A clamping tool for laser welding of a vane cover plate

Abstract

The utility model provides a kind of clamping tool for vane cover plate laser welding, it includes adjustable base assembly, horizontal adjusting assembly, rotary adjusting assembly and clamping assembly sequentially connected from bottom to top along vertical direction, the height of clamping assembly clamping blade can be adjusted by adjustable base assembly, to adapt the height of laser head;The rotating angle of clamping assembly can be adjusted by rotary adjusting assembly, to carry out angle adjustment to the blade clamped by clamping assembly;The adjustment of horizontal direction perpendicular to vertical direction of rotary adjusting assembly can be adjusted by horizontal adjusting assembly, i.e. the horizontal direction of clamping assembly is adjusted, to adapt the welding demand of different positions of laser head to vane top cover plate. The clamping and fixing of vane and cover plate are realized by the horizontal clamping block and vertical clamping piece of clamping assembly, to realize accurate welding of cover plate and vane top.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of laser welding tooling technology, specifically relating to a clamping tooling for laser welding of blade cover plates. Background Technology

[0002] Gas turbine or steam turbine blades are critical components that withstand high-temperature, high-pressure airflow, and their tops are typically designed with cover plates. The cover plate structure not only serves to seal the blades but also plays a crucial role in aerodynamic performance, thermal protection, and structural integrity. Especially in the high-pressure turbine section, the geometric accuracy of the cover plate directly affects the turbine's thermal efficiency and dynamic balance performance.

[0003] During blade manufacturing and repair, cover plates often need to be welded or repaired to restore their complete structure or achieve a sealed connection. The precision of cover plate welding directly affects the clearance control, mating consistency, and airflow distribution after blade assembly; therefore, the quality control of the welding process is crucial.

[0004] Traditional welding processes (such as TIG welding and arc welding) suffer from problems such as high heat input, wide heat-affected zone, and significant weld deformation, making them unsuitable for the complex structures, high precision requirements, and limited welding space of cover plates. In contrast, laser welding technology, with its low heat input, high energy density, and ability to perform narrow-seam and micro-welding, has become the preferred method for cover plate welding. Laser welding can effectively control weld deformation, improve the consistency and aesthetics of the post-weld structure, and facilitates automation and batch processing.

[0005] However, laser welding is very sensitive to the assembly accuracy of the workpiece, the position of the weld and the orientation angle. It is necessary to ensure that the incident direction of the laser beam is highly matched with the weld axis in order to obtain good penetration control and forming quality.

[0006] Because blades typically have certain manufacturing dimensional tolerances and clamping deviations, the installation position of the cover plate, the direction of the weld, and the spatial orientation of different blades are not entirely consistent. To ensure welding quality, it is often necessary to measure and reprogram the welding trajectory of each blade individually. This process is not only time-consuming and labor-intensive, but also increases the reliance on manual intervention and operational experience, severely limiting the efficiency and consistency of automated batch welding.

[0007] Therefore, there is an urgent need to develop a compact, precisely adjustable, small-angle rotation and efficient clamping precision clamping and fine-tuning rotation mechanism to improve assembly efficiency, trajectory matching and welding quality consistency in the laser welding process of cover plates. Utility Model Content

[0008] The embodiments of this utility model aim to at least solve one of the technical problems existing in the prior art, and provide a clamping fixture for laser welding of blade cover plates.

[0009] Embodiments of this disclosure provide a clamping fixture for laser welding of blade covers. The clamping fixture includes an adjustable base assembly, a horizontal adjustment assembly, a rotary adjustment assembly, and a clamping assembly connected sequentially from bottom to top along the vertical direction. The adjustable base assembly is used to adjust the horizontal adjustment assembly, the horizontal adjustment assembly is used to adjust the rotary adjustment assembly to move perpendicular to the vertical direction, and the rotary adjustment assembly is used to adjust the clamping assembly to rotate about the vertical direction.

[0010] The clamping assembly includes: a clamping base, two horizontal clamping blocks, and a vertical clamping member. At least one of the horizontal clamping blocks is movably connected to the top of the clamping base in a manner perpendicular to the vertical direction. The vertical clamping member is disposed above the horizontal clamping blocks in a manner movably along the vertical direction. The two horizontal clamping blocks cooperate to clamp the bottom of the blade. The vertical clamping member cooperates with the horizontal clamping blocks to clamp the blade and the cover plate in a vertical direction.

