A welding positioning device for gas turbine production

Abstract

The utility model discloses a kind of welding positioning devices for gas turbine production, it is related to gas turbine production welding equipment technical field, including fixed seat, the upper end of fixed seat is rotatably connected with rotary drive seat, degree limiting component is arranged between the two;The upper wall one end of rotary drive seat is fixedly installed with hinged seat, the upper end of hinged seat is hinged with welding platform, the lower wall of welding platform is fixedly installed with guide block away from the one end of hinged seat, the side of guide block towards hinged seat is provided with guide inclined surface;The side wall of fixed seat corresponding welding platform dips side is provided with heavy-load anti-overturning support component, the utility model has horizontal full rotation and pitch angle adjustment double degrees of freedom, can adjust any weld of gas turbine special-shaped component to optimal welding station;Conical pin type degree limiting component realizes the mechanical locking of commonly used angle, improves positioning accuracy through taper surface cooperation to ensure weld splicing consistency.

Description

Technical Field

[0001] This utility model relates to the technical field of welding equipment for gas turbine production, specifically a welding positioning device for gas turbine production. Background Technology

[0002] The core components of a gas turbine, such as the casing, combustion chamber, and blade support, are mostly irregularly shaped, heavy-duty, and eccentric structures. During assembly and welding, frequent adjustments to the workpiece's posture are necessary to position the weld seam at optimal welding positions, such as flat welding or sculpted welding, to ensure weld quality. Existing gas turbine welding positioning devices generally suffer from the following technical defects: 1. Most welding rotary tables rely solely on the self-locking mechanism of the drive motor or worm gear. When welding is subjected to lateral forces or vibrations, they are prone to rotational movement, making it impossible to achieve precise indexing and positioning of commonly used welding angles.

[0003] 2. For heavy eccentric workpieces, the equipment is prone to tipping over when the platform tilts or the center of gravity of the workpiece deviates from the support range; the existing external fixed support feet have a fixed height, which cannot adapt to uneven workshop ground and equipment installation height difference, and cannot be quickly stored, resulting in insufficient convenience of use and support stability.

[0004] 3. Some positioners with tilt adjustment use hydraulic cylinder direct drive, which poses a risk of hydraulic leakage and causes large impact during start-up and shutdown; while the structure using lead screw direct drive is subject to large radial force, the transmission pair is prone to wear, and the positioning accuracy decays rapidly under heavy load. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a welding positioning device for gas turbine production, which solves the technical problems of existing devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A welding positioning device for gas turbine production includes a fixed base, a rotary drive base rotatably connected to the upper end of the fixed base, and an indexing limit assembly between the two. A hinged seat is fixedly installed at one end of the upper wall of the rotary drive base, and a welding platform is hinged to the upper end of the hinged seat. A guide block is fixedly installed at the lower end of the welding platform away from the hinged seat, and a guide inclined surface is provided on the side of the guide block facing the hinged seat. A heavy-duty anti-overturning support assembly is provided on the side wall of the fixed base corresponding to the tilting side of the welding platform. A sliding drive base is slidably connected to the upper wall of the rotary drive base, and a drive roller is rotatably connected to the upper end of the sliding drive base. The drive roller is roll-fitted with the guide inclined surface. A screw drive assembly is provided inside the rotary drive base, which can drive the sliding drive base to move horizontally. The tilt angle of the welding platform is adjusted by lifting the guide block through the drive roller. An elastic telescopic rod is hinged between the welding platform and the rotary drive base, which can pull the welding platform back to its original position, so that the guide inclined surface is always in close contact with the drive roller.

[0007] Preferably, a stepped mounting groove is provided at the center of the bottom wall of the fixed base. A rotary drive motor is fixedly installed at the small hole end of the stepped mounting groove. A bevel gear set is provided between the output end of the rotary drive motor and the center of the lower wall of the rotary drive base, which drives the rotary drive base to rotate horizontally through meshing transmission. A drive screw is rotatably installed inside the rotary drive base through a screw adapter frame. The drive screw is located below the guide block. A conductive slip ring is fixedly installed at the large hole end of the stepped mounting groove. The conductive slip ring is connected to the fixed base and the rotary drive base respectively, providing a stable power supply to the drive end of the drive screw in the rotation state.

