A sealing groove machining device for a turbine working blade

Abstract

The present invention relates to the technical field of metal processing, and particularly to a sealing groove processing device for a turbine working blade, including a support part, a middle connection part, a fixture module, a turbine blade, and an electric discharge machining main body for carrying the support part, the middle connection part, the fixture module, and the turbine blade. The electric discharge machining main body includes a machine base, and machining heads are installed on both sides of the upper part of the machine base. In the present invention, through structures such as the support part, the middle connection part, and the fixture module, the sealing groove processing device can simultaneously machine the sealing grooves on the blade basin side and the blade back side of the turbine working blades on both sides by installing the corresponding-shaped machining electrodes for the blade basin side and the blade back side sealing grooves. Then, through the adjustment of the adjustable fixture, the turbine blades on both sides can be adjusted according to the machining requirements of the sealing grooves to be machined on the other side. After the position is swapped, the sealing grooves on the unprocessed side of the turbine blade are machined, thereby improving the machining efficiency and machining qualification rate of the sealing grooves of the working blade.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing, and particularly to a sealing groove processing device for a turbine working blade. Background Art

[0002] The turbine working blade is an important component of a gas turbine and an aeroengine. It generally includes a blade body, upper flange plates and lower flange plates on both sides of the blade body. Its unique curved structure can change the gas flow direction and drive the impeller to rotate. When the working blade is in operation, it is surrounded by a high-temperature gas flow. To reduce the leakage loss of the aeroengine and improve the sealing effect, it is necessary to machine sealing grooves on the working blade. The sealing grooves are respectively distributed on the upper flange plate and the lower flange plate of the working blade. Since the working blade is usually made of a superalloy with excellent high-temperature strength and hardness, it is difficult to machine it by cutting. Therefore, the electric discharge machining process is mostly used for machining.

[0003] The traditional electric discharge machining process mainly separately machines the sealing grooves on the upper and lower flange plates through the upper and lower flange plate machining electrodes made of copper. That is, the upper flange plate machining electrode is first assembled on the electrode base, and the sealing groove on the upper flange plate is machined first. Then, the lower flange plate machining electrode is replaced, and the sealing groove on the lower flange plate is continuously machined. Since the positions and angles of the sealing grooves on the upper and lower flange plates are different, and the requirements for machining position accuracy and machining precision are very high, the same fixture cannot be used. Therefore, in this machining method, not only does the guide vane need to be reversed, but also the blade fixture needs to be replaced. After the fixture is replaced, it needs to be repositioned. As a result, there is a problem of low machining efficiency. Moreover, frequent replacement easily leads to large fluctuations in precision, affecting the qualified rate of the sealing groove machining. Therefore, according to the above problems, a sealing groove processing device for a turbine working blade is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealing groove processing device for a turbine working blade to solve the problem that the existing sealing groove processing device not only needs to reverse the guide vane when machining the sealing groove of the working blade, but also needs to replace the blade fixture and the machining electrode. After the fixture is replaced, it needs to be repositioned, resulting in low machining efficiency. Moreover, frequent replacement easily leads to large fluctuations in precision, affecting the qualified rate of the sealing groove machining.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A sealing groove machining device for a turbine working blade, comprising a support part, a middle connection part, a fixture module, a turbine blade, and an electric discharge machining main body for carrying the support part, the middle connection part, the fixture module, and the turbine blade. The electric discharge machining main body includes a machine base. On both sides of the upper part of the machine base, machining heads are installed. In the upper side slot of the machine base, a machine tool mounting plate is installed. On the right side of the machine base, a control host is installed. On the upper side of the control host, a warning light is installed. The support part is installed at the machine tool mounting plate. The support part includes a rail block slidably connected to the T-channel of the machine tool mounting plate. On the upper side of the rail block, a base column is fixedly connected and is located above the machine tool mounting plate. On the upper side of the base column, a bearing plate is fixedly connected. On the outer side of the base column, a fixing ring is fixedly connected. In the front and rear threaded holes of the fixing ring, adjusting screws are screwed. The lower ends of the adjusting screws are fixedly connected with pressing blocks that are in close contact with the upper end surface of the machine tool mounting plate. In the left and right curved surfaces of the base column, clamping grooves are opened. The middle connection part is installed on the upper side of the support part. The middle connection part includes a base shell that is horizontally arranged and rotatably connected to the bearing plate. On the upper sides of the left and right grooves of the base shell, longitudinally penetrating rail openings are opened. In the left and right grooves of the base shell, connecting plates are slidably connected. On the upper sides of the connecting plates, rail handles are fixedly connected and are located inside the rail openings. In the left and right grooves of the base shell, a set of two first springs are installed. On the left and right sides of the lower end surface of the base shell, longitudinally penetrating rail grooves are opened. On the lower end surfaces of the connecting plates, connecting rods that are slidably connected to the rail grooves and have different left and right lengths are fixedly connected. The lower ends of the connecting rods are fixedly connected with frames sleeved on the outer side of the base column. Clamping blocks are inserted into the inner sides of the clamping grooves. The right clamping block is fixedly connected to the inner wall of the left frame, and the left clamping block is fixedly connected to the inner wall of the right frame. At the ends of the connecting plates away from the base shell, fixture modules with different adjustment actions are installed. A group of turbine blades are clamped at the left and right fixture modules in different directions. At the output ends of the machining heads, electrode clamps are installed. Below the left electrode clamp, a basin-side machining electrode is installed. Below the right electrode clamp, a back-side machining electrode is installed.

