An automatic welding device for producing centrifugal pump impellers

Abstract

The present invention relates to the field of laser welding technology, and specifically to an automatic welding device for producing centrifugal pump impellers, comprising a workbench, a flipping mechanism, a tensioning mechanism, a pressurizing mechanism, and a feeding mechanism. The present invention simultaneously performs corresponding welding work on two impellers through the opposite rotation effect of two flip plates, and ensures the position accuracy of the other cover plate when it is fixed through a connecting plate, thereby improving work efficiency while reducing welding errors, and through the exhaust effect of the compression bag when it is squeezed, injects air into the slide groove through the connecting groove, thereby forcing the connecting foot to slide along the slide groove, forcing the fixing plate to produce a downward pressure effect above the positioning plate, and an upward push effect above the chassis, thereby ensuring that the upper and lower cover plates can fit tightly together and ensuring stability after welding.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and in particular to an automatic welding device for producing centrifugal pump impellers. Background Art

[0002] The impeller of a centrifugal pump is an important working component inside the centrifugal pump. In the centrifugal pump, only the impeller rotates to suck the liquid from the center and pushes it outward along the blades, thereby increasing the static pressure and kinetic energy of the liquid. In the existing processing of impellers, laser welding is often used to evenly weld multiple blades between two cover plates to form a whole, which is the impeller.

[0003] In the existing welding process, workers often place the blades evenly in the grooves of the welding mold, and then press one of the cover plates onto the top of the blades. After laser welding, the welded part is transferred to another workpiece surface for fixation, and the other cover plate is placed on the other side of the blade for re-welding to form the final product. This working method is relatively slow, and due to the overall fixing method, tools need to be used to pry up the welded part after the initial welding, which can easily cause the cover plate to bend, affecting the sealing effect of the subsequent assembly of the impeller and affecting the overall working effect of the centrifugal pump. The fixing method is often to place a pressure plate on the top of the workpiece and then use the clamp to press and fix it. The placement of the pressure plate is manual, and there are errors within a certain range, which may cause inaccurate welds and cannot guarantee the fixing effect between the blades and the cover plate, which will also affect the operation of the centrifugal pump. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose an automatic welding device for producing centrifugal pump impellers.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] 14. The machine according to claim 13, wherein the plurality of laser welding machines are symmetrically arranged on the two sides of the workbench, and the plurality of laser welding machines are symmetrically arranged on the two sides of the workbench.

[0007] In the above-mentioned automatic welding device for producing centrifugal pump impellers, the flipping mechanism includes a rotating seat, a flip plate and a bevel gear. The two rotating seats are symmetrically fixedly connected to the middle of the top of the workbench. The top of the rotating seat is slidably connected to a connecting head, and the bottom of the connecting head is slidably connected to the inside of the rotating seat. The two flip plates are rotatably connected to the two connecting heads respectively. The surfaces of the opposite sides of the two flip plates are fixedly connected with connecting teeth. The bevel gear is rotatably connected to the top of the middle of the two connecting teeth, and the bevel gear is engaged with the two connecting teeth. The top of the rotating gear is fixedly connected to a motor, and the motor is arranged between the two flip plates. The surface of the motor is fixedly sleeved with a bracket, and the bottom end of the bracket is fixedly connected to the top of the workbench.

[0008] In the above-mentioned automatic welding device for producing centrifugal pump impellers, the tensioning mechanism includes a cylinder, a connecting column and a fixed plate. The two cylinders are respectively fixedly connected to one side of the surface of the two flip plates, one side of the surface of the fixed plate is fixedly connected to the connecting column, the connecting column and the flip plate are arranged through, and the connecting column and the flip plate are slidably connected, an expansion bag is arranged inside the connecting column, and three tensioning blocks are evenly fixedly connected to the surface of the expansion bag, the tensioning block is slidably connected to the fixed plate, and the tensioning block and the fixed plate are arranged through, the output end of the cylinder is connected with an air pipe, the other end of the air pipe is arranged through the end of the connecting column away from the tensioning block, and the end of the air pipe that passes through the inside of the connecting column is connected to one end of the expansion bag.

