Tooling structure for welding turbine blade

Abstract

The application provides a tool structure for turbine blade welding, which is simple in structure, convenient to operate, and good in blade and cover plate fitting effect, thereby reducing defects and improving the use performance of the blade. The tool structure comprises a base provided with a guide rod; a blade positioning tool comprising a first tool body and a second tool body, a cavity of the first tool body and the second tool body after splicing is used for positioning the bottom position of the blade, and the blade tip of the blade protrudes outward after penetrating the open end of the cavity; a cover plate clamping seat comprising a fixed clamping plate, a sliding clamping plate and a support plate, one end of the support plate in the length direction towards the blade positioning tool is provided with the fixed clamping plate, and the other end is provided with the sliding clamping plate, the sliding clamping plate is arranged towards the fixed clamping plate, and the fixed clamping plate and the sliding clamping plate form a clamping space for clamping the cover plate; and a cover plate position adjusting assembly comprising a connecting rod, a rotating bolt, a rotating rod, a horizontal and angle adjusting mechanism and a horizontal and angle fine adjusting mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of turbine blade assembly, specifically to a tooling structure for welding turbine blades. Background Technology

[0002] Turbine blades are key components of gas turbines, and their temperature resistance is an important indicator for evaluating turbine performance and lifespan. To improve blade temperature resistance, besides improving alloy composition and enhancing the material's high-temperature resistance, refining the blade's cooling structure is also crucial. Therefore, developing hollow air-cooled blades with complex internal cavities, film cooling holes, and turbulence columns can significantly improve the high-temperature resistance of turbine blades. Furthermore, the shroud used to seal the airflow at the blade tip is a major component of turbine blades. To ensure precise, flat, and smooth welding of the shroud onto the blade, thereby reducing defects such as cracks, pits, and inclusions and improving blade performance, there is an urgent need to develop a suitable tooling for welding turbine blade shrouds.

[0003] Existing methods for welding cover plates mainly include welding positioning fixtures and adding adhesives. Welding positioning fixtures may generate high assembly stress, and it is difficult to maintain a uniform welding gap, resulting in uneven welds. This can have many adverse effects on the performance of subsequent blades. When adhesives are added, if the base material has poor conductivity and the adhesive evaporates quickly, it can sometimes cause displacement of the cover plate, leading to a shift in the gap between the blade and the cover plate. It can even cause brazing filler metal to flow into the cooling holes, damaging the blades.

[0004] Therefore, there is an urgent need to develop a tooling that can precisely, flatly, and smoothly weld the cover plate onto the turbine blade. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a tooling structure for welding turbine blades. This structure is simple and easy to operate, resulting in a good fit between the blade and the cover plate, thereby reducing defects and improving the performance of the blade.

[0006] A tooling structure for welding turbine blades, characterized in that it comprises:

[0007] The base has an upward-protruding guide rod on it;

[0008] The blade positioning fixture includes a first fixture body and a second fixture body. The cavity formed by assembling the first fixture body and the second fixture body is used to position the bottom of the blade. The blade tip protrudes outward after passing through the opening of the cavity. In the assembled state, the blade is arranged horizontally.

[0009] A cover plate clamping seat includes a fixed clamping plate, a sliding clamping plate, and a support plate. One end of the support plate facing the blade positioning fixture along its length is provided with a protruding fixed clamping plate, and the other end is provided with a protruding sliding clamping plate. The sliding clamping plate is arranged facing the fixed clamping plate and forms a clamping space for clamping the cover plate.

[0010] And a cover plate position adjustment assembly, which includes a connecting rod, a rotating bolt, a rotating rod, a lateral and angle adjustment mechanism, and a lateral and angle fine adjustment mechanism;

[0011] The connecting rod is positioned above the guide rod and arranged horizontally. One end of the connecting rod is fixed to the corresponding position on the upper part of the guide rod, and the other end of the connecting rod is pivotally connected to the upper end of the rotating rod. The rotating bolt drives the upper end of the rotating rod to rotate. The lower end of the rotating rod is provided with a lateral and angle adjustment mechanism. The output end of the lateral and angle adjustment mechanism is connected to the lateral and angle fine-tuning mechanism through a connecting rod. The output end of the lateral and angle fine-tuning mechanism is connected to the cover plate clamping seat.

