Turbine working blade sealing groove machining device

Abstract

The invention relates to the technical field of metal machining, in particular to a turbine working blade sealing groove machining device which comprises a supporting part, a middle connecting part, a clamp module, a turbine blade and an electric spark machining body for bearing the supporting part, the middle connecting part, the clamp module and the turbine blade. According to the sealing groove machining device, through the arrangement of the supporting part, the middle connecting part, the clamp module and other structures, the sealing groove machining device can machine blade basin side sealing grooves and blade back side sealing grooves of turbine working blades on the two sides at the same time by installing blade basin side sealing groove machining electrodes and blade back side sealing groove machining electrodes of the corresponding shapes; the turbine blades on the two sides can be adjusted towards the machining requirement of the to-be-machined sealing grooves in the other side through adjustment of the adjustable clamp, the sealing grooves are machined in the unmachined sides of the turbine blades after position exchange, and therefore the machining efficiency and the machining qualification rate of the sealing grooves of the working blades are improved.

Description

Technical Field

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

[0002] Turbine working blades are important components of gas turbines and aircraft engines. They usually include a blade body and upper and lower edge plates on both sides of the blade body. Their unique curved structure can change the gas flow direction and drive the impeller to rotate. The working blades are surrounded by high-temperature gas flow when working. In order to reduce the leakage loss of aircraft engines and improve the sealing effect, it is necessary to process sealing grooves on the working blades. The sealing grooves are respectively distributed on the upper and lower edge plates of the working blades. Since the working blades are usually made of high-temperature alloys with excellent high-temperature strength and hardness, it is difficult to cut them, so they are mostly processed by electrospark machining.

[0003] The traditional electrospark machining process mainly uses upper and lower edge plate machining electrodes made of red copper to separately machine the sealing grooves on the upper and lower edge plates, that is, the upper edge plate machining electrode is first assembled on the electrode base, and the sealing groove on the upper edge plate is first machined, and then replaced with the lower edge plate machining electrode to continue machining the sealing groove on the lower edge plate. However, due to the different positions and angles of the sealing grooves of the upper and lower edge plates, and the high machining position and machining accuracy requirements, the same fixture cannot be shared. Therefore, this machining method not only requires reversing the guide vanes, but also requires replacing the blade fixture. After the fixture is replaced, it needs to be realigned, which leads to the problem of low machining efficiency. Frequent replacement is likely to lead to large fluctuations in accuracy, affecting the qualified rate of sealing groove machining. Therefore, based on the above problems, a sealing groove machining device for turbine working blades is proposed. Summary of the invention

[0004] The object of the present invention is to provide a sealing groove processing device for a turbine working blade, so as to solve the problem that the existing sealing groove processing device not only needs to reverse the guide vane when processing the sealing groove of the working blade, but also needs to replace the blade fixture and the processing electrode. After the fixture is replaced, it needs to be realigned, resulting in low processing efficiency, and frequent replacement is likely to cause large fluctuations in accuracy, affecting the sealing groove processing pass rate.

