Low-pressure turbine blade tenon tooth machining device and method

Abstract

The invention relates to a low-pressure turbine blade tenon tooth machining device and method, and belongs to the technical field of machining. The low-pressure turbine blade tenon tooth machining device comprises a positioning machining device, a base is fixedly connected with the bottom of an alloy seat, the top of the alloy seat is detachably connected with a cover plate, an alloy block is located in the alloy seat, and a first pressing assembly and a second pressing assembly are located at one end of the alloy seat; the second pressing assembly is in sliding fit with one end of the alloy seat, and the third pressing assembly is located at the other end of the alloy seat. The device has the beneficial effects that the first pressing point of the first pressing assembly for pressing the blade is adjusted, the second pressing point of the second pressing assembly for pressing the blade is adjusted, and the third pressing point and the fourth pressing point of the third pressing assembly for pressing the blade are adjusted; resin is injected into the alloy seat through the sprue gate, so that the blade and the alloy block are poured and wrapped together to complete blade tenon tooth machining, the rigidity of the blade is increased, and the surface quality of the blade is improved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and in particular to a low-pressure turbine blade tenon processing device and method. Background Art

[0002] The processing of low-pressure turbine blades usually starts with the six-point positioning of the material to produce the tenons, and then the blade crown and other parts are processed with the tenons. Among them, the slender and thin low-pressure turbine blades are "slender and thin". The six-point positioning of the material will cause the blades to deform during the positioning process, and it is difficult to ensure the size of the tenon part. The traditional method for processing the tenon part of this type of blade is to cast tin-bismuth alloy on the blade body as a positioning block to compensate for the problem of deformation of the blade body, and then use tin-bismuth alloy for positioning to produce the tenons. However, removing the tin-bismuth alloy will produce 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 processing device and method are provided to solve the problems raised in the above-mentioned background technology. Summary of the invention

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

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a low-pressure turbine blade tenon processing device, including a positioning processing device, the positioning processing device includes a base, an alloy seat, an alloy block, a first clamping assembly, a second clamping assembly, a third clamping assembly 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 casting cavity is formed between the alloy seat and the cover plate, a casting port is provided on the cover plate, the alloy block is used to be placed in the casting cavity, and the alloy seat has a first reference positioning point, a second reference positioning point and a third reference positioning point. The alloy block has a first casting determination point, a second casting determination point and a third casting determination point. The first reference positioning point, the second reference positioning point and the third reference positioning point are used to abut against the first casting determination point, the second casting determination point and the third casting determination point on the alloy block in a one-to-one correspondence. The first clamping assembly and the second clamping assembly are both located at one end of the alloy seat and are fixedly connected to the base. The second clamping assembly is slidably matched with one end of the alloy seat. The third clamping assembly 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: an alloy block is placed in an alloy seat on a base, and the first casting predetermined position point, the second casting predetermined position point and the third casting predetermined position point on the alloy block correspond one-to-one with the first reference positioning point, the second reference positioning point and the third reference positioning point in the alloy seat; a blade is then placed on the top end surface of the alloy block, and the first positioning point, the second positioning point and the third positioning point on the blade correspond one-to-one with the first casting predetermined position point, the second casting predetermined position point and the third casting predetermined position point and position on the alloy block; Subsequently, adjust the first clamping point of the blade pressed by the first clamping assembly, adjust the second clamping point of the blade pressed by the second clamping assembly, adjust the third clamping point and the fourth clamping point of the blade pressed by the third clamping assembly to clamp the blade and prevent the blade from shifting; thread the cover plate to the alloy seat, and 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 blade tenon processing to increase the rigidity of the blade and improve the surface quality of the blade.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Further, the first clamping assembly includes a first clamping block, a first fixing block and a first positioning screw, the first fixing block is located at one end of the alloy seat and fixedly connected to the base, one end of the first fixing block is rotatably connected to one end of the first clamping block, the other end of the first clamping block is threadedly connected to the other end of the first fixing block through the first positioning screw, and the first fixing block has a second positioning surface on the side facing the second clamping assembly.

[0009] The beneficial effect of adopting the above further scheme is: after the blade is placed on the top end surface of the alloy block, the first positioning screw is tightened so that the other end of the first clamping block moves downward in the vertical direction until it moves to the first clamping point where the first clamping block abuts and presses the blade, and the second positioning surface abuts and presses the blade to the fourth theoretical positioning point.

[0010] Furthermore, the second clamping assembly includes a second clamping block, a second fixing block and a first clamping screw, the second fixing block is located on one side of the first fixing block and is fixedly connected to the base, the second fixing block has a first groove on a side close to the first fixing block, the second clamping block is located in the first groove, and one end of the second clamping block is rotatably connected to the second fixing block, one end of the alloy seat has a slide groove, the other end of the second clamping block is slidably matched with the slide groove, the first clamping screw passes through the second fixing block and abuts against the side wall of the second clamping block.

