CN104476121B - A kind of thin-walled dual channel structure welding module processing method and employing fixture - Google Patents
A kind of thin-walled dual channel structure welding module processing method and employing fixture Download PDFInfo
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- CN104476121B CN104476121B CN201410628219.6A CN201410628219A CN104476121B CN 104476121 B CN104476121 B CN 104476121B CN 201410628219 A CN201410628219 A CN 201410628219A CN 104476121 B CN104476121 B CN 104476121B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Plasma & Fusion (AREA)
- Manufacture Of Motors, Generators (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of thin-walled dual channel structure welding module processing method and employing fixture, belong to welding processing technical field, particularly a kind of thin-walled dual channel structure welding module processing method and employing fixture.The present invention takes two-sided argon arc welding to improve weld strength, utilizes fixture rigid limit to control welding deformation amount, improves dual channel structure welding assembly crudy, breaks through its crackle and falls block technical bottleneck, improves batch product processing stability.Processing method of the present invention, comprises the steps: that welding forms inner flow passage weld assembly；Welding forms outer flow passage weld assembly；Open inside and outside runner type hole；Bevel；Fixture is installed thin-walled dual channel structure welding assembly；Two-sided argon arc welding；Non-Destructive Testing；Vacuum heat.Described fixture, including base, straightener(stator) blade locating piece, column, support bar, pressing plate, expansion block, push rod, inner flow passage locating piece, outer flow passage locating piece, gland and first, second nut.
Description
Technical field
The invention belongs to welding processing technical field, particularly a kind of thin-walled dual channel structure welding module processing method and employing folder
Tool.
Background technology
One of combustion engine dress warship outstanding feature having become surface ship modernization, and be used widely in naval.Certain is carrier-borne
In combustion engine durability test run examination, rear housing runner elements occurs that crackle falls a block fault difficult problem, it would be highly desirable to control to solve, and this fault is predominantly
Fatigue fracture, fatigue originates from inside 24 straightener(stator) blades of single-sided welding the sharp corner caused by non-seam at work by comprehensive external force
Effect produces stress and concentrates, and induces weld fatigue crackle, the uncontrollable fatigue crack of existing welding procedure and meet carrier-borne combustion engine
Reliability and long life requirement.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of thin-walled dual channel structure welding module processing method and uses folder
Tool, takes two-sided argon arc welding to improve angle welding intensity, utilizes fixture rigid limit to control welding deformation amount, improves dual channel
Structure welding assembly crudy, breaks through its crackle and falls block technical bottleneck, improves batch product processing stability.
To achieve these goals, the present invention adopts the following technical scheme that a kind of thin-walled dual channel structure welding module processing method,
Comprise the steps:
Step one: welding formation inner flow passage weld assembly:
Before limit, inner flow passage cylinder and inner flow passage being installed after inner flow passage, limit is installed and is welded into inner flow passage weld assembly according to drawing requirement；
Step 2: welding formation outer flow passage weld assembly:
It is welded into outer flow passage weld assembly according to drawing requirement, outer flow passage cylinder straight by installing limit before outer flow passage cylinder and outer flow passage
Amount of contraction is reserved in footpath；
Step 3: open inside and outside runner type hole:
Inner flow passage cylinder cuts inner flow passage type hole, cutting outflow channel type hole, inner flow passage type hole and rectification on runner cylinder outside
