Clamp for machining space group holes in turbine guider blade

Abstract

In order to solve the problem that when a cooling hole is machined in an outer edge plate of a turbine guider blade through an electric discharge machine tool, an electrode wire is prone to drifting, and therefore the requirements for positioning, orientation, hole distance and the like of a blade hole site cannot be met, the utility model provides a clamp for machining a space group hole in the turbine guider blade. The fixture adopts a structural design from top to bottom and comprises an upper frame assembly and a lower frame assembly, the upper frame assembly is used for clamping the upper end of an electrode wire and moves relative to the lower frame assembly along with the moving end of the electric spark machine tool, the lower frame assembly is fixed to a workbench of the electric spark machine tool, and a blade mounting plate is arranged in the lower frame assembly. The blade mounting plate is matched with a clamping mechanism to reliably position and clamp a machined blade, the axis of a to-be-machined group hole in the blade is arranged at the vertical position, and it can be guaranteed that an electrode wire is perpendicular to a workbench of an electric spark machine tool. And moreover, a polytetrafluoroethylene guide sleeve is further mounted in a wire hole, through which the electrode wire penetrates, in the blade mounting plate, so that the electrode wire can be further prevented from drifting, and the stability of the machining process is ensured.

Description

Technical Field

[0001] The utility model relates to a clamp for machining space group holes on turbine guide vanes. Background Art

[0002] In aircraft engines, turbine guide vanes are always in a high-temperature working environment, so it is necessary to process a group of cooling holes on the outer edge plate of the turbine guide vanes, called air film holes. Their function is to form a cooling air film on the surface of the outer edge plate when high-pressure cooling air passes through the inner side of the outer edge plate, isolating the high-temperature combustion gas, thereby improving the working environment of the turbine guide vanes. For example, Figure 1 As shown, this group of cooling holes 21 has a total of 9 small holes (generally with a diameter of 0.5), and the axis lines of each cooling hole are parallel to each other. According to conventional processes, these cooling holes should be processed on an EDM machine, but are at a spatial angle in the design coordinate system of the product; since the direction of the electrode wire of the EDM machine is perpendicular to the machine table, when the cooling hole is in a vertical state, there is a large angle between the electrode wire and the edge plate surface of the turbine guide vane, which makes the electrode wire easy to drift during operation and cannot meet the requirements of blade hole positioning, orientation and hole spacing. Utility Model Content

[0003] In order to solve the technical problem that when machining cooling holes on the outer edge plate of a turbine guide vane using an electric spark machine, the electrode wire easily drifts and cannot meet the requirements of blade hole positioning, orientation and hole spacing, the utility model proposes a fixture for machining spatial group holes on a turbine guide vane.

[0004] The technical solution adopted by the utility model is:

[0005] A fixture for machining a space group hole on a turbine guide vane is special in that it comprises an upper frame assembly and a lower frame assembly arranged up and down; the upper frame assembly is connected to a moving end of an electric discharge machine tool and can perform pulsed up and down movement relative to the lower frame assembly; the lower frame assembly is fixedly mounted on a workbench of the electric discharge machine tool; during machining, the turbine guide vane is fixed by the lower frame assembly, the upper end of an electrode wire is fixed by the upper frame assembly, and the lower end of the electrode wire falls on the surface of a to-be-machined area of ​​the turbine guide vane and contacts the surface;

[0006] The upper frame assembly includes a height-adjustable frame structure consisting of an upper crossbeam at the clamping end, a wire guide plate and two screws, an electrode wire clamping mechanism arranged in the middle of the upper crossbeam at the clamping end, and a clamping handle arranged on the upper end surface of the upper crossbeam at the clamping end for connecting with the moving end of the electric discharge machine; the wire guide plate includes a first flat plate and a first inclined plate, and the first flat plate and the first inclined plate are both provided with a first wire hole for each electrode wire to pass through, and the inclination angle of the first inclined plate and the position of the first wire hole can ensure that the electrode wire passes through the first wire hole vertically;

