Positioning device for processing double integral cast guide vane seal groove

Abstract

The utility model relates to electrode processing technical field especially is a kind of positioning device of processing duplex integral cast guiding vane sealing groove, including seat portion, clamping portion, tight column component, duplex vane, electrode holder, detection module and air extraction valve pipe, the seat portion includes base, the front left side groove position of base is fixedly connected with wedge face support seat one, the front right side groove position of base is fixedly connected with wedge face support seat two, the upside of wedge face support seat one and wedge face support seat two is provided with duplex vane, the inside of wedge face support seat one and wedge face support seat two is all set with the air inlet channel of front opening, the upside of air inlet channel is all set with a pair of detection hole, in the utility model, through the structure such as the detection module, air extraction valve pipe, wedge face support seat one and wedge face support seat two being arranged make positioning device after being fixed positioning to duplex integral cast guiding vane, whether fixed in place, whether there is deflection, carry out quick detection.

Description

Technical Field

[0001] This utility model relates to the field of electrode processing technology, specifically a positioning device for processing sealing grooves of double integral cast guide vanes. Background Technology

[0002] Turbine guide vanes are one of the key aerodynamic components of aero engines and an important critical part of the entire engine. They have a large number of parts and require extremely high precision in machining dimensions. In recent years, in order to improve the overall performance of the engine, reduce airflow loss, and improve structural strength, designers have added a double integral casting structure to the turbine guide vanes. This is the double integral casting guide vane. When the guide vane is working, it is surrounded by high-temperature gas flow. In order to reduce the leakage loss of the aero engine and improve the sealing effect, sealing grooves need to be machined on the guide vane. This requires positioning the guide vane before electrode machining.

[0003] During the machining of double integral cast guide vanes, their irregular shape makes alignment and stable fixation difficult. After fixation, workers need to use feeler gauges and other tools to check whether the contact parts of the positioning points are completely fitted to determine whether there is any deviation and whether the fixation is in place. However, this inspection operation is inconvenient and inefficient. Therefore, a positioning device for machining the sealing groove of double integral cast guide vanes is proposed to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning device for machining the sealing groove of a double integral cast guide blade, so as to solve the problem that after fixing the double integral cast guide blade, the existing positioning device requires the use of feeler gauges, measuring rulers and other tools to check whether the blade is deviated or in place, which leads to inconvenience and low efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A positioning device for machining sealing grooves of double integrally cast guide vanes includes a base, a clamping part, a clamping column, double vanes, an electrode holder, a detection module, and an air extraction valve pipe. The base includes a base plate, a wedge support seat one is fixedly connected to the front left groove of the base plate, and a wedge support seat two is fixedly connected to the front right groove of the base plate. Double vanes are arranged on the upper side of the wedge support seat one and the wedge support seat two. Air inlets with front openings are opened on the inner side of both the wedge support seat one and the wedge support seat two. Each of the air inlets has a pair of detection channels on its upper side. A detection module is installed on the upper side of the base. The detection module includes a shell, an exhaust valve pipe, a suction mechanism, a spring, and a locking mechanism. The shell includes a housing fixed to the upper side of the base. An interface is provided on the front side of the housing, a guide opening is provided on the rear side of the housing, a rail opening is provided on the left side of the housing, an exhaust hole is provided on the upper side of the housing, an exhaust valve pipe is connected to the inner side of the exhaust hole, and a suction mechanism is installed on the inner side of the housing.

[0007] Preferably, the air extraction mechanism includes a control rod slidably connected to the guide port, a back plate fixedly connected to the front end of the control rod and located inside the housing, a slot being provided on the outer curved surface of the back plate, a piston fixedly connected to the front side of the back plate, a spring being installed on the front side of the piston and located inside the housing, and a locking mechanism being installed at the rail opening.

