CN112496485B - Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole - Google Patents
Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole Download PDFInfo
- Publication number
- CN112496485B CN112496485B CN202011278092.1A CN202011278092A CN112496485B CN 112496485 B CN112496485 B CN 112496485B CN 202011278092 A CN202011278092 A CN 202011278092A CN 112496485 B CN112496485 B CN 112496485B
- Authority
- CN
- China
- Prior art keywords
- positioning
- blade
- machining
- pin
- film hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/22—Electrodes specially adapted therefor or their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/14—Making holes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a positioning fixture for machining a gas film hole at a shielding part of a duplex block casting guide blade, which is used for designing a set of positioning fixture without reference conversion for machining gas film holes at a gas inlet side and a gas exhaust side by taking six points of a blade body as a reference according to the machining characteristics of parts, and machining a shielding area between two blades; the left blade air inlet side clamp and the right blade air inlet side clamp have the same structure; the left blade exhaust side clamp and the right blade exhaust side clamp are identical in structure. According to the invention, the machining of the air film hole at the interference part of the integral duplex guide blade of a certain machine is successfully completed by adopting a tool setting and track path avoiding feed mode outside the interference region and matching with a multi-axis vector machining method.
Description
Technical Field
The invention relates to the technical field of machining of turbine guide blades of aircraft engines, in particular to a positioning fixture for machining a gas film hole in a shielding part of a duplex block-cast guide blade and a machining method of the gas film hole.
Background
The turbine guide vane is a key pneumatic component of an aeroengine, in order to improve the overall performance of the engine, reduce air flow loss and improve structural strength in recent years, a duplex integral casting structure is added in a turbine guide vane family, the casting process of the turbine guide vane is complex, the related processing technology difficulty of parts is extremely high, and a gas film hole at a shielding part between flow passages of two adjacent vanes cannot be processed by a traditional electric spark puncher (see figure 1) due to the narrow processing interval and a plurality of interference points.
Disclosure of Invention
In order to solve the technical problems, the positioning fixture for processing the air film hole at the shielding part of the duplex block-cast guide blade and the processing method of the air film hole have the following specific technical scheme:
a positioning fixture for machining a gas film hole at a shielding part of a duplex block casting guide blade is designed according to the part machining characteristics, a set of positioning fixture which is used for machining gas film holes at a gas inlet side and a gas exhaust side by taking six points of a blade body as a reference and can machine a shielding area between two blades without reference conversion is designed, the positioning fixture comprises a left blade gas inlet side fixture, a right blade gas inlet side fixture, a left blade gas exhaust side fixture, a right blade gas exhaust side fixture and a fast avoidance motor holder, and two sets of fixtures and electrode holders are required to be matched for machining different hole positions;
the left blade air inlet side clamp and the right blade air inlet side clamp are identical in structure;
the left blade exhaust side clamp and the right blade exhaust side clamp are identical in structure.
The preferred scheme of the positioning fixture for machining the air film hole at the shielding part of the duplex block-cast guide blade is that the left blade air inlet side fixture comprises a support frame, a bottom plate, a rotary positioning block, a rotary supporting block, an air inlet edge positioning block, a supporting block b, a pressing plate a, an upper edge plate positioning pin a supporting block, a positioning pin a, a supporting block a, a stop pin, a movable air inlet edge positioning block, a stop block, a knurled screw a, a knurled screw b, a positioning process ball, a light supporting block a, an inner hexagonal socket head screw and a cylindrical pin A type;
the support frame is of a general L shape and is used for processing an air film hole on the upper edge plate side;
fixing the bottom plate on the support frame through screws; the rotary supporting block is positioned on the bottom plate through an inner hexagonal socket head cap screw and a cylindrical pin A type, the rotary positioning block is rotated through the cylindrical pin A type, positioning is realized through a stop pin, angular positioning of the blade is realized in a pressing state, and a detachable function is realized through a knurled screw b after positioning is finished;
the air inlet edge positioning block is positioned on the bottom plate through an inner hexagonal cylindrical head screw and a cylindrical pin A type, and the movable air inlet edge positioning block is fixed on the air inlet edge positioning block 5 through a stop block and a screw, so that the axial positioning function of the blade is realized;
the upper edge plate positioning pin a supporting block is positioned on the bottom plate through an inner hexagonal socket head cap screw and a cylindrical pin A type, and the positioning pin a is fixed on the upper edge plate positioning pin a supporting block to realize the radial positioning function of the blade;
the light support a is fixed on the bottom plate and has an auxiliary support function on the blade, the support block a and the support block b are fixed on the bottom plate through the hexagon socket head cap screws, and the pressure plate a compresses the blade through the knurled screw a;
the positioning process ball is fixed on the bottom plate and used when the clamp is used for centering.
