Nozzle connecting ring welding fixture

Abstract

The present invention discloses a nozzle connecting ring welding fixture, which relates to the technical field of welding fixtures, including a workbench; a flip assembly is installed on the workbench; the flip assembly includes a placement seat; a concave cavity is opened in the center of the placement seat for convenient placement of the nozzle; two groups of fixing plates are integrally arranged on the four corners of one side of the placement seat; the fixing plate at one end is movably connected by a first connecting plate and a second connecting plate; the fixing plate at the other end is movably connected to the fourth connecting plate by a third connecting plate; the second connecting plate and the fourth connecting plate are both mounted on the first rotating shaft at one end away from the first connecting plate and the third connecting plate; the connecting ring is placed on the placement table between multiple clamps in the positioning assembly, and the cooperation between the semicircular gear and the gear ring is driven by the second driving motor to realize the simultaneous rotation of the driven gears connected to the rotating shafts at the bottom of the multiple clamps, so that the multiple clamps can clamp and fix the connecting ring, so that the coaxiality between the connecting ring and the nozzle can be effectively guaranteed during clamping.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of welding fixtures, in particular to a nozzle connecting ring welding fixture. Background Art

[0002] The nozzle connecting ring is mainly used to adjust the spray shape of the nozzle during operation. By adjusting the connecting ring, it is effectively guaranteed that the mist drops are uniform during spraying. In addition, the sealing setting between the connecting ring and the nozzle during operation effectively ensures that there is no leakage inside the nozzle during operation.

[0003] When sealing between the nozzle and the connecting ring, the connecting ring and the nozzle need to fit tightly together. However, the traditional welding fixture cannot effectively ensure the coaxiality between the connecting ring and the nozzle during welding. Moreover, the connecting ring and the nozzle are rotated during welding, which will cause the nozzle and the connecting ring to be offset. In this way, the spraying state of the nozzle during operation cannot be effectively adjusted through the connecting ring.

[0004] After searching, Chinese patent application number CN201520373235.5 discloses an aircraft turbine volute nozzle connecting ring welding fixture; it includes a base for resisting the end face of the outlet nozzle, a central axis is vertically arranged in the middle of the base, a guide column and a support plate for defining the inner circle of the outlet nozzle are connected to the outer surface of the central axis, a nozzle connecting ring expansion tube is arranged on the upper side of the support plate, the nozzle connecting ring fixing device includes two semi-annular expansion blocks separated from each other, the nozzle connecting ring expansion tube is sleeved on the outside of the central axis, a conical groove is provided in the middle of the nozzle connecting ring expansion tube, a pressure rod for separating the two expansion blocks to both sides is provided above the nozzle connecting ring expansion tube, the pressure rod is sleeved on the outside of the central axis, a fastening nut is provided on the upper end of the pressure rod, and the fastening nut is threadedly connected to the central axis;

[0005] The structure in the above patent supports the connecting ring internally by two expansion blocks during welding to achieve stability during welding. However, during the welding process, the connecting ring is fixed in the concave cavity between the first flange and the second flange. In this way, during the welding process, the flange will block the welding gun, making it impossible to effectively ensure that the welding gun is close to the connecting ring and the nozzle, and the welding effect cannot be achieved.

[0006] Therefore, the present invention designs a nozzle connecting ring welding fixture. In this device, the connecting ring is placed in the positioning assembly, and the second drive motor drives the semicircular gear to cooperate with the gear ring at the bottom of the disc, so that the gear ring is simultaneously cooperated with multiple driven gears, and multiple clamping plates are used to position and clamp the connecting ring, ensuring that when the internal support spring drives the connecting ring to move, it is coaxial with the nozzle. The nozzle is transferred to the concave cavity opened in the center of the placement seat through the loading rack. During the downward movement of the movable plate in the compensation assembly, the gear plate and the matching gear are engaged by the connecting rod; the matching gear and the fourth gear are installed on the first rotating shaft, and the fourth gear is connected to the third gear on the second rotating shaft through the first toothed belt, so that the second rotating shaft drives the placement seat to rotate, so that the placement seat rotates from a vertical state to a horizontal state, ensuring the cooperation between the nozzle and the connecting ring. When the placement seat rotates to the horizontal state, the push rod of the electric push cylinder drives the internal support spring to enter the interior of the connecting ring to achieve internal support clamping, and the multiple clamping plates are opened to achieve cooperation between the connecting ring and the nozzle. After the connecting ring and the nozzle are attached, the connecting ring is welded by the welding robot arm. Summary of the Invention