[0009] In the above-mentioned automatic welding device for producing centrifugal pump impellers, the pressurizing mechanism includes a telescopic cylinder, a compression bag and a connecting groove. The telescopic cylinder is fixedly connected to the top of the workbench, and the telescopic cylinder is located between the two rotating seats. A guide column is rotatably connected between the two connecting teeth, and the surface of the guide column is rotatably sleeved with a connecting sleeve. The bottom end of the connecting sleeve is fixedly connected to the output end of the telescopic cylinder, and the compression bag is arranged inside the rotating seat. The surface of the connecting head is located inside the rotating seat and is fixedly connected to the top of the compression bag. One side of the compression bag is connected to a conduit, and the other end of the conduit passes through the outside of the rotating seat and is connected to the connecting groove. The connecting groove is opened inside the flip plate, and three sliding grooves are evenly opened inside the flip plate. The three sliding grooves are distributed in a circular manner, and the connecting groove is connected to the three sliding grooves. Three connecting feet are evenly fixedly connected to the surface of the fixed plate and close to the side of the connecting column, and the connecting feet are slidably connected to the sliding groove.

[0010] In the above-mentioned automatic welding device for producing centrifugal pump impellers, the loading mechanism includes a hydraulic cylinder, a connecting plate and a fixed head. The hydraulic cylinder is rotatably connected to one side of the workbench, the connecting plate is fixedly connected to the output end of the hydraulic cylinder, the side of the connecting plate close to the chassis is fixedly connected to the fixed head, the interior of the fixed head is evenly slidably connected with three top blocks, and the top blocks and the fixed head are arranged through, an airbag is provided inside the fixed head, the three top blocks are all fixedly connected to the surface of the airbag, a small air pump is fixedly connected to the side of the connecting plate away from the fixed head, and the output end of the small air pump is connected to the airbag.

[0011] In the above-mentioned automatic welding device for producing centrifugal pump impellers, a plurality of material grooves are evenly opened on the surface of the positioning plate, and the material grooves are used to place the blades required for the impeller. The surface of the base plate is provided with grooves, and the grooves are slidably connected to the cylinder.

[0012] In the above-mentioned automatic welding device for producing centrifugal pump impellers, the surfaces of the flip plate, the fixing plate and the connecting plate are all provided with a plurality of positioning grooves, which are arranged corresponding to the positions of the material troughs.

[0013] In the above-mentioned automatic welding device for producing centrifugal pump impellers, four control arms are symmetrically fixedly connected to both sides of the workbench surface, and four laser welding machines are slidably connected to the workbench through the four control arms respectively.

[0014] Compared with the existing technology, the advantages of this automatic welding device for centrifugal pump impeller production are:

[0015] 1. Through the meshing effect between the bevel teeth and the connecting teeth, the two flip plates are driven to rotate in two opposite directions, so that the separate cover plates and the cover plates that have been welded to the blades are rotated to the top of the positioning plate and the chassis respectively. At the same time, the upper and lower cover plates of the two impellers are welded synchronously, which can greatly improve work efficiency.

[0016] 2. Use the flip plate, fixing plate and connecting plate to position and fix the upper and lower covers of the impeller respectively to ensure that the upper and lower covers of the impeller are fixed in place to prevent errors during welding;

[0017] 3. Through the exhaust effect when the compression bag is squeezed, air is injected into the slide groove through the connecting groove, thereby forcing the connecting foot to slide along the slide groove, forcing the fixing plate to produce a downward pressure effect on the top of the positioning plate, and an upward pressure effect on the top of the chassis, thereby ensuring that the upper and lower cover plates can fit tightly together and ensure stability after welding;

[0018] To sum up, the present invention performs corresponding welding work on the two impellers at the same time through the opposite rotation effect of the two flip plates, and ensures the position accuracy of the other cover plate when it is fixed through the connecting plate, thereby improving work efficiency and reducing welding errors. The effect between the connecting foot and the slide groove forces the fixed plate to press the cover plate, ensuring the close fit between the cover plate and the blades when combined, and ensuring the stability of the welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the chassis structure of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the rotating seat of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the connecting column of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the flip plate of the present invention;

[0024] Figure 6 It is a schematic diagram of the chute structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the workbench of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the connection disk of the present invention;

[0027] Figure 9 It is a schematic cross-sectional structural diagram of the fixing head of the present invention.