[0007] Preferably, the fixture module includes a housing part, an angle adjustment part, a seat part and a clamping part. The housing part includes an outer frame fixedly connected to the connecting plate. A notch penetrating horizontally is formed inside the outer frame. A rotating hole is formed outside the notch. A double-slot limiting frame located above the rotating hole is fixedly connected to the outside of the outer frame. The angle adjustment part includes a rotating shaft rotatably connected to the rotating hole. One end of the rotating shaft is fixedly connected to a rotating frame located inside the notch. An annular groove is formed inside the circular opening of the rotating frame. Limiting grooves are formed on both the front and rear sides of the circular opening on the end face of the rotating frame close to the middle connecting part. A rail rod is slidably connected inside the sliding groove of the rotating shaft. A first tension spring is fixedly connected between the inner wall of the sliding groove of the rotating shaft and the rail rod. The end of the rail rod away from the rotating frame is fixedly connected to a positioning part that is engaged with the double-slot limiting frame. An adjusting pull block is fixedly connected to the outside of the positioning part. The seat part includes a rotating seat rotatably connected to the circular opening of the rotating frame. A rail ring rotatably connected to the annular groove is fixedly connected to the outside of the rotating seat. Transverse grooves are formed on the end face of the rotating seat close to the middle connecting part. A sliding rod is slidably connected inside the groove. A second tension spring is fixedly connected between the inner wall of the groove and the sliding rod. A clamping bar that is inserted into the limiting groove is fixedly connected to the end of the sliding rod away from the second tension spring. The clamping part includes a main clamping part. The main clamping part is fixedly connected to the side of the rotating seat away from the clamping bar. Threaded rods are fixedly connected to both the front and rear sides of the end face of the clamping teeth of the main clamping part. A secondary clamping part is sleeved outside a group of the threaded rods. Threaded sleeves for tightening the secondary clamping part are spirally connected to the outside of the threaded rods. The turbine blades are all clamped between the clamping teeth of the main clamping part and the secondary clamping part.

[0008] Preferably, the turbine blade includes a clamping part and a blade part fixedly connected to the clamping part. An upper edge plate is fixedly connected to one longitudinal side of the blade part. An upper sealing groove is arranged inside the upper edge plate. A lower edge plate is fixedly connected to the other longitudinal side of the blade part. A lower sealing groove is formed inside the lower edge plate. The upper edge plate of the left turbine blade is arranged upward. The basin-side processing electrode and the upper sealing groove are both vertically perpendicular and aligned up and down. The lower edge plate of the right turbine blade is arranged upward. The lower sealing groove of the right turbine blade is vertically perpendicular and is aligned up and down with the back-side processing electrode.

[0009] Preferably, the rail handle is composed of a rail bar and a handle. The rail bar of the rail handle is slidably connected to the rail opening. A frame opening is formed inside the frame body. The length dimension of the frame opening of the frame body is 2.5 times the diameter dimension of the base column.

[0010] Preferably, vertical grooves and inclined grooves are formed inside the double-groove limiting frame. The positioning member is composed of a disc and an insertion bar. The insertion bar of the right positioning member is inserted into the inclined groove of the double-groove limiting frame, and the insertion bar of the left positioning member is inserted into the vertical groove of the double-groove limiting frame. The slideway and the channel of the rotating shaft are both of square channel structures, and the rail rod and the slide rod are both of square rod structures.

[0011] Preferably, folding channels are formed inside the main clamping members. Sinking grooves are formed on one side of the folding channels close to the auxiliary clamping members. A monitoring module is installed on the upper side of the middle connecting portion. The monitoring module includes a detection portion, an air delivery pipe, a folding pipe, and an elastic pressure bladder. The detection portion includes a seat shell fixedly connected to the upper end surface of the base shell. Through grooves are formed on both the front and rear sides of the seat shell. Pad blocks are fixedly connected to both the front and rear sides of the seat shell and located below the through grooves. Contact buttons are installed on the upper sides of the pad blocks. An air bladder is installed inside the seat shell. A pressing plate arranged above the air bladder is slidably connected inside a set of the through grooves. A frame is fixedly connected to the upper side of the seat shell. A second spring is fixedly connected between the lower end surface of the plate body of the frame and the upper end surface of the pressing plate. Air delivery pipes are communicated with both the left and right sides of the air bladder. The ends of the air delivery pipes far from the air bladder are both communicated with folding pipes. The folding pipes all pass through the rotating seat and are fixedly connected to the folding channels. The ends of the folding pipes far from the air delivery pipes are communicated with elastic pressure bladders located inside the sinking grooves.

[0012] Preferably, the pressing plate is composed of a circular plate and a pressing block. The diameter dimension of the circular plate of the pressing plate is the same as the inner diameter dimension of the seat shell. The circular plate of the pressing plate fits against the inner wall of the seat shell. The pressing blocks of the pressing plate are all arranged above the contact buttons. A gap is provided between the pressing blocks of the pressing plate and the contact buttons. The contact buttons are electrically connected to the control host, and the control host is electrically connected to the warning lamp.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, through structures such as the support part, the middle connection part, and the fixture module, the support part is used to support and install the middle connection part on the machine tool mounting plate, and the middle connection part is used to position the fixture modules on both sides. The positions of the fixture modules on both sides can also be replaced according to needs. The fixture module can clamp the turbine blade in different clamping states, with the right turbine blade having the back side of the blade facing up and the left turbine blade having the concave side of the blade facing up. The clamping state of the fixture module can be converted according to the position of the sealing groove to be machined, so as to adjust the position orientation of the turbine blades on both sides to adapt to the position angle required for the sealing groove to be machined. The first clamping state is used for machining the lower sealing groove on the back side of the turbine blade, and the second clamping state is used for machining the upper sealing groove on the concave side of the turbine blade. After the left and right machining heads machine the sealing grooves on the concave and back sides of the left and right turbine blades, the clamping states of the left and right fixture modules can be adjusted to adjust the transformation of each turbine blade to another state. Then, by rotating the middle connection part, the positions of the left and right turbine blades are swapped, and the sealing grooves are machined on the unprocessed side of the turbine blade by the machining heads on both sides. In this way, neither the fixture needs to be replaced nor the turbine blade needs to be removed, and there is no need to frequently replace the machining electrode. While ensuring the machining efficiency, it can avoid the impact on the machining accuracy caused by disassembly, realizing that the sealing groove machining device can machine the sealing grooves on the concave and back sides of the turbine working blades on both sides by installing the machining electrodes for the concave and back sides of the sealing groove with corresponding shapes. Through the adjustment of the adjustable fixture, the turbine blades on both sides can be adjusted to meet the machining requirements of the sealing groove to be machined on the other side. After the position is swapped, the sealing grooves are machined on the unprocessed side of the turbine blade, thereby improving the machining efficiency and machining qualification rate of the sealing grooves of the working blades, and solving the problem that the existing sealing groove machining device not only needs to reverse the guide blade when machining the sealing groove of the working blade, but also needs to replace the blade fixture and the machining electrode. After the fixture is replaced, it needs to be repositioned, resulting in low machining efficiency, and frequent replacement is likely to cause large fluctuations in accuracy, affecting the machining qualification rate of the sealing groove;

