CN210452430U - Special fixture for contour machining of air inlet edge of precision forging blade - Google Patents
Special fixture for contour machining of air inlet edge of precision forging blade Download PDFInfo
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- CN210452430U CN210452430U CN201921073024.4U CN201921073024U CN210452430U CN 210452430 U CN210452430 U CN 210452430U CN 201921073024 U CN201921073024 U CN 201921073024U CN 210452430 U CN210452430 U CN 210452430U
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Abstract
The utility model provides a special fixture of finish forge blade air inlet edge contour machining, its air inlet edge contour machining that can solve current finish forge blade adopts manual throwing to repair, and machining efficiency is low, the precision is poor, repair the problem that personnel required height to throwing. The positioning device comprises a bottom plate, a positioning seat and a hinge seat, wherein a profiling positioning surface which is adaptive to a back arc profile is arranged at the right end of the front side surface of the positioning seat, a blade root positioning block and a blade tip positioning block are fixedly arranged on the positioning seat below the profiling positioning surface respectively, and an axial positioning pin for positioning the edge plate surface of a precision forging blade is fixedly arranged on the right side surface of the positioning seat; the hinge base is located the positioning seat front side, and the hinge piece is installed through vertical round pin axle rotation on the hinge base, installs blade root compact heap and apex compact heap on the hinge piece respectively, and the hinge piece is rotatable and fixes on the positioning seat, and blade root compact heap and apex compact heap are just to the profile modeling locating surface and profile modeling respectively and are compressed tightly the root and the crown of the interior arc profile of finish forge blade.
Description
Technical Field
The utility model relates to a finish forge blade processing frock field specifically is a special fixture of finish forge blade air inlet edge contour machining.
Background
The precision forging blade is an important part of an aeroengine, and because the blade profile is complex, the positioning difficulty is high, and the positioning precision is poor, the profile machining of the air inlet edge of the traditional precision forging blade adopts a manual polishing mode, each blade needs multiple times of repeated polishing, detection and polishing, the requirement on polishing and repairing personnel is high, the qualification rate of the blade is extremely difficult to ensure through the manual mode particularly for the blade with a strict tolerance requirement on the air inlet edge profile, the number of polishing and repairing wheels is multiplied, and the product machining cycle is greatly prolonged.
Disclosure of Invention
The machining of admitting air limit profile to current finish forge blade adopts manual throwing to repair, and machining efficiency is low, the precision is poor, to throwing the technical problem that repairment personnel required height, the utility model provides a special fixture of finish forge blade admitting air limit profile machining, it can realize the stable clamping to the finish forge blade to can use the milling to replace the manual throwing of tradition to repair the machining admitting air limit profile, improve machining efficiency and machining precision, save artifically.
The technical scheme is as follows: the utility model provides a special fixture of finish forge blade inlet edge contour machining which characterized in that: the positioning seat is fixedly provided with a blade root positioning block for supporting and positioning the exhaust edge root part of the finish-forged blade and a blade tip positioning block for supporting and positioning the exhaust edge crown part of the finish-forged blade, and the right side surface of the positioning seat is fixedly provided with an axial positioning pin for positioning the edge plate surface of the finish-forged blade; the hinge base is located on the front side of the positioning base, the hinge base is rotatably provided with a hinge block through a vertical hinge pin, the hinge block is respectively provided with a blade root pressing block and a blade tip pressing block, the hinge block can rotate and is fixed on the positioning base, and the blade root pressing block and the blade tip pressing block are right opposite to the profiling positioning surface and respectively profile-press the root and the crown of the inner arc molded surface of the finish-forged blade.
It is further characterized in that:
the top surfaces of the blade root positioning block and the blade tip positioning block are exhaust edge positioning surfaces, the exhaust edge positioning surfaces are inclined surfaces, and the inclination angles of the two exhaust edge positioning surfaces are matched with the section angles of the finish forged blades at the corresponding positions, so that the exhaust edge positioning surfaces are in point contact with the exhaust edge points of the finish forged blades.
