Tool clamp positioning structure for welding fairing of ship propeller

Abstract

The invention relates to the technical field of ship manufacturing, and discloses a tool clamp positioning structure for ship propeller fairing welding, which comprises a bracket, a support rod connected to the bracket, a support ring connected to the tail end of the support rod, a rotating ring rotatably mounted in the support ring, and a bidirectional screw shaft rotatably mounted in the rotating ring, an inner supporting assembly is installed on the two-way lead screw shaft, a supporting base used for positioning a flow guide cover base is arranged on the support, a rotating arm used for positioning a special-shaped assembly on the flow guide cover is rotationally installed on the support, and a driving assembly used for driving the rotating ring to rotate is further installed on the support. The inner supporting assembly can form centering supporting on the fairing body, the driving gear and the driven gear are matched to drive the rotating ring to rotate, the whole fairing can be driven to rotate stably, all welding points can rotate to the position where an operator can work conveniently according to needs, the operator does not need to repeatedly move or adjust the posture of the fairing, and the working efficiency is improved. And the welding efficiency can be improved by firstly pre-welding the accessories and then butting the main body.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and more specifically, relates to a tooling fixture positioning structure for welding ship propeller fairings. Background Technology

[0002] As a crucial component of a ship's propulsion system, the structural integrity and installation precision of the propulsion fairing directly impact the propulsion efficiency and operational stability of the propulsion system. The welding quality of the fairing is a core element in ensuring these performance characteristics. The fairing typically consists of multiple components welded to the fairing body; the welding precision of each component directly determines the final assembly quality and performance of the fairing. Therefore, it is essential to ensure the correct welding positions between each component during the welding process.

[0003] However, the propeller fairing of a ship is large in size, and the operators need to move around the fairing repeatedly during welding. They need to frequently adjust the placement of the fairing for different welding points, which is labor-intensive and makes it difficult to guarantee positioning accuracy. For hidden or high welding points, temporary auxiliary platforms need to be built, which prolongs the operation time. At the same time, repeated movement and adjustment can easily cause the components to shift, affecting the stability of welding quality.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To address the challenges of large-volume propeller fairings in ship welding, requiring operators to repeatedly move around the fairing during welding and frequently adjust its orientation for different welding points—a labor-intensive process with difficulty in ensuring positioning accuracy—and the need for temporary auxiliary platforms for concealed or high-altitude welding points, which prolongs the work time, and the risk of component misalignment due to repeated movement and adjustments, thus affecting the stability of welding quality, the basic concept of the technical solution adopted in this invention is as follows: A tooling fixture positioning structure for welding a ship propeller fairing includes a bracket with a support rod connected to it. A support ring is connected to the end of the support rod. A rotating ring is rotatably mounted inside the support ring. A bidirectional lead screw shaft is rotatably mounted inside the rotating ring. An inner support assembly is mounted on the bidirectional lead screw shaft. The inner support assembly includes a support sleeve, a connecting rod, and a clamping block. A support seat for positioning the fairing base is provided on the bracket. A rotating arm for positioning irregularly shaped components on the fairing is rotatably mounted on the bracket. The bracket also has a drive assembly for driving the rotating ring to rotate. The drive assembly includes a driving gear and a driven gear.

[0006] In a preferred embodiment of the present invention, each connection of the bracket is connected with a reinforcing rib, the reinforcing rib is welded to the bracket, one end of the bracket is vertically connected to a support rod, and the end of the support rod is fixedly connected to a support ring.

[0007] In a preferred embodiment of the present invention, a support sleeve is rotatably mounted on the bidirectional lead screw shaft, and two connecting rods are connected between the support sleeve and the rotating ring. The two ends of the connecting rods are fixedly connected to the support sleeve and the rotating ring, respectively, and four telescopic sleeves are evenly distributed on the support sleeve.