[0007] The lower frame assembly includes a frame structure composed of a bottom plate, a column and a blade mounting plate, and a clamping mechanism arranged on the side wall of the blade mounting plate for clamping the turbine guide vane to be processed; the blade mounting plate includes a second flat plate and a second inclined plate, the second flat plate is located below the first flat plate of the wire guide plate and is parallel to it, and the second inclined plate is located below the first inclined plate of the wire guide plate and is parallel to it; the second inclined plate is provided with a second wire hole for each electrode wire to pass through, the inclination angle of the second inclined plate and the second wire hole are matched with the first inclined plate and the first wire hole to ensure that the electrode wire passes through the second wire hole vertically; the end of the second inclined plate has a boss matching the groove on the outer edge of the turbine guide vane, before processing, the boss is inserted into the groove, and the clamping mechanism is used to press the back of the turbine guide vane, so that the turbine guide vane can be clamped and fixed on the blade mounting plate;

[0008] When the upper frame assembly moves relative to the lower frame assembly, it is guided by a guide mechanism; the guide mechanism includes a cylindrical guide column and a chamfered guide column fixedly connected to the upper frame assembly, and a guide sleeve installed on the upper part of the lower frame assembly and respectively cooperating with the cylindrical guide column and the chamfered guide column; the upper frame assembly is guided by the cooperation between the cylindrical guide column and the guide sleeve, and between the chamfered guide column and the guide sleeve;

[0009] Insulating bushings are installed between the guide sleeve and the cylindrical guide post, and between the guide sleeve and the chamfered guide post, so as to insulate the two electrodes located on the upper frame assembly and the lower frame assembly.

[0010] Furthermore, a polytetrafluoro guide sleeve is installed in the second wire hole.

[0011] Furthermore, the electrode wire clamping mechanism includes an electrode wire clamping plate and an electrode wire pressing plate; the electrode wire clamping plate is provided with electrode wire fixing holes, and the hole spacing of the electrode wire fixing holes matches the projected hole spacing of the group of holes to be processed on the turbine guide vane; after the upper ends of each electrode wire pass through the electrode wire fixing holes respectively, they are pressed by the electrode wire pressing plate.

[0012] Furthermore, the upper parts of the two screws pass through the upper cross beam of the clamping end and cooperate with the clearance therewith, and the upper cross beam of the clamping end is fixed to the screw by two first nuts which are sleeved outside the screw and located on both sides of the upper cross beam of the clamping end; the lower parts of the two screws are threadedly connected to the wire guide plate and are locked by the second nuts.

[0013] Furthermore, the upper parts of the cylindrical guide column and the chamfered edge guide column respectively pass through the clamping end upper crossbeam, and bushings are arranged between the clamping end upper crossbeam and the chamfered edge guide column, and between the clamping end upper crossbeam and the cylindrical guide column. The chamfered edge guide column, the clamping end upper crossbeam and the bushing are connected as one body, and the cylindrical guide column, the clamping end upper crossbeam and the bushing are connected as one body; the middle and lower parts of the cylindrical guide column and the chamfered edge guide column are both threadedly connected to the first flat plate of the wire guide plate and are locked by a third nut; the lower parts of the cylindrical guide column and the chamfered edge guide column are located below the first flat plate of the wire guide plate, and are installed in cooperation with the guide sleeve, and can move up and down in the guide sleeve; the guide section cross section of the chamfered edge guide column is a rhombus, and the guide section cross section of the cylindrical guide column is a circle;

[0014] The guide sleeve is mounted on the blade mounting plate.

[0015] Furthermore, the clamping mechanism includes a bracket, a right-angle lever and a locking screw; the upper part of the bracket is fixedly mounted on the side wall of the second inclined plate of the blade mounting plate, the lower part of the bracket is hinged to the middle part of the right-angle lever, and the right-angle lever can swing to a certain extent relative to the hinge; threaded holes are processed at the corresponding parts of the upper arm of the right-angle lever and the bracket, and the locking screw is installed in the threaded holes of the right-angle lever and the bracket. When the locking screw presses against the blade mounting plate and cannot continue to move along its axis, continuing to tighten the locking screw can cause the lower arm of the right-angle lever to swing upward to press against the back of the turbine guide vane and clamp it.

