Turbine blade thermal correction mold

Abstract

The utility model relates to the technical field of blade machining, and discloses a steam turbine blade thermal correction mold which comprises an upper connecting block, a lower connecting block and a plurality of supporting plates, the bottom end of the upper connecting block is fixedly connected with an upper mold base plate, and the top end of the lower connecting block is fixedly connected with a lower mold base plate. Two sliding grooves are formed in the side, close to the upper mold base plate, of the lower mold base plate, a groove is formed in the middle of the lower mold base plate, a plurality of fixing discs are fixedly connected to the top end of the interior of the groove, a first strong magnetic block is fixedly connected to the middle of each fixing disc, and a connecting shaft is fixedly connected to the middle of the bottom end of each fixing disc. According to the utility model, the blade can be ensured to be kept at a stable position in the machining process by realizing strong magnetic adsorption, errors caused by vibration or movement are reduced, in addition, the support plate can be quickly adjusted and positioned, and the stability and the precision of the blade in the correction process can be favorably kept.

Description

Technical Field

[0001] This utility model relates to the field of blade processing technology, and in particular to a steam turbine blade thermal straightening mold. Background Technology

[0002] A steam turbine is a rotary power machine that converts steam energy into mechanical work, and it is one of the main components of steam-powered equipment. It is primarily used as a prime mover for power generation, but can also directly drive various pumps, fans, compressors, and ship propellers.

[0003] Steam turbine blades are characterized by being thin, long, and twisted. After heat treatment, they are prone to complex bending and twisting deformations. Currently, for blades with a length of 800mm or more, thermal correction molds are designed to correct the blade deformation.

[0004] In traditional steam turbine blade hot forming processes, mechanical clamps are typically used to fix the blades. This method is not only cumbersome but also prone to errors due to vibration or movement during the forming process, affecting the blade's machining accuracy. Furthermore, the support plates of traditional molds are usually welded and fixed to specific positions on the mold, making it difficult to flexibly adjust the position of the support plates and to dynamically adjust them according to the size and shape of the blades. Therefore, to address these issues, a steam turbine blade hot forming mold is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a steam turbine blade thermal alignment mold, which aims to improve the problems of traditional clamps in the prior art, such as cumbersome fixing, easy errors caused by vibration or movement, and inability to adjust and change the position and type of support plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A steam turbine blade hot forming mold includes an upper connecting block, a lower connecting block, and multiple support plates. An upper mold base plate is fixedly connected to the bottom end of the upper connecting block, and a lower mold base plate is fixedly connected to the top end of the lower connecting block. Two sliding grooves are formed on the side of the lower mold base plate that is close to the upper mold base plate. A groove is formed in the middle of the lower mold base plate. Multiple fixed disks are fixedly connected to the top end of the groove. A strong magnetic block is fixedly connected to the middle of the fixed disk. A connecting shaft is fixedly connected to the middle of the bottom end of the fixed disk. A second strong magnetic block is rotatably connected to the outside of the connecting shaft. Multiple worm gear disks are fixedly connected to the outside of the second strong magnetic block. A worm is rotatably connected to the inner wall of the groove. A knob is fixedly connected to the right side of the worm. Limiting components for fixing the position of the support plates are provided at both ends of the outer side of the support plates.

[0008] As a further description of the above technical solution:

[0009] The limiting component includes two sliders. The top ends of the two sliders on their adjacent sides are fixedly connected to the outside of the support plate. A movable groove is provided in the middle of the slider. A tapered screw is threaded to the top of the inner wall of the slider. A nut is threaded to the outside of the tapered screw. A U-shaped block is slidably connected to the inner wall of the movable groove. A fixed plate is fixedly connected to the end of the U-shaped block away from the support plate. A ball groove is provided at the end of the fixed plate near the U-shaped block. A movable ball is slidably connected to the inner wall of the ball groove.

[0010] As a further description of the above technical solution:

[0011] The upper mold base plate has connecting cylinders fixedly connected to the four corners of its bottom end, and the lower connecting block has connecting rods fixedly connected to the four corners of its top end. The bottom end of the connecting rods is fixedly connected to a rubber sleeve.

[0012] As a further description of the above technical solution:

[0013] The bottom end of the worm gear disk is rotatably connected to the inner wall of the groove, and the outer side of the worm is meshed with the outer side of the worm gear disk.