[0008] In a preferred embodiment of the present invention, a telescopic rod is slidably installed inside each telescopic sleeve, and a tensioning block is connected to the end of the telescopic rod. Both ends of the bidirectional lead screw shaft are engaged with lead screw sleeves, and a connecting rod is connected between the lead screw sleeve and the tensioning block. Both ends of the connecting rod are rotatably connected to the lead screw sleeve and the tensioning block, respectively.

[0009] In a preferred embodiment of the present invention, the other end of the bracket is connected to a rotating shaft, and a rotating rod is rotatably mounted on the bracket via the rotating shaft. The end of the rotating rod is connected to a lower half support member, and an upper half support member is fitted on the lower half support member. The lower half support member and the upper half support member are detachably connected by bolts, and the bidirectional lead screw shaft passes through the mating area between the lower half support member and the upper half support member.

[0010] In a preferred embodiment of the present invention, a first slide rail and a second slide rail are respectively installed at both ends of the bracket, a crossbar is installed between the first slide rail and the second slide rail, and a slider is provided at both ends of the crossbar, the slider slidingly engaging with the first slide rail and the second slide rail respectively.

[0011] In a preferred embodiment of the present invention, a support base and a support arm are connected to the crossbar. The support base is provided with a positioning hole and a positioning groove. The positioning hole is adapted to the base of the flow guide, and the positioning groove is adapted to the lower irregular component of the flow guide.

[0012] In a preferred embodiment of the present invention, a first protective cover is connected to the side wall of the bracket. A driving gear, a driven gear, and a rotating plate are rotatably installed inside the first protective cover. One side of the rotating plate is connected to the driven gear, and a first motor is installed on the other side. The side of the driven gear away from the rotating plate is connected to one end face of a rotating ring. The driven gear meshes with the driving gear. A second motor is installed on the outer wall of the first protective cover. The output end of the first motor is connected to a bidirectional lead screw shaft, and the output end of the second motor is connected to the driving gear.

[0013] In a preferred embodiment of the present invention, the other end face of the rotating ring is connected to a mounting plate, a linear actuator and a second protective cover are mounted on the mounting plate, a rotating shaft is rotatably mounted inside the second protective cover, a pinion is mounted on the rotating shaft, and a rack that meshes with the pinion is also slidably mounted inside the second protective cover.

[0014] In a preferred embodiment of the present invention, a movable rod is fixedly connected to the end of the rack, the movable end of the linear actuator is connected to the movable rod, a rotating arm is connected to the rotating shaft, a plurality of positioning blocks are connected to the end of the rotating arm, a connector is installed in the positioning block, and the connector is adapted to the through hole of the irregular component on the guide shield.

[0015] Compared with the prior art, the present invention has the following advantages: In this invention, the internal support component can provide centering support for the body of the air guide. In conjunction with the active and driven gears, it drives the rotating ring to rotate, which can drive the entire air guide to rotate smoothly. This allows each welding point to be rotated to a position that is convenient for the operator to work in, eliminating the need for the operator to repeatedly move or adjust the air guide's posture. The design of pre-welding the accessories before connecting them to the main body and the dual-station synchronous welding structure not only avoid the problem of limited operating space caused by the large size of the air guide, but also improve welding convenience and work efficiency.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A schematic diagram of the tooling fixture positioning structure for welding a ship propeller fairing; Figure 2 A three-dimensional diagram of a tooling fixture positioning structure for welding a ship propeller fairing; Figure 3 A schematic diagram of the welding process between the base of the fairing and the lower irregular component, which is a tooling fixture positioning structure for welding a ship propeller fairing. Figure 4 A schematic diagram of the welding process of the fairing body, base and lower irregular component in a tooling fixture positioning structure for welding a ship propeller fairing. Figure 5 A rear view of the fairing body, base, and lower irregular component during welding of a tooling fixture positioning structure for welding a ship propeller fairing; Figure 6 A schematic diagram of the welding of an irregularly shaped component in a tooling fixture positioning structure for welding a ship propeller fairing; Figure 7 A schematic diagram of the connection of a drive assembly for a tooling fixture positioning structure used in welding a ship propeller fairing; Figure 8 A cross-sectional view of a tooling fixture positioning structure for welding a ship propeller fairing; Figure 9 A three-dimensional drawing of a tooling fixture positioning structure for welding a ship propeller fairing.