[0016] Furthermore, a recess is processed on the side wall of the second inclined plate of the blade mounting plate at a position in contact with the set screw, and the set screw is a round-end set screw.

[0017] Furthermore, a second cylindrical pin is installed at the tail of the set screw to facilitate the manipulation of the set screw.

[0018] Beneficial effects of the utility model:

[0019] 1. The fixture of the utility model adopts a top-down structural design. First, the axis of the hole group of the processed part is placed in a vertical position, and then a suitable solid geometric element such as a plane, a step, etc. is selected on the processed part as a positioning support surface. Under this premise, the blade mounting plate of the fixture is designed so that after the blade is clamped on the blade mounting plate, the axis of the hole group to be processed on it can be perpendicular to the machine table; then the opposite surface of the positioning surface of the processed part is selected for clamping, and under this premise, the clamping mechanism of the fixture is designed to limit the six degrees of freedom of the processed part so that it is in a fully positioned state. Therefore, the utility model can ensure that a group of cooling holes to be processed on the turbine guide vane occupies the correct position relative to the EDM machine tool, and can maintain reliable positioning after positioning, prevent the electrode wire from drifting during the working process, and ensure the stability of the processing process.

[0020] 2. The utility model is easy to operate and can complete the processing of a group of 9 small holes in spatial positions at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the machined part (turbine guide blade).

[0022] Figure 2 It is a three-dimensional diagram of the clamp of the utility model.

[0023] Figure 3 It is a partial cross-sectional view of the clamp of the utility model.

[0024] Figure 4 yes Figure 3 Sectional view at SS.

[0025] Figure 5 It is a structural schematic diagram of a blade mounting plate in the utility model.

[0026] Figure 6 It is a structural schematic diagram of the wire guide plate in the utility model.

[0027] Figure 7 It is a schematic diagram of the positional relationship between the blade mounting plate and the processed part (turbine guide blade) in the utility model.

[0028] Figure 8 It is a schematic diagram of the positional relationship among the blade mounting plate, the processed parts (turbine guide blades) and the bracket in the utility model.

[0029] Fig. 9 The utility model is a schematic diagram of the positional relationship among the blade mounting plate, the processed parts (turbine guide blades), the bracket, the right-angle lever and the set screws.

[0030] Reference numerals:

[0031] Shelf components

[0032] 7-cylindrical guide column; 8-wire guide plate; 81-first flat plate; 82-first inclined plate; 9-screw; 10-cross beam on clamping end; 11-bushing; 12-clamping handle; 13-chamfered guide column; 14-electrode wire clamping plate; 15-electrode wire pressing plate; 19-first nut; 23-second nut; 24-third nut; 26-screw.

[0033] Remove the components

[0034] 1-base plate; 2-column; 3-welding bushing; 4-blade mounting plate; 41-second flat plate; 42-second inclined plate; 421-second thread hole; 422-threaded hole; 423-boss; 424-pit; 5-insulating bushing; 6-guide sleeve; 16-bracket; 17-right-angle lever; 18-setting screw; 28-first cylindrical pin; 29-second cylindrical pin.

[0035] 21-cooling hole; 22-blade; 221-groove; 27-electrode wire. DETAILED DESCRIPTION

[0036] In order to make the technical solution and advantages of the present invention more clearly understood, the present invention is further described below.

[0037] like Figure 1-2 As shown, the fixture for machining space group holes on turbine guide vane provided by the utility model comprises an upper frame assembly and a lower frame assembly arranged up and down; the upper frame assembly is connected to the moving end of the electric spark machine tool and can make pulsed up and down motion relative to the lower frame assembly, and the upper end of the electrode wire is fixed by the upper frame assembly; the blade 22 (the part to be machined) is fixed by the lower frame assembly, and the lower end of the electrode wire falls on the surface of the area to be machined of the part to be machined and contacts therewith.