[0011] In some embodiments of this disclosure, the clamping assembly includes a first horizontal clamping block and a second horizontal clamping block disposed opposite to each other. The first horizontal clamping block is fixedly connected to the top of the clamping base, and the second horizontal clamping block is movably connected to the top of the clamping base in a manner perpendicular to the vertical direction. The second clamping block moves toward the first clamping block to clamp the blade and the cover plate.

[0012] In some embodiments of this disclosure, the top of the clamping base is provided with a groove, the second horizontal clamping block is located in the groove, and the second horizontal clamping block can slide along the groove.

[0013] In some embodiments of this disclosure, the clamping assembly further includes a support member and a horizontal clamping bolt. The support member is disposed on the side of the second horizontal clamping block opposite to the first horizontal clamping block. The horizontal clamping bolt engages with a horizontal threaded hole at the lower part of the support member and passes through the lower part of the support member. One end of the horizontal clamping bolt is connected to the second horizontal clamping block.

[0014] In some embodiments of this disclosure, the clamping assembly further includes a vertical clamping bolt connected to the vertical clamping member, the vertical clamping bolt engaging with a vertical threaded hole at the top of the support member to enable the vertical clamping member to move in the vertical direction.

[0015] In some embodiments of this disclosure, the vertical clamping member includes at least one vertical clamping rod, which is arranged vertically above the horizontal clamping block. One end of the vertical clamping rod is connected to the top of the support rod in a manner that allows it to move vertically, and the other end of the vertical clamping rod is used to abut against the cover plate at the top of the blade.

[0016] In some embodiments of this disclosure, the number of vertical clamping rods is three, and the three vertical clamping rods are spaced apart on a plane perpendicular to the vertical direction.

[0017] In some embodiments of this disclosure, the adjustable base assembly includes: a base plate and at least three height adjustment members, the at least three height adjustment members being disposed at the bottom of the base plate, the at least three height adjustment members being arranged in a polygonal pattern, and the height adjustment members being extendable and retractable along the vertical direction.

[0018] In some embodiments of this disclosure, the adjustable base assembly further includes at least two positioning members disposed at the bottom of the base plate. In the vertical direction, the length of the positioning member is greater than the maximum length of the height adjustment member, and the positioning member is used to cooperate with the positioning hole of the welding platform.

[0019] In some embodiments of this disclosure, the horizontal adjustment assembly includes a first direction adjustment platform and a second direction adjustment platform. The first direction adjustment platform is disposed on the top of the adjustable base assembly, and the second direction adjustment platform is disposed on the top of the first direction adjustment platform. The rotation adjustment assembly is disposed on the top of the second direction adjustment platform. The first direction adjustment platform is used to adjust the second direction adjustment platform to move along a first direction, and the second direction adjustment platform is used to adjust the rotation adjustment assembly to move along a second direction. Both the first direction and the second direction are perpendicular to the vertical direction, and the first direction is perpendicular to the second direction.

[0020] According to an embodiment of this disclosure, a clamping fixture for laser welding of blade cover plates includes an adjustable base assembly, a horizontal adjustment assembly, a rotary adjustment assembly, and a clamping assembly connected sequentially from bottom to top along the vertical direction. The adjustable base assembly allows adjustment of the height of the blade clamped by the clamping assembly to accommodate the height of the laser head. The rotary adjustment assembly allows adjustment of the rotation angle of the clamping assembly to adjust the angle of the blade clamped by the clamping assembly. The horizontal adjustment assembly allows adjustment of the horizontal direction of the rotary adjustment assembly perpendicular to the vertical direction, i.e., adjusting the horizontal direction of the clamping assembly to accommodate the welding requirements of the laser head at different positions of the blade top cover plate. The clamping assembly includes two horizontal clamping blocks and a vertical clamping member disposed on the top of the clamping base. At least one horizontal clamping block moves perpendicular to the vertical direction to clamp the bottom of the blade. The vertical clamping member is disposed above the horizontal clamping blocks and moves along the vertical direction, contacting the cover plate at the top of the blade. The vertical clamping member cooperates with the horizontal clamping blocks to clamp the blade in the vertical direction. The horizontal clamping blocks and the vertical clamping member of the clamping assembly clamp and fix the blade and the cover plate, thereby achieving precise welding of the cover plate and the top of the blade. The clamping fixture of this embodiment has the characteristics of compact structure, precise adjustment, support for small-angle rotation and efficient clamping, which can improve the assembly efficiency, trajectory matching and welding quality consistency in the laser welding process of the cover plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the clamping fixture for laser welding of blade cover plates according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 The front view of the clamping fixture used for laser welding of blade cover plates is shown.