[0012] The blade positioning fixture is positioned in the positioning hole slot of the guide rod by a connecting seat and positioning bolts. The positioning hole slot is an elongated slot set in the height direction, which allows the position of the blade positioning fixture to be adjusted in the height direction as needed.

[0013] The end face of the connecting seat facing the blade positioning fixture is provided with a horizontal transverse guide groove. The rear end faces of the first fixture body and the second fixture body have contour protrusions. The contour protrusions are embedded in the horizontal transverse guide groove and are used to open or close the cavity.

[0014] Its further features are:

[0015] The sliding clamp and the support plate are connected by a first guide rail structure. The cover plate clamping seat also includes a clamping bolt. The two ends of the clamping bolt in the length direction are respectively connected to the inner end of the clamping space of the sliding clamp and the fixed clamp.

[0016] The sliding clamp and the fixed clamp are respectively provided with a first pad on their opposing surfaces to ensure that the clamping will not damage the cover plate.

[0017] After the first tooling body and the second tooling body are assembled in place, protruding tooling fixing bolts are provided at the top and bottom facing positions of the first tooling body and the second tooling body, and the tooling fixing bolts lock the first tooling body and the second tooling body.

[0018] The lateral and angle adjustment mechanism includes fixed wheels at both ends, a rotating wheel in the middle, and a rotating gear on the outer side. The rotating shaft of the rotating gear passes through the central hole of one of the fixed wheels and is fixed to the rotating wheel. A connecting plate is fixedly installed on the radial position of the outer circumference of the rotating wheel. One end of the connecting plate is fixedly connected to one end of the connecting rod. The other end of the connecting rod is equipped with the lateral and angle fine adjustment mechanism.

[0019] The bottom of the rotating rod is provided with a horizontal guide groove, and the upper ends of the two fixed wheels are provided with fixed plates. The top of the fixed plates is embedded in the horizontal guide groove. Under the action of external horizontal force, the fixed plates drive the lower mechanism to move along the horizontal guide groove.

[0020] The lateral and angular fine-tuning mechanism includes a rotating positioning wheel and an outwardly protruding handle. The rotating positioning wheel is supported on the connecting rod and rotates around the central axis of the connecting rod under external force. Several outwardly protruding handles are arranged around the outer ring of the rotating positioning wheel. The outer end of the rotating positioning wheel protrudes to connect to the connecting shaft. A protruding connecting shaft is arranged at the radial center of the outer end of the connecting shaft. The support plate is fixedly installed at the end of the protruding connecting shaft.

[0021] Using this invention, firstly, the blade positioning fixture is opened, and the bottom of the blade is fixed in the cavities of the first and second fixture bodies, and locked with fixture fixing bolts to secure the blade. Then, the blade is moved to a suitable position by moving the positioning bolts and locked. Next, a cover plate with a beveled, blunt edge is fixed in the clamping space of the cover plate clamping seat. Then, the rotating rod is rotated by rotating bolts to bring the cover plate to a suitable position. Next, the position of the cover plate is moved and adjusted using the lateral and angle adjustment mechanism. Finally, the direction and gap of the cover plate are finely adjusted using the lateral and angle fine-tuning mechanism to precisely match the position of the cover plate and the blade tip. Finally, the cover plate is welded and fixed using manual argon arc welding. After completion, the fixture is moved to weld the next cover plate. Attached Figure Description

[0022] Figure 1 The three-dimensional representation of the present invention Figure 1 ;

[0023] Figure 2 The three-dimensional representation of the present invention Figure 2 ;

