Intelligent welding system and method for multi-stage centrifugal pump impeller machining

Abstract

The present application belongs to the technical field of centrifugal pump production, and particularly relates to an intelligent welding system and method for processing a multi-stage centrifugal pump impeller. The present application is directed to a combined impeller composed of a lower cover plate, an upper cover plate, a blade component, an upper pressing plate component, a lower pressing plate component, and a lock nut. A positioning turntable assembly is used to provide positioning for the lower pressing plate component and the lower cover plate and drive their rotation. A blade feeding assembly is used to install the blade components one by one on the lower cover plate. A feeding manipulator is used to install the upper cover plate above the blade components. The rotation direction of the blades in the blade components is adjustable. After adjustment, the position of the blade components is locked by the upper pressing plate component. A screwing machine is used to install the lock nut on the outside of the screw rod protruding from the lower pressing plate component. Finally, an inner seam welding assembly / outer seam welding assembly is used to weld the welding inner seam / welding outer seam at the butt joint of the lower and upper cover plates, thereby meeting the rapid assembly requirements of the combined impeller and achieving high welding efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of centrifugal pump production, and particularly relates to an intelligent welding system and method for multistage centrifugal pump impeller machining. BACKGROUND

[0002] The multistage centrifugal pump realizes multiple pressurization of liquid through series connection of multiple impellers. Each impeller is installed on a pump shaft, and rotates at high speed when the pump shaft is driven to rotate by a motor. Liquid is driven to rotate together with the impeller at the center of the impeller, and is thrown out from the center of the impeller to the edge of the impeller under the action of centrifugal force, so that the liquid obtains kinetic energy and pressure energy. The flow rate and pressure of the liquid are improved in this process. At the same time, a low-pressure area is formed at the center of the impeller, and external liquid continuously flows to the center of the impeller under the action of atmospheric pressure or other pressure sources, forming continuous liquid flow.

[0003] Most of the conventional impellers for multistage centrifugal pumps are of an integral structure, which has the problems of unadjustable blade rotation direction, high casting difficulty and high preparation cost. Therefore, the applicant designs a combined impeller for a multistage centrifugal pump, which can adjust the rotation direction of the blades according to requirements, and can reduce the casting difficulty and preparation cost. In the prior art, there is a lack of an intelligent welding system that can meet the assembly requirements of the above-mentioned combined impeller, and the welding efficiency is low, which affects the production efficiency of the impeller. SUMMARY

[0004] The application aims to overcome at least one of the above problems in the prior art, and provides an intelligent welding system and method for multistage centrifugal pump impeller machining.

[0005] To achieve the above technical purposes and effects, the application is implemented by the following technical scheme:

[0006] The application provides an intelligent welding system for multistage centrifugal pump impeller machining, which comprises a cabinet, a positioning turntable assembly, a blade feeding assembly, an inner seam welding assembly, an outer seam welding assembly, a feeding manipulator, a screwing machine and a controller. The positioning turntable assembly is installed on the upper side of the cabinet. The feeding manipulator, the blade feeding assembly and the outer seam welding assembly are installed at the periphery of the positioning turntable assembly. The inner seam welding assembly is installed above the positioning turntable assembly. The screwing machine is installed in the cabinet. The controller is connected with the positioning turntable assembly, the blade feeding assembly, the inner seam welding assembly, the outer seam welding assembly, the feeding manipulator and the screwing machine.

[0007] Further, in the intelligent welding system for multi-stage centrifugal pump impeller processing, the combined impeller is composed of a lower cover plate, an upper cover plate, a blade component and a detachable fastening assembly, a ring of blade components is clamped and installed between the lower cover plate and the upper cover plate, and the position of the blade component is locked by the detachable fastening assembly.

[0008] Further, in the intelligent welding system for multi-stage centrifugal pump impeller processing, the lower cover plate comprises a lower cover plate body, a central shaft hole is formed at the center of the lower cover plate body, a first convex tube is arranged at the periphery of the central shaft hole, and an annular clamping groove is formed in the upper end surface of the first convex tube.

[0009] The upper cover plate comprises an upper cover plate body, a water inlet hole is formed at the center of the upper cover plate body, the diameter of the water inlet hole is larger than the diameter of the central shaft hole, a second convex tube is arranged at the periphery of the water inlet hole of the upper cover plate body, and a convex ring is arranged on the lower end surface of the second convex tube to cooperate with the annular clamping groove.

[0010] The inner edge line at the joint of the first convex tube and the second convex tube serves as a welding inner seam, and the outer edge line serves as a welding outer seam.