[0005] To achieve the above object, the present invention provides the following technical solutions: A sealing groove processing device for a turbine working blade comprises a support part, a middle connection part, a fixture module, a turbine blade and an electrospark machining body for carrying the support part, the middle connection part, the fixture module and the turbine blade, wherein the electrospark machining body comprises a machine base, a machining head is installed on both sides of the upper part of the machine base, a machine tool mounting plate is installed in the upper slot of the machine base, a control host is installed on the right side of the machine base, a warning light is installed on the upper side of the control host, the support part is installed at the machine tool mounting plate, and the support part comprises a The upper side of the rail block is fixedly connected to a base column on the upper side of the machine tool mounting plate, the upper side of the base column is fixedly connected to a bearing plate, the outer side of the base column is fixedly connected to a fixing ring, the front and rear threaded holes of the fixing ring are spirally connected to adjusting screws, the lower ends of the adjusting screws are fixedly connected to a tightening block that fits tightly with the upper end surface of the machine tool mounting plate, the left and right curved surfaces of the base column are provided with card grooves, the middle connection part is installed on the upper side of the support part, and the middle connection part includes a horizontal connection to the bearing plate A flat base shell, the upper sides of the left and right grooves of the base shell are provided with rail openings that are longitudinally penetrated, the left and right grooves of the base shell are slidably connected with connecting plates, the upper sides of the connecting plates are fixedly connected with rail handles located on the inner side of the rail opening, a group of two first springs are installed in the left and right grooves of the base shell, the left and right sides of the lower end surface of the base shell are provided with rail grooves that are longitudinally penetrated, the lower end surfaces of the connecting plates are fixedly connected with connecting rods that are slidably connected to the rail grooves and have different lengths on the left and right, and the lower ends of the connecting rods are fixedly connected with sleeves In the frame outside the base column, a card block is inserted into the inner side of the card slot, the card block on the right is fixedly connected to the inner wall of the left frame, and the card block on the left is fixedly connected to the inner wall of the right frame. The end of the connecting plate away from the base shell is installed with a clamp module with different adjustment actions, a group of turbine blades are clamped in the left and right clamp modules in different directions, and the output end of the processing head is installed with an electrode clamp, a basin side processing electrode is installed on the lower side of the left electrode clamp, and a back side processing electrode is installed on the lower side of the right electrode clamp.

[0006] Preferably, the clamp module comprises an outer shell part, an angle adjustment part, a seat part and a clamping part, the outer shell part comprises an outer frame fixedly connected to the connecting plate, the inner side of the outer frame is provided with a slot arranged to penetrate horizontally, the outer side of the slot is provided with a rotating hole, the outer side of the outer frame is fixedly connected with a double-slot limit frame on the upper side of the rotating hole, the angle adjustment part comprises a rotating shaft rotatably connected to the rotating hole, one end of the rotating shaft is fixedly connected with a rotating frame on the inner side of the slot, the inner side of the circular mouth of the rotating frame is provided with an annular groove, the end face of one side of the rotating frame close to the middle connecting part has limiting grooves on both sides of the circular mouth, a rail rod is slidably connected in the slideway of the rotating shaft, a first tension spring is fixedly connected between the inner wall of the slideway of the rotating shaft and the rail rod, the end of the rail rod away from the rotating frame is fixedly connected with a positioning piece engaged with the double-slot limit frame, and the outer side of the positioning piece is fixed The cam is an adjustable pull block, and the seat portion comprises a swivel seat rotatably connected to the circular mouth of the swivel seat, and the outer side of the swivel seat is fixedly connected to a rail ring rotatably connected to the annular groove, and the end surface of the swivel seat near the middle connecting portion is provided with a transversely arranged groove, the inner side of the groove is slidably connected with a sliding rod, and the inner wall of the groove is fixedly connected with the second tension spring, and the one end of the sliding rod away from the second tension spring is fixedly connected with a clamping strip clamped in the inner side of the limit groove, and the clamping portion comprises a main clamping part, the side of the swivel seat away from the clamping strip is fixedly connected to the main clamping part, and the front and rear sides of the end surface of one side of the clamping teeth of the main clamping part are fixedly connected to the screw rod, a group of the screw rods are sleeved on the outer side of the screw rods, and the outer side of the screw rods are spirally connected with a screw sleeve for tightening the auxiliary clamp, and the turbine blades are clamped between the clamping teeth of the main clamp and the auxiliary clamp.