[0023] Figure 3 for Figure 2 The top view shown is of the clamping fixture used for laser welding of blade cover plates.

[0024] Figure 4 for Figure 1 The figure shows a cross-sectional view of the clamping fixture used for laser welding of blade cover plates.

[0025] Figure 5 for Figure 4 Enlarged view of part A shown.

[0026] The labels in the attached diagram are as follows:

[0027] 100. Clamping fixture for laser welding of blade cover plates;

[0028] 10. Adjustable base assembly; 11. Base plate; 12. Height adjustment component; 13. Positioning component;

[0029] 20. Horizontal adjustment assembly; 21. First direction adjustment platform; 22. Second direction adjustment platform;

[0030] 30. Rotation adjustment assembly;

[0031] 40. Clamping assembly; 41. Clamping base; 411. Slide groove; 42. First horizontal clamping block; 43. Second horizontal clamping block; 44. Vertical clamping component; 441. Vertical clamping rod; 45. Support component; 46. Horizontal clamping bolt; 47. Vertical clamping bolt;

[0032] 200. Leaf blade;

[0033] 300. Cover plate;

[0034] 400. Laser head. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining this disclosure and are not intended to limit the disclosure. The described embodiments are some, but not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this disclosure.

[0036] like Figures 1 to 5 As shown, an embodiment of this disclosure provides a clamping fixture 100 for laser welding of blade cover plates. The clamping fixture includes an adjustable base assembly 10, a horizontal adjustment assembly 20, a rotary adjustment assembly 30, and a clamping assembly 40 connected sequentially from bottom to top along the vertical direction. The adjustable base assembly 10 is used to adjust the height of the clamping assembly 40, the horizontal adjustment assembly 20 is used to adjust the movement of the clamping assembly 40 perpendicular to the vertical direction, and the rotary adjustment assembly 30 is used to adjust the rotation of the clamping assembly 40 about the vertical direction. The clamping assembly 40 includes a clamping base 41, two horizontal clamping blocks, and a vertical clamping member 44. At least one horizontal clamping block is movably connected to the top of the clamping base 41 perpendicular to the vertical direction. The vertical clamping member 44 is movably disposed above the horizontal clamping blocks. The two horizontal clamping blocks cooperate to clamp the bottom of the blade 200, and the vertical clamping member 44 cooperates with the horizontal clamping blocks to clamp the blade 200 and the cover plate 300 along the vertical direction.