[0018] In the diagram: 1. Bracket; 100. Reinforcing rib; 101. Support rod; 102. Support ring; 2. Rotating ring; 3. Two-way lead screw shaft; 4. Support sleeve; 5. Connecting rod; 6. Telescopic sleeve; 7. Telescopic rod; 8. Tensioning block; 9. Lead screw sleeve; 10. Connecting rod; 11. Rotating shaft; 12. Rotating rod; 13. Lower half support component; 14. Upper half support component; 15. First slide rail; 16. Second slide rail; 161. Slider; 17. Crossbar; 18. Support base; 19. Positioning hole; 20. Positioning groove; 21. Support arm; 221. Driven gear; 222. Driven gear; 23. First motor; 24. Second motor; 25. Mounting plate; 26. Linear actuator; 27. Moving rod; 28. Rack; 29. ​​Pinion; 30. First protective cover; 301. Rotating plate; 31. Second protective cover; 32. Rotating shaft; 33. Rotating arm; 34. Positioning block; 35. Connecting piece; 36. Shield body; 37. Upper irregular component; 38. Lower irregular component; 39. Base; 40. Through hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] like Figures 1 to 9 As shown, a tooling fixture positioning structure for welding a ship propeller fairing includes a bracket 1 with a support rod 101 connected to it. A support ring 102 is connected to the end of the support rod 101. A rotating ring 2 is rotatably installed inside the support ring 102. A bidirectional lead screw shaft 3 is rotatably installed inside the rotating ring 2. An inner support assembly is installed on the bidirectional lead screw shaft 3. The inner support assembly includes a support sleeve 4, a connecting rod 5, and a tensioning block 8. A support seat 18 for positioning the fairing base 39 is provided on the bracket 1. A rotating arm 33 for positioning the irregular component 37 on the fairing is rotatably installed on the bracket 1. The bracket 1 is also equipped with a drive assembly for driving the rotating ring 2 to rotate. The drive assembly includes a drive gear 222 and a driven gear 221. In this setup, bracket 1 serves as the installation base for the entire tooling structure. Support rod 101 enables the rotating ring 2 to rotate via support ring 102, allowing the rotating ring 2 to drive the internal bidirectional lead screw shaft 3 and inner support assembly to rotate. The bidirectional lead screw shaft 3 provides the power transmission basis for the movement of the inner support assembly. Support sleeve 4 and connecting rod 5 cooperate to transmit the rotational force of the rotating ring 2 to the entire inner support assembly. The tensioning block 8 is used to directly contact the inner wall of the guide vane body 36 to achieve centering support. Support seat 18 and rotating arm 33 respectively position the base 39 of the guide vane and the upper irregular component 37. The drive assembly composed of active gear 222 and driven gear 221 provides power for the rotation of the rotating ring 2.

[0021] like Figures 1 to 9 As shown in the specific embodiment, each connection of the bracket 1 is connected to a reinforcing rib 100, which is welded to the bracket 1. A support rod 101 is vertically connected to one end of the bracket 1, and the end of the support rod 101 is fixedly connected to a support ring 102. In this configuration, the reinforcing rib 100 is welded to the connection of the bracket 1 to improve the structural strength and stability of the bracket 1. The support rod 101 vertically connected to one end of the bracket 1 is fixed to the support ring 102 as a whole, forming a rigid support from the bracket 1 to the support ring 102.

