CN107838572A - A kind of welding method of pintle formula ejector filler - Google Patents
A kind of welding method of pintle formula ejector filler Download PDFInfo
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- CN107838572A CN107838572A CN201711057184.5A CN201711057184A CN107838572A CN 107838572 A CN107838572 A CN 107838572A CN 201711057184 A CN201711057184 A CN 201711057184A CN 107838572 A CN107838572 A CN 107838572A
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- ejector filler
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- midsole
- ignition
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- Fuel-Injection Apparatus (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to a kind of welding method of pintle formula ejector filler, including：The welding job of ignition mechanism is completed by Laser Welding；The welding job of ignition mechanism and spray chamber is completed by vacuum brazing；The welding job of silk screen mechanism is completed by resistance spot welding；The welding job of pipeline mechanism is completed by argon arc welding.The welding method of the pintle formula ejector filler uses different welding procedures for different parts, the pintle formula ejector filler of labyrinth is set to form firm connection, ensure that the part of high temperature alloy material and the part of stainless steel form high-quality connection, weld seam good airproof performance, high pressure can be born.
Description
Technical field
The present invention relates to compound welding technology field, more particularly to a kind of welding method of pintle formula ejector filler.
Background technology
Compared to solid propellant engine, liquid fuel motor adjustable thrust, energy transformation ratio are high, thrust-weight ratio is big, make
It is green safe with Hydrogen oxygen propellant, suitable for the development of the projects such as space scientific research, commercial space flight.Rocket thrust-weight ratio index it is upper
Rise, it is meant that to its structural reliability and the raising of stability requirement.And core of the thrust chamber as liquid fuel motor
Center portion part, it is to realize energy conversion, form the device of thrust, to its size, the accuracy of form and position and welding structure performance reliability
It is required that further improve.
The thrust chamber of liquid fuel motor need to be washed away in high temperature, high pressure, long-time hot-fluid and the severe bar such as judder
Worked under part, ensure property indices not rapid drawdown.To adapt to harsh operating mode, the thrust chamber zero of modern all kinds of liquid engines
Part is more using intensity height, good toughness, stainless steel corrosion-resistant, high temperature creep is good, high-temperature alloy material manufacture, and pass through spiral shell
Bolt, welding structure realize connection.
In the prior art pintle formula ejector filler because it is complicated, weld seam is intensive, weld joint air-tight requires high, common melting welding side
Method welding can not meet to require.
The content of the invention
The invention provides a kind of welding method of pintle formula ejector filler, solves or partly solves general in the prior art
Logical fusion welding method welding can not meet the technical problem of pintle formula ejector filler welding requirements, realize for being closed containing a large amount of high temperature
The welding of golden, stainless steel component ejector filler, all kinds of welding line joint air-tightness are good, and high-temperature loading property is good, sent out for liquid rocket
Motivation provides the technique effect of practical reliable ejector filler.
This application provides a kind of welding method of pintle formula ejector filler, the pintle formula ejector filler includes：Ignition mechanism,
Spray chamber, silk screen mechanism and pipeline mechanism；The welding method includes：
The welding job of the ignition mechanism is completed by Laser Welding；
The welding job of the ignition mechanism and the spray chamber is completed by vacuum brazing；
The welding job of the silk screen mechanism is completed by resistance spot welding；
The welding job of the pipeline mechanism is completed by argon arc welding.
Preferably, the welding job that the ignition mechanism is completed by Laser Welding, including：
The ignition channel of the ignition mechanism and ignition channel sleeve pipe are assembled up；
Laser positioning welding is carried out to the both ends of the ignition channel and the ignition channel sleeve pipe, and both ends are circumferential respectively
Uniform 4 tack welds；
The both ends of the ignition channel and ignition channel sleeve pipe progress laser is continuously welded.
Preferably, the technological parameter of the laser positioning welding is：Bonding power P=400W~480W, spot diameter d
≤ 0.2mm, defocusing amount Δ F=-0.2mm~+0.2mm, weld interval T=100ms~200ms；
The technological parameter that the laser continuously welds is：Bonding power P=1800W~2200W, spot diameter d≤
0.2mm, defocusing amount Δ F=-0.1mm~+0.1mm, speed of welding v=0.8~1.2m/min.
Preferably, the welding job that the ignition mechanism and the spray chamber are completed by vacuum brazing, including：
Pickling, dehydrogenation are carried out to the part of the ignition mechanism and the spray chamber, and are no less than by solvent soaking
15min；The part of the spray chamber includes：Liquid oxygen nozzle, multiple fuel nozzles, ejector filler ring, midsole and bottom；
The component assembly of the ignition mechanism and the spray chamber is got up, in the assembling process set solder resist and
Solder；
The ignition mechanism and the spray chamber are placed in 150 DEG C of 30~45min of drying in incubator；
The vacuum brazing is carried out to the ignition mechanism and the spray chamber in vacuum drying oven.