The left side surface of the hinge seat is provided with a rectangular groove which is through from front to back, the vertical pin shaft is fixed in the rectangular groove, the right end of the hinge block is inserted into the rectangular groove in a matched mode and is in rotating connection with the vertical pin shaft, the left side surface of the hinge block is provided with a abdicating groove which is through from front to back, the front side surface of the hinge block is rotatably provided with a quick-change gasket, and a gap of the quick-change gasket faces downwards and can rotationally shield the abdicating groove; the first screw penetrates through the abdicating groove from front to back and is assembled on the positioning seat in a threaded mode, a spherical washer, a conical washer and a belleville spring washer are sequentially sleeved on the first screw from front to back, and a notch of the quick-change washer can be rotatably sleeved on the first screw and is clamped between the belleville spring washer and the hinge block.
The blade root pressing block is fixedly installed on the hinge block through a second screw, and an upper root profiling surface and a lower root profiling surface which are matched with the root shape of the inner arc profile are arranged on the rear side of the blade root pressing block.
The blade tip compact heap can be movably installed in front and back on the hinge piece, the rear side of blade tip compact heap is equipped with two upper and lower with the crown profile surface that the crown shape of inner arc profile is adapted, still install on the hinge piece and be used for promoting backward the retaining member of blade tip compact heap.
The hinge comprises a hinge block and is characterized in that a rear side surface of the hinge block is provided with a vertically through mounting groove, a front side surface of the hinge block is provided with a threaded hole communicated with the mounting groove, a locking screw is assembled in the threaded hole, a blade tip pressing block is installed in the mounting groove in a clearance fit manner, the blade tip pressing block is further provided with a long hole extending in the front-back direction, a horizontal pin shaft is arranged in the long hole in a penetrating manner, two ends of the horizontal pin shaft are fixedly assembled on the hinge block, and the locking screw abuts against the front end surface of the blade tip pressing block and can push the blade tip pressing block backwards.
And an avoidance hole for avoiding a shroud boss of the precisely forged blade is formed in the front side surface of the positioning seat.
The utility model has the advantages that:
the special fixture of the utility model, the profile modeling locating surface on the locating seat can locate the displacement freedom degree of the blade inner back direction, the rotational freedom degree of the air intake and exhaust direction and the axial rotational freedom degree, the blade root locating piece and the blade tip locating piece can locate the displacement freedom degree of the blade air intake and exhaust direction and the radial rotational freedom degree, the axial locating pin can locate the axial displacement freedom degree of the blade, the blade is compacted by the blade root compacting block and the blade tip compacting block after the blade is correctly located, finally, the profile modeling six-point location of the precisely forged blade is realized, after the blade is clamped, the clamping state is always stable and reliable in the processing process, the technical problems of large positioning difficulty and poor positioning precision caused by the complex blade profile are solved, thereby the air intake edge profile does not need to be manually cast and repaired, the air intake edge profile can be processed in place directly by milling, once the fixture is debugged to be qualified, the method can be used for stably processing in batches without repeated detection-polishing, greatly improves the processing efficiency, shortens the processing period, has good product quality consistency, and can greatly improve the product percent of pass and the stability of the blade with tighter contour tolerance of the air inlet edge.
Drawings
Fig. 1 is a front view of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 5 is a schematic view of an installation structure of the positioning seat and the bottom plate;
FIG. 6 is a schematic view of the installation structure of the hinge base, the hinge block and the bottom plate;
fig. 7 is a schematic view of the entire structure of the finish forged blade.
Reference numerals: 1-precision forging of blades; 2-back arc profile; 3-exhausting edge; 4-edge plate surface; 5-inner arc profile; 6-air inlet side; 7-shroud boss; 11-a base plate; 12-positioning seats; 13-a hinge mount; 14-profiling positioning surfaces; 15-a blade root locating block; 16-a blade tip positioning block; 17-an axial locating pin; 18-a vertical pin; 19-a hinge block; 20-a blade root compact block; 21-blade tip compact block; 22-exhaust edge positioning surface; 23-a rectangular groove; 24-a yield slot; 25-step screw for fulcrum; 26-quick change washer; 27-a notch; 28-screw one; 29-spherical washer; 30-a conical washer; 31-belleville spring washers; 32-screw two; 33-root profile; 34-crown contouring surface; 36-a locking screw; 37-long hole; 38-horizontal pin axis; 39-avoiding holes; 40-inner hexagonal socket head cap screw.