[0014] As a further description of the above technical solution:

[0015] A connecting hole is provided in the middle of the second strong magnetic block, and the outer part of the connecting shaft is rotatably connected to the inner wall of the connecting hole;

[0016] As a further description of the above technical solution:

[0017] The slider is externally slidably connected to the inner wall of the groove, and the bottom end of the conical screw is externally slidably connected to the outside of the movable ball;

[0018] As a further description of the above technical solution:

[0019] The outside of the fixing plate engages with the inner wall of the slide groove, and each of the four corners of the upper connecting block has a mounting hole.

[0020] As a further description of the above technical solution:

[0021] The connecting rod is externally slidably connected to the inner wall of the connecting cylinder, and each of the four corners of the lower connecting block is provided with a mounting hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by rotating the worm gear to engage the worm wheel, the second strong magnetic block rotates, so that the positive and negative poles of the second strong magnetic block are opposite to those of the first strong magnetic block, generating a strong magnetic field. This enables the strong magnetic adsorption of the blade to ensure that the blade maintains a stable position during processing, reducing errors caused by vibration or movement, thereby improving the processing accuracy of the blade.

[0024] 2. In this utility model, by rotating the conical screw to squeeze the movable ball, the movable ball then squeezes the fixed plate out of the movable groove, thereby realizing the rapid adjustment and positioning of the support plate, which helps to maintain the stability and accuracy of the blade during the calibration process, thereby improving the calibration quality. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a steam turbine blade thermal straightening mold proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the worm gear disk of a steam turbine blade thermal straightening mold proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of a turbine blade thermal straightening mold slider proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of a turbine blade thermal straightening mold fixing plate proposed in this utility model;

[0029] Figure 5 This is an exploded view of the movable ball of a steam turbine blade thermal straightening mold proposed in this utility model.

[0030] Legend:

[0031] 1. Upper connecting block; 2. Lower connecting block; 3. Upper mold base plate; 4. Lower mold base plate; 5. Slide groove; 6. Groove; 7. Fixed plate; 8. Strong magnet one; 9. Connecting shaft; 10. Strong magnet two; 11. Connecting hole; 12. Worm gear; 13. Worm; 14. Knob; 15. Slider; 16. Support plate; 17. Movable groove; 18. Tapered screw; 19. Nut; 20. U-shaped block; 21. Fixed plate; 22. Ball groove; 23. Movable ball; 24. Connecting cylinder; 25. Connecting rod; 26. Rubber sleeve; 27. Mounting hole one; 28. Mounting hole two. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3 This utility model provides an embodiment of a steam turbine blade hot forming mold, comprising an upper connecting block 1, a lower connecting block 2, and multiple support plates 16. The upper connecting block 1 is used to connect to an upper mold base plate 3 and to mount the entire mold on a press. The lower mold base plate 3 is fixedly connected to the bottom end of the upper connecting block 1, providing a connection position for the upper connecting block 1 and cooperating with the lower mold base plate 4 for forming work. The lower mold base plate 4 is fixedly connected to the top end of the lower connecting block 2, providing a connection position for the lower connecting block 2 and cooperating with the upper mold base plate 3 for forming work. Two sliding grooves 5 are formed on the side of the lower mold base plate 4 adjacent to the upper mold base plate 3. The sliding grooves 5 are elongated T-shaped grooves.

[0034] refer to Figure 1 The upper mold base plate 3 has four connecting cylinders 24 fixedly connected to its bottom corners, and the lower connecting block 2 has four connecting rods 25 fixedly connected to its top corners. The connecting rods 25 are slidably connected to the inner wall of the connecting cylinders 24, and the connecting rods 25 and the connecting cylinders 24 cooperate to provide guidance for the downward pressure of the press. A rubber sleeve 26 is fixedly connected to the bottom of the connecting rod 25, and the rubber sleeve 26 provides cushioning and protection against the downward pressure of the connecting cylinders 24. The upper connecting block 1 has mounting holes 27 at each of its four corners, and the upper connecting block 1 is installed on the press with bolts. The lower connecting block 2 has mounting holes 28 at each of its four corners, and the lower connecting block 2 is installed on the press with bolts.

[0035] refer to Figure 2 A groove 6 is formed in the middle of the lower mold base plate 4. The groove 6 is a rectangular recess in the middle of the lower mold base plate 4, with two holes on the left and right sides. Multiple fixing discs 7 are fixedly connected to the top of the interior of the groove 6. The fixing discs 7 fix strong magnetic blocks 8 and provide support for the connecting shaft 9. Strong magnetic blocks 8 are fixedly connected to the middle of the fixing discs 7. Strong magnetic blocks 8 and strong magnetic blocks 10 cooperate to generate magnetic attraction force to fix the blade.