[0007] The purpose of the present invention is to provide a nozzle connecting ring welding fixture to solve the technical problems mentioned in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A nozzle connecting ring welding fixture comprises a workbench; a flip assembly is installed on the workbench; the flip assembly includes a placement seat; a concave cavity is opened in the center of the placement seat for convenient nozzle placement; a fixing plate is integrally provided on the four corners of one side of the placement seat; the fixing plate at one end is movably connected to the first connecting plate and the second connecting plate; the fixing plate at the other end is movably connected to the fourth connecting plate through the third connecting plate; the second connecting plate and the fourth connecting plate are both mounted on the first rotating shaft at one end away from the first connecting plate and the third connecting plate; the first rotating shaft cooperates with the seat bearing on the workbench to realize support for the first rotating shaft, and the movably support of the placement seat is realized by the seat bearing and the support frame;

[0010] A fourth gear is fixedly installed in the middle of the first rotating shaft; and mating gears are symmetrically arranged on both sides of the fourth gear; one side of two of the mating gears is mated with the gear plate;

[0011] Among the two sets of fixed plates, a second rotating shaft is fixedly connected between the fixed plates connected to the first connecting plate; a third gear is fixedly mounted on the second rotating shaft; the third gear cooperates with a fourth gear on the first rotating shaft via a first toothed belt; the first rotating shaft drives the fourth gear to rotate clockwise, and the fourth gear is connected to the third gear mounted on the second rotating shaft via the first toothed belt, so that the second rotating shaft drives the placement seat to rotate;

[0012] The two ends of the first rotating shaft are mounted in cooperation with the seat bearings provided on the workbench; the second rotating shaft is also mounted in cooperation with the two support frames; the bottom of the support frame is fixedly mounted on the workbench;

[0013] As a further technical solution of the present invention, the workbench is fixedly installed with a compensation component on one side of the flip component; the compensation component includes a support frame; a first gear and a second gear are cooperatively installed inside the support frame; one of them is connected to the first driving motor; a second toothed belt is cooperated between the first gear and the second gear; the second toothed belt is fixedly connected to the movable plate; two sets of rollers are cooperated at the joint of the movable plate and the support frame; the first driving motor drives the first gear or the second gear to rotate, and the second toothed belt cooperated between the first gear and the second gear drives the movable plate on one side of the support frame to move up and down, and the two sets of rollers effectively ensure the smooth movement of the movable plate, and at the same time, the compensation of the length of the electric push cylinder push rod is achieved through the movement of the movable plate;

[0014] As a further technical solution of the present invention, an electric push cylinder is installed at the bottom of one end of the movable plate away from the support frame; the push rod of the electric push cylinder is fixedly installed with the inner support spring piece; the inner support spring piece is arranged in a cross shape; and the edge of the inner support spring piece is arranged at an angle; after the inner support spring piece enters the connecting ring, the inclined edge effectively realizes the internal support of the connecting rings of different diameters;

[0015] As a further technical solution of the present invention, a positioning assembly is provided between the inner supporting spring piece and the flip assembly; the positioning assembly comprises a disc; a plurality of clamping plates are movably mounted on one side of the disc close to the inner supporting spring piece; a placement platform is provided on the inner side of the clamping plates for facilitating the placement of the connecting ring;