[0011] Further, in the intelligent welding system for multi-stage centrifugal pump impeller processing, the blade component is composed of a positioning rod part, a first protruding block part, a second protruding block part and a blade part, the blade part is fixed to the middle section of the positioning rod part, the second protruding block part is symmetrically fixed to the two sides of the blade part, the first protruding block part is fixed to the outer side of the second protruding block part, and an octagonal groove is formed in the positioning rod part.

[0012] Further, in the intelligent welding system for multi-stage centrifugal pump impeller processing, the detachable fastening assembly is composed of an upper pressing plate component, a lower pressing plate component and a lock nut.

[0013] The upper pressing plate component comprises an upper annular pressing plate matched with the second annular positioning groove, the lower side of the upper annular pressing plate is provided with a plurality of first positioning circular holes matched with the positioning rod part, the top wall of the first positioning circular hole is fixed with an octagonal column matched with the octagonal groove, and the bottom end of the octagonal column is provided with a screw rod matched with the lock nut.

[0014] The lower pressing plate component comprises a lower annular pressing plate matched with the first annular positioning groove, a plurality of through holes for the screw rod to pass through are arranged on the lower annular pressing plate, and a second positioning circular hole matched with the positioning rod part is arranged on the upper side of the lower annular pressing plate at the periphery of each through hole.

[0015] Further, in the intelligent welding system for multi-stage centrifugal pump impeller machining, the positioning turntable assembly comprises a rotary driver and a turntable, the fixed ring part of the rotary driver is fixed on the upper end of the cabinet, the movable ring part of the rotary driver is fixed and supported with the turntable, the turntable is provided with an annular pressing plate groove matched with the lower pressing plate component, a plurality of operation grooves for screw nut tightening are arranged on the bottom surface of the annular pressing plate groove in the circumferential direction, and a vacuum chuck is embedded and installed at the periphery of the annular pressing plate groove of the turntable.

[0016] Further, in the intelligent welding system for multi-stage centrifugal pump impeller machining, the blade feeding assembly comprises a side base plate, a first horizontal push rod, a support frame, a lead screw motor, a lead screw, a movable plate, a storage box, a material blocking push rod, a servo motor and a baffle, the cylinder body of the first horizontal push rod is fixed on the side base plate, the movable end of the first horizontal push rod is fixed with the support frame, the movable plate is slidably limited in the support frame, the movable plate is sleeved on the outside of the lead screw, the lead screw is rotated by the lead screw motor, the outer end of the movable plate is fixed with the storage box for single-layer stacking and storage of the blade component, the bottom of the storage box is provided with the material blocking push rod for blocking the material above the lowermost layer, the outside of the storage box is provided with the servo motor, and the output end of the servo motor is provided with the baffle capable of blocking the material of the lowermost layer.

[0017] Further, in the intelligent welding system for multi-stage centrifugal pump impeller machining, the inner seam welding assembly comprises a vertical guide rail pair, a groove-shaped frame, a vertical push rod, a hexagonal shaft, an inner seam welding head, a turnover motor, a driving gear and a driven gear sleeve, the web of the groove-shaped frame is fixed on the outside of the sliding block of the vertical guide rail pair, the vertical push rod is fixed on the inner wall of the upper side plate of the groove-shaped frame, the movable end of the vertical push rod is connected with the top end of the hexagonal shaft through a rotary joint, the bottom end of the hexagonal shaft is provided with the inner seam welding head, the turnover motor is fixed on the inner wall of the web of the groove-shaped frame, the output end of the turnover motor is provided with the driving gear engaged with the driven gear sleeve, the driven gear sleeve is movably supported by the lower side plate of the groove-shaped frame, and the hexagonal slot for the hexagonal shaft to pass through is arranged in the driven gear sleeve.

[0018] Further, the intelligent welding system for multi-stage centrifugal pump impeller machining has the outer seam welding assembly, the horizontal guide rail pair, the push plate, the second horizontal push rod and the outer seam welding head.

[0019] The application further provides an intelligent welding method for multi-stage centrifugal pump impeller machining, which is realized based on the intelligent welding system and includes the following steps.

[0020] S1, the lower cover plate is placed on the lower pressing plate component by the feeding manipulator, and the position of the lower cover plate is locked by the vacuum chuck.

[0021] S2, the blade component is conveyed to the lower cover plate by the blade feeding assembly, and the positioning rod part of the blade component is clamped into the first positioning rod hole; after each conveying, the lower cover plate is rotated by the positioning turntable assembly, and the rotation angle is equal to the central angle between two adjacent first positioning rod holes; until the conveying of all blade components is completed.