[0022] like Figures 1 to 9 As shown, a support sleeve 4 is rotatably mounted on the bidirectional lead screw shaft 3. Two connecting rods 5 connect the support sleeve 4 and the rotating ring 2. The two ends of the connecting rods 5 are fixedly connected to the support sleeve 4 and the rotating ring 2, respectively. Four telescopic sleeves 6 are evenly distributed on the support sleeve 4. In this configuration, the support sleeve 4 can remain relatively stationary when the bidirectional lead screw shaft 3 rotates. The two symmetrically connected connecting rods 5 fix the support sleeve 4 and the rotating ring 2, ensuring that when the rotating ring 2 rotates, it can drive the support sleeve 4 and subsequent components to rotate synchronously through the connecting rods 5. The telescopic sleeves 6 provide guidance for the installation of the telescopic rods 7.

[0023] like Figures 1 to 9 As shown, each telescopic sleeve 6 is further equipped with a telescopic rod 7, and the end of the telescopic rod 7 is connected to a support block 8. Both ends of the bidirectional lead screw shaft 3 are engaged with lead screw sleeves 9. A connecting rod 10 is connected between the lead screw sleeve 9 and the support block 8. Both ends of the connecting rod 10 are rotatably connected to the lead screw sleeve 9 and the support block 8, respectively. In this configuration, the telescopic rod 7 and the telescopic sleeve 6 are slidably engaged to provide stable guidance for the radial movement of the support block 8, ensuring that the support block 8 always moves in the radial direction of the guide shroud. When the bidirectional lead screw shaft 3 rotates, the lead screw sleeve 9 engaged at both ends will move axially along the bidirectional lead screw shaft 3. The lead screw sleeve 9 converts the axial force into a radial force that pushes the support block 8 through the connecting rod 10 that is rotatably connected at both ends. When the lead screw sleeve 9 moves toward the middle of the bidirectional lead screw shaft 3, the connecting rod 10 pushes the support block 8 to tighten toward the center. When the lead screw sleeve 9 moves toward both ends, the connecting rod 10 drives the support block 8 to expand outward, realizing the loosening and tightening action of the guide shroud body 36.

[0024] like Figures 1 to 9As shown, further, the other end of the bracket 1 is connected to a rotating shaft 11. A rotating rod 12 is rotatably mounted on the bracket 1 via the rotating shaft 11. The end of the rotating rod 12 is connected to a lower half support member 13. An upper half support member 14 is fitted onto the lower half support member 13. The lower half support member 13 and the upper half support member 14 are detachably connected by bolts. The bidirectional lead screw shaft 3 passes through the mating area between the lower half support member 13 and the upper half support member 14. In this configuration, the rotating shaft 11 provides a fulcrum for the rotating rod 12, allowing the rotating rod 12 to rotate around the rotating shaft 11 to adjust its angle. The lower half support member 13 and the upper half support member 14 at the end of the rotating rod 12 are detachably connected by bolts, forming a clamping support structure for the end of the bidirectional lead screw shaft 3. After the bidirectional lead screw shaft 3 passes through the mating area, it is secured by bolts to ensure that the lower half support member 13 and the upper half support member 14 provide stable support for the bidirectional lead screw shaft 3, preventing the bidirectional lead screw shaft 3 from shifting during rotation and under stress.

[0025] like Figures 1 to 9 As shown, furthermore, a first slide rail 15 and a second slide rail 16 are respectively installed at both ends of the bracket 1. A crossbar 17 is installed between the first slide rail 15 and the second slide rail 16. Slider blocks 161 are provided at both ends of the crossbar 17, and the sliders 161 slide in engagement with the first slide rail 15 and the second slide rail 16 respectively. In this configuration, the first slide rail 15 and the second slide rail 16 are installed parallel to each other at both ends of the bracket 1, providing guidance for the movement of the crossbar 17. The sliding engagement of the sliders 161 at both ends of the crossbar 17 with the slide rails allows the crossbar 17 to be adjusted in position along the slide rails.