The preferred scheme of the positioning fixture for machining the air film hole at the shielding part of the duplex block-cast guide blade is that the left blade exhaust side fixture comprises a chassis, a process ball, a thin nut, an adjusting support, a pressing plate B, a star-shaped bolt a, a light support B, a support, a star-shaped bolt B, a turnover positioning seat, a screw a, a pin a, a positioning sample plate A, a positioning sample plate B, a pressing support, a screw B, a section positioning block, a positioning pin B, a positioning pin support and a pin B;
the support frame used on the left blade exhaust side clamp is the same as the support frame on the left blade air inlet side clamp;
the chassis is fixed on the support frame through screws; the method is used for processing the air film hole on the lower flange side;
the process ball pin is fixed on the chassis and used when the clamp aligns the center;
the support is fixed on the chassis through a screw b and a pin a, the turnover positioning seat is installed on the support, the rotation function is realized through the pin, and the fixing function is realized through a star-shaped bolt b;
the positioning sample plate A and the positioning sample plate B are fixed on the turnover positioning seat through a screw a and a pin a, and the blade is axially positioned;
the section positioning block is fixed on the chassis through a screw b and a pin a, so that the angular positioning function of the blade is realized;
the positioning pin support is fixed on the chassis through a screw b and a pin b, and the positioning pin b is fixed on the positioning pin support to realize the radial positioning function of the blade;
the pressing support is fixed on the chassis through a screw b, the light support is fixed on the chassis and the pressing support and used for assisting in positioning of parts, and the blade pressing mechanism is formed by the star-shaped bolt a, the adjusting support, the thin nut and the pressing plate, so that the function of pressing the blade is achieved.
A processing pair is connected whole and is cast positioning fixture that guide vane sheltered from position air film hole, its preferred scheme is that anchor clamps six point location sets up: the clamp for processing the left blade exhaust side shielding air film hole designs a positioning point D1, a positioning point F1, a positioning point D2 and a positioning point F2 as movable air inlet edge positioning blocks of the positioning points, a positioning point J1 is designed as a rotary positioning block of a detachable structure, and a positioning point B1 is designed as a positioning pin a of the fixed positioning point; a positioning point D1, a positioning point F1, a positioning point D2 and a positioning point F2 of the clamp for processing the air inlet side shielding air film hole are designed into a positioning sample plate A and a positioning sample plate B of a detachable structure, and a positioning point J1 and a positioning point B1 are designed into a positioning block and a positioning pin B of a fixed positioning point section.
The preferable scheme of the positioning fixture for processing the air film hole at the shielding part of the duplex block casting guide blade is that the upper end of the quick avoiding motor holder is provided with a wire passing hole, and the wire passing hole is processed by a small hole machine according to a design angle.