[0024] Figure 3 This is an enlarged view of the assembly of the blade positioning fixture of the present invention;

[0025] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point A;

[0026] Figure 5This is an enlarged structural schematic diagram of the cover plate clamping seat of the present invention;

[0027] Figure 6 This is a schematic diagram of the assembly of the present invention for welding blades and cover plates. Detailed Implementation

[0028] A tooling structure for welding turbine blades, see Figures 1-5 It includes a base 10, a blade positioning fixture 20, a cover plate clamping seat 30, and a cover plate position adjustment assembly 40;

[0029] The base 10 is provided with an upwardly protruding guide rod 11; the blade positioning fixture 20 includes a first fixture body 21 and a second fixture body 22. The cavity after the first fixture body 21 and the second fixture body 22 are assembled is used to position the bottom of the blade 1. The blade tip of the blade 1 protrudes outward after passing through the opening of the cavity. In the assembled state, the blade 1 is arranged horizontally; the cover plate clamping seat 30 includes a fixed clamping plate 31, a sliding clamping plate 32, and a support plate 33. One end of the support plate 33 facing the blade positioning fixture 20 is provided with a protruding fixed clamping plate 31, and the other end is provided with a protruding sliding clamping plate 32. The sliding clamping plate 32 is arranged facing the fixed clamping plate 31 and forms a clamping space. The clamping space is used to clamp the cover plate 2; the cover plate position adjustment assembly 40 includes a connecting rod 50, a rotating bolt 60, a rotating rod 70, a lateral and angle adjustment mechanism 80, and a lateral and angle fine adjustment mechanism 90.

[0030] The connecting rod 50 is positioned above the guide rod 11 and arranged horizontally. One end of the connecting rod 50 is fixed to the corresponding position on the upper part of the guide rod 11, and the other end of the connecting rod 50 is pivotally connected to the upper end of the rotating rod 70. The rotating bolt 60 drives the upper end of the rotating rod 70 to rotate. The lower end of the rotating rod 70 is provided with a lateral and angle adjustment mechanism 80. The output end of the lateral and angle adjustment mechanism 80 is connected to the lateral and angle fine adjustment mechanism 90 through the connecting rod 100. The output end of the lateral and angle fine adjustment mechanism 90 is connected to the cover plate clamping seat 30.

[0031] The blade positioning fixture 20 is positioned in the positioning hole slot 111 of the guide rod 11 by the connecting seat 120 and the positioning bolt 110. The positioning hole slot is an elongated slot set in the height direction of 111, which allows the position of the blade positioning fixture 20 to be adjusted in the height direction according to the requirements.

[0032] The end face of the connecting seat 120 facing the blade positioning fixture 20 is provided with a horizontal transverse guide groove 121. The rear end faces of the first fixture body 21 and the second fixture body 22 have contoured protrusions. The contoured protrusions are embedded in the horizontal transverse guide groove 121 and are used to open or close the cavity. The contoured protrusions on the rear end faces of the first fixture body 21 and the second fixture body 22 are embedded in the horizontal transverse guide groove 121 and move parallel according to the size of the blade 1. After the distance between the first fixture body 21 and the second fixture body 22 is completely fixed to the blade 1, the fixture positioning bolts 130 are provided on the upper and lower parts of the fixture body and then locked. The internal cavity of the first fixture body 21 and the second fixture body 22 is dovetail-shaped and a sealing material is provided inside the mold to better fix the blade 1 and prevent it from moving; and to protect the shape of the blade 1 and prevent the fixture from hitting the blade 1 and causing damage.

[0033] In practice, the positioning bolt 110 is equipped with a washer structure to ensure a secure and reliable locking.

[0034] The sliding clamp 32 and the support plate 33 are connected by the first guide rail structure 34. The cover plate clamping seat 30 also includes a clamping bolt 35, the two ends of which are connected to the inner end positions of the clamping space of the sliding clamp 32 and the fixed clamp 31, respectively.