[0016] As a further technical solution of the present invention, the bottom of the clamping plate cooperates with the driven gear through the rotating shaft passing through the disc; the exterior of the plurality of the driven gears is meshed and connected with the gear ring; the gear ring is fitted and installed with the plurality of L-shaped frames provided at the bottom of the disc; the gear ring is effectively supported by the L-shaped frames to ensure that it does not deviate when cooperating with the plurality of driven gears; and the plurality of clamping plates are opened or closed simultaneously to achieve clamping and positioning of the connecting ring;

[0017] As a further technical solution of the present invention, the disc is fixed to the support frame via two symmetrically arranged fixing plates; a second drive motor is provided between the fixing plates; a semicircular gear is fixedly mounted on the output shaft of the second drive motor; the semicircular gear is meshed with the gear ring; the gear ring is controlled by the swing of the semicircular gear, thereby effectively ensuring the accuracy of clamping;

[0018] As a further technical solution of the present invention, a connecting rod is fixedly installed at the bottom of the movable plate between the electric push cylinder and the support frame; the end of the connecting rod away from the movable plate is fixedly connected to the tooth plate; the connecting rod drives the tooth plate to move up and down, thereby realizing the rotation of the first rotating shaft, thereby realizing the flipping of the placement seat;

[0019] As a further technical solution of the present invention, the workbench is further equipped with a loading rack; when the loading rack and the placement seat are in a vertical state, the concave cavity is on the same axis;

[0020] As a further technical solution of the present invention, a welding robot arm is also installed on the workbench; wherein the welding robot arm is located in the middle of the loading rack and the compensation component.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When in use, the present invention places the connecting ring on a placement table between multiple clamping plates in the positioning assembly. The second drive motor drives the cooperation between the semicircular gear and the gear ring, so that the driven gears connected to the rotating shafts at the bottom of the multiple clamping plates rotate simultaneously, and the multiple clamping plates clamp and fix the connecting ring. In this way, the coaxiality between the connecting ring and the nozzle can be effectively ensured during clamping.

[0023] 2. In the present invention, a first drive motor drives the first gear or the second gear to rotate, and a second toothed belt engaged between the first gear and the second gear drives the movable plate on one side of the support frame to move up and down. When the movable plate moves downward, the distance moved by the movable plate is used to compensate for the length of the electric push cylinder push rod;

[0024] 3. In the present invention, when the movable plate moves downward, the connecting rod drives the toothed plate to move downward, meshing with the matching gear mounted on the first rotating shaft, so that the first rotating shaft drives the fourth gear to rotate clockwise. The fourth gear is connected to the third gear mounted on the second rotating shaft via the first toothed belt, so that the second rotating shaft drives the placement seat to rotate.

[0025] 4. In the present invention, during the rotation of the placement seat, the two sets of fixed plates are connected to the first and second connecting plates, and to the third and fourth connecting plates, respectively, through the first connecting plate. One end of the second and fourth connecting plates is connected to the first rotating shaft, effectively ensuring the stability of the placement seat's rotation.

[0026] 5. In the present invention, after the placement seat rotates from a vertical state to a horizontal state, the electric push cylinder drives the inner support spring to insert into the inner cavity of the connecting ring to achieve the inner support fixation of the connecting ring. The second drive motor drives the semicircular gear to reverse, realize the matching of the gear ring with multiple driven gears, and realize the multiple clamping plates to loosen the connecting ring. The push rod of the electric push cylinder extends downward, so that the connecting ring moves to the bottom of the disc and cooperates with the nozzle inside the concave cavity of the placement seat. The connecting ring and the nozzle are effectively welded and fixed by the welding robot arm;

[0027] 6. In the present invention, after welding is completed, the electric push cylinder is first used to drive the welded connecting ring and nozzle to move upward to be taken out of the concave cavity of the placement seat, and then the first drive motor drives the first gear and the second gear to reverse, so that the second toothed belt drives the movable plate to move upward, thereby facilitating the placement of the next workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0029] Figure 2 In the present invention Figure 1 main view.

[0030] Figure 3 In the present invention Figure 1 Schematic diagram of the rear structure.

[0031] Figure 4 In the present invention Figure 1 side view.