[0022] S3, the upper cover plate is installed on the blade component by the feeding manipulator, so that the second positioning rod hole of the upper cover plate is sleeved outside the positioning rod part of the blade component; the upper pressing plate component is installed outside the upper cover plate by the feeding manipulator, so that the upper annular pressing plate of the upper pressing plate component is clamped into the second annular positioning groove, the octagonal column of the upper pressing plate component is inserted into the octagonal groove of the blade component, and the screw rod of the upper pressing plate component is penetrated out of the lower cover plate; the locking nut is installed on the screw rod by the screwing machine.

[0023] S4, the inner seam is welded by the inner seam welding assembly, and the outer seam is welded by the outer seam welding assembly.

[0024] The application has the following beneficial effects:

[0025] 1. The application provides an intelligent welding system for multi-stage centrifugal pump impeller processing, which is mainly composed of a cabinet, a positioning turntable assembly, a blade feeding assembly, an inner seam welding assembly, an outer seam welding assembly, a feeding manipulator, a screwing machine and a controller. For the combined impeller composed of a lower cover plate, an upper cover plate, a blade component, an upper pressing plate component, a lower pressing plate component and a lock nut, the positioning turntable assembly is used to provide positioning for the lower pressing plate component and the lower cover plate of the combined impeller and drive them to rotate at a certain angle in the circumferential direction, the blade feeding assembly is used to install the blade components one by one on the lower cover plate, the feeding manipulator is used to install the upper cover plate above the blade component, the rotation direction of the blade part in the blade component can be adjusted according to requirements, and after adjustment, the position is locked by the upper pressing plate component, the lock nut is installed outside the screw rod of the lower pressing plate component in the upper pressing plate component by the screwing machine, and finally the inner seam / outer seam welding between the lower cover plate and the upper cover plate is welded by the inner seam welding assembly / outer seam welding assembly. In this way, the rapid assembly requirement of the combined impeller can be met, and the welding efficiency is high.

[0026] 2. The material of each component of the combined impeller prepared by the application can be selected according to the function, which is beneficial to reduce the overall preparation cost and greatly reduce the casting difficulty. In addition, only the detachable fastening assembly composed of the upper pressing plate component, the lower pressing plate component and the lock nut needs to be disassembled, and the rotation direction of the blade component can be adjusted according to requirements, which better meets the working condition requirement.

[0027] Of course, any product implementing the present application does not necessarily need to achieve all the advantages above. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a structure schematic view of the intelligent welding system of the present application.

[0030] Figure 2 It is a structure block diagram of the intelligent welding system of the present application.

[0031] Figure 3 It is a structure schematic view of the combined impeller in the present application.

[0032] Figure 4 It is a semi-partial schematic view of the combined impeller in the present application.

[0033] Figure 5 It is a structure exploded view of the combined impeller in the present application.

[0034] Figure 6 Structure diagram of one angle of the lower cover plate in the present application;

[0035] Figure 7 Structure diagram of another angle of the lower cover plate in the present application;

[0036] Figure 8 Structure diagram of one angle of the upper cover plate in the present application;

[0037] Figure 9 Structure diagram of another angle of the upper cover plate in the present application;

[0038] Figure 10 Structure diagram of the blade component in the present application;

[0039] Figure 11 Top view and sectional view of the blade component in the present application;

[0040] Figure 12 Structure diagram of one angle of the upper pressing plate component in the present application;

[0041] Figure 13 Structure diagram of another angle of the upper pressing plate component in the present application;

[0042] Figure 14 Structure diagram of the lower pressing plate component in the present application;

[0043] Figure 15 Structure diagram of the positioning turntable assembly in the present application;

[0044] Figure 16 Structure diagram of the blade feeding assembly in the present application;

[0045] Figure 17 Structure diagram of the inner seam welding assembly in the present application;

[0046] Figure 18 Structure diagram of the outer seam welding assembly in the present application;

[0047] In the drawings, the components represented by each reference numeral are as follows:

[0048] 1 - cabinet;

[0049] 2 - positioning turntable assembly, 201 - rotary driver, 202 - turntable, 203 - annular pressing plate groove, 204 - operation groove, 205 - vacuum chuck;

[0050] 3-leaf loading assembly, 301-side base plate, 302-first horizontal push rod, 303-support frame, 304-screw motor, 305-screw rod, 306-moving plate, 307-storage box, 308-servo motor, 309-baffle, 310-material blocking push rod;

[0051] 4-inner seam welding assembly, 401-vertical guide rail pair, 402-groove frame, 403-vertical push rod, 404-hexagonal shaft, 405-inner seam welding head, 406-reversing motor, 407-driving gear, 408-driven gear sleeve;