A method for processing a gas film hole at a shielding part of a duplex block casting guide vane,
step 1: sequentially mounting a left blade air inlet side clamp, a right blade air inlet side clamp, a left blade exhaust side clamp and a right blade exhaust side clamp on equipment, and fixing the equipment through fastening screws after the equipment passes through a right side aligning surface aligning clamp; when the upper and lower edge plates are machined, the L-shaped support frame is fixed on equipment, then the fixture body is fixed on the support frame, and the fixture is aligned; six points of the first clamping are in full contact, the secondary contact of the detachable structure points still ensures the contact and prevents the workpiece from being crushed, which is the key of the clamping of the clamp, the position of the positioning block is adjusted to find a balance point, and the blade is compressed by the compression block;
step 2: punching a hole on the quick avoidance electrode holder by using a small hole machine, then installing the electrode wire on the electrode holder, and leveling the electrode surface by using linear cutting equipment;
and 3, step 3: the method comprises the following steps that a fast avoidance electrode holder is installed on equipment, each air film hole in an interference area has an upper air film hole angle and a lower air film hole angle in opposite directions, two electrode holders are required to be designed for each air film hole, and a wire penetrating hole angle designed on each electrode holder is required to be consistent with the air film hole angle;
in the machining process, the machining electrode is arranged on the electrode holder, the length of the whole row of electrodes is inconsistent after the installation is finished, the wire electrode angle needs to be designed according to the leaf profile, the electrode is cut off by using linear cutting, and the theoretical inlet angle of the electrode is ensured;
in the row electrode trial machining process, the electrodes are trimmed again according to the discharge condition of the whole row of electrodes, so that all the electrodes are ensured to be simultaneously contacted with parts during machining, and the influence of uneven electrode discharge on the machining quality of the gas film hole is avoided;
and 4, step 4: installing the blades, removing the detachable structure, placing the part into a clamp, fixing the detachable positioning structure, detecting the six-point contact part after the part is fixed, detaching and fixing the detachable positioning mechanism again, and detecting the six-point contact part;
and 5: starting a machining program to perform trial machining, and adjusting the length of the row electrodes according to the trial machining condition;
step 6: formally processing the electrode after adjustment, and adjusting processing parameters and a feed track to ensure the processing quality of the air film hole;
and 7: after one side of the same exhaust film hole is machined, replacing the electrode with another angle, and performing formal machining after alignment and trial machining to complete the machining of the exhaust film hole;
and 8: processing the air film holes in the interference area of the left blade according to the step 2-7, and detaching the parts after finishing the air film holes in all the interference areas;
and step 9: the electrode holder is replaced after the part is fixed, so that the position consistency of the air film hole can be ensured, and the processing quality is improved;
step 10: and after the aperture size and the position degree of the processed air film hole are detected to be qualified, the tool is dismounted.
The invention has the beneficial effects that:
1) according to the invention, by designing different processing clamps, the tool setting and track path avoiding feed mode outside the integral casting interference region is solved;
2) the invention solves the problems that the electrode plates of the air film holes in different rows and different positions are frequently replaced and repeatedly positioned with low precision and the overall processing efficiency is influenced by using the rapid avoidance electrode holder;
3) by optimizing a reasonable processing scheme, adopting a tool setting and track path avoiding feed mode outside an interference region and matching with a multi-axis vector processing method, the problem of processing the air film hole at the interference part of the integral duplex guide blade of a certain machine is solved.
Drawings
FIG. 1 is a view of a masked gas film hole machining area;
FIG. 2 is a view of a blade positioning structure;
FIG. 3 is a drawing of a left blade air inlet side fixture structure a;
FIG. 4 is a top view of the left blade air inlet side fixture;
FIG. 5 is a view showing the structure of A-A in FIG. 4;
FIG. 6 is a drawing of a left blade air inlet side fixture structure b;
FIG. 7 is a view showing the structure of a jig on the exhaust side of the left blade;
FIG. 8 is a side view of a left blade exhaust side clamp;
FIG. 9 is a view of a structure of a fast avoiding motor clamper;
fig. 10 is a view showing an electrode holding portion.
In the figure, 1, a support frame 2, a bottom plate 3, a rotary positioning block 4, a rotary supporting block 5, an air inlet edge positioning block 6, a supporting block B7, a pressing plate a 8, an upper edge plate positioning pin supporting block 9, a positioning pin a10, a supporting block a 11, a stop pin 12, a movable air inlet edge positioning block 13, a stop 14, a knurled screw a 15, a knurled screw B16, a positioning process ball 17, a light support a 18, an inner hexagonal socket head screw 19, a cylindrical pin A type 21, a chassis 22, a process ball 23, a thin nut 24, an adjusting support 25, a pressing plate B26, a star-shaped bolt a 27, a light support B28, a support 29, a star-shaped bolt B30, an overturning positioning seat 31, a screw a32, a pin a33, a positioning template A34, a positioning template B35, a pressing support 36, a screw B37, a, The section positioning block 38, the positioning pin b 39, the positioning pin support 40, the pin b 50, the fast avoiding motor clamp 51 and the wire passing hole.