The installation site one_to_one corresponding of blade, outflow channel type hole and the installation site one_to_one corresponding of straightener(stator) blade；
Step 4: bevel:
Outward flange place to be welded bevel in inside and outside runner type hole；
Step 5: installation thin-walled dual channel structure welding assembly on fixture:
Being fixed on fixture by inside and outside runner weld assembly, fixture is the most internal, axial, the footpath of outer flow passage weld assembly
To positioning, then straightener(stator) blade is placed on inside and outside runner cylinder through inside and outside runner type hole, makes inside and outside runner
The position of weld assembly and straightener(stator) blade meets drawing requirement；
Step 6: two-sided argon arc welding:
By argon arc welding by the inner of each straightener(stator) blade respectively inside and outside sidewall with the inner flow passage cylinder of inner flow passage weld assembly weld
Be connected together, by argon arc welding by the outer end of straightener(stator) blade respectively with the inside and outside sidewall of the outer flow passage cylinder of outer flow passage weld assembly
Weld together, form thin-walled dual channel structure welding assembly；
Welding parameter: solder wire material: HGH536, gage of wire: 1.0～1.6mm；Welding gun tungsten electrode diameter: 1.5～2mm；Argon gas
Flow: 8～10L/min；Electric current: 70～130A；
Step 7: Non-Destructive Testing:
Thin-walled dual channel structure welding assembly is pulled down from fixture, and every weld seam is carried out fluoroscopy；
Step 8: vacuum heat:
Thin-walled dual channel structure welding assembly is loaded in vacuum drying oven, rises to 970 DEG C ± 10 DEG C from the temperature less than 150 DEG C, insulation
Time 30～40min, it is cooled to less than 80 DEG C and comes out of the stove.
Described fixture, fixed including base, straightener(stator) blade locating piece, column, support bar, pressing plate, expansion block, push rod, inner flow passage
Position block, outer flow passage locating piece, gland and first, second nut, be fixed with column at the edge of base, in the bottom of column,
Be positioned on base and be fixed with straightener(stator) blade locating piece, on base, the inner side that is positioned at column be provided with pressing plate, pressing plate is by supporting
Bar and the second nut are fixed on base, are provided above gland at base, and the column above gland is provided with the first spiral shell
Mother, is fixed with inner flow passage locating piece and outer flow passage locating piece in the bottom of gland, and inner flow passage locating piece is positioned at outer flow passage locating piece
Inner side, is provided with expansion block between inner flow passage locating piece and base, and expansion block is fixing with horizontally disposed push rod to be connected.
On described base, it is positioned at the lower section of inner flow passage locating piece and is provided with the first seam, the first seam and inner flow passage weld assembly
Inner flow passage after install limit match, the outer end of described pressing plate is arranged on the top of the first seam.
On described base, it is positioned at the lower section of outer flow passage locating piece and is provided with the second seam, the second seam and outer flow passage weld assembly
The bottom of outer flow passage cylinder match.
Being provided with several gland type holes on described gland, gland type hole is between inside and outside runner locating piece.
Beneficial effects of the present invention:
The present invention utilizes the rigid limit of fixture to control the axially and radially deformation of thin-walled dual channel structure welding assembly；By excellent
Changing welding parameter makes two-weld process reach to strengthen the root penetration purpose of angle welding；Can not only process and meet design drawing
The high-quality thin-walled dual channel structure welding assembly required, and weld strength is high, effectively eliminate welding deformation and stress, solves
Assemble the difficult problem that misplaces, breakthrough crackle falls block technical bottleneck, improves batch product processing stability, meets long-life use requirement, every year
Fund 2,370,000 yuan can be saved.