[0035] First pads 36 are respectively provided on the opposing surfaces of the sliding clamp 32 and the fixed clamp 31 to ensure that the clamping will not damage the cover plate 2;

[0036] The lateral and angle adjustment mechanism 80 includes fixed wheels 81 at both ends, a rotating wheel 82 in the middle, and a rotating gear 83 on the outer side. The rotating shaft of the rotating gear 83 passes through the central hole of one of the fixed wheels 81 and is fixed to the rotating wheel 82. A connecting plate 84 is fixedly installed at a radial position on the outer circumference of the rotating wheel 82. One end of the connecting plate 84 is fixedly connected to one end of the connecting rod 100. The other end of the connecting rod 100 is equipped with a lateral and angle fine adjustment mechanism 90.

[0037] The bottom of the rotating rod 70 is provided with a horizontal transverse guide groove 71, and the upper end of the two fixed wheels 81 is provided with a fixed plate 85. The top of the fixed plate 85 is embedded in the horizontal transverse guide groove 71. Under the action of external transverse force, the fixed plate 85 drives the lower mechanism to move along the horizontal transverse guide groove 71 to adjust the transverse position.

[0038] The lateral and angle fine-tuning mechanism 90 includes a rotating positioning wheel 91 and an outwardly protruding handle 92. The rotating positioning wheel 91 is supported on the connecting rod 100 and rotates around the central axis of the connecting rod 100 under external force. Several outwardly protruding handles 92 are arranged around the outer ring of the rotating positioning wheel 91. The outer end of the rotating positioning wheel 91 protrudes to connect to the connecting shaft 93. A protruding connecting shaft 94 is arranged radially at the outer end of the connecting shaft 93. A support plate 33 is fixedly installed at the end of the protruding connecting shaft 94. In specific implementation, the protruding connecting shaft 94 and the connecting shaft 93 are arranged coaxially, and the outer diameter of the protruding connecting shaft 94 is smaller than the outer diameter of the connecting shaft 93.

[0039] In practice, support blocks 12 are also provided at the four corners of the base 10. The support blocks 12 are mainly used to support the base 10 and prevent damage to the base 10.

[0040] All track slots are T-shaped to ensure stable and reliable movement.

[0041] After adopting this invention, welding positioning is observed. Figure 6 First, by opening the blade positioning fixture 20, the bottom of the blade 1 is fixed inside the cavities of the first fixture body 21 and the second fixture body 22, and locked with the fixture fixing bolt 130 to fix the blade 1. Then, the blade is moved to the appropriate position by moving the positioning bolt 110 and locked. Next, the cover plate 2 with a beveled edge is fixed in the clamping space of the cover plate clamping seat 30. During clamping and positioning, the sliding clamping plate 32 is moved according to the size of the cover plate 2, and then clamped and fixed with the tightening bolt 35. After that, by... Rotate the rotating bolt 60 to rotate the rotating rod 70, allowing the cover plate 2 to reach the appropriate position; then, adjust the lateral position by moving the driving fixing plate 85 along the horizontal transverse guide groove 71, then drive the rotating gear 83 to adjust the horizontal rotation angle of the cover plate 2 along the transverse axis, and finally, drive the rotating positioning wheel 91 by turning the outward protruding handle 92 to finely adjust the direction and gap of the cover plate 2 to accurately match the position of the cover plate 2 and the blade tip; finally, weld and fix the cover plate by manual argon arc welding, and after completion, move the fixture to weld the next cover plate.