[0008] Preferably, the locking mechanism includes a base strip fixed inside the rail opening, a locking plate that is slidably connected to the rail opening is sleeved on the outer side of the base strip, and the right end of the locking plate is inserted into the inner side of the slot. A pair of springs are fixedly connected between the right end face of the base strip and the right inner wall of the inner hole of the locking plate. A pull block is fixedly connected to the left side of the locking plate. An air extraction valve pipe is connected to the front side of the interface, and the right rear end of the air extraction valve pipe is connected to the air inlet.

[0009] Preferably, the suction valve pipe consists of a diverter pipe, a plug, and a one-way valve. The plug of the suction valve pipe is inserted into the inside of the air inlet channel. The one-way valve of the suction valve pipe allows flow from back to front. The exhaust valve pipe consists of a pipe body and a one-way valve. The one-way valve of the exhaust valve pipe allows flow from bottom to top.

[0010] Preferably, the lower end face of the double blade is in close contact with the upper end face of the first wedge support and the second wedge support, the upper end face angles of the first wedge support and the second wedge support are different, the detection channels are all set on the lower side of the double blade, the outer diameter of the piston is the same as the inner diameter of the shell, and the outer curved surface of the piston is in contact with the inner curved surface of the shell.

[0011] Preferably, a positioning column one is fixedly connected to the rear left side slot of the base. A pair of mounting notches are opened on the left side of the positioning column one. An arc-shaped positioning block is fixedly connected to the front side of each pair of mounting notches on the positioning column one. A positioning column two is fixedly connected to the right rear side slot of the base. An exhaust side positioning block is fixedly connected to the front side of each pair of mounting notches on the positioning column two. A pair of threaded mounting holes arranged vertically are opened on the front side of the positioning column two. A clamping column is detachably connected to the inner side of each threaded mounting hole by bolts. The rear end face of the front corner block of the clamping column is tightly fitted with the front end face of the right edge of the double blade. A reference hole is opened on the upper side of the positioning column two. A clamping part is installed on the inner side of each mounting notch.

[0012] Preferably, the clamping part includes a seat bar fixedly connected to the inner wall of the mounting slot. The front end of the seat bar is detachably connected to a seat block by bolts. The inner side of the seat block has a threaded hole with a front opening. The rear side of the threaded hole has a guide groove. A connecting rod is installed inside the threaded hole. The outer side of the connecting rod has a mating thread that connects with the threaded hole. The front end of the connecting rod is fixedly connected to a rotating block. The rear end of the connecting rod is fitted with a clamping block that slides with the guide groove.

[0013] Preferably, the rear end faces of the double blades are all in contact with the inner wall of the corner groove of the arc positioning block and the front end face of the exhaust side positioning block, the rear end faces of the pressing blocks are all in close contact with the front end face of the left side of the double blades, an electrode holder is installed on the upper side of the double blades, and the width dimensions of the upper and lower seat blocks are different.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, the detection module, the air extraction valve pipe, the wedge support seat one and the wedge support seat two are designed to ensure that the wedge support seat one and the wedge support seat two are fully engaged with the double blades. This can serve as a reference for whether the double blades are fixed in place and whether they are skewed. The detection module, in conjunction with the air extraction valve pipe, can quickly detect whether the wedge support seat one and the wedge support seat two are fully engaged with the double blades. This allows for the determination of whether the double blades are fixed in place and whether they are skewed. After the positioning device has fixed and positioned the double integral cast guide blades, it can quickly detect whether the fixing is in place and whether there is any skew. This solves the problem that existing positioning devices require the use of feeler gauges, rulers and other tools to check whether the blades are skewed and in place after fixing the double integral cast guide blades, which leads to inconvenience and low efficiency.