[0028] In the figure: 1. workbench; 2. positioning plate; 3. chassis; 4. laser welding machine; 5. turning mechanism; 501. rotating seat; 502. turning plate; 503. bevel gear; 6. tensioning mechanism; 601. cylinder; 602. connecting column; 603. fixed plate; 7. pressurizing mechanism; 701. telescopic cylinder; 702. compression bag; 703. connecting groove; 8. feeding mechanism; 801. hydraulic cylinder; 802. connecting plate; 803. fixed head; 9. connecting head; 10. connecting gear; 11. motor; 12. bracket; 13. expansion bag; 14. tensioning block; 15. air pipe; 16. guide column; 17. connecting sleeve; 18. guide tube; 19. slide; 20. connecting foot; 21. top block; 22. air bag; 23. small air pump; 24. trough; 25. groove; 26. positioning groove; 27. control arm DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0031] Reference Figures 1-9 , an automatic welding device for the production of centrifugal pump impellers, including a workbench 1, two positioning plates 2 are symmetrically fixedly connected to one side of the top of the workbench 1, and two chassis 3 are symmetrically fixedly connected to the other side of the top of the workbench 1. Four laser welding machines 4 are symmetrically arranged on both sides of the surface of the workbench 1, two of which are symmetrically arranged on both sides of the positioning plate 2, and the other two laser welding machines 4 are symmetrically arranged on both sides of the chassis 3. Four control arms 27 are symmetrically fixedly connected to the two sides of the surface of the workbench 1, and the four laser welding machines 4 are respectively slidably connected to the workbench 1 through the four control arms 27. A number of material troughs 24 are evenly opened on the surface of the positioning plate 2, and the material troughs 24 are used to place the blades required for the impeller. A groove 25 is opened on the surface of the chassis 3, and the groove 25 is slidably connected to the cylinder 601. The surfaces of the flip plate 502, the fixed plate 603 and the connecting plate 802 are all penetrated by a number of positioning grooves 26, and the positioning grooves 26 are arranged corresponding to the positions of the material troughs 24.

[0032] Among them, the blades to be welded are placed in several material troughs 24 in turn, and then a cover plate is driven to move to the top of the positioning plate 2 through the flip plate 502 and the fixed plate 603. After forcing the cover plate to contact the top of the blade, the laser welding machine 4 is driven to move to the top of the flip plate 502 through the control arm 27, and the cover plate and the blade are positioned by laser welding through the positioning groove 26 to ensure the stability of the welding.

[0033] The tensioning mechanism 6, the two tensioning mechanisms 6 are respectively slidably connected to the surfaces of the two flip mechanisms 5, the tensioning mechanism 6 is used to fix the cover plate of the impeller, the tensioning mechanism 6 includes a cylinder 601, a connecting column 602 and a fixed plate 603, the two cylinders 601 are respectively fixedly connected to one side of the surface of the two flip plates 502, one side of the surface of the fixed plate 603 is fixedly connected to the connecting column 602, the connecting column 602 is arranged through the flip plate 502, and the connecting column 602 is slidably connected to the flip plate 502, an expansion bag 13 is arranged inside the connecting column 602, three tensioning blocks 14 are evenly fixedly connected to the surface of the expansion bag 13, the tensioning block 14 is slidably connected to the fixed plate 603, and the tensioning block 14 is arranged through the fixed plate 603, the output end of the cylinder 601 is connected to the air pipe 15, the other end of the air pipe 15 is arranged through the end of the connecting column 602 away from the tensioning block 14, and the end of the air pipe 15 that passes through the inside of the connecting column 602 is connected to one end of the expansion bag 13.

[0034] Among them, air is transported into the expansion bag 13 through the air pipe 15 connected to the cylinder 601, forcing the expansion bag 13 to inflate, thereby pushing the three tensioning blocks 14 to slide toward the outside of the connecting column 602, and one of the cover plates required for the impeller is sleeved on the end of the connecting column 602 close to the fixed disk 603. The expansion effect generated by the three tensioning blocks 14 will force the cover plate to be fixed on the surface of the fixed disk 603, and the cover plate can be driven to move to the top of the positioning disk 2 through the flip plate 502, and the cover plate is forced to fit with the top of the blade, which facilitates the welding work.