[0008] Preferably, a drive sleeve is screwed onto the drive screw, and the upper end of the drive sleeve is fixedly connected to the lower wall of the sliding drive seat through a guide connecting plate; a sliding guide rail is fixedly installed on the inner bottom wall of the rotary drive seat, and the lower end of the guide connecting plate is slidably adapted to the sliding guide rail; the two ends of the drive sleeve are sealed to the screw adapter frame through a bellows dust cover.

[0009] Preferably, a support rod is also fixedly installed on the upper wall of the rotary drive seat. When the drive roller retracts to the minimum stroke, the elastic telescopic rod pulls the welding platform back down and abuts against the support rod to maintain a horizontal working position.

[0010] Preferably, the drive roller has a limiting annular groove on its circumferential surface, which engages with both sides of the guide block to limit their lateral relative displacement.

[0011] Preferably, the indexing and limiting component includes a plurality of positioning pin holes, evenly distributed along the circumferential direction of the lower wall of the rotary drive seat; the upper wall of the fixed seat is provided with a guide pin hole coaxially corresponding to the positioning pin holes, and the outer side wall of the fixed seat is provided with a drive guide groove communicating with the guide pin holes; a limiting cone pin is slidably connected in the guide pin hole, the limiting cone pin is elastically pressed against the bottom wall of the guide pin hole, and the upper end can be inserted into the positioning pin hole; a lever is fixedly installed on the side wall of the limiting cone pin, and the lever protrudes out of the drive guide groove.

[0012] Preferably, the heavy-duty anti-overturning support assembly includes a connecting shaft, which is horizontally rotatably connected to the side wall of the fixed base; a support screw is vertically fixed to the outer end of the connecting shaft, and a support sleeve is screwed onto the support screw. A stepped guide groove is formed axially inside the support sleeve; a support seat is slidably connected in the stepped guide groove, and a return spring is fixedly connected between the support seat and the bottom wall of the stepped guide groove; a storage plate is fixedly installed at a corresponding position on the side wall of the fixed base. In the stored state, the support screw is horizontally attached to the side wall of the fixed base, and the support seat and the storage plate fit together properly; rotating the support sleeve can adjust the overall support height along the axial direction of the support screw.

[0013] This utility model provides a welding positioning device for gas turbine production, which has the following advantages: 1. This utility model has dual degrees of freedom for horizontal full rotation and pitch angle adjustment, which can adjust any weld of the gas turbine irregular component to the optimal welding position; the conical pin indexing limit component realizes mechanical locking of commonly used angles, and improves positioning accuracy through conical surface cooperation to ensure the consistency of weld splicing.

[0014] 2. This utility model features a foldable elastic support foot that fits against the side wall of the equipment when stored, with no protruding structure and no space occupation. When unfolded, the support screw sleeve can be rotated to adjust the overall support height, adapting to large ground height differences and equipment installation deviations. The support seat with built-in springs can adapt to slightly uneven ground, forming rigid support through ground friction, effectively avoiding the risk of equipment tipping over when welding heavy eccentric workpieces. It is easy to operate and provides stable support.

[0015] 3. This utility model adopts the wedge transmission principle of rolling and lifting the drive roller along the guide slope, which converts the horizontal driving force into the vertical lifting force. The force amplification effect is significant, the transmission process is smooth and impact-free, the load-bearing capacity is strong, it can be adapted to the attitude adjustment of heavy-duty components of gas turbines, and the rolling friction loss is small, resulting in a long service life of the equipment. The articulated elastic telescopic rod provides a continuous pull-back force to ensure that the drive roller and the guide slope are always in close contact, eliminating transmission gaps. With the support stop bar limiting the horizontal reference position, there is no rigid impact when falling back, and the platform reference accuracy is stable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall unfolded structure of this utility model; Figure 2 This is a schematic diagram of the unfolded cross-sectional structure of this utility model; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the storage structure of this utility model; Figure 5 This is a schematic diagram of the connection structure between the guide block and the drive roller of this utility model; Figure 6 This is a schematic diagram of the heavy-duty anti-overturning support component of this utility model.

