CN110238776A - The special fixture of precision forged blade leading edge contour machining - Google Patents
The special fixture of precision forged blade leading edge contour machining Download PDFInfo
- Publication number
- CN110238776A CN110238776A CN201910620596.8A CN201910620596A CN110238776A CN 110238776 A CN110238776 A CN 110238776A CN 201910620596 A CN201910620596 A CN 201910620596A CN 110238776 A CN110238776 A CN 110238776A
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- blade
- positioning
- compact heap
- precision forged
- hinge
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- Pending
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- 238000003754 machining Methods 0.000 title claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 3
- 238000007906 compression Methods 0.000 claims abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention provides a kind of special fixture of precision forged blade leading edge contour machining, the leading edge contour machining that can solve existing precision forged blade is repaired using throwing by hand, and processing efficiency is low, low precision, repairs the high problem of personnel requirement to throwing.It includes bottom plate, positioning seat and hinge seat, the leading flank right end of positioning seat is equipped with the profiling positioning surface being adapted with convex profile, it is located at below profiling positioning surface on positioning seat and is fixedly installed with blade root locating piece and blade tip locating piece respectively, the axially position pin in the listrium face for positioning precision forged blade is fixedly installed on the right side of positioning seat；Hinge seat is located on front side of positioning seat, hinge block is rotatably equipped with by vertical pin shaft on hinge seat, blade root compact heap and blade tip compact heap are separately installed in hinge block, hinge block is rotatable and is fixed on positioning seat, and the root and bizet of blade root compact heap and blade tip compact heap face profiling positioning surface and the interior arc shaped surface of difference profiling compression precision forged blade.
Description
Technical field
The present invention relates to precision forged blade processing tool field, specially a kind of precision forged blade leading edge contour machining it is dedicated
Fixture.
Background technique
Precision forged blade is the important component of aero-engine, and due to its blade profile complexity, positioning difficulty is big, positioning accuracy is poor,
Therefore the leading edge contour machining of traditional precision forged blade is in such a way that throwing is repaired by hand, every blade requires take turns more and throws repeatedly
It repairs-detection-to throw and repair, and repairs that personnel requirement is higher to throwing, tighter blade is required especially for leading edge profile tolerance, passes through hand
The extremely difficult guarantee blade qualification rate of work mode, and throwing repairs wheel number and is doubled and redoubled, and delays the product process-cycle significantly.
Summary of the invention
Leading edge contour machining for existing precision forged blade be using by hand throwing repair, processing efficiency is low, low precision, to throwing
The high technical problem of personnel requirement is repaired, the present invention provides a kind of special fixture of precision forged blade leading edge contour machining, energy
It realizes the stabilization clamping to precision forged blade, so as to use Milling Machining that traditional-handwork throwing is replaced to repair processing gas inlet edge profile, mentions
High processing efficiency and machining accuracy are saved artificial.
Its technical solution is such that a kind of special fixture of precision forged blade leading edge contour machining, it is characterised in that: its
Including bottom plate and the positioning seat and hinge seat that are respectively and fixedly installed on the bottom plate, the leading flank right end of the positioning seat is set
There is the profiling positioning surface being adapted with the convex profile of precision forged blade, is located at below the profiling positioning surface on the positioning seat and divides
It is not fixedly installed with the blade root locating piece for being used to support the exhaust side root for positioning the precision forged blade and is used to support positioning institute
The blade tip locating piece of the exhaust side bizet of precision forged blade is stated, is fixedly installed on the right side of the positioning seat described for positioning
The axially position pin in the listrium face of precision forged blade；The hinge seat is located on front side of the positioning seat, by perpendicular on the hinge seat
It is rotatably equipped with hinge block to pin shaft, blade root compact heap and blade tip compact heap, the hinge are separately installed in the hinge block
Block is rotatable and is fixed on the positioning seat, and profiling described in the blade root compact heap and the blade tip compact heap face positions
Face and respectively profiling compress root and the bizet of the interior arc shaped surface of the precision forged blade.