[0016] 2. In this utility model, the clamping part, the pressing column, the arc positioning block and the exhaust side positioning block, the wedge support seat one and the wedge support seat two are provided to support the double blades. After the double blades are moved backward, the arc positioning block and the exhaust side positioning block can initially position the double blades, while the clamping part and the pressing column can fix and lock the double blades after initial positioning. This can fix and position the double blades, avoid the double blades from moving during the subsequent sealing groove processing, and provide a more reliable guarantee for subsequent processing operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Another structural diagram from another perspective;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the base of this utility model;

[0020] Figure 4 This is a cross-sectional structural schematic diagram of the wedge-shaped support of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the clamping part of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the clamping column of this utility model;

[0023] Figure 7 This is a schematic diagram of the cooperation structure between the detection module and the extraction valve tube of this utility model;

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of the detection module of this utility model;

[0025] Figure 9 This is a schematic diagram of the air extraction mechanism of this utility model;

[0026] Figure 10 This is a schematic diagram of the locking mechanism of this utility model;

[0027] Figure 11 This is a schematic diagram showing the disassembled structure of the double blades and electrode holder of this utility model.

[0028] In the diagram: 1. Seat; 101. Base; 102. Wedge support seat one; 103. Wedge support seat two; 104. Air inlet; 105. Inspection channel; 106. Positioning column one; 107. Mounting notch; 108. Arc positioning block; 109. Positioning column two; 110. Exhaust side positioning block; 111. Threaded mounting hole; 112. Reference hole; 2. Clamping part; 21. Seat bar; 22. Seat block; 23. Threaded hole; 24. Guide groove; 25. Connecting rod; 26. Mating thread; 27. Rotating block; 28. 1. Clamping block; 3. Clamping column; 4. Double blade; 5. Electrode holder; 6. Detection module; 61. Shell; 611. Housing; 612. Interface; 613. Guide port; 614. Rail opening; 615. Exhaust hole; 62. Exhaust valve pipe; 63. Air extraction mechanism; 631. Control rod; 632. Back plate; 633. Slot; 634. Piston; 64. Spring 1; 65. Locking mechanism; 651. Base bar; 652. Locking plate; 653. Spring 2; 654. Pull block; 7. Air extraction valve pipe. Detailed Implementation

[0029] Please see Figure 1-11 This utility model provides a technical solution:

[0030] A positioning device for machining sealing grooves of double integral cast guide vanes includes a base 1, a clamping part 2, a clamping column 3, double vanes 4, an electrode holder 5, a detection module 6, and an air extraction valve pipe 7. The base 1 includes a base 101. A wedge support seat 102 is fixedly connected to the front left slot of the base 101, and a wedge support seat 203 is fixedly connected to the front right slot of the base 101. Double vanes 4 are arranged on the upper side of the wedge support seat 102 and the wedge support seat 203. Air inlets 104 with front openings are opened on the inner side of both the wedge support seat 102 and the wedge support seat 203. A pair of detection channels 105 are opened on the upper side of each air inlet 104. The upper side of the base 101 is equipped with a... The system includes a detection module 6, comprising a housing 61, an exhaust valve pipe 62, a suction mechanism 63, a spring 64, and a locking mechanism 65. The housing 61 consists of a housing 611 fixed to the upper side of the base 101. The housing 611 has an interface 612 on its front side, a guide port 613 on its rear side, a rail opening 614 on its left side, and an exhaust hole 615 on its upper side. The exhaust valve pipe 62 is connected to the inner side of the exhaust hole 615. The suction mechanism 63 is installed inside the housing 611. The suction mechanism 63 includes a control rod 631 slidably connected to the guide port 613. A back plate 631 located inside the housing 611 is fixedly connected to the front end of the control rod 631. 32. A slot 633 is provided on the outer curved surface of the back plate 632. A piston 634 is fixedly connected to the front side of the back plate 632. A spring 64 is installed on the front side of the piston 634 inside the housing 611. This arrangement allows the spring 64 to elastically unfold, pushing the suction mechanism 63 backward to perform suction. A locking mechanism 65 is installed at the rail opening 614. The locking mechanism 65 includes a base strip 651 fixed inside the rail opening 614. A locking plate 652 is slidably connected to the rail opening 614 on the outer side of the base strip 651. The right end of the locking plate 652 is inserted into the slot 633. A pair of springs 653 are fixedly connected between the right end face of the base strip 651 and the right inner wall of the inner hole of the locking plate 652. A pull block 654 is fixedly connected to the left side of the locking plate 652. This setting allows the locking mechanism 65 to position the suction mechanism 63, keeping the suction mechanism 63 in its normal position. The front side of the interface 612 is connected to the suction valve pipe 7, and the right rear end of the suction valve pipe 7 is connected to the air inlet 104. The suction valve pipe 7 consists of a diverter pipe, a plug, and a one-way valve. The plug of the suction valve pipe 7 is inserted into the inside of the air inlet 104. The one-way valve of the suction valve pipe 7 allows flow from back to front. The exhaust valve pipe 62 consists of a pipe body and a one-way valve. The one-way valve of the exhaust valve pipe 62 allows flow from bottom to top. This setting allows the exhaust valve pipe 62 to cooperate with the detection module 6 to perform one-way suction of the air inlet 104.The lower end face of the double blade 4 is tightly fitted with the upper end face of the first wedge support 102 and the second wedge support 103. The upper end faces of the first wedge support 102 and the second wedge support 103 have different angles. The detection channels 105 are all located on the lower side of the double blade 4. This setting can be used as a reference to determine whether the double blade 4 is installed and fixed in place. The outer diameter of the piston 634 is the same as the inner diameter of the housing 611. The outer curved surface of the piston 634 is fitted with the inner curved surface of the housing 611. This setting allows the piston 634 to move backward to perform air extraction.

