A welding jig for an industrial fan impeller

Abstract

The present invention relates to the technical field of welding, and particularly relates to a welding fixture for an industrial fan impeller, which comprises a base and a working plate. The top of the base is fixedly connected with the working plate, and the working plate is a circular plate with a central opening. The welding fixture further comprises: a rotating ring rotatably installed on the outer edge of the top surface of the working plate, and a plurality of electric slide rails I are circumferentially and spacedly fixedly arranged on the top surface of the rotating ring; an inner ring plate rotatably assembled at the central opening of the rotating ring, and a plurality of electric slide rails II which are equal in number to the electric slide rails I are circumferentially and spacedly fixedly arranged on the top surface of the inner ring plate; and positioning and clamping members arranged on each of the electric slide rails I and the electric slide rails II. Through the mutual cooperation of the positioning and clamping members on the electric slide rails I and the electric slide rails II, the present invention can accurately position and clamp each blade, and perform fine adjustment through a cylinder and a bidirectional lead screw driven by a first motor, thereby effectively improving the accuracy of welding the blades on the chassis.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly relates to a welding jig for an industrial fan impeller. Background Art

[0002] With the development of industrial technology, the requirements for the performance of fans are getting higher and higher, which are not only reflected in the efficiency of the fans, but also include aspects such as their durability and operation stability. Traditional manual welding methods are difficult to meet the production requirements of high precision and high quality. Therefore, the development of special welding jigs has become a key step in improving production efficiency and product quality.

[0003] The prior art discloses a welding jig for a fan impeller (publication number CN211072427U), which includes a base. A placement plate is movably sleeved on the top of the base. A fixing rod is fixedly connected to the top of the placement plate. A central rod is movably sleeved on the top of the fixing rod. An umbrella-shaped wheel is fixedly connected to the bottom of the placement plate. This jig can simply fix and rotate the fan impeller for welding by pushing out the fixing plate to fix the fan impeller and then driving the placement plate to rotate with the umbrella-shaped wheel. However, there are still certain limitations in use. Since the preliminary splicing of the blades usually depends on manual spot welding positioning according to the auxiliary lines on the chassis, this jig itself lacks the preliminary splicing and positioning function, which is likely to cause deviations in the angles and positions of the blades during manual welding, thereby affecting the subsequent welding quality of the impeller. Moreover, it lacks a fine-tuning mechanism and is difficult to achieve fine position correction of the blades. Although the angle can be fixed by the adjusting wheel and the limiting block of the clamping frame, the accuracy of repeated positioning is low. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a welding jig for an industrial fan impeller with convenient operation and high welding precision.

[0005] The object of the present invention is achieved by the following technical solutions: A welding jig for an industrial fan impeller, comprising a base and a working plate, wherein the top of the base is fixedly connected with the working plate; further comprising: a rotating ring, rotatably installed on the outer edge of the top surface of the working plate, and a plurality of electric slide rails I are circumferentially and spacedly fixedly arranged on the top surface of the rotating ring; an inner ring plate, rotatably assembled at the central opening of the rotating ring, and a plurality of electric slide rails II with the same number as that of the electric slide rails I are also circumferentially and spacedly fixedly arranged on the top surface of the inner ring plate; positioning and clamping members, arranged on each of the electric slide rails I and electric slide rails II, and the positioning and clamping members include: a cylinder, installed on the electric slide rail I or electric slide rail II; a slide plate, fixedly installed on the piston rod of the cylinder, and a circular groove is opened on the top of the slide plate; a hinge shaft, fixedly connected to the top surface of the slide plate; clamping frames, having two and being vertically and staggeringly hinged to the hinge shaft; a guide shaft, arranged at one end of the clamping frame away from the clamping surface, and the guide shaft is in sliding fit with the circular groove of the slide plate; a first motor, fixedly installed on the slide plate; sliding blocks, having two and respectively slidably installed on the slide plate; hinge blocks, respectively hinged to the two guide shafts, and the clamping frame is movably connected to the corresponding sliding block through the hinge block; a bidirectional lead screw, fixedly arranged on the output shaft of the first motor, and the bidirectional threads of the bidirectional lead screw are respectively in threaded fit with the two sliding blocks.