[0015] 2. In the present invention, through structures such as the clamping part and the monitoring module, the clamping part is used for clamping and fixing the turbine blade, and the monitoring module can monitor the clamping of the clamping teeth part. The monitoring process is as follows: If the clamping part does not firmly clamp the turbine blade, there will be looseness and gaps between the main clamping part and the auxiliary clamping part, and the gap distance between the main clamping part and the auxiliary clamping part will cause the elastic bladder to have room to enter external gas. At this time, under the influence of the elastic force of the second spring, the pressure plate will move downward to squeeze the airbag, so that the gas in the airbag enters the elastic bladder through the air delivery pipe and the folding pipe. Due to the reduction of the gas in the airbag, the airbag will contract, enabling the pressure plate to move downward to activate the contact button, and send a control signal to the control host through the contact button to make the warning light alarm the staff, avoiding the situation that the fixed turbine blade shakes during processing due to the looseness or improper installation and fixation of the clamping part, affecting the processing accuracy. It realizes that the sealing groove processing device can monitor the fixing situation of the turbine blade to be processed, avoid the turbine blade shaking during processing and affecting the processing accuracy, and solves the problem that the existing sealing groove processing device generally uses bolts and nuts to fasten the working blade to be processed. Since it is manually operated, there may be a situation where the fastening degree is insufficient when fixing the working blade, which may cause the turbine blade to shake during processing and affect the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 is a schematic diagram of the structure at location A of the present invention;

[0018] Figure 3 is a schematic diagram of the structure of the EDM main body of the present invention;

[0019] Figure 4 is a schematic diagram of the structure at the machine tool mounting plate of the present invention;

[0020] Figure 5 For the present invention Figure 4 is a schematic diagram of the structure from another perspective without the machine tool mounting plate of the present invention;

[0021] Figure 6 is a schematic diagram of the structure of the support part of the present invention;

[0022] Figure 7 is a schematic diagram of the structure of the connection part in the present invention;

[0023] Figure 8 For the present invention Figure 7 is a schematic diagram of the bottom view structure of the present invention;

[0024] Figure 9 is a schematic diagram of the first clamping state structure of the fixture module of the present invention;

[0025] Figure 10 is a schematic structural view of the housing part of the present invention;

[0026] Figure 11 is a schematic structural view of the corner adjustment part of the present invention;

[0027] Figure 12 is a schematic cross-sectional structural view of the corner adjustment part of the present invention;

[0028] Figure 13 is a schematic cross-sectional structural view of the seat part and the clamping part of the present invention;

[0029] Figure 14 of the present invention Figure 13 schematic structural view of the seat part;

[0030] Figure 15 of the present invention Figure 13 schematic structural view of the clamping part;

[0031] Figure 16 is a schematic structural view of the second clamping state of the fixture module of the present invention;

[0032] Figure 17 is a schematic structural view of the left blade basin side orientation and the right blade back side orientation of the turbine blade of the present invention;

[0033] Figure 18 of the present invention Figure 16 schematic structural view of another perspective;

[0034] Figure 19 is a schematic structural view of the monitoring module of the present invention;

[0035] Figure 20 is a schematic structural view of the detection part of the present invention.

[0036] In the figure: 1. EDM main body; 11. Machine base; 12. Machining head; 13. Machine tool mounting plate; 14. Control host; 15. Warning lamp; 2. Support part; 21. Rail block; 22. Base column; 23. Bearing plate; 24. Fixed ring; 25. Adjusting screw; 26. Tightening block; 27. Card slot; 3. Middle connection part; 31. Base shell; 32. Rail opening; 33. Connecting plate; 34. Rail handle; 35. First spring; 36. Rail groove; 37. Connecting rod; 38. Frame; 39. Card block; 4. Fixture module; 41. Outer shell part; 411. Outer frame; 412. Slot opening; 413. Rotating hole; 414. Double-slot limiting frame; 42. Angle adjusting part; 421. Rotating shaft; 422. Rotating frame; 423. Ring groove; 424. Limiting slot; 425. Rail rod; 426. First tension spring; 427. Positioning part; 428. Adjusting pull block; 43. Seat part; 431. Rotating seat; 432. Rail ring; 433. Channel; 434. Slide bar; 435. Second tension spring; 436. Card strip; 44. Clamping part; 441. Main clamping part; 442. Lead screw; 443. Sub-clamping part; 444. Threaded sleeve; 445. Folding path; 446. Sunk groove; 5. Turbine blade; 51. Clamping part; 52. Blade part; 53. Upper edge plate; 54. Upper sealing groove; 55. Lower edge plate; 56. Lower sealing groove; 6. Electrode fixture; 7. Basin side machining electrode; 8. Back side machining electrode; 9. Monitoring module; 91. Detection part; 911. Seat shell; 912. Notch; 913. Pad block; 914. Contact button; 915. Airbag; 916. Pressure plate; 917. Frame; 918. Second spring; 92. Air delivery pipe; 93. Folding pipe; 94. Elastic pressure bladder. Detailed implementation manner