[0036] A connecting shaft 9 is fixedly connected to the center of the bottom of the fixed disk 7, providing rotational support for the second strong magnetic block 10. The second strong magnetic block 10 is rotatably connected to the outside of the connecting shaft 9. The second strong magnetic block 10 changes its relative position with the first strong magnetic block 8 by rotating, generating a magnetic attraction force to fix the workpiece. A connecting hole 11 is opened in the center of the second strong magnetic block 10, and the outside of the connecting shaft 9 is rotatably connected to the inner wall of the connecting hole 11. The connecting hole 11 is opened to allow the second strong magnetic block 10 to rotate around the connecting shaft 9.

[0037] Multiple worm gear disks 12 are fixedly connected to the outside of the strong magnetic block 10. Each worm gear disk 12 has a disc-shaped structure and rotates under the drive of the worm 13, thereby causing the strong magnetic block 10 to rotate. The bottom end of the worm gear disk 12 is rotatably connected to the inner wall of the groove 6, and the worm gear disk 12 rotates stably in contact with the groove 6. The worm 13, a cylindrical shaft, is rotatably connected to the inner wall of the groove 6. The outside of the worm 13 is meshed with the outside of the worm gear disks 12. The rotation of the worm 13 drives the worm gear disks 12 to rotate, thereby controlling the rotation of the strong magnetic block 10. A knob 14 is fixedly connected to the right side of the worm 13 for convenient rotation of the worm 13.

[0038] refer to Figure 3 , Figure 5 The support plate 16 has limiting components at both ends of its outer surface to fix its position. These limiting components include two sliders 15, whose outer surfaces are slidably connected to the inner wall of the groove 5. The top ends of the two sliders 15 on their adjacent sides are fixedly connected to the outside of the support plate 16. The sliders 15 connect to the support plate 16 and slide within the groove 5 to adjust the position of the support plate 16. The support plate 16 is used to place the workpiece and provide support. A movable groove 17 is provided in the middle of the slider 15, providing installation space for components such as the U-shaped block 20, the fixed plate 21, and the movable ball 23.

[0039] A tapered screw 18 is threaded onto the top of the inner wall of the slider 15, and a nut 19 is threaded onto the outer side of the tapered screw 18. The tapered screw 18 is screw-shaped with a tapered head, and the nut 19 is threaded onto its outer side. The nut 19 mates with the tapered screw 18 to fix its position. A U-shaped block 20 is slidably connected to the inner wall of the movable groove 17. The U-shaped block 20 is connected to the fixed plate 21 and slides within the movable groove 17, and the U-shaped block 20 is fitted over the tapered head of the tapered screw 18.

[0040] A fixing plate 21 is fixedly connected to the end of the U-shaped block 20 away from the support plate 16. The outer side of the fixing plate 21 engages with the inner wall of the slide groove 5. Under the pressure of the conical screw 18, the fixing plate 21 protrudes from the inner wall of the movable groove 17, fitting and locking the inner wall of the slide groove 5, thus fixing the position of the support plate 16. A ball groove 22 is provided at the end of the fixing plate 21 near the U-shaped block 20, providing positioning space for the movable ball 23. The movable ball 23 is slidably connected to the inner wall of the ball groove 22. The bottom end of the conical screw 18 is slidably connected to the outside of the movable ball 23. The movable ball 23 transmits pressure under the pressure of the conical screw 18, causing the fixing plate 21 to fit and lock the inner wall of the slide groove 5.

[0041] Working principle: In use, firstly, the upper connecting block 1 and the lower connecting block 2 are installed on the press by bolts through mounting holes 27 and 28 respectively. Then, the support plate 16 is fixedly engaged and slidably inserted into the upper mold base plate 3 and the slide groove 5, which match the slider 15, and into the slider 15 of the lower mold base plate 4, by the slider 15. The number and spacing are adjusted according to the shape of the blades to be shaped. After adjustment, the nut 19 is turned to rotate the conical screw 18 inward into the movable groove 17, so that the conical head of the screw 18 presses against the movable ball 23. The movable ball 23 then presses against the fixed plate 21 through the ball groove 22 of the fixed plate 21, causing the fixed plate 21 to protrude from the inner wall of the movable groove 17 and fit and lock against the inner wall of the slide groove 5. This achieves quick fixation of the position of the support plate 16.

