A low-pressure turbine blade tenon tooth machining device and method

Abstract

The present invention relates to a low-pressure turbine blade tenon machining device and method, belonging to the technical field of machining. It includes a positioning and machining device. The bottom of the base is fixedly connected to the bottom of the alloy seat, and the top of the alloy seat is detachably connected to the cover plate. The alloy block is located inside the alloy seat. The first pressing assembly and the second pressing assembly are both located at one end of the alloy seat. The second pressing assembly is slidably matched with one end of the alloy seat, and the third pressing assembly is located at the other end of the alloy seat. The beneficial effects are as follows: Adjust the first pressing point where the first pressing assembly presses the blade, adjust the second pressing point where the second pressing assembly presses the blade, adjust the third pressing point and the fourth pressing point where the third pressing assembly presses the blade; Inject resin into the alloy seat through the pouring port, so that the blade and the alloy block are cast and wrapped together to complete the machining of the blade tenon, thereby increasing the stiffness of the blade and improving the surface quality of the blade.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and particularly to a low-pressure turbine blade tenon tooth machining device and method. Background Technique

[0002] In the machining process of low-pressure turbine working blades, the blade tenon teeth are usually machined by the six-point positioning method of the material first, and then the crown and the rest of the parts are machined with the tenon teeth. Among them, due to the characteristics of "slender and thin" of the slender and thin low-pressure turbine working blades, the blades will be deformed by force during the positioning machining process by the six-point positioning method of the material, and it is very difficult to ensure the dimensions of the tenon tooth part. The traditional method for machining the tenon tooth part of such blades is to pour tin-bismuth alloy on the blade body as a positioning block to make up for the problem of the blade body being deformed by force, and then use the tin-bismuth alloy as a positioning to machine the tenon teeth. However, removing the tin-bismuth alloy will leave residues on the blade body, affecting the fatigue performance of the blade and reducing the surface quality of the blade.

[0003] Therefore, a low-pressure turbine blade tenon tooth machining device and method are provided to solve the problems raised in the above background technique. Summary of the Invention

[0004] The technical problem solved by the present invention is how to improve the surface quality of the blade.

[0005] The technical solution for the present invention to solve the above technical problems is as follows: A low-pressure turbine blade tenon tooth machining device includes a positioning machining device. The positioning machining device includes a base, an alloy seat, alloy blocks, a first pressing component, a second pressing component, a third pressing component, and a cover plate. The base is fixedly connected to the bottom of the alloy seat. The top of the alloy seat is detachably connected to the cover plate. A pouring cavity is formed between the alloy seat and the cover plate. The cover plate has a pouring port. The alloy blocks are used to be placed in the pouring cavity. The alloy seat has a first reference positioning point, a second reference positioning point, and a third reference positioning point. The alloy blocks have a first pouring positioning point, a second pouring positioning point, and a third pouring positioning point. The first reference positioning point, the second reference positioning point, and the third reference positioning point are used to be in one-to-one correspondence and abut against the first pouring positioning point, the second pouring positioning point, and the third pouring positioning point on the alloy blocks. The first pressing component and the second pressing component are both located at one end of the alloy seat and are both fixedly connected to the base. The second pressing component is slidably matched with one end of the alloy seat. The third pressing component is located at the other end of the alloy seat and is fixedly connected to the base.

[0006] The beneficial effects of the present invention are as follows: Place the alloy block into the alloy seat on the base, and make the first casting positioning point, the second casting positioning point, and the third casting positioning point on the alloy block correspond to the first reference positioning point, the second reference positioning point, and the third reference positioning point in the alloy seat one by one; then place the blade on the top end face of the alloy block, and make the first positioning point, the second positioning point, and the third positioning point on the blade correspond to the first casting positioning point, the second casting positioning point, and the third casting positioning point on the alloy block one by one;

[0007] Subsequently, adjust the first pressing component to press the first pressing point of the blade, adjust the second pressing component to press the second pressing point of the blade, adjust the third pressing component to press the third pressing point and the fourth pressing point of the blade, press the blade and prevent the blade from shifting; thread-connect the cover plate to the alloy seat, and inject resin into the alloy seat through the casting port, so that the blade and the alloy block are cast and wrapped together to complete the machining of the blade tenon teeth, thereby increasing the stiffness of the blade and improving the surface quality of the blade.

[0008] Based on the above technical solutions, the present invention can be further improved as follows.

[0009] Further, the first pressing component includes a first pressing block, a first fixing block, and a first positioning screw. The first fixing block is located at one end of the alloy seat and is fixedly connected to the base. One end of the first fixing block is rotatably connected to one end of the first pressing block. The other end of the first pressing block is thread-connected to the other end of the first fixing block through the first positioning screw. The side of the first fixing block facing the second pressing component has a second positioning surface.

[0010] The beneficial effect of adopting the above further solution is: After the blade is placed on the top end face of the alloy block, tighten the first positioning screw, so that the other end of the first pressing block moves downward in the vertical direction until the first pressing block abuts against and presses the first pressing point of the blade, and the second positioning surface abuts against and presses the fourth theoretical positioning point of the blade.

[0011] Further, the second pressing component includes a second pressing block, a second fixing block, and a first pressing screw. The second fixing block is located on one side of the first fixing block and is fixedly connected to the base. The side of the second fixing block close to the first fixing block has a first groove. The second pressing block is located in the first groove, and one end of the second pressing block is rotatably connected to the second fixing block. One end of the alloy seat has a sliding groove. The other end of the second pressing block is slidably matched with the sliding groove. The first pressing screw passes through the second fixing block and abuts against the side wall of the second pressing block.

[0012] The beneficial effects of adopting the above further scheme are as follows: After the first pressing point of the blade is pressed, adjust the first pressing screw so that the first pressing screw pushes the second pressing block to rotate towards the first fixing block and slide in the chute until it slides to abut against and press the second pressing point of the blade.

[0013] Further, the third pressing assembly includes a third fixing block, a second pressing screw, a pressing clamp and a pressing head. The third fixing block is located at the other end of the alloy seat and is fixedly connected to the base. One end of the third fixing block is threadedly connected to the second pressing screw, and the other end of the third fixing block is fixedly connected to the pressing clamp. The pressing head is fixed to the end of the pressing clamp.

[0014] The beneficial effects of adopting the above further scheme are as follows: After the first pressing point and the second pressing point of the blade are pressed, adjust the pressing clamp so that the pressing head moves downward in the vertical direction until it moves to abut against and press the third pressing point; and adjust the second pressing screw so that the second pressing screw abuts against and presses the fourth pressing point.