Accompanying drawing explanation
Fig. 1 is the structural representation of the inside and outside runner first half welding sub-assembly of thin-walled dual channel structure welding assembly；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the right view of Fig. 1；
Fig. 4 is that the present invention uses fixture to weld the structural representation after sub-assembly is installed with straightener(stator) blade and inside and outside runner first half；
Fig. 5 is the structural representation that the present invention uses the gland of fixture；
In figure, 1--inner flow passage weld assembly, limit is installed after 101--inner flow passage, 102--inner flow passage cylinder, before 103--inner flow passage
Installation limit, 2--outer flow passage weld assembly, 201--outer flow passage cylinder, installation limit before 202--outer flow passage, 3--straightener(stator) blade, 4
First weld seam, 5 second weld seams, 6 the 3rd weld seams, 7 the 4th weld seams, 8--inner flow passage type hole, 9--outflows channel type hole, 10--
Base, 11--straightener(stator) blade locating piece, 12--column, 13 first nuts, 14--support bar, 15--pressing plate, 16 second
Nut, 17--expansion block, 18--push rod, 19--spanner, 20--inner flow passage locating piece, 21--outer flow passage locating piece, 22--gland,
23--sunk screw, 24--gland type hole, 25 first seams, 26 second seams.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, thin-walled dual channel structure welding modular construction is complicated, by the different inside and outside runner weld assembly of thickness and
Straightener(stator) blade 3 forms, and is wherein equivalent to the turbine rear casing of sheet metal structural, has gathered Laser Processing, welding, Vehicle Processing, boring
Processing and Non-Destructive Testing technique are in one, and its inside and outside runner weld assembly welds the angle welding up to 96 formed with straightener(stator) blade,
Extreme difficulty is brought to the stability of integral solder and machining；Thin-walled dual channel structure welding assembly uses high temperature alloy GH536
Material, uses existing technique to produce contraction distortion in weld zone, and distortional stress is relatively big, uses process and the fixture of the present invention
Effectively eliminate welding stress, control welding deformation amount.
As shown in Fig. 1～5, a kind of thin-walled dual channel structure welding module processing method, comprise the steps:
Step one: welding formation inner flow passage weld assembly 1:
Limit 103 and inner flow passage cylinder 102 will be installed before limit 101, inner flow passage being installed after inner flow passage and be welded into according to drawing requirement interior
Runner weld assembly 1, install after limit 103 and the weld of inner flow passage cylinder 102, inner flow passage are installed before inner flow passage limit 101 with
The weld thickness of inner flow passage cylinder 102 is 2mm, and forms two annular argon arc weld seams at weld；
Step 2: welding formation outer flow passage weld assembly 2:
It is welded into outer flow passage weld assembly 2 according to drawing requirement by installing limit 202 before outer flow passage cylinder 201 and outer flow passage, and
Weld forms an annular argon arc weld seam；The weld thickness installing limit 202 and outer flow passage cylinder 201 before outer flow passage is 2mm,
The diameter of outer flow passage cylinder 201 reserves the amount of contraction of 3～4mm, and outer flow passage cylinder 201 diameter dimension after making welding shrink meets
Drawing requirement；
Step 3: open inside and outside runner type hole:
By 24 inner flow passage type holes 8 of laser cutting on the inner flow passage cylinder 102 of inner flow passage weld assembly 1, at outer flow passage
By laser cutting 24 outflow runner type hole 9 on the outer flow passage cylinder 201 of weld assembly 2；24 inner flow passage type holes 8 with
The installation site one_to_one corresponding of 24 straightener(stator) blades 3,24 outflow channel type holes 9 and the installation site one of 24 straightener(stator) blades 3
One is corresponding, prepares for installing straightener(stator) blade 3；
Step 4: bevel:
1mm × 45 ° groove is increased at the outward flange place to be welded in inside and outside runner type hole；
Step 5: installation thin-walled dual channel structure welding assembly on fixture:
Inside and outside runner weld assembly is placed on the base 10 of fixture, with interior in inside and outside runner weld assembly top cover
The gland 22 of runner locating piece 20 and outer flow passage locating piece 21, installs limit 101 and base after making the inner flow passage of inner flow passage weld assembly 1
First seam 25 of 10 matches, and match with the second seam 26 in the bottom of the outer flow passage cylinder 201 of outer flow passage weld assembly 2, interior
Limit 103 is installed before the inner flow passage of runner weld assembly 1 and is stuck in the outside of inner flow passage locating piece 20, the outer flow passage of outer flow passage weld assembly 2
Front installation limit 202 is stuck in the outside of outer flow passage locating piece 21, installs and press pressure on limit 101 after the inner flow passage of inner flow passage weld assembly 1
Plate 15, screws in first, second nut, internally, axially the positioning of outer flow passage weld assembly；
Again straightener(stator) blade 3 is placed on inside and outside runner cylinder through inside and outside runner type hole, is positioned at straightener(stator) blade locating piece
The top of 11, contacts the interior profile of expansion block 18 with the inner flow passage cylinder 102 of inner flow passage weld assembly 1, and avoids rectification
The inner of blade 3, releases push rod 18 laterally, and push rod 18 supports the interior of the inner flow passage cylinder 102 of inner flow passage weld assembly 1
Profile, the radial direction of internal runner cylinder 102 positions；
Described fixture, including base 10, straightener(stator) blade locating piece 11, column 12, support bar 14, pressing plate 15, expansion block 17,
Push rod 18, inner flow passage locating piece 20, outer flow passage locating piece 21, gland 22 and first, second nut, on the limit of base 10
Edge is fixed with column 12, in the bottom of column 12, is positioned on base 10 and is fixed with straightener(stator) blade locating piece 11, is used for positioning whole
Stream blade 3；On base 10, being positioned at the inner side of column 12 and be provided with pressing plate 15, pressing plate 15 is by support bar 14 and second
Nut 16 is fixed on base 10, and limit 101 installed after the inner flow passage fixing inner flow passage weld assembly 1 by pressing plate 15, the end of at
Seat 10 be provided above gland 22, the column 12 above gland 22 is provided with the first nut 13, at the end of gland 22
Portion is provided with inner flow passage locating piece 20 and outer flow passage locating piece 21, inner flow passage locating piece 20 and outer flow passage locating piece 21 and all passes through
Sunk screw 23 is fixed on the bottom of gland 22, and inner flow passage locating piece 20 is positioned at the inner side of outer flow passage locating piece 21, at interior stream
Being provided with expansion block 17 between road locating piece 20 and base 10, during use, expansion block 17 is fixing with horizontally disposed push rod 18 is connected,
Expansion block 17 is for supporting the interior profile of the inner flow passage cylinder 102 of inner flow passage weld assembly 1, and avoids 24 straightener(stator) blades 3
The inner, the deformation to welding process is played rigid limit effect, is provided with spanner 19 on push rod 18.
On described base 10, the lower section that is positioned at inner flow passage locating piece 20 be provided with the first seam 25, the first seam 25 and inner flow passage
Installing limit 101 after the inner flow passage of weld assembly 1 to match, the outer end of described pressing plate 15 is arranged on the top of the first seam 25, interior stream
Installing the top on limit 101 behind road, pressing plate 15 and the first seam 25 install the axle on limit 101 after the inner flow passage of inner flow passage weld assembly 1
To, radially location.
On described base 10, the lower section that is positioned at outer flow passage locating piece 21 be provided with the second seam 26, the second seam 26 and outer flow passage
Matching in the bottom of the outer flow passage cylinder 201 of weld assembly 2, the second seam 26 is for the radial direction location of outer flow passage cylinder 201.
Being provided with several equally distributed gland type holes 25 on described gland 22, gland type hole 25 is positioned at inside and outside runner location
Between block.