[0032] Figure 5 In the present invention Figure 4 Schematic diagram of the bottom structure.

[0033] Figure 6 In the present invention Figure 1 Schematic diagram of the splitting.

[0034] Figure 7 In the present invention Figure 6 Schematic diagram of the bottom structure. Schematic diagram of the bottom structure.

[0035] Figure 8 In the present invention Figure 6 Schematic diagram of the bottom structure of the flip component.

[0036] Figure 9 In the present invention Figure 1 A magnified view of the local structure at point A.

[0037] Figure 10 In the present invention Figure 1 A magnified view of the local structure at point B.

[0038] Figure 11 In the present invention Figure 8 A magnified view of the local structure at point C.

[0039] Figure 12 In the present invention Figure 7 Enlarged view of the local structure at point D.

[0040] In the figure: 1- working table, 2- compensation component, 20- support frame, 21- moving plate, 22- connecting rod, 23- second toothed belt, 24- first gear, 25- second gear, 26- first drive motor, 27- roller, 3- electric push cylinder, 4- inner support spring, 5- positioning component, 50- disc, 51- clamping plate, 510- placing table, 52- fixed plate 2, 53- second drive motor, 54- L-shaped frame, 55- gear ring, 56- driven gear, 57 -semicircular gear, 6-loading rack, 7-turning assembly, 70-placing seat, 71-first rotating shaft, 72-fixing plate 1, 73-first connecting plate, 74-second connecting plate, 75-second rotating shaft, 76-third gear, 78-first toothed belt, 79-support frame, 710-third connecting plate, 711-fourth connecting plate, 712-tooth plate, 713-matching gear, 714-fourth gear, 8-welding robot arm, 9-connecting ring, 10-nozzle. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figure 1 、 2 , 3, 4, 7, 8, 9, 11, in an embodiment of the present invention, a nozzle connecting ring welding fixture includes a workbench 1; a flip assembly 7 is installed on the workbench 1; the flip assembly 7 includes a placement seat 70; a concave cavity is provided in the center of the placement seat 70 for convenient placement of the nozzle 10; two sets of fixing plates 72 are integrally provided on the four corners of one side of the placement seat 70; the fixing plate 72 at one end is movably connected to the first connecting plate 73 and the second connecting plate 74; the fixing plate 72 at the other end is movably connected to the fourth connecting plate 711 through the third connecting plate 710; the second connecting plate 74 and the fourth connecting plate 711 are both mounted on the first rotating shaft 71 at one end away from the first connecting plate 73 and the third connecting plate 710;

[0043] A fourth gear 714 is fixedly mounted in the middle of the first rotating shaft 71 ; and mating gears 713 are symmetrically arranged on both sides of the fourth gear 714 ; one side of the two mating gears 713 is mated with the toothed plate 712 ;

[0044] In the two sets of fixed plates 72, a second rotating shaft 75 is fixedly connected between the fixed plates 72 connected to the first connecting plate 73; a third gear 76 is fixedly mounted on the second rotating shaft 75; the third gear 76 is engaged with the fourth gear 714 on the first rotating shaft 71 through a first toothed belt 78;

[0045] The two ends of the first rotating shaft 71 are mounted in cooperation with the seat bearings provided on the workbench 1; the second rotating shaft 75 is also mounted in cooperation with two support frames 79; the bottom of the support frame 79 is fixedly mounted on the workbench 1;

[0046] The workbench 1 is fixedly mounted with a compensation assembly 2 on one side of the flip assembly 7; the compensation assembly 2 includes a support frame 20; a first gear 24 and a second gear 25 are mounted inside the support frame 20; one of the first gears 24 and the second gear 25 is connected to a first drive motor 26; a second toothed belt 23 is connected between the first gear 24 and the second gear 25; the second toothed belt 23 is fixedly connected to the movable plate 21; two sets of rollers 27 are provided at the connection between the movable plate 21 and the support frame 20;

[0047] By adopting the above technical solution, when in use, the connecting ring 9 is placed on the placement table 510 between the multiple clamping plates 51 in the positioning assembly 5, and the second drive motor 53 drives the cooperation between the semicircular gear 57 and the gear ring 55, so that the driven gear 56 connected to the rotating shaft at the bottom of the multiple clamping plates 51 can rotate simultaneously, so that the multiple clamping plates 51 can clamp and fix the connecting ring 9. In this way, the coaxiality between the connecting ring 9 and the nozzle 10 can be effectively ensured during clamping.