[0052] 5-outer seam welding assembly, 501-horizontal guide rail pair, 502-push plate, 503-second horizontal push rod, 504-outer seam welding head;

[0053] 6-feeding manipulator;

[0054] 7-screw tightening machine;

[0055] 8-controller;

[0056] 9-combined impeller, 91-lower cover plate, 911-lower cover plate body, 912-center shaft hole, 913-first convex pipe, 914-annular clamping groove, 915-first positioning rod hole, 916-first inner positioning groove, 917-first outer positioning groove, 918-first annular positioning groove, 92-upper cover plate, 921-upper cover plate body, 922-water inlet hole, 923-second convex pipe, 924-second annular positioning groove, 925-second positioning rod hole, 926-water guide hole, 927-convex ring, 928-second inner positioning groove, 929-second outer positioning groove, 93-vane component, 931-positioning rod part, 932-first convex block part, 933-second convex block part, 934-vane part, 935-octagonal groove, 94-upper pressing plate component, 941-upper annular pressing plate, 942-first positioning circular hole, 943-octagonal column, 944-screw rod, 95-lower pressing plate component, 951-lower annular pressing plate, 952-perforated hole, 953-second positioning circular hole, 96-lock nut. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0058] As Figures 1-2As shown, the embodiment provides an intelligent welding system for multi-stage centrifugal pump impeller processing, which comprises a cabinet 1, a positioning turntable assembly 2, a blade feeding assembly 3, an inner seam welding assembly 4, an outer seam welding assembly 5, a feeding manipulator 6, a screwing machine 7 and a controller 8. The positioning turntable assembly 2 is installed on the upper side of the cabinet 1, and the feeding manipulator 6, the blade feeding assembly 3 and the outer seam welding assembly 5 are installed on the periphery of the positioning turntable assembly 2. The inner seam welding assembly 4 is installed above the positioning turntable assembly 2, the screwing machine 7 is installed inside the cabinet 1, and the controller 8 is connected with the positioning turntable assembly 2, the blade feeding assembly 3, the inner seam welding assembly 4, the outer seam welding assembly 5, the feeding manipulator 6 and the screwing machine 7 respectively.

[0059] As shown, Figures 3-5 The combined impeller 9 is composed of a lower cover plate 91, an upper cover plate 92, a blade component 93 and a detachable fastening assembly. The blade component 93 is clamped and installed between the lower cover plate 91 and the upper cover plate 92, and the position of the blade component 93 is locked by the detachable fastening assembly.

[0060] As shown, Figures 6-7 The lower cover plate 91 comprises a lower cover plate body 911, a central shaft hole 912 is formed in the center of the lower cover plate body 911, a first convex tube 913 is arranged on the periphery of the central shaft hole 912, and an annular clamping groove 914 is formed in the upper end face of the first convex tube 913. A plurality of first positioning rod holes 915 are uniformly formed around the first convex tube 913, a first inner positioning groove 916 and a first outer positioning groove 917 are sequentially formed on the upper side of the lower cover plate body 911 on the periphery of the first positioning rod holes 915, and a first annular positioning groove 918 is formed on the lower side of the lower cover plate body 911 and communicates with each first positioning rod hole 915.

[0061] As shown, Figures 8-9 The upper cover plate 92 comprises an upper cover plate body 921, and a water inlet hole 922 is formed in the center of the upper cover plate body 921. The diameter of the water inlet hole 922 is greater than the diameter of the central shaft hole 912. A second convex tube 923 is arranged around the edge of the water inlet hole 922, and a convex ring 927 is arranged on the lower end face of the second convex tube 923 and matched with the annular clamping groove 914. A plurality of second positioning rod holes 925 and a second annular positioning groove 924 communicating with each second positioning rod hole 925 are uniformly formed around the second convex tube 923. A plurality of water guide holes 926 are formed in the circumferential direction of the tube part below the second convex tube 923, and a second inner positioning groove 928 and a second outer positioning groove 929 are sequentially formed on the lower side of the upper cover plate body 921 on the periphery of each second positioning rod hole 925.

[0062] In this embodiment, the inner edge line at the joint of the first convex tube 913 and the second convex tube 923 serves as the inner weld seam, and the outer edge line serves as the outer weld seam.