Detailed Description
Referring to fig. 1 to 7, the utility model relates to a special fixture for contour machining of a gas inlet edge of a precision forging blade, the positioning device comprises a base plate 11, and a positioning seat 12 and a hinge seat 13 which are fixedly arranged on the base plate 11 through screws and positioning pins respectively, wherein the right end of the front side surface of the positioning seat 12 is provided with a profiling positioning surface 14 adapted to a back arc profile 2 of a finish forging blade 1, the left side of the positioning seat is provided with an avoidance hole 39 for avoiding a blade crown boss 7 of the finish forging blade 1, a blade root positioning block 15 for supporting and positioning the root of an exhaust edge 3 of the finish forging blade 1 and a blade tip positioning block 16 for supporting and positioning the crown of the exhaust edge 3 of the finish forging blade 1 are fixedly arranged on the positioning seat 12 below the profiling positioning surface 14 respectively, the blade root positioning block 15 and the blade tip positioning block 16 can be fixed on the positioning seat 12 through inner hexagonal cylindrical head screws 17 respectively, and the installation positions of the blade root positioning block 15 and the blade; an axial positioning pin 17 for positioning the flange plate surface 4 of the finish forged blade 1 is fixedly arranged on the right side surface of the positioning seat 12; the hinge base 13 is located on the front side of the positioning base 12, the hinge base 13 is rotatably provided with a hinge block 19 through a vertical pin shaft 18, the hinge block 19 is respectively provided with a blade root pressing block 20 and a blade tip pressing block 21, the hinge block 19 can be rotated and fixed on the positioning base 12, the blade root pressing block 20 and the blade tip pressing block 21 are right opposite to the profiling positioning surface 14 and respectively profile-press and press the root part and the crown part of the inner arc molded surface 5 of the finish-forged blade 1, and the installation positions of the blade root pressing block 20 and the blade tip pressing block 21 and the distance between the blade root pressing block 20 and the blade tip pressing block.
Referring to fig. 2, 3 and 5, the top surfaces of the blade root positioning block 15 and the blade tip positioning block 16 are exhaust edge positioning surfaces 22, the exhaust edge positioning surfaces 22 are inclined surfaces, and the inclination angles of the two exhaust edge positioning surfaces 22 are adapted to the section angles of the finish forged blades 1 at the corresponding positions, so that the exhaust edge positioning surfaces 22 are in point contact with the exhaust edges 3 of the finish forged blades 1. The blade root positioning block and the blade tip positioning block are in point contact with the exhaust edge of the precision forging blade, so that the exhaust edge can be positioned more accurately and stably.
Referring to fig. 1, 2, 4 and 6, a rectangular groove 23 which is through from front to back is formed in the left side surface of the hinge seat 13, the vertical pin shaft 18 is fixed in the rectangular groove 23, the right end of the hinge block 19 is inserted into the rectangular groove 23 in a matching manner and is rotationally connected with the vertical pin shaft 18, so that the hinge block 19 can rotate backwards to approach the positioning seat 12 or rotate forwards to be away from the positioning seat 12, a back-to-front through abdicating groove 24 is formed in the left side surface of the hinge block 19, a step screw 25 for a fulcrum is fixedly connected to the right side of the abdicating groove 24 on the front side surface of the hinge block 19, a gap 27 of a quick-change gasket 26 faces downwards to shield the abdicating groove 24, and the right end; the front side surface of the positioning seat 12 is provided with a first threaded hole corresponding to the relief groove 24, the first threaded hole is internally provided with a first screw 28, the cylindrical head of the first screw 28 can extend to the front side of the relief groove 24, the first screw 28 is sleeved with a spherical washer 29, a conical washer 30 and a belleville spring washer 31 from front to back, the notch 27 of the quick-change washer 26 can rotatably sleeve the first screw 28, and the quick-change washer 26 is clamped between the belleville spring washer 31 and the hinge block 19. So design, after the hinge piece rotated to target in place, can be with screw one preliminary screw in screw hole one, then rotate the quick change packing ring and entangle screw one, at last with screw one locking again, owing to set up spherical packing ring and conical surface packing ring, even hinge piece and positioning seat nonparallel, spherical packing ring and conical surface packing ring also can the self-adaptation angle, guarantee to be connected reliable and stable between hinge piece and the positioning seat, the belleville spring packing ring can play the effect of taut screw one, further improve the structural stability in the course of working.