[0048] Furthermore, the first drive motor 26 drives the first gear 24 or the second gear 25 to rotate, so that the second toothed belt 23 cooperates between the first gear 24 and the second gear 25 to drive the movable plate 21 on one side of the support frame 20 to move up and down. When the movable plate 21 moves downward, the distance moved by the movable plate 21 is used to compensate for the length of the push rod of the electric push cylinder 3.

[0049] See also Figure 1-5 , 12; In this embodiment, the bottom of the movable plate 21 away from the end of the support frame 20 is equipped with an electric push cylinder 3; the push rod of the electric push cylinder 3 is fixedly installed with the inner support spring 4; the inner support spring 4 is cross-shaped; and the edge of the inner support spring 4 is inclined;

[0050] Specifically, a positioning assembly 5 is provided between the inner support spring piece 4 and the flip assembly 7. The positioning assembly 5 includes a disk 50. A plurality of clamping plates 51 are movably mounted on one side of the disk 50 near the inner support spring piece 4. A placement table 510 is provided on the inner side of the clamping plates 51 for facilitating placement of the connecting ring 9.

[0051] The bottom of the clamping plate 51 is engaged with the driven gear 56 via a rotating shaft that passes through the disc 50; the outer portions of the driven gears 56 are meshed with the gear ring 55; the gear ring 55 is fitted with the multiple L-shaped frames 54 provided at the bottom of the disc 50;

[0052] By adopting the above technical solution, when the movable plate 21 moves downward, the connecting rod 22 drives the toothed plate 712 to move downward, thereby engaging with the matching gear 713 installed on the first rotating shaft 71, so that the first rotating shaft 71 drives the fourth gear 714 to rotate clockwise. The fourth gear 714 is connected to the third gear 76 installed on the second rotating shaft 75 through the first toothed belt 78, so that the second rotating shaft 75 drives the placement seat 70 to rotate.

[0053] During the rotation of the placement seat 70, the two sets of fixing plates 1 72 are connected to the second connecting plate 74 and the third connecting plate 710 and the fourth connecting plate 711 respectively through the first connecting plate 73, and one end of the second connecting plate 74 and the fourth connecting plate 711 is connected to the first rotating shaft 71, effectively ensuring the rotation stability of the placement seat 70;

[0054] See also Figure 1-5 , 8, 11; In this embodiment, the disc 50 is fixedly mounted to the support frame 20 by two symmetrically arranged fixing plates 52; a second drive motor 53 is provided between the fixing plates 52; a semicircular gear 57 is fixedly mounted on the output shaft of the second drive motor 53; the semicircular gear 57 is meshed with the gear ring 55;

[0055] A connecting rod 22 is also fixedly installed at the bottom of the movable plate 21 between the electric push cylinder 3 and the support frame 20; the end of the connecting rod 22 away from the movable plate 21 is fixedly connected to the tooth plate 712;

[0056] By adopting the above technical solution, after the placement seat 70 is rotated from a vertical state to a horizontal state, the electric push cylinder 3 drives the internal support spring piece 4 to be inserted into the inner cavity of the connecting ring 9 to achieve the internal support fixation of the connecting ring 9. The second drive motor 53 drives the semicircular gear 57 to reverse, and the gear ring 55 is matched with multiple driven gears 56, so that multiple clamps 51 loosen the connecting ring 9. The push rod of the electric push cylinder 3 extends downward, so that the connecting ring 9 moves to the bottom of the disc 50 and cooperates with the nozzle 10 inside the concave cavity of the placement seat 70. The connecting ring 9 and the nozzle 10 are effectively welded and fixed by the welding robot arm 8.

