Welding jig for industrial fan impeller

Abstract

The invention relates to the technical field of welding, in particular to an industrial fan impeller welding jig which comprises a base and a working plate, the working plate is fixedly connected to the top of the base, and the working plate is a circular plate with an opening in the center; the rotating ring is rotationally installed on the outer edge of the top face of the working plate, and a plurality of first electric sliding rails are fixedly arranged on the top face of the rotating ring in the circumferential direction at intervals; the inner ring plate is rotationally assembled at the central opening of the rotating ring, and second electric sliding rails with the same number as the first electric sliding rails are fixedly arranged on the top surface of the inner ring plate in the circumferential direction at intervals; the positioning clamping pieces are arranged on the first electric sliding rails and the second electric sliding rails. Through mutual cooperation of the positioning clamping pieces on the first electric sliding rail and the second electric sliding rail, each blade can be accurately positioned and clamped, fine adjustment is carried out through the air cylinder and the two-way lead screw driven by the first motor, and therefore the welding accuracy of the blades on the chassis is effectively improved.

Description

Technical Field

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

[0002] With the development of industrial technology, the requirements for fan performance are getting higher and higher, which is not only reflected in the efficiency of the fan, but also in its durability and operating stability. Traditional manual welding methods are difficult to meet the high-precision and high-quality production requirements. Therefore, the development of special welding fixtures has become a key step in improving production efficiency and product quality.

[0003] The prior art discloses a fan impeller welding fixture (Announcement No. CN211072427U), comprising a base, a placement plate movably sleeved on the top of the base, a fixing rod fixedly connected to the top of the placement plate, a center rod movably sleeved on the top of the fixing rod, and an umbrella-shaped wheel fixedly connected to the bottom of the placement plate; the fixture is pushed outwards through a fixing plate to fix the fan impeller, and then the placement plate is driven to rotate by the umbrella-shaped wheel, so that the fan impeller can be simply fixed and welded and rotated. However, there are still certain limitations in use. Since the initial splicing of the blades usually relies on manual spot welding positioning according to the auxiliary line of the chassis, the fixture itself lacks the initial splicing positioning function, which is easy to cause deviations in the angle and position of the blades during manual welding, thereby affecting the subsequent welding quality of the impeller, and lacks a fine-tuning mechanism, making it difficult to achieve subtle position corrections of the blades. Although the angle can be fixed by the adjusting wheel and limit 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 which is easy to operate and has high welding precision.

[0005] The objective of the present invention is achieved through the following technical solutions: a welding jig for an industrial fan impeller, comprising a base and a working plate, the top of the base being fixedly connected to the working plate; further comprising: a rotating ring, rotatably mounted on the outer edge of the top surface of the working plate, the top surface of the rotating ring being fixedly provided with a plurality of electric slide rails 1 at circumferential intervals; an inner ring plate, rotatably mounted at the central opening of the rotating ring, the top surface of the inner ring plate also being fixedly provided with electric slide rails 2 having the same number as the electric slide rails 1 at circumferential intervals; a positioning clamp, provided on each of the electric slide rails 1 and 2, the positioning clamp comprising: a cylinder, installed on the electric slide rail 1 or the electric slide rail 2; a slide plate, fixedly mounted A circular groove is provided on the top of the slide plate, which is mounted on the piston rod of the cylinder; a hinge shaft is fixedly connected to the top surface of the slide plate; a clamping frame is provided with two hinged on the hinge shaft in an up-and-down staggered manner; a guide shaft is arranged at the end of the clamping frame away from the clamping surface, and the guide shaft and the circular groove of the slide plate are slidably matched; a first motor is fixedly mounted on the slide plate; two sliding blocks are provided and are slidably mounted on the slide plate respectively; hinge blocks are respectively hinged on the two guide shafts, and the clamping frame is movably connected to the corresponding sliding blocks through the hinge blocks; a bidirectional screw is fixedly arranged on the output shaft of the first motor, and the bidirectional threads of the bidirectional screw are respectively matched with the threads of the two sliding blocks.