[0015] Further, the positioning and machining device further includes a fourth fixing block. The fourth fixing block is located on one side of the third fixing block and is fixedly connected to the base. A positioning ball is fixed on the fourth fixing block, and a first positioning surface is provided on one side of the fourth fixing block close to the third pressing assembly.

[0016] The beneficial effects of adopting the above further scheme are as follows: The positioning ball on the fourth fixing block can be used to abut against and press the sixth theoretical positioning point of the blade, and the first positioning surface on the fourth fixing block can be used to abut against and press the fifth theoretical positioning point of the blade.

[0017] Further, the positioning and machining device further includes a support assembly. The support assembly includes a support plate, support columns and a fourth spring. The support plate is located between the alloy seat and the base and is fixedly connected to the base. A plurality of support columns are circumferentially spaced apart on the support plate. One end of the support column is fixedly connected to the support plate. The bottom of the alloy seat has a second groove. The other end of the support column passes through the second groove and is slidably connected to the alloy seat. The support column is sleeved with the fourth spring. One end of the fourth spring abuts against the support plate, and the other end of the fourth spring abuts against the bottom of the second groove and applies an elastic force to the alloy seat to make it away from the base.

[0018] The beneficial effects of adopting the above further scheme are as follows: When an external thrust is applied to the bottom of the base, the external thrust applies an upward acting force in the vertical direction to the support plate and the fourth spring, driving the alloy seat to move upward in the vertical direction, and then pushing the processed blade in the alloy seat upward in the vertical direction, facilitating the removal of the processed blade.

[0019] Furthermore, it further includes a measuring device, and the measuring device includes a bottom plate, a first measuring component, a second measuring component, a third measuring component, a first positioning block, a second positioning block, a third positioning block, a fourth positioning block, a fifth positioning block and a sixth positioning block. The first positioning block is fixed in the middle of the bottom plate. The first positioning block has a first measuring positioning point, a second measuring positioning point and a third measuring positioning point. The first measuring positioning point, the second measuring positioning point and the third measuring positioning point are used to respectively and correspondingly abut against the first positioning point, the second positioning point and the third positioning point of the blade. The second positioning block and the third positioning block are respectively located on both sides of the middle of the first positioning block and are fixedly connected to the bottom plate. The first measuring component and the second measuring component are respectively located at both ends of the first positioning block and are fixedly connected to the bottom plate. One end of the first measuring component abuts against one side of the end of one end of the first positioning block. The third measuring component and the fourth positioning block are located on both sides of the end of the first positioning block close to one end of the first measuring component and are fixedly connected to the bottom plate. The fourth positioning block has a third positioning surface on the side close to the first measuring component. One end of the third measuring component abuts against the other side of the end of one end of the first positioning block. The fifth positioning block is located on one side of the second measuring component and is fixedly connected to the bottom plate. A fourth positioning pin is fixed on one side of the fifth positioning block. The sixth positioning block is located on one side of the fifth positioning block and is fixedly connected to the bottom plate. The sixth positioning block has a fourth positioning surface on the side close to the second measuring component.

[0020] The beneficial effects of adopting the above further solution are as follows: The first measuring component, the second measuring component and the third measuring component on the bottom plate can respectively measure the dimensions of the first theoretical positioning point, the third theoretical positioning point and the second theoretical positioning point on the blade. The third positioning surface on the fourth positioning block can abut against and press the fourth theoretical positioning point of the blade. The fourth positioning surface of the sixth positioning block can abut against and press the fifth theoretical positioning point of the blade. The fourth positioning pin of the fifth positioning block can abut against and press the sixth theoretical positioning point of the blade.

[0021] Furthermore, the measuring device further includes a first positioning pin, a second positioning pin and a third positioning pin. Both sides of the end of one end of the first positioning block are respectively in sliding fit with the first positioning pin and the third positioning pin. One side of the second measuring component is in sliding fit with the second positioning pin.

[0022] The beneficial effects of adopting the above further solution are as follows: The second theoretical positioning point of the blade can abut against and press the top of the third positioning pin, causing the third positioning pin to slide downward in the vertical direction; the first theoretical positioning point of the blade can abut against and press the top of the first positioning pin, causing the first positioning pin to slide downward in the vertical direction; the third theoretical positioning point of the blade can abut against and press the top of the second positioning pin, causing the second positioning pin to slide downward in the vertical direction.

[0023] Further, the first measurement assembly includes a first measurement block, a first lever, a first spring, and a first measuring gauge. The first lever passes through the lower part of the first measurement block and is movably connected to the first measurement block. The first measuring gauge passes through one end of the first measurement block and abuts against one end of the first lever. The first positioning pin passes through one side of the end of one end of the first positioning block and abuts against the other end of the first lever. One end of the first spring abuts against the upper part of the other end of the first measurement block, and the other end of the first spring abuts against the other end of the first lever; the second measurement assembly includes a second measurement block, a second lever, a second spring, and a second measuring gauge. The second lever passes through the lower part of the second measurement block and is movably connected to the second measurement block. The second measuring gauge passes through one side of the second measurement block and abuts against one side of the second lever. The second positioning pin passes through the other side of the second measurement block and abuts against the other side of the second lever. One end of the second spring abuts against the upper part of the other side of the second measurement block, and the other end of the second spring abuts against the other side of the second lever; the third measurement assembly includes a third measurement block, a third lever, a third spring, and a third measuring gauge. The third lever passes through the lower part of the third measurement block and is movably connected to the third measurement block. The third measuring gauge passes through one side of the third measurement block and abuts against one side of the third lever. The third positioning pin passes through the other side of the end of one end of the first positioning block and abuts against the other side of the third lever. One end of the third spring abuts against the upper part of the other side of the third measurement block, and the other end of the third spring abuts against the other side of the third lever.

[0024] The beneficial effects of adopting the above further solution are as follows: After the first theoretical positioning point of the blade abuts against and presses the top of the first positioning pin, the first positioning pin moves downward in the vertical direction until it abuts against the first lever, and drives one end of the first lever to move downward in the vertical direction under the action of the first spring. The other end of the first lever moves upward in the vertical direction, and makes the other end of the first lever abut against the first measuring gauge, thereby measuring the dimension of the first theoretical positioning point of the blade;

[0025] After the third theoretical positioning point of the blade abuts against and presses the top of the second positioning pin, the second positioning pin moves downward in the vertical direction until it abuts against the second lever, and drives one end of the second lever to move downward in the vertical direction under the action of the second spring. The other end of the second lever moves upward in the vertical direction and makes the other end of the second lever abut against the second measuring gauge, thereby measuring the dimension of the third theoretical positioning point of the blade;

[0026] After the second theoretical positioning point of the blade abuts against and presses the top of the third positioning pin, the third positioning pin moves downward in the vertical direction until it abuts against the third lever, and drives one end of the third lever to move downward in the vertical direction under the action of the third spring. The other end of the third lever moves upward in the vertical direction and makes the other end of the third lever abut against the third measuring gauge, thereby measuring the dimension of the second theoretical positioning point of the blade.