[0037] According to an embodiment of this disclosure, a clamping fixture 100 for laser welding of blade cover plates includes an adjustable base assembly 10, a horizontal adjustment assembly 20, a rotary adjustment assembly 30, and a clamping assembly 40 connected sequentially from bottom to top along the vertical direction. The adjustable base assembly 10 can adjust the height of the clamping assembly 40 clamping the blade 200 to adapt to the height of the laser head 400. The rotary adjustment assembly 30 can adjust the rotation angle of the clamping assembly 40 to adjust the angle of the blade 200 clamped by the clamping assembly 40. The horizontal adjustment assembly 20 can adjust the horizontal direction of the rotary adjustment assembly 30 perpendicular to the vertical direction, that is, adjust the horizontal direction of the clamping assembly 40 to adapt to the welding requirements of the laser head 400 at different positions of the top cover plate 300 of the blade 200. The clamping assembly 40 includes two horizontal clamping blocks and a vertical clamping member 44 disposed on the top of the clamping base 41. At least one horizontal clamping block moves perpendicular to the vertical direction to clamp the bottom of the blade 200. The vertical clamping member 44 is disposed above the horizontal clamping blocks and moves vertically. The vertical clamping member 44 contacts the cover plate 300 on the top of the blade 200. The vertical clamping member 44 cooperates with the horizontal clamping blocks to clamp the blade 200 in the vertical direction. The clamping assembly 40 uses the horizontal clamping blocks and the vertical clamping member 44 to clamp and fix the blade 200 and the cover plate 300, thereby achieving precise welding of the cover plate 300 and the top of the blade 200. The clamping fixture of this embodiment has the characteristics of compact structure, precise adjustment, support for small-angle rotation and efficient clamping, which can improve the assembly efficiency, trajectory matching and welding quality consistency in the laser welding process of the cover plate. Specifically, the two horizontal clamping blocks of the clamping assembly 40 are arranged opposite to each other. One horizontal clamping block of the clamping assembly 40 is fixedly connected to the top of the clamping base 41, and the other horizontal clamping block is movably connected to the top of the clamping base 41. By moving the movable horizontal clamping block towards the fixed horizontal clamping block, the bottom part of the blade 200 can be clamped between the two horizontal clamping blocks. Alternatively, both horizontal clamping blocks of the clamping assembly 40 are movably connected to the top of the clamping base 41, and the movement trajectories of the two oppositely arranged horizontal clamping blocks are on the same straight line. The two horizontal clamping blocks move towards each other, which can also clamp the bottom part of the blade 200 between the two horizontal clamping blocks, thus achieving clamping of the bottom of the blade 200.

[0038] In some embodiments of this disclosure, such as Figure 1 , Figure 2 and Figure 4As shown, the clamping assembly 40 includes a first horizontal clamping block 42 and a second horizontal clamping block 43 disposed opposite to each other. The first horizontal clamping block 42 is fixedly connected to the top of the clamping base 41, and the second horizontal clamping block 43 is movably connected to the top of the clamping base 41 in a manner perpendicular to the vertical direction, that is, the second horizontal clamping block 43 moves in a horizontal plane perpendicular to the vertical direction. When the second horizontal clamping block 43 moves toward the first horizontal clamping block 42, the distance between the first horizontal clamping block 42 and the second horizontal clamping block 43 decreases, which can clamp the bottom part of the blade 200; when the second horizontal clamping block moves away from the first horizontal clamping block 42, the distance between the first horizontal clamping block 42 and the second horizontal clamping block 43 increases, which can contact and clamp the bottom part of the blade 200.

[0039] Specifically, the first horizontal clamping block 42 has a shape on the side facing the second horizontal clamping block 43 that is adapted to the bottom shape of the blade 200, and the second water blade clamping block has a shape on the side facing the first horizontal clamping block 42 that is adapted to the bottom shape of the blade 200, so as to improve the stability and reliability of the horizontal clamping block clamping the bottom of the blade 200.

[0040] Furthermore, such as Figure 4 As shown, the top of the clamping base 41 is provided with a sliding groove 411 that is adapted to the second horizontal clamping block 43. The second horizontal clamping block 43 is located in the sliding groove 411. The sliding groove 411 can provide a stable track for the movement of the second horizontal clamping block 43, thereby improving the stability and reliability of the sliding of the second horizontal clamping block 43.

[0041] In some embodiments of this disclosure, the clamping assembly 40 further includes a support member 45 and a horizontal clamping bolt 46. The support member 45 is disposed on the side of the second horizontal clamping block 43 facing away from the first horizontal clamping block 42. The horizontal clamping bolt 46 engages with a horizontal threaded hole at the lower part of the support member 45 and passes through the lower part of the support member 45. One end of the horizontal clamping bolt 46 is connected to the second horizontal clamping block 43, and the other end of the horizontal clamping bolt 46 is located on the side of the support rod facing away from the second water-plate clamping block. Specifically, the axis of the horizontal bolt at the lower part of the support rod is parallel to the moving direction of the second horizontal clamping block 43, so that the moving direction of the horizontal clamping bolt 46 is parallel to the moving direction of the second horizontal clamping block 43.