Preferably, the solvent is absolute ethyl alcohol；
The solder resist is aluminum oxide；
The material of the solder is BNi82CrSiB, including：First solder and the second solder；
First solder is cream solder made of powdered solder；
Second solder is that thin foil-shaped brazing material is cut into setting shape.
Preferably, after the component assembly of the ignition mechanism and the spray chamber：
Said midsole holds pricker groove with being provided with ring lower limit at the assembling of the ejector filler ring, for first；
The bottom holds pricker groove with being provided with ring lower limit at the assembling of the ejector filler ring, for second；
After the fuel nozzle assembles with said midsole, the upper surface of the fuel nozzle is set lower than said midsole upper table
The depression in face, hold pricker groove for the 3rd；
After the fuel nozzle assembles with the bottom, the lower surface of the fuel nozzle is set lower than the bottom upper table
The depression in face, hold pricker groove for the 4th；
The liquid oxygen nozzle is concordant with the upper surface of said midsole.
Preferably, the component assembly by the ignition mechanism and the spray chamber is got up, in the assembling process
Middle setting solder resist and solder, including：
The liquid oxygen nozzle and multiple fuel nozzles are assembled to form nozzle constituent element；
By on micropore of the solder resist coated in said midsole and the bottom；
After solder resist drying, the ejector filler ring is horizontally fixed on workbench, the bottom assembling is existed
On the ejector filler ring, by nozzle constituent element assembling on the bottom；
First solder is held in pricker groove coated in described second between the ejector filler ring and the bottom, and
The described 4th between the nozzle constituent element and the bottom holds in pricker groove；
By said midsole assembling on the ejector filler ring, will first solder be coated in the ejector filler ring with it is described
Described first between midsole holds in pricker groove, and the described 3rd between the nozzle constituent element and said midsole holds in pricker groove；
Second solder is set with ignition mechanism position corresponding with said midsole, in the ignition mechanism and institute
State and first solder is coated at the assembling of bottom, afterwards, by ignition mechanism assembling in said midsole and the bottom.
Preferably, the technological parameter of the vacuum brazing is：
Vacuum P=1 × 10-4Pa；
The temperature of the vacuum drying oven is from room temperature in 650 DEG C, V=550 DEG C of heating rate/h, soaking time t=5min；
During the temperature of the vacuum drying oven is from 650 DEG C to 850 DEG C, V=450 DEG C of heating rate/h, soaking time t=5min；
During the temperature of the vacuum drying oven is from 850 DEG C to 1060 DEG C, V=350 DEG C of heating rate/h；
The temperature of the vacuum drying oven is in T=1060 DEG C of peak temperature, soaking time t=20min；
The vacuum drying oven cooling down to 40 DEG C, with the spray chamber come out of the stove by the ignition mechanism.
Preferably, the welding job that the silk screen mechanism is completed by resistance spot welding, including：
Pickling is carried out to silk screen, pressure ring and pressing plate；
By the assembling of the silk screen, the pressure ring and the pressing plate together；
The silk screen, the pressure ring and the pressing plate are welded and fixed to form the silk screen mechanism by resistance spot welding；
Wherein, the nugget size for the solder joint that the resistance spot welding is formed is 2~2.5mm, and each solder joint is circumferentially uniform,
The spacing of the adjacent solder joint is 30~50mm.
Preferably, the welding job that the pipeline mechanism is completed by argon arc welding, including：
Pickling is carried out to the component of the pipeline mechanism；
Positioning welding is carried out to the component to be welded in the component by the argon arc welding；The tack weld is no less than 4
Individual, all tack welds are evenly arranged；
The component to be welded is continuously welded by the argon arc welding；In the continuous welding process, often welding is grown
Spend after 50~100mm, to be further continued for welding after standing 10min；
Wherein, when the component to be welded is foreign material, welding material is from the Z408 welding rods or diameter for knocking out coating
φ 2 H0Cr19Ni9Ti welding wires；When the component to be welded is same material, welding material is from diameter phi 2
H0Cr19Ni9Ti welding wires.