[0063] like Figures 10-11 As shown, the blade component 93 is composed of a positioning rod portion 931, a first protrusion portion 932, a second protrusion portion 933, and a blade portion 934. The blade portion 934 is fixed in the middle section of the positioning rod portion 931. The second protrusion portion 933 is symmetrically fixed on both sides of the blade portion 934. The first protrusion portion 932 is fixed on the outside of the second protrusion portion 933. An octagonal groove 935 is formed through the positioning rod portion 931. The positioning rod portion 931 cooperates with the first positioning rod hole 915 or the second positioning rod hole 925. The first protrusion portion 932 cooperates with the first inner positioning groove 916 or the second inner positioning groove 928 on its side. The second protrusion portion 933 cooperates with the first outer positioning groove 917 or the second outer positioning groove 929 on its side.

[0064] like Figure 5 , Figures 12-14 As shown, the detachable fastening assembly consists of an upper pressure plate component 94, a lower pressure plate component 95, and an anti-loosening nut 96.

[0065] In this embodiment, the upper pressure plate component 94 includes an upper annular pressure plate 941 that cooperates with the second annular positioning groove 924. The lower side of the upper annular pressure plate 941 is provided with a plurality of first positioning round holes 942 that cooperate with the positioning rod portion 931. The top wall of the first positioning round hole 942 is fixed with an octagonal post 943 that cooperates with the octagonal groove 935. The bottom end of the octagonal post 943 is provided with a screw 944 that cooperates with the anti-loosening nut 96.

[0066] In this embodiment, the lower pressure plate component 95 includes a lower annular pressure plate 951 that cooperates with the first annular positioning groove 918. The lower annular pressure plate 951 has a plurality of through holes 952 that facilitate the screw 944 to pass through. The upper side of the lower annular pressure plate 951 has a second positioning circular hole 953 that cooperates with the positioning rod portion 931 at the periphery of each through hole 952.

[0067] like Figure 15 As shown, the positioning turntable assembly 2 includes a rotary driver 201 and a turntable 202. The fixed ring of the rotary driver 201 is fixed to the upper end of the cabinet 1, and the rotating ring of the rotary driver 201 is fixedly supported by the turntable 202. The turntable 202 has an annular pressure plate groove 203 that mates with the lower pressure plate component 95. The bottom surface of the turntable 202 located in the annular pressure plate groove has several operating grooves 204 along the circumference to facilitate tightening nuts. A vacuum suction cup 205 is embedded and installed on the outer periphery of the turntable 202 located in the annular pressure plate groove 203.

[0068] The working principle of the positioning turntable assembly 2 is that the rotary driver 201 drives the turntable 202 to rotate at a fixed angle, the turntable 202 positions the lower pressing plate member 95 by using the annular pressing plate groove 203, and the vacuum chuck 205 adsorbs and locks the position of the lower cover plate 91 clamped on the outer side of the lower pressing plate member 95, so that the lower cover plate 91 can rotate synchronously with the turntable 202.

[0069] As shown in Figure 16 The blade loading assembly 3 includes a side base plate 301, a first horizontal push rod 302, a support frame 303, a lead screw motor 304, a lead screw 305, a movable plate 306, a storage box 307, a material blocking push rod 310, a servo motor 308, and a blocking plate 309. The cylinder body of the first horizontal push rod 302 is fixed on the side base plate 301, and the movable end of the first horizontal push rod 302 is fixed with the support frame 303. The support frame 303 is fixed with the lead screw motor 304, the movable plate 306 is slidingly limited in the support frame 303, the movable plate 306 is sleeved on the outer side of the lead screw 305, the lead screw 305 is driven to rotate by the lead screw motor 304, and the outer end of the movable plate 306 is fixed with the storage box 307 for single-layer stacking and storing blade members 93. The bottom of the storage box 307 is provided with the material blocking push rod 310 for blocking the material above the lowermost layer (i.e. the second layer from the bottom), and the outer side of the storage box 307 is provided with the servo motor 308, and the output end of the servo motor 308 is provided with the blocking plate 309 capable of blocking the material of the lowermost layer.

[0070] The working principle of the blade loading assembly 3 is that the first horizontal push rod 302 is used to realize the horizontal displacement of the storage box 307, and the lead screw lifting system composed of the support frame 303, the lead screw motor 304, the lead screw 305, and the movable plate 306 is used to realize the vertical displacement of the storage box 307; when it is necessary to release the blade member 93, the movable rod of the material blocking push rod 310 is first extended to block the blade member 93 of the second layer from the bottom, and then the servo motor 308 drives the blocking plate 309 to move away from the discharge port, so that the blade member 93 of the lowermost layer can automatically fall down, and then the blocking plate 309 and the material blocking push rod 310 are reset in sequence, so that the gravity of the blade member 93 is used to realize automatic repositioning.