[0035] The turning mechanism 5, the two turning mechanisms 5 are symmetrically connected to the middle part of the workbench 1, one turning mechanism 5 is located between a positioning plate 2 and the chassis 3, and the other turning mechanism 5 is located between the other positioning plate 2 and the chassis 3. The turning mechanism 5 is used to drive the impeller to turn over. The turning mechanism 5 includes a rotating seat 501, a turning plate 502 and a bevel gear 503. The two rotating seats 501 are symmetrically fixedly connected to the middle part of the top of the workbench 1. The top of the rotating seat 501 is slidably connected with a connecting head 9, and the bottom of the connecting head 9 is slidably connected to the inside of the rotating seat 501. The two turning plates 502 are rotatably connected to the two connecting heads 9 respectively. The surfaces of the opposite sides of the two turning plates 502 are fixedly connected with connecting teeth 10. The bevel gear 503 is rotatably connected to the top of the two connecting teeth 10, and the bevel gear 503 is engaged with the two connecting teeth 10. The top of the rotating tooth is fixedly connected with a motor 11. The motor 11 is arranged between the two turning plates 502. The surface of the motor 11 is fixedly sleeved with a bracket 12, and the bottom end of the bracket 12 is fixedly connected to the top of the workbench 1.

[0036] Among them, the motor 11 drives the bevel gear 503 to rotate, thereby driving the two flip plates 502 through the two connecting teeth 10 to produce an opposite rotation effect. The rotation of one flip plate 502 can move the cover plate that is not welded to the blade to the top of the blade for welding. The rotation of the other flip plate 502 will move the cover plate and blades that have been welded to the blade into an integral structure to the top of the bottom plate and weld them to the other cover plate. The two impellers can be fixed and welded at the same time, greatly improving the overall work efficiency.

[0037] The pressure mechanism 7 is arranged inside the flip mechanism 5. The flip mechanism 5 is used to assist the close fit between the impeller components. The pressure mechanism 7 includes a telescopic cylinder 701, a compression capsule 702 and a connecting groove 703. The telescopic cylinder 701 is fixedly connected to the top of the workbench 1, and the telescopic cylinder 701 is located between the two rotating seats 501. A guide column 16 is rotatably connected between the two connecting teeth 10. The surface of the guide column 16 is rotatably sleeved with a connecting sleeve 17. The bottom end of the connecting sleeve 17 is fixedly connected to the output end of the telescopic cylinder 701. The compression capsule 702 is arranged inside the rotating seat 501. The connector 9 is in the The surface inside the rotating seat 501 is fixedly connected to the top of the compression bag 702. One side of the compression bag 702 is connected to a conduit 18. The other end of the conduit 18 passes through the outside of the rotating seat 501 and is connected to the connecting groove 703. The connecting groove 703 is opened inside the flip plate 502. Three slide grooves 19 are evenly opened inside the flip plate 502. The three slide grooves 19 are distributed in a circular manner, and the connecting groove 703 is connected to the three slide grooves 19. The surface of the fixed plate 603 and one side close to the connecting column 602 are evenly fixedly connected with three connecting feet 20. The connecting feet 20 are slidably connected to the slide grooves 19.

[0038] Among them, the guide column 16 is driven to descend by the telescopic cylinder 701, thereby driving the two connecting heads 9 and the two flip plates 502 rotated to the horizontal state to press down together, and the compression bag 702 is squeezed by the connecting head 9, forcing the internal air of the compression bag 702 to be injected into the connecting groove 703 through the conduit 18, and finally injected into the slide groove 19, and the connecting foot 20 is pushed along the slide groove 19 by air pressure, thereby forcing the fixed plate 603 to slide toward the side away from the flip plate 502, forcing the cover plate and the blade to have a close fit effect, preventing small gaps between the blade and the cover plate during the welding process, and further ensuring the stability of the welding effect.