[0026] like Figures 1 to 9 As shown, further, a support base 18 and a support arm 21 are connected to the crossbar 17. The support base 18 has a positioning hole 19 and a positioning groove 20. The positioning hole 19 is adapted to the base 39 of the shroud, and the positioning groove 20 is adapted to the lower irregular component 38 of the shroud. In this configuration, the support base 18 and the support arm 21 form a cooperative positioning structure. The positioning hole 19 on the support base 18 is adapted to the shape of the shroud base 39, which can quickly form axial positioning of the base 39. The positioning groove 20 matches the contour of the lower irregular component 38 on the base 39, which positions the lower irregular component 38. The support arm 21 also positions the lower irregular component 38.

[0027] like Figures 1 to 9As shown, further, a first protective cover 30 is connected to the side wall of the bracket 1. A driving gear 222, a driven gear 221, and a rotating plate 301 are rotatably installed inside the first protective cover 30. One side of the rotating plate 301 is connected to the driven gear 221, and a first motor 23 is installed on the other side. The side of the driven gear 221 away from the rotating plate 301 is connected to one end face of the rotating ring 2. The driven gear 221 meshes with the driving gear 222. A second motor 24 is installed on the outer wall of the first protective cover 30. The output end of the first motor 23 is connected to the bidirectional lead screw shaft 3, and the output end of the second motor 24 is connected to the driving gear 222. In this configuration, the first protective cover 30 provides a closed protective space for the internal drive gear 222, driven gear 221, and rotating plate 301. When the second motor 24 stops, the drive gear 222 limits the driven gear 221, and the rotating plate 301 is fixed accordingly, ensuring that the first motor 23 can stably output power to drive the bidirectional lead screw shaft 3 to rotate, thereby realizing the tensioning and tightening action of the inner support assembly. When the second motor 24 starts, its output end drives the drive gear 222 to rotate, and drives the driven gear 221 to rotate synchronously through gear meshing. The driven gear 221 drives the rotating plate 301 and the first motor 23 to rotate with itself, and drives the rotating ring 2 to rotate, thereby making the inner support assembly and the guide cover rotate synchronously as a whole. During this process, the relative position of the first motor 23 and the bidirectional lead screw shaft 3 remains unchanged, ensuring that the inner support assembly always maintains a stable tensioned state.

[0028] like Figures 1 to 9 As shown, further, a mounting plate 25 is connected to the other end face of the rotating ring 2. A linear actuator 26 and a second protective cover 31 are mounted on the mounting plate 25. A rotating shaft 32 is rotatably mounted inside the second protective cover 31, and a pinion 29 is mounted on the rotating shaft 32. A rack 28 that meshes with the pinion 29 is also slidably mounted inside the second protective cover 31. In this configuration, the mounting plate 25 on the other end face of the rotating ring 2 provides a mounting carrier for the linear actuator 26 and the second protective cover 31. The second protective cover 31 protects the internal pinion 29, rack 28, and rotating shaft 32. The linear actuator 26 can be an electric push rod, hydraulic cylinder, or other components. The linear actuator 26 can provide stable linear driving force. By driving the rack 28 to slide inside the second protective cover 31, it drives the pinion 29 that meshes with it to rotate. The pinion 29 is mounted on the rotating shaft 32, thereby converting the linear motion into the rotational motion of the rotating shaft 32, providing power for the angle adjustment of the rotating arm 33, thereby moving the irregular component 37 on the guide shield.