[0038] The upper frame assembly is a frame structure, including a clamping end upper crossbeam 10, a wire guide plate 8, an electrode wire clamping plate 14, an electrode wire pressing plate 15, a screw 9, a chamfered guide column 13, a cylindrical guide column 7 and a clamping handle 12.

[0039] The upper crossbeam 10 of the clamping end is arranged up and down with the wire guide plate 8 and is parallel to each other; there are two screw rods 9, and the upper parts of the two screw rods 9 pass through the upper crossbeam 10 of the clamping end and are matched with the clearance therebetween, and the upper crossbeam 10 of the clamping end is fixed to the screw rod 9 by two first nuts 19 which are sleeved outside the screw rod 9 and located on both sides of the upper crossbeam 10 of the clamping end; the lower parts of the two screw rods 9 are threadedly connected with the wire guide plate 8 and are locked by the second nut 23; the upper crossbeam 10 of the clamping end, the wire guide plate 8 and the screw rod 9 form a height-adjustable frame structure, and when the height needs to be adjusted, the first nut 19 is loosened, and then the position of the upper crossbeam 10 of the clamping end on the screw rod 9 is adjusted up and down, and the first nut 19 can be tightened again after adjustment. The reason why the upper frame assembly of the utility model is designed to be height-adjustable is that the electrode wire will be consumed during the working process. When the electrode wire becomes shorter, the height of the upper frame assembly can be reduced so that the lower end of the electrode wire can always be in contact with the area to be processed of the part.

[0040] The electrode wire clamping plate 14 is arranged in the middle of the upper crossbeam 10 of the clamping end; the electrode wire holding plate 14 is provided with electrode wire fixing holes, and the hole spacing of the electrode wire fixing holes matches the projected hole spacing of the group of holes to be processed on the blade 22 (the processed part); after the upper ends of the electrode wires pass through the electrode wire fixing holes on the electrode wire holding plate 14 respectively, they are pressed by the electrode wire pressing plate 15, so that the upper ends of the electrode wires are fixed to the middle of the upper crossbeam 10 of the clamping end.

[0041] like Figure 6 As shown, the wire guide plate 8 includes a first flat plate 81 and a first inclined plate 82. The first flat plate 81 and the first inclined plate 82 are both provided with first wire holes for each electrode wire to pass vertically. The inclination angle of the first inclined plate 82 and the position of the first wire hole can ensure that the electrode wire passes vertically through the first wire hole; the two ends of the first flat plate 81 are provided with first threaded holes 812 respectively used for threaded cooperation with the two screw rods 9, and second threaded holes 811 respectively used for threaded cooperation with the cylindrical guide column 7 and the chamfered guide column 13.

[0042] Two through holes are provided on the upper crossbeam 10 of the clamping end, and the upper parts of the chamfered guide pillar 13 and the cylindrical guide pillar 7 respectively pass through the two through holes on the upper crossbeam 10 of the clamping end, and bushings 11 are provided between the upper crossbeam 10 of the clamping end and the chamfered guide pillar 13, and between the upper crossbeam 10 of the clamping end and the cylindrical guide pillar 7. The chamfered guide pillar 13, the upper crossbeam 10 of the clamping end and the bushings 11 are connected as a whole, and the cylindrical guide pillar 7, the upper crossbeam 10 of the clamping end and the bushings 11 are connected as a whole; the middle and lower parts of the chamfered guide pillar 13 and the cylindrical guide pillar 7 have threads, which are connected with the guide wire plate 8. The flat plate 81 is threadedly connected and locked by a third nut 24. The lower parts of the chamfered guide column 13 and the cylindrical guide column 7 are located below the flat plate 81 of the wire guide plate 8. The parts of the chamfered guide column 13 and the cylindrical guide column 7 located below the flat plate 81 of the wire guide plate 8 are used for matching and installing with the guide sleeve 6 in the lower frame assembly, and the cross-section of the matching part of the chamfered guide column 13 and the guide sleeve 6 is diamond-shaped; the chamfered guide column 13, the cylindrical guide column 7 and the guide sleeve 6 together constitute a guiding structure to guide the upper frame assembly when the upper frame assembly as a whole moves up and down relative to the lower frame assembly.