[0017] In the diagram: 1. Fixed seat; 2. Rotary drive seat; 3. Hinge seat; 4. Welding platform; 5. Guide block; 6. Guide inclined surface; 7. Sliding drive seat; 8. Drive roller; 9. Elastic telescopic rod; 10. Stepped mounting groove; 11. Rotary drive motor; 12. Bevel gear set; 13. Screw adapter frame; 14. Drive screw; 15. Conductive slip ring; 16. Drive screw sleeve; 17. Guide connecting plate; 18. Sliding guide rail; 19. Bellows dust cover; 20. Support stop bar; 21. Limiting ring groove; 22. Positioning pin hole; 23. Guide pin hole; 24. Drive guide groove; 25. Limiting cone pin; 26. Baffle; 27. Connecting shaft; 28. Support screw; 29. ​​Support screw sleeve; 30. Stepped guide groove; 31. Support seat; 32. Return spring; 33. Storage plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] like Figure 1-6 As shown, this utility model discloses a welding positioning device for gas turbine production, including a fixed base 1. A rotary drive base 2 is rotatably connected to the upper end of the fixed base 1 via a rotary support. A dividing limit assembly is provided between the fixed base 1 and the rotary drive base 2 for mechanical locking of the rotation angle. A hinged base 3 is fixedly installed on the left end of the upper wall of the rotary drive base 2. The upper end of the hinged base 3 is hinged to the left end of the welding platform 4 via a hinge shaft, forming a fulcrum for the pitching and swinging of the welding platform. A guide block 5 is fixedly installed on the right end of the lower wall of the welding platform 4. The left side wall of the guide block 5 is provided with a guide inclined surface 6 that slopes downwards from left to right. A heavy-duty anti-tipping support assembly is provided on the side wall of the fixed base 1 corresponding to the tilting side of the welding platform for lateral support and anti-tipping during welding of heavy workpieces.

[0020] A sliding drive seat 7 is slidably connected to the upper wall of the rotary drive seat 2 in the left-right direction. A drive roller 8 is rotatably connected to the upper end of the sliding drive seat 7 via a rotating shaft. The circumferential surface of the drive roller 8 rolls in contact with the guide inclined surface 6. A lead screw drive assembly is installed inside the rotary drive seat 2, which can drive the sliding drive seat 7 to move horizontally in the left-right direction. The drive roller 8 rolls and lifts along the guide inclined surface 6, pushing the welding platform 4 to swing upwards around the hinge seat 3, achieving precise adjustment of the pitch angle. An elastic telescopic rod 9 is hinged between the lower wall of the welding platform 4 and the upper wall of the rotary drive seat 2, always providing a downward pull force to the welding platform 4, ensuring that the guide inclined surface 6 and the drive roller 8 are in close contact throughout the entire process, eliminating transmission gaps.

[0021] A stepped mounting groove 10 is formed at the center of the bottom wall of the fixed base 1. A rotary drive motor 11 is fixedly mounted at the small hole end of the stepped mounting groove 10. The output end of the rotary drive motor 11 extends upward and a bevel gear set 12 is provided between it and the center of the lower wall of the rotary drive base 2. The rotary drive base 2 is driven to rotate horizontally through the meshing transmission of the bevel gears. Inside the rotary drive base 2, a drive screw 14 is rotatably mounted via a screw adapter 13. The drive screw 14 is located directly below the guide block 5. A conductive slip ring 15 is fixedly mounted at the large hole end of the stepped mounting groove 10. The stator end of the conductive slip ring 15 is connected to the fixed base 1, and the rotor end is connected to the rotary drive base 2. This provides a stable power supply to the drive end of the drive screw 14 during rotation, preventing wire entanglement during rotation.