[0039] The feeding mechanism 8, the two feeding mechanisms 8 are symmetrically connected to one side of the workbench 1, and the feeding mechanism 8 is located on the side close to the chassis 3. The feeding mechanism 8 includes a hydraulic cylinder 801, a connecting disk 802 and a fixed head 803. The hydraulic cylinder 801 is rotatably connected to one side of the workbench 1, and the connecting disk 802 is fixedly connected to the output end of the hydraulic cylinder 801. The side of the connecting disk 802 close to the chassis 3 is fixedly connected to the fixed head 803. The interior of the fixed head 803 is evenly slidably connected with three top blocks 21, and the top blocks 21 and the fixed head 803 are penetrated. An airbag 22 is arranged inside the fixed head 803, and the three top blocks 21 are fixedly connected to the surface of the airbag 22. The side of the connecting disk 802 away from the fixed head 803 is fixedly connected to a small air pump 23, and the output end of the small air pump 23 is connected to the airbag 22.

[0040] Among them, air is injected into the airbag 22 through a small air pump 23, forcing the airbag 22 to expand, thereby forcing the three top blocks 21 to slide toward the outside of the fixed head 803, thereby fixing the other cover plate required for the impeller, and when the flip plate 502 drives the other cover plate that has been welded and fixed to the blade to move to the top of the chassis 3, the hydraulic cylinder 801 drives the connecting plate 802 to rotate and move up and down, forcing the cover plate on the surface of the fixed head 803 to fit with the other side of the blade, and positioning welding is performed through the positioning groove 26 to ensure the stability of the cover plate docking, reduce the error effect, and ensure the working effect of the centrifugal pump.

[0041] The specific working principle and method of use of the present invention are explained in detail below: When in use, the first step is to place the blades to be welded into a plurality of material troughs 24 in sequence, and then a cover plate is driven to move above the positioning plate 2 by the flip plate 502 and the fixed plate 603. After the cover plate is forced to contact the top of the blade, the control arm 27 drives the laser welding machine 4 to move above the flip plate 502, and the cover plate and the blade are positioned by laser welding through the positioning groove 26;

[0042] In the second step, the guide column 16 is driven downward by the telescopic cylinder 701, thereby driving the two connecting heads 9 and the two flip plates 502 rotated to the horizontal state to press down together. The compression bag 702 is squeezed by the connecting head 9, forcing the internal air of the compression bag 702 to be injected into the connecting groove 703 through the conduit 18 and finally injected into the slide groove 19. The air pressure pushes the connecting foot 20 to slide along the slide groove 19, thereby forcing the fixed plate 603 to slide toward the side away from the flip plate 502, forcing the cover plate and the blade to form a tight fit effect, preventing small gaps between the blade and the cover plate during the welding process, and further ensuring the stability of the welding effect;

[0043] The third step is to inject air into the airbag 22 through the small air pump 23 to force the airbag 22 to expand, thereby forcing the three top blocks 21 to slide toward the outside of the fixed head 803, so as to fix the other cover plate required for the impeller, and when the flip plate 502 drives the other cover plate that has been welded and fixed to the blade to move to the top of the chassis 3, the hydraulic cylinder 801 drives the connecting plate 802 to rotate and move up and down, forcing the cover plate on the surface of the fixed head 803 to fit with the other side of the blade, and positioning welding is performed through the positioning groove 26 to ensure the stability of the cover plate docking and reduce the error effect.