Referring to fig. 3, 4 and 6, the blade root pressing block 20 is fixedly mounted on the hinge block 19 through a second screw 32, and the rear side of the blade root pressing block 20 is provided with an upper root profiling surface 33 and a lower root profiling surface 33 which are matched with the root shape of the inner arc-shaped surface 5; the blade tip pressing block 21 is movably arranged on the hinge block 19 in the front-back direction, the upper crown profiling surface 34 and the lower crown profiling surface 34 which are matched with the crown shape of the inner arc profiling surface 5 are arranged on the rear side of the blade tip pressing block 21, and a locking piece used for pushing the blade tip pressing block 21 backwards is further arranged on the hinge block 19. Root profile and crown profile all set up two, can make to compress tightly the effect better, through adjusting the retaining member, can further ensure that apex compact heap effectively compresses tightly the inner arc profile.
Referring to fig. 4 and 6, in this embodiment, a rear side surface of the hinge block 19 is provided with a vertically through mounting groove, a front side surface is provided with a second threaded hole communicated with the mounting groove, a locking screw 36 is assembled in the second threaded hole, the blade tip pressing block 21 is installed in the mounting groove in a clearance fit manner, the blade tip pressing block 21 is further provided with a long hole 37 extending in the front-back direction, a horizontal pin shaft 38 is arranged in the long hole 37 in a penetrating manner, two ends of the horizontal pin shaft are fixedly assembled on the hinge block 19, and the locking screw 36 abuts against a front end surface of the blade tip pressing block 21 and can push the blade tip pressing block 21 backwards. Therefore, the blade tip pressing block can be pushed to press the blade by rotating the locking screw, the structure is simple, and the adjustment is convenient.
Adopt below the concrete description the utility model discloses the process of anchor clamps clamping blade:
1) contacting an exhaust edge 3 of the finish-forged blade 1 with a blade root positioning block 15 and a blade tip positioning block 16, and contacting the back arc molded surface 2 with a profiling positioning surface 14 on the positioning seat 12;
2) axially adjusting the position of the edge plate of the finish-forged blade 1 to enable the edge plate surface 4 to be attached to the axial positioning pin 17;
3) further confirming the positioning and attaching state of the back arc molded surface 2 and the exhaust edge 3;
4) rotating the hinge block 19 to enable the blade root pressing block 20 and the blade tip pressing block 21 to contact and attach to the inner arc molded surface 5 of the finish forged blade 1, screwing in the first screw 28, rotating the quick-change washer 26 to sleeve the first screw 28, and further locking the first screw 28 to fix the position of the blade;
5) and screwing in the locking screw 36 to fix the blade tip pressing block 21, realizing auxiliary pressing, completing workpiece clamping, and processing the air inlet edge 6.
Claims (7)
1. The utility model provides a special fixture of finish forge blade inlet edge contour machining which characterized in that: the positioning seat is fixedly provided with a blade root positioning block for supporting and positioning the exhaust edge root part of the finish-forged blade and a blade tip positioning block for supporting and positioning the exhaust edge crown part of the finish-forged blade, and the right side surface of the positioning seat is fixedly provided with an axial positioning pin for positioning the edge plate surface of the finish-forged blade; the hinge base is located on the front side of the positioning base, the hinge base is rotatably provided with a hinge block through a vertical hinge pin, the hinge block is respectively provided with a blade root pressing block and a blade tip pressing block, the hinge block can rotate and is fixed on the positioning base, and the blade root pressing block and the blade tip pressing block are right opposite to the profiling positioning surface and respectively profile-press the root and the crown of the inner arc molded surface of the finish-forged blade.
2. The special fixture for machining the profile of the suction edge of the finish forged blade according to claim 1, wherein the fixture comprises: the top surfaces of the blade root positioning block and the blade tip positioning block are exhaust edge positioning surfaces, the exhaust edge positioning surfaces are inclined surfaces, and the inclination angles of the two exhaust edge positioning surfaces are matched with the section angles of the finish forged blades at the corresponding positions, so that the exhaust edge positioning surfaces are in point contact with the exhaust edge points of the finish forged blades.