[0011] The beneficial effect of adopting the above further scheme is: after the first clamping point of the blade is clamped, the first clamping screw is adjusted so that the first clamping screw pushes the second clamping block to rotate toward the first fixed block and slide in the slide groove until it slides to the second clamping point that abuts and clamps the blade.

[0012] Furthermore, the third clamping assembly includes a third fixed block, a second clamping screw, a clamping clamp and a pressure head. The third fixed block is located at the other end of the alloy seat and is fixedly connected to the base. One end of the third fixed block is threadedly connected to the second clamping screw, and the other end of the third fixed block is fixedly connected to the clamping clamp. The pressure head is fixed to the end of the clamping clamp.

[0013] The beneficial effect of adopting the above further scheme is: after the first clamping point and the second clamping point of the blade are clamped, adjust the clamping clamp so that the pressure head moves downward in the vertical direction until it moves to abut and clamp the third clamping point; and adjust the second clamping screw so that the second clamping screw abuts and clamps the fourth clamping point.

[0014] Furthermore, the positioning processing device also includes a fourth fixed block, which is located on one side of the third fixed block and fixedly connected to the base. A positioning ball is fixed on the fourth fixed block, and the fourth fixed block has a first positioning surface on one side close to the third clamping assembly.

[0015] The beneficial effect of adopting the above further solution is that the positioning ball on the fourth fixing block can be used to abut 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 and press the fifth theoretical positioning point of the blade.

[0016] Furthermore, the positioning processing device also includes a support assembly, which includes a support plate, a support column 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 spaced circumferentially along 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 fourth spring is disposed on the outer sleeve of the support column. 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 keep it away from the base.

[0017] The beneficial effect of adopting the above further scheme is that when the bottom of the base is subjected to external thrust, the external thrust exerts an upward force in the vertical direction on the support plate and the fourth spring, driving the alloy seat to move upward in the vertical direction, and then pushing the processed blades in the alloy seat upward in the vertical direction, making it easier to remove the processed blades.

[0018] Further, it also includes a measuring device, which includes a base 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 to the middle of the base plate, and the first positioning block has a first measurement positioning point, a second measurement positioning point and a third measurement positioning point. The first measurement positioning point, the second measurement positioning point and the third measurement positioning point are used to abut against the first positioning point, the second positioning point and the third positioning point of the blade in a one-to-one correspondence. 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 base plate. The first measurement component and the second measurement component are respectively located on both sides of the first positioning block end, and is fixedly connected to the bottom plate, one end of the first measuring component abuts against one side of one end of the first positioning block, the third measuring component and the fourth positioning block are located on both sides 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 one side close to the first measuring component, one end of the third measuring component abuts against the other side 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 to 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, and the sixth positioning block has a fourth positioning surface on one side close to the second measuring component.

[0019] The beneficial effect of adopting the above further scheme is that the first measuring component, the second measuring component and the third measuring component on the base plate can respectively measure the sizes 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 and press the fourth theoretical positioning point of the blade, the fourth positioning surface of the sixth positioning block can abut and press the fifth theoretical positioning point of the blade, and the fourth positioning pin of the fifth positioning block can abut and press the sixth theoretical positioning point of the blade.

[0020] Furthermore, the measuring device also includes a first positioning pin, a second positioning pin and a third positioning pin, and both sides of one end of the first positioning block are slidably matched with the first positioning pin and the third positioning pin respectively, and one side of the second measuring component is slidably matched with the second positioning pin.

[0021] The beneficial effect of adopting the above further scheme is: the second theoretical positioning point of the blade can abut and press the top of the third positioning pin, so that the third positioning pin slides downward in the vertical direction; the first theoretical positioning point of the blade can abut and press the top of the first positioning pin, so that the first positioning pin slides downward in the vertical direction; the third theoretical positioning point of the blade can abut and press the top of the second positioning pin, so that the second positioning pin slides downward in the vertical direction.

[0022] Further, the first measuring assembly includes a first measuring block, a first lever, a first spring and a first measuring gauge, the first lever passes through the lower part of the first measuring block and is movably connected to the first measuring block, the first measuring gauge passes through one end of the first measuring 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 measuring block, and the other end of the first spring abuts against the other end of the first lever; the second measuring assembly includes a second measuring block, a second lever, a second spring and a second measuring gauge, the second lever passes through the lower part of the second measuring block and is movably connected to the second measuring block, the second measuring gauge passes through one side of the second measuring block and abuts against the second lever One side of the rod abuts, the second locating pin passes through the other side of the second measuring 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 measuring block, and the other end of the second spring abuts against the other side of the second lever; the third measuring assembly includes a third measuring block, a third lever, a third spring and a third measuring table, the third lever passes through the lower part of the third measuring block and is movably connected with the third measuring block, the third measuring table passes through one side of the third measuring block and abuts against one side of the third lever, the third locating pin passes through the other side 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 measuring block, and the other end of the third spring abuts against the other side of the third lever.