[0037] Please refer to Figures 1 - 20 , the present invention provides a technical solution:

[0038] A sealing groove machining device for a turbine working blade, comprising a support part 2, a middle connection part 3, a fixture module 4, a turbine blade 5, and an electric discharge machining main body 1 for carrying the support part 2, the middle connection part 3, the fixture module 4, and the turbine blade 5. The electric discharge machining main body 1 includes a machine base 11. On both sides of the upper part of the machine base 11, machining heads 12 are installed. In the upper side slot of the machine base 11, a machine tool mounting plate 13 is installed. On the right side of the machine base 11, a control main unit 14 is installed. On the upper side of the control main unit 14, a warning light 15 is installed. The support part 2 is installed at the machine tool mounting plate 13. The support part 2 includes a rail block 21 slidably connected to the T-channel of the machine tool mounting plate 13. On the upper side of the rail block 21, a base column 22 located above the machine tool mounting plate 13 is fixedly connected. On the upper side of the base column 22, a bearing plate 23 is fixedly connected. On the outer side of the base column 22, a fixing ring 24 is fixedly connected. In the front and rear threaded holes of the fixing ring 24, adjusting screws 25 are screwed. At the lower ends of the adjusting screws 25, tight blocks 26 closely fitting the upper end surface of the machine tool mounting plate 13 are fixedly connected. In the left and right curved surfaces of the base column 22, clamping grooves 27 are opened. The middle connection part 3 is installed on the upper side of the support part 2. The middle connection part 3 includes a base shell 31 horizontally arranged and rotatably connected to the bearing plate 23. On the upper sides of the left and right grooves of the base shell 31, longitudinally penetrating rail openings 32 are opened. In the left and right grooves of the base shell 31, connecting plates 33 are slidably connected. On the upper sides of the connecting plates 33, rail handles 34 located inside the rail openings 32 are fixedly connected. In the left and right grooves of the base shell 31, a group of two first springs 35 are installed. On the left and right sides of the lower end surface of the base shell 31, longitudinally penetrating rail grooves 36 are opened. At the lower end surfaces of the connecting plates 33, connecting rods 37 slidably connected to the rail grooves 36 and different in length from left to right are fixedly connected. At the lower ends of the connecting rods 37, frames 38 sleeved on the outer side of the base column 22 are fixedly connected. Inside the clamping grooves 27, clamping blocks 39 are inserted. The right clamping block 39 is fixedly connected to the inner wall of the left frame 38, and the left clamping block 39 is fixedly connected to the inner wall of the right frame 38. At the ends of the connecting plates 33 away from the base shell 31, fixture modules 4 with different adjustment actions are installed. A group of turbine blades 5 are clamped at the left and right fixture modules 4 in different directions. At the output ends of the machining heads 12, electrode fixtures 6 are installed. Below the left electrode fixture 6, a basin-side machining electrode 7 is installed. Below the right electrode fixture 6, a back-side machining electrode 8 is installed. The fixture module 4 includes a housing part 41, an angle adjustment part 42, a seat part 43, and a clamping part 44. The housing part 41 includes an outer frame 411 fixedly connected to the connecting plate 33. Inside the outer frame 411, a horizontally penetrating slot 412 is opened. Outside the slot 412, a rotating hole 413 is opened. On the outer side of the outer frame 411, a double-slot limiting frame 414 located above the rotating hole 413 is fixedly connected. The angle adjustment part 42 includes a rotating shaft 421 rotatably connected to the rotating hole 413. At one end of the rotating shaft 421, a rotating frame 422 located inside the slot 412 is fixedly connected. Inside the circular opening of the rotating frame 422, an annular groove 423 is opened.On one end face of the side of the rotating frame 422 close to the middle connecting part 3, limiting grooves 424 are opened on both the front and rear sides of the circular opening. A rail rod 425 is slidably connected in the slideway of the rotating shaft 421. A first tension spring 426 is fixedly connected between the inner wall of the slideway of the rotating shaft 421 and the rail rod 425. One end of the rail rod 425 away from the rotating frame 422 is fixedly connected with a positioning member 427 that is engaged with the double-groove limiting frame 414. An adjusting pull block 428 is fixedly connected to the outside of the positioning member 427. The seat part 43 includes a rotating seat 431 that is rotatably connected to the circular opening of the rotating frame 422. A rail ring 432 that is rotatably connected to the annular groove 423 is fixedly connected to the outside of the rotating seat 431. Transverse channels 433 are opened on one end face of the rotating seat 431 close to the middle connecting part 3. A sliding rod 434 is slidably connected to the inside of the channel 433. A second tension spring 435 is fixedly connected between the inner wall of the channel 433 and the sliding rod 434. One end of the sliding rod 434 away from the second tension spring 435 is fixedly connected with a clamping strip 436 that is clamped inside the limiting groove 424. The clamping part 44 includes a main clamping member 441. A main clamping member 441 is fixedly connected to one side of the rotating seat 431 away from the clamping strip 436. Threaded rods 442 are fixedly connected to both the front and rear sides of the end face of the clamping teeth of the main clamping member 441. A secondary clamping member 443 is sleeved on the outside of a group of threaded rods 442. Threaded sleeves 444 for tightening the secondary clamping member 443 are screwed on the outside of the threaded rods 442. The turbine blades 5 are all clamped between the clamping teeth of the main clamping member 441 and the secondary clamping member 443. Through this setting, the fixture module 4 can clamp the turbine blades 5 in different clamping states, making the right turbine blade 5 have its back side facing up and the left turbine blade 5 have its basin side facing up, and can convert the clamping state of the fixture module 4 according to the position of the sealing groove to be machined, so as to adjust the position and orientation of the two turbine blades 5 to adapt to the position angle required for the sealing groove to be machined; The turbine blade 5 includes a clamping part 51 and a blade part 52 fixedly connected to the clamping part 51. An upper edge plate 53 is fixedly connected to one longitudinal side of the blade part 52. An upper sealing groove 54 is arranged inside the upper edge plate 53. A lower edge plate 55 is fixedly connected to the other longitudinal side of the blade part 52. A lower sealing groove 56 is opened inside the lower edge plate 55. The upper edge plate 53 of the left turbine blade 5 is arranged upward. The basin-side machining electrode 7 and the upper sealing groove 54 are both vertically perpendicular and aligned up and down. The lower edge plate 55 of the right turbine blade 5 is arranged upward. The lower sealing groove 56 of the right turbine blade 5 is vertically perpendicular, and is aligned up and down with the back-side machining electrode 8. Through this setting, the positions of the respective sealing grooves of the left and right turbine blades 5 are shown, so that after the basin-side machining electrode 7 and the back-side machining electrode 8 are vertically displaced downward, the corresponding upper sealing groove 54 and lower sealing groove 56 can be machined; The rail handle 34 is composed of a rail strip and a handle. Through this setting, it is convenient for the staff to control the displacement. The rail strip of the rail handle 34 is slidably connected to the rail opening 32. Through this setting, the rail handle 34 remains stable during displacement. An inner frame opening is opened inside the frame body 38. The length dimension of the frame opening of the frame body 38 is 2.5 times the diameter dimension of the base column 22.With this setting, a margin is left for the frame body 38 to displace outside the base column 22; a vertical groove and an inclined groove are provided inside the double-groove limiting frame 414. The positioning member 427 is composed of a disc and an insertion bar. The insertion bar of the right positioning member 427 is inserted into the inclined groove of the double-groove limiting frame 414, and the insertion bar of the left positioning member 427 is inserted into the vertical groove of the double-groove limiting frame 414. With this setting, the positioning member 427 can be positioned in different groove positions of the double-groove limiting frame 414 to meet the needs of different clamping states. The slideway and the channel 433 of the rotating shaft 421 are both square-channel structures, and the rail rod 425 and the slide rod 434 are both square-rod structures. With this setting, the rail rod 425 can drive the rotating shaft 421 to rotate, and the slide rod 434 can drive the rotating seat 431 to rotate.,

[0039] Such as Figure 2 , Figure 13 , Figures 19 - 20As shown, folding channels 445 are provided on the inner sides of the main clamping members 441. Sinking grooves 446 are provided on the sides of the folding channels 445 close to the auxiliary clamping members 443. A monitoring module 9 is installed on the upper side of the middle connecting portion 3. The monitoring module 9 includes a detection portion 91, an air delivery pipe 92, a folding pipe 93, and an elastic airbag 94. The detection portion 91 includes a base shell 911 fixedly connected to the upper end surface of the base shell 31. Notch grooves 912 are provided on the front and rear sides of the base shell 911. Cushion blocks 913 are fixedly connected to the front and rear sides of the base shell 911 and are located below the notch grooves 912. Contact buttons 914 are installed on the upper sides of the cushion blocks 913. An airbag 915 is installed inside the base shell 911. A pressing plate 916 provided above the airbag 915 is slidably connected inside a set of notch grooves 912. A frame 917 is fixedly connected to the upper side of the base shell 911. A second spring 918 is fixedly connected between the lower end surface of the plate body of the frame 917 and the upper end surface of the pressing plate 916. Air delivery pipes 92 are communicated with both the left and right sides of the airbag 915. One ends of the air delivery pipes 92 far from the airbag 915 are communicated with folding pipes 93. The folding pipes 93 all pass through the rotating seat 431 and are fixedly connected to the folding channels 445. One ends of the folding pipes 93 far from the air delivery pipes 92 are communicated with elastic airbags 94 located inside the sinking grooves 446. Through this setting, the clamping portion 44 is used for clamping and fixing the turbine blade 5, and the monitoring module 9 can monitor the clamping of the clamping portion 44 to prevent the turbine blade 5 from shaking during processing and affecting the processing accuracy; the pressing plate 916 is composed of a circular plate and a pressing block. The diameter size of the circular plate of the pressing plate 916 is the same as the inner diameter size of the base shell 911. The circular plate of the pressing plate 916 fits against the inner wall of the base shell 911. Through this setting, the pressing plate 916 can completely press down the airbag 915. The pressing blocks of the pressing plate 916 are all provided above the contact buttons 914. A gap is provided between the pressing blocks of the pressing plate 916 and the contact buttons 914. Through this setting, when the clamping portion 44 is not loose, the normal contact buttons 914 will not contact the pressing plate 916. The contact buttons 914 are electrically connected to the control host 14, and the control host 14 is electrically connected to the warning lamp 15. Through this setting, the contact buttons 914 can send control signals to the control host 14 to make the warning lamp 15 alarm the staff.

[0040] Workflow: The processing operation of the seal groove machining device on the seal groove of the turbine working blade is as follows. Note 1: The shape of the machining electrode 7 on the concave side is the same as that of the upper seal groove 54 to be machined, and the shape of the machining electrode 8 on the convex side is the same as that of the lower seal groove 56 to be machined. Note 2: All electrical appliances in this solution are externally powered and are controlled by the control host 14. Note 3: The operation of swapping the positions of the left and right fixture modules 4 and the turbine blade 5 by the middle connection part 3 is as follows. Hold the rail handles 34 on both sides with both hands and displace a set of rail handles 34 towards each other, so that the connection plates 33 on both sides are displaced towards each other. The displacement of a set of connection plates 33 can, on the one hand, drive the fixture modules 4 and the turbine blade 5 on both sides to move towards each other, so that there is no interference from the machine base 11 during subsequent rotation. On the other hand, it can drive a set of connecting rods 37 and the frame 38 to move towards each other, and the displacement of the frame 38 will drive the block 39 to disengage from the card slot 27, so that the block 39 and the card slot 27 no longer restrict the rotation of the middle connection part 3. At this time, rotate the middle connection part 3 by 180 degrees to swap the positions of the left and right fixture modules 4 and the turbine blade 5. After rotation, release the rail handles 34, and the elastic force of the first spring 35 displaces the connection plates 33, so that the fixture modules 4 and the turbine blade 5 move away from each other to reset, and the connecting rods 37 and the frame 38 move away from each other to reset. The displacement of the frame 38 will drive the block 39 to snap into the card slot 27 to complete the positioning of the middle connection part 3 and also complete the position swapping of the left and right fixture modules 4 and the turbine blade 5. Note 4: The right processing head 12 and the machining electrode 8 on the convex side only machine the lower seal groove 56 on the convex side of the turbine blade 5, and the left processing head 12 and the machining electrode 7 on the concave side only machine the upper seal groove 54 on the concave side of the turbine blade 5;First, the support portion 2 is used to support and install the middle connection portion 3 on the machine tool mounting plate 13. The middle connection portion 3 is used to position the fixture modules 4 on both sides. The positions of the fixture modules 4 on both sides can be replaced as needed. The fixture module 4 can clamp the turbine blade 5 in different clamping states, with the right turbine blade 5 having its back side facing up and the left turbine blade 5 having its basin side facing up. The clamping state of the fixture module 4 can be switched according to the position of the sealing groove to be machined, so as to adjust the position and orientation of the turbine blades 5 on both sides to adapt to the position angle required for the sealing groove to be machined. The actual operation is as follows: First, install the turbine blades 5 on both sides. First, loosen the wire sleeve 444 of the clamping portion 44 so that the main clamping member 441 and the sub-clamping member 443 can be loosened and separated. At this time, place the turbine blade 5 between the clamping teeth of the main clamping member 441 and the sub-clamping member 443. After aligning the clamping portion 51 of the turbine blade 5 with the front and rear end faces of the main clamping member 441 and the sub-clamping member 443, tighten the wire sleeve 444 to fasten the main clamping member 441 and the sub-clamping member 443, so that the main clamping member 441 and the sub-clamping member 443 clamp the turbine blade 5, thus completing the installation and fixation of the turbine blades 5 on both sides. Then, it is necessary to adjust the position and angle of the turbine blade 5 according to the position of the sealing groove to be machined on the turbine blade 5. The back processing electrode 8 installed on the right processing head 12 is used to machine the lower sealing groove 56 of the turbine blade 5. Therefore, it is necessary to adjust the lower edge plate 55 of the right turbine blade 5 to the upper side through the right fixture module 4. Also, because the to-be-machined lower sealing groove 56 is at an inclined angle rather than a vertical angle, in order to allow the back processing electrode 8 to perform vertical machining, it is also necessary to tilt the right turbine blade 5 so that the back processing electrode 8 can move downward through the right processing head 12 to machine the lower sealing groove 56 (such as; Figure 9As shown in the figure, the lower sealing groove 56 to be processed after the turbine blade 5 is tilted is in a vertical direction, so that the back side processing electrode 8 can process the lower sealing groove 56 after moving downward), completing the back side processing of the right turbine blade 5, and the basin side processing electrode 7 installed on the left processing head 12 is used to process the upper sealing groove 54 of the turbine blade 5. Therefore, it is necessary to adjust the upper edge plate 53 of the left turbine blade 5 to the upper side through the left clamp module 4. Since the upper sealing groove 54 to be processed is at a vertical angle, the basin side processing electrode 7 can be moved downward by the left processing head 12 to process the upper sealing groove 54, completing the blade basin side processing of the left turbine blade 5. In view of the back side and basin side processing requirements of the turbine blade 5, the clamp module 4 needs to be clamped in two states. The left and right turbine blades 5 are clamped and fixed at different directions and angles, and the two clamping states can be converted to each other. The conversion operation from the second clamping state to the first clamping state is as follows: first, the positioning member 427 is pulled out of the vertical slot of the double-slot limit frame 414 by adjusting the pull block 428, and then the positioning member 427 and the rail rod 425 are driven to rotate by rotating the adjusting pull block 428. The rotation of the rail rod 425 will drive the rotation shaft 421 and the rotating frame 422 to rotate, and then drive the seat 43 and the clamping part 44 to rotate, so that the right turbine blade 5 clamped and fixed by the clamping part 44 is tilted. After the right turbine blade 5 is tilted to a suitable angle, the adjusting pull block 428 is released to reset it through the tension of the first tension spring 426, so that the insert strip of the positioning member 427 is inserted into the double-slot limit frame 41 4 is used to position the inclination of the right turbine blade 5, and then the clamping strip 436 is pulled outward to make the clamping strip 436 disengage from the limiting groove 424. At this time, the clamping strip 436 can be rotated 180 degrees, and the rotation of the clamping strip 436 will drive the rotating seat 431 and the clamping part 44 to rotate 180 degrees through the sliding rod 434. After the rotation is completed, the clamping strip 436 is released to reset through the second tension spring 435, so that the clamping strip 436 is re-engaged in the limiting groove 424 for limiting, and the rotation of the clamping part 44 can drive the turbine blade 5 to rotate, so that the back side of the turbine blade 5 is upward, and the lower edge plate 55 of the turbine blade 5 is upward, completing the processing preparation work of the lower sealing groove 56, and completing the transformation from the second clamping state to the first clamping state, and the first clamping state The transition from the state to the second clamping state can be reset through the above operation. The first clamping state is used for processing the lower sealing groove 56 on the back side of the turbine blade 5, and the second clamping state is used for processing the upper sealing groove 54 on the blade basin side of the turbine blade 5. After the left and right processing heads 12 process the sealing grooves on the blade basin and back sides of the left and right turbine blades 5, the clamping state of the left and right clamp modules 4 can be adjusted to adjust each turbine blade 5 to another state, and then the positions of the left and right turbine blades 5 are swapped by rotating the middle connecting part 3, and the sealing grooves on the unprocessed side of the turbine blade 5 are processed by the processing heads 12 on both sides and the corresponding processing electrodes, so that there is no need to replace the fixture or remove the turbine blade 5, and there is no need to frequently replace the processing electrodes.While ensuring the processing efficiency, it can avoid the impact on the processing accuracy caused by disassembly. The seal groove processing device can process the seal grooves on the blade platform side and blade back side of both turbine working blades simultaneously by installing the corresponding-shaped seal groove processing electrodes on the blade platform side and blade back side. Then, through the adjustment of the adjustable fixture, the two turbine blades 5 can be adjusted to meet the processing requirements of the seal groove on the other side to be processed. After the position is swapped, the seal groove on the unprocessed side of the turbine blade 5 is processed, thereby improving the processing efficiency and qualified rate of the seal grooves of the working blades. It should be noted that the clamping part 44 is used for clamping and fixing the turbine blade 5, and the monitoring module 9 can monitor the clamping of the clamping part 44. The monitoring process is as follows: if the clamping part 44 does not firmly clamp the turbine blade 5, there will be looseness and gaps between the main clamping part 441 and the auxiliary clamping part 443. The gap distance between the main clamping part 441 and the auxiliary clamping part 443 will cause the elastic bladder 94 to have room for external gas to enter. At this time, under the influence of the elastic force of the second spring 918, the pressure plate 916 will move downward to squeeze the airbag 915, so that the gas in the airbag 915 enters the elastic bladder 94 through the air delivery pipe 92 and the folding pipe 93. Due to the reduction of the gas in the airbag 915, the airbag 915 will contract, enabling the pressure plate 916 to move downward to activate the contact button 914, and send a control signal to the control host 14 through the contact button 914 to alarm the staff through the warning light 15, avoiding the looseness or improper installation and fixation of the clamping part 44, which may cause the fixed turbine blade 5 to shake during processing and affect the processing accuracy, so that the seal groove processing device can monitor the fixing situation of the turbine blade 5 to be processed and avoid the turbine blade 5 shaking during processing and affecting the processing accuracy.

[0041] In this article, specific examples are used to elaborate on the principles and implementation methods of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that due to the limited nature of written expression and the objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A sealing groove machining device for a turbine blade, comprising a support portion (2), a middle connection portion (3), a fixture module (4), a turbine blade (5), and an electrospark machining body (1) for supporting the support portion (2), the middle connection portion (3), the fixture module (4), and the turbine blade (5), characterized in that: The electrospark machining body (1) comprises a machine base (11), machining heads (12) are mounted on both sides of the upper part of the machine base (11), a machine tool mounting plate (13) is mounted in the upper slot of the machine base (11), a control host (14) is mounted on the right side of the machine base (11), a warning light (15) is mounted on the upper side of the control host (14), the support part (2) is mounted on the machine tool mounting plate (13), the support part (2) comprises a rail block (21) slidably connected to a T-track of the machine tool mounting plate (13), the upper side of the rail block (21) is fixedly connected to a base column (22) located on the upper side of the machine tool mounting plate (13), the base column (22) The upper side of the base column (22) is fixedly connected to a bearing plate (23), the outer side of the base column (22) is fixedly connected to a fixing ring (24), the front and rear threaded holes of the fixing ring (24) are both spirally connected to adjusting screws (25), the lower ends of the adjusting screws (25) are fixedly connected to a tightening block (26) that is tightly fitted with the upper end surface of the machine tool mounting plate (13), the left and right curved surfaces of the base column (22) are both provided with a card slot (27), the middle connection part (3) is mounted on the upper side of the support part (2), the middle connection part (3) comprises a base shell (31) that is rotatably connected to the bearing plate (23) and is arranged in a horizontal direction, and the upper sides of the left and right grooves of the base shell (31) are both provided with a longitudinally penetrating The left and right grooves of the base shell (31) are both slidably connected with connecting plates (33), and the upper sides of the connecting plates (33) are fixedly connected with rail handles (34) located on the inner side of the rail mouth (32). A group of two first springs (35) are installed in the left and right grooves of the base shell (31). The left and right sides of the lower end surface of the base shell (31) are provided with rail grooves (36) that penetrate longitudinally. The lower end surfaces of the connecting plates (33) are fixedly connected with connecting rods (37) that are slidably connected with the rail grooves (36) and have different lengths on the left and right sides. The lower ends of the connecting rods (37) are fixedly connected with a frame (38) that is sleeved on the outer side of the base column (22). The card A clamping block (39) is inserted into the inner side of each groove (27); the clamping block (39) on the right side is fixedly connected to the inner wall of the left side frame (38); the clamping block (39) on the left side is fixedly connected to the inner wall of the right side frame (38); a clamping module (4) with different adjustment actions is installed at one end of each connecting plate (33) away from the base shell (31); a group of turbine blades (5) are clamped at the left and right clamping modules (4) in different directions; an electrode clamp (6) is installed at the output end of each processing head (12); a basin side processing electrode (7) is installed at the lower side of the left electrode clamp (6); and a back side processing electrode (8) is installed at the lower side of the right electrode clamp (6).

2. The sealing groove processing device for a turbine working blade according to claim 1, characterized in that: The clamp module (4) comprises an outer shell (41), an angle adjustment portion (42), a seat portion (43) and a clamping portion (44); the outer shell (41) comprises an outer frame (411) fixedly connected to the connecting plate (33); a slot (412) extending transversely therethrough is provided on the inner side of the outer frame (411); a rotation hole (413) is provided on the outer side of the slot (412); a double-slot limit frame (414) located on the upper side of the rotation hole (413) is fixedly connected to the outer side of the outer frame (411); the angle adjustment portion (42) comprises a rotating shaft (421) rotatably connected to the rotation hole (413); one end of the rotating shaft (421) is fixedly connected to a stopper located on the slot (414); A rotating frame (422) is disposed inside the opening (412), an annular groove (423) is provided inside the circular opening of the rotating frame (422), and limiting grooves (424) are provided on both the front and rear sides of the circular opening of the end surface of one side of the rotating frame (422) close to the middle connecting portion (3), a rail rod (425) is slidably connected in the slideway of the rotating shaft (421), a first tension spring (426) is fixedly connected between the inner wall of the slideway of the rotating shaft (421) and the rail rod (425), a positioning member (427) engaged with the double-groove limiting frame (414) is fixedly connected at one end of the rail rod (425) away from the rotating frame (422), and the outer side of the positioning member (427) is fixedly connected to the rotating frame (422). The seat (43) is connected to an adjusting pull block (428), the seat (43) includes a rotating seat (431) rotatably connected to the round mouth of the rotating frame (422), the outer side of the rotating seat (431) is fixedly connected to a rail ring (432) rotatably connected to the ring groove (423), the end surface of one side of the rotating seat (431) close to the middle connecting portion (3) is provided with a transversely arranged groove (433), the inner side of the groove (433) is slidably connected to a slide rod (434), a second tension spring (435) is fixedly connected between the inner wall of the groove (433) and the slide rod (434), and the end of the slide rod (434) away from the second tension spring (435) is fixedly connected to A clamping strip (436) is connected to the inner side of the limiting groove (424), and the clamping portion (44) includes a main clamping member (441). The main clamping member (441) is fixedly connected to the side of the rotating seat (431) away from the clamping strip (436). The front and rear sides of the end surface of one side of the clamping teeth of the main clamping member (441) are fixedly connected to screw rods (442). A group of screw rods (442) are sleeved on the outer side of the auxiliary clamping member (443). The outer side of the screw rods (442) is spirally connected to a screw sleeve (444) for fastening the auxiliary clamping member (443). The turbine blades (5) are clamped between the clamping teeth of the main clamping member (441) and the auxiliary clamping member (443).

3. The sealing groove processing device for a turbine blade according to claim 2, characterized in that: The turbine blade (5) comprises a clamping portion (51) and a blade portion (52) fixedly connected to the clamping portion (51); an upper edge plate (53) is fixedly connected to one longitudinal side of the blade portion (52); an upper sealing groove (54) is provided on the inner side of the upper edge plate (53); a lower edge plate (55) is fixedly connected to the other longitudinal side of the blade portion (52); a lower sealing groove (56) is provided on the inner side of the lower edge plate (55); the upper edge plate (53) of the turbine blade (5) on the left side is arranged upward, the basin side processing electrode (7) and the upper sealing groove (54) are both arranged vertically and aligned vertically; the lower edge plate (55) of the turbine blade (5) on the right side is arranged upward, the lower sealing groove (56) of the turbine blade (5) on the right side is arranged vertically and aligned vertically with the back side processing electrode (8).

4. The sealing groove processing device for a turbine blade according to claim 2, characterized in that: The rail handle (34) is composed of a rail bar and a handle, the rail bar of the rail handle (34) is slidably connected to the rail opening (32), a frame opening is provided on the inner side of the frame body (38), and the length of the frame opening of the frame body (38) is 2.5 times the diameter of the base column (22).

5. The sealing groove processing device for a turbine blade according to claim 2, characterized in that: A vertical groove and an inclined groove are provided on the inner side of the double-groove limit frame (414); the positioning member (427) is composed of a disc and an inserting strip; the inserting strip of the positioning member (427) on the right side is inserted into the inclined groove of the double-groove limit frame (414); and the inserting strip of the positioning member (427) on the left side is inserted into the vertical groove of the double-groove limit frame (414); the slideway and the groove (433) of the rotating shaft (421) are both square track structures; and the rail rod (425) and the slide rod (434) are both square rod structures.

6. The sealing groove processing device for a turbine blade according to claim 2, characterized in that: The inner side of the main clamp (441) is provided with a folding channel (445), and a side of the folding channel (445) close to the auxiliary clamp (443) is provided with a sink groove (446). A monitoring module (9) is installed on the upper side of the middle connecting part (3), and the monitoring module (9) comprises a detection part (91), an air supply pipe (92), a folding pipe (93) and an elastic pressure bag (94). The detection part (91) comprises a seat shell (911) fixedly connected to the upper end surface of the base shell (31), and the seat shell (911) has slots (912) on both the front and rear sides. The seat shell (911) is fixedly connected with a pad (913) located at the lower side of the slot (912) on both the front and rear sides. A contact button (914) is installed on the upper side of the pad (913). The seat shell (911) is provided with a plurality of contact buttons (914). ) is installed on the inner side of the airbag (915), a group of the inner sides of the slots (912) are slidably connected to a pressure plate (916) arranged on the upper side of the airbag (915), a frame (917) is fixedly connected to the upper side of the seat shell (911), a second spring (918) is fixedly connected between the lower end surface of the plate body of the frame (917) and the upper end surface of the pressure plate (916), the left and right sides of the airbag (915) are connected to an air supply pipe (92), the end of the air supply pipe (92) away from the airbag (915) is connected to a folded tube (93), the folded tube (93) passes through the rotating seat (431) and is fixedly connected to the folded channel (445), and the end of the folded tube (93) away from the air supply pipe (92) is connected to an elastic pressure bag (94) located on the inner side of the sink (446).

7. The sealing groove processing device for turbine working blades according to claim 6, characterized in that: The pressure plate (916) is composed of a circular plate and a pressure block. The diameter of the circular plate of the pressure plate (916) is the same as the inner diameter of the seat shell (911). The circular plate of the pressure plate (916) fits the inner wall of the seat shell (911). The pressure blocks of the pressure plate (916) are arranged on the upper side of the contact button (914). A gap is arranged between the pressure blocks of the pressure plate (916) and the contact button (914). The contact button (914) is electrically connected to the control host (14), and the control host (14) is electrically connected to the warning light (15).

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