[0042] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tooling structure for welding turbine blades, characterized in that, It includes: The base has an upward-protruding guide rod on it; The blade positioning fixture includes a first fixture body and a second fixture body. The cavity formed by assembling the first fixture body and the second fixture body is used to position the bottom of the blade. The blade tip protrudes outward after passing through the opening of the cavity. In the assembled state, the blade is arranged horizontally. A cover plate clamping seat includes a fixed clamping plate, a sliding clamping plate, and a support plate. One end of the support plate facing the blade positioning fixture along its length is provided with a protruding fixed clamping plate, and the other end is provided with a protruding sliding clamping plate. The sliding clamping plate is arranged facing the fixed clamping plate and forms a clamping space for clamping the cover plate. And a cover plate position adjustment assembly, which includes a connecting rod, a rotating bolt, a rotating rod, a lateral and angle adjustment mechanism, and a lateral and angle fine adjustment mechanism; The connecting rod is positioned above the guide rod and arranged horizontally. One end of the connecting rod is fixed to the corresponding position on the upper part of the guide rod, and the other end of the connecting rod is pivotally connected to the upper end of the rotating rod. The rotating bolt drives the upper end of the rotating rod to rotate. The lower end of the rotating rod is provided with a lateral and angle adjustment mechanism. The output end of the lateral and angle adjustment mechanism is connected to the lateral and angle fine-tuning mechanism through a connecting rod. The output end of the lateral and angle fine-tuning mechanism is connected to the cover plate clamping seat. The blade positioning fixture is positioned in the positioning hole slot of the guide rod by a connecting seat and positioning bolts. The positioning hole slot is an elongated slot set in the height direction, which allows the position of the blade positioning fixture to be adjusted in the height direction as needed. The end face of the connecting seat facing the blade positioning fixture is provided with a horizontal transverse guide groove. The rear end faces of the first fixture body and the second fixture body have contour protrusions. The contour protrusions are embedded in the horizontal transverse guide groove and are used to open or close the cavity.

2. The tooling structure for welding turbine blades as described in claim 1, characterized in that: The sliding clamp and the support plate are connected by a first guide rail structure. The cover plate clamping seat also includes a clamping bolt. The two ends of the clamping bolt in the length direction are respectively connected to the inner end of the clamping space of the sliding clamp and the fixed clamp.

3. The tooling structure for welding turbine blades as described in claim 2, characterized in that: The sliding clamp and the fixed clamp are respectively provided with a first pad on their opposing surfaces.

4. The tooling structure for welding turbine blades as described in claim 1, characterized in that: After the first tooling body and the second tooling body are assembled in place, protruding tooling fixing bolts are provided at the top and bottom facing positions of the first tooling body and the second tooling body, and the tooling fixing bolts lock the first tooling body and the second tooling body.

5. The tooling structure for welding turbine blades as described in claim 1, characterized in that: The lateral and angle adjustment mechanism includes fixed wheels at both ends, a rotating wheel in the middle, and a rotating gear on the outer side. The rotating shaft of the rotating gear passes through the central hole of one of the fixed wheels and is fixed to the rotating wheel. A connecting plate is fixedly installed at a radial position on the outer circumference of the rotating wheel. One end of a connecting rod is fixedly connected to the exposed end of the connecting plate. The lateral and angle fine-tuning mechanism is installed at the other end of the connecting rod.

6. The tooling structure for welding turbine blades as described in claim 5, characterized in that: The bottom of the rotating rod is provided with a horizontal guide groove, and the upper ends of the two fixed wheels are provided with fixed plates. The top of the fixed plates is embedded in the horizontal guide groove. Under the action of external horizontal force, the fixed plates drive the lower mechanism to move along the horizontal guide groove.

7. The tooling structure for welding turbine blades as described in claim 5, characterized in that: The lateral and angular fine-tuning mechanism includes a rotating positioning wheel and an outwardly protruding handle. The rotating positioning wheel is supported on the connecting rod and rotates around the central axis of the connecting rod under external force. Several outwardly protruding handles are arranged around the outer ring of the rotating positioning wheel. The outer end of the rotating positioning wheel protrudes to connect to the connecting shaft. A protruding connecting shaft is arranged at the radial center of the outer end of the connecting shaft. The support plate is fixedly installed at the end of the protruding connecting shaft.

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