It is further characterized by:
The top surface of the blade root locating piece and the blade tip locating piece is exhaust side positioning surface, and the exhaust side positioning surface is inclination
The section angle in face, the tilt angle and the precision forged blade of respective corresponding position of two exhaust side positioning surfaces is adapted,
Contact the exhaust side positioning surface with the exhaust edge point of the precision forged blade.
The rectangular channel that front and back penetrates through is provided on the left side of the hinge seat, the vertical pin shaft is fixed on the rectangular channel
Interior, the right end cooperation of the hinge block is inserted into the rectangular channel and is rotatablely connected with the vertical pin shaft, a left side for the hinge block
It is provided with the recessing groove that front and back penetrates through on side, is rotatably equipped with quick change washer, the quick change pad on the leading flank of the hinge block
The notch of circle blocks the recessing groove downward and rotatably；Screw one passes through the recessing groove and Screw assembly in institute from front to back
It states on positioning seat, is successively set with spheric washer, taper faced washer and butterfly spring washer on the screw one from front to back, it is described
The notch of quick change washer rotatably entangles the screw one and the quick change washer is clamped in the butterfly spring washer and described
Between hinge block.
The blade root compact heap is fixedly mounted in the hinge block by screw two, is set on rear side of the blade root compact heap
There are the upper and lower two root imitation profiles adaptable with the root shape of the interior arc shaped surface.
The blade tip compact heap can fore-aft travel be mounted in the hinge block, the rear side of the blade tip compact heap is equipped with
The upper and lower two bizet imitation profiles adaptable with the corona shape of the interior arc shaped surface, be also equipped in the hinge block for
The locking member of the blade tip compact heap is pushed afterwards.
It is provided with mounting groove up and down on the trailing flank of the hinge block, is provided on leading flank and is connected to the mounting groove
Threaded hole, be equipped with lock-screw in the threaded hole, the blade tip compact heap clearance fit is mounted in the mounting groove,
The long hole extended along the longitudinal direction is also provided on the blade tip compact heap, horizontal pin shaft is arranged in the long hole and its both ends is solid
Surely it is assemblied in the hinge block, the lock-screw acts against on the front end face of the blade tip compact heap and can push institute backward
State blade tip compact heap.
The avoid holes of the integral shroud boss for avoiding the precision forged blade are also provided on the leading flank of the positioning seat.
The beneficial effects of the present invention are:
Special fixture of the invention, profiling positioning surface on positioning seat can displacement freedom, intake and exhaust to direction is carried on the back in blade
The rotary freedom and axial-rotation freedom degree in direction are positioned, and blade root locating piece and blade tip locating piece can be to blade intake and exhaust
It is positioned to displacement freedom and radial rotary freedom degree, axially position pin can determine blade axial direction displacement freedom
Position compresses blade by blade root compact heap and blade tip compact heap profiling after blade is properly positioned, final to realize to precision forged blade
Six point location of profiling, after can making blade clamping, clamping state remains reliable and stable in process, solves Yin Ye
The technical problem that positioning difficulty is big, positioning accuracy is poor caused by piece blade profile is complicated, without throwing repair gas edge profile by hand again,
Directly can be by leading edge contour machining in place by Milling Machining, this fixture one after qualification, stable in batches can add after debugging
Work do not need to be repeatedly detected-throw to repair, and significant increase processing efficiency shortens the process-cycle, and product quality consistency is good, especially
For the blade that leading edge profile tolerance is tighter, its product qualification rate and stability can be greatly promoted.
Detailed description of the invention
Fig. 1 is main view of the invention；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the right view of Fig. 1；
Fig. 4 is the cross-sectional view of the line A-A along Fig. 2；
Fig. 5 is the mounting structure schematic diagram of positioning seat and bottom plate；
Fig. 6 is the mounting structure schematic diagram of hinge seat, hinge block and bottom plate；
Fig. 7 is the overall structure diagram of precision forged blade.