[0023] The beneficial effect of adopting the above further scheme is that 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 under the action of the first spring, one end of the first lever is driven to move downward in the vertical direction, and the other end of the first lever is moved upward in the vertical direction, and the other end of the first lever is abutted against the first measuring gauge, thereby measuring the size of the first theoretical positioning point of the blade; 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 under the action of the second spring, one end of the second lever is driven to move downward in the vertical direction, and the other end of the second lever moves upward in the vertical direction, and the other end of the second lever abuts against the second measuring gauge, thereby measuring the size of the third theoretical positioning point of the blade; After the second theoretical positioning point of the blade abuts and presses the top of the third positioning pin, the third positioning pin moves downward in the vertical direction until it abuts the third lever, and under the action of the third spring, drives one end of the third lever to move downward in the vertical direction, and 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 table, thereby measuring the size of the second theoretical positioning point of the blade.

[0024] The present invention also provides a method for machining a low-pressure turbine blade tenon, comprising the following steps: Step 1: Place an unprocessed blade into a measuring device, and make the first positioning point, the second positioning point and the third positioning point of the blade abut against and position the measuring device, and then measure the sizes of the first theoretical positioning point, the third theoretical positioning point and the second theoretical positioning point of the blade respectively through a first measuring table, a second measuring table and a third measuring table, and set the values ​​of the first measuring table, the second measuring table and the third measuring table to zero; Step 2: placing the alloy block into the alloy seat and positioning it, and then placing the blade on the top end surface of the alloy block and positioning it; Step 3: Threading the cover plate to the alloy seat, so that the blade and the alloy block are sequentially located in the casting cavity between the cover plate and the alloy seat from top to bottom; injecting resin into the casting cavity through the pouring port, so that the blade and the alloy block are cast and wrapped together, thereby completing the blade tenon processing; 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 and position against the measuring device; then use the first measuring table, the second measuring table and the third measuring table to respectively measure the dimensional changes of the first theoretical positioning point, the third theoretical positioning point and the second theoretical positioning point on the blade after processing, and determine whether the dimensional change of the processed blade is within a preset error range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a low-pressure turbine blade tenon processing device of the present invention; Figure 2 It is a partial structural schematic diagram of a low-pressure turbine blade tenon processing device of the present invention; Figure 3 It is a structural schematic diagram of the cover plate of the present invention; Figure 4 It is a left side view of the tenon processing device for low-pressure turbine blades of the present invention; Figure 5 A top view of a low-pressure turbine blade tenon processing device according to the present invention; Figure 6 for Figure 5 DD cross-sectional view; Figure 7 for Figure 6 FF cross-sectional view; Figure 8 It is a structural schematic diagram of the alloy seat of the present invention; Fig. 9 is a front view of the alloy block of the present invention; Fig.10 A bottom view of the alloy block of the present invention; Fig.11 This is one of the structural schematic diagrams of the blade of the present invention; Fig.12 This is the second structural schematic diagram of the blade of the present invention; Fig.13 This is the third structural schematic diagram of the blade of the present invention; Fig.14 It is one of the partial schematic diagrams of the low-pressure turbine blade tenon processing device of the present invention; Fig.15 This is a second partial schematic diagram of the low-pressure turbine blade tenon processing device of the present invention; Fig.16 It is a structural schematic diagram of the measuring device of the present invention; Fig.17 It is one of the partial schematic diagrams of the measuring device of the present invention; Fig.18 This is a second partial schematic diagram of the measuring device of the present invention; Fig.19 This is a third partial schematic diagram of the measuring device of the present invention; Fig. 20 This is the fourth partial schematic diagram of the measuring device of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Base; 2. Alloy seat; 201. Slide; 3. Alloy block; 4. First clamping assembly; 401. First clamping block; 402. First fixing block; 403. First positioning screw; 404. Positioning nut; 405. Second positioning surface; 5. Second clamping assembly; 501. Second clamping block; 502. Second fixing block; 503. First clamping screw; 6. Third clamping assembly; 601. Third fixing block; 602. Second clamping screw; 603. Clamping clamp; 604. Pressing head; 7. Cover plate; 701. Casting 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 table; 103, second measuring assembly; 1031, second measuring block; 1032, second lever; 1033, second spring; 1034, second measuring table; 104, third measuring assembly; 1041, third measuring block; 1042, third lever; 1043, third spring; 1044 , third measuring table; 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 processing device; 13, first reference positioning point; 14, second reference positioning point; 15, third reference positioning point; 16, first pouring The first predetermined location; 17, the second predetermined location; 18, the third predetermined location; 19, the first theoretical location; 20, the second theoretical location; 21, the third theoretical location; 22, the first location; 23, the second location; 24, the third location; 25, the first measured location; 26, the second measured location; 27, the third measured location; 28, the fourth theoretical location; 29, the fifth theoretical location; 30, the sixth theoretical location; 31, the first pressing point; 32, the second pressing point; 33, the third pressing point; 34, the fourth pressing point; 35, the fifth pressing point; 36, the sixth pressing point. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] like Fig.13As 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, wherein the first theoretical positioning point 19 and the second theoretical positioning point 20 are located at the back extension section of the blade, the third theoretical positioning point 21 is located at the back of the blade body, the fourth theoretical positioning point 28 is located at the trailing edge plate of the blade, the fifth theoretical positioning point 29 is located at the trailing edge crown of the blade, and the sixth theoretical positioning point 30 is located at the lower surface of the back of the blade crown; the blade 11 (standard part) also has a first positioning point 22, a second positioning point 23 and a third positioning point 24.