3. The special fixture for machining the profile of the suction edge of the precision forging blade as claimed in claim 1 or 2, wherein: the left side surface of the hinge seat is provided with a rectangular groove which is through from front to back, the vertical pin shaft is fixed in the rectangular groove, the right end of the hinge block is inserted into the rectangular groove in a matched mode and is in rotating connection with the vertical pin shaft, the left side surface of the hinge block is provided with a abdicating groove which is through from front to back, the front side surface of the hinge block is rotatably provided with a quick-change gasket, and a gap of the quick-change gasket faces downwards and can rotationally shield the abdicating groove; the first screw penetrates through the abdicating groove from front to back and is assembled on the positioning seat in a threaded mode, a spherical washer, a conical washer and a belleville spring washer are sequentially sleeved on the first screw from front to back, and a notch of the quick-change washer can be rotatably sleeved on the first screw and is clamped between the belleville spring washer and the hinge block.
4. The special fixture for machining the profile of the suction edge of the precision forging blade as claimed in claim 1 or 2, wherein: the blade root pressing block is fixedly installed on the hinge block through a second screw, and an upper root profiling surface and a lower root profiling surface which are matched with the root shape of the inner arc profile are arranged on the rear side of the blade root pressing block.
5. The special fixture for machining the profile of the suction edge of the precision forging blade as claimed in claim 1 or 2, wherein: the blade tip compact heap can be movably installed in front and back on the hinge piece, the rear side of blade tip compact heap is equipped with two upper and lower with the crown profile surface that the crown shape of inner arc profile is adapted, still install on the hinge piece and be used for promoting backward the retaining member of blade tip compact heap.
6. The special fixture for machining the profile of the suction edge of the finish forged blade according to claim 5, wherein the fixture comprises: the hinge comprises a hinge block and is characterized in that a rear side surface of the hinge block is provided with a vertically through mounting groove, a front side surface of the hinge block is provided with a threaded hole communicated with the mounting groove, a locking screw is assembled in the threaded hole, a blade tip pressing block is installed in the mounting groove in a clearance fit manner, the blade tip pressing block is further provided with a long hole extending in the front-back direction, a horizontal pin shaft is arranged in the long hole in a penetrating manner, two ends of the horizontal pin shaft are fixedly assembled on the hinge block, and the locking screw abuts against the front end surface of the blade tip pressing block and can push the blade tip pressing block backwards.
7. The special fixture for machining the profile of the suction edge of the precision forging blade as claimed in claim 1 or 2, wherein: and an avoidance hole for avoiding a shroud boss of the precisely forged blade is formed in the front side surface of the positioning seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921073024.4U CN210452430U (en) | 2019-07-10 | 2019-07-10 | Special fixture for contour machining of air inlet edge of precision forging blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921073024.4U CN210452430U (en) | 2019-07-10 | 2019-07-10 | Special fixture for contour machining of air inlet edge of precision forging blade |
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| Publication Number | Publication Date |
|---|---|
| CN210452430U true CN210452430U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921073024.4U Active CN210452430U (en) | 2019-07-10 | 2019-07-10 | Special fixture for contour machining of air inlet edge of precision forging blade |
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| CN (1) | CN210452430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238776A (en) * | 2019-07-10 | 2019-09-17 | 无锡航亚科技股份有限公司 | The special fixture of precision forged blade leading edge contour machining |
| CN113587849A (en) * | 2021-09-07 | 2021-11-02 | 无锡航亚科技股份有限公司 | Polishing and repairing method applied to contour realization of front edge and rear edge of precision forging blade |
-
2019
- 2019-07-10 CN CN201921073024.4U patent/CN210452430U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238776A (en) * | 2019-07-10 | 2019-09-17 | 无锡航亚科技股份有限公司 | The special fixture of precision forged blade leading edge contour machining |
| CN113587849A (en) * | 2021-09-07 | 2021-11-02 | 无锡航亚科技股份有限公司 | Polishing and repairing method applied to contour realization of front edge and rear edge of precision forging blade |
| CN113587849B (en) * | 2021-09-07 | 2023-12-22 | 无锡航亚科技股份有限公司 | Polishing and repairing method applied to profile realization of front and tail edges of precisely forged blade |
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