[0044] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic welding device for producing centrifugal pump impellers, characterized in that: The machine comprises a workbench, two positioning plates are symmetrically fixedly connected to one side of the top of the workbench, two chassis are symmetrically fixedly connected to the other side of the top of the workbench, four laser welding machines are symmetrically arranged on both sides of the workbench surface, two of which are symmetrically arranged on both sides of the positioning plates, and the other two laser welding machines are symmetrically arranged on both sides of the chassis, and further comprises: The two turning mechanisms are symmetrically connected to the middle of the workbench. One turning mechanism is located between one positioning plate and the chassis, and the other turning mechanism is located between the other positioning plate and the chassis. The turning mechanisms are used to drive the impeller to turn; Tensioning mechanism, the two tensioning mechanisms are respectively slidably connected to the surfaces of the two flipping mechanisms, and the tensioning mechanisms are used to fix the cover plate of the impeller; A pressurizing mechanism is provided inside the turning mechanism, and the turning mechanism is used to assist the close fit between the impeller components; and a loading mechanism, wherein the two loading mechanisms are symmetrically connected to one side of the workbench and are located on the side close to the chassis; The flip mechanism includes a rotating seat, a flip plate and a bevel gear. The two rotating seats are symmetrically fixedly connected to the middle part of the top of the workbench. The top of the rotating seat is slidably connected to a connecting head. The bottom of the connecting head is slidably connected to the inside of the rotating seat. The two flip plates are rotatably connected to the two connecting heads respectively. The surfaces of the opposite sides of the two flip plates are fixedly connected to connecting teeth. The bevel gear is rotatably connected to the top of the middle of the two connecting teeth, and the bevel gear is engaged with the two connecting teeth. The top of the rotating gear is fixedly connected to a motor. The motor is arranged between the two flip plates. A bracket is fixedly sleeved on the surface of the motor. The bottom end of the bracket is fixedly connected to the top of the workbench. The tensioning mechanism includes a cylinder, a connecting column and a fixed plate, the two cylinders are respectively fixedly connected to one side of the surface of the two flip plates, one side of the surface of the fixed plate is fixedly connected to the connecting column, the connecting column and the flip plate are arranged through, and the connecting column and the flip plate are slidably connected, an expansion bag is arranged inside the connecting column, and three tensioning blocks are evenly fixedly connected to the surface of the expansion bag, the tensioning block is slidably connected to the fixed plate, and the tensioning block and the fixed plate are arranged through, the output end of the cylinder is connected with an air pipe, the other end of the air pipe is arranged through an end of the connecting column away from the tensioning block, and the end of the air pipe that passes through the interior of the connecting column is connected with one end of the expansion bag; The pressurizing mechanism includes a telescopic cylinder, a compression bag and a connecting groove. The telescopic cylinder is fixedly connected to the top of the workbench, and the telescopic cylinder is located between the two rotating seats. A guide column is rotatably connected between the two connecting teeth, and the surface of the guide column is rotatably sleeved with a connecting sleeve. The bottom end of the connecting sleeve is fixedly connected to the output end of the telescopic cylinder. The compression bag is arranged inside the rotating seat. The surface of the connecting head is located inside the rotating seat and is fixedly connected to the top of the compression bag. One side of the compression bag is connected to a conduit, and the other end of the conduit passes through the outside of the rotating seat and is connected to the connecting groove. The connecting groove is opened inside the flip plate, and three sliding grooves are evenly opened inside the flip plate. The three sliding grooves are distributed in a circular manner, and the connecting groove is connected to the three sliding grooves. Three connecting feet are evenly fixedly connected to the surface of the fixed disk and close to the side of the connecting column, and the connecting feet are slidably connected to the sliding groove.

2. The automatic welding device for producing centrifugal pump impellers according to claim 1, characterized in that: The feeding mechanism includes a hydraulic cylinder, a connecting disk and a fixed head. The hydraulic cylinder is rotatably connected to one side of the workbench, the connecting disk is fixedly connected to the output end of the hydraulic cylinder, the side of the connecting disk close to the chassis is fixedly connected to the fixed head, the interior of the fixed head is evenly slidably connected with three top blocks, and the top blocks and the fixed head are arranged through, an air bag is provided inside the fixed head, the three top blocks are all fixedly connected to the surface of the air bag, a small air pump is fixedly connected to the side of the connecting disk away from the fixed head, and the output end of the small air pump is connected to the air bag.

3. The automatic welding device for producing centrifugal pump impellers according to claim 2, characterized in that: A plurality of material grooves are evenly formed on the surface of the positioning plate, and the material grooves are used to place blades required by the impeller. A groove is formed on the surface of the bottom plate, and the groove is slidably connected with the cylinder.

4. The automatic welding device for producing centrifugal pump impellers according to claim 3, characterized in that: The surfaces of the flip plate, the fixing plate and the connecting plate are all provided with a plurality of positioning grooves, and the positioning grooves are arranged corresponding to the positions of the material troughs.

5. The automatic welding device for producing centrifugal pump impellers according to claim 1, characterized in that: Four control arms are symmetrically fixedly connected to both sides of the workbench surface, and the four laser welding machines are respectively slidably connected to the workbench through the four control arms.

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