[0007] Preferably, the turbine blade includes a clamping portion and a blade portion fixedly connected to the clamping portion, an upper edge plate is fixedly connected to one longitudinal side of the blade portion, an upper sealing groove is arranged on the inner side of the upper edge plate, and a lower edge plate is fixedly connected to the other longitudinal side of the blade portion, a lower sealing groove is arranged on the inner side of the lower edge plate, the upper edge plate of the turbine blade on the left side is arranged upward, the basin-side processing electrode and the upper sealing groove are both longitudinally vertical and aligned up and down, the lower edge plate of the turbine blade on the right side is arranged upward, the lower sealing groove of the turbine blade on the right side is longitudinally vertical, and is aligned up and down with the back-side processing electrode.

[0008] Preferably, the rail handle consists 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 opened on the inner side of the frame body, and the length of the frame opening of the frame body is 2.5 times the diameter of the base column.

[0009] Preferably, a vertical groove and an inclined groove are provided on the inner side of the double-slot limit frame, the positioning piece is composed of a disc and an insert strip, the insert strip of the positioning piece on the right side is inserted into the inclined groove of the double-slot limit frame, and the insert strip of the positioning piece on the left side is inserted into the vertical groove of the double-slot limit frame, the slideway and groove of the rotating shaft are both square track structures, and the rail rod and sliding rod are both square rod structures.

[0010] Preferably, the inner side of the main clamp is provided with a folding channel, and the side of the folding channel close to the auxiliary clamp is provided with a sinking groove, a monitoring module is installed on the upper side of the middle joint, and the monitoring module includes a detection part, an air delivery pipe, a folding pipe and an elastic pressure bag, and the detection part includes a seat shell fixedly connected to the upper end surface of the base shell, and the front and rear sides of the seat shell are provided with slots, and the front and rear sides of the seat shell are fixedly connected with a pad located at the lower side of the slot, and the upper side of the pad is installed with a contact button, and the seat shell An air bag is installed on the inner side, a group of the slots are slidably connected to the inner side with a pressure plate arranged on the upper side of the air bag, 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 pressure plate, the left and right sides of the air bag are connected with an air supply pipe, the end of the air supply pipe away from the air bag is connected with a folded tube, the folded tube passes through the swivel seat and is fixedly connected with the folded channel, and the end of the folded tube away from the air supply pipe is connected with an elastic pressure bag on the inner side of the sink.