[0042] In some embodiments of this disclosure, the clamping assembly 40 further includes a vertical clamping bolt 47, which is connected to a vertical clamping member 44. The vertical clamping bolt 47 engages with a vertical threaded hole at the top of the support member 45 to allow the vertical clamping bolt 47 to move in the vertical direction. Specifically, the axis of the vertical threaded hole at the top of the support member 45 is parallel to the vertical direction, so that the vertical clamping bolt 47 can move in the vertical direction, thereby driving the vertical clamping member 44 to move in the vertical direction, so that the vertical clamping member 44 abuts against the cover plate 300 at the top of the blade 200 (e.g., Figure 5 As shown), the horizontal clamping block restricts the blade 200 from moving downwards. That is, the horizontal clamping block and the vertical clamping member 44 clamp the blade 200 in the vertical direction to fix the direction of the blade 200.

[0043] In some embodiments of this disclosure, the vertical clamping member 44 includes at least one vertical clamping rod 441, which is arranged perpendicularly to the vertical direction above the horizontal clamping block. One end of the vertical clamping rod 441 is connected to the top of the support rod in a vertically movable manner, and the other end of the vertical clamping rod 441 is used to abut against the cover plate 300 at the top of the blade 200 (e.g., Figure 5 (As shown). Specifically, the blade 200 and cover plate 300 can be clamped and fixed by a vertical clamping rod 441 parallel to the horizontal direction cooperating with a horizontal clamping block. Two, three, four, five, or more vertical clamping rods 441 cooperating with the horizontal clamping block can further improve the clamping reliability of the blade 200 and cover plate 300 in the vertical direction. Furthermore, two or more vertical clamping rods 441 are spaced apart in the horizontal direction to facilitate the laser head 400 above the clamping fixture to perform electric welding on the top of the cover plate 300 and blade 200 between adjacent vertical clamping rods 441.

[0044] In some embodiments of this disclosure, such as Figure 1As shown, there are three vertical clamping rods 441, which are spaced apart on a plane perpendicular to the vertical direction, i.e., spaced apart in the horizontal direction. The three vertical clamping rods 441 are arranged at both ends and the middle of the cover plate 300 at the top of the blade 200, following the shape of the cover plate 300. This allows the laser head 400 above the clamping fixture to perform electric welding between adjacent vertical clamping rods 441 on the cover plate 300 and the top of the blade 200. The three vertical clamping rods 441 provide sufficient clamping stability, and the distance between adjacent vertical clamping rods 441 is sufficient for the laser head 400 to perform electric welding operations. Furthermore, the vertical clamping rod 441 has a protrusion on the side facing the horizontal clamping block. When the vertical clamping rod 441 and the horizontal clamping block jointly clamp the blade 200 and the cover plate 300 in the vertical direction, the protrusion on the vertical clamping rod 441 contacts and abuts against the cover plate 300 (e.g., Figure 5 (As shown).

[0045] In some embodiments of this disclosure, such as Figure 3 As shown, the adjustable base assembly 10 includes a base plate 11 and at least three height adjusting members 12. The at least three height adjusting members 12 are located at the bottom of the base plate 11 and are arranged in a polygonal pattern. The height adjusting members 12 are extendable and retractable along the vertical direction. The height of the base plate 11 can be adjusted using the at least three height adjusting members 12. Then, the height of the clamping assembly 40 can be adjusted using the horizontal adjustment assembly 20 and the rotary adjustment assembly 30, thereby achieving the adjustment of the height of the blade 200 and the cover plate 300. Specifically, if the three height adjusting members 12 are arranged in a triangle, the base plate 11 can be adjusted to different heights while remaining perpendicular to the vertical direction. If the three or more height adjusting members 12 are arranged in a polygonal pattern, the base plate 11 can also be adjusted to different heights while remaining perpendicular to the vertical direction. In this embodiment, four adjusting members are used, with the four height adjusting members 12 located near the four corners of the rectangular base plate 11, enabling different height adjustments and ensuring a more even distribution of the base plate 11.