[0006] Furthermore, the working plate is provided with no less than 3 limit members, and the limit members are used to limit the welding chassis on the working plate. The limit members include a clamping block, a multi-stage push rod, a screw, a guide rod, a connecting plate and a rubber block. The clamping blocks are circumferentially spaced and slidingly arranged on the edge of the top surface of the working plate. A multi-stage push rod that drives the clamping block is fixedly mounted on the working plate. The clamping block has two symmetrical through openings, one of which is threadedly connected to a screw, and the other is slidably connected to a guide rod. The screw and the guide rod are connected by a connecting plate, and the screw and the connecting plate are rotatably matched. Rubber blocks are arranged at the rod ends of the screw and the guide rod located inside the clamping block.

[0007] Furthermore, a second motor is fixedly mounted on the bottom surface of the working plate, a gear 1 is fixedly mounted on the output shaft of the second motor, a gear ring 1 is fixedly connected to the bottom of the inner ring plate, and the teeth of the gear 1 and the outer wall of the gear ring 1 are meshed with each other.

[0008] Furthermore, a third motor is fixedly installed on the bottom surface of the working plate, and a gear 2 is fixedly installed after the output shaft of the third motor rotates through the working plate, and a gear ring 2 is fixedly installed on the inner side of the rotating ring, and the teeth of the gear 2 and the inner side of the gear ring 2 are meshed with each other.

[0009] Furthermore, a positioning assembly is provided on the outer side of the working plate, and the positioning assembly is used to position the top plate welded on the top of the blade from the top. The positioning assembly includes an electric push rod, a mounting plate and a limiting annular cover. No less than 3 electric push rods are fixedly installed at circumferential intervals on the outer side surface of the working plate. A mounting plate is fixed on the push rod of the electric push rod, and a limiting annular cover is fixedly connected between the mounting plates at multiple locations.

[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, a bracket supporting upward is fixedly connected to the mounting plate, a rotating plate is rotatably mounted on the upper part of the bracket, industrial CCD cameras are mounted on the bottom surfaces of both ends of the rotating plate, and the industrial CCD cameras are used to vertically monitor the accuracy of the welding blades on the chassis surface from the top downward, and a fourth motor is fixedly mounted on the top of the bracket, and the output shaft of the fourth motor is connected to the rotating central axis of the rotating plate.

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

[0013] Beneficial effects:

[0014] 1. The present invention can accurately position and clamp each blade by the cooperation of the positioning clamps on the electric slide rail 1 and the electric slide rail 2, and perform fine adjustments through the bidirectional screw driven by the cylinder and the first motor, thereby effectively improving the accuracy of the blade welding on the chassis.

[0015] 2. The present invention can drive the inner ring plate and the rotating ring to rotate through the second motor and the third motor, so that the positioning clamp can automatically adapt to the position adjustment requirements of the blade without manual adjustment.

[0016] 3. The industrial CCD camera of the present invention can monitor the accuracy of the welding blades on the chassis surface vertically from the top downward, and the fourth motor can drive the rotating plate to rotate, so that the CCD camera can follow the specific welding position of the chassis for dynamic adjustment and monitoring, thereby improving the quality of fan impeller welding.

[0017] 4. The present invention can also compress and limit the top plate to be welded on the top of the blade from the top through a positioning assembly composed of an electric push rod, a mounting plate and a limiting annular cover, thereby ensuring the accuracy and stability of the top plate welding to the top of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure 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 It is a schematic diagram of the positioning and clamping blade of the positioning and clamping member of the present invention.

[0021] Figure 4 This is a diagram showing the connection relationship among the inner ring plate, cylinder, slide plate, clamping frame and other components of the present invention.

[0022] Figure 5 It is a schematic diagram of the matching relationship of the specific components of the positioning clamp of the present invention.

[0023] Figure 6 It is a schematic diagram of specific components of the limiter of the present invention.

[0024] Figure 7 This is a diagram showing the matching relationship between the inner ring plate, the second motor, the gear 1 and the gear ring 1 of the present invention.

[0025] Figure 8 This is a connection diagram of the third motor, gear 2 and gear ring 2 of the present invention.