[0029] 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 basin-oriented 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 blade basin-oriented extension section 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.

[0030] like Fig.11 As shown, 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 .

[0031] like Figure 1-Figure 20 As shown, this embodiment provides a low-pressure turbine blade tenon processing device, including a positioning processing device 12, the positioning processing device 12 includes a base 1, an alloy seat 2, an alloy block 3, a first clamping assembly 4, a second clamping assembly 5, a third clamping 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 surrounded by the alloy seat 2 and the cover plate 7, the cover plate 7 has a pouring 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 The block 3 is provided with a first casting determination point 16, a second casting determination point 17 and a third casting determination 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 determination point 16, the second casting determination point 17 and the third casting determination point 18 on the alloy block 3 in a one-to-one correspondence, the first clamping assembly 4 and the second clamping assembly 5 are both located at one end of the alloy seat 2 and are fixedly connected to the base 1, the second clamping assembly 5 is slidably matched with one end of the alloy seat 2, and the third clamping assembly 6 is located at the other end of the alloy seat 2 and is fixedly connected to the base 1.

[0032] Put the alloy block 3 into the alloy seat 2 on the base 1, and make the first casting predetermined point 16, the second casting predetermined point 17 and the third casting predetermined 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 one by one; then put the blade 11 on the top end surface 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 predetermined point 16, the second casting predetermined point 17 and the third casting predetermined point 18 on the alloy block 3 one by one; Subsequently, the first clamping assembly 4 is adjusted to clamp the first clamping point 31 of the blade 11, the second clamping assembly 5 is adjusted to clamp the second clamping point 32 of the blade 11, and the third clamping assembly 6 is adjusted to clamp the third clamping point 33 and the fourth clamping point 34 of the blade 11 to clamp the blade 11 and prevent the blade 11 from shifting; the cover plate 7 is threadedly connected to the alloy seat 2, and resin is injected into the alloy seat 2 through the pouring port 701, so that the blade 11 and the alloy block 3 are cast and wrapped together to complete the blade tenon processing, so as to increase the rigidity of the blade 11 and improve the surface quality of the blade 11.

[0033] like Figure 8 As shown, the alloy seat 2 has a cavity, and the bottom of the cavity is spaced apart from a first reference positioning point 13, a second reference positioning point 14 and a third reference positioning point 15. Fig.10 As shown, a first casting location 16, a second casting location 17 and a third casting location 18 are provided at the bottom of the alloy block 3, and both ends of the alloy block 3 have openings.

[0034] Among them, Fig.12 As 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, and the blade 11 is positioned by positioning the first casting determination point 16, the second casting determination point 17 and the third casting determination point 18 of the alloy block 3, thereby realizing the conversion of the positioning reference point of the blade 11.

[0035] In addition, handles are provided on both sides of the cover plate 7 to facilitate operation by the staff, and handles are also provided on both sides of the base 1.

[0036] Specifically, two sides of the top of the alloy seat 2 are threadedly connected to the cover plate 7 .

[0037] In this embodiment, the pouring port 701 is a rectangular through hole. The pouring port 701 may also be set to other shapes, such as a square, according to actual conditions.

[0038] In addition, the first clamping assembly 4 , the second clamping assembly 5 and the third clamping assembly 6 are all connected to the base 1 by bolts.

[0039] On the basis of the above scheme, the first clamping assembly 4 includes a first clamping block 401, a first fixed block 402 and a first positioning screw 403. The first fixed 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 fixed block 402 is rotatably connected to one end of the first clamping block 401. The other end of the first clamping block 401 is threadedly connected to the other end of the first fixed block 402 through the first positioning screw 403. The first fixed block 402 has a second positioning surface 405 on the side facing the second clamping assembly 5.