[0031] like Figures 1-3 , Figures 5-6 , Figure 11 As shown, a positioning column 106 is fixedly connected to the rear left groove of the base 101. A pair of mounting notches 107 are provided on the left side of the positioning column 106. Arc-shaped positioning blocks 108 are fixedly connected to the front side of each pair of mounting notches on the positioning column 106. A positioning column 209 is fixedly connected to the right rear groove of the base 101. A venting side positioning block 110 is fixedly connected to the front side of each pair of mounting notches on the positioning column 209. A pair of threaded mounting holes 111 arranged vertically are provided on the front side of the positioning column 209. The inner side of each threaded mounting hole 111 is removable by bolts. A clamping column 3 is connected, and the rear end face of the front corner block of the clamping column 3 is tightly fitted with the front end face of the right edge of the double blade 4. A reference hole 112 is opened on the upper side of the positioning column 2 109, and a clamping part 2 is installed on the inner side of the mounting notch 107. The clamping part 2 includes a seat bar 21 fixedly connected to the inner wall of the mounting notch 107. The front end of the seat bar 21 is detachably connected to a seat block 22 by bolts. A threaded hole 23 with a front opening is opened on the inner side of the seat block 22. A guide groove 24 is opened on the rear side of the threaded hole 23. A connecting rod 25 is installed on the inner side of the threaded hole 23. The outer side is provided with a mating thread 26 that connects to the threaded hole 23. The front end of the connecting rod 25 is fixedly connected to a rotating block 27, and the rear end of the connecting rod 25 is fitted with a clamping block 28 that slides with the guide groove 24. The rear end faces of the double blades 4 are all in contact with the inner wall of the corner groove of the arc positioning block 108 and the front end face of the exhaust side positioning block 110. The rear end faces of the clamping blocks 28 are all in close contact with the front end face of the left side of the double blades 4. This arrangement allows the wedge support 102 and the wedge support 203 to support the double blades 4. After the double blades 4 are moved backward, the arc positioning block 28 is in close contact with the front end face of the left side of the double blades 4. Block 108 and exhaust-side positioning block 110 can perform preliminary positioning of the double blade 4, while clamping part 2 and pressing column 3 can fix and lock the double blade 4 after preliminary positioning. This can fix and position the double blade 4, preventing the double blade 4 from moving during subsequent sealing groove processing, and providing a more reliable guarantee for subsequent processing operations. An electrode holder 5 is installed on the upper side of the double blade 4. With this setting, the double blade 4 can be processed for sealing grooves. The upper and lower seat blocks 22 have different widths, which is used to adapt to the shape of the double blade 4.