[0057] In this embodiment, the workbench 1 is further equipped with a loading rack 6; the loading rack 6 and the cavity formed by the placement seat 70 when they are in a vertical state are on the same axis;

[0058] A welding robot arm 8 is also installed on the workbench 1; wherein the welding robot arm 8 is located between the loading rack 6 and the compensation component 2;

[0059] By adopting the above technical solution, after welding is completed, the welded connecting ring 9 and nozzle 10 are first driven upward by the electric push cylinder 3 to be taken out from the concave cavity of the placement seat 70, and then the first drive motor 26 drives the first gear 24 and the second gear 25 to reverse, so that the second toothed belt 23 drives the movable plate 21 to move upward, thereby facilitating the placement of the next workpiece.

[0060] The working principle of the present invention is as follows: when in use, the connecting ring 9 is placed on the placement platform 510 between the multiple clamping plates 51 in the positioning assembly 5, and the second drive motor 53 drives the cooperation between the semicircular gear 57 and the gear ring 55, so that the driven gear 56 connected to the rotating shaft at the bottom of the multiple clamping plates 51 can rotate simultaneously, so that the multiple clamping plates 51 can clamp and fix the connecting ring 9. In this way, the coaxiality between the connecting ring 9 and the nozzle 10 can be effectively ensured during clamping.

[0061] The first drive motor 26 drives the first gear 24 or the second gear 25 to rotate, so that the second toothed belt 23 cooperates between the first gear 24 and the second gear 25 to drive the movable plate 21 on one side of the support frame 20 to move up and down. When the movable plate 21 moves downward, the distance moved by the movable plate 21 is used to compensate for the length of the push rod of the electric push cylinder 3;

[0062] During the downward movement of the movable plate 21, the connecting rod 22 drives the toothed plate 712 to move downward, thereby engaging with the matching gear 713 installed on the first rotating shaft 71, so that the first rotating shaft 71 drives the fourth gear 714 to rotate clockwise. The fourth gear 714 is connected to the third gear 76 installed on the second rotating shaft 75 via the first toothed belt 78, so that the second rotating shaft 75 drives the placement seat 70 to rotate.

[0063] During the rotation of the placement seat 70, the two sets of fixing plates 7-2 are connected to the first connecting plate 73 and the second connecting plate 74 and the third connecting plate 710 and the fourth connecting plate 711 respectively, and one end of the second connecting plate 74 and the fourth connecting plate 711 is connected to the first rotating shaft 71, effectively ensuring the stability of the rotation of the placement seat 70;

[0064] After the placement seat 70 rotates from a vertical state to a horizontal state, the electric push cylinder 3 drives the inner support spring piece 4 to be inserted into the inner cavity of the connecting ring 9 to achieve the inner support fixation of the connecting ring 9. The second drive motor 53 drives the semicircular gear 57 to reverse, so that the gear ring 55 cooperates with the multiple driven gears 56, so that the multiple clamping plates 51 loosen the connecting ring 9. The push rod of the electric push cylinder 3 extends downward, so that the connecting ring 9 moves to the bottom of the disc 50 and cooperates with the nozzle 10 inside the concave cavity of the placement seat 70. The connecting ring 9 and the nozzle 10 are effectively welded and fixed by the welding robot arm 8.