One or more technical schemes provided herein, have at least the following technical effects or advantages：
As a result of the welding job that ignition mechanism is completed by Laser Welding；By vacuum brazing complete ignition mechanism with
The welding job of spray chamber；The welding job of silk screen mechanism is completed by resistance spot welding；Pipeline mechanism is completed by argon arc welding
Welding job；Different welding procedures is used for different parts, the pintle formula ejector filler of labyrinth is formed firmly
Connection, ensure that the part of high temperature alloy material and the part of stainless steel form high-quality connection, weld seam good airproof performance, can bear
High pressure.So, pintle formula ejector filler welding requirements can not be met by efficiently solving common fusion welding method welding in the prior art
Technical problem, realize for the welding containing a large amount of high temperature alloys, the ejector filler of stainless steel component, all kinds of welding line joint air-tightness
Good, high-temperature loading property is good, and the technique effect of practical reliable ejector filler is provided for liquid-propellant rocket engine.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the welding method of pintle formula ejector filler provided in an embodiment of the present invention；
Fig. 2 is the first structure schematic diagram of ignition mechanism in pintle formula ejector filler provided in an embodiment of the present invention；
Fig. 3 is the second structural representation of ignition mechanism in pintle formula ejector filler provided in an embodiment of the present invention；
Fig. 4 is the assembling schematic diagram of ignition mechanism and spray chamber in pintle formula ejector filler provided in an embodiment of the present invention；
Fig. 5 is Fig. 4 schematic internal view；
Fig. 6 is the structural representation of silk screen mechanism in pintle formula ejector filler provided in an embodiment of the present invention.
(part that each label represents in diagram is followed successively by：In 1 ignition channel, 2 ignition channel sleeve pipes, 3 ejector filler rings, 4
Bottom, 5 bottoms)
Embodiment
The embodiment of the present application provides a kind of welding method of pintle formula ejector filler, solves or part solves existing skill
Common fusion welding method welding can not meet the technical problem of pintle formula ejector filler welding requirements in art, complete to light a fire by Laser Welding
The welding job of mechanism；The welding job of ignition mechanism and spray chamber is completed by vacuum brazing；Silk is completed by resistance spot welding
The welding job of net mechanism；The welding job of pipeline mechanism is completed by argon arc welding；Realize and be used for containing a large amount of high temperature alloys, no
The welding of the ejector filler of rust steel component, all kinds of welding line joint air-tightness are good, and high-temperature loading property is good, is carried for liquid-propellant rocket engine
For the technique effect of practical reliable ejector filler.
This application provides a kind of welding method of pintle formula ejector filler, pintle formula ejector filler includes：Ignition mechanism, atomization
Room, silk screen mechanism and pipeline mechanism；Referring to accompanying drawing 1, the welding method includes：
S1：The welding job of ignition mechanism is completed by Laser Welding.
S2：The welding job of ignition mechanism and spray chamber is completed by vacuum brazing.
S3：The welding job of silk screen mechanism is completed by resistance spot welding.
S4：The welding job of pipeline mechanism is completed by argon arc welding.
Further, step S1 includes：
S101：The ignition channel 1 of ignition mechanism is assembled up with ignition channel sleeve pipe 2；S102：To ignition channel 1 with
The both ends of ignition channel sleeve pipe 2 carry out laser positioning welding, and circumferential uniform 4 tack welds of both ends difference；S103：To igniting
The both ends of passage 1 and ignition channel sleeve pipe 2 carry out laser and continuously welded.
Wherein, the technological parameter of laser positioning welding is：Bonding power P=400W~480W, spot diameter d≤0.2mm,
Defocusing amount Δ F=-0.2mm~+0.2mm, weld interval T=100ms~200ms；The technological parameter that laser continuously welds is：
Bonding power P=1800W~2200W, spot diameter d≤0.2mm, defocusing amount Δ F=-0.1mm~+0.1mm, speed of welding v
=0.8~1.2m/min.
Further, step S2 includes：
S201：Pickling, dehydrogenation are carried out to the part of ignition mechanism and spray chamber, and 15min is no less than by solvent soaking；
The part of spray chamber includes：Liquid oxygen nozzle, multiple fuel nozzles, ejector filler ring 3, midsole 4 and bottom 5；S202：By ignition mechanism
Component assembly with spray chamber is got up, and solder resist and solder are set in assembling process；S203：Ignition mechanism and spray chamber are put
150 DEG C of 30~45min of drying in incubator；S204：Vacuum brazing is carried out to ignition mechanism and spray chamber in vacuum drying oven.
Wherein, solvent is absolute ethyl alcohol；Solder resist is aluminum oxide；The material of solder is BNi82CrSiB, including：First pricker
Material and the second solder；First solder is cream solder made of powdered solder；Second solder is cut into for thin foil-shaped brazing material and set
Shape shape.