Detailed Description
As shown in fig. 3-10, a set of positioning fixture for machining the air film hole at the shielding part of the duplex block casting guide blade is designed according to the part machining characteristics, wherein the positioning fixture is used for machining the air film hole at the air inlet side and the air exhaust side by taking six points of the blade body as a reference, and machining a shielding area between two blades without reference conversion, and comprises a left blade air inlet side fixture, a right blade air inlet side fixture, a left blade air exhaust side fixture, a right blade air exhaust side fixture and a fast avoidance motor holder 50, and two sets of fixtures and electrode holders are matched for machining different hole sites;
the left blade air inlet side clamp and the right blade air inlet side clamp are identical in structure;
the left blade exhaust side clamp and the right blade exhaust side clamp are identical in structure.
The left blade air inlet side clamp comprises a support frame 1, a bottom plate 2, a rotary positioning block 3, a rotary supporting block 4, an air inlet side positioning block 5, a supporting block b6, a pressing plate a7, an upper edge plate positioning pin a supporting block 8, a positioning pin a9, a supporting block a10, a stop pin 11, a movable air inlet side positioning block 12, a stop block 13, a knurled screw a14, a knurled screw b15, a positioning process ball 16, a light support a17, an inner hexagonal cylindrical head screw 18 and a cylindrical pin A-shaped 19;
the support frame 1 is of a general L shape and is used for processing an air film hole on the upper edge plate side;
fixing the bottom plate 2 on the support frame 1 through screws; the rotary supporting block 4 is positioned on the bottom plate 2 through an inner hexagonal cylindrical head screw and a cylindrical pin A type, the rotary positioning block 3 is rotated through the cylindrical pin A19 type, positioning is realized through the stop pin 11, angular positioning of the blade is realized in a pressing state, and a detachable function is realized through a knurled screw b15 after positioning is finished;
the air inlet edge positioning block 5 is positioned on the bottom plate 2 through an inner hexagonal socket head cap screw 18 and a cylindrical pin A-shaped 19, and the movable air inlet edge positioning block 12 is fixed on the air inlet edge positioning block 5 through a stop block 13 and a screw, so that the axial positioning function of the blade is realized;
the upper edge plate positioning pin a supporting block 8 is positioned on the bottom plate 2 through an inner hexagonal socket head cap screw 1 and a cylindrical pin A-shaped 19, and a positioning pin a9 is fixed on the upper edge plate positioning pin a supporting block 8, so that the radial positioning function of the blade is realized;
the light support a17 is fixed on the bottom plate 2 to play an auxiliary support function for the blade, the support block a10 and the support block b6 are fixed on the bottom plate 2 through the hexagon socket head cap screws 18, and the pressure plate a7 compresses the blade through the knurled screws a 14;
the positioning process ball 16 is fixed on the bottom plate 2 and is used when the clamp is used for centering.
The left blade exhaust side clamp comprises a chassis 21, a process ball 22, a thin nut 23, an adjusting support 24, a pressure plate B25, a star bolt a26, a light support B27, a support 28, a star bolt B29, an overturning positioning seat 30, a screw a31, a pin a32, a positioning template A33, a positioning template B34, a pressing support 35, a screw B36, a section positioning block 37, a positioning pin B38, a positioning pin support 39 and a pin B40;
the support frame used on the left blade exhaust side clamp is the same as the support frame on the left blade air inlet side clamp;
the chassis 21 is fixed on the support frame 1 through screws; the method is used for processing the air film hole on the lower flange side;
the process ball pin 22 is fixed on the chassis 21 and used when the clamp is used for centering;
the support 28 is fixed on the chassis 21 through a screw b26 and a pin a22, the turnover positioning seat 30 is installed on the support 28, the pin 40 realizes a rotating function, and the star-shaped bolt b29 realizes a fixing function;
the positioning sample plate A33 and the positioning sample plate B34 are fixed on the overturning positioning seat 30 through a screw a31 and a pin a32, and perform a positioning function on the axial direction of the blade;
the section positioning block 37 is fixed on the chassis 21 through a screw b36 and a pin a32, so that the angular positioning function of the blade is realized;
the positioning pin support 39 is fixed on the chassis 21 through a screw b36 and a pin b40, and the positioning pin b38 is fixed on the positioning pin support 39, so that the radial positioning function of the blade is realized;
the pressing support 35 is fixed on the chassis 21 through a screw b36, the light support 27 is fixed on the chassis 21 and the pressing support 35 and used for auxiliary positioning of parts, and the blade pressing mechanism is formed by the star-shaped bolt a26, the adjusting support 24, the thin nut 23 and the pressing plate 25 to realize the function of pressing the blade.