[0046] In some embodiments of this disclosure, such as Figure 3As shown, the adjustable base assembly 10 also includes at least two positioning members 13, which are disposed at the bottom of the base plate 11. The at least two positioning members 13 can fix the relative position of the adjustable base assembly 10 and the welding platform, providing stable support for the clamping assembly 40. In this embodiment, two positioning members 13 are sufficient to fix the relative position of the base plate 11 and the welding platform; more than two positioning members 13 can further improve the stability of the base plate 11. In the vertical direction, the length of the positioning member 13 is greater than the maximum length of the height adjustment member 12. The positioning member 13 is used to cooperate with the positioning hole of the welding platform to ensure that the positioning member 13 will not come out of the fixing hole of the welding platform, thereby improving the reliability of the connection between the base plate 11 and the welding platform.

[0047] In some embodiments of this disclosure, such as Figure 1 , Figure 2 and Figure 4 As shown, the horizontal adjustment assembly 20 includes a first direction adjustment platform 21 and a second direction adjustment platform 22. The first direction adjustment platform 21 is located on top of the adjustable base assembly 10, and the second direction adjustment platform 22 is located on top of the first direction adjustment platform 21. A rotary adjustment assembly 30 is located on top of the second direction adjustment platform 22. The first direction adjustment platform 21 is used to adjust the movement of the second direction adjustment platform 22 along a first direction, and the second direction adjustment platform 22 is used to adjust the movement of the rotary adjustment assembly 30 along a second direction. Both the first and second directions are perpendicular to the vertical direction. By adjusting the first direction adjustment platform 21, the position of the second direction adjustment platform 22 in the first direction can be adjusted. The second direction adjustment assembly drives the rotary adjustment assembly 30 to move along the first direction, and the rotary adjustment assembly 30 drives the clamping assembly 40 to move in the first direction, thus realizing the adjustment of the position of the clamping assembly 40 and the clamped blade 200 and cover plate 300 in the first direction. The rotation adjustment component 30 can be adjusted to move along the second direction via the second direction adjustment platform 22. The rotation adjustment component 30 drives the clamping component 40 to move in the second direction, thereby adjusting the position of the clamping component 40 and the clamped blade 200 and cover plate 300 in the second direction. Through the cooperation of the first direction adjustment platform 21 and the second direction adjustment platform 22, the clamping component 40 can move perpendicular to the vertical direction.

[0048] In some embodiments of this disclosure, the rotation adjustment component 30 is a differential screw precision rotation mechanism, which can be used to adjust the rotation angle of the clamping component 40 about the vertical direction.

[0049] The specific process of welding using the clamping fixture of this disclosure is as follows:

[0050] The positioning element of the adjustable base assembly of the clamping fixture is inserted into the corresponding mounting hole on the welding platform to fix the clamping fixture on the welding platform, preventing the device from tipping over during blade clamping and welding, which could cause blade damage and personnel injury.

[0051] Insert the blade between the first and second horizontal clamping blocks of the clamping assembly, and move the second horizontal clamping block by tightening the horizontal clamping bolts to clamp the blade; place a cover plate on top of the blade, and use the vertical clamping components to abut the cover plate against the corresponding position on top of the blade; introduce shielding gas and turn on the laser, and perform spot welding between two adjacent vertical clamping rods of the vertical clamping components according to the cover plate welding spot welding process parameters to fix the position of the cover plate on top of the blade and prevent the cover plate from moving; open the welding path prepared during the first cover plate welding, and adjust the welding path in both height and horizontal direction to be near the position of the weld to be welded, ensuring that it overlaps as much as possible or partially overlaps; adjust the knobs of the adjustable base assembly, horizontal adjustment assembly, and rotary adjustment assembly to make the position of the weld to be welded completely overlap with the prepared welding path, and rotate and tighten the horizontal clamping bolts and vertical clamping bolts to fix the workpiece and the position of the weld to be welded; introduce shielding gas, turn on the laser, and perform laser welding of the cover plate and rib plate according to the prepared welding path and welding parameters. After welding is completed, the laser is turned off, and shielding gas is continuously supplied. Once the blade, cover plate, and weld have cooled, the shielding gas supply is stopped, and the blade is removed from the clamping fixture for the next step of non-destructive testing of the weld surface and interior. It is understood that the above embodiments are merely exemplary implementations used to illustrate the principle of this utility model; however, this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered within the protection scope of this utility model.