[0022] A drive sleeve 16 is screwed onto the drive screw 14. A guide connecting plate 17 is fixedly connected to the upper end of the drive sleeve 16. The guide connecting plate 17 extends upward through the top surface of the rotary drive seat 2, and its upper end is fixedly connected to the lower wall of the sliding drive seat 7. A sliding guide rail 18 is fixedly installed on the inner bottom wall of the rotary drive seat 2 in the left-right direction. The lower end of the guide connecting plate 17 is slidably adapted to the sliding guide rail 18, providing precise guidance and constraint for the horizontal translation of the sliding drive seat 7 and preventing movement deviation. The left and right ends of the drive sleeve 16 are sealed to the screw adapter 13 through a bellows dust cover 19, forming a full-stroke sealed protection for the transmission pair of the drive screw 14 and preventing thread jamming and wear.

[0023] A support rod 20 is also fixedly installed on the right end of the upper wall of the rotary drive base 2. When the drive roller 8 retracts to the rightmost minimum stroke, the elastic telescopic rod 9 pulls the welding platform 4 back smoothly, finally abutting against the top surface of the support rod 20, maintaining the horizontal reference position and avoiding excessive reset. A limiting annular groove 21 is opened on the circumferential surface of the drive roller 8. The limiting annular groove 21 engages with the front and rear sides of the guide block 5, limiting the lateral relative displacement between the drive roller 8 and the guide block 5, preventing lateral derailment during rolling lifting, and improving the operational stability of angle adjustment.

[0024] The indexing and limiting assembly includes several positioning pin holes 22, evenly distributed along the circumferential direction of the lower wall of the rotary drive seat 2, with the spacing between adjacent pin holes corresponding to commonly used welding indexing angles. The upper wall of the fixed seat 1 has guide pin holes 23 coaxially corresponding to the positioning pin holes 22, and the outer wall of the fixed seat 1 has a drive guide groove 24 communicating with the guide pin holes 23. A limiting cone pin 25 is slidably connected within the guide pin hole 23, elastically abutting against the bottom wall of the guide pin hole 23, with its upper conical surface able to be inserted into the positioning pin hole 22 to achieve rotational locking. A lever 26 is fixedly installed on the side wall of the limiting cone pin 25, extending outwards through the drive guide groove 24. Moving the lever 26 downwards will cause the limiting cone pin 25 to retract, releasing the rotational locking.

[0025] The heavy-duty anti-tipping support assembly includes a connecting shaft 27, which is horizontally rotatably connected to the side wall of the fixed base 1. A support screw 28 is vertically fixed to the outer end of the connecting shaft 27. The outer wall of the support screw 28 is provided with external threads. A support sleeve 29 is screwed onto the support screw 28. Rotating the support sleeve 29 allows it to move axially along the support screw 28. A stepped guide groove 30 is axially formed inside the support sleeve 29. A support base 31 is slidably connected within the stepped guide groove 30. A return spring 32 is fixedly connected between the support base 31 and the bottom wall of the stepped guide groove 30. In its natural state, the return spring 32 pushes the support base 31 to extend outward, allowing it to float and adaptively conform to the bottom surface of the platform.

[0026] A storage plate 33 is fixedly installed on the side wall of the fixed base 1 at the corresponding position. In the stored state, the support screw 28 flips downward and rests horizontally against the side wall of the fixed base. The end of the support base 31 is inserted into the storage plate 33 to achieve a limit. When unfolded, the support base 31 is pressed to compress the return spring 32, causing it to disengage from the storage plate 33. It then rotates 90° upward around the connecting shaft 27 to a vertical state. The support screw sleeve 29 is rotated upward and screwed out, causing the support base 31 to press against the lower wall of the gas turbine component after the flip angle. The downward pressure of the platform is transmitted to the fixed base through the support screw sleeve, support screw, and connecting shaft, forming a rigid support arm to limit the platform's tilting and overturning.

[0027] In actual implementation, the elastic telescopic rod 9 can be any of the existing technologies, and the top of the support base 31 can be any wear-resistant rubber pad structure that can be implemented in the existing technologies to avoid rigidly damaging the surface of the workpiece; the elastic clamping structure at the bottom of the limiting cone pin 25 can be implemented using a common compression spring in the existing technologies. All of the above are conventional and well-known structures in the field, and will not be elaborated here.