Six-point positioning of the clamp is as follows: the clamp for processing the left blade exhaust side shielding air film hole designs a positioning point D1, a positioning point F1, a positioning point D2 and a positioning point F2 into a movable air inlet edge positioning block 12 of a fixing point, a positioning point J1 is designed into a rotary positioning block 3 of a detachable structure, and a positioning point B1 is designed into a positioning pin a9 of the fixing positioning point; the positioning point D1, the positioning point F1, the positioning point D2 and the positioning point F2 of the clamp for processing the air inlet side shielding air film hole are designed into a positioning sample plate A33 and a positioning sample plate B34 which are detachable structures, and the positioning point J1 and the positioning point B1 are designed into a positioning block 37 and a positioning pin B38 of a fixed positioning point section.
The upper end of the quick avoidance motor holder 50 is provided with a wire penetrating hole 51, and the wire penetrating hole 51 is processed by a small hole machine according to a design angle.
A method for processing a gas film hole at a shielding part of a duplex block casting guide vane,
step 1: sequentially mounting a left blade air inlet side clamp, a right blade air inlet side clamp, a left blade exhaust side clamp and a right blade exhaust side clamp on equipment, and fixing the equipment through fastening screws after the equipment passes through a right side aligning surface aligning clamp; when the upper and lower edge plates are machined, the L-shaped support frame 1 is fixed on equipment, then the fixture body is fixed on the support frame 1, and the fixture is aligned; six points of the first clamping are in full contact, the secondary contact of the detachable structure points still ensures the contact and prevents the workpiece from being crushed, which is the key of the clamping of the clamp, the position of the positioning block is adjusted to find a balance point, and the blade is compressed by the compression block;
step 2: punching a hole on the fast avoidance electrode holder 50 by using a small hole machine, then installing the electrode wire on the electrode holder, and leveling the electrode surface by using linear cutting equipment;
and 3, step 3: installing a fast avoiding electrode holder 50 on equipment, wherein each air film hole of an air film hole in an interference area has an upper air film hole angle and a lower air film hole angle in opposite directions, two electrode holders are required to be designed for each air film hole, and the angle of a threading hole 51 designed on each electrode holder is required to be consistent with the angle of the air film hole;
in the machining process, the machining electrode is arranged on the electrode holder, the length of the whole row of electrodes is inconsistent after the installation is finished, the wire electrode angle needs to be designed according to the leaf profile, the electrode is cut off by using linear cutting, and the theoretical inlet angle of the electrode is ensured;
in the row electrode trial machining process, the electrodes are trimmed again according to the discharge condition of the whole row of electrodes, so that all the electrodes are ensured to be simultaneously contacted with parts during machining, and the influence of uneven electrode discharge on the machining quality of the gas film hole is avoided;
and 4, step 4: installing the blades, removing the detachable structure, placing the part into a clamp, fixing the detachable positioning structure, detecting the six-point contact part after the part is fixed, detaching and fixing the detachable positioning mechanism again, and detecting the six-point contact part;
and 5: starting a machining program to perform trial machining, and adjusting the length of the row electrodes according to the trial machining condition;
step 6: formally processing the electrode after adjustment, and adjusting processing parameters and a feed track to ensure the processing quality of the air film hole;
and 7: after one side of the same exhaust film hole is machined, replacing the electrode with another angle, and performing formal machining after alignment and trial machining to complete the machining of the exhaust film hole;
and 8: processing the air film holes in the interference area of the left blade according to the step 2-7, and detaching the parts after finishing the air film holes in all the interference areas;
and step 9: the electrode holder is replaced after the part is fixed, so that the position consistency of the air film hole can be ensured, and the processing quality is improved;
step 10: and after the aperture size and the position degree of the processed air film hole are detected to be qualified, the tool is dismounted.