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

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

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

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is 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 only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept 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 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 where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] Embodiment 1: A welding fixture for an industrial fan impeller, such as Figure 2-Figure 5As shown, it includes a base 1 and a working plate 2. The base 1 is an assembly carrier of the welding fixture. The top of the base 1 is fixedly connected to the working plate 2, and the working plate 2 is a circular plate with a central opening; it also includes: a rotating ring 3, which is rotatably mounted on the outer edge of the top surface of the working plate 2, and the top surface of the rotating ring 3 is fixedly provided with a plurality of electric slide rails 31 at circumferential intervals; an inner ring plate 4, which is rotatably mounted at the central opening of the rotating ring 3, and the top surface of the inner ring plate 4 is also fixedly provided with electric slide rails 41 with the same number as the electric slide rails 31 at circumferential intervals; positioning The clamping member 5 is arranged on each electric slide rail 1 31 and the electric slide rail 2 41. The positioning clamping member 5 on the electric slide rail 1 31 and the electric slide rail 2 41 cooperates with each other to position and clamp a blade 200, and completes the welding operation of each blade 200 on the chassis 100 placed on the working plate 2. The positioning clamping member 5 includes: a cylinder 51, which is installed on the electric slide rail 1 31 or the electric slide rail 2 41; a slide plate 52, which is fixedly installed on the piston rod of the cylinder 51, and a round Slot 521; hinge shaft 53, fixed to the top surface of slide plate 52; clamping frame 54, provided with two and staggered up and down hinged on hinge shaft 53, two clamping frames 54 on slide plate 52 constitute a clamp for clamping one side of blade 200, electric slide rail 1 31 and electric slide rail 2 41 clamping frames 54 in opposite directions; guide shaft 55, arranged at one end of clamping frame 54 away from clamping surface, guide shaft 55 and circular groove 521 of slide plate 52 slidingly cooperate; first motor 6, fixedly mounted on slide plate 52; sliding Block 61 is provided with two blocks and are slidably installed on the slide plate 52 respectively; the hinged blocks 62 are respectively hinged on the two guide shafts 55, and the clamping frame 54 is movably connected with the corresponding sliding blocks 61 through the hinged blocks 62; the bidirectional screw rod 63 is fixed on the output shaft of the first motor 6, and the bidirectional threads of the bidirectional screw rod 63 are respectively matched with the threads of the two sliding blocks 61, and a guide track is provided on the slide plate 52 to match the sliding limit of the two sliding blocks 61, and the extension direction of the guide track is consistent with the extension direction of the bidirectional screw rod 63.

[0032] Place the chassis 100 stably on the working plate 2, and then rotate and adjust the positioning clamps 5 of the rotating ring 3 and the inner ring plate 4 respectively. After using the two positioning clamps 5 to preliminarily limit the multiple blades 200 with reference to the welding line on the chassis 100, the cylinder 51 can adjust the clamping position of the clamping frame 54. The first motor 6 drives the sliding block 61 to move towards each other through the bidirectional screw rod 63, so that the clamping frame 54 is driven to rotate by the lever of the sliding block 61 with the hinge shaft 53 as the rotation center, and the blade 200 is finely adjusted and positioned to improve the accuracy of welding of the blade 200 on the chassis 100.

[0033] like Figure 2 , Figure 3 and Figure 6As shown, three limit members 21 are provided on the working plate 2, and the limit members 21 are used to limit the welding chassis 100 of different sizes on the working plate 2. The limit members 21 include a clamping block 211, a multi-stage push rod 212, a screw 213, a guide rod 214, a connecting plate 215 and a rubber block 216. The clamping blocks 211 are slidably arranged at intervals on the top edge of the working plate 2 in the circumferential direction. The multi-stage push rod 212 driving the clamping block 211 is fixedly installed on the working plate 2. The clamping block 211 has two symmetrical through openings, one of which is threadedly connected to a screw 213, and the other through opening of the clamping block 211 is threadedly connected to a screw 213. A guide rod 214 is slidably connected, and the screw rod 213 and the guide rod 214 are connected into a whole through a connecting plate 215. The screw rod 213 and the connecting plate 215 rotate in coordination, and 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 block 211 is initially limited on the chassis 100 by driving the multi-stage push rods 212 at multiple locations. The screw rod 213 is turned to synchronously drive the rubber block 216 in the clamping block 211 to extend through the connecting plate 215 and further limit the chassis 100, so that the limiting member 21 can dynamically adapt to the stable limitation of chassis 100 of different sizes.