Appended drawing reference: 1- precision forged blade；2- convex profile；3- is vented side；4- listrium face；Arc shaped surface in 5-；6- leading edge；
7- integral shroud boss；11- bottom plate；12- positioning seat；13- hinge seat；14- profiling positioning surface；15- blade root locating piece；16- blade tip is fixed
Position block；17- axially position pin；The vertical pin shaft of 18-；19- hinge block；20- blade root compact heap；21- blade tip compact heap；22- exhaust
Side positioning surface；23- rectangular channel；24- recessing groove；25- fulcrum step screw；26- quick change washer；27- notch；28- screw one；
29- spheric washer；30- taper faced washer；31- butterfly spring washer；32- screw two；The root 33- imitation profile；34- bizet profiling
Face；36- lock-screw；37- long hole；38- horizontal pin shaft；39- avoid holes；40- hexagon socket cap head screw.
Specific embodiment
See Fig. 1 to Fig. 7, a kind of special fixture of precision forged blade leading edge contour machining of the invention comprising bottom plate 11
And positioning seat 12 and hinge seat 13 on bottom plate 11, the front side of positioning seat 12 are fixedly mounted on by screw and positioning pin respectively
Face right end is equipped with the profiling positioning surface 14 adaptable with the convex profile 2 of precision forged blade 1, and left side is provided with for avoiding precision forged blade
The avoid holes 39 of 1 integral shroud boss 7, be located on positioning seat 12 14 lower section of profiling positioning surface be fixedly installed with respectively be used to support it is fixed
Blade root locating piece 15 of the exhaust of position precision forged blade 1 in 3 roots and 3 bizets when being used to support the exhaust for positioning precision forged blade 1
Blade tip locating piece 16, blade root locating piece 15 and blade tip locating piece 16 can be fixed on positioning by hexagon socket cap head screw 17 respectively
On seat 12, the installation site and distance between the two of blade root locating piece 15 and blade tip locating piece 16 are set according to actual product demand
Meter；The axially position pin 17 in the listrium face 4 for positioning precision forged blade 1 is fixedly installed on the right side of positioning seat 12；Hinge
Seat 13 is located on front side of positioning seat 12, is rotatably equipped with hinge block 19 by vertical pin shaft 18 on hinge seat 13, divides in hinge block 19
Blade root compact heap 20 and blade tip compact heap 21 are not installed, hinge block 19 is rotatable and is fixed on positioning seat 12, and blade root pressure
Tight block 20 and 21 face profiling positioning surface 14 of blade tip compact heap and respectively profiling compress the root of the interior arc shaped surface 5 of precision forged blade 1
And bizet, the installation site and distance between the two of blade root compact heap 20 and blade tip compact heap 21 are also according to actual product demand
Design.
See Fig. 2, Fig. 3 and Fig. 5, the top surface of blade root locating piece 15 and blade tip locating piece 16 is exhaust side positioning surface 22, exhaust
Side positioning surface 22 is inclined surface, the section of the tilt angle and the precision forged blade 1 of respective corresponding position of two exhaust side positioning surfaces 22
Angle is adapted, and makes exhaust 3 point contacts in the exhaust of positioning surface 22 and precision forged blade 1.By making blade root locating piece and blade tip
The exhaust side of locating piece and precision forged blade carries out point contact, and the positioning for being also vented side can be made more accurate and stablized.