[0028] Specifically: After the gas turbine components are fixed using any of the existing technologies, if it is necessary to adjust the circumferential welding position, the lever 26 is pulled down, causing the limiting cone pin 25 to retract and disengage from the positioning pin hole 22, thus releasing the rotation lock. The rotation drive motor 11 is started, which drives the rotation drive seat 2 to rotate horizontally through the bevel gear set 12. The welding platform 4 rotates synchronously with the workpiece, adjusting the target weld to the corresponding angle. After reaching the target angle, the lever 26 is released, and the limiting cone pin 25 pops up under the action of elasticity and inserts into the corresponding positioning pin hole 22, completing the mechanical locking. During the rotation, the conductive slip ring 15 provides a continuous and stable power supply, and the wiring is not tangled, enabling continuous full-circumferential rotation.

[0029] When the pitch welding angle needs to be adjusted, start the drive end of the drive screw 14, which drives the drive screw sleeve 16 to move along the sliding guide rail 18. The sliding drive seat 7 moves synchronously, and the drive roller 8 rolls along the guide inclined surface 6, gradually lifting the guide block 5 and pushing the welding platform 4 to tilt upward around the hinge seat 3. The elastic telescopic rod 9 is stretched and stores energy synchronously. After adjusting to the target angle, stop driving the lead screw 14. Relying on the self-locking characteristic of the lead screw and the reverse tension of the elastic telescopic rod, the angle remains stable with no transmission backlash. Under heavy-load tilting conditions, the lower anti-overturning support continuously provides top support force to ensure the stability of the platform's posture. First, deploy the heavy-load anti-overturning support: press the support seat 31 inward, compress the return spring 32 to make the support seat 31 retract and disengage from the storage plate 33, and rotate the support screw 28 together with the support sleeve 29 upward 90° around the connecting shaft 27 to a vertical state. Then, release the support seat 31, and the return spring 32 pushes the support seat 31 to the ground, restricting the degree of freedom of steering. Then, rotate the support sleeve 29 upward along the support screw 28 until the support sleeve 29 tightly presses against the lower wall of the gas turbine mechanism component, completing the auxiliary support.

[0030] After the welding operation is completed, the reverse drive screw 14 drives the drive sleeve 16 to move horizontally to the right, and the drive roller 8 moves to the right simultaneously; the elastic telescopic rod 9 gradually releases its elastic force, pulling the welding platform 4 back down smoothly, and the guide inclined surface 6 always keeps close to the drive roller 8, without any impact during the fall. When the welding platform 4 falls back to the horizontal position, its bottom abuts against the support stop 20, completing the pitch reset.

[0031] Then, the support sleeve 29 is rotated in the opposite direction to fall back, the support seat 31 is pressed to retract, and the support screw is rotated downwards by 90° so that the support seat 31 is engaged with the receiving plate 33 to complete the support and storage. The workpiece can then be unloaded and the next processing cycle can begin. Throughout the process, the accordion dust cover 19 extends and retracts synchronously with the drive sleeve, always maintaining the sealed state of the transmission cavity, effectively isolating welding slag and debris, and protecting the transmission pair.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding positioning device for gas turbine manufacturing, characterized in that, Includes a fixed base (1), the upper end of which is rotatably connected to a rotary drive base (2), and an indexing limit assembly is provided between the two; a hinge base (3) is fixedly installed on one end of the upper wall of the rotary drive base (2), and a welding platform (4) is hinged to the upper end of the hinge base (3); a guide block (5) is fixedly installed on the lower wall of the welding platform (4) away from the hinge base (3), and a guide inclined surface (6) is provided on the side of the guide block (5) facing the hinge base (3); a heavy-duty anti-overturning support assembly is provided on the side wall of the fixed base (1) corresponding to the tilting side of the welding platform. The upper wall of the rotary drive seat (2) is slidably connected to the sliding drive seat (7), and the upper end of the sliding drive seat (7) is rotatably connected to the drive roller (8). The drive roller (8) is rolled and adapted to the guide inclined surface (6). The rotary drive seat (2) is provided with a screw drive assembly, which can drive the sliding drive seat (7) to move horizontally. The pitch angle of the welding platform (4) is adjusted by lifting the guide block (5) through the drive roller (8). The welding platform (4) is hinged to the rotary drive seat (2) by an elastic telescopic rod (9), which can pull the welding platform (4) back to reset, so that the guide inclined surface (6) is always in close contact with the drive roller (8).