[0034] like Figure 7 and Figure 8 As shown, a second motor 7 is fixedly installed on the bottom surface of the working plate 2, and a gear 71 is fixedly installed on the output shaft of the second motor 7. A gear ring 72 is fixedly connected to the bottom of the inner ring plate 4. The teeth of the gear 71 and the outer wall of the gear ring 72 are meshed with each other. The second motor 7 drives the gear ring 72 to rotate through the gear 71, so that the positioning clamp 5 on the inner ring plate 4 can adapt to the blade 200 and automatically adjust the position; a third motor 8 is also fixedly installed on the bottom surface of the working plate 2, and the output shaft of the third motor 8 rotates and passes through the working plate 2 and is fixed with a gear 2 81, and a gear ring 2 82 is fixed on the inner side of the rotating ring 3. The teeth of the gear 2 81 and the inner side of the gear ring 2 82 are meshed with each other. The third motor 8 drives the gear ring 2 82 to rotate through the gear 2 81, so that the positioning clamp 5 on the rotating ring 3 can also adapt to the blade 200 and automatically adjust the position.

[0035] When the welding fixture is used to weld the impeller of an industrial fan, the electric slide rail 241 on the inner ring plate 4 is first activated to make the positioning clamp 5 on the inner ring plate 4 retract inward to avoid the position where the chassis 100 is placed, and then the chassis 100 to be welded is placed on the top surface of the working plate 2, and the multi-stage push rods 212 at multiple locations on the working plate 2 are started. The push rods of the multi-stage push rods 212 drive the clamping block 211 to slide along the edge of the working plate 2 to the outside of the chassis 100, and preliminarily limit the position of the chassis 100, and then by rotating the screw rod 213, the screw rod 213 drives the connecting plate 215 through the thread, so that the screw rod 213 and the rubber block 216 at the end of the guide rod 214 are simultaneously The first step is to extend it toward 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 fixed in the center. After the chassis 100 is positioned, the electric slide rail 1 31 on the rotating ring 3 and the electric slide rail 2 41 on the inner ring plate 4 are started. The electric slide rail 1 31 and the electric slide rail 2 41 will drive the corresponding positioning clamping member 5 to move circumferentially along the working plate 2. The operator places the blade 200 between the corresponding clamping members at the inner and outer locations of the chassis 100, starts the cylinder 51 to push the slide plate 52 to approach the edge of the clamping blade 200, and adjusts the clamping frame 54 on the blocking slide plate 52 to a suitable clamping position at both ends of the clamping blade 200. After that, the cylinder 51 is closed and the first motor 6 is turned on at the same time. The output shaft of the first motor 6 will drive the bidirectional screw 63 to rotate. The two reverse threads of the bidirectional 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 block 62 to form a lever structure, which pushes the upper and lower staggered clamping frames 54 to rotate around the hinge shaft 53. Since the circular groove 521 on the top of the slide plate 52 slides with the guide shaft 55, the movement of the clamping frame 54 is ensured to be stable, so as to accurately clamp the edges of the two sides of the blade 200. In this process, the second motor 7 and the third motor 8 respectively drive the gear 1 71 to cooperate with the gear 2 81 to rotate. The wheel 1 71 and the gear 2 81 respectively drive the gear ring 1 72 of the inner ring plate 4 and the gear ring 2 82 of the rotating ring 3 to rotate synchronously, so that the clamping part can move accurately in the circumferential direction to ensure that the multiple blades 200 are evenly distributed along the chassis 100 and accurately aligned with the welding line. Then manual welding begins. The welder holds a argon arc welding gun and extends the welding wire on the argon arc welding gun 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 fixation of the chassis 100 and multiple blades 200.

[0036] Embodiment 2: Based on embodiment 1, Figure 1 and Fig. 9As shown, a positioning assembly 9 is provided on the outside of the working plate 2. The positioning assembly 9 is used to position the top plate welded on 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. Three electric push rods 91 are fixedly installed at intervals in the circumferential direction on the outer side of the working plate 2. The push rods of the electric push rods 91 are fixedly provided with mounting plates 92. The limiting annular covers 93 are fixedly connected between multiple mounting plates 92. When the top plate is welded on the top of the blade 200, the electric push rods 91 at multiple locations are synchronously activated. The electric push rod 91 drives the limiting annular cover 93 to be raised and lowered 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 from the top by the limiting annular cover 93, 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 and forms a continuous curved surface. The limiting annular cover 93 is used for centering and limiting when the top plate of the blade 200 is welded, so as to improve the accuracy of welding the top plate to the top of the blade 200.