See Fig. 1, Fig. 2, Fig. 4 and Fig. 6, the rectangular channel 23 that front and back penetrates through, vertical pin shaft are provided on the left side of hinge seat 13
18 are fixed in rectangular channel 23, and the right end cooperation insertion rectangular channel 23 of hinge block 19 is simultaneously rotatablely connected with vertical pin shaft 18, thus
Hinge block 19 can rotate backward close to positioning seat 12 or rotate remotely located seat 12 forward, before being provided on the left side of hinge block 19
The recessing groove 24 penetrated through afterwards, the right side that recessing groove 24 is located on the leading flank of hinge block 19 are connected with fulcrum step screw 25,
26 notch 27 of quick change washer is directed downwardly to block recessing groove 24 and its right end and fulcrum step screw 25 are rotatablely connected；Positioning seat 12
Leading flank on correspond to recessing groove 24 and be provided with threaded hole one, the socket cap of screw 1 and screw 1 is equipped in threaded hole one
It may extend to 24 front side of recessing groove, be successively set with spheric washer 29, taper faced washer 30 and butterfly from front to back on screw 1
Spring washer 31, the notch 27 of quick change washer 26 rotatably entangles screw 1 and quick change washer 26 is clamped in butterfly spring washer
Between 31 and hinge block 19.It is designed in this way, after hinge block rotate in place, screw one can tentatively be screwed in threaded hole one,
Then screw one is entangled into the rotation of quick change washer, finally again locks screw one, due to being provided with spheric washer and taper faced washer,
Even if hinge block is not parallel with positioning seat, spheric washer and taper faced washer also can adaptive angle, guarantee hinge block and positioning seats
Between stable connection it is reliable, butterfly spring washer can play the role of stretching screw one, further increase in process
Structural stability.
See that Fig. 3, Fig. 4 and Fig. 6, blade root compact heap 20 are fixedly mounted in hinge block 19 by screw 2 32, blade root compresses
The rear side of block 20 is equipped with the upper and lower two root imitation profiles 33 adaptable with the root shape of interior arc shaped surface 5；Blade tip compact heap 21
Can fore-aft travel be mounted in hinge block 19, the rear side of blade tip compact heap 21 is equipped with the bizet of upper and lower two with interior arc shaped surface 5
Shape adaptable bizet imitation profile 34 is also equipped with the locking member for pushing blade tip compact heap 21 backward in hinge block 19.
Root imitation profile and bizet imitation profile are respectively provided with two, and compression effect can be made more preferable, can further really by adjusting locking member
It protects blade tip compact heap and effectively compresses interior arc shaped surface.
See Fig. 4 and Fig. 6, in the present embodiment, be provided with mounting groove up and down on the trailing flank of hinge block 19, on leading flank
It is provided with the threaded hole two being connected to mounting groove, lock-screw 36,21 clearance fit of blade tip compact heap peace are equipped in threaded hole two
In mounting groove, the long hole 37 extended along the longitudinal direction is also provided on blade tip compact heap 21, horizontal pin shaft 38 is arranged in long hole
In 37 and its both ends fixing assembling is in hinge block 19, and lock-screw 36 acts against on the front end face of blade tip compact heap 21 and can be to
Pusher movable vane point compact heap 21.To rotate lock-screw, blade tip compact heap can be pushed to compress blade, structure is simple, adjusts
It is convenient.
The lower process using present clip clamping blade is detailed below:
1) the exhaust side 3 of precision forged blade 1 is contacted into blade root locating piece 15 and blade tip locating piece 16, and keeps the contact of convex profile 2 fixed
Profiling positioning surface 14 on the seat 12 of position；
2) the listrium position of axially adjustable precision forged blade 1 is bonded listrium face 4 with axially position pin 17；
3) the positioning fit-state for further confirming that convex profile 2 and being vented side 3；
4) rotary gemel block 19 contacts blade root compact heap 20 and blade tip compact heap 21 and is bonded the interior arc shaped surface of precision forged blade 1
5, screw 1 is screwed in, rotary quick change washer 26 entangles screw 1, further one 28 fixed blade position of lock-screw；
5) it screws in lock-screw 36, it is made to fix blade tip compact heap 21, realize that auxiliary compresses, complete clamping workpiece, i.e., it is processable
Leading edge 6.