[0011] Preferably, the pressure plate is composed of a circular plate and a pressure block. The diameter of the circular plate of the pressure plate is the same as the inner diameter of the seat shell. The circular plate of the pressure plate fits the inner wall of the seat shell. The pressure blocks of the pressure plate are all arranged on the upper side of the contact button. A gap is arranged between the pressure blocks of the pressure plate and the contact button. The contact button is electrically connected to the control host, and the control host is electrically connected to the warning light.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing structures such as a support portion, a middle connection portion and a fixture module, the support portion is used to support and install the middle connection portion on the machine tool mounting plate, and the middle connection portion is used to position the fixture modules on both sides. The positions of the fixture modules on both sides can also be replaced as needed, and the fixture modules can clamp the turbine blades in different clamping states, so that the right turbine blade has the back side facing up and the left turbine blade has the basin side facing up, and the clamping state of the fixture module can be converted according to the position of the sealing groove to be processed, 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 processed. The first clamping state is used for processing the sealing groove on the back side of the turbine blade, and the second clamping state is used for processing the sealing groove on the basin side of the turbine blade. After the left and right processing heads process the basin and back side sealing grooves 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, and then the positions of the left and right turbine blades are exchanged by rotating the middle connection portion. The processing head processes the sealing groove on the unprocessed side of the turbine blade, so that there is no need to replace the fixture, disassemble the turbine blade, or frequently replace the processing electrode, which ensures the processing efficiency and avoids the influence on the processing accuracy caused by disassembly. The sealing groove processing device can simultaneously process the sealing grooves on the blade basin side and the blade back side of the turbine working blades on both sides by installing the sealing groove processing electrodes on the blade basin side and the blade back side of the corresponding shapes, and then the turbine blades on both sides can be adjusted to the processing needs of the sealing groove to be processed on the other side by adjusting the adjustable fixture. After the position is exchanged, the sealing groove is processed on the unprocessed side of the turbine blade, thereby improving the processing efficiency and processing qualification rate of the sealing groove of the working blade, and solving the problem that the existing sealing groove processing device not only needs to change the direction of the guide blade when processing the sealing groove of the working blade, but also needs to replace the blade fixture and the processing electrode, and the fixture needs to be re-positioned after replacement, resulting in low processing efficiency, and frequent replacement is likely to cause large fluctuations in accuracy, affecting the processing qualification rate of the sealing groove; 2. In the present invention, by providing structures such as a clamping part and a monitoring module, the clamping part is used to clamp and fix the turbine blades, and the monitoring module can monitor the clamping of the clamping tooth part. The monitoring process is as follows: if the clamping part fails to firmly clamp the turbine blades, looseness and gaps will appear between the main clamp and the auxiliary clamp, and the gap spacing between the main clamp and the auxiliary clamp will cause the elastic pressure bag to have surplus to enter the 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 pressure bag through the air pipe and the folding tube. Due to the reduction of gas in the airbag, the airbag will shrink, so that the pressure plate can move downward to start contact The button sends a control signal to the control host by contacting the button so that the warning light alarms the staff, thereby preventing the fixed turbine blades from shaking during processing due to looseness of the clamping part or improper installation and fixation, which affects the processing accuracy. The sealing groove processing device can monitor the fixing condition of the turbine blades to be processed, thereby preventing the turbine blades from shaking during processing and affecting the processing accuracy. The problem that the existing sealing groove processing device generally uses bolts and nuts to tighten the working blades to be processed, and because it is manually operated, the degree of tightening may be insufficient when fixing the working blades, which may cause the turbine blades to shake during processing and affect the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure at A; Figure 3 It is a structural schematic diagram of the electrospark machining main body of the present invention; Figure 4 It is a structural schematic diagram of the machine tool mounting plate of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the machine tool installation plate removed from another perspective; Figure 6 It is a structural schematic diagram of the support part of the present invention; Figure 7 It is a structural schematic diagram of the connecting part in the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the structure viewed from above; Fig. 9 It is a schematic structural diagram of a first clamping state of a clamp module of the present invention; Fig.10 It is a structural schematic diagram of the outer shell of the present invention; Fig.11 It is a structural schematic diagram of the angle adjustment part of the present invention; Fig.12It is a cross-sectional structural schematic diagram of the angle adjustment part of the present invention; Fig.13 It is a schematic cross-sectional structure diagram of the seat portion and the clamping portion of the present invention; Fig.14 For the present invention Fig.13 Schematic diagram of the seat structure; Fig.15 For the present invention Fig.13 A schematic diagram of the structure of the clamping part; Fig.16 It is a schematic structural diagram of a second clamping state of the clamp module of the present invention; Fig.17 It is a schematic structural diagram of the turbine blade of the present invention, with the left blade basin side facing and the right blade back side facing; Fig.18 For the present invention Fig.16 Another perspective structural diagram of; Fig.19 It is a structural schematic diagram of the monitoring module of the present invention; Fig. 20 It is a structural schematic diagram of the detection part of the present invention.