[0037] like Figure 1 and Fig.10 As shown, a bracket 11 supporting upward is fixedly connected to the mounting plate 92, a rotating plate 12 is rotatably mounted on the upper part of the bracket 11, and industrial CCD cameras 13 are mounted on the bottom surfaces of both ends of the rotating plate 12. The industrial CCD camera 13 is used to vertically monitor the accuracy of welding blades 200 on the chassis 100 from the top downward. A fourth motor 14 is fixedly mounted on the top of the bracket 11, and the output shaft of the fourth motor 14 is connected to the rotating center 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 camera 13 on the rotating plate 12 to perform intermittent rotation adjustment, so that the industrial CCD camera 13 can dynamically adjust the monitoring position when following the chassis 100 to weld the blade 200 at a specific position, thereby adjusting the angle and position of the CCD camera, and detecting the blade 200 from multiple directions, thereby improving the comprehensiveness of monitoring the welding blade 200 on the chassis 100.

[0038] like Figure 1 and Fig.10 As shown, a transparent plate 10 is also included. The top surface of the limiting annular cover 93 is fixed with the transparent plate 10. The transparent plate 10 is made of transparent tempered glass. The transparent plate 10 can contact and be limited on the top plate welded on the top of the blade 200 without affecting the normal monitoring of the welding point of the blade 200 by the industrial CCD camera 13, thereby 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, the fourth motor 14 on the bracket 11 is activated, and the output shaft of the fourth motor 14 drives the rotating plate 12 to intermittently rotate around its rotation axis. The industrial CCD camera 13 rotates intermittently with the rotating plate 12, so that the industrial CCD camera 13 can shoot the welded joint of the blade 200 and the chassis 100 from multiple angles. The industrial CCD camera 13 captures the welding position deviation in real time, and the CCD camera feeds back the shooting data to the control system, so that the operator can adjust the electric slide in time. The clamping parts on the rail 1 31 and the electric slide rail 2 41 are fine-tuned, and the first motor 6 drives the bidirectional screw 63 to rotate. Through the lever action of the sliding block 61 and the hinge block 62, the angle of the clamping frame 54 is compensated for twice to ensure that the welded seams of the blade 200 and the chassis 100 can be accurately aligned. After completing the preliminary welding of the chassis 100 and the blade 200, the positioning and welding stage of the top plate is entered. First, multiple electric push rods 91 distributed circumferentially on the outer side of the working plate 2 are synchronously started, and the push rods of the electric push rods 91 extend upward and push the installation plate 200 to move forward. The mounting plate 92 and the limiting annular cover 93 rise vertically, avoiding the area on 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, the electric push rod 91 is controlled to retract, and 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 press the top plate to the central welding position through the curved surface, so that the limiting annular cover 93 cooperates with the transparent plate 10 to form a top The plate provides a stable limit to ensure that the top plate is centered with the blade 200 and the welding points on the top are aligned. When welding the blade 200 and the top plate, the welder uses an elevated angle and inserts the welding wire on the argon arc welding gun into the joint between the blade 200 and the top plate for quick spot welding. This completes the preliminary welding and fixation between the multiple blades 200 and the top plate. After the preliminary welding is completed, the entire fan impeller is removed from the fixture and subsequent fine welding is performed, thereby improving the quality of subsequent welding of the chassis 100 and the top plate on the blade 200.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit 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 to the working plate (2); It is characterized in that Also includes: A rotating ring (3) is rotatably mounted on the outer edge of the top surface of the working plate (2), and a plurality of electric slide rails (31) are fixedly arranged at intervals in the circumferential direction on the top surface of the rotating ring (3); An inner ring plate (4) is rotatably mounted on the central opening of the rotating ring (3); the top surface of the inner ring plate (4) is also provided with electric slide rails (41) having the same number as the electric slide rails (31) at intervals in the circumferential direction; A positioning clamp (5) is provided on each of the electric slide rail 1 (31) and the electric slide rail 2 (41), and the positioning clamp (5) comprises: A cylinder (51) mounted on the electric slide rail 1 (31) or the electric slide rail 2 (41); A slide plate (52) is fixedly mounted on the piston rod of the cylinder (51), and a circular groove (521) is formed on the top of the slide plate (52); A hinge shaft (53) fixedly connected to the top surface of the slide plate (52); The clamping frame (54) is provided with two clamping frames (54) which are hinged to the hinge shaft (53) in an alternating manner up and down; A guide shaft (55) is arranged at an end of the clamping frame (54) away from the clamping surface, and the guide shaft (55) and the circular groove (521) of the slide plate (52) are slidably matched; A first motor (6) is fixedly mounted on the slide plate (52); Two sliding blocks (61) are provided and are respectively slidably mounted on the sliding plate (52); The hinge blocks (62) are respectively hinged on the two guide shafts (55), and the clamping frame (54) is movably connected to the corresponding sliding blocks (61) via the hinge blocks (62); The bidirectional screw rod (63) is fixedly mounted on the output shaft of the first motor (6), and the bidirectional threads of the bidirectional screw rod (63) are respectively matched with the threads of the two sliding blocks (61).