[0071] As shown in Figure 17As shown in the figure, the inner seam welding assembly 4 comprises a vertical guide rail pair 401, a channel frame 402, a vertical push rod 403, a hexagonal shaft 404, an inner seam welding head 405, a turnover motor 406, a driving gear 407 and a driven gear sleeve 408. The web of the channel frame 402 is fixed outside the slider of the vertical guide rail pair 401, the upper side plate inner wall of the channel frame 402 is fixed with the vertical push rod 403, the movable end of the vertical push rod 403 is connected with the top end of the hexagonal shaft 404 through a rotary joint, the bottom end of the hexagonal shaft 404 is installed with the inner seam welding head 405, the web inner wall of the channel frame 402 is fixed with the turnover motor 406, the output end of the turnover motor 406 is installed with the driving gear 407 which is engaged with the driven gear sleeve 408, the driven gear sleeve 408 is movably supported by the lower side plate of the channel frame 402, and the hexagonal shaft 404 passes through the hexagonal slot in the driven gear sleeve 408.

[0072] The working principle of the inner seam welding assembly 4 is that the vertical guide rail pair 401 drives the inner seam welding head 405 to preliminarily adjust the vertical position, the vertical push rod 403 drives the inner seam welding head 405 to accurately adjust the vertical position, the turnover system composed of the turnover motor 406, the driving gear 407 and the driven gear sleeve 408 drives the hexagonal shaft 404 to rotate, thereby driving the inner seam welding head 405 to rotate, and meeting the full seam welding requirement of the welded inner seam.

[0073] As shown in the figure, Figure 18 The outer seam welding assembly 5 comprises a horizontal guide rail pair 501, a push plate 502, a second horizontal push rod 503 and an outer seam welding head 504, the cylinder body of the second horizontal push rod 503 is fixed outside the slider of the horizontal guide rail pair 501 through the push plate 502, and the movable end of the second horizontal push rod 503 is installed with the outer seam welding head 504.

[0074] The working principle of the outer seam welding assembly 5 is that the horizontal guide rail pair 501 drives the outer seam welding head 504 to preliminarily adjust the horizontal position, the second horizontal push rod 503 drives the outer seam welding head 504 to enter the inside of the combined impeller 9, thereby being capable of spot welding the welded outer seam, and after completing one spot welding, the combined impeller 9 can be rotated by the positioning turntable assembly 2, the rotation angle is equal to the central angle between the adjacent two blade components 93, and all spot welding operations are completed.

[0075] The embodiment also provides an intelligent welding method for multi-stage centrifugal pump impeller machining, comprising the following steps:

[0076] S1, the lower cover plate 91 is placed on the lower pressing plate component 95 by using the feeding manipulator 6, so that the lower annular pressing plate 951 is clamped into the first annular positioning groove 918 of the lower cover plate 91, and the position of the lower cover plate 91 is adsorbed and locked by using the vacuum chuck 205;

[0077] S2, the blade component 93 is transported to the lower cover plate 91 by using the blade feeding assembly 3, and the positioning rod part 931 of the blade component 93 is clamped into the first positioning rod hole 915; after each transportation, the lower cover plate 91 is rotated by using the positioning turntable assembly 2, and the rotation angle is equal to the central angle between the adjacent two first positioning rod holes 915; until the transportation of all the blade components 93 is completed;

[0078] S3, the upper cover plate 92 is installed on the blade component 93 by using the feeding manipulator 6, so that the second positioning rod hole 925 of the upper cover plate 92 is sleeved outside the positioning rod part 931 of the blade component 93; the upper pressing plate component 94 is installed outside the upper cover plate 92 by using the feeding manipulator 6, so that the upper annular pressing plate 941 of the upper pressing plate component 94 is clamped into the second annular positioning groove 924 of the upper cover plate 92, the octagonal column 943 of the upper pressing plate component 94 is inserted into the octagonal groove 935 of the blade component 93, and the screw rod 944 of the upper pressing plate component 94 is penetrated out of the lower cover plate 91; the lock nut 96 is installed on the screw rod 944 by using the screwing machine 7;

[0079] S4, the welded inner seam is welded by using the inner seam welding assembly 4, and the welded outer seam is welded by using the outer seam welding assembly 5.

[0080] In this embodiment, the positioning turntable assembly 2 is used to provide positioning for the lower pressing plate component 95 and the lower cover plate 91 of the combined impeller 9 and drive them to rotate at a certain angle along the circumference, the blade component 93 is installed on the lower cover plate 91 one by one by using the blade feeding assembly 3, the upper cover plate 92 is installed above the blade component 93 by using the feeding manipulator 6, the rotation direction of the blade part 934 in the blade component 93 can be adjusted according to requirements, the position is locked by using the upper pressing plate component 94 after adjustment, the lock nut 96 is installed outside the screw rod 944 of the upper pressing plate component 94 which penetrates out of the lower pressing plate component 95 by using the screwing machine 7, and finally the welded inner seam / welded outer seam at the joint of the lower cover plate 91 and the upper cover plate 92 is welded by using the inner seam welding assembly 4 / outer seam welding assembly 5, so that the rapid assembly requirement of the combined impeller can be met, and the welding efficiency is high.

[0081] The material of each part of the combined impeller 9 prepared in the embodiment can be selected according to the function, which is beneficial to reduce the overall manufacturing cost and greatly reduce the casting difficulty. In addition, only the detachable fastening assembly composed of the upper pressing plate member 94, the lower pressing plate member 95 and the lock nut 96 needs to be disassembled, and the rotation direction of the blade member 93 can be adjusted according to the demand, which better meets the working condition demand.

[0082] The preferred embodiments disclosed above are only for helping to illustrate the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, many modifications and variations can be made according to the content of the present application. The embodiments are selected and described in detail in order to better explain the principles and practical applications of the present application, so that the persons skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. An intelligent welding system for multi-stage centrifugal pump impeller machining, characterized in that, The intelligent welding system comprises a cabinet, a positioning turntable assembly, a vane feeding assembly, an inner seam welding assembly, an outer seam welding assembly, a feeding manipulator, a screwing machine and a controller, the upper side of the cabinet is provided with the positioning turntable assembly, the periphery of the positioning turntable assembly is provided with the feeding manipulator, the vane feeding assembly and the outer seam welding assembly, the upper side of the positioning turntable assembly is provided with the inner seam welding assembly, the inside of the cabinet is provided with the screwing machine, and the controller is connected with the positioning turntable assembly, the vane feeding assembly, the inner seam welding assembly, the outer seam welding assembly, the feeding manipulator and the screwing machine respectively; The combined impeller is composed of a lower cover plate, an upper cover plate, a vane component and a detachable fastening assembly, a ring of vane components is clamped and installed between the lower cover plate and the upper cover plate, and the position of the vane component is locked by the detachable fastening assembly; The lower cover plate comprises a lower cover plate body, a central shaft hole is formed in the center of the lower cover plate body, a first convex tube is arranged at the periphery of the central shaft hole of the lower cover plate body, and an annular clamping groove is formed in the upper end surface of the first convex tube; a plurality of first positioning rod holes are uniformly formed around the first convex tube of the lower cover plate body, a first inner positioning groove and a first outer positioning groove are sequentially formed in the upper side of the lower cover plate body at the periphery of the first positioning rod holes, and a first annular positioning groove is formed in the lower side of the lower cover plate body and communicates with each first positioning rod hole; The upper cover plate comprises an upper cover plate body, a water inlet hole is formed in the center of the upper cover plate body, the diameter of the water inlet hole is larger than that of the central shaft hole, a second convex tube is arranged around the edge of the water inlet hole of the upper cover plate body, and a convex ring is arranged on the lower end surface of the second convex tube and matched with the annular clamping groove; a plurality of second positioning rod holes and a second annular positioning groove communicating with each second positioning rod hole are uniformly formed around the second convex tube of the upper cover plate body, a plurality of water guide holes are formed in the tube part below the second convex tube of the upper cover plate body in the circumferential direction, and a second inner positioning groove and a second outer positioning groove are sequentially formed in the lower side of the upper cover plate body at the periphery of each second positioning rod hole; The inner edge line at the butt joint of the first convex tube and the second convex tube is used as a welding inner seam, and the outer edge line is used as a welding outer seam; The vane component is composed of a positioning rod part, a first protruding block part, a second protruding block part and a vane part, the vane part is fixed to the middle section of the positioning rod part, the second protruding block part is symmetrically fixed to the two sides of the vane part, the first protruding block part is fixed to the outer side of the second protruding block part, and an octagonal groove is formed in the positioning rod part; the positioning rod part is matched with the first positioning rod hole or the second positioning rod hole, the first protruding block part is matched with the first inner positioning groove or the second inner positioning groove on the same side, and the second protruding block part is matched with the first outer positioning groove or the second outer positioning groove on the same side; The welding method of the intelligent welding system comprises the following steps: S1, placing the lower pressing plate component in the annular pressing plate groove of the turntable of the positioning turntable assembly by using the feeding manipulator, placing the lower cover plate on the lower pressing plate component by using the feeding manipulator, and locking the position of the lower cover plate by using the vacuum suction cup; S2, the blade component is transported to the lower cover plate by the blade feeding assembly, and the positioning rod part of the blade component is clamped into the first positioning rod hole; after each transportation, the lower cover plate is rotated by the positioning turntable assembly, and the rotation angle is equal to the central angle between the two adjacent first positioning rod holes; until all the blade components are transported; S3, the upper cover plate is installed on the blade component by the feeding manipulator, so that the second positioning rod hole of the upper cover plate is sleeved outside the positioning rod part of the blade component; the upper pressing plate component is installed outside the upper cover plate by the feeding manipulator, so that the upper annular pressing plate of the upper pressing plate component is clamped into the second annular positioning groove, the octagonal column of the upper pressing plate component is inserted into the octagonal groove of the blade component, and the screw rod of the upper pressing plate component is penetrated out of the lower cover plate; the lock nut is installed on the screw rod by the screwing machine; S4, the welded inner seam is welded by the inner seam welding assembly, and the welded outer seam is welded by the outer seam welding assembly.