[0032] Workflow: The fixing and positioning operation of the double integral cast guide vane is as follows: Note 1: The arc-shaped positioning block 108 and the exhaust-side positioning block 110 are both fixed in the square grooves of positioning column 106 and positioning column 2 109 by welding; Note 2: The length of the arc-shaped positioning block 108 should be set so that the inner wall of its corner groove can fit against the rear end face of the double vane 4, and the length of the exhaust-side positioning block 110 should be set so that its front end face can fit against the rear end face of the double vane 4; First, clamp each part... The seat block 22 and its auxiliary mechanisms are removed from the seat bar 21. Next, the clamping column 3 is installed in the threaded mounting hole 111 with bolts, but the bolts are not tightened yet to ensure that the clamping column 3 can rotate freely. At this time, the pressure corner block of the clamping column 3 should be set downward. The above operations avoid interference with the subsequent placement and installation of the double blade 4. Then, the double blade 4 is placed on the upper side of the wedge support 102 and the wedge support 203, and the double blade 4 is pushed backward so that its rear end face is aligned with the arc. The inner wall of the corner groove of the positioning block 108 and the front end face of the exhaust-side positioning block 110 are tightly fitted together to complete the placement and initial positioning of the double blade 4. Then, by rotating the clamping column 3, the rear end face of its clamping block is made to fit against the right side of the front end face of the double blade 4. Then, the bolts are tightened to secure the clamping column 3, thus fixing the right side of the double blade 4. Next, the seat blocks 22 of each clamping part 2 and the auxiliary mechanism are reset and installed using bolts, so that the seat blocks 22 and the auxiliary mechanism are positioned within the double blade. 4. At this time, the rotating block 27, connecting rod 25, and mating thread 26 of each clamping part 2 can be rotated by rotating. Since the mating thread 26 is threadedly connected to the thread hole 23, the rotation of the connecting rod 25 is displaced backward, which in turn pushes the clamping block 28 to displace backward and fit tightly against the front end face of the left edge of the double blade 4. Through the above operation, the double blade 4 can be fixed and positioned to avoid the double blade 4 from changing during the subsequent sealing groove processing, and to provide a more reliable guarantee for the subsequent processing operation.It should be noted that the upper end faces of wedge support 102 and wedge support 203 have different angles. When the double blade 4 is fixed in place without deviation, its lower end face will be tightly fitted with the upper end faces of wedge support 102 and wedge support 203 without angular deviation. This is used as the testing benchmark. If there is deviation or the fixing is not in place, gaps will appear. The testing operation process is as follows: The operator first pulls the pull block 654, which moves the locking plate 652 to the left, so that the right end of the locking plate 652 is disengaged from the slot 633 of the back plate 632. At this time, the back plate 632, piston 634 and control rod 631, which are no longer locked by the locking plate 652, will receive a backward thrust under the elastic action of spring 164. Under the action of the thrust, the piston 634 cooperates with the air extraction valve pipe 7 to push the wedge support 102. The air intake duct 104 and detection port 105 of the wedge support 103 are used for evacuation. If the piston 634 does not move backward under the thrust of the spring 64, it means that the piston 634 cannot evacuate. This indicates that there is no gap between the double blade 4 and the wedge support 102 and the wedge support 103, and the installation of the double blade 4 is not misaligned. This further indicates that the double blade 4 is fixed in place without deviation. Conversely, if the piston 634, the back plate 632, and the control rod 631 move backward under the thrust of the spring 64, it means that the piston 634 can evacuate the air intake duct 104 and detection port 105 of the wedge support 102 and the wedge support 103 through the evacuation valve pipe 7. This indicates that the double blade 4 is not properly positioned with the wedge support 102 and the wedge support 103. If there is a gap or misalignment between the support 2 103, it indicates that the double blade 4 is not properly fixed and has deviated. At this time, the operator needs to readjust the fixed positioning of the double blade 4, check whether the fit between the double blade 4 and the arc positioning block 108 and the exhaust side positioning block 110 is in place, observe whether the clamping part 2 and the pressing column 3 are pressing the double blade 4 in place, and check whether there are impurities on the upper surface of the wedge support 1 102 and the wedge support 2 103. After readjusting the positioning and ensuring that it is correct, push the back plate 632 and the piston 634 to reset and move forward by the control rod 631. When the piston 634 moves forward, the gas in front of the piston 634 will be discharged through the exhaust port 615 and the exhaust valve pipe 62. When step 34 is in place, it will press the locking plate 652, causing the locking plate 652 to move to the left. Then, when the locking plate 652 is aligned with the slot 633, the locking plate 652 will be reset to the right under the elastic force of the second spring 653 and re-inserted into the slot 633, so that the detection module 6 returns to the initial state. At this time, the operator can repeat the above detection action to quickly detect whether the fixed positioning of the double-section blade 4 is in place. This realizes that after the positioning device fixes and positions the double-section integral cast guide blade, it can quickly detect whether the fixation is in place and whether there is any deviation. This solves the problem that the existing positioning device needs to use feeler gauges, measuring rulers and other tools to check whether the blade is deviated or in place after fixing the double-section integral cast guide blade, which leads to inconvenience and low efficiency.The general operation for machining the sealing groove of the double blade 4 is as follows: The positioning device is placed on the magnetic platform inside the EDM machine. After calibrating the positioning device using a lever dial indicator, the magnetic platform switch is turned on to fix the positioning device. An EDM centering ball is used to perform coordinate system transformation between the positioning device and the forming machine. The electrode holder 5 is installed on the electrode chuck of the EDM machine and holds the electrode. Since the electrode holder 5 has a positional relationship with the reference hole 112 on the upper surface of the positioning column 109 during design and manufacturing, this positional relationship is converted to the machining head of the equipment and written into the program before machining. The electrode machining of the sealing groove of the double blade 4 is achieved by avoiding the feed path in the program. After the dimensions and position of the machined sealing groove are inspected and found to be qualified, the double blade 4 is removed from the positioning device.