2. The welding jig for an industrial fan impeller according to claim 1, characterized in that: The working plate (2) is provided with no less than three limiting members (21), the limiting members (21) being used to limit the welding chassis (100) on the working plate (2), the limiting members (21) comprising a clamping block (211), a multi-stage push rod (212), a screw rod (213), a guide rod (214), a connecting plate (215) and a rubber block (216), the clamping blocks (211) being slidably arranged at circumferential intervals on the edge of the top surface of the working plate (2), and the multi-stage push rod (212) for driving the clamping blocks (211) being fixedly mounted on the working plate (2). ), the clamping block (211) is provided with two symmetrical through openings, one of the through openings of the clamping block (211) is threadedly connected to a screw rod (213), the other through opening of the clamping block (211) is slidably connected to a guide rod (214), the screw rod (213) and the guide rod (214) are connected via a connecting plate (215), the screw rod (213) and the connecting plate (215) are rotatably matched, and the rod ends of the screw rod (213) and the guide rod (214) located inside the clamping block (211) are both provided with rubber blocks (216).

3. A welding jig for an industrial fan impeller as claimed in claim 2, characterized in that: A second motor (7) is fixedly mounted on the bottom surface of the working plate (2); a gear 1 (71) is fixedly mounted on the output shaft of the second motor (7); a gear ring 1 (72) is fixedly connected to the bottom of the inner ring plate (4); the teeth of the gear 1 (71) and the outer wall of the gear ring 1 (72) are meshed with each other.

4. The welding jig for an industrial fan impeller as claimed in claim 3, characterized in that: A third motor (8) is also fixedly mounted on the bottom surface of the working plate (2); an output shaft of the third motor (8) rotates through the working plate (2) and is fixedly provided with a second gear (81); a second gear 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 gear ring (82) mesh with each other.

5. The welding jig for an industrial fan impeller as claimed in claim 4, characterized in that: A positioning assembly (9) is arranged on the outside of the working plate (2), and the positioning assembly (9) is used to position a top plate welded on the top of the blade (200) from the top. The positioning assembly (9) comprises an electric push rod (91), a mounting plate (92) and a limiting annular cover (93). No less than three electric push rods (91) are fixedly mounted at intervals in a circumferential direction on the outer side surface of the working plate (2), and the mounting plate (92) is fixedly mounted on the push rod of the electric push rod (91). The limiting annular cover (93) is fixedly connected between the mounting plates (92) at multiple locations.

6. The welding jig for an industrial fan impeller as claimed in claim 5, characterized in that: 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.

7. A welding jig for an industrial fan impeller as claimed in claim 6, characterized in that: The mounting plate (92) is fixedly connected to a bracket (11) supporting upward, a rotating plate (12) is rotatably mounted on the upper part of the bracket (11), industrial CCD cameras (13) are mounted on the bottom surfaces of both ends of the rotating plate (12), and the industrial CCD cameras (13) are used to vertically monitor the accuracy of the welding blades (200) on the surface of the chassis (100) from the top downward, and a fourth motor (14) is fixedly mounted on the top of the bracket (11), and the output shaft of the fourth motor (14) is connected to the rotating center axis of the rotating plate (12).

8. The welding jig for an industrial fan impeller as claimed in claim 7, characterized in that: It also comprises a transparent plate (10), the top surface of the limiting annular cover (93) is fixedly provided with the transparent plate (10), and the transparent plate (10) is made of transparent tempered glass.

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