Claims (7)
1. a kind of special fixture of precision forged blade leading edge contour machining, it is characterised in that: it includes bottom plate and fixes respectively
The positioning seat and hinge seat being mounted on the bottom plate, the leading flank right end of the positioning seat are equipped with the back camber with precision forged blade
The adaptable profiling positioning surface in face, is located to be fixedly installed with respectively below the profiling positioning surface on the positioning seat and is used to support
Blade root locating piece of the exhaust of the precision forged blade in root is positioned to be preced with when being used to support the exhaust for positioning the precision forged blade
The blade tip locating piece in portion is fixedly installed with the axis in the listrium face for positioning the precision forged blade on the right side of the positioning seat
To positioning pin；The hinge seat is located on front side of the positioning seat, is rotatably equipped with hinge by vertical pin shaft on the hinge seat
Block is separately installed with blade root compact heap and blade tip compact heap in the hinge block, and the hinge block is rotatable and is fixed on described
On positioning seat, and described in profiling positioning surface described in the blade root compact heap and the blade tip compact heap face and difference profiling compression
The root of the interior arc shaped surface of precision forged blade and bizet.
2. a kind of special fixture of precision forged blade leading edge contour machining according to claim 1, it is characterised in that: described
The top surface of blade root locating piece and the blade tip locating piece be exhaust side positioning surface, the exhaust side positioning surface be inclined surface, two
The section angle of the precision forged blade of the tilt angle and respective corresponding position of the exhaust side positioning surface is adapted, and makes the row
Gas side positioning surface is contacted with the exhaust edge point of the precision forged blade.
3. a kind of special fixture of precision forged blade leading edge contour machining according to claim 1 or 2, it is characterised in that:
The rectangular channel that front and back penetrates through is provided on the left side of the hinge seat, the vertical pin shaft is fixed in the rectangular channel, described
The right end cooperation of hinge block is inserted into the rectangular channel and is rotatablely connected with the vertical pin shaft, opens on the left side of the hinge block
There is the recessing groove of front and back perforation, is rotatably equipped with quick change washer, the notch of the quick change washer on the leading flank of the hinge block
The recessing groove is blocked downward and rotatably；Screw one passes through the recessing groove and Screw assembly in the positioning seat from front to back
On, spheric washer, taper faced washer and butterfly spring washer, the quick change washer are successively set on the screw one from front to back
Notch rotatably entangle the screw one and the quick change washer be clamped in the butterfly spring washer and the hinge block it
Between.
4. a kind of special fixture of precision forged blade leading edge contour machining according to claim 1 or 2, it is characterised in that:
The blade root compact heap is fixedly mounted in the hinge block by screw two, and the rear side of the blade root compact heap is equipped with upper and lower two
A root imitation profile adaptable with the root shape of the interior arc shaped surface.
5. a kind of special fixture of precision forged blade leading edge contour machining according to claim 1 or 2, it is characterised in that:
The blade tip compact heap can fore-aft travel be mounted in the hinge block, the rear side of the blade tip compact heap is equipped with upper and lower two
The adaptable bizet imitation profile with the corona shape of the interior arc shaped surface is also equipped with for pushing institute backward in the hinge block
State the locking member of blade tip compact heap.
6. a kind of special fixture of precision forged blade leading edge contour machining according to claim 5, it is characterised in that: described
It is provided with mounting groove up and down on the trailing flank of hinge block, the threaded hole being connected to the mounting groove, institute are provided on leading flank
It states and is equipped with lock-screw in threaded hole, the blade tip compact heap clearance fit is mounted in the mounting groove, the blade tip pressure
The long hole extended along the longitudinal direction is also provided on tight block, horizontal pin shaft is arranged in the long hole and its both ends fixing assembling is in institute
It states in hinge block, the lock-screw acts against on the front end face of the blade tip compact heap and the blade tip can be pushed to compress backward
Block.