[0029] like Figures 1 to 9As shown, further, a moving rod 27 is fixedly connected to the end of the rack 28, and the moving end of the linear actuator 26 is connected to the moving rod 27. A rotating arm 33 is connected to the rotating shaft 32, and multiple positioning blocks 34 are connected to the end of the rotating arm 33. A connector 35 is installed inside the positioning block 34, and the connector 35 is adapted to the through hole 40 of the irregular component 37 on the guide shroud. In this configuration, the moving end of the linear actuator 26 stably pushes the rack 28 to slide through the moving rod 27. When the rotating shaft 32 rotates, it drives the rotating arm 33 to rotate synchronously, realizing the angle adjustment of the positioning block 34 at the end of the rotating arm 33. The multiple positioning blocks 34 are adapted to the shape of the irregular component 37 on the guide shroud, and can form stable support for the irregular component 37 from multiple points. The connector 35 inside the positioning block 34 is adapted to the through hole 40 of the irregular component 37. Through the cooperation of the connector 35 passing through the through hole 40, the irregular component 37 can be positioned on the positioning block 34.

[0030] The implementation principle of the tooling fixture positioning structure for welding a ship propeller fairing in this embodiment is as follows: When using this tooling fixture positioning structure, the initial positioning of the fairing base 39 and the lower irregular component 38 is first completed. The base 39 is placed into the positioning hole 19 of the support pedestal 18, and the lower irregular component 38 is engaged in the positioning groove 20, thus completing the initial fixation of both. The reinforcing rib 100 welded at the connection of the bracket 1 can effectively distribute the force and prevent the bracket 1 from deforming under load.

[0031] After initial positioning, the first motor 23 is started. During this process, the first motor 23 is mounted on the rotating plate 301. At this time, the second motor 24 is in a stopped state. The driving gear 222 connected to its output end is engaged with the driven gear 221. Under the limiting action of the driving gear 222, the driven gear 221 cannot rotate, thereby keeping the rotating plate 301 and the first motor 23 mounted on it fixed, ensuring that the first motor 23 can output power stably. When the first motor 23 drives the bidirectional lead screw shaft 3 to rotate, since the support sleeve 4 is connected to the rotating ring 2 through the connecting rod 5, the support sleeve 4 cannot rotate synchronously with the bidirectional lead screw shaft 3. As a result, the lead screw sleeves 9 engaged at both ends of the bidirectional lead screw shaft 3 can only move towards both ends along the axial direction of the bidirectional lead screw shaft 3. When the lead screw sleeves 9 move towards both ends, the connecting rod 10 connected to both ends pulls the tension block 8. The tension block 8 slides with the telescopic sleeve 6 on the support sleeve 4 through the telescopic rod 7. The telescopic rod 7 is guided and limited in the telescopic sleeve 6, and finally drives the tension block 8 to tighten towards the center. This action not only reserves installation space for the subsequent fairing body 36, but also provides ample operating space for welding the base 39 and the lower irregular component 38.

[0032] Once the tensioning block 8 is tightened into place, the dual-station synchronous operation can be started. One operator directly pre-welds the base 39 and the lower irregular component 38, while another welder is added. The linear actuator 26 is started synchronously. The moving end of the linear actuator 26 extends and pushes the moving rod 27. The moving rod 27 then drives the rack 28 to slide in a straight line inside the second protective cover 31. The linear motion of the rack 28 is converted into the rotational motion of the pinion 29, which drives the rotating shaft 32 to rotate synchronously inside the second protective cover 31. When the rotating shaft 32 rotates, it directly drives the rotating arm 33 to rotate around the axis of the rotating shaft 32. The positioning block 34 at the end of the rotating arm 33 is adjusted to the horizontal receiving position. At this time, the upper irregular component 37 can be placed on the positioning block 34. After the connector 35 passes through the through hole 40 of the upper irregular component 37 and is fixed, the upper irregular component 37 is welded. The dual-station synchronous operation improves welding efficiency.

[0033] After the pre-welding work of the base 39 with the lower irregular component 38 and the upper irregular component 37 is completed, space needs to be made for the installation of the fairing body 36. First, loosen the connecting bolts between the upper half support 14 and the lower half support 13, remove the upper half support 14, and then rotate the rotating rod 12 around the rotating shaft 11 so that the rotating rod 12 drives the lower half support 13 to move outward, ensuring that the fairing body 36 can be smoothly fitted into the inner support component. Then, use a crane to lift the fairing body 36 to one side of the inner support component, so that the tightened inner support component passes through the hollow area in the middle of the fairing body 36 to complete the fitting.