[0065] After welding is completed, the welded connecting ring 9 and nozzle 10 are first driven upward by the electric push cylinder 3 to be taken out from the concave cavity of the placement seat 70, and then the first drive motor 26 drives the first gear 24 and the second gear 25 to reverse, so that the second toothed belt 23 drives the movable plate 21 to move upward, thereby facilitating the placement of the next workpiece.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A nozzle connecting ring welding fixture, characterized by: The invention comprises a workbench (1); a flip assembly (7) is mounted on the workbench (1); the flip assembly (7) comprises a placement seat (70); a concave cavity is provided in the center of the placement seat (70) for facilitating the placement of the nozzle (10); two sets of fixed plates (72) are integrally arranged on the four corners of one side of the placement seat (70); the fixed plate (72) at one end of the placement seat (70) is movably connected to the first connecting plate (73) and the second connecting plate (74); the fixed plate (72) at the other end of the placement seat (70) is movably connected to the fourth connecting plate (711) through the third connecting plate (710); the ends of the second connecting plate (74) and the fourth connecting plate (711) away from the first connecting plate (73) and the third connecting plate (710) are both mounted on the first rotating shaft (71); A fourth gear (714) is fixedly mounted in the middle of the first rotating shaft (71); and matching gears (713) are symmetrically arranged on both sides of the fourth gear (714); one side of the two matching gears (713) is connected to the toothed plate (712); In the two sets of fixed plates (72), a second rotating shaft (75) is fixedly connected between the fixed plates (72) connected to the first connecting plate (73); a third gear (76) is fixedly mounted on the second rotating shaft (75); the third gear (76) is connected to the fourth gear (714) on the first rotating shaft (71) through a first toothed belt (78); The two ends of the first rotating shaft (71) are mounted in cooperation with the seat bearings provided on the workbench (1); the second rotating shaft (75) is also mounted in cooperation with the two support frames (79); the bottom of the support frame (79) is fixedly mounted on the workbench (1); the workbench (1) is located on one side of the flip assembly (7) and is fixedly mounted with a compensation assembly (2); the compensation assembly (2) includes a support frame (20); a first gear (24) and a second gear (25) are mounted in cooperation with the interior of the support frame (20); wherein the second gear (25) is connected to the first driving motor (26); a second toothed belt (23) is mounted between the first gear (24) and the second gear (25); the second toothed belt (23) is fixed to the movable plate (21) connection; two sets of rollers (27) are provided at the connection between the movable plate (21) and the support frame (20); an electric push cylinder (3) is provided at the bottom of one end of the movable plate (21) away from the support frame (20); the push rod of the electric push cylinder (3) is fixedly installed with the inner support spring piece (4); the inner support spring piece (4) is arranged in a cross shape; and the edge of the inner support spring piece (4) is arranged in an inclined shape; a positioning component (5) is provided between the inner support spring piece (4) and the flip component (7); the positioning component (5) includes a disc (50); a plurality of splints (51) are movably provided on one side of the disc (50) close to the inner support spring piece (4); a placement table (510) is provided on the inner side of the splint (51) for facilitating the placement of the connecting ring (9).

2. The nozzle connecting ring welding fixture according to claim 1, characterized in that: The bottom of the splint (51) cooperates with the driven gear (56) via a rotating shaft penetrating the disc (50); a plurality of driven gears (56) are provided, and the exteriors of the plurality of driven gears (56) are meshed and connected with the gear ring (55); the gear ring (55) is fitted with a plurality of L-shaped frames (54) provided at the bottom of the disc (50).

3. The nozzle connecting ring welding fixture according to claim 1, characterized in that: The disc (50) is fixedly mounted on the support frame (20) via two symmetrically arranged second fixing plates (52); a second drive motor (53) is arranged between the two second fixing plates (52); a semicircular gear (57) is fixedly mounted on the output shaft of the second drive motor (53); and the semicircular gear (57) is meshed with the gear ring (55).

4. The nozzle connecting ring welding fixture according to claim 1, characterized in that: A movable plate (21) is provided between the electric push cylinder (3) and the support frame (20); and a connecting rod (22) is fixedly installed at the bottom of the movable plate (21); and one end of the connecting rod (22) away from the movable plate (21) is fixedly connected to the tooth plate (712).

5. The nozzle connecting ring welding fixture according to claim 1, characterized in that: The workbench (1) is also equipped with a loading rack (6); the loading rack (6) and the cavity formed when the placement seat (70) are in a vertical state are on the same axis.

6. The nozzle connecting ring welding fixture according to claim 1, characterized in that: A welding robot arm (8) is also installed on the workbench (1); wherein the welding robot arm (8) is located between the loading rack (6) and the compensation component (2).

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