[0040] After the blade 11 is placed on the top end surface of the alloy block 3, tighten the first positioning screw 403 so that the other end of the first clamping block 401 moves downward in the vertical direction until it moves to the first clamping point 31 where the first clamping block 401 abuts and presses the blade 11, and the second positioning surface 405 abuts and presses the fourth theoretical positioning point 28 of the blade 11.

[0041] 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. The positioning nut 404 can be a butterfly nut.

[0042] The first fixing block 402 is fixedly connected to the base 1 by bolts.

[0043] On the basis of the above scheme, the second clamping assembly 5 includes a second clamping block 501, a second fixed block 502 and a first clamping screw 503. The second fixed block 502 is located on one side of the first fixed block 402 and is fixedly connected to the base 1. The second fixed block 502 has a first groove on the side close to the first fixed block 402. The second clamping block 501 is located in the first groove, and one end of the second clamping block 501 is rotatably connected to the second fixed block 502. One end of the alloy seat 2 has a slide groove 201, and the other end of the second clamping block 501 slides with the slide groove 201. The first clamping screw 503 passes through the second fixed block 502 and abuts against the side wall of the second clamping block 501.

[0044] After the first clamping point 31 of the blade 11 is clamped, the first clamping screw 503 is adjusted so that the first clamping screw 503 pushes the second clamping block 501 to rotate toward the first fixing block 402 and slide in the slide groove 201 until it slides to abut and clamp the second clamping point 32 of the blade 11.

[0045] Specifically, the first clamping screw 503 is threadedly connected to the second fixing block 502 . Tightening the first clamping screw 503 can push the second fixing block 502 to move toward the first fixing block 402 , and loosening the first clamping screw 503 can push the second fixing block 502 to move away from the first fixing block 402 .

[0046] In addition, the second fixing block 502 is threadedly fixedly connected to the base 1. The first fixing block 402 and the second fixing block 502 are arranged side by side.

[0047] On the basis of the above scheme, the third clamping assembly 6 includes a third fixed block 601, a second clamping screw 602, a clamping clamp 603 and a pressing head 604. The third fixed 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 fixed block 601 is threadedly connected to the second clamping screw 602, and the other end of the third fixed block 601 is fixedly connected to the clamping clamp 603. The pressing head 604 is fixed to the end of the clamping clamp 603.

[0048] After the first clamping point 31 and the second clamping point 32 of the blade 11 are clamped, adjust the clamping clamp 603 so that the pressure head 604 moves downward in the vertical direction until it moves to abut and clamp the third clamping point 33; and adjust the second clamping screw 602 so that the second clamping screw 602 abuts and clamps the fourth clamping point 34.

[0049] Specifically, a clamp 603 is fixed to the top of one end of the third fixing block 601. Tightening or loosening the second clamp screw 602 can make the second clamp screw 602 abut against or away from the blade 11.

[0050] The third fixing block 601 is fixedly connected to the base 1 by threads.

[0051] In addition, the pressing head 604 is located above the third pressing point 33 .

[0052] Based on the above scheme, the positioning processing device 12 also includes a fourth fixed block 8, which is located on one side of the third fixed block 601 and is fixedly connected to the base 1. A positioning ball 801 is fixed on the fourth fixed block 8, and the fourth fixed block 8 has a first positioning surface 802 on the side close to the third clamping assembly 6.

[0053] The positioning ball 801 on the fourth fixing block 8 can be used to abut 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 and press the fifth theoretical positioning point 29 of the blade 11 .

[0054] Specifically, the fourth fixing block 8 has a positioning ball 801 at one end away from the alloy seat 2 .

[0055] The third fixing block 601 and the fourth fixing block 8 are arranged side by side.

[0056] On the basis of the above scheme, the positioning processing device 12 also includes a support assembly 9, which includes a support plate 901, a support column 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 support columns 902 are circumferentially spaced 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 support column 902 is outer-mounted with the fourth spring 903. 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 keep it away from the base 1.

[0057] When the bottom of the base 1 is subjected to external thrust, the external thrust exerts an upward force in the vertical direction on the support plate 901 and the fourth spring 903, driving the alloy seat 2 to move upward in the vertical direction, and then pushing the processed blades 11 in the alloy seat 2 upward in the vertical direction, making it easier to remove the processed blades 11.

[0058] Specifically, the bottom of the alloy seat 2 has a third groove, and the support assembly 9 is located in a cavity surrounded by the third groove and the base 1 .

[0059] In this example, two top blocks 904 are also included. The top block 904 is located between the two support columns 902, and 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.

[0060] In addition, when in use, the base 1 of the positioning processing device 12 can be placed on a plane, and an external force can be applied to the base 1 when necessary.