[0027] The present invention also provides a method for machining the dovetail teeth of a low-pressure turbine blade, comprising the following steps:

[0028] Step 1: Place the unprocessed blade into the measuring device, and make the first positioning point, the second positioning point, and the third positioning point of the blade abut against and be positioned with the measuring device. Then, measure the dimensions of the first theoretical positioning point, the third theoretical positioning point, and the second theoretical positioning point of the blade respectively through the first measuring gauge, the second measuring gauge, and the third measuring gauge, and set the values of the first measuring gauge, the second measuring gauge, and the third measuring gauge to zero;

[0029] Step 2: Place the alloy block into the alloy seat and position it, and then place the blade on the top end face of the alloy block and position it;

[0030] Step 3: Thread the cover plate to the alloy seat, so that the blade and the alloy block are successively located in the casting cavity between the cover plate and the alloy seat from top to bottom; inject the resin into the casting cavity through the casting port, so that the blade and the alloy block are cast and wrapped together, thereby completing the machining of the dovetail teeth of the blade;

[0031] Step 4: Place the processed blade into the measuring device, and make the first positioning point, the second positioning point, and the third positioning point of the blade abut against and be positioned with the measuring device; then measure the dimensional change amounts of the first theoretical positioning point, the third theoretical positioning point, and the second theoretical positioning point on the processed blade respectively through the first measuring gauge, the second measuring gauge, and the third measuring gauge, and judge whether the dimensional change amount of the processed blade is within the preset error range. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the device for machining the dovetail teeth of the low-pressure turbine blade of the present invention;

[0033] Figure 2 Partial structural schematic diagram of the low-pressure turbine blade tenon machining device of the present invention;

[0034] Figure 3 Structural schematic diagram of the cover plate of the present invention;

[0035] Figure 4 Left view of the low-pressure turbine blade tenon machining device of the present invention;

[0036] Figure 5 Top view of the low-pressure turbine blade tenon machining device of the present invention;

[0037] Figure 6 is Figure 5 D-D sectional view of;

[0038] Figure 7 is Figure 6 F-F sectional view of;

[0039] Figure 8 Structural schematic diagram of the alloy seat of the present invention;

[0040] Figure 9 Front view of the alloy block of the present invention;

[0041] Figure 10 Bottom view of the alloy block of the present invention;

[0042] Figure 11 One of the structural schematic diagrams of the blade of the present invention;

[0043] Figure 12 Another structural schematic diagram of the blade of the present invention;

[0044] Figure 13 Another structural schematic diagram of the blade of the present invention;

[0045] Figure 14 One of the partial schematic diagrams of the low-pressure turbine blade tenon machining device of the present invention;

[0046] Figure 15 Another partial schematic diagram of the low-pressure turbine blade tenon machining device of the present invention;

[0047] Figure 16 Structural schematic diagram of the measuring device of the present invention;

[0048] Figure 17 One of the partial schematic diagrams of the measuring device of the present invention;

[0049] Figure 18 Another partial schematic diagram of the measuring device of the present invention;

[0050] Figure 19 Another partial schematic diagram of the measuring device of the present invention;

[0051] Figure 20 This is the fourth partial schematic diagram of the measuring device of the present invention.

[0052] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0053] 1. Base; 2. Alloy seat; 201. Chute; 3. Alloy block; 4. First pressing assembly; 401. First pressing block; 402. First fixing block; 403. First positioning screw; 404. Positioning nut; 405. Second positioning surface; 5. Second pressing assembly; 501. Second pressing block; 502. Second fixing block; 503. First pressing screw; 6. Third pressing assembly; 601. Third fixing block; 602. Second pressing screw; 603. Pressing clamp; 604. Pressing head; 7. Cover plate; 701. Pouring port; 8. Fourth fixing block; 801. Positioning ball; 802. First positioning surface; 9. Support assembly; 901. Support plate; 902. Support column; 903. Fourth spring; 904. Top block; 10. Measuring device; 101. Bottom plate; 102. First measuring assembly; 1021. First measuring block; 1022. First lever; 1023. First spring; 1024. First measuring gauge; 103. Second measuring assembly; 1031. Second measuring block; 1032. Second lever; 1033. Second spring; 1034. Second measuring gauge; 104. Third measuring assembly; 1041. Third measuring block; 1042. Third lever; 1043. Third spring; 1044. Third measuring gauge; 105. First positioning block; 106. Second positioning block; 1061. Second positioning screw; 107. Third positioning block; 1071. Third positioning screw; 108. Fourth positioning surface; 109. Fourth positioning block; 1091. Third positioning surface; 110. Fifth positioning block; 111. Sixth positioning block; 112. Third positioning pin; 113. First positioning pin; 114. Second positioning pin; 115. Fourth positioning pin; 11. Blade; 12. Positioning and machining device; 13. First reference positioning point; 14. Second reference positioning point; 15. Third reference positioning point; 16. First pouring positioning point; 17. Second pouring positioning point; 18. Third pouring positioning point; 19. First theoretical positioning point; 20. Second theoretical positioning point; 21. Third theoretical positioning point; 22. First positioning point; 23. Second positioning point; 24. Third positioning point; 25. First measuring positioning point; 26. Second measuring positioning point; 27. Third measuring positioning point; 28. Fourth theoretical positioning point; 29. Fifth theoretical positioning point; 30. Sixth theoretical positioning point; 31. First pressing point; 32. Second pressing point; 33. Third pressing point; 34. Fourth pressing point; 35. Fifth pressing point; 36. Sixth pressing point. Detailed implementation manners

[0054] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0055] As Figure 13 shown, the blade 11 (standard part) has a first theoretical positioning point 19, a second theoretical positioning point 20, a third theoretical positioning point 21, a fourth theoretical positioning point 28, a fifth theoretical positioning point 29 and a sixth theoretical positioning point 30. Among them, the first theoretical positioning point 19 and the second theoretical positioning point 20 are located on the back extension section of the blade, the third theoretical positioning point 21 is located on the back blade body, the fourth theoretical positioning point 28 is located on the trailing edge flange of the blade, the fifth theoretical positioning point 29 is located on the trailing edge shroud of the blade, and the sixth theoretical positioning point 30 is located on the lower surface of the back shroud of the blade; the blade 11 (standard part) also has a first positioning point 22, a second positioning point 23 and a third positioning point 24.

[0056] Among them, the first positioning point 22, the second positioning point 23 and the third positioning point 24 of the blade 11 are located between the first theoretical positioning point 19, the second theoretical positioning point 20 and the third theoretical positioning point 21 of the blade 11, and are arranged on the concave blade body of the blade 11. One side of the first positioning point 22 and the second positioning point 23 of the blade 11 is close to the concave extension section of the blade and is arranged at intervals, and the third positioning point 24 of the blade 11 is close to the other side of the first positioning point 22 and the second positioning point 23.

[0057] As Figure 11 shown, are the positions of the first pressing point 31, the second pressing point 32, the third pressing point 33 and the fourth pressing point 34 of the blade 11.

[0058] As Figures 1 - 20As shown in the figure, this embodiment provides a low-pressure turbine blade tenon machining device, including a positioning and machining device 12. The positioning and machining device 12 includes a base 1, an alloy seat 2, an alloy block 3, a first pressing component 4, a second pressing component 5, a third pressing component 6, and a cover plate 7. The base 1 is fixedly connected to the bottom of the alloy seat 2. The top of the alloy seat 2 is detachably connected to the cover plate 7. A casting cavity is formed between the alloy seat 2 and the cover plate 7. The cover plate 7 has a casting port 701. The alloy block 3 is used to be placed in the casting cavity. The alloy seat 2 has a first reference positioning point 13, a second reference positioning point 14, and a third reference positioning point 15. The alloy block 3 has a first casting positioning point 16, a second casting positioning point 17, and a third casting positioning point 18. The first reference positioning point 13, the second reference positioning point 14, and the third reference positioning point 15 are used to be in one-to-one correspondence and abut against the first casting positioning point 16, the second casting positioning point 17, and the third casting positioning point 18 on the alloy block 3. The first pressing component 4 and the second pressing component 5 are both located at one end of the alloy seat 2 and are both fixedly connected to the base 1. The second pressing component 5 is slidably matched with one end of the alloy seat 2. The third pressing component 6 is located at the other end of the alloy seat 2 and is fixedly connected to the base 1.

[0059] Place the alloy block 3 into the alloy seat 2 on the base 1, and make the first casting positioning point 16, the second casting positioning point 17, and the third casting positioning point 18 on the alloy block 3 correspond to the first reference positioning point 13, the second reference positioning point 14, and the third reference positioning point 15 in the alloy seat 2 in terms of position one by one; then place the blade 11 on the top end face of the alloy block 3, and make the first positioning point 22, the second positioning point 23, and the third positioning point 24 on the blade 11 correspond to the first casting positioning point 16, the second casting positioning point 17, and the third casting positioning point 18 on the alloy block 3 in terms of position one by one;

[0060] Subsequently, adjust the first pressing component 4 to press the first pressing point 31 of the blade 11, adjust the second pressing component 5 to press the second pressing point 32 of the blade 11, adjust the third pressing component 6 to press the third pressing point 33 and the fourth pressing point 34 of the blade 11, press the blade 11 and make the blade 11 not shift; thread the cover plate 7 onto the alloy seat 2, and inject resin into the alloy seat 2 through the casting port 701, so that the blade 11 and the alloy block 3 are cast and wrapped together to complete the machining of the blade tenon, in order to increase the stiffness of the blade 11 and improve the surface quality of the blade 11.

[0061] As Figure 8 shown, the alloy seat 2 has a cavity inside, and the bottom of the cavity has the first reference positioning point 13, the second reference positioning point 14, and the third reference positioning point 15 at intervals. As Figure 10As shown, the bottom of the alloy block 3 is provided with a first casting positioning point 16, a second casting positioning point 17, and a third casting positioning point 18, and both ends of the alloy block 3 have openings.

[0062] Among them, as Figure 12 shown, the first theoretical positioning point 19, the second theoretical positioning point 20, and the third theoretical positioning point 21 of the blade 11 are converted into the first positioning point 22, the second positioning point 23, and the third positioning point 24 of the blade 11. By positioning the first casting positioning point 16, the second casting positioning point 17, and the third casting positioning point 18 of the alloy block 3, the blade 11 is further positioned, realizing the conversion of the positioning reference point of the blade 11.

[0063] In addition, handles are provided on both sides of the cover plate 7 for easy operation by the staff, and handles are also provided on both sides of the base 1.

[0064] Specifically, the two sides of the top of the alloy seat 2 are threadedly connected to the cover plate 7.

[0065] Among them, in this embodiment, the pouring port 701 is a rectangular through-hole, and according to the actual situation, the pouring port 701 can also be set to other shapes, such as a square.

[0066] In addition, the first pressing assembly 4, the second pressing assembly 5, and the third pressing assembly 6 are all bolted to the base 1.

[0067] On the basis of the above solution, the first pressing assembly 4 includes a first pressing block 401, a first fixing block 402, and a first positioning screw 403. The first fixing block 402 is located at one end of the alloy seat 2 and is fixedly connected to the base 1. One end of the first fixing block 402 is rotatably connected to one end of the first pressing block 401. The other end of the first pressing block 401 is threadedly connected to the other end of the first fixing block 402 through the first positioning screw 403. The side of the first fixing block 402 facing the second pressing assembly 5 has a second positioning surface 405.

[0068] After the blade 11 is placed on the top end face of the alloy block 3, the first positioning screw 403 is tightened, so that the other end of the first pressing block 401 moves downward in the vertical direction until the first pressing block 401 abuts and presses the first pressing point 31 of the blade 11, and the second positioning surface 405 abuts and presses the fourth theoretical positioning point 28 of the blade 11.

[0069] Specifically, it further includes a positioning nut 404. The bottom of the first positioning screw 403 is fixedly connected to the first fixing block 402. The top of the first positioning screw 403 passes through the other end of the first pressing block 401 and is threadedly connected to the positioning nut 404. Among them, the positioning nut 404 can be a butterfly nut.

[0070] Among them, the first fixing block 402 is fixedly connected to the base 1 by bolts.

[0071] On the basis of the above solution, the second pressing assembly 5 includes a second pressing block 501, a second fixing block 502 and a first pressing screw 503. The second fixing block 502 is located on one side of the first fixing block 402 and is fixedly connected to the base 1. The side of the second fixing block 502 close to the first fixing block 402 has a first groove. The second pressing block 501 is located in the first groove, and one end of the second pressing block 501 is rotatably connected to the second fixing block 502. One end of the alloy seat 2 has a chute 201, and the other end of the second pressing block 501 is slidably engaged with the chute 201. The first pressing screw 503 passes through the second fixing block 502 and abuts against the side wall of the second pressing block 501.

[0072] After the first pressing point 31 of the blade 11 is pressed, adjust the first pressing screw 503 so that the first pressing screw 503 pushes the second pressing block 501 to rotate towards the first fixing block 402 and slide in the chute 201 until it slides to abut against and press the second pressing point 32 of the blade 11.

[0073] Specifically, the first pressing screw 503 is threadedly connected to the second fixing block 502. Tightening the first pressing screw 503 can push the second fixing block 502 to move towards the first fixing block 402, and loosening the first pressing screw 503 can push the second fixing block 502 to move away from the first fixing block 402.

[0074] In addition, the second fixing block 502 is fixedly connected to the base 1 by threads. The first fixing block 402 and the second fixing block 502 are arranged side by side.

[0075] On the basis of the above solution, the third pressing assembly 6 includes a third fixing block 601, a second pressing screw 602, a pressing clamp 603 and a pressing head 604. The third fixing block 601 is located at the other end of the alloy seat 2 and is fixedly connected to the base 1. One end of the third fixing block 601 is threadedly connected to the second pressing screw 602, and the other end of the third fixing block 601 is fixedly connected to the pressing clamp 603. The pressing head 604 is fixed to the end of the pressing clamp 603.

[0076] After the first pressing point 31 and the second pressing point 32 of the blade 11 are pressed, adjust the pressing clamp 603 so that the pressing head 604 moves downward in the vertical direction until it moves to abut against and press the third pressing point 33; and adjust the second pressing screw 602 so that the second pressing screw 602 abuts against and presses the fourth pressing point 34.

[0077] Specifically, a pressing clamp 603 is fixed to the top of one end of the third fixing block 601. By tightening or loosening the second pressing screw 602, the second pressing screw 602 can be made to abut against or away from the blade 11.

[0078] Among them, the third fixing block 601 is fixedly connected to the base 1 by threading.

[0079] In addition, the pressure head 604 is located above the third pressing point 33.

[0080] On the basis of the above solution, the positioning and machining device 12 further includes a fourth fixing block 8. The fourth fixing block 8 is located on one side of the third fixing block 601 and is fixedly connected to the base 1. A positioning ball 801 is fixed to the fourth fixing block 8. The fourth fixing block 8 has a first positioning surface 802 on the side close to the third pressing assembly 6.

[0081] The positioning ball 801 on the fourth fixing block 8 can be used to abut against and press the sixth theoretical positioning point 30 of the blade 11, and the first positioning surface 802 on the fourth fixing block 8 can be used to abut against and press the fifth theoretical positioning point 29 of the blade 11.

[0082] Specifically, the fourth fixing block 8 has a positioning ball 801 at the end away from the alloy seat 2.

[0083] Among them, the third fixing block 601 and the fourth fixing block 8 are arranged side by side.

[0084] On the basis of the above solution, the positioning and machining device 12 further includes a support assembly 9. The support assembly 9 includes a support plate 901, support columns 902 and a fourth spring 903. The support plate 901 is located between the alloy seat 2 and the base 1 and is fixedly connected to the base 1. A plurality of the support columns 902 are circumferentially spaced apart along the support plate 901. One end of the support column 902 is fixedly connected to the support plate 901. The bottom of the alloy seat 2 has a second groove. The other end of the support column 902 passes through the second groove and is slidably connected to the alloy seat 2. The fourth spring 903 is sleeved outside the support column 902. One end of the fourth spring 903 abuts against the support plate 901, and the other end of the fourth spring 903 abuts against the bottom of the second groove and applies an elastic force to the alloy seat 2 to make it away from the base 1.

[0085] When an external thrust is applied to the bottom of the base 1, the external thrust applies an upward acting force in the vertical direction to the support plate 901 and the fourth spring 903, driving the alloy seat 2 to move upward in the vertical direction, and further pushing the processed blade 11 in the alloy seat 2 upward in the vertical direction, facilitating the removal of the processed blade 11.

[0086] Specifically, the bottom of the alloy seat 2 has a third groove, and the support assembly 9 is located in the cavity formed by the third groove and the base 1.

[0087] In this example, there are also two top blocks 904. The top blocks 904 are located between the two support columns 902. One end of the top block 904 is fixedly connected to the support plate 901, and the other end of the top block 904 is fixedly connected to the bottom of the alloy seat 2.

[0088] In addition, during use, the base 1 of the positioning and machining device 12 can be placed on a plane, and when needed, an external force can be applied to the base 1.

[0089] On the basis of the above solution, there is also a measuring device 10. The measuring device 10 includes a bottom plate 101, a first measuring assembly 102, a second measuring assembly 103, a third measuring assembly 104, a first positioning block 105, a second positioning block 106, a third positioning block 107, a fourth positioning block 109, a fifth positioning block 110, and a sixth positioning block 111. The first positioning block 105 is fixedly installed in the middle of the bottom plate 101. The first positioning block 105 has a first measuring positioning point 25, a second measuring positioning point 26, and a third measuring positioning point 27. The first measuring positioning point 25, the second measuring positioning point 26, and the third measuring positioning point 27 are used to abut against the first positioning point 22, the second positioning point 23, and the third positioning point 24 of the blade 11 in a one-to-one correspondence. The second positioning block 106 and the third positioning block 107 are respectively located on both sides of the middle of the first positioning block 105 and are fixedly connected to the bottom plate 101. The first measuring assembly 102 and the second measuring assembly 103 are respectively located at both ends of the first positioning block 105 and are fixedly connected to the bottom plate 101. One end of the first measuring assembly 102 abuts against one side of the end of one end of the first positioning block 105. The third measuring assembly 104 and the fourth positioning block 109 are located on both sides of the end of the first positioning block 105 close to one end of the first measuring assembly 102 and are fixedly connected to the bottom plate 101. The side of the fourth positioning block 109 close to the first measuring assembly 102 has a third positioning surface 1091. One end of the third measuring assembly 104 abuts against the other side of the end of one end of the first positioning block 105. The fifth positioning block 110 is located on one side of the second measuring assembly 103 and is fixedly connected to the bottom plate 101. A fourth positioning pin 115 is fixedly installed on one side of the fifth positioning block 110. The sixth positioning block 111 is located on one side of the fifth positioning block 110 and is fixedly connected to the bottom plate 101. The side of the sixth positioning block 111 close to the second measuring assembly 103 has a fourth positioning surface 108.

[0090] The first measuring component 102, the second measuring component 103, and the third measuring component 104 on the bottom plate 101 can respectively measure the dimensions of the first theoretical positioning point 19, the third theoretical positioning point 21, and the second theoretical positioning point 20 on the blade 11. The third positioning surface 1091 on the fourth positioning block 109 can abut against and press the fourth theoretical positioning point 28 of the blade 11. The fourth positioning surface 108 of the sixth positioning block 111 can abut against and press the fifth theoretical positioning point 29 of the blade 11. The fourth positioning pin 115 of the fifth positioning block 110 can abut against and press the sixth theoretical positioning point 30 of the blade 11.

[0091] Specifically, as Figure 18 shown, the third positioning surface 1091 is located on the side of the fourth positioning block 109 facing the third measuring component 104. The fourth positioning surface 108 is located on the side of the sixth positioning block 111 facing the second measuring component 103. The fourth positioning pin 115 is located on the side of the fifth positioning block 110 away from the first measuring component 102.

[0092] Among them, a second positioning screw 1061 is screwed to the second positioning block 106, and a third positioning screw 1071 is threaded to the third positioning block 107. As Figure 11 shown, by tightening the second positioning screw 1061, the second positioning screw 1061 can abut against and press the sixth pressing point 36 of the blade 11. By tightening the third positioning screw 1071, the third positioning screw 1071 can abut against and press the fifth pressing point 35 of the blade 11, improving the positioning accuracy of the blade 11.

[0093] In addition, as Figure 17 shown, the top of the first positioning block 105 has a first measuring positioning point 25, a second measuring positioning point 26, and a third measuring positioning point 27, which correspond one-to-one to the first positioning point 22, the second positioning point 23, and the third positioning point 24 on the blade 11, improving the positioning accuracy of the blade 11 and preventing displacement.

[0094] On the basis of the above solution, the measuring device 10 further includes a first positioning pin 113, a second positioning pin 114, and a third positioning pin 112. Both sides of one end of the first positioning block 105 are respectively in sliding fit with the first positioning pin 113 and the third positioning pin 112, and one side of the second measuring component 103 is in sliding fit with the second positioning pin 114.

[0095] The second theoretical positioning point 20 of the blade 11 can abut against and press the top of the third positioning pin 112, causing the third positioning pin 112 to slide downward in the vertical direction; the first theoretical positioning point 19 of the blade 11 can abut against and press the top of the first positioning pin 113, causing the first positioning pin 113 to slide downward in the vertical direction; the third theoretical positioning point 21 of the blade 11 can abut against and press the top of the second positioning pin 114, causing the second positioning pin 114 to slide downward in the vertical direction.

[0096] Specifically, sleeves are arranged at intervals on the tops of both sides of one end of the first positioning block 105, and the first positioning pin 113 and the second positioning pin 114 respectively pass through the sleeves and are slidably connected to the first positioning block 105.

[0097] Based on the above solution, the first measurement component 102 includes a first measurement block 1021, a first lever 1022, a first spring 1023 and a first measuring gauge 1024. The first lever 1022 passes through the lower part of the first measurement block 1021 and is movably connected to the first measurement block 1021. The first measuring gauge 1024 passes through one end of the first measurement block 1021 and abuts against one end of the first lever 1022. The first positioning pin 113 passes through one side of the end of the first positioning block 105 and abuts against the other end of the first lever 1022. One end of the first spring 1023 abuts against the upper part of the other end of the first measurement block 1021, and the other end of the first spring 1023 abuts against the other end of the first lever 1022; The second measurement component 103 includes a second measurement block 1031, a second lever 1032, a second spring 1033 and a second measuring gauge 1034. The second lever 1032 passes through the lower part of the second measurement block 1031 and is movably connected to the second measurement block 1031. The second measuring gauge 1034 passes through one side of the second measurement block 1031 and abuts against one side of the second lever 1032. The second positioning pin 114 passes through the other side of the second measurement block 1031 and abuts against the other side of the second lever 1032. One end of the second spring 1033 abuts against the upper part of the other side of the second measurement block 1031, and the other end of the second spring 1033 abuts against the other side of the second lever 1032; The third measurement component 104 includes a third measurement block 1041, a third lever 1042, a third spring 1043 and a third measuring gauge 1044. The third lever 1042 passes through the lower part of the third measurement block 1041 and is movably connected to the third measurement block 1041. The third measuring gauge 1044 passes through one side of the third measurement block 1041 and abuts against one side of the third lever 1042. The third positioning pin 112 passes through the other side of the end of the first positioning block 105 and abuts against the other side of the third lever 1042. One end of the third spring 1043 abuts against the upper part of the other side of the third measurement block 1041, and the other end of the third spring 1043 abuts against the other side of the third lever 1042.

[0098] After the first theoretical positioning point 19 of the blade 11 abuts against and presses the top of the first positioning pin 113, the first positioning pin 113 moves downward in the vertical direction until it abuts against the first lever 1022, and drives one end of the first lever 1022 to move downward in the vertical direction under the action of the first spring 1023. The other end of the first lever 1022 moves upward in the vertical direction, and makes the other end of the first lever 1022 abut against the first measuring gauge 1024, thereby measuring the size of the first theoretical positioning point 19 of the blade 11;

[0099] After the third theoretical positioning point 21 of the blade 11 abuts against and presses the top of the second positioning pin 114, the second positioning pin 114 moves downward in the vertical direction until it abuts against the second lever 1032, and drives one end of the second lever 1032 to move downward in the vertical direction under the action of the second spring 1033. The other end of the second lever 1032 moves upward in the vertical direction, and makes the other end of the second lever 1032 abut against the second measuring gauge 1034, thereby measuring the dimension of the third theoretical positioning point 21 of the blade 11;

[0100] After the second theoretical positioning point 20 of the blade 11 abuts against and presses the top of the third positioning pin 112, the third positioning pin 112 moves downward in the vertical direction until it abuts against the third lever 1042, and drives one end of the third lever 1042 to move downward in the vertical direction under the action of the third spring 1043. The other end of the third lever 1042 moves upward in the vertical direction, and makes the other end of the third lever 1042 abut against the third measuring gauge 1044, thereby measuring the dimension of the second theoretical positioning point 20 of the blade 11.

[0101] This embodiment also provides a method for machining the dovetail teeth of a low-pressure turbine blade, including the following steps:

[0102] Step 1: Place the unprocessed blade 11 into the measuring device 10, and make the first positioning point 22, the second positioning point 23 and the third positioning point 24 of the blade 11 abut against and be positioned with the measuring device 10. Then, respectively measure the dimensions of the first theoretical positioning point 19, the third theoretical positioning point 21 and the second theoretical positioning point 20 of the blade 11 through the first measuring gauge 1024, the second measuring gauge 1034 and the third measuring gauge 1044, and set the values of the first measuring gauge 1024, the second measuring gauge 1034 and the third measuring gauge 1044 to zero;

[0103] Step 2: Place the alloy block 3 into the alloy seat 2 and position it, and then place the blade 11 on the top end face of the alloy block 3 and position it;

[0104] Step 3: Thread the cover plate 7 onto the alloy seat 2, so that the blade 11 and the alloy block 3 are successively located in the casting cavity between the cover plate 7 and the alloy seat 2 from top to bottom; inject resin into the casting cavity through the pouring port 701, so that the blade 11 and the alloy block 3 are cast and wrapped together, thereby completing the machining of the blade dovetail teeth.

[0105] Step 4: Place the processed blade 11 into the measuring device 10, and make the first positioning point 22, the second positioning point 23, and the third positioning point 24 of the blade 11 abut against and be positioned with the measuring device 10; then respectively measure the dimensional change amounts of the first theoretical positioning point 19, the third theoretical positioning point 21, and the second theoretical positioning point 20 on the processed blade 11 through the first measuring gauge 1024, the second measuring gauge 1034, and the third measuring gauge 1044, and determine whether the dimensional change amount of the processed blade 11 is within the preset error range.

[0106] Specifically, if the dimensional change amounts of the first theoretical positioning point 19, the third theoretical positioning point 21, and the second theoretical positioning point 20 on the processed blade 11 are compared with those of the first theoretical positioning point 19, the third theoretical positioning point 21, and the second theoretical positioning point 20 on the unprocessed blade 11, and the difference is within the preset range, then the processed blade 11 is a qualified product; if not, then the processed blade 11 is a defective product.

[0107] Among them, in step 2, before the alloy block 3 is placed into the alloy seat 2, a release agent can be sprayed into the alloy seat 2 to facilitate the removal of the blade 11 after the blade 11 is processed.

[0108] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0109] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0110] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0111] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0112] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0113] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A low-pressure turbine blade tenon tooth machining device, characterized in that, Comprising a positioning and machining device (12), the positioning and machining device (12) includes a base (1), an alloy seat (2), an alloy block (3), a first pressing assembly (4), a second pressing assembly (5), a third pressing assembly (6) and a cover plate (7). The base (1) is fixedly connected to the bottom of the alloy seat (2). The top of the alloy seat (2) is detachably connected to the cover plate (7). A casting cavity is formed between the alloy seat (2) and the cover plate (7). The cover plate (7) has a casting port (701). The alloy block (3) is for being placed in the casting cavity. The alloy seat (2) has a first reference positioning point (13), a second reference positioning point (14) and a third reference positioning point (15). The alloy block (3) has a first casting positioning point (16), a second casting positioning point (17) and a third casting positioning point (18). The first reference positioning point (13), the second reference positioning point (14) and the third reference positioning point (15) are used to abut against the first casting positioning point (16), the second casting positioning point (17) and the third casting positioning point (18) on the alloy block (3) in a one-to-one correspondence. The first pressing assembly (4) and the second pressing assembly (5) are both located at one end of the alloy seat (2) and are both fixedly connected to the base (1). The second pressing assembly (5) is slidably engaged with one end of the alloy seat (2). The third pressing assembly (6) is located at the other end of the alloy seat (2) and is fixedly connected to the base (1); Further included is a measuring device (10), which comprises a bottom plate (101), a first measuring assembly (102), a second measuring assembly (103), a third measuring assembly (104), a first positioning block (105), a second positioning block (106), a third positioning block (107), a fourth positioning block (109), a fifth positioning block (110) and a sixth positioning block (111). The first positioning block (105) is fixed in the middle of the bottom plate (101). The first positioning block (105) has a first measuring positioning point (25), a second measuring positioning point (26) and a third measuring positioning point (27). The first measuring positioning point (25), the second measuring positioning point (26) and the third measuring positioning point (27) are used to abut against the first positioning point (22), the second positioning point (23) and the third positioning point (24) of the blade (11) in a one-to-one correspondence. The second positioning block (106) and the third positioning block (107) are respectively located on both sides of the middle of the first positioning block (105) and are fixedly connected to the bottom plate (101). The first measuring assembly (102) and the second measuring assembly (103) are respectively located at both ends of the first positioning block (105) and are fixedly connected to the bottom plate (101). One end of the first measuring assembly (102) abuts against one side of the end of one end of the first positioning block (105). The third measuring assembly (104) and the fourth positioning block (109) are located on both sides of the end of the first positioning block (105) close to one end of the first measuring assembly (102) and are fixedly connected to the bottom plate (101). The side of the fourth positioning block (109) close to the first measuring assembly (102) has a third positioning surface (1091). One end of the third measuring assembly (104) abuts against the other side of the end of one end of the first positioning block (105). The fifth positioning block (110) is located on one side of the second measuring assembly (103) and is fixedly connected to the bottom plate (101). A fourth positioning pin (115) is fixed on one side of the fifth positioning block (110). The sixth positioning block (111) is located on one side of the fifth positioning block (110) and is fixedly connected to the bottom plate (101). The side of the sixth positioning block (111) close to the second measuring assembly (103) has a fourth positioning surface (108); Convert the first theoretical positioning point (19), the second theoretical positioning point (20) and the third theoretical positioning point (21) of the blade (11) into the first positioning point (22), the second positioning point (23) and the third positioning point (24) of the blade (11); One side of the first positioning point (22) and the second positioning point (23) of the blade (11) is close to the blade basin extension section and is spaced apart. The third positioning point (24) of the blade (11) is close to the other side of the first positioning point (22) and the second positioning point (23).

2. The low-pressure turbine blade tenon tooth processing device according to claim 1, characterized in that, The first pressing assembly (4) includes a first pressing block (401), a first fixing block (402) and a first positioning screw (403). The first fixing block (402) is located at one end of the alloy seat (2) and is fixedly connected to the base (1). One end of the first fixing block (402) is rotatably connected to one end of the first pressing block (401). The other end of the first pressing block (401) is threadedly connected to the other end of the first fixing block (402) through the first positioning screw (403). The side of the first fixing block (402) facing the second pressing assembly (5) has a second positioning surface (405).