Step 6: two-sided argon arc welding:
Welding gun uses argon arc welding by the inner side of the inner of 24 straightener(stator) blades 3 Yu the inner flow passage cylinder 102 of inner flow passage weld assembly 1
Wall welds together, and forms the second weld seam 5；Welding gun uses argon arc welding that with outer flow passage, the outer end of 24 straightener(stator) blades 3 is welded group
The lateral wall of the outer flow passage cylinder 201 of part 2 welds together, and forms the first weld seam 4；Welding gun uses argon through gland type hole 25
The lateral wall of the inner of 24 straightener(stator) blades 3 with the inner flow passage cylinder 102 of inner flow passage weld assembly 1 is welded together by arc-welding,
Form the 4th weld seam 7；Welding gun uses argon arc welding to be welded with outer flow passage the outer end of 24 straightener(stator) blades 3 through gland type hole 25
The madial wall of the outer flow passage cylinder 201 of assembly 2 welds together, formed the 3rd weld seam 6, this by inside and outside runner cylinder,
Lateral wall is all two-sided argon arc welding with straightener(stator) blade 3 by the method that argon arc welding welds together, by two-sided argon arc welding shape
Become thin-walled dual channel structure welding assembly, strengthen the root penetration of first, second, third, fourth weld seam, it is ensured that weld seam makes
By intensity, simultaneously by the rigid limit of fixture, control thin-walled dual channel structure welding assembly the most axially and radially
Deformation；
Welding parameter: solder wire material: HGH536, gage of wire: 1.0～1.6mm；Welding gun tungsten electrode diameter: 1.5～2mm；Argon gas
Flow: 8～10L/min；Electric current: 70～130A；
Step 7: Non-Destructive Testing:
Thin-walled dual channel structure welding assembly is pulled down from fixture, and to first～the 4th weld seam carry out fluoroscopy, it is ensured that welding
Quality, it is to avoid crackle produces；
Step 8: vacuum heat:
Thin-walled dual channel structure welding assembly is loaded in vacuum drying oven, is warming up to 970 DEG C ± 10 DEG C from the temperature less than 150 DEG C, protect
The temperature time 30～40min, then applying argon gas 0.2～0.4MPa is cooled to less than 80 DEG C and comes out of the stove, in order to eliminate welding stress, expires
Foot uses requirement.
Claims (5)
1. a thin-walled dual channel structure welding module processing method, it is characterised in that comprise the steps:
Step one: welding forms inner flow passage weld assembly
Before limit, inner flow passage cylinder and inner flow passage being installed after inner flow passage, limit is installed and is welded into inner flow passage weld assembly；
Step 2: welding forms outer flow passage weld assembly
Being welded into outer flow passage weld assembly by installing limit before outer flow passage cylinder and outer flow passage, the diameter of outer flow passage cylinder reserves amount of contraction；
Step 3: open inside and outside runner type hole
Inner flow passage cylinder cuts inner flow passage type hole, cutting outflow channel type hole, inner flow passage type hole and rectification on runner cylinder outside
The installation site one_to_one corresponding of blade, outflow channel type hole and the installation site one_to_one corresponding of straightener(stator) blade；
Step 4: bevel
Outward flange place to be welded bevel in inside and outside runner type hole；
Step 5: install thin-walled dual channel structure welding assembly on fixture
Being fixed on fixture by inside and outside runner weld assembly, fixture is the most internal, axial, the footpath of outer flow passage weld assembly
To positioning, then straightener(stator) blade is placed on inside and outside runner cylinder through inside and outside runner type hole, makes inside and outside runner
The position of weld assembly and straightener(stator) blade meets the requirements；
Step 6: two-sided argon arc welding
By argon arc welding by the inner of each straightener(stator) blade respectively inside and outside sidewall with the inner flow passage cylinder of inner flow passage weld assembly weld
Be connected together, by argon arc welding by the outer end of straightener(stator) blade respectively with the inside and outside sidewall of the outer flow passage cylinder of outer flow passage weld assembly
Weld together, form thin-walled dual channel structure welding assembly；
Welding parameter: solder wire material: HGH536, gage of wire: 1.0～1.6mm；Welding gun tungsten electrode diameter: 1.5～2mm；Argon
Throughput: 8～10L/min；Electric current: 70～130A；
Step 7: Non-Destructive Testing
Thin-walled dual channel structure welding assembly is pulled down from fixture, and every weld seam is carried out fluoroscopy；
Step 8: vacuum heat
Thin-walled dual channel structure welding assembly is loaded in vacuum drying oven, rises to 970 DEG C ± 10 DEG C from the temperature less than 150 DEG C, insulation
Time 30～40min, it is cooled to less than 80 DEG C and comes out of the stove.
2. the fixture that the thin-walled dual channel structure welding module processing method described in claim 1 uses, it is characterised in that described folder
Tool includes base, straightener(stator) blade locating piece, column, support bar, pressing plate, expansion block, push rod, inner flow passage locating piece, outer flow passage
Locating piece, gland and first, second nut, be fixed with column at the edge of base, in the bottom of column, is positioned on base admittedly
Surely have straightener(stator) blade locating piece, on base, the inner side that is positioned at column be provided with pressing plate, pressing plate passes through support bar and the second nut
It is fixed on base, is provided above gland at base, the column above gland is provided with the first nut, at gland
Bottom is fixed with inner flow passage locating piece and outer flow passage locating piece, and inner flow passage locating piece is positioned at the inner side of outer flow passage locating piece, at interior stream
Being provided with expansion block between road locating piece and base, expansion block is fixing with horizontally disposed push rod to be connected.
The fixture that thin-walled dual channel structure welding module processing method the most according to claim 2 uses, it is characterised in that
On described base, it is positioned at the lower section of inner flow passage locating piece and is provided with the first seam, the interior stream of the first seam and inner flow passage weld assembly
Installing limit behind road to match, the outer end of described pressing plate is arranged on the top of the first seam.
The fixture that thin-walled dual channel structure welding module processing method the most according to claim 2 uses, it is characterised in that
On described base, it is positioned at the lower section of outer flow passage locating piece and is provided with the second seam, the outflow of the second seam and outer flow passage weld assembly
Match in the bottom of road cylinder.
The fixture that thin-walled dual channel structure welding module processing method the most according to claim 2 uses, it is characterised in that
Being provided with several gland type holes on described gland, gland type hole is between inside and outside runner locating piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410628219.6A CN104476121B (en) | 2014-11-10 | 2014-11-10 | A kind of thin-walled dual channel structure welding module processing method and employing fixture |
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| CN201410628219.6A CN104476121B (en) | 2014-11-10 | 2014-11-10 | A kind of thin-walled dual channel structure welding module processing method and employing fixture |
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| CN104476121B true CN104476121B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105666010A (en) * | 2016-04-06 | 2016-06-15 | 中国南方航空工业(集团)有限公司 | Welding fixture for welding aero engine jet oil passage closure |
| CN107674959B (en) * | 2017-09-25 | 2019-04-16 | 哈尔滨汽轮机厂有限责任公司 | One kind being used for big blade heat treatment shaping tool |
| CN110814551B (en) * | 2019-12-18 | 2024-04-16 | 江南工业集团有限公司 | Multidirectional self-correction laser welding auxiliary device for thin-wall shell and application method |
| CN114932152B (en) * | 2022-04-06 | 2024-09-10 | 江阴市博汇机械成套设备有限公司 | Large-scale thin-wall runner body manufacturing tool and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2903725A1 (en) * | 1979-01-31 | 1980-08-21 | Wacker Chemie Gmbh | ANTI-FOAM AGENTS |
| FR2860741B1 (en) * | 2003-10-10 | 2007-04-13 | Snecma Moteurs | PROCESS FOR THE REPAIR OF METALLIC PARTS, ESPECIALLY TURBINE BLADES OF GAS TURBINE ENGINES |
| CN101879655B (en) * | 2009-05-07 | 2012-01-25 | 张家口市宣化布柯玛液压设备制造厂 | Welding production technology of diaphragm type energy accumulator |
| CN103962795A (en) * | 2013-01-28 | 2014-08-06 | 昆山华德宝通力扶梯设备有限公司 | Welding technology of lifting lug for offshore gas cylinder binding equipment |
| CN103551770B (en) * | 2013-11-18 | 2015-07-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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| CP01 | Change in the name or title of a patent holder |