[0014] In the figure: 1. EDM machine body; 11. Machine base; 12. Machine head; 13. Machine tool mounting plate; 14. Control main unit; 15. Warning light; 2. Support part; 21. Rail block; 22. Base column; 23. Loading plate; 24. Fixing ring; 25. Adjusting screw; 26. Tightening block; 27. Slot; 3. Middle joint; 31. Base shell; 32. Rail mouth; 33. Connecting plate; 34. Rail handle; 35. First spring; 36, rail groove; 37, connecting rod; 38, frame; 39, block; 4, fixture module; 41, shell; 411, outer frame; 412, notch; 413, rotating hole; 414, double-slot limit frame; 42, angle adjustment part; 421, rotating shaft; 422, rotating frame; 423, ring groove; 424, limit groove; 425, rail rod; 426, first tension spring; 427, positioning member; 428, Adjusting pull block; 43, seat; 431, swivel seat; 432, rail ring; 433, groove; 434, slide bar; 435, second tension spring; 436, clamping strip; 44, clamping part; 441, main clamping member; 442, screw rod; 443, auxiliary clamping member; 444, wire sleeve; 445, folding channel; 446, sinking groove; 5, turbine blade; 51, clamping part; 52, blade; 53, upper edge plate; 54, upper Sealing groove; 55, lower edge plate; 56, lower sealing groove; 6, electrode fixture; 7, basin side processing electrode; 8, back side processing electrode; 9, monitoring module; 91, detection part; 911, seat shell; 912, slot; 913, cushion block; 914, contact button; 915, air bag; 916, pressure plate; 917, frame; 918, second spring; 92, air supply pipe; 93, folding pipe; 94, elastic pressure bag. DETAILED DESCRIPTION