Claims (4)
1. A positioning fixture for machining an air film hole at a shielding part of a duplex block casting guide blade is characterized in that a set of positioning fixture which is used for machining air inlet side and air outlet side shielding air film holes by taking six points of a blade body as a reference and can machine a shielding area between two blades without reference conversion is designed according to part machining characteristics, and comprises a left blade air inlet side fixture, a right blade air inlet side fixture, a left blade air outlet side fixture, a right blade air outlet side fixture and a fast avoiding motor holder, wherein two sets of fixtures and electrode holders are matched for machining different hole positions;
the left blade air inlet side clamp and the right blade air inlet side clamp are identical in structure;
the left blade exhaust side clamp and the right blade exhaust side clamp have the same structure;
the left blade air inlet side clamp comprises a support frame, a bottom plate, a rotary positioning block, a rotary supporting block, an air inlet edge positioning block, a supporting block b, a pressing plate a, an upper edge plate positioning pin a supporting block, a positioning pin a, a supporting block a, a stop pin, a movable air inlet edge positioning block, a stop block, a knurled screw a, a knurled screw b, a positioning process ball, a light support a, an inner hexagonal socket head cap screw and a cylindrical pin A type;
the support frame is of a general L shape and is used for processing an air film hole on the upper edge plate side;
fixing the bottom plate on the support frame through screws; the rotary supporting block is positioned on the bottom plate through an inner hexagonal socket head cap screw and a cylindrical pin A type, the rotary positioning block is rotated through the cylindrical pin A type, positioning is realized through a stop pin, angular positioning of the blade is realized in a pressing state, and a detachable function is realized through a knurled screw b after positioning is finished;
the air inlet edge positioning block is positioned on the bottom plate through an inner hexagonal cylindrical head screw and a cylindrical pin A type, and the movable air inlet edge positioning block is fixed on the air inlet edge positioning block through a stop block and a screw, so that the axial positioning function of the blade is realized;
the upper edge plate positioning pin a supporting block is positioned on the bottom plate through an inner hexagonal socket head cap screw and a cylindrical pin A type, and the positioning pin a is fixed on the upper edge plate positioning pin a supporting block to realize the radial positioning function of the blade;
the light support a is fixed on the bottom plate and has an auxiliary support function on the blade, the support block a and the support block b are fixed on the bottom plate through the hexagon socket head cap screws, and the pressure plate a compresses the blade through the knurled screw a;
the positioning process ball is fixed on the bottom plate and is used when the clamp is used for centering;
the left blade exhaust side clamp comprises a chassis, a process ball, a thin nut, an adjusting support, a pressing plate B, a star-shaped bolt a, a light support B, a support, a star-shaped bolt B, a turnover positioning seat, a screw a, a pin a, a positioning sample plate A, a positioning sample plate B, a pressing support, a screw B, a section positioning block, a positioning pin B, a positioning pin support and a pin B;
the support frame used on the left blade exhaust side clamp is the same as the support frame on the left blade air inlet side clamp;
the chassis is fixed on the support frame through screws; the method is used for processing the air film hole on the lower flange side;
the process ball pin is fixed on the chassis and used when the clamp aligns the center;
the support is fixed on the chassis through a screw b and a pin a, the turnover positioning seat is installed on the support, the rotation function is realized through the pin, and the fixing function is realized through a star-shaped bolt b;
the positioning sample plate A and the positioning sample plate B are fixed on the turnover positioning seat through a screw a and a pin a, and the blade is axially positioned;
the section positioning block is fixed on the chassis through a screw b and a pin a, so that the angular positioning function of the blade is realized;
the positioning pin support is fixed on the chassis through a screw b and a pin b, and the positioning pin b is fixed on the positioning pin support to realize the radial positioning function of the blade;
the pressing support is fixed on the chassis through a screw b, the light support is fixed on the chassis and the pressing support and used for assisting in positioning of parts, and the blade pressing mechanism is formed by the star-shaped bolt a, the adjusting support, the thin nut and the pressing plate, so that the function of pressing the blade is achieved.