[0006] Furthermore, there are at least 3 limiting members arranged on the working plate, and the limiting members are used for limiting the welding chassis on the working plate. The limiting members include clamping blocks, multi-stage push rods, screw rods, guide rods, connecting plates and rubber blocks. The clamping blocks are circumferentially and spacedly slidably arranged on the edge of the top surface of the working plate, and the multi-stage push rods for driving the clamping blocks are fixedly installed on the working plate. Two symmetrical through openings are opened on the clamping block. A screw rod is threadedly connected to one of the through openings of the clamping block, and a guide rod is slidably connected to the other through opening of the clamping block. The screw rod and the guide rod are connected by a connecting plate, and the screw rod and the connecting plate are in rotational fit. Rubber blocks are arranged at the rod ends of the screw rod and the guide rod located inside the clamping block.

[0007] Furthermore, a second motor is fixedly installed on the bottom surface of the working plate, a gear I is fixedly installed on the output shaft of the second motor, a gear ring I is fixedly connected to the bottom of the inner ring plate, and the teeth on the outer walls of the gear I and the gear ring I are meshed with each other.

[0008] Furthermore, a third motor is also fixedly installed on the bottom surface of the working plate. The output shaft of the third motor rotatably penetrates through the working plate and then is fixedly provided with a gear II. A gear ring II is fixedly arranged inside the rotating ring, and the teeth on the inner sides of the gear II and the gear ring II are meshed with each other.

[0009] Furthermore, a positioning assembly is provided on the outer side of the working plate. The positioning assembly is used to position the top plate welded to the top of the blade from the top. The positioning assembly includes an electric push rod, a mounting plate, and a limiting annular cover. Not less than three electric push rods are fixedly installed at circumferential intervals on the outer side surface of the working plate. An mounting plate is fixed on the push rod of the electric push rod, and a limiting annular cover is fixedly connected between the multiple mounting plates.

[0010] Furthermore, the central position of the limiting annular cover is a circular opening, and the top of the limiting annular cover smoothly transitions to the bottom to form a continuous curved surface.

[0011] Furthermore, an upwardly supported bracket is fixedly connected to the mounting plate. A rotating plate is rotatably installed on the upper part of the bracket. Industrial CCD cameras are assembled on the bottom surfaces at both ends of the rotating plate. The industrial CCD cameras are used to vertically monitor the accuracy of welding the blades on the bottom plate surface from the top. A fourth motor is fixedly installed at the top of the bracket, and the output shaft of the fourth motor is connected to the rotation central axis of the rotating plate.

[0012] Furthermore, a transparent plate is further included. A transparent plate is fixedly provided on the top surface of the limiting annular cover. The transparent plate is made of transparent tempered glass.

[0013] Beneficial effects:

[0014] 1. In the present invention, through the cooperation of the positioning and clamping members on the first electric slide rail and the second electric slide rail, each blade can be accurately positioned and clamped, and fine adjustment is performed through the cylinder and the bidirectional lead screw driven by the first motor, thereby effectively improving the accuracy of welding the blades on the bottom plate.

[0015] 2. In the present invention, the inner ring plate and the rotating ring can be driven to rotate by the second motor and the third motor, so that the positioning and clamping members can automatically adapt to the position adjustment requirements of the blades without manual adjustment.

[0016] 3. The industrial CCD cameras of the present invention can vertically monitor the accuracy of welding the blades on the bottom plate surface from the top, and the fourth motor can drive the rotating plate to rotate, enabling the CCD cameras to perform dynamic adjustment monitoring following the specific welding positions of the bottom plate, improving the quality of welding of the wind turbine impeller.

[0017] 4. The present invention can also press and limit the top plate to be welded to the top of the blade from the top through the positioning assembly composed of the electric push rod, the mounting plate, and the limiting annular cover, ensuring the accuracy and stability of welding the top plate to the top of the blade. Description of the drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2This is a connection diagram of the base, working plate, rotating ring and inner ring plate of the present invention.

[0020] Figure 3 This is a schematic diagram of the positioning and clamping member of the present invention for positioning and clamping the blade.

[0021] Figure 4 This is a connection diagram of components such as the inner ring plate, cylinder, sliding plate and clamping frame of the present invention.