2. The intelligent welding system for multi-stage centrifugal pump impeller machining according to claim 1, characterized in that, The detachable fastening assembly is composed of an upper pressing plate component, a lower pressing plate component and a lock nut; The upper pressing plate component comprises an upper annular pressing plate matched with the second annular positioning groove, a plurality of first positioning circular holes matched with the positioning rod part are formed in the lower side of the upper annular pressing plate, an octagonal column matched with the octagonal groove is fixed on the top wall of the first positioning circular hole, and a screw rod matched with the lock nut is arranged at the bottom end of the octagonal column; The lower pressing plate component comprises a lower annular pressing plate matched with the first annular positioning groove, a plurality of perforations for the screw rod to pass through are formed in the lower annular pressing plate, and a second positioning circular hole matched with the positioning rod part is formed in the upper side of the lower annular pressing plate at the periphery of each perforation.

3. The intelligent welding system for multi-stage centrifugal pump impeller machining according to claim 2, characterized in that, The positioning turntable assembly comprises a rotary driver and a turntable, the fixed ring part of the rotary driver is fixed on the upper end of the cabinet, the movable ring part of the rotary driver is fixedly supported with the turntable, the annular pressing plate groove matched with the lower pressing plate component is formed in the turntable, a plurality of operation grooves for screw nut tightening are circumferentially formed in the bottom surface of the annular pressing plate groove of the turntable, and a vacuum suction cup is embedded and installed at the periphery of the annular pressing plate groove of the turntable.

4. The intelligent welding system for multi-stage centrifugal pump impeller machining according to claim 3, characterized in that, The blade feeding assembly comprises a side base plate, a first horizontal push rod, a support frame, a lead screw motor, a lead screw, a movable plate, a storage box, a material blocking push rod, a servo motor and a baffle, the cylinder body of the first horizontal push rod is fixed on the side base plate, the movable end of the first horizontal push rod is fixed with the support frame, the movable plate is slidably limited in the support frame, the movable plate is sleeved outside the lead screw, the lead screw is rotated by the lead screw motor, the outer end of the movable plate is fixed with the storage box for single-layer stacking and storage of blade components, the bottom of the storage box is provided with the material blocking push rod for blocking the upper material of the lowermost layer, the outer side of the storage box is provided with the servo motor, and the output end of the servo motor is provided with the baffle capable of blocking the lowermost layer.

5. The intelligent welding system for multi-stage centrifugal pump impeller machining according to claim 4, characterized in that, The inner seam welding assembly comprises a vertical guide rail pair, a channel frame, a vertical push rod, a hexagonal shaft, an inner seam welding head, a turnover motor, a driving gear and a driven gear sleeve, the web of the channel frame is fixed outside the sliding block of the vertical guide rail pair, the upper side plate inner wall of the channel frame is fixed with the vertical push rod, the movable end of the vertical push rod is connected with the top end of the hexagonal shaft through a rotary joint, the bottom end of the hexagonal shaft is installed with the inner seam welding head, the web inner wall of the channel frame is fixed with the turnover motor, the output end of the turnover motor is installed with the driving gear which is engaged with the driven gear sleeve, the driven gear sleeve is movably supported by the lower side plate of the channel frame, and a hexagonal slot is arranged in the driven gear sleeve to facilitate the hexagonal shaft to pass through.

6. The intelligent welding system for multi-stage centrifugal pump impeller machining according to claim 5, characterized in that, The outer seam welding assembly comprises a horizontal guide rail pair, a push plate, a second horizontal push rod and an outer seam welding head, the cylinder body of the second horizontal push rod is fixed outside the sliding block of the horizontal guide rail pair through the push plate, and the movable end of the second horizontal push rod is installed with the outer seam welding head.

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