2. The positioning fixture for machining the air film hole at the shielding part of the double-connection block casting guide vane as claimed in claim 1, wherein six points of the fixture are positioned: the clamp for processing the left blade exhaust side shielding air film hole designs a positioning point D1, a positioning point F1, a positioning point D2 and a positioning point F2 as movable air inlet edge positioning blocks of the positioning points, a positioning point J1 is designed as a rotary positioning block of a detachable structure, and a positioning point B1 is designed as a positioning pin a of the fixed positioning point; a positioning point D1, a positioning point F1, a positioning point D2 and a positioning point F2 of the clamp for processing the air inlet side shielding air film hole are designed into a positioning sample plate A and a positioning sample plate B of a detachable structure, and a positioning point J1 and a positioning point B1 are designed into a positioning block and a positioning pin B of a fixed positioning point section.
3. The positioning fixture for machining the air film hole at the shielding part of the duplex block casting guide vane as claimed in claim 1, wherein a threading hole is formed at the upper end of the fast avoiding motor holder, and the threading hole is machined by a small hole machine according to a design angle.
4. A method for processing a gas film hole by using the positioning fixture for processing the gas film hole at the shielding part of the duplex block-cast guide vane as claimed in claim 1,
step 1: sequentially mounting a left blade air inlet side clamp, a right blade air inlet side clamp, a left blade exhaust side clamp and a right blade exhaust side clamp on equipment, and fixing the equipment through fastening screws after the equipment passes through a right side aligning surface aligning clamp; when the upper and lower edge plates are machined, the L-shaped support frame is fixed on equipment, then the fixture body is fixed on the support frame, and the fixture is aligned; six points of the first clamping are in full contact, secondary contact of detachable structure points still ensures contact without crushing a workpiece is the key of clamping of the clamp, the position of the positioning block is adjusted, a balance point is found, and the blade is compressed through the compression block;
step 2: punching a hole on the quick avoidance electrode holder by using a small hole machine, then installing the electrode wire on the electrode holder, and leveling the electrode surface by using linear cutting equipment;
and 3, step 3: the method comprises the following steps that a fast avoidance electrode holder is installed on equipment, each air film hole in an interference area has an upper air film hole angle and a lower air film hole angle in opposite directions, two electrode holders are required to be designed for each air film hole, and a wire penetrating hole angle designed on each electrode holder is required to be consistent with the air film hole angle;
in the machining process, the machining electrode is arranged on the electrode holder, the length of the whole row of electrodes is inconsistent after the installation is finished, the wire electrode angle needs to be designed according to the leaf profile, the electrode is cut off by using linear cutting, and the theoretical inlet angle of the electrode is ensured;
in the row electrode trial machining process, the electrodes are trimmed again according to the discharge condition of the whole row of electrodes, so that all the electrodes are ensured to be simultaneously contacted with parts during machining, and the influence of uneven electrode discharge on the machining quality of the gas film hole is avoided;
and 4, step 4: installing the blades, removing the detachable structure, placing the part into a clamp, fixing the detachable positioning structure, detecting the six-point contact part after the part is fixed, detaching and fixing the detachable positioning mechanism again, and detecting the six-point contact part;
and 5: starting a machining program to perform trial machining, and adjusting the length of the row electrodes according to the trial machining condition;
step 6: formally processing the electrode after adjustment, and adjusting processing parameters and a feed track to ensure the processing quality of the air film hole;
and 7: after one side of the same exhaust film hole is machined, replacing the electrode with another angle, and performing formal machining after alignment and trial machining to complete the machining of the exhaust film hole;
and 8: processing the air film holes in the interference area of the left blade according to the step 2-7, and detaching the parts after finishing the air film holes in all the interference areas;
and step 9: the electrode holder is replaced after the part is fixed, so that the position consistency of the air film hole can be ensured, and the processing quality is improved;