[0015] See also Figure 1-20 , the present invention provides a technical solution: A sealing groove processing device for a turbine working blade comprises a support part 2, a middle connection part 3, a fixture module 4, a turbine blade 5 and an electrospark machining body 1 for carrying the support part 2, the middle connection part 3, the fixture module 4 and the turbine blade 5. The electrospark machining body 1 comprises a machine base 11, a machining head 12 is installed on both sides of the upper part of the machine base 11, a machine tool mounting plate 13 is installed in the upper groove of the machine base 11, a control host 14 is installed on the right side of the machine base 11, and a warning light 15 is installed on the upper side of the control host 14. The support part 2 is installed at the machine tool mounting plate 13, and the support part 2 comprises a rail block 21 slidably connected to the T-track of the machine tool mounting plate 13, and a base column 22 located on the upper side of the machine tool mounting plate 13 is fixedly connected to the upper side of the rail block 21. The base column 22 The upper side of the support part 2 is fixedly connected with a bearing plate 23, the outer side of the base column 22 is fixedly connected with a fixing ring 24, the front and rear threaded holes of the fixing ring 24 are spirally connected with adjusting screws 25, the lower ends of the adjusting screws 25 are fixedly connected with 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 provided with card grooves 27, 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 that is rotatably connected to the bearing plate 23 and is arranged in a horizontal direction, the upper sides of the left and right grooves of the base shell 31 are provided with rail openings 32 that are longitudinally penetrated, the left and right grooves of the base shell 31 are slidably connected with connecting plates 33, the upper sides of the connecting plates 33 are fixedly connected with rail handles 34 located on the inner side of the rail opening 32, and the left and right grooves of the base shell 31 are provided with A set of two first springs 35 are installed, and rail grooves 36 are longitudinally penetrated on the left and right sides of the lower end surface of the base shell 31. The lower end surface of the connecting plate 33 is fixedly connected with a connecting rod 37 that is slidably connected to the rail groove 36 and has different lengths on the left and right. The lower end of the connecting rod 37 is fixedly connected with a frame 38 sleeved on the outside of the base column 22. A clamping block 39 is inserted into the inner side of the clamping groove 27. 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. The end of the connecting plate 33 away from the base shell 31 is installed with a clamp module 4 with different adjustment actions. A group of turbine blades 5 are clamped at the left and right clamp modules 4 in different directions. The output end of the processing head 12 is installed with an electrode clamp. 6, a basin-side processing electrode 7 is installed on the lower side of the left electrode fixture 6, and a back-side processing electrode 8 is installed on the lower side of the right electrode fixture 6. The fixture module 4 includes a shell part 41, an angle adjustment part 42, a seat part 43 and a clamping part 44. The shell part 41 includes an outer frame 411 fixedly connected to the connecting plate 33, a slot 412 is provided on the inner side of the outer frame 411 and 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 part 42 includes a rotating shaft 421 rotatably connected to the rotation hole 413, one end of the rotating shaft 421 is fixedly connected to a rotating frame 422 located on the inner side of the slot 412, and an annular groove 423 is provided on the inner side of the circular mouth of the rotating frame 422.The end surface of one side of the rotating frame 422 close to the middle connecting portion 3 is provided with limiting grooves 424 on both 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, an end of the rail rod 425 away from the rotating frame 422 is fixedly connected with a positioning piece 427 engaged with the double-slot limiting frame 414, an outer side of the positioning piece 427 is fixedly connected with an adjusting pull block 428, the seat portion 43 includes a rotating seat 431 rotatably connected to the circular opening of the rotating frame 422, a rail ring 432 rotatably connected to the annular groove 423 is fixedly connected to the outer side of the rotating seat 431, and a transversely arranged groove 433 is provided on the end surface of one side of the rotating seat 431 close to the middle connecting portion 3, and the inner side of the groove 433 is fixedly connected with the inner side of the groove 433. A slide bar 434 is slidably connected, a second tension spring 435 is fixedly connected between the inner wall of the groove 433 and the slide bar 434, one end of the slide bar 434 away from the second tension spring 435 is fixedly connected to a clamping strip 436 clamped in the inner side of the limit groove 424, the clamping portion 44 comprises a main clamping member 441, a side of the swivel seat 431 away from the clamping strip 436 is fixedly connected to the main clamping member 441, 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 are spirally connected to the screw sleeves 444 for tightening 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, and this arrangement makes the clamp module 4 The turbine blade 5 can be clamped in different clamping states, so that the right turbine blade 5 has the back side facing upward and the left turbine blade 5 has the basin side facing upward, and the clamping state of the fixture module 4 can be converted according to the position of the sealing groove to be processed, so as to adjust the position direction of the turbine blades 5 on both sides to adapt to the position angle required for the sealing groove to be processed; the turbine blade 5 includes 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 arranged on the inner side of the upper edge plate 53, and a lower edge plate 55 is fixedly connected to the other longitudinal side of the blade portion 52, a lower sealing groove 56 is opened on the inner side of the lower edge plate 55, the upper edge plate 53 of the left turbine blade 5 is arranged to face upward, and the basin side processing electrode 7 is connected to the upper sealing groove. 54 are all arranged vertically 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 arranged vertically, and is aligned up and down with the back processing electrode 8. This arrangement indicates the position of each sealing groove of the left and right turbine blades 5, so that the basin side processing electrode 7 and the back side processing electrode 8 can be processed into the corresponding upper sealing groove 54 and lower sealing groove 56 after vertically moving downward; the rail handle 34 is composed of rails and handles. This arrangement is convenient for the staff to control the displacement. The rail of the rail handle 34 is slidably connected with the rail mouth 32. This arrangement keeps the rail handle 34 stable during displacement. A frame mouth is opened on the inner side of the frame body 38, and the frame mouth length of the frame body 38 is 2.5 times the diameter of the base column 22.This arrangement leaves room for the frame 38 to move outside the base column 22; a vertical slot and an inclined slot are provided on the inner side of the double slot limit frame 414; the positioning member 427 is composed of a disc and an insert; the insert of the right positioning member 427 is inserted into the inclined slot of the double slot limit frame 414; the insert of the left positioning member 427 is inserted into the vertical slot of the double slot limit frame 414; this arrangement enables the positioning member 427 to be positioned in different slots of the double slot limit frame 414 to meet the needs of different clamping states; the slideway and the slot 433 of the rotating shaft 421 are both square track structures; the rail rod 425 and the slide rod 434 are both square rod structures; this arrangement enables the rail rod 425 to drive the rotating shaft 421 to rotate, and the slide rod 434 to drive the rotating seat 431 to rotate.

