provided on the welding table 2. Optionally, the elastic member 7 includes a limiting rod 71 fixed to the welding table 2, and the upper end of the limiting rod 71 passes through the wedge block 24, and the upper end of the limiting rod 71 is formed with an annular protrusion along its own circumference. A second spring 72 is mounted on the limiting rod 71. When the second spring 72 is in a natural state, the wedge block 24 is above the support block 22, and a part of the wedge block 24 is directly below the guide plate 33, so that the guide plate 33 can push the wedge block 24 to move when it is driven to move downward.

[0057] The guide plate 33 has a first height, a second height, a third height and a fourth height within a travel range in which it is driven to move along its own axial direction, wherein the first height is higher than the second height, the second height is higher than the third height, and the third height is higher than the fourth height:

[0058] When at the first height, the guide plate 33 contacts the limiting plate 32, and at this time, the limiting plate 32 is at the third angle;

[0059] When at the second height, the guide plate 33 is separated from the limiting plate 32, and at this time, a part of the adjusting block 322 is still in the through slot 332 on the guide plate 33, and the limiting plate 32 is at the second angle;

[0060] When at the third height, the adjusting block 322 is completely moved out of the through slot 332, and the limiting plate 32 is at the first angle.

[0061] When at the fourth height, the guide plate 33 pushes the wedge block 24 to move down to the lowest point. In this state, the limit plate 32 is at the above-mentioned first angle. At the same time, the wedge block 24 pushes the support block 22 to retract into the welding table 2.

[0062] During welding, the guide plate 33 is at the second height. After the welding of the cover plate and the blades is completed, the electric push rod 34 extends to drive the guide plate 33 to move to the third height. During this process, the torsion spring drives the guide plate 33 to reset until the first limit hole 321 is aligned with the guide hole 31 one by one. At this time, the blade is no longer clamped, and the electric push rod 34 continues to extend and drives the guide plate 33 to move to the fourth height. During this process, the guide plate 33 contacts the wedge block 24 and pushes the wedge block 24 downward, and the wedge block 24 extends into the adjustment hole opened on the support block 22. In the hole 221, when the lower end of the wedge block 24 passes through the adjustment hole 221, the inclined surface on the wedge block 24 pushes the support block 22 to retract into the inside of the welding table 2, thereby canceling the support of the support block 22 for the cover plate, so that the cover plate automatically falls to the conveyor belt surface of the conveyor 6, thereby realizing automatic unloading; in this way, the movement of the guide plate 33 drives the limit plate 32 to rotate to release the clamping of the blade, and can also drive the support block 22 to retract into the inside of the welding table 2, so as to cancel the support of the support block 22 for the cover plate, realize automatic unloading, and further improve the processing efficiency.

[0063] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fan impeller multi-angle welding platform, which is used to weld multiple blades to a cover plate, comprising a workbench, a welding table for fixing the cover plate is installed on the workbench, and a clamping assembly and a mechanical arm for automatic welding are installed on the workbench, characterized in that: The clamping assembly includes a clamping plate arranged above the welding table, the welding table is located below the clamping plate, and a plurality of guide holes for placing blades are provided on the clamping plate. A limiting member is installed on the clamping plate, and the limiting member is driven to limit the blades in each guide hole at the same time. The limiting member includes a limiting plate rotatably installed at the lower part of the clamping plate, and a first limiting hole is opened at the position corresponding to the guide hole on the limiting plate, and the cross-section shape of the first limiting hole and the guide hole is the same. The limiting plate is rotatably installed at the lower end of the clamping plate, and a guide plate is also installed below the clamping plate, and a second limiting hole is opened at the position corresponding to the guide hole on the guide plate, and the cross-section shape of the second limiting hole and the guide hole is also the same. The limiting plate is arranged between the guide plate and the clamping plate, and the clamping plate is rotatably installed above the welding table, and a support frame is fixedly connected to the workbench, and the upper end of the support frame extends above the welding table, and the outer wall of the clamping plate is rotatably connected to the support frame. The welding table is circular, and the welding table is rotatably installed The guide plate is fixedly connected to the lower end of the electric push rod, and the lower surface of the limit plate is fixedly connected to the lower surface of the limit plate, and the adjusting block has a guide inclined surface, and the position of the guide plate corresponding to the adjusting block is provided with a through groove matching the adjusting block, and the position of the clamping plate corresponding to the limit plate is provided with a torsion spring, and the torsion spring maintains the relative angle between the limit plate and the clamping plate so that the first limit hole is opposite to the guide hole, and a circular hole is provided in the middle of the welding table, and a plurality of groups of support blocks are slidably installed on the part of the welding table that is in the circular hole, and the support block can slide along the radial direction of the welding table, and when the electric push rod moves the guide plate downward, the support block is driven by the downward movement of the guide plate, and the support block shrinks into the welding table, so that the cover plate is automatically unloaded, and the adjusting block is squeezed by the guide plate to drive the limit plate to rotate.

2. The fan impeller multi-angle welding platform according to claim 1, characterized in that: Rubber pads are arranged on the inner wall of the first limiting hole on the limiting plate.

3. The fan impeller multi-angle welding platform according to claim 1, characterized in that: A rubber pad is arranged on the surface of the lower end of the limiting plate corresponding to the guide hole.

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