[0034] After the sleeve is installed, the first motor 23 is started in reverse to drive the bidirectional lead screw shaft 3 to rotate in the opposite direction. The lead screw sleeve 9 moves towards the center along the bidirectional lead screw shaft 3, pushing the support block 8 outward through the connecting rod 10 until the support block 8 is tightly fitted with the inner wall of the guide fairing body 36. The four evenly distributed support blocks 8 achieve automatic centering and stable support of the guide fairing body 36. Then, the rotating rod 12 is rotated in reverse to reset the lower half support member 13. The upper half support member 14 is then covered and tightened with bolts. The upper half support member 14 and the lower half support member 13 cooperate to form stable support for the end of the bidirectional lead screw shaft 3.

[0035] After the main body 36 of the fairing is fixed, the linear actuator 26 is activated again. Its moving end retracts and pulls the moving rod 27, causing the rack 28 to slide in the opposite direction. Through the meshing transmission between the rack 28 and the pinion 29, the rotating shaft 32 rotates in the opposite direction, thereby driving the rotating arm 33 to swing in the opposite direction around the rotating shaft 32. The pre-welded upper irregular component 37 is precisely fastened to the corresponding connection position of the main body 36 of the fairing. At the same time, the lower irregular component 38, which has been welded to the base 39, is also aligned with the main body. Thus, the docking and positioning of all pre-welded parts with the main body is completed, and the final docking and welding operation is awaited.

[0036] To address the issue of some points being difficult to reach during butt welding, the entire flow guide can be rotated simply by activating the second motor 24. The second motor 24 is fixedly installed on the outer wall of the first protective cover 30, and its output drives the drive gear 222 to rotate. The drive gear 222 meshes with the driven gear 221, causing the driven gear 221 to rotate synchronously. The driven gear 221 drives the first motor 23 to rotate synchronously with the rotating plate 301 through the rotating plate 301, and also drives the rotating ring 2 to rotate around the central axis of the support ring 102. The rotating ring 2 drives the support sleeve 4, the bidirectional lead screw shaft 3, and the inner support assembly to rotate as a whole through the connecting rod 5, ultimately achieving the synchronous rotation of the entire flow guide supported by the inner support assembly.

[0037] During rotation, the first motor 23, rotating plate 301, driven gear 221, and rotating ring 2 are linked, ensuring that the relative position of the first motor 23 and the bidirectional lead screw shaft 3 remains unchanged, thus guaranteeing the stable tension of the inner support assembly. Operators do not need to repeatedly move around the large guide shield or build auxiliary platforms; they can complete all welding points from a fixed position, reducing labor intensity and ensuring consistent welding quality. After welding, the bolts of the connecting piece 35, upper support piece 14, and lower support piece 13 are loosened sequentially. The first motor 23 is then started to tighten the inner support assembly, and the finished guide shield is removed using a crane, completing the entire operation.

Claims

1. A tooling fixture positioning structure for welding a ship propeller fairing, comprising a bracket (1) characterized in that, The bracket (1) is connected to a support rod (101), and the end of the support rod (101) is connected to a support ring (102). A rotating ring (2) is rotatably installed inside the support ring (102), and a bidirectional lead screw shaft (3) is rotatably installed inside the rotating ring (2). An inner support assembly is installed on the bidirectional lead screw shaft (3). The inner support assembly includes a support sleeve (4), a connecting rod (5), and a tensioning block (8). The bracket (1) is provided with a support seat (18) for positioning the base (39) of the flow guide. The bracket (1) is rotatably installed with a rotating arm (33) for positioning the irregular component (37) on the flow guide. The bracket (1) is also equipped with a drive assembly for driving the rotating ring (2) to rotate. The drive assembly includes a driving gear (222) and a driven gear (221).

2. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, The bracket (1) is connected to a reinforcing rib (100) at each connection point. The reinforcing rib (100) is welded to the bracket (1). One end of the bracket (1) is vertically connected to a support rod (101). The end of the support rod (101) is fixedly connected to a support ring (102).

3. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, A support sleeve (4) is rotatably mounted on the bidirectional lead screw shaft (3). Two connecting rods (5) are connected between the support sleeve (4) and the rotating ring (2). The two ends of the connecting rods (5) are fixedly connected to the support sleeve (4) and the rotating ring (2) respectively. Four telescopic sleeves (6) are evenly distributed on the support sleeve (4).

4. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 3, characterized in that, Each of the telescopic sleeves (6) is slidably installed with a telescopic rod (7), and the end of the telescopic rod (7) is connected to a support block (8). Both ends of the bidirectional lead screw shaft (3) are engaged with lead screw sleeves (9). A connecting rod (10) is connected between the lead screw sleeve (9) and the support block (8). Both ends of the connecting rod (10) are rotatably connected to the lead screw sleeve (9) and the support block (8) respectively.

5. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, The other end of the bracket (1) is connected to a rotating shaft (11). The bracket (1) is rotatably mounted with a rotating rod (12) via the rotating shaft (11). The end of the rotating rod (12) is connected to a lower half support member (13). An upper half support member (14) is fitted on the lower half support member (13). The lower half support member (13) and the upper half support member (14) are detachably connected by bolts. The bidirectional lead screw shaft (3) passes through the mating area between the lower half support member (13) and the upper half support member (14).

6. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, The bracket (1) is equipped with a first slide rail (15) and a second slide rail (16) at both ends. A crossbar (17) is installed between the first slide rail (15) and the second slide rail (16). A slider (161) is provided at both ends of the crossbar (17). The slider (161) slides in cooperation with the first slide rail (15) and the second slide rail (16) respectively.

7. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 6, characterized in that, The crossbar (17) is connected to a support base (18) and a support arm (21). The support base (18) is provided with a positioning hole (19) and a positioning groove (20). The positioning hole (19) is adapted to the base (39) of the shroud, and the positioning groove (20) is adapted to the lower irregular component (38) of the shroud.

8. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, The side wall of the bracket (1) is connected to a first protective cover (30). Inside the first protective cover (30), a driving gear (222), a driven gear (221), and a rotating plate (301) are rotatably installed. One side of the rotating plate (301) is connected to the driven gear (221), and the other side is equipped with a first motor (23). The side of the driven gear (221) away from the rotating plate (301) is connected to one end face of the rotating ring (2). The driven gear (221) meshes with the driving gear (222). The outer wall of the first protective cover (30) is equipped with a second motor (24). The output end of the first motor (23) is connected to the bidirectional lead screw shaft (3), and the output end of the second motor (24) is connected to the driving gear (222).

9. The tooling fixture positioning structure for welding a ship propeller fairing according to claim 1, characterized in that, The other end face of the rotating ring (2) is connected to a mounting plate (25). A linear actuator (26) and a second protective cover (31) are mounted on the mounting plate (25). A rotating shaft (32) is rotatably mounted inside the second protective cover (31). A pinion (29) is mounted on the rotating shaft (32). A rack (28) that meshes with the pinion (29) is also slidably mounted inside the second protective cover (31).

10. A tooling fixture positioning structure for welding a ship propeller fairing according to claim 9, characterized in that, The rack (28) is fixedly connected to a moving rod (27), the moving end of the linear actuator (26) is connected to the moving rod (27), the rotating shaft (32) is connected to a rotating arm (33), the rotating arm (33) is connected to a plurality of positioning blocks (34), the positioning block (34) is installed with a connector (35), and the connector (35) is adapted to the through hole (40) of the irregular component (37) on the flow guide.

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