3. The low-pressure turbine blade tenon tooth processing device according to claim 2, characterized in that, The second pressing assembly (5) includes a second pressing block (501), a second fixing block (502) and a first pressing screw (503). The second fixing block (502) is located on one side of the first fixing block (402) and is fixedly connected to the base (1). The side of the second fixing block (502) close to the first fixing block (402) has a first groove. The second pressing block (501) is located in the first groove, and one end of the second pressing block (501) is rotatably connected to the second fixing block (502). One end of the alloy seat (2) has a chute (201). The other end of the second pressing block (501) is slidably engaged with the chute (201). The first pressing screw (503) passes through the second fixing block (502) and abuts against the side wall of the second pressing block (501).

4. The low-pressure turbine blade dovetail machining device according to claim 1, characterized in that, The third pressing assembly (6) includes a third fixing block (601), a second pressing screw (602), a pressing clamp (603) and a pressing head (604). The third fixing block (601) is located at the other end of the alloy seat (2) and is fixedly connected to the base (1). One end of the third fixing block (601) is threadedly connected to the second pressing screw (602). The other end of the third fixing block (601) is fixedly connected to the pressing clamp (603). The pressing head (604) is fixed to the end of the pressing clamp (603).

5. The machining device for the dovetail of a low-pressure turbine blade according to claim 4, characterized in that, The positioning and machining device (12) further includes a fourth fixing block (8). The fourth fixing block (8) is located on one side of the third fixing block (601) and is fixedly connected to the base (1). A positioning ball (801) is fixed on the fourth fixing block (8). The side of the fourth fixing block (8) close to the third pressing assembly (6) has a first positioning surface (802).

6. The low-pressure turbine blade dovetail machining device according to claim 1, characterized in that, The positioning and machining device (12) further includes a support assembly (9), and the support assembly (9) includes a support plate (901), support columns (902) and a fourth spring (903). The support plate (901) is located between the alloy seat (2) and the base (1) and is fixedly connected to the base (1). A plurality of the support columns (902) are circumferentially and spacedly distributed along the support plate (901). One end of each support column (902) is fixedly connected to the support plate (901). The bottom of the alloy seat (2) has a second groove. The other end of the support column (902) passes through the second groove and is slidably connected to the alloy seat (2). The fourth spring (903) is sleeved outside the support column (902). One end of the fourth spring (903) abuts against the support plate (901), and the other end of the fourth spring (903) abuts against the bottom of the second groove and applies an elastic force to the alloy seat (2) to make it away from the base (1).

7. The low-pressure turbine blade tenon tooth processing device according to claim 1, wherein, The measuring device (10) further includes a first positioning pin (113), a second positioning pin (114) and a third positioning pin (112). The two sides of one end of the first positioning block (105) are respectively in sliding fit with the first positioning pin (113) and the third positioning pin (112). One side of the second measuring assembly (103) is in sliding fit with the second positioning pin (114).

8. The low-pressure turbine blade tenon tooth machining device according to claim 7, characterized in that, The first measurement component (102) includes a first measurement block (1021), a first lever (1022), a first spring (1023), and a first measuring gauge (1024). The first lever (1022) passes through the lower part of the first measurement block (1021) and is movably connected to the first measurement block (1021). The first measuring gauge (1024) passes through one end of the first measurement block (1021) and abuts against one end of the first lever (1022). The first positioning pin (113) passes through one side of the end of the first positioning block (105) and abuts against the other end of the first lever (1022). One end of the first spring (1023) abuts against the upper part of the other end of the first measurement block (1021), and the other end of the first spring (1023) abuts against the other end of the first lever (1022); The second measurement component (103) includes a second measurement block (1031), a second lever (1032), a second spring (1033), and a second measuring gauge (1034). The second lever (1032) passes through the lower part of the second measurement block (1031) and is movably connected to the second measurement block (1031). The second measuring gauge (1034) passes through one side of the second measurement block (1031) and abuts against one side of the second lever (1032). The second positioning pin (114) passes through the other side of the second measurement block (1031) and abuts against the other side of the second lever (1032). One end of the second spring (1033) abuts against the upper part of the other side of the second measurement block (1031), and the other end of the second spring (1033) abuts against the other side of the second lever (1032); The third measurement component (104) includes a third measurement block (1041), a third lever (1042), a third spring (1043), and a third measuring gauge (1044). The third lever (1042) passes through the lower part of the third measurement block (1041) and is movably connected to the third measurement block (1041). The third measuring gauge (1044) passes through one side of the third measurement block (1041) and abuts against one side of the third lever (1042). The third positioning pin (112) passes through the other side of the end of the first positioning block (105) and abuts against the other side of the third lever (1042). One end of the third spring (1043) abuts against the upper part of the other side of the third measurement block (1041), and the other end of the third spring (1043) abuts against the other side of the third lever (1042).

9. A method for machining the dovetail teeth of a low-pressure turbine blade, which is realized by using the low-pressure turbine blade dovetail tooth machining device described in claim 8, characterized in that, Including the following steps: Step 1: Place the unprocessed blade (11) into the measuring device (10), and make the first positioning point (22), the second positioning point (23), and the third positioning point (24) of the blade (11) abut against and be positioned with the measuring device (10). Then, measure the dimensions of the first theoretical positioning point (19), the third theoretical positioning point (21), and the second theoretical positioning point (20) of the blade (11) respectively through the first measuring gauge (1024), the second measuring gauge (1034), and the third measuring gauge (1044), and set the values of the first measuring gauge (1024), the second measuring gauge (1034), and the third measuring gauge (1044) to zero. Step 2: Place the alloy block (3) into the alloy seat (2) and position it. Then, place the blade (11) on the top end face of the alloy block (3) and position it. Step 3: Thread the cover plate (7) onto the alloy seat (2) so that the blade (11) and the alloy block (3) are sequentially located in the casting cavity between the cover plate (7) and the alloy seat (2) from top to bottom. Inject resin into the casting cavity through the casting port (701) so that the blade (11) and the alloy block (3) are cast and wrapped together, thereby completing the machining of the blade tenon teeth. Step 4: Place the processed blade (11) into the measuring device (10), and make the first positioning point (22), the second positioning point (23), and the third positioning point (24) of the blade (11) abut against and be positioned with the measuring device (10). Then, measure the dimensional change amounts of the first theoretical positioning point (19), the third theoretical positioning point (21), and the second theoretical positioning point (20) on the processed blade (11) respectively through the first measuring gauge (1024), the second measuring gauge (1034), and the third measuring gauge (1044), and determine whether the dimensional change amount of the processed blade (11) is within the preset error range.

Images