step 10: and (4) dismounting the tool after the aperture size and the position degree of the processed air film hole are detected to be qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011278092.1A CN112496485B (en) | 2020-11-16 | 2020-11-16 | Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011278092.1A CN112496485B (en) | 2020-11-16 | 2020-11-16 | Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112496485A CN112496485A (en) | 2021-03-16 |
| CN112496485B true CN112496485B (en) | 2022-08-09 |
Family
ID=74958048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011278092.1A Active CN112496485B (en) | 2020-11-16 | 2020-11-16 | Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112496485B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910104B (en) * | 2021-09-29 | 2022-09-13 | 中国航发动力股份有限公司 | Throat equivalent adjusting device in turbine guide vane processing |
| CN113681322A (en) * | 2021-09-29 | 2021-11-23 | 中国航发动力股份有限公司 | Blade positioning key end face machining clamping device and method |
| CN113953859B (en) * | 2021-12-21 | 2022-05-17 | 成都和鸿科技股份有限公司 | Six point positioning tool for blade |
| CN114227536A (en) * | 2021-12-30 | 2022-03-25 | 无锡透平叶片有限公司 | Grinding fixture suitable for turbine multi-connected guide vane part assembly |
| CN115157123A (en) * | 2022-08-25 | 2022-10-11 | 南京农业大学 | Fixture and grinding method for grinding upper citron plate side face and lower citron plate air inlet edge of gas turbine guide vane fan-shaped piece |
| CN115488537A (en) * | 2022-10-21 | 2022-12-20 | 中国航发沈阳黎明航空发动机有限责任公司 | Rectifier assembly weld gap control method and special spot welding tool |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8742279B2 (en) * | 2010-02-01 | 2014-06-03 | United Technologies Corporation | Method of creating an airfoil trench and a plurality of cooling holes within the trench |
| CN103894733B (en) * | 2014-04-10 | 2016-06-01 | 西安航空动力股份有限公司 | The laser processing fixture of a kind of turborotor air film hole |
| CN205074819U (en) * | 2015-10-30 | 2016-03-09 | 沈阳黎明航空发动机(集团)有限责任公司 | Anchor clamps in processing guide blade blade air film hole |
| CN106270859B (en) * | 2016-08-29 | 2018-06-01 | 中航动力股份有限公司 | A kind of guide vane listrium dustpan hole machined is quickly remodeled clamping device and method |
| CN108372411B (en) * | 2016-12-20 | 2020-04-17 | 中国航空制造技术研究院 | Flexible locking and positioning device and positioning method for blade air film hole machining |
| CN108994407B (en) * | 2018-08-14 | 2020-05-15 | 中国航发南方工业有限公司 | Four-linkage guide blade interference air film hole positioning clamp, machining device and machining method |
-
2020
- 2020-11-16 CN CN202011278092.1A patent/CN112496485B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112496485A (en) | 2021-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112496485B (en) | Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole | |
| CN108994407B (en) | Four-linkage guide blade interference air film hole positioning clamp, machining device and machining method | |
| CN106378477B (en) | Device for processing multiple surfaces of part | |
| CN106695499B (en) | A kind of guide vane multistation continuous grinding device and method | |
| CN113681183B (en) | Special fixture for welding multi-weld-seam leaf-ring parts and welding deformation control method | |
| CN112676661A (en) | Process device for electrically processing gas film hole by high-pressure turbine guide blade | |
| CN109514449A (en) | Blade annular sector side entry machining is general to exempt from debugging tool and its application method | |
| CN114633011B (en) | Clamp device for electron beam welding blind welding and alignment method | |
| CN116967477A (en) | Blade batch material-increasing repair tool and blade batch repair method | |
| CN110421372A (en) | A kind of round positioning fixture and its application method | |
| CN212420429U (en) | HSK handle of a knife of high positioning accuracy of quick change | |
| CN108436150B (en) | Cylinder head inclined hole processing tool | |
| CN221415798U (en) | Flexible fixture for blisk | |
| CN117020239B (en) | Technological method for improving utilization rate of burrs of T-shaped plate part of aero-engine | |
| CN220112809U (en) | Clamp for step valve machining | |
| CN111761512A (en) | High-precision high-efficiency convenient novel thimble | |
| CN221817349U (en) | Special tool for machining eccentric shaft part of medium-speed machine | |
| CN110712075A (en) | Negative chamfering machining clamp for cutter and using method of negative chamfering machining clamp | |
| CN214770398U (en) | Pneumatic automatic anchor clamps of hinge type | |
| CN220259647U (en) | Double-shaft neck blade type face milling fixture of aeroengine | |
| CN219900281U (en) | Motor casing composite boring cutter | |
| CN111805020B (en) | Nozzle assembly part swirler electric spark punching auxiliary tool and use method | |
| CN117506772A (en) | Double-station machining clamp and machining method for radial diffuser | |
| CN219131572U (en) | Clamp for machining machine tool | |
| CN113567044B (en) | Dynamic balance clamp device for turbojet engine compressor rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |