CN107891372A - Needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means - Google Patents
Needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means Download PDFInfo
- Publication number
- CN107891372A CN107891372A CN201710970758.1A CN201710970758A CN107891372A CN 107891372 A CN107891372 A CN 107891372A CN 201710970758 A CN201710970758 A CN 201710970758A CN 107891372 A CN107891372 A CN 107891372A
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- CN
- China
- Prior art keywords
- needle
- valve body
- positioning sleeve
- valve
- grind
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/083—Deburring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
- B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
- B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface
Abstract
The invention discloses a kind of needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means, including：Positioning sleeve (3), cross liquid valve (1) and pin (2) three parts, positioning sleeve (3) is cylindrical shape, cross liquid valve (1) and be located at positioning sleeve (3) top and prominent positioning sleeve (3) top, needle-valve body top is embedded in positioning sleeve (3) bottom and docked with crossing liquid valve, pin (2) laterally penetrates positioning sleeve (3) and crosses liquid valve (1) and fix both, positioning sleeve (3) is cylindrical for fixing to clamp needle-valve body, crosses liquid valve (1) and is used to precisely guide abrasive flows to flow to.Abrasive flows are directed in needle-valve body high-pressure oil duct hole by the present invention, crush and grind is fully carried out to the hole wall in high-pressure oil duct hole, improves hole wall surface quality, the unfavorable factor for influenceing nozzle discharge coefficient is removed, reach predetermined processing flow value, be improved atomizer atomization.
Description
Technical field
The invention belongs to machining technology field, is related to a kind of needle-valve body oil hole and is connected with spray orifice abrasive material crush and grind
Device.
Background technology
Atomizer is one of important component in diesel fuel system, to the dynamic property of diesel engine, fuel economy, row
Put index and play material impact effect.Nozzle discharge coefficient be evaluate quality nozzle an important indicator, the size of the value
The spray characteristics of fuel oil are directly influenced, so as to produce material impact to diesel engine performance.Nozzle discharge coefficient is the reality of spray orifice
The ratio between border distributive value and preferable distributive value, it is to measure in the steady state.Flow resistance of the fuel oil in atomizer is reduced to be advantageous to carry
High atomization effect.Abrasive material crush and grind can effectively improve the discharge coefficient of spray orifice, therefore as one of needle-valve body process
Key process technology.
In terms of atomizer working mechanism：During work, hydraulic oil injects from needle-valve body oil hole, sprays to form combustion in spray orifice
Burn.Period, needle-valve persistently do reciprocating piston motion, and needle-valve is taken a seat by certain frequency, and hydraulic oil fills couple gap.It is if high
Cleannes are not in place in pressure oil hole, burr remnants or the processing coarse situation of hole wall be present, it may occur that three kinds of situations：First, high pressure
Oil takes microtriche thorn in couple gap to, causes needle-valve stuck；2nd, hydraulic oil by microtriche thorn take on sealing cone, needle-valve without
Method is taken a seat, and causes atomizer oil leak；3rd, hole wall is coarse causes fuel flow rate not smooth for processing, and flow resistance is big, nozzle discharge coefficient
Reduce.Engine over-emitting black exhaust, fuel injector carbon distribution and penalty can be all caused when these situations are serious, or even produces piston top quilt
The adverse consequences such as ablation, scuffing of cylinder bore and crankshaft wear tile kilning.
As shown in figure 1, in atomizer high-pressure oil duct hole and spray orifice, high-pressure oil duct holeSurface roughness requirements
Ra0.8.Injection diameter(0/-0.005) surface roughness requirements Ra0.8.
In process of production, needle-valve body oil holeProcessed using common driller, high-speed steel drill is machined directly to
Drawing requirement size.The process has the features such as productivity ratio is high, cutter loss is small, low to operator's processing skill set requirements, but
Processing metapore inside surface roughness can only achieve Ra3.2, and drawing requirement Ra0.8 can not meet, while microtriche thorn remains more, drilling
End and electrolysis oil groove junction can form knife edge.Sharp edge and residual burr useHairbrush manual cleanup, it is such a
Process randomness is strong, and cleaning effect is poor, can not solve Burr Problem.Jet orifice of needle valve processing is beaten using Swiss electric spark
Hole machine (model HP2-EDM).Electrical discharge machining spray orifice have without Machining Forces, spray orifice precision height, balancing gate pit's impulse- free robustness, not by
The advantages that material hardness limits, but galvano-cautery surface roughness does not reach drawing requirement Ra0.8, micropore and sealing cone after processing
Junction can form knife edge, and hydraulic oil is dammed；Carbon distribution and water quality knot trace are formed when in Yi Kong.Carbon distribution and water quality knot
The presence of trace can influence the accuracy of injection diameter and roundness measurement, to the true of later stage injector assembly fuel flow value test
Property, accuracy play harmful effect.
The technique for only carrying out fluid power grinding extrusion process for jet orifice of needle valve both at home and abroad at present, not for needle-valve body
High-pressure oil duct hole carries out the means of surface quality raising.
Extruding machine tooling spray orifice is ground using fluid power.Connecting element used in processing is fluid power grinding extruding lathe itself institute
The grasping system of configuration.Shown in Fig. 2 and Fig. 3, lathe connecting element structure is by the pressure head of piece number 1 and the base of piece number 2 and the rubber of piece number 3
Sealing gasket forms.The base of piece number 2 is fixed on workbench upper end by alignment pin, plays fixation；Pressure head is screwed with M5
At upper table center, pressuring action is played；The rubber gasket of piece number 3 is fixed in pressure head, is sealed.
Process principle：Needle-valve body is fitted into base, control panel input tonnage, process time, extrusion passes (mill
Expect total amount), work button is pressed, pressure head compresses needle-valve body according to instruction, and rubber gasket is brought into close contact with needle-valve body seal face.
Liquid abrasive material is injected at needle-valve body micropore from pressure head, using high pressure by aperture and conical surface junction knife edge grinding rounding,
Remove pore burr removing carbon distribution and knot trace.
Such a connecting element has following defect：
1. adaptability is low, the range of work is narrow：Fluid power abrasive material is only directed at jet orifice of needle valve by this kind of connecting element, to oil
Road hole does not work.In detecting at the scene, if oil hole cleannes are not in place, hole wall is coarse, microtriche thorn residual is more, will be to spray orifice
Discharge coefficient has a direct impact, and nozzle discharge coefficient should only have 0.65 by nozzle discharge coefficient at 0.8, actual measurement on request.
2. practicality is low, wear no resistance：Rubber gasket in the connecting element is critical seal part, belongs to elastic material
Material, hardness are relatively low.When lathe works, rubber gasket and needle-valve body seal face are brought into close contact, and pressure head acts on rubber seal
The pressure of pad is up to 10Mpa, and needle-valve body (hardness >=79HRA) the seal face annular groove sharp edge being on the one hand pressurized is to rubber gasket
Shear action is played, micro sharp edge shearing traces occur on sealing gasket；There is liquid abrasive material residual on another aspect rubber gasket,
Abrasive wear rubber gasket is serious.When seal face quality reduces, machine tool liquid abrasive material will be from connecting element and sealed end
Overflowed between face, the pressure for acting on spray orifice weakens, reduced in the liquid abrasive material flux unit time, machine tooling performance drop
It is low.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is：The accurate crush and grind of a kind of needle-valve body oil hole and spray orifice abrasive material is provided to connect
Connection device, rapid processing different structure size needle-valve body oil hole and injection hole surface quality are improved, improve nozzle discharge coefficient, it is full
The purpose of sufficient atomizer cleannes requirement, realizes and is fixed in closed chamber by part secure, protect other not need abrasive material to add
The position of work, and abrasive material can be guided to be flowed in the runner of oil hole.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of needle-valve body oil hole and connected with spray orifice abrasive material crush and grind
Device, it includes：Positioning sleeve 3, liquid valve 1 and the three parts of pin 2 are crossed, positioning sleeve 3 is cylindrical shape, crosses liquid valve 1 on positioning sleeve 3
Portion and the prominent top of positioning sleeve 3, the needle-valve body top insertion bottom of positioning sleeve 3 are simultaneously docked with crossing liquid valve, and pin 2 laterally penetrates fixed
Position covers 3 and crosses liquid valve 1 and fix both, and positioning sleeve 3 is cylindrical for fixing to clamp needle-valve body, crosses liquid valve 1 for precisely guiding
Abrasive flows flow to.
Wherein, described cross on liquid valve 1 offers oblique liquid pass hole, and liquid pass hole top is used to flow into the abrasive material on pressure head
Mouth alignment, bottom are used to align with the abrasive material circulation road on needle-valve body.
Wherein, the liquid valve 1 of crossing has Multiple Type, and the liquid pass hole angle of inclination for crossing liquid valve of different model and aperture are not
Together, it is corresponding with different model needle-valve body respectively.
Wherein, the liquid valve 1 of crossing coordinates with the gap of positioning sleeve 3.
Wherein, the material of positioning sleeve 3 is GCr15.
Wherein, it is described to cross the material selection low-alloy wear-resistant steel WEL-TEN AR360C of liquid valve 1, hardness HB >=235~401.
Wherein, the part end face depth of parallelism of liquid valve 1 of crossing is 0.01.
Wherein, the liquid valve 1 of crossing assembles the depth of parallelism 0.02 with positioning sleeve 2.
Wherein, described cross between liquid valve 1 and positioning sleeve 3 passes through diameterPin 2 connect.
(3) beneficial effect
The accurate crush and grind attachment means of needle-valve body oil hole and spray orifice abrasive material that above-mentioned technical proposal is provided, have with
Lower effect：
1. strong adaptability, the range of work expands, and improves jet orifice of needle valve discharge coefficient：Former connecting element is only sprayed to needle-valve body
Hole acts on, and abrasive flows are directed in needle-valve body high-pressure oil duct hole, the hole wall in high-pressure oil duct hole is fully extruded by the present apparatus
Grinding, hole wall surface quality is improved, the unfavorable factor for influenceing nozzle discharge coefficient is removed, reached predetermined processing flow value, make
Atomizer atomization is improved.
2. it is practical, squeeze to grind and realize precise positioning, adapt to multi-product processing request：Liquid valve of crossing in the present invention is one group
Part, the needle-valve body of different model cross liquid valve using different structure.All liquid valve upper surfaces of crossing are smooth surfaces, surface
It roughness Ra 0.2, the depth of parallelism 0.01, can be brought into close contact with rubber gasket under high pressure, be not in shearing force and abrasive material mill
Damage, effectively prevent abrasive material from overflowing, operating pressure reduces.Dowel hole, the alignment pin of grinding hole and corresponding needle-valve body of lower surface
Hole, the engagement of oil hole position height.During clamping, alignment pin is fixedly connected liquid valve is crossed with needle-valve body, prevents needle-valve body from side occurs
Skew, liquid abrasive material are accurately flowed into high-pressure oil duct hole, farthest embody machine tooling ability.
Brief description of the drawings
Fig. 1 is needle-valve body high-pressure oil duct hole system sketch in the prior art；
Fig. 2 is connecting element structure diagram in the prior art；
Fig. 3 is abrasive material flow export enlarged drawing in the prior art；
Fig. 4 is attachment means structure diagram of the embodiment of the present invention；
Fig. 5 is abrasive material flow export enlarged drawing of the embodiment of the present invention；
Fig. 6 is attachment means scheme of erection of the embodiment of the present invention；
Fig. 7 is locating sleeve structure figure of the embodiment of the present invention；
Fig. 8 is that different model of the embodiment of the present invention crosses liquid valve arrangement figure；
Fig. 9 is different model needle valve structure figure of the embodiment of the present invention.
Embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Embodiment is described in further detail.
As shown in Figure 4 and Figure 5, the present embodiment attachment means be arranged on fluid power grinding extruding lathe base and pressure head it
Between, top is sealed with pressure head by rubber gasket, bottom docking needle-valve body.
Specifically, as shown in Figure 6 to 8, the present embodiment attachment means include positioning sleeve 3, cross liquid valve 1 and 2 three, pin
Point, positioning sleeve 3 is cylindrical shape, crosses liquid valve 1 positioned at the top of positioning sleeve 3 and the prominent top of positioning sleeve 3, the insertion positioning of needle-valve body top
Cover 3 bottoms and docked with crossing liquid valve, pin 2 laterally penetrates positioning sleeve 3 and crosses liquid valve 1 and fix both, and positioning sleeve 3 is used for
It is cylindrical to fix to clamp needle-valve body, crosses liquid valve 1 and is used to precisely guide abrasive flows flow direction.
Wherein, liquid valve 1 is crossed with the gap of positioning sleeve 3 to coordinate.
Cross on liquid valve 1 and offer oblique liquid pass hole, liquid pass hole top is used to align with the abrasive flows import on pressure head, bottom
Hold for being alignd with the abrasive material circulation road on needle-valve body.
In the present embodiment, crossing liquid valve 1 has Multiple Type, and the liquid pass hole angle of inclination for crossing liquid valve of different model and aperture are not
Together.
As shown in figure 9, liquid valve 1 was changed according to different model needle-valve body, can fast accurate extruding high-pressure oil duct hole and spray
Hole, the accuracy of product quality processing is improved, reach the purpose of final Improving The Quality of Products.
Preferably, the machining accuracy parameter of liquid valve 1 is crossed：Material, low-alloy wear-resistant steel WEL-TEN AR360C；Hardness HB >=
235~401；Machining tool is from Digit Control Machine Tool, vertical machining centre, electric spark numerical-control lathe；The part end face depth of parallelism is selected
0.01；
Positioning sleeve machining accuracy parameter：Material GCr15；Machining tool selects Digit Control Machine Tool.
Assembly precision parameter：Cross liquid valve and the positioning sleeve assembling depth of parallelism 0.02.Cross between liquid valve and positioning sleeve and pass throughPin
Son connection.
As shown in figure 4, it is put into after attachment means and needle-valve body are installed in base.Control panel input tonnage, add
Between man-hour, extrusion passes (abrasive material total amount), press work button, lathe starts to extrude.Abrasive material is pressurizeed from pressure by machine tool hydraulic pump
Head outflow, connecting element directed it in needle-valve body oil hole, and abrasive flows are to oil hole elder generation crush and grind, then to spray orifice sharp edge
Carry out rounding, deburring and carbon remover.
As can be seen from the above technical solutions, the present invention has following distinguishing feature：
1. crossing, liquid valve wearability, the loading demands that are hit are high, and material uses low-alloy wear-resistant steel WEL-TEN AR360C；Firmly
Spend HB >=235~401.The alloy material is famous with high-strength tenacity, high hard toughness.In the abrasion working condition of certain impact load
Under, service life is higher than wear resistant cast iron.
2. designing liquid valve lower surface according to different structure needle-valve body, liquid pass hole, dowel hole machining accuracy are high.Work as replacing
During converted products, only liquid valve need to be changed.It is smooth to cross liquid valve upper surface, is brought into close contact under high pressure with rubber gasket,
Prevent liquid abrasive material seepage, improve sealing, the features such as realizing fast quick change production, precise positioning.
3. clamping connector is simple, change rapid.Crush and grind is disposably carried out to spray orifice, oil hole, the time only needs 2 points
Clock.
Found by practical application, attachment means the selection of material wearability is strong, and installation is simple, and manufacture difficulty is low, install compared with
To be simple, the processing needs of multi items have been adapted to.Needle-valve body oil hole, spray orifice are carried out squeezing and ground simultaneously, make spray orifice fuel flow system
Number brings up to 0.8 from 0.65, the crudy of product is ensure that, by the cleanliness issues solution of product high pressure fuel feed hole and spray orifice
Certainly.According to different model needle-valve body quick-replaceable difference connector, the precise positioning of liquid abrasive material passage is realized, solves mill
Expect situation about overflowing, prevent the unfavorable factor of machine tooling impaired performance.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means, it is characterised in that including：Positioning sleeve (3), mistake
Liquid valve (1) and pin (2) three parts, positioning sleeve (3) are cylindrical shape, cross liquid valve (1) and are located at positioning sleeve (3) top and prominent positioning
(3) top is covered, needle-valve body top insertion positioning sleeve (3) bottom is simultaneously docked with crossing liquid valve, and pin (2) laterally penetrates positioning sleeve
(3) and cross liquid valve (1) and fix both, positioning sleeve (3) is cylindrical for fixing to clamp needle-valve body, crosses liquid valve (1) and is used for precisely
Guide abrasive flows flow direction.
2. needle-valve body oil hole as claimed in claim 1 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Cross on liquid valve (1) and offer oblique liquid pass hole, liquid pass hole top is used to align with the abrasive flows import on pressure head, and bottom is used for
Alignd with the abrasive material circulation road on needle-valve body.
3. needle-valve body oil hole as claimed in claim 2 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Crossing liquid valve (1) has a Multiple Type, and the liquid pass hole angle of inclination for crossing liquid valve of different model and aperture are different, respectively with different model
Needle-valve body is corresponding.
4. needle-valve body oil hole as claimed in claim 1 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Liquid valve (1) is crossed with positioning sleeve (3) gap to coordinate.
5. needle-valve body oil hole as claimed in claim 1 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Positioning sleeve (3) material is GCr15.
6. needle-valve body oil hole as claimed in claim 1 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Cross liquid valve (1) material selection low-alloy wear-resistant steel WEL-TENAR360C, hardness HB >=235~401.
7. needle-valve body oil hole as claimed in claim 6 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Liquid valve (1) part end face depth of parallelism is crossed as 0.01.
8. needle-valve body oil hole as claimed in claim 7 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Cross liquid valve (1) and positioning sleeve (2) the assembling depth of parallelism 0.02.
9. needle-valve body oil hole as claimed in claim 1 and spray orifice abrasive material crush and grind attachment means, it is characterised in that described
Cross between liquid valve (1) and positioning sleeve (3) and pass through diameterPin (2) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970758.1A CN107891372A (en) | 2017-10-18 | 2017-10-18 | Needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970758.1A CN107891372A (en) | 2017-10-18 | 2017-10-18 | Needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means |
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| Publication Number | Publication Date |
|---|---|
| CN107891372A true CN107891372A (en) | 2018-04-10 |
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ID=61802767
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710970758.1A Pending CN107891372A (en) | 2017-10-18 | 2017-10-18 | Needle-valve body oil hole and spray orifice abrasive material crush and grind attachment means |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637717A (en) * | 2018-05-21 | 2018-10-12 | 国营第六六厂 | A kind of clamp for machining of accurate quickly tungsten alloys valve seat inclined hole |
| CN108908091A (en) * | 2018-07-23 | 2018-11-30 | 长春理工大学 | A kind of abrasive Flow micropore polishing position machining device |
| CN110181353A (en) * | 2019-05-23 | 2019-08-30 | 南京航空航天大学 | A kind of valve seat inner flow passage phase perforation abrasive material deburring special combination fixture |
| CN110977787A (en) * | 2019-12-30 | 2020-04-10 | 国营第六一六厂 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
| CN111015523A (en) * | 2019-12-31 | 2020-04-17 | 西安成立航空制造有限公司 | Clamp and method for removing burrs of central flow passage of fuel injection nozzle of aero-engine by abrasive flow |
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| EP1900935A2 (en) * | 2006-09-14 | 2008-03-19 | Mitsubishi Heavy Industries, Ltd. | Method of machining injection hole in nozzle body, apparatus therefor, and fuel injection nozzle produced using the method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637717A (en) * | 2018-05-21 | 2018-10-12 | 国营第六六厂 | A kind of clamp for machining of accurate quickly tungsten alloys valve seat inclined hole |
| CN108637717B (en) * | 2018-05-21 | 2020-06-02 | 国营第六一六厂 | Machining clamp for precise and rapid hydraulic extrusion of inclined hole of valve seat |
| CN108908091A (en) * | 2018-07-23 | 2018-11-30 | 长春理工大学 | A kind of abrasive Flow micropore polishing position machining device |
| CN108908091B (en) * | 2018-07-23 | 2019-12-24 | 长春理工大学 | Abrasive flow micropore polishing and positioning processing equipment |
| CN110181353A (en) * | 2019-05-23 | 2019-08-30 | 南京航空航天大学 | A kind of valve seat inner flow passage phase perforation abrasive material deburring special combination fixture |
| CN110181353B (en) * | 2019-05-23 | 2020-12-01 | 南京航空航天大学 | Special combined clamp for deburring of valve seat inner flow passage through hole by abrasive |
| CN110977787A (en) * | 2019-12-30 | 2020-04-10 | 国营第六一六厂 | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps |
| CN111015523A (en) * | 2019-12-31 | 2020-04-17 | 西安成立航空制造有限公司 | Clamp and method for removing burrs of central flow passage of fuel injection nozzle of aero-engine by abrasive flow |
| CN111015523B (en) * | 2019-12-31 | 2020-12-18 | 西安成立航空制造有限公司 | Clamp and method for removing burrs of central flow passage of fuel injection nozzle of aero-engine by abrasive flow |
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