Claims

1. A clamping fixture for laser welding of blade cover plates, characterized in that, The clamping fixture includes an adjustable base assembly, a horizontal adjustment assembly, a rotary adjustment assembly, and a clamping assembly connected sequentially from bottom to top along the vertical direction. The adjustable base assembly is used to adjust the horizontal adjustment assembly, the horizontal adjustment assembly is used to adjust the rotary adjustment assembly to move perpendicular to the vertical direction, and the rotary adjustment assembly is used to adjust the clamping assembly to rotate around the vertical direction. The clamping assembly includes: a clamping base, two horizontal clamping blocks, and a vertical clamping member. At least one of the horizontal clamping blocks is movably connected to the top of the clamping base in a manner perpendicular to the vertical direction. The vertical clamping member is disposed above the horizontal clamping blocks in a manner movably along the vertical direction. The two horizontal clamping blocks cooperate to clamp the bottom of the blade. The vertical clamping member cooperates with the horizontal clamping blocks to clamp the blade and the cover plate in a vertical direction.

2. The clamping fixture for laser welding of blade cover plates according to claim 1, characterized in that, The clamping assembly includes a first horizontal clamping block and a second horizontal clamping block disposed opposite to each other. The first horizontal clamping block is fixedly connected to the top of the clamping base, and the second horizontal clamping block is movably connected to the top of the clamping base in a manner perpendicular to the vertical direction. The second horizontal clamping block moves toward the first horizontal clamping block to clamp the blade and the cover plate.

3. The clamping fixture for laser welding of blade cover plates according to claim 2, characterized in that, The top of the clamping base is provided with a sliding groove, and the second horizontal clamping block is located in the sliding groove, and the second horizontal clamping block can slide along the sliding groove.

4. The clamping fixture for laser welding of blade cover plates according to claim 2, characterized in that, The clamping assembly further includes a support member and a horizontal clamping bolt. The support member is disposed on the side of the second horizontal clamping block opposite to the first horizontal clamping block. The horizontal clamping bolt engages with the horizontal threaded hole at the lower part of the support member and passes through the lower part of the support member. One end of the horizontal clamping bolt is connected to the second horizontal clamping block.

5. The clamping fixture for laser welding of blade cover plates according to claim 4, characterized in that, The clamping assembly further includes a vertical clamping bolt, which is connected to the vertical clamping member. The vertical clamping bolt engages with a vertical threaded hole at the top of the support member to allow the vertical clamping member to move in the vertical direction.

6. The clamping fixture for laser welding of blade cover plates according to claim 4, characterized in that, The vertical clamping member includes at least one vertical clamping rod, which is arranged vertically above the horizontal clamping block. One end of the vertical clamping rod is connected to the top of the support rod in a manner that allows it to move vertically, and the other end of the vertical clamping rod is used to abut against the cover plate at the top of the blade.

7. The clamping fixture for laser welding of blade cover plates according to claim 5, characterized in that, There are three vertical clamping rods, which are spaced apart on a plane perpendicular to the vertical direction.

8. The clamping fixture for laser welding of blade cover plates according to claim 1, characterized in that, The adjustable base assembly includes: a base plate and at least three height adjustment members, the at least three height adjustment members being disposed at the bottom of the base plate, the at least three height adjustment members being arranged in a polygonal pattern, and the height adjustment members being extendable and retractable along the vertical direction.

9. The clamping fixture for laser welding of blade cover plates according to claim 8, characterized in that, The adjustable base assembly further includes at least two positioning members, which are located at the bottom of the base plate. In the vertical direction, the length of the positioning member is greater than the maximum length of the height adjustment member. The positioning member is used to cooperate with the positioning hole of the welding platform.

10. The clamping fixture for laser welding of blade cover plates according to claim 1, characterized in that, The horizontal adjustment assembly includes a first direction adjustment platform and a second direction adjustment platform. The first direction adjustment platform is located on top of the adjustable base assembly, and the second direction adjustment platform is located on top of the first direction adjustment platform. The rotation adjustment assembly is located on top of the second direction adjustment platform. The first direction adjustment platform is used to adjust the second direction adjustment platform to move along a first direction, and the second direction adjustment platform is used to adjust the rotation adjustment assembly to move along a second direction. Both the first direction and the second direction are perpendicular to the vertical direction, and the first direction is perpendicular to the second direction.

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