[0061] On the basis of the above scheme, it also includes a measuring device 10, which includes a base plate 101, a first measuring component 102, a second measuring component 103, a third measuring component 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 to the middle of the base plate 101, and the first positioning block 105 has a first measurement positioning point 25, a second measurement positioning point 26 and a third measurement positioning point 27. The first measurement positioning point 25, the second measurement positioning point 26 and the third measurement 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 base plate 101. The first measurement component 102 and the second measurement component 103 are respectively located in the first The two ends of the positioning block 105 are fixedly connected to the base plate 101, one end of the first measuring component 102 is abutted against one side of one end of the first positioning block 105, the third measuring component 104 and the fourth positioning block 109 are located on both sides of the first positioning block 105 close to one end of the first measuring component 102, and are fixedly connected to the base plate 101, the fourth positioning block 109 has a third positioning surface 1091 on one side close to the first measuring component 102, one end of the third measuring component 104 is abutted against the other side of one end of the first positioning block 105, the fifth positioning block 110 is located on one side of the second measuring component 103, and is fixedly connected to the base plate 101, a fourth positioning pin 115 is fixed to 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 base plate 101, and the sixth positioning block 111 has a fourth positioning surface 108 on one side close to the second measuring component 103.

[0062] The first measuring component 102, the second measuring component 103, and the third measuring component 104 on the base plate 101 can respectively measure the sizes 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 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 and press the fifth theoretical positioning point 29 of the blade 11; and the fourth positioning pin 115 of the fifth positioning block 110 can abut and press the sixth theoretical positioning point 30 of the blade 11.

[0063] Specifically, Fig.18As shown, the third positioning surface 1091 is located on the side of the fourth positioning block 109 facing the third measurement component 104. The fourth positioning surface 108 is located on the side of the sixth positioning block 111 facing the second measurement component 103. The fourth positioning pin 115 is located on the side of the fifth positioning block 110 away from the first measurement component 102.

[0064] The second positioning block 106 is screwed with a second positioning screw 1061, and the third positioning block 107 is threadedly connected with a third positioning screw 1071. Fig.11 As shown, tightening the second positioning screw 1061 can make the second positioning screw 1061 abut against and press the sixth clamping point 36 of the blade 11, and tightening the third positioning screw 1071 can make the third positioning screw 1071 abut against and press the fifth clamping point 35 of the blade 11, thereby increasing the accuracy of positioning the blade 11.

[0065] In addition, such as Fig.17 As shown, the top of the first positioning block 105 has a first measurement positioning point 25, a second measurement positioning point 26 and a third measurement positioning point 27, and the first measurement positioning point 25, the second measurement positioning point 26 and the third measurement positioning point 27 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, thereby increasing the accuracy of positioning the blade 11 and avoiding displacement.

[0066] On the basis of the above scheme, the measuring device 10 also includes a first positioning pin 113, a second positioning pin 114 and a third positioning pin 112, and the two sides of one end of the first positioning block 105 are respectively slidably matched with the first positioning pin 113 and the third positioning pin 112, and one side of the second measuring component 103 is slidably matched with the second positioning pin 114.

[0067] The second theoretical positioning point 20 of the blade 11 can abut and press the top of the third positioning pin 112, so that the third positioning pin 112 slides downward in the vertical direction; the first theoretical positioning point 19 of the blade 11 can abut and press the top of the first positioning pin 113, so that the first positioning pin 113 slides downward in the vertical direction; the third theoretical positioning point 21 of the blade 11 can abut and press the top of the second positioning pin 114, so that the second positioning pin 114 slides downward in the vertical direction.

[0068] Specifically, sleeves are spaced apart at 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 pass through the sleeves respectively and are slidably connected to the first positioning block 105 .

[0069] On the basis of the above scheme, the first measuring component 102 includes a first measuring 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 measuring block 1021 and is movably connected to the first measuring block 1021. The first measuring gauge 1024 passes through one end of the first measuring block 1021 and abuts against one end of the first lever 1022. The first positioning pin 113 passes through one side of one 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 measuring block 1021, and the other end of the first spring 1023 abuts against the other end of the first lever 1022; the second measuring assembly 103 includes a second measuring 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 measuring block 1031 and is movably connected to the second measuring block 1031, and the second measuring gauge 1034 passes through one side of the second measuring block 1031, The second positioning pin 114 passes through the other side of the second measuring 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 measuring block 1031, and the other end of the second spring 1033 abuts against the other side of the second lever 1032. The third measuring assembly 104 includes a third measuring block 1041, a third lever 1042, a third spring 1043 and a third measuring table 1044. The third lever 1042 passes through The third measuring block 1041 is at the lower part and is movably connected to the third measuring block 1041. The third measuring gauge 1044 passes through one side of the third measuring block 1041 and abuts against one side of the third lever 1042. The third positioning pin 112 passes through the other side of one 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 measuring block 1041, and the other end of the third spring 1043 abuts against the other side of the third lever 1042.