7. a kind of special fixture of precision forged blade leading edge contour machining according to claim 1 or 2, it is characterised in that:
The avoid holes of the integral shroud boss for avoiding the precision forged blade are also provided on the leading flank of the positioning seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620596.8A CN110238776A (en) | 2019-07-10 | 2019-07-10 | The special fixture of precision forged blade leading edge contour machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620596.8A CN110238776A (en) | 2019-07-10 | 2019-07-10 | The special fixture of precision forged blade leading edge contour machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110238776A true CN110238776A (en) | 2019-09-17 |
Family
ID=67891723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910620596.8A Pending CN110238776A (en) | 2019-07-10 | 2019-07-10 | The special fixture of precision forged blade leading edge contour machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110238776A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523846A (en) * | 2020-09-14 | 2021-10-22 | 无锡透平叶片有限公司 | Blade root milling clamp for small and medium-sized combustion engine turbine blades |
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| GB0806155D0 (en) * | 2008-04-04 | 2008-05-14 | Heller Machine Tools Ltd | A holdign device |
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| CN102615534A (en) * | 2012-04-10 | 2012-08-01 | 西北工业大学 | Hydraulic fixture used for machining precision forging blade tenon root |
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| CN206263658U (en) * | 2016-12-09 | 2017-06-20 | 无锡航亚科技股份有限公司 | The special fixture on steam discharge side is entered in a kind of finish forge blade milling |
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| CN206855045U (en) * | 2017-05-19 | 2018-01-09 | 昂拓科技（苏州）有限公司 | Aerial blade is accurately positioned stationary fixture |
| CN107553173A (en) * | 2017-10-20 | 2018-01-09 | 西北工业大学 | A kind of special fixture for the processing of blade of aviation engine tenon root |
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| CN108723820A (en) * | 2018-05-30 | 2018-11-02 | 中国航发动力股份有限公司 | A kind of blade profile clamping device for aero-engine precision forged blade mechanical processing |
| CN208322784U (en) * | 2018-06-26 | 2019-01-04 | 哈尔滨汽轮机厂有限责任公司 | It is a kind of for processing the fixture of turbine blade root leading edge |
| CN210452430U (en) * | 2019-07-10 | 2020-05-05 | 无锡航亚科技股份有限公司 | Special fixture for contour machining of air inlet edge of precision forging blade |
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2019
- 2019-07-10 CN CN201910620596.8A patent/CN110238776A/en active Pending
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| DE102007061542A1 (en) * | 2007-12-20 | 2009-06-25 | Werkzeugmaschinenfabrik Adolf Waldrich Coburg Gmbh & Co. Kg | Kaplan turbine blade machining method for e.g. 3-4 axis gantry machine, involves machining blade pivot and blade hub in one machining step, and accommodating and centering blade at blade pivot in subsequent machining steps |
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| CN103878608A (en) * | 2014-01-30 | 2014-06-25 | 无锡透平叶片有限公司 | Clamp used for processing aviation thin-wall blade pitch |
| CN206263658U (en) * | 2016-12-09 | 2017-06-20 | 无锡航亚科技股份有限公司 | The special fixture on steam discharge side is entered in a kind of finish forge blade milling |
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| CN206855045U (en) * | 2017-05-19 | 2018-01-09 | 昂拓科技（苏州）有限公司 | Aerial blade is accurately positioned stationary fixture |
| CN107553173A (en) * | 2017-10-20 | 2018-01-09 | 西北工业大学 | A kind of special fixture for the processing of blade of aviation engine tenon root |
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| CN108723820A (en) * | 2018-05-30 | 2018-11-02 | 中国航发动力股份有限公司 | A kind of blade profile clamping device for aero-engine precision forged blade mechanical processing |
| CN208322784U (en) * | 2018-06-26 | 2019-01-04 | 哈尔滨汽轮机厂有限责任公司 | It is a kind of for processing the fixture of turbine blade root leading edge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523846A (en) * | 2020-09-14 | 2021-10-22 | 无锡透平叶片有限公司 | Blade root milling clamp for small and medium-sized combustion engine turbine blades |
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