[0016] like Figure 2 , Fig.13 , Figure 19-20As shown, the inner side of the main clamp 441 is provided with a folding channel 445, and the side of the folding channel 445 close to the auxiliary clamp 443 is provided with a sink 446. The upper side of the middle connecting part 3 is installed with a monitoring module 9, and the monitoring module 9 includes a detection part 91, an air delivery pipe 92, a folding pipe 93 and an elastic pressure bag 94. The detection part 91 includes a seat shell 911 fixedly connected to the upper end surface of the base shell 31, and the front and rear sides of the seat shell 911 are provided with slots 912. The front and rear sides of the seat shell 911 are fixedly connected with a pad 913 located at the lower side of the slot 912, and the upper side of the pad 913 is A contact button 914 is installed, an air bag 915 is installed on the inner side of the seat shell 911, a group of slots 912 are slidably connected to the inner side of a pressure plate 916 arranged on the upper side of the air bag 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 air bag 915 are connected to the air supply pipe 92, the end of the air supply pipe 92 away from the air bag 915 is connected to the folding pipe 93, the folding pipe 93 passes through the rotating seat 431 and is fixedly connected to the folding channel 445, The end of the tube 93 away from the gas delivery pipe 92 is connected to an elastic pressure bag 94 located on the inner side of the sink 446. Through this arrangement, the clamping part 44 is used to clamp and fix the turbine blade 5, and the monitoring module 9 can monitor the clamping of the clamping part 44 to prevent the turbine blade 5 from shaking during processing and affecting the processing accuracy; 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. Through this arrangement, the pressure plate 916 can fix the gas The capsule 915 is fully pressed down, and the pressing blocks of the pressing plate 916 are all arranged on the upper side of the contact button 914. A gap is arranged between the pressing blocks of the pressing plate 916 and the contact button 914. Through this arrangement, when the clamping portion 44 is not loose, the normal contact button 914 will not contact the pressing plate 916. The contact button 914 and the control host 14 are electrically connected, and the control host 14 and the warning light 15 are electrically connected. Through this arrangement, the contact button 914 can send a control signal to the control host 14 to enable the warning light 15 to alarm the staff.

[0017] Workflow: The sealing groove processing device processes the sealing groove of the turbine working blade as follows. Note 1: The basin side processing electrode 7 has the same shape as the upper sealing groove 54 to be processed, and the back side processing electrode 8 has the same shape as the lower sealing groove 56 to be processed. Note 2: The electrical appliances in this scheme are all externally powered and controlled by the control host 14. Note 3: The middle connection part 3 exchanges the positions of the left and right clamp modules 4 and the turbine blades 5 as follows. Hold the rail handles 34 on each side with both hands, and displace a group of rail handles 34 toward each other, so that the connecting plates 33 on both sides are displaced toward each other. The displacement of a group of connecting plates 33 toward each other can drive the clamp modules 4 and turbine blades 5 on both sides to displace toward each other, so that the subsequent rotation is not interfered by the machine base 11. On the other hand, it can drive a group of connecting rods 37 and the frame 38 to displace toward each other, and the displacement of the frame 38 will drive the block 3 9 is disengaged from the card slot 27, so that the card block 39 and the card slot 27 no longer restrict the rotation of the center connection part 3. At this time, the center connection part 3 is rotated 180 degrees to exchange the positions of the left and right clamp modules 4 and the turbine blade 5. After the rotation is completed, the rail handle 34 is loosened, and the elastic force of the first spring 35 causes the connecting plate 33 to be displaced, so that the clamp module 4 and the turbine blade 5 are displaced and reset in the back direction, and the connecting rod 37 and the frame body 38 are displaced and reset in the back direction. The displacement of the frame body 38 will drive the card block 39 to be stuck in the card slot 27, completing the positioning of the center connection part 3, and also completing the position exchange of the left and right clamp modules 4 and the turbine blade 5. Note 4: The right processing head 12 and the back processing electrode 8 only process the lower sealing groove 56 on the back side of the turbine blade 5, and the left processing head 12 and the basin side processing electrode 7 only process the upper sealing groove 54 on the basin side of the turbine blade 5;First, the support part 2 is used to support and install the middle connecting part 3 on the machine tool mounting plate 13, and the middle connecting part 3 is used to position the clamp modules 4 on both sides. The positions of the clamp modules 4 on both sides can also be replaced as needed, and the clamp modules 4 can clamp the turbine blades 5 in different clamping states, so that the right turbine blade 5 is with the back side facing up, and the left turbine blade 5 is with the basin side facing up, and the clamping state of the clamp module 4 can be converted according to the position of the sealing groove to be processed, so as to adjust the position direction of the turbine blades 5 on both sides to adapt to the position angle required for the sealing groove to be processed. The actual operation is as follows: First, the turbine blades 5 on both sides are installed. First, the thread sleeve 444 of the clamping part 44 is loosened so that the main clamp 441 and the auxiliary clamp 443 can be loosened and separated. At this time, the turbine blade 5 is placed between the clamping teeth of the main clamp 441 and the auxiliary clamp 443, and the clamping part 51 of the turbine blade 5 is aligned with the main clamp 4 41. After the front and rear end surfaces of the auxiliary clamp 443 are aligned, the tightening thread sleeve 444 is used to tighten the main clamp 441 and the auxiliary clamp 443, so that the main clamp 441 and the auxiliary clamp 443 clamp the turbine blade 5, thereby completing the installation and fixation of the turbine blades 5 on both sides, and then the position angle of the turbine blade 5 needs to be adjusted according to the position of the sealing groove to be processed by the turbine blade 5. The back processing electrode 8 installed on the right processing head 12 is used to process 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 clamp module 4. Because the lower sealing groove 56 to be processed is an inclined angle rather than a vertical angle, in order to allow the back processing electrode 8 to perform vertical processing, it is also necessary to tilt the right turbine blade 5 at an angle so that the back processing electrode 8 can move downward through the right processing head 12 to process the lower sealing groove 56 (such as; Fig. 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, the influence of disassembly on the processing accuracy can be avoided, so that the sealing groove processing device can simultaneously process the sealing grooves on the blade basin side and the blade back side of the turbine working blades on both sides by installing the sealing groove processing electrodes of the corresponding shapes on the blade basin side and the blade back side, and then the turbine blades 5 on both sides can be adjusted to the processing needs of the sealing groove to be processed on the other side by adjusting the adjustable clamp, and the sealing groove is processed on the unprocessed side of the turbine blade 5 after the position is replaced, thereby improving the processing efficiency and processing qualification rate of the sealing groove of the working blade; it should be noted that the clamping part 44 is used to clamp and fix the turbine blade 5, and the monitoring module 9 can monitor the clamping of the clamping part 44, and the monitoring process is as follows: if the clamping part 44 does not firmly clamp the turbine blade 5, looseness and gaps will appear between the main clamp 441 and the auxiliary clamp 443, and the main clamp 441 The gap between the auxiliary clamp 443 will cause the elastic pressure bag 94 to have a surplus of external gas entering. 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 air bag 915, so that the gas in the air bag 915 enters the elastic pressure bag 94 through the gas pipe 92 and the folding tube 93. Due to the reduction of gas in the air bag 915, the air bag 915 will shrink, so that the pressure plate 916 can move downward to start the contact button 914, and the control signal is sent to the control host 14 through the contact button 914 to make the warning light 15 alarm the staff, so as to avoid the looseness of the clamping part 44 or the improper installation and fixation, which will cause the fixed turbine blade 5 to shake during processing and affect the processing accuracy, so that the sealing groove processing device can monitor the fixing condition of the turbine blade 5 to be processed, so as to avoid the shaking of the turbine blade 5 during processing and affect the processing accuracy.

[0018] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should 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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