[0022] Figure 5 This is a schematic diagram of the specific component cooperation relationship of the positioning and clamping member of the present invention.

[0023] Figure 6 This is a schematic diagram of the specific components of the limiting member of the present invention.

[0024] Figure 7 This is a cooperation diagram of the inner ring plate, second motor, gear one and toothed ring one of the present invention.

[0025] Figure 8 This is a connection diagram of the third motor, gear two and toothed ring two of the present invention.

[0026] Figure 9 This is a schematic diagram of the working plate, electric push rod, mounting plate and limiting annular cover of the present invention.

[0027] Figure 10 This is a schematic diagram of components such as the limiting annular cover, transparent plate and industrial CCD camera of the present invention.

[0028] In the figure: 100, chassis; 200, blade; 1, base; 2, working plate; 21, limiting member; 211, clamping block; 212, multi-stage push rod; 213, screw rod; 214, guide rod; 215, connecting plate; 216, rubber block; 3, rotating ring; 31, electric slide rail one; 4, inner ring plate; 41, electric slide rail two; 5, positioning and clamping member; 51, cylinder; 52, sliding plate; 521, circular groove; 53, hinge shaft; 54, clamping frame; 55, guide shaft; 6, first motor; 61, sliding block; 62, hinge block; 63, bidirectional lead screw; 7, second motor; 71, gear one; 72, toothed ring one; 8, third motor; 81, gear two; 82, toothed ring two; 9, positioning assembly; 91, electric push rod; 92, mounting plate; 93, limiting annular cover; 10, transparent plate; 11, bracket; 12, rotating plate; 13, industrial CCD camera; 14, fourth motor. Detailed implementation mode

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and in the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] Embodiment 1: A welding jig for an industrial fan impeller, as Figures 2 - 5As shown in the figure, it includes a base 1 and a working plate 2. The base 1 is the assembly carrier of this welding jig. The top of the base 1 is fixedly connected with the working plate 2, and the working plate 2 is a circular plate with a central opening. It also includes: a rotating ring 3, rotatably installed on the outer edge of the top surface of the working plate 2, and a plurality of electric slide rails 31 are circumferentially and spacedly fixedly arranged on the top surface of the rotating ring 3; an inner ring plate 4, rotatably assembled at the central opening of the rotating ring 3, and a plurality of electric slide rails 41 with the same number as the electric slide rails 31 are also circumferentially and spacedly fixedly arranged on the top surface of the inner ring plate 4; positioning clamping members 5 are arranged on each of the electric slide rails 31 and the electric slide rails 41. Through the cooperation of the positioning clamping members 5 on the electric slide rails 31 and the electric slide rails 41, a blade 200 can be positioned and clamped, and the welding operation of each blade 200 can be completed on the chassis 100 placed on the working plate 2. The positioning clamping member 5 includes: a cylinder 51, installed on the electric slide rail 31 or the electric slide rail 41; a sliding plate 52, fixedly installed on the piston rod of the cylinder 51, and a circular groove 521 is opened at the top of the sliding plate 52; a hinge shaft 53, fixedly connected to the top surface of the sliding plate 52; there are two clamping frames 54, which are vertically and staggeredly hinged to the hinge shaft 53. The two clamping frames 54 on the sliding plate 52 form a fixture for clamping one side of the blade 200, and the orientations of the clamping frames 54 on the electric slide rails 31 and the electric slide rails 41 are opposite; a guide shaft 55 is arranged at one end of the clamping frame 54 away from the clamping surface, and the guide shaft 55 is slidably matched with the circular groove 521 of the sliding plate 52; a first motor 6 is fixedly installed on the sliding plate 52; there are two sliding blocks 61, which are respectively slidably installed on the sliding plate 52; hinge blocks 62 are respectively hinged to the two guide shafts 55, and the clamping frame 54 is movably connected to the corresponding sliding block 61 through the hinge block 62; a bidirectional lead screw 63 is fixedly arranged on the output shaft of the first motor 6, and the two-way threads of the bidirectional lead screw 63 are respectively threadedly matched with the two sliding blocks 61. A guide track for sliding and limiting cooperation with the two sliding blocks 61 is opened on the sliding plate 52, and the extending direction of the guide track is the same as the extending direction of the bidirectional lead screw 63.

[0032] After the chassis 100 is stably placed on the working plate 2, the positioning clamping members 5 of the rotating ring 3 and the inner ring plate 4 are respectively rotated and adjusted. After initially limiting a plurality of blades 200 with reference to the welding lines on the chassis 100 by using the two positioning clamping members 5, the cylinder 51 can adjust the clamping position of the clamping frame 54. The first motor 6 drives the sliding blocks 61 to move towards each other through the bidirectional lead screw 63, so that the clamping frame 54 is driven by the sliding blocks 61 to rotate with the hinge shaft 53 as the rotation center, and fine adjustment and positioning of the blade 200 are carried out, improving the accuracy of welding the blade 200 on the chassis 100.

[0033] Such as Figure 2 、 Figure 3 and Figure 6As shown in the figure, there are three limit members 21 provided on the working plate 2. The limit members 21 are used to limit welding chassis 100 of different sizes on the working plate 2. The limit members 21 include clamping blocks 211, multi-stage push rods 212, screw rods 213, guide rods 214, connecting plates 215 and rubber blocks 216. The clamping blocks 211 are circumferentially and slidably arranged at intervals on the top surface edge of the working plate 2. The multi-stage push rods 212 for driving the clamping blocks 211 are fixedly installed on the working plate 2. Two symmetrical through holes are opened on the clamping blocks 211. A screw rod 213 is threadedly connected to one of the through holes of the clamping block 211, and a guide rod 214 is slidably connected to the other through hole of the clamping block 211. The screw rod 213 and the guide rod 214 are connected into a whole through the connecting plate 215. The screw rod 213 and the connecting plate 215 are rotationally matched. Rubber blocks 216 are provided at the rod ends of the screw rod 213 and the guide rod 214 located inside the clamping block 211. The corresponding clamping blocks 211 are initially limited on the chassis 100 by driving of the multi-stage push rods 212 at multiple places. By screwing the screw rod 213, the rubber blocks 216 inside the clamping block 211 are synchronously driven by the connecting plate 215 to extend out and further limit the chassis 100, so that the limit members 21 can dynamically adapt to the stable limiting of chassis 100 of different sizes.

[0034] As Figure 7 and Figure 8 shown in the figure, a second motor 7 is fixedly installed on the bottom surface of the working plate 2. A first gear 71 is fixedly installed on the output shaft of the second motor 7. A first toothed ring 72 is fixedly connected to the bottom of the inner ring plate 4. The teeth on the outer walls of the first gear 71 and the first toothed ring 72 mesh with each other. The second motor 7 drives the first toothed ring 72 to rotate through the first gear 71, so that the positioning and clamping members 5 on the inner ring plate 4 can adapt to the blade 200 and automatically perform position adjustment; a third motor 8 is also fixedly installed on the bottom surface of the working plate 2. The output shaft of the third motor 8 rotatably penetrates through the working plate 2 and is fixedly provided with a second gear 81. A second toothed ring 82 is fixedly provided on the inner side of the rotating ring 3. The teeth on the inner sides of the second gear 81 and the second toothed ring 82 mesh with each other. The third motor 8 drives the second toothed ring 82 to rotate through the second gear 81, so that the positioning and clamping members 5 on the rotating ring 3 can also adapt to the blade 200 and automatically perform position adjustment.