[0070] 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 under the action of the first spring 1023, one end of the first lever 1022 is driven to move downward in the vertical direction, and the other end of the first lever 1022 moves upward in the vertical direction, and the other end of the first lever 1022 abuts against the first measuring gauge 1024, thereby measuring the size of the first theoretical positioning point 19 of the blade 11; 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 under the action of the second spring 1033, one end of the second lever 1032 is driven to move downward in the vertical direction, and the other end of the second lever 1032 moves upward in the vertical direction, and the other end of the second lever 1032 abuts against the second measuring gauge 1034, thereby measuring the size of the third theoretical positioning point 21 of the blade 11; 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 under the action of the third spring 1043, one end of the third lever 1042 is driven to move downward in the vertical direction, and the other end of the third lever 1042 moves upward in the vertical direction, and the other end of the third lever 1042 abuts against the third measuring gauge 1044, thereby measuring the size of the second theoretical positioning point 20 of the blade 11.

[0071] This embodiment also provides a method for machining tenon teeth of a low-pressure turbine blade, comprising 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 and position against the measuring device 10, and then measure the sizes 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 table 1024, the second measuring table 1034 and the third measuring table 1044, and set the values ​​of the first measuring table 1024, the second measuring table 1034 and the third measuring table 1044 to zero; 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 surface of the alloy block 3 and position it; Step 3: Thread the cover plate 7 and 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 pouring port 701 so that the blade 11 and the alloy block 3 are cast and wrapped together, thereby completing the blade tenon processing; 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 and position against the measuring device 10; then use the first measuring table 1024, the second measuring table 1034 and the third measuring table 1044 to respectively measure the dimensional changes of the first theoretical positioning point 19, the third theoretical positioning point 21 and the second theoretical positioning point 20 on the blade 11 after processing, and determine whether the dimensional change of the processed blade 11 is within a preset error range.

[0072] Specifically, if 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 after processing are compared with the dimension changes of the first theoretical positioning point 19, the third theoretical positioning point 21 and the second theoretical positioning point 20 on the blade 11 before processing, and the difference is within a preset range, then the processed blade 11 is a qualified product; if it is not within the preset range, then the processed blade 11 is a defective product.

[0073] Among them, in step 2, before the alloy block 3 is placed in 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.

[0074] In the description of the present invention, it is necessary to understand that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A low-pressure turbine blade tenon processing device, characterized in that: The invention comprises a positioning processing device (12), wherein the positioning processing device (12) comprises a base (1), an alloy base (2), an alloy block (3), a first clamping assembly (4), a second clamping assembly (5), a third clamping assembly (6) and a cover plate (7), wherein the base (1) is fixedly connected to the bottom of the alloy base (2), the top of the alloy base (2) is detachably connected to the cover plate (7), a casting cavity is formed between the alloy base (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 base (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 port (702), and the alloy block (3) has a first casting port (703). A predetermined casting position (16), a second predetermined casting position (17) and a third predetermined casting position (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 predetermined casting position (16), the second predetermined casting position (17) and the third predetermined casting position (18) on the alloy block (3) in a one-to-one correspondence; the first clamping assembly (4) and the second clamping assembly (5) are both located at one end of the alloy seat (2) and are both fixedly connected to the base (1); the second clamping assembly (5) is slidably matched with one end of the alloy seat (2); and the third clamping assembly (6) is located at the other end of the alloy seat (2) and is fixedly connected to the base (1).

2. A low-pressure turbine blade tenon processing device according to claim 1, characterized in that: The first clamping assembly (4) comprises a first clamping 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 clamping block (401); the other end of the first clamping block (401) is threadedly connected to the other end of the first fixing block (402) via the first positioning screw (403); and the first fixing block (402) has a second positioning surface (405) on a side facing the second clamping assembly (5).

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

4. A low-pressure turbine blade tenon processing device according to claim 1, characterized in that: The third clamping assembly (6) comprises a third fixing block (601), a second clamping screw (602), a clamping 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 clamping screw (602); the other end of the third fixing block (601) is fixedly connected to the clamping clamp (603); and the pressing head (604) is fixed to the end of the clamping clamp (603).

5. A low-pressure turbine blade tenon processing device according to claim 4, characterized in that: The positioning processing device (12) further comprises a fourth fixing block (8), the fourth fixing block (8) being located on one side of the third fixing block (601) and fixedly connected to the base (1), a positioning ball (801) being fixed on the fourth fixing block (8), and a first positioning surface (802) being provided on a side of the fourth fixing block (8) close to the third clamping assembly (6).

6. A low-pressure turbine blade tenon processing device according to claim 1, characterized in that: The positioning processing device (12) further comprises a support assembly (9), wherein the support assembly (9) comprises a support plate (901), a support column (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 support columns (902) are circumferentially spaced and distributed 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 outer sleeve of the support column (902) is provided with the fourth spring (903); one end of the fourth spring (903) abuts against the support plate (901); 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 keep it away from the base (1).