2. The welding positioning device for gas turbine production according to claim 1, characterized in that, The bottom wall of the fixed base (1) is provided with a stepped mounting groove (10), and a rotary drive motor (11) is fixedly installed at the small hole end of the stepped mounting groove (10). A bevel gear set (12) is provided between the output end of the rotary drive motor (11) and the center of the lower wall of the rotary drive base (2), which drives the rotary drive base (2) to rotate horizontally through meshing transmission. The drive screw (14) is rotatably mounted inside the rotary drive seat (2) via a screw adapter frame (13). The drive screw (14) is located below the guide block (5). A conductive slip ring (15) is fixedly mounted on the large hole end of the stepped mounting groove (10). The conductive slip ring (15) is connected to the fixed seat (1) and the rotary drive seat (2) respectively, providing a stable power supply to the drive end of the drive screw (14) in the rotary state.

3. The welding positioning device for gas turbine production according to claim 2, characterized in that, A drive screw sleeve (16) is screwed onto the drive screw (14), and the upper end of the drive screw sleeve (16) is fixedly connected to the lower wall of the sliding drive seat (7) through the guide connecting plate (17); a sliding guide rail (18) is fixedly installed on the inner bottom wall of the rotary drive seat (2), and the lower end of the guide connecting plate (17) is slidably adapted to the sliding guide rail (18). The two ends of the drive screw sleeve (16) are sealed to the lead screw adapter (13) by a bellows dust cover (19).

4. The welding positioning device for gas turbine production according to claim 1, characterized in that, The upper wall of the rotary drive seat (2) is also fixedly equipped with a support rod (20). When the drive roller (8) retracts to the minimum stroke, the elastic telescopic rod (9) pulls the welding platform (4) back and abuts against the support rod (20) to maintain a horizontal position.

5. The welding positioning device for gas turbine production according to claim 1, characterized in that, The drive roller (8) has a limiting groove (21) on its circumferential surface. The limiting groove (21) engages with both sides of the guide block (5) to limit the lateral relative displacement between the two.

6. The welding positioning device for gas turbine production according to claim 1, characterized in that, The indexing and limiting component includes several positioning pin holes (22), which are evenly distributed along the circumferential direction of the lower wall of the rotary drive seat (2); the upper wall of the fixed seat (1) is provided with a guide pin hole (23) coaxial with the positioning pin hole (22), and the outer side wall of the fixed seat (1) is provided with a drive guide groove (24) communicating with the guide pin hole (23). The guide pin hole (23) is slidably connected to the limiting cone pin (25), and the limiting cone pin (25) is elastically pressed against the bottom wall of the guide pin hole (23), and the upper end can be inserted into the positioning pin hole (22); the side wall of the limiting cone pin (25) is fixedly installed with a lever (26), and the lever (26) passes through the drive guide groove (24).

7. The welding positioning device for gas turbine production according to claim 1, characterized in that, The heavy-duty anti-overturning support assembly includes a connecting shaft (27) which is horizontally rotatably connected to the side wall of the fixed seat (1); a support screw (28) is vertically fixed to the outer end of the connecting shaft (27), a support sleeve (29) is screwed onto the support screw (28), and a stepped guide groove (30) is provided axially inside the support sleeve (29); a support seat (31) is slidably connected inside the stepped guide groove (30), and a return spring (32) is fixedly connected between the support seat (31) and the bottom wall of the stepped guide groove (30); A storage plate (33) is fixedly installed on the side wall of the fixed seat (1). In the storage state, the support screw (28) is horizontally attached to the side wall of the fixed seat, and the support seat (31) and the storage plate (33) fit together. The rotating support screw sleeve (29) can adjust the overall support height along the axis of the support screw (28).

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