Wherein, after the component assembly of ignition mechanism and spray chamber：Midsole 4 at the assembling of ejector filler ring 3 with being provided with ring
Lower limit, hold pricker groove for first；Bottom 5 holds pricker groove with being provided with ring lower limit at the assembling of ejector filler ring 3, for second；Fuel sprays
After mouth assembles with midsole 4, the upper surface of fuel nozzle is set lower than the depression of the upper surface of midsole 4, holds pricker groove for the 3rd；Fuel sprays
After mouth assembles with bottom 5, the lower surface of fuel nozzle is set lower than the depression of 5 upper surfaces of bottom, holds pricker groove for the 4th；Liquid oxygen sprays
Mouth is concordant with the upper surface of midsole 4.
Wherein, step S202 includes：
S2021：Liquid oxygen nozzle and multiple fuel nozzles are assembled to form nozzle constituent element.
S2022：By on micropore of the solder resist coated in midsole 4 and bottom 5.
S2023：After solder resist drying, ejector filler ring 3 is horizontally fixed on workbench, by the assembling of bottom 5 in spray
On device ring 3, by the assembling of nozzle constituent element on bottom 5.
S2024：First solder is held in pricker groove coated in second between ejector filler ring 3 and bottom 5, and nozzle constituent element
The 4th between bottom 5 holds in pricker groove.
S2025：Midsole 4 is assembled on ejector filler ring 3, the first solder is coated between ejector filler ring 3 and midsole 4
First holds in pricker groove, and the 3rd between nozzle constituent element and midsole 4 holds in pricker groove.
S2026：The second solder is set with 4 corresponding position of midsole in ignition mechanism, in ignition mechanism and the assembling of bottom
The first solder of place's coating, afterwards, by ignition mechanism assembling in midsole 4 and bottom 5.
Wherein, the technological parameter of vacuum brazing is：Vacuum P=1 × 10-4Pa；The temperature of vacuum drying oven is from room temperature to 650 DEG C
In, V=550 DEG C of heating rate/h, soaking time t=5min；During the temperature of vacuum drying oven is from 650 DEG C to 850 DEG C, heating rate V
=450 DEG C/h, soaking time t=5min；During the temperature of vacuum drying oven is from 850 DEG C to 1060 DEG C, V=350 DEG C of heating rate/h；Very
The temperature of empty stove is in T=1060 DEG C of peak temperature, soaking time t=20min；Vacuum drying oven cooling down is to 40 DEG C, ignition mechanism
Come out of the stove with spray chamber.
Further, step S3 includes：S301：Pickling is carried out to silk screen, pressure ring and pressing plate；S302：By silk screen, pressure ring and
Pressing plate assembles together；S303：Silk screen, pressure ring and pressing plate are welded and fixed to form silk screen mechanism by resistance spot welding；Wherein, resistance
The nugget size for the solder joint that spot welding is formed is 2~2.5mm, and each solder joint is circumferentially uniform, and the spacing of adjacent welds is 30~50mm.
Further, step S4 includes：S401：Pickling is carried out to the component of pipeline mechanism；S402：By argon arc welding to group
Component to be welded in part carries out positioning welding；Tack weld is no less than 4, and all tack welds are evenly arranged；S403：Pass through argon
Arc-welding is continuously welded to component to be welded；In continuous welding process, after every weld length is 50~100mm, after standing 10min
It is further continued for welding.
Wherein, when component to be welded is foreign material, welding material is from the Z408 welding rods or diameter phi 2 for knocking out coating
H0Cr19Ni9Ti welding wires；When component to be welded is same material, welding material selects the H0Cr19Ni9Ti welding wires of diameter phi 2.
The welding method of the pintle formula ejector filler of the application offer is provided below by specific embodiment：
The explanation of all kinds of welded joint structures：
1st, ignition mechanism laser welding head：Referring to accompanying drawing 2 and 3, ignition mechanism is by 2 groups of ignition channel 1, ignition channel sleeve pipe
Into the endoporus of ignition channel 1 conduction spark, the cavity of ignition channel 1 and sleeve pipe composition plays heat-blocking action.The outer wall of ignition channel 1 is straight
Footpath D0-0.05, the inner diameter D0+0.05 of ignition channel sleeve pipe 2, ensure fit-up gap r≤0.1mm, be required to that hole wall is smooth, nothing
Burr and scratch, the hole wall end face of ignition channel 1 do not allow chamfering.
2nd, spray chamber vacuum brazed joint：Referring to attached Figure 4 and 5, spray chamber is by a large amount of fuel nozzles and liquid oxygen nozzle, midsole
4th, bottom 5 and ejector filler ring 3 are formed, and fuel, by flowing into fuel/liquid oxygen nozzle in respective pipeline, is separated into tiny with oxidant
Drop, be atomized and be sufficiently mixed in the spray chamber that midsole 4, bottom 5 and ejector filler ring 3 form.In midsole 4, bottom 5 and spray
Note and set a chow ring diameter limit d=(D-4), depth 1mm, to be formed to lower limit and hold pricker groove, wherein D is midsole at the assembling of device ring 3
4th, the outline diameter of bottom 5.After fuel/liquid oxygen nozzle assembles with midsole 4, fuel nozzle upper surface is set lower than in midsole 4
Depression in the surface, lower limit depth 0.5mm, formed and hold pricker groove；Upper surface should be concordant after liquid oxygen nozzle assembles with midsole 4, does not allow
Now limit, liquid oxygen nozzle is blocked to prevent solder.After fuel nozzle assembles with bottom 5, the depression of 5 upper surfaces of bottom is set lower than,
Deep 0.5mm.
3rd, silk screen mechanism joint for resistance spot welding：Referring to accompanying drawing 6, silk screen mechanism is made up of silk screen, pressure ring and pressing plate, is covered at one
Lid be welded on midsole 4, be welded at one between ejector filler ring 3 and spiral case, fuel, oxidant by tank enter spray chamber it
It is preceding to be filtered by silk screen mechanism, avoid foreign matter from entering spray chamber plug nozzle.All monofilament of silk screen do not allow to be broken, grid
Deviation does not allow to be more than 60%, and edge is not allow for burr, and silk screen is not allow for fold.The roughness at pressure ring, pressing plate place to be welded
Ra≤6.3 μm, should not there are scar, burr.
4th, pipeline mechanism Argon Arc Welding Joint：Pipeline mechanism is made up of components such as upper bottom, spiral case, liquid oxygen inlet tube, flanges, shape
Into fuel channel, oxidant channel, both can not intercommunication, fuel and oxidant pass through respective passage by tank respectively and enter atomization
Room.Surface to be welded roughness Ra≤3.2 μm of pipeline mechanism component, should not there are scuffing, burr, 45 ° of angle of bevel, groove depth
Spend (D-1.5), to ensure that root face is unanimously 1.5mm, wherein D is surface to be welded wall thickness.
Wherein, fit-up gap requirement≤0.1mm of spray chamber vacuum brazing, the fit-up gap of remaining each welding method require
≤0.2mm.When fit-up gap is unsatisfactory for requiring, to machinery back chipping at fillet, uncoordinated place is polished using more than 800# sand paper.
The explanation of welding method：
1st, ignition mechanism is formed after ignition channel 1 is connected with ignition channel sleeve pipe 2 by Laser Welding.Positioned first
Welding, ensure that the confined state of the two will not be in continuous welding process because the reasons such as the dynamic, welding deformation of protection air-blowing become
Move, successively symmetrical positioning welding.
Positioning welding technological parameter：Bonding power P, spot diameter d, defocusing amount Δ F, weld interval T value are：Weld work(
Rate P=460W, spot diameter d=0.15mm, defocusing amount Δ F=0.1mm, weld interval T=120ms.
Then continuously welded, because of wall thickness 2mm in place's to be welded of ignition channel sleeve pipe 2, interface thickness 4mm, weld pool width should
＜ 3mm, to prevent burn through ignition channel sleeve pipe 2.
Continuous welding process parameter：Bonding power P, spot diameter d, defocusing amount Δ F, weld interval T value are：It is continuous to swash
Light, laser power P=1900W, speed of welding v=1.0m/min, spot diameter d=0.18mm, defocusing amount Δ F=0.1mm.
2nd, shape after being connected ignition mechanism, fuel/liquid oxygen nozzle, midsole 4, bottom 5, ejector filler ring 3 by vacuum brazing
Into spray chamber.Spray chamber all component material is GH4169, solder used be BNi-2 (BNi82CrSiB), containing it is powdered with
Two kinds of thin foil shape, solder resist are aluminum oxide, and solvent is absolute ethyl alcohol, and powdered solder is deployed into pasty state, by thin foil shape pricker
Material, which is torn open, is cut into required shape.
All parts carry out pickling, dehydrogenation before soldering, after using soaked in absolute ethyl alcohol 20min before assembling, wear cleaning
White mitten is assembled, and dipping solder using small spoon carries out applying pricker operation：
A. all fuel nozzles and liquid oxygen nozzle are assembled, form nozzle constituent element.
B. by solder resist coated in midsole 4, go to the bottom 5 micropore on, prevent from blocking such micropore during soldering.
C. after solder resist drying, ejector filler ring 3 is horizontally fixed on workbench, by the assembling of bottom 5 in ejector filler ring 3
On, solder is coated at the two assembling, solder should fill full appearance pricker groove, it is desirable to be higher by bottom 5 surfaces but should not be too high, it is desirable to≤
0.2mm。
D. nozzle constituent element is assembled on bottom 5, solder is coated at assembling, solder should fill full appearance pricker groove, be higher by down
The surface of bottom 5 but should not be too high, it is desirable to≤0.2mm.
E. midsole 4 is assembled on said structure, gently tapped using mallet to ensure fit-up gap≤0.1mm.
F. by solder coated at midsole 4 and nozzle constituent element assembling and at midsole 4 and the assembling of ejector filler ring 3, solder should be filled out
Full of each appearance pricker groove, it is desirable to be higher by the surface of midsole 4 but should not be too high, it is desirable to≤0.2mm, with non-fouling nozzle and micropore.
G. ignition mechanism is assembled on midsole 4, bottom 5, is difficult to coat cream solder because space is smaller, by thin foil shape pricker
Material reassembles after being sleeved on ignition mechanism；Ignition mechanism should be treated foregoing with need to overleaf coat solder at the assembling of bottom 5
After the solder of step coating dries no longer flowing, upset ejector filler ring 3, overleaf coat.
H. after spray chamber solder is smeared, 150 DEG C of drying 40min in incubator is placed in, solvent is volatilized completely, ensures
Vacuum drying oven can reach corresponding vacuum within a short period of time.
Vacuum brazing is carried out after ready, vacuum drying oven should be clean pollution-free, and spray chamber is horizontally fixed in stove.Vacuum pricker
Welding parameter：Vacuum P, heating rate V, peak temperature T, soaking time t values are：
Vacuum P=1 × 10-4Pa.
Room temperature is to 650 DEG C, V=550 DEG C of heating rate/h, soaking time t=5min.
650 DEG C to 850 DEG C, V=450 DEG C of heating rate/h, soaking time t=5min.
850 DEG C to 1060 DEG C, V=350 DEG C of heating rate/h.
T=1060 DEG C of peak temperature, soaking time t=20min.
Furnace cooling, come out of the stove to 40 DEG C, pay attention to, using packing case protection spray chamber, there should not be any debris to enter.
3rd, silk screen, pressure ring and pressing plate are connected by resistance spot welding.By each component pickling before weldering, welded after assembling.Resistance
Spot welding main technologic parameters：Conduction time t, welding pressure F, welding current I values are：
A. the thickness of pressure ring and pressing plate is 1.5mm, conduction time t=0.16~0.20s, welding pressure F=5000~
6000N, welding current I=7500~8200A.
B. the thickness of pressure ring and pressing plate is 2mm, conduction time t=0.24~0.28s, welding pressure F=7900~
8800N, welding current I=10000~11500A.
It is required that silk screen is paved during spot welding, the dot weld nugget diameter 2mm of formation, spot pitch 35mm, uniformly.
4th, the components such as upper bottom, spiral case, liquid oxygen inlet tube, flange are connected to form pipeline mechanism by argon arc welding；Will before weldering
Each component pickling；Positioning welding is carried out first, and all argon-arc welding seams are circular weld, it is desirable to tack weld is no less than 4,
Uniformly.
Tack welding technological parameter：Tungsten electrode diameter d, welding current I, welding speed V, argon flow amount D values are as follows：
A. it is heterogeneous material (1Cr18Ni9T and GH4169) to connected components, it is straight using the Z408 welding rods for knocking out coating, tungsten electrode
Footpath d=2.5~3mm, welding current I=90~120A, welding speed V=100~120mm/min, argon flow amount D=8~
12L/min。
B. it is material of the same race (being 1Cr18Ni9Ti) to connected components, it is straight using φ 2 H0Cr19Ni9Ti welding wires, tungsten electrode
Footpath d=2.5~3mm, welding current I=80~110A, welding speed V=100~120mm/min, argon flow amount D=8~
12L/min。
Argon arc welding continuous welding process parameter：Tungsten electrode diameter d, welding current I, welding speed V, argon flow amount D values are such as
Under：
A. it is heterogeneous material (1Cr18Ni9T and GH4169) to connected components, it is straight using the Z408 welding rods for knocking out coating, tungsten electrode
Footpath d=2.5~3mm, welding current I=110~140A, welding speed V=100~120mm/min, argon flow amount D=8~
12L/min。
B. it is material of the same race (being 1Cr18Ni9Ti) to connected components, it is straight using φ 2 H0Cr19Ni9Ti welding wires, tungsten electrode
Footpath d=2.5~3mm, welding current I=100~120A, welding speed V=100~130mm/min, argon flow amount D=8~
12L/min。
After often welding 60mm, 10min coolings are stood, are further continued for welding, to prevent the excessive soldering for influenceing spray chamber of heat input
Weldquality.
5th, when designing the defects of permission occurs in the weld seam of all welding methods, repair welding is allowed.Before vacuum brazing repair welding
The only row's of digging solder, repair welding peak temperature (T-20), wherein remaining parameter constant, T are the peak temperature of soldering first.Resistance spot welding
Permission repair welding on former nugget, technological parameter are constant.After Laser Welding, argon-arc welding seam fault location require that digging drains only, enter
Row repair welding, technological parameter are constant.So far, whole welding processings of pintle formula ejector filler are completed.
By above-mentioned welding method, the connection shaping of labyrinth pintle formula ejector filler is realized, realizes high temperature alloy
The high-quality connection of component and stainless steel component, weld seam good airproof performance, can bear high pressure.This method connection shaping scheme is reliable, fits
It can be used for the connection shaping of other materials, similar structures ejector filler after modification.
One or more technical schemes provided herein, have at least the following technical effects or advantages：
As a result of the welding job that ignition mechanism is completed by Laser Welding；By vacuum brazing complete ignition mechanism with
The welding job of spray chamber；The welding job of silk screen mechanism is completed by resistance spot welding；Pipeline mechanism is completed by argon arc welding
Welding job；Different welding procedures is used for different parts, the pintle formula ejector filler of labyrinth is formed firmly
Connection, ensure that the part of high temperature alloy material and the part of stainless steel form high-quality connection, weld seam good airproof performance, can bear
High pressure.So, pintle formula ejector filler welding requirements can not be met by efficiently solving common fusion welding method welding in the prior art
Technical problem, realize for the welding containing a large amount of high temperature alloys, the ejector filler of stainless steel component, all kinds of welding line joint air-tightness
Good, high-temperature loading property is good, and the technique effect of practical reliable ejector filler is provided for liquid-propellant rocket engine.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., it should be included in the present invention
Protection domain within.
Claims (10)
1. a kind of welding method of pintle formula ejector filler, the pintle formula ejector filler include：Ignition mechanism, spray chamber, wire mesh machine
Structure and pipeline mechanism；It is characterised in that it includes：
The welding job of the ignition mechanism is completed by Laser Welding；
The welding job of the ignition mechanism and the spray chamber is completed by vacuum brazing；
The welding job of the silk screen mechanism is completed by resistance spot welding；
The welding job of the pipeline mechanism is completed by argon arc welding.
2. the welding method of pintle formula ejector filler as claimed in claim 1, it is characterised in that described that institute is completed by Laser Welding
The welding job of ignition mechanism is stated, including：
The ignition channel of the ignition mechanism and ignition channel sleeve pipe are assembled up；
The both ends of the ignition channel and the ignition channel sleeve pipe are carried out with laser positioning welding, and both ends are circumferential uniform respectively
4 tack welds；
The both ends of the ignition channel and ignition channel sleeve pipe progress laser is continuously welded.
3. the welding method of pintle formula ejector filler as claimed in claim 2, it is characterised in that
The technological parameter of laser positioning welding is：Bonding power P=400W~480W, spot diameter d≤0.2mm, defocus
Measure Δ F=-0.2mm~+0.2mm, weld interval T=100ms~200ms；
The technological parameter that the laser continuously welds is：Bonding power P=1800W~2200W, spot diameter d≤0.2mm, from
Jiao's amount Δ F=-0.1mm~+0.1mm, speed of welding v=0.8~1.2m/min.
4. the welding method of pintle formula ejector filler as claimed in claim 1, it is characterised in that described to be completed by vacuum brazing
The welding job of the ignition mechanism and the spray chamber, including：
Pickling, dehydrogenation are carried out to the part of the ignition mechanism and the spray chamber, and 15min is no less than by solvent soaking；
The part of the spray chamber includes：Liquid oxygen nozzle, multiple fuel nozzles, ejector filler ring, midsole and bottom；
The component assembly of the ignition mechanism and the spray chamber is got up, solder resist and pricker are set in the assembling process
Material；
The ignition mechanism and the spray chamber are placed in 150 DEG C of 30~45min of drying in incubator；
The vacuum brazing is carried out to the ignition mechanism and the spray chamber in vacuum drying oven.
5. the welding method of pintle formula ejector filler as claimed in claim 4, it is characterised in that
The solvent is absolute ethyl alcohol；
The solder resist is aluminum oxide；
The material of the solder is BNi82CrSiB, including：First solder and the second solder；
First solder is cream solder made of powdered solder；
Second solder is that thin foil-shaped brazing material is cut into setting shape.
6. the welding method of pintle formula ejector filler as claimed in claim 5, it is characterised in that
After the component assembly of the ignition mechanism and the spray chamber：
Said midsole holds pricker groove with being provided with ring lower limit at the assembling of the ejector filler ring, for first；
The bottom holds pricker groove with being provided with ring lower limit at the assembling of the ejector filler ring, for second；
After the fuel nozzle assembles with said midsole, the upper surface of the fuel nozzle is set lower than said midsole upper surface
Depression, hold pricker groove for the 3rd；
After the fuel nozzle assembles with the bottom, the lower surface of the fuel nozzle is set lower than the bottom upper surface
Depression, hold pricker groove for the 4th；
The liquid oxygen nozzle is concordant with the upper surface of said midsole.
7. the welding method of pintle formula ejector filler as claimed in claim 6, it is characterised in that it is described by the ignition mechanism with
The component assembly of the spray chamber is got up, and solder resist and solder are set in the assembling process, including：
The liquid oxygen nozzle and multiple fuel nozzles are assembled to form nozzle constituent element；
By on micropore of the solder resist coated in said midsole and the bottom；
After solder resist drying, the ejector filler ring is horizontally fixed on workbench, by the bottom assembling described
On ejector filler ring, by nozzle constituent element assembling on the bottom；
First solder is held in pricker groove coated in described second between the ejector filler ring and the bottom, and it is described
The described 4th between nozzle constituent element and the bottom holds in pricker groove；
By said midsole assembling on the ejector filler ring, first solder is coated in the ejector filler ring and said midsole
Between it is described first hold pricker groove in, and between the nozzle constituent element and said midsole it is described 3rd hold pricker groove in；
Be set with second solder in corresponding with the said midsole position of the ignition mechanism, the ignition mechanism with it is described under
First solder is coated at the assembling at bottom, afterwards, by ignition mechanism assembling in said midsole and the bottom.
8. the welding method of pintle formula ejector filler as claimed in claim 4, it is characterised in that
The technological parameter of the vacuum brazing is：
Vacuum P=1 × 10-4Pa；
The temperature of the vacuum drying oven is from room temperature in 650 DEG C, V=550 DEG C of heating rate/h, soaking time t=5min；
During the temperature of the vacuum drying oven is from 650 DEG C to 850 DEG C, V=450 DEG C of heating rate/h, soaking time t=5min；
During the temperature of the vacuum drying oven is from 850 DEG C to 1060 DEG C, V=350 DEG C of heating rate/h；
The temperature of the vacuum drying oven is in T=1060 DEG C of peak temperature, soaking time t=20min；
The vacuum drying oven cooling down to 40 DEG C, with the spray chamber come out of the stove by the ignition mechanism.
9. the welding method of pintle formula ejector filler as claimed in claim 1, it is characterised in that described to be completed by resistance spot welding
The welding job of the silk screen mechanism, including：
Pickling is carried out to silk screen, pressure ring and pressing plate；
By the assembling of the silk screen, the pressure ring and the pressing plate together；
The silk screen, the pressure ring and the pressing plate are welded and fixed to form the silk screen mechanism by resistance spot welding；
Wherein, the nugget size for the solder joint that the resistance spot welding is formed is 2~2.5mm, and each solder joint is circumferentially uniform, adjacent
The spacing of the solder joint is 30~50mm.
10. the welding method of pintle formula ejector filler as claimed in claim 1, it is characterised in that described to be completed by argon arc welding
The welding job of the pipeline mechanism, including：
Pickling is carried out to the component of the pipeline mechanism；
Positioning welding is carried out to the component to be welded in the component by the argon arc welding；The tack weld is no less than 4, institute
There is the tack weld to be evenly arranged；
The component to be welded is continuously welded by the argon arc welding；In the continuous welding process, it is per weld length
After 50~100mm, it is further continued for welding after standing 10min；
Wherein, when the component to be welded is foreign material, welding material is from the Z408 welding rods or diameter phi 2 for knocking out coating
H0Cr19Ni9Ti welding wires；When the component to be welded is same material, welding material is welded from the H0Cr19Ni9Ti of diameter phi 2
Silk.
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