[0035] When using this welding fixture to weld the impeller of an industrial fan, first, activate the electric slide rail two 41 on the inner ring plate 4, so that the positioning and clamping member 5 on the inner ring plate 4 first retracts inward to avoid the position where the chassis 100 is placed. Then, place the chassis 100 to be welded on the top surface of the working plate 2. Start the multi-stage push rods 212 at multiple places on the working plate 2. The push rods of the multi-stage push rods 212 drive the clamping blocks 211 to slide along the edge of the working plate 2 to the outside of the chassis 100 and initially limit the position of the chassis 100. Subsequently, by rotating the screw rod 213, the screw rod 213 drives the connecting plate 215 through the thread, so that the rubber blocks 216 at the ends of the screw rod 213 and the guide rod 214 synchronously extend towards the chassis 100, and further fit and clamp the edge of the chassis 100 to ensure that the chassis 100 on the working plate 2 can be centered and fixed. After the positioning of the chassis 100 is completed, activate the electric slide rail one 31 on the rotating ring 3 and the electric slide rail two 41 on the inner ring plate 4. The electric slide rail one 31 and the electric slide rail two 41 will drive the corresponding positioning and clamping members 5 to move circumferentially along the working plate 2. The operator places the blades 200 between the corresponding clamping members at two places inside and outside the chassis 100. Start the cylinder 51 to push the slide plate 52 towards the edge of the clamped blade 200. After the clamping frame 54 on the slide plate 52 is adjusted to the appropriate clamping position at both ends of the blade 200, close the cylinder 51 and start the first motor 6 at the same time. The output shaft of the first motor 6 will drive the bidirectional lead screw 63 to rotate. The two reverse threads of the bidirectional lead screw 63 respectively drive the two sliding blocks 61 to move towards each other. The sliding blocks 61 are connected to the guide shaft 55 through the hinge blocks 62 and form a lever structure, pushing the upper and lower staggered clamping frames 54 to rotate around the hinge shaft 53. Since the circular groove 521 at the top of the slide plate 52 is slidably matched with the guide shaft 55, it ensures the smooth movement of the clamping frame 54, so as to accurately clamp the two side edges of the blade 200. During this process, the second motor 7 and the third motor 8 respectively drive the gear one 71 and the gear two 81 to rotate in cooperation. The gear one 71 and the gear two 81 respectively drive the gear ring one 72 of the inner ring plate 4 and the gear ring two 82 of the rotating ring 3 to rotate synchronously, so that the clamping members can move precisely circumferentially, ensuring that multiple blades 200 are evenly distributed along the chassis 100 and are precisely aligned with the welding line. Then, start manual welding. The welder holds an argon arc welding gun, and the welding wire on the argon arc welding gun extends into the joint between the chassis 100 and the blade 200, and spot welds the joint edge of the blade 200 along the trajectory of the preset welding line on the chassis 100, so that each blade 200 can be accurately welded to the chassis 100, completing the preliminary welding and fixing of the chassis 100 and multiple blades 200.

[0036] Embodiment 2: On the basis of Embodiment 1, as Figure 1 and Figure 9As shown in the figure, a positioning component 9 is provided on the outer side of the working plate 2. The positioning component 9 is used to position the top plate welded to the top of the blade 200 from the top. The positioning component 9 includes an electric push rod 91, a mounting plate 92 and a limiting annular cover 93. Three electric push rods 91 are fixedly installed at circumferential intervals on the outer side surface of the working plate 2. A mounting plate 92 is fixed on the push rod of the electric push rod 91. A limiting annular cover 93 is fixedly connected between multiple mounting plates 92. When welding the top plate on the top of the blade 200, multiple electric push rods 91 are synchronously activated, so that the electric push rod 91 drives the limiting annular cover 93 to lift and limit through the corresponding mounting plate 92, so that the top plate to be welded on the top of the blade 200 can be pressed and limited by the limiting annular cover 93 from the top, which is convenient for stable welding of the top plate of the blade 200; the central position of the limiting annular cover 93 is a circular opening, and the top of the limiting annular cover 93 smoothly transitions to the bottom to form a continuous curved surface. The limiting annular cover 93 is used for centering and limiting when welding the top plate of the blade 200, improving the accuracy of welding the top plate to the top of the blade 200.

[0037] As Figure 1 and Figure 10 shown in the figure, a bracket 11 that supports upward is fixedly connected to the mounting plate 92. A rotating plate 12 is rotatably installed on the upper part of the bracket 11. Industrial CCD cameras 13 are assembled on the bottom surfaces of both ends of the rotating plate 12. The industrial CCD cameras 13 are used to vertically monitor the accuracy of welding the blade 200 on the surface of the chassis 100 from the top. A fourth motor 14 is fixedly installed on the top of the bracket 11. The output shaft of the fourth motor 14 is connected to the rotation axis of the rotating plate 12. When the top plate is not welded on the blade 200, the fourth motor 14 automatically drives the industrial CCD cameras 13 on the rotating plate 12 to perform intermittent rotation adjustment, so that the industrial CCD cameras 13 can follow the chassis 100 to perform dynamic adjustment and monitoring of the position when welding the blade 200 at a specific position, thereby adjusting the angle and position of the CCD cameras, and detecting the blade 200 from multiple directions, improving the comprehensiveness of monitoring the welding of the blade 200 on the chassis 100.