[0042] After the positions of the support plates 16 are fixed, place the blade on the support plate 16 on the lower connecting block 2 at the bottom. After adjusting the position, turn the knob 14 to drive the worm gear 13 to rotate two times. This causes the worm gear 13 to mesh with the multiple worm wheel disks 12 inside the mold base plate 4 and rotate simultaneously, driving the strong magnetic block 10 fixed in the middle to rotate 180 degrees. This makes the positive and negative poles of the strong magnetic block 10 fixed in the middle of the worm wheel disk 12 face the positive and negative poles of the strong magnetic block 8 at the top, generating strong magnetism. This magnetism is transmitted through the iron material of the support plate 16, attracting and fixing the blade placed at the top of the support plate 16 below, ensuring that the blade maintains a stable position during processing.

[0043] Finally, the press is started and the connecting cylinder 24 is aligned with the connecting rod 25 to perform a straight downward pressing and calibration.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steam turbine blade hot-forming mold, comprising an upper connecting block (1), a lower connecting block (2), and multiple support plates (16), characterized in that: The bottom end of the upper connecting block (1) is fixedly connected to the upper mold base plate (3), the top end of the lower connecting block (2) is fixedly connected to the lower mold base plate (4), the lower mold base plate (4) and the upper mold base plate (3) are provided with two sliding grooves (5), the middle part of the lower mold base plate (4) is provided with a groove (6), the top end of the groove (6) is fixedly connected to multiple fixed disks (7), the middle part of the fixed disk (7) is fixedly connected to a strong magnetic block one (8), the middle part of the bottom end of the fixed disk (7) is fixedly connected to a connecting shaft (9), the outside of the connecting shaft (9) is rotatably connected to a strong magnetic block two (10), the outside of the strong magnetic block two (10) is fixedly connected to multiple worm gear disks (12), the inner wall of the groove (6) is rotatably connected to a worm (13), the right side of the worm (13) is fixedly connected to a knob (14), and the two ends of the support plate (16) are provided with limiting components for fixing the position of the support plate (16).

2. The turbine blade hot forming mold according to claim 1, characterized in that: The limiting component includes two sliders (15). The top ends of the two sliders (15) on their adjacent sides are fixedly connected to the outside of the support plate (16). A movable groove (17) is provided in the middle of the slider (15). A tapered screw (18) is threaded to the top of the inner wall of the slider (15). A nut (19) is threaded to the outside of the tapered screw (18). A U-shaped block (20) is slidably connected to the inner wall of the movable groove (17). A fixing plate (21) is fixedly connected to the end of the U-shaped block (20) away from the support plate (16). A ball groove (22) is provided at the end of the fixing plate (21) near the U-shaped block (20). A movable ball (23) is slidably connected to the inner wall of the ball groove (22).

3. The turbine blade hot forming mold according to claim 1, characterized in that: The bottom four corners of the upper mold base plate (3) are fixedly connected with connecting cylinders (24), the top four corners of the lower connecting block (2) are fixedly connected with connecting rods (25), and the bottom of the connecting rods (25) is fixedly connected with rubber sleeves (26).

4. The turbine blade hot forming mold according to claim 1, characterized in that: The bottom end of the worm gear disk (12) is rotatably connected to the inner wall of the groove (6), and the outside of the worm (13) is meshed with the outside of the worm gear disk (12).

5. The turbine blade hot forming mold according to claim 1, characterized in that: A connecting hole (11) is provided in the middle of the strong magnetic block 2 (10), and the external part of the connecting shaft (9) is rotatably connected to the inner wall of the connecting hole (11).

6. The turbine blade hot forming mold according to claim 2, characterized in that: The slider (15) is externally slidably connected to the inner wall of the groove (5), and the bottom end of the cone screw (18) is externally slidably connected to the outside of the movable ball (23).

7. A turbine blade hot-forming mold according to claim 2, characterized in that: The outside of the fixing plate (21) engages with the inner wall of the slide groove (5), and the four corners of the upper connecting block (1) are provided with mounting holes (27).

8. The turbine blade hot forming mold according to claim 3, characterized in that: The connecting rod (25) is externally slidably connected to the inner wall of the connecting cylinder (24), and the lower connecting block (2) has mounting holes (28) at all four corners.

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