[0033] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A positioning device for machining the sealing groove of a double integral cast guide vane, comprising a base (1), a clamping part (2), a clamping column (3), a double vane (4), an electrode holder (5), a detection module (6), and an air extraction valve pipe (7), characterized in that: The base (1) includes a base (101). A wedge support seat one (102) is fixedly connected to the front left slot of the base (101), and a wedge support seat two (103) is fixedly connected to the front right slot of the base (101). Double blades (4) are provided on the upper side of the wedge support seat one (102) and the wedge support seat two (103). An air inlet channel (104) with a front opening is opened on the inner side of the wedge support seat one (102) and the wedge support seat two (103). A pair of detection channels (105) are opened on the upper side of the air inlet channel (104). A detection module (6) is installed on the upper side of the base (101). Block (6) includes a shell (61), an exhaust valve pipe (62), an air extraction mechanism (63), a spring (64), and a locking mechanism (65). The shell (61) includes a housing (611) fixed to the upper side of the base (101). The front side of the housing (611) has an interface (612), the rear side of the housing (611) has a guide (613), the left side of the housing (611) has a rail opening (614), the upper side of the housing (611) has an exhaust hole (615), the inner side of the exhaust hole (615) is connected to the exhaust valve pipe (62), and the inner side of the housing (611) is equipped with an air extraction mechanism (63).

2. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 1, characterized in that: The air extraction mechanism (63) includes a control rod (631) slidably connected to the guide port (613). The front end of the control rod (631) is fixedly connected to a back plate (632) located inside the housing (611). A slot (633) is provided on the outer curved surface of the back plate (632). A piston (634) is fixedly connected to the front side of the back plate (632). A spring (64) located inside the housing (611) is installed on the front side of the piston (634). A locking mechanism (65) is installed at the rail opening (614).

3. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 2, characterized in that: The locking mechanism (65) includes a base strip (651) fixed inside the rail opening (614). A locking plate (652) that is slidably connected to the rail opening (614) is sleeved on the outside of the base strip (651). The right end of the locking plate (652) is inserted into the inside of the slot (633). A pair of springs (653) are fixedly connected between the right end face of the base strip (651) and the right inner wall of the inner hole of the locking plate (652). A pull block (654) is fixedly connected to the left side of the locking plate (652). The front side of the interface (612) is connected to an air extraction valve pipe (7), and the right rear end of the air extraction valve pipe (7) is connected to the air inlet channel (104).

4. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 3, characterized in that: The suction valve pipe (7) consists of a split pipe, a plug and a one-way valve. The plug of the suction valve pipe (7) is inserted into the inside of the air inlet (104). The one-way valve of the suction valve pipe (7) allows flow from back to front. The exhaust valve pipe (62) consists of a pipe body and a one-way valve. The one-way valve of the exhaust valve pipe (62) allows flow from bottom to top.

5. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 3, characterized in that: The lower end face of the double blade (4) is closely fitted with the upper end face of the first wedge support (102) and the second wedge support (103). The upper end face angles of the first wedge support (102) and the second wedge support (103) are different. The detection channel (105) is set on the lower side of the double blade (4). The outer diameter of the piston (634) is the same as the inner diameter of the shell (611). The outer curved surface of the piston (634) is fitted with the inner curved surface of the shell (611).

6. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 3, characterized in that: A positioning column one (106) is fixedly connected to the rear left groove of the base (101). A pair of mounting notches (107) are provided on the left side of the positioning column one (106). An arc-shaped positioning block (108) is fixedly connected to the front side of each pair of mounting notches on the positioning column one (106). A positioning column two (109) is fixedly connected to the right rear groove of the base (101). An exhaust-side positioning block (108) is fixedly connected to the front side of each pair of mounting notches on the positioning column two (109). 10) A pair of threaded mounting holes (111) arranged vertically are provided on the front side of the positioning column 2 (109). The inner side of each threaded mounting hole (111) is detachably connected to a clamping column (3) by bolts. The rear end face of the front corner block of the clamping column (3) is tightly fitted with the front end face of the right edge of the double blade (4). A reference hole (112) is provided on the upper side of the positioning column 2 (109). A clamping part (2) is installed on the inner side of each mounting notch (107).

7. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 6, characterized in that: The clamping part (2) includes a seat bar (21) fixedly connected to the inner wall of the mounting slot (107). The front end of the seat bar (21) is detachably connected to a seat block (22) by bolts. The inner side of the seat block (22) is provided with a threaded hole (23) with a front opening. The rear side of the threaded hole (23) is provided with a guide groove (24). The inner side of the threaded hole (23) is installed with a connecting rod (25). The outer side of the connecting rod (25) is provided with a mating thread (26) that is threadedly connected to the threaded hole (23). The front end of the connecting rod (25) is fixedly connected with a rotating block (27). The rear end of the connecting rod (25) is fitted with a pressing block (28) that is slidably connected to the guide groove (24).

8. The positioning device for machining the sealing groove of a double-unit integral cast guide vane according to claim 7, characterized in that: The rear end face of the double blade (4) is in contact with the inner wall of the corner groove of the arc positioning block (108) and the front end face of the exhaust side positioning block (110). The rear end face of the pressing block (28) is in close contact with the front end face of the left side of the double blade (4). An electrode holder (5) is installed on the upper side of the double blade (4). The width dimensions of the upper and lower seat blocks (22) are different.

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