[0038] As Figure 1 and Figure 10 shown in the figure, it further includes a transparent plate 10. A transparent plate 10 is fixedly installed on the top surface of the limiting annular cover 93. The transparent plate 10 is made of transparent tempered glass. The transparent plate 10 can contact and limit the top plate welded on the top of the blade 200 while not affecting the normal monitoring of the welding point of the blade 200 by the industrial CCD cameras 13, further improving the stability of the blade 200 when welding the top plate.

[0039] During the welding process of the chassis 100 and the blade 200, by enabling the fourth motor 14 on the bracket 11, the output shaft of the fourth motor 14 drives the rotating plate 12 to rotate intermittently around its rotation axis. The industrial CCD camera 13 rotates synchronously and intermittently with the rotating plate 12, enabling the industrial CCD camera 13 to capture the joint of the blade 200 and the chassis 100 from multiple angles. During the real-time capture of the welding position deviation by the industrial CCD camera 13, the CCD camera feeds the captured data back to the control system, facilitating the operator to timely adjust the clamping parts on the first electric slide rail 31 and the second electric slide rail 41 for fine-tuning. In cooperation with the first motor 6 driving the bidirectional lead screw 63 to rotate, through the lever action of the sliding block 61 and the hinge block 62, the angle of the clamping bracket 54 is secondarily compensated to ensure that the joints of the blade 200 and the chassis 100 during welding can be accurately aligned. After the preliminary welding of the chassis 100 and the blade 200 is completed, it enters the positioning and welding stage of the top plate. First, multiple electric push rods 91 circumferentially distributed on the outer side of the working plate 2 are synchronously activated. The push rods of the electric push rods 91 extend upward and push the mounting plate 92 and the limiting annular cover 93 to rise vertically, avoiding the area at the top of the blade 200 and providing space for the placement of the top plate. After the operator places the top plate on the top of the blade 200, by controlling the retraction of the electric push rod 91, the electric push rod 91 drives the limiting annular cover 93 to descend to the surface of the top plate. Since the edge side of the limiting annular cover 93 is designed as a continuous curved surface, the limiting annular cover 93 can smoothly contact the edge of the top plate when descending, and presses the top plate to the centered welding position through the curved surface, enabling the limiting annular cover 93 to cooperate with the transparent plate 10 to provide stable limitation for the top plate, ensuring that the top plate and the blade 200 are centered and aligned and the welding points at the top are aligned. When welding the blade 200 and the top plate, the welder uses an elevation angle. Similarly, the welding wire on the argon arc welding torch is inserted into the joint of the blade 200 and the top plate for rapid spot welding, enabling the preliminary welding and fixation between multiple blades 200 and the top plate. Subsequently, the entire fan impeller after the preliminary welding is removed from the fixture, and subsequent fine welding can be carried out, thereby improving the quality of welding the chassis 100 and the top plate on the blade 200 subsequently.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A welding jig for an industrial fan impeller, comprising a base (1) and a working plate (2), wherein the top of the base (1) is fixedly connected with the working plate (2); It is characterized in that It further comprises: A rotating ring (3), rotatably installed on the outer edge of the top surface of the working plate (2), and a plurality of electric slide rails I (31) are fixedly arranged at circumferential intervals on the top surface of the rotating ring (3); An inner ring plate (4), rotatably assembled at the central opening of the rotating ring (3), and a plurality of electric slide rails II (41) with the same number as the electric slide rails I (31) are fixedly arranged at circumferential intervals on the top surface of the inner ring plate (4); Positioning and clamping members (5), arranged on each of the electric slide rails I (31) and the electric slide rails II (41), and the positioning and clamping members (5) include: A cylinder (51), installed on the electric slide rail I (31) or the electric slide rail II (41); A sliding plate (52), fixedly installed on the piston rod of the cylinder (51), and a circular groove (521) is formed on the top of the sliding plate (52); A hinge shaft (53), fixedly connected to the top surface of the sliding plate (52); Clamping frames (54), there are two of them, which are vertically and staggeredly hinged on the hinge shaft (53); A guide shaft (55), arranged at one end of the clamping frame (54) far from the clamping surface, and the guide shaft (55) is in sliding fit with the circular groove (521) of the sliding plate (52); A first motor (6), fixedly installed on the sliding plate (52); Sliding blocks (61), there are two of them, which are respectively slidably installed on the sliding plate (52); Hinge blocks (62), respectively hinged on the two guide shafts (55), and the clamping frame (54) is movably connected to the corresponding sliding block (61) through the hinge block (62); A bidirectional lead screw (63), fixedly arranged on the output shaft of the first motor (6), and the two-way threads of the bidirectional lead screw (63) are respectively in threaded fit with the two sliding blocks (61); There are no less than 3 limiting members (21) on the working plate (2), and the limiting members (21) are used to limit the welding chassis (100) on the working plate (2). The limiting members (21) include clamping blocks (211), multi-stage push rods (212), screw rods (213), guide rods (214), connecting plates (215) and rubber blocks (216). The clamping blocks (211) are slidably arranged at circumferential intervals on the edge of the top surface of the working plate (2), the multi-stage push rods (212) for driving the clamping blocks (211) are fixedly installed on the working plate (2), two symmetrical through holes are formed on the clamping blocks (211), a screw rod (213) is threadedly connected to one of the through holes of the clamping block (211), a guide rod (214) is slidably connected to the other through hole of the clamping block (211), the screw rod (213) and the guide rod (214) are connected by a connecting plate (215), the screw rod (213) and the connecting plate (215) are in rotational fit, and rubber blocks (216) are arranged at the rod ends of the screw rod (213) and the guide rod (214) inside the clamping block (211); A second motor (7) is fixedly installed on the bottom surface of the working plate (2). A first gear (71) is fixedly installed on the output shaft of the second motor (7). A first toothed ring (72) is fixedly connected to the bottom of the inner ring plate (4). The teeth on the outer walls of the first gear (71) and the first toothed ring (72) are meshed with each other. A third motor (8) is also fixedly installed on the bottom surface of the working plate (2). The output shaft of the third motor (8) rotatably penetrates through the working plate (2) and then is fixedly provided with a second gear (81). A second toothed ring (82) is fixedly provided on the inner side of the rotating ring (3). The teeth on the inner sides of the second gear (81) and the second toothed ring (82) are meshed with each other.