[0043] The clamping handle 12 is installed on the upper end surface of the cross beam 10 on the clamping end by means of screws 26. The upper frame assembly as a whole is connected to the moving end of the EDM machine tool through the clamping handle 12, and the upper frame assembly as a whole moves with the moving end of the EDM machine tool.

[0044] The lower frame assembly is also a frame structure, including a base plate 1, a blade mounting plate 4, a column 2, a welding bushing 3, and a clamping mechanism mainly composed of a bracket 16 and a right-angle lever 17.

[0045] The blade mounting plate 4 is used to mount the blade 22 (processed parts), and its structure is as follows: Figure 5As shown, it includes a second flat plate 41 and a second inclined plate 42 connected to each other; the second flat plate 41 is arranged below the first flat plate 81 of the wire guide plate 8 in the upper frame assembly; a first through hole 411 is respectively opened at both ends of the second flat plate 41, and guide sleeves 6 are installed in the two first through holes 411, and the cylindrical guide column 7 and the chamfered guide column 13 in the upper frame assembly are respectively installed in the two guide sleeves 6, and can move up and down in the guide sleeves 6; insulating bushings 5 ​​are installed between the guide sleeves 6 and the cylindrical guide column 7, and between the guide sleeves 6 and the chamfered guide column 13, so as to insulate the two electrodes located on the upper frame assembly and the lower frame assembly; the second inclined plate 42 is arranged below the first inclined plate 82 of the wire guide plate 8, and the two are parallel, and the end surface of the second inclined plate 42 is opened with a hole for the electrode wire The second wire hole 421 passes through, and a threaded hole 422 for installing the bracket 16 is opened on the side wall of the second inclined plate 42; the end of the second inclined plate 42 is processed with a boss 423 corresponding to the groove 221 on the outer edge of the blade 22 (the processed part). When installing the blade 22, the boss 423 can be first inserted into the groove 221 of the blade 22, and then the blade 22 is clamped by the clamping mechanism; the inclination angle of the second inclined plate 42 and the position of the second wire hole 421 thereon are matched with the first inclined plate 82 of the wire guide plate 8 to ensure that each electrode wire passes through the second wire hole 421 vertically respectively; at the same time, a polytetrafluoroethylene guide sleeve for guiding and supporting the electrode wire is also installed in the second wire hole 421 of the second inclined plate 42, so that the electrode wire can be positioned and maintained during processing to prevent the electrode wire from drifting.

[0046] The base plate 1 is arranged below the blade mounting plate 4 and is parallel to the flat plate 41 of the blade mounting plate 4; the base plate 1 is used to fix the lower frame assembly as a whole on the workbench of the electric spark machine tool; the column 2 is vertically arranged on the base plate 1, the lower end is connected to the base plate 1, and the upper end is connected to the blade mounting plate 4 through a welding bushing 3.

[0047] like Figure 4As shown, the clamping mechanism includes a bracket 16, a right-angle lever 17 and a set screw 18. The upper part of the bracket 16 is fixedly mounted on the side wall of the second inclined plate 42 of the blade mounting plate 4, and the lower part of the bracket 16 is hinged to the middle part of the right-angle lever 17 through the first cylindrical pin 28, and the right-angle lever 17 can swing to a certain extent relative to the hinge. The upper arm of the right-angle lever 17 and the bracket 16 are processed with threaded holes at the corresponding positions, and the set screw 18 is installed in the threaded holes of the right-angle lever 17 and the bracket 16. When the set screw abuts against the blade mounting plate 4 and cannot continue to move along its axis, continuing to tighten the set screw 18 can convert the rotational movement of the set screw 18 into the outward movement of the right-angle lever 17 along the axis of the set screw 18, so that the lower arm of the right-angle lever 17 presses against the back of the blade 22 (processed part) to achieve reliable clamping of the blade 22. The utility model also installs a second cylindrical pin 29 at the tail of the set screw 18 , the axis of which is perpendicular to the axis of the set screw 18 , so as to facilitate the control of the set screw 18 .

[0048] To further improve the reliability of clamping, the utility model can also process a shallow pit 424 on the side wall of the second inclined plate 42 of the blade mounting plate 4 at the location in contact with the set screw 18, and the set screw 18 is a round-end set screw.

[0049] The use method of the clamp provided by the utility model:

[0050] 1. Positioning and clamping:

[0051] The groove 221 of the turbine guide blade is placed outside the boss 423 of the blade mounting plate 4 in the utility model, the bracket 16 is mounted on the blade mounting plate 4, and the right-angle lever 17 is mounted on the bracket 16 through the set screw 18. When the set screw 18 is turned, the right-angle lever 17 swings so that its lower arm presses the back of the turbine guide blade, so that the upper surface of the blade edge plate is closely attached to the second inclined plate 41 of the positioning mounting plate 4. At this time, the turbine guide blade has limited six degrees of freedom and is in a fully positioned state.

[0052] 2.Threading:

[0053] Insert the electrode wire 27 from top to bottom into the polytetrafluoro guide sleeve in the second wire hole 421 on the electrode wire clamping plate 14, the wire guide plate 8, and the blade mounting plate 4. Be very careful during this process and do not bend the electrode wire because the electrode wire is thin and long. Then manually bend the excess electrode wire at one end of the electrode wire clamping plate 14 and press it tightly with the electrode wire pressing plate 15.

[0054] 3. Start the machine tool, adjust the movement process and processing parameters, and then start EDM.

Claims

1. A fixture for machining a space group hole on a turbine guide vane, characterized in that: It comprises an upper frame assembly and a lower frame assembly arranged up and down; the upper frame assembly is connected to the moving end of the electric discharge machine tool and can make pulsed up and down movements relative to the lower frame assembly; the lower frame assembly is fixedly mounted on the working table of the electric discharge machine tool; during machining, the turbine guide vane is fixed by the lower frame assembly, the upper end of the electrode wire is fixed by the upper frame assembly, and the lower end of the electrode wire falls on the surface of the turbine guide vane to be machined and contacts with the surface; The upper frame assembly includes a height-adjustable frame structure consisting of an upper crossbeam at the clamping end, a wire guide plate and two screws, an electrode wire clamping mechanism arranged in the middle of the upper crossbeam at the clamping end, and a clamping handle arranged on the upper end surface of the upper crossbeam at the clamping end for connecting with the moving end of the electric discharge machine; the wire guide plate includes a first flat plate and a first inclined plate, and the first flat plate and the first inclined plate are both provided with a first wire hole for each electrode wire to pass through, and the inclination angle of the first inclined plate and the position of the first wire hole can ensure that the electrode wire passes through the first wire hole vertically; The lower frame assembly includes a frame structure composed of a bottom plate, a column and a blade mounting plate, and a clamping mechanism arranged on the side wall of the blade mounting plate for clamping the turbine guide vane to be processed; the blade mounting plate includes a second flat plate and a second inclined plate, the second flat plate is located below the first flat plate of the wire guide plate and is parallel to it, and the second inclined plate is located below the first inclined plate of the wire guide plate and is parallel to it; the second inclined plate is provided with a second wire hole for each electrode wire to pass through, the inclination angle of the second inclined plate and the second wire hole are matched with the first inclined plate and the first wire hole to ensure that the electrode wire passes through the second wire hole vertically; the end of the second inclined plate has a boss matching the groove on the outer edge of the turbine guide vane, before processing, the boss is inserted into the groove, and the clamping mechanism is used to press the back of the turbine guide vane, so that the turbine guide vane can be clamped and fixed on the blade mounting plate; When the upper frame assembly moves relative to the lower frame assembly, it is guided by a guide mechanism; the guide mechanism includes a cylindrical guide column and a chamfered guide column fixedly connected to the upper frame assembly, and a guide sleeve installed on the upper part of the lower frame assembly and respectively cooperating with the cylindrical guide column and the chamfered guide column; the upper frame assembly is guided by the cooperation between the cylindrical guide column and the guide sleeve, and between the chamfered guide column and the guide sleeve; Insulating bushings are installed between the guide sleeve and the cylindrical guide post, and between the guide sleeve and the chamfered guide post, so as to insulate the two electrodes located on the upper frame assembly and the lower frame assembly.