7. A low-pressure turbine blade tenon processing device according to claim 1, characterized in that: The measuring device (10) further comprises a measuring device (10), the measuring device (10) comprising a base plate (101), a first measuring component (102), a second measuring component (103), a third measuring component (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) being fixed at the middle of the base plate (101), the first positioning block (105) having a first measuring positioning point (25), a second measuring positioning point (26), and a third measuring block (111). 6) and a third measurement positioning point (27), the first measurement positioning point (25), the second measurement positioning point (26) and the third measurement 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 base plate (101), the first measurement component (102) and the second measurement component (103) are respectively located The first positioning block (105) is located at two ends thereof and is fixedly connected to the bottom plate (101); one end of the first measuring component (102) is in contact with one side of one end of the first positioning block (105); the third measuring component (104) and the fourth positioning block (109) are located on both sides of the first positioning block (105) close to one end of the first measuring component (102) and are fixedly connected to the bottom plate (101); the fourth positioning block (109) has a third positioning surface (1091) on one side close to the first measuring component (102); the third measuring component (104) and the fourth positioning block (109) are located on both sides of the first positioning block (105) close to one end of the first measuring component (102) and are fixedly connected to the bottom plate (101); the fourth positioning block (109) has a third positioning surface (1091) on one side close to the first measuring component (102); One end of the component (104) abuts against the other side of one end of the first positioning block (105); the fifth positioning block (110) is located on one side of the second measuring component (103) and is fixedly connected to the base plate (101); a fourth positioning pin (115) is fixed to 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 base plate (101); and a fourth positioning surface (108) is provided on a side of the sixth positioning block (111) close to the second measuring component (103).

8. A low-pressure turbine blade tenon processing device according to claim 7, characterized in that: The measuring device (10) further comprises a first positioning pin (113), a second positioning pin (114) and a third positioning pin (112); two sides of one end of the first positioning block (105) are respectively slidably engaged with the first positioning pin (113) and the third positioning pin (112); and one side of the second measuring component (103) is slidably engaged with the second positioning pin (114).

9. A low-pressure turbine blade tenon processing device according to claim 8, characterized in that: The first measuring assembly (102) comprises a first measuring 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 measuring block (1021) and is movably connected to the first measuring block (1021); the first measuring gauge (1024) passes through one end of the first measuring block (1021) and abuts against one end of the first lever (1022); the first positioning pin (113) passes through one side of one 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 measuring block (1021), and the other end of the first spring (1023) abuts against the other end of the first lever (1022); the second measuring assembly (103) comprises a second measuring 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 measuring block (1031) and is movably connected to the second measuring block (1031); the second measuring gauge (1034) passes through one side of the second measuring block (1031) and is in contact with the second measuring block (1031). The second positioning pin (114) passes through the other side of the second measuring 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 measuring block (1031); the other end of the second spring (1033) abuts against the other side of the second lever (1032); the third measuring assembly (104) comprises a third measuring block (1041), a third lever (1042), a third spring (1043) and a third measuring gauge (1044); the third lever (1042 ... The third measuring block (1041) passes through the lower part of the third measuring block (1041) and is movably connected to the third measuring block (1041); the third measuring gauge (1044) passes through one side of the third measuring block (1041) and abuts against one side of the third lever (1042); the third positioning pin (112) passes through the other side of one 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 measuring block (1041); and the other end of the third spring (1043) abuts against the other side of the third lever (1042).

10. A method for machining tenon teeth of a low-pressure turbine blade, implemented by using the low-pressure turbine blade tenon teeth machining device according to claim 9, characterized in that: The following steps are involved: Step 1: placing an unprocessed blade (11) into a measuring device (10), and making the first positioning point (22), the second positioning point (23), and the third positioning point (24) of the blade (11) abut against and position the blade (10), and then respectively measuring 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) using a first measuring table (1024), a second measuring table (1034), and a third measuring table (1044), and setting the values ​​of the first measuring table (1024), the second measuring table (1034), and the third measuring table (1044) to zero; Step 2: placing the alloy block (3) into the alloy seat (2) and positioning it, and then placing the blade (11) on the top end surface of the alloy block (3) and positioning it; Step 3: Threading the cover plate (7) and the alloy seat (2) so that the blade (11) and the alloy block (3) are located in the casting cavity between the cover plate (7) and the alloy seat (2) from top to bottom; injecting 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 blade tenon processing; Step 4: placing the processed blade (11) into the measuring device (10), and making the first positioning point (22), the second positioning point (23), and the third positioning point (24) of the blade (11) abut against and position the blade (10); and then respectively measuring the dimensional changes 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) using the first measuring table (1024), the second measuring table (1034), and the third measuring table (1044), to determine whether the dimensional change of the processed blade (11) is within a preset error range.

Images