2. The welding jig for an industrial fan impeller according to claim 1, characterized in that, A positioning assembly (9) is arranged on the outer side of the working plate (2). The positioning assembly (9) is used to position the top plate welded to the top of the blade (200) from the top. The positioning assembly (9) includes an electric push rod (91), a mounting plate (92) and a limiting annular cover (93). Not less than 3 electric push rods (91) are circumferentially and spacedly fixedly installed on the outer side surface of the working plate (2). A mounting plate (92) is fixedly provided on the push rod of the electric push rod (91). The limiting annular cover (93) is fixedly connected between the multiple mounting plates (92).

3. The welding jig for an industrial fan impeller according to claim 2, characterized in that, The central position of the limiting annular cover (93) is a circular opening. The top of the limiting annular cover (93) smoothly transitions to the bottom and forms a continuous curved surface.

4. The welding jig for an industrial fan impeller according to claim 3, characterized in that A bracket (11) that supports upward is fixedly connected to the mounting plate (92). A rotating plate (12) is rotatably installed on the upper part of the bracket (11). Industrial CCD cameras (13) are assembled on the bottom surfaces at both ends of the rotating plate (12). The industrial CCD cameras (13) are used to vertically monitor the accuracy of welding the blade (200) on the surface of the chassis (100) from the top down. A fourth motor (14) is fixedly installed on the top of the bracket (11). The output shaft of the fourth motor (14) is connected to the rotation central axis of the rotating plate (12).

5. The welding jig for an industrial fan impeller according to claim 4, characterized in that, A transparent plate (10) is further included. The transparent plate (10) is fixedly provided on the top surface of the limiting annular cover (93). The transparent plate (10) is made of transparent tempered glass.

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