2. The fixture for machining space group holes on turbine guide vane according to claim 1, characterized in that: A polytetrafluoro guide sleeve is installed in the second wire hole.

3. The fixture for machining space group holes on turbine guide vane according to claim 1, characterized in that: The electrode wire clamping mechanism includes an electrode wire clamping plate and an electrode wire pressing plate; the electrode wire clamping plate is provided with electrode wire fixing holes, and the hole spacing of the electrode wire fixing holes matches the projected hole spacing of the group of holes to be processed on the turbine guide vane; the upper ends of each electrode wire pass through the electrode wire fixing holes respectively and are then pressed by the electrode wire pressing plate.

4. The fixture for machining space group holes on turbine guide vane according to claim 1, characterized in that: The upper parts of the two screws pass through the upper cross beam of the clamping end and cooperate with the clearance therewith, and the upper cross beam of the clamping end is fixed to the screw by two first nuts which are sleeved outside the screw and located on both sides of the upper cross beam of the clamping end; the lower parts of the two screws are threadedly connected to the wire guide plate and are locked by the second nuts.

5. The fixture for machining space group holes on turbine guide vane according to any one of claims 1 to 4, characterized in that: The upper parts of the cylindrical guide column and the chamfered guide column respectively pass through the clamping end upper crossbeam, and bushings are arranged between the clamping end upper crossbeam and the chamfered guide column, and between the clamping end upper crossbeam and the cylindrical guide column. The chamfered guide column, the clamping end upper crossbeam and the bushing are connected as one body, and the cylindrical guide column, the clamping end upper crossbeam and the bushing are connected as one body; the middle and lower parts of the cylindrical guide column and the chamfered guide column are both threadedly connected to the first flat plate of the wire guide plate and are locked by a third nut; the lower parts of the cylindrical guide column and the chamfered guide column are located below the first flat plate of the wire guide plate, and are installed in cooperation with the guide sleeve, and can move up and down in the guide sleeve; the guide section cross section of the chamfered guide column is a rhombus, and the guide section cross section of the cylindrical guide column is a circle; The guide sleeve is mounted on the blade mounting plate.

6. The fixture for machining space group holes on turbine guide vane according to claim 5, characterized in that: The clamping mechanism comprises a bracket, a right-angle lever and a set screw; the upper part of the bracket is fixedly mounted on the side wall of the second inclined plate of the blade mounting plate, the lower part of the bracket is hinged to the middle part of the right-angle lever, and the right-angle lever can swing to a certain extent relative to the hinge; threaded holes are processed at the corresponding parts of the upper arm of the right-angle lever and the bracket, and the set screw is installed in the threaded holes of the right-angle lever and the bracket. When the set screw abuts against the blade mounting plate and cannot continue to move along its axis, continuing to tighten the set screw can make the lower arm of the right-angle lever swing upward to press against the back of the turbine guide vane and clamp it.

7. The fixture for machining space group holes on turbine guide vane according to claim 6, characterized in that: A recess is processed on the side wall of the second inclined plate of the blade mounting plate at a position in contact with the set screw, and the set screw is a round-end set screw.

8. The fixture for machining space group holes on turbine guide vane according to claim 7, characterized in that: A second cylindrical pin is installed at the tail of the set screw to facilitate the manipulation of the set screw.

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