CN106956053B - A kind of vacuum brazing method of titanium alloy pipeline - Google Patents
A kind of vacuum brazing method of titanium alloy pipeline Download PDFInfo
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- CN106956053B CN106956053B CN201710128433.9A CN201710128433A CN106956053B CN 106956053 B CN106956053 B CN 106956053B CN 201710128433 A CN201710128433 A CN 201710128433A CN 106956053 B CN106956053 B CN 106956053B
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- titanium alloy
- alloy pipeline
- welding
- pipeline
- bottom outlet
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Classifications
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/14—Titanium or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to the technical fields of vacuum brazing, refer in particular to a kind of vacuum brazing method of titanium alloy pipeline.The welding bottom outlet of engine body is processed as the braze-welded structure of straight hole and cambered surface cooperation by the present invention, it is re-introduced into fiber optic scope inspection soldering gap, and vacuum welding is carried out according to step a ~ step i in a vacuum furnace, it is insufficient to solve traditional vacuum brazing fill solder, there are problems that pipe leakage risk, improves the leakproofness and reliability of vacuum brazing.Wherein, the braze-welded structure that the present invention also uses straight hole and cambered surface to cooperate, titanium alloy pipeline is squeezed by external force, so that titanium alloy pipeline generates axial position, the bottom of the bottom and welding bottom outlet that may insure titanium alloy pipeline is in close contact, cored solder after solving the problems, such as traditional thawing easily flows into the channel of welding bottom outlet, also solves the problem of traditional welding portion flow resistance changes the blocking risk of excessive generation, improves the quality of welding.
Description
Technical field
The present invention relates to the technical fields of vacuum brazing, refer in particular to a kind of vacuum brazing method of titanium alloy pipeline.
Background technique
Titanium alloy is widely used in aerospace field with its excellent performance and high stability, is specifically for use in engine
In the conveyance conduit of system intermediate fuel oil and gas.Since pipe-line system is sufficiently complex, it usually needs tens of root canal roads and engine
Be reliably connected between ontology, welding surface is complex-shaped, and weld seam quantity is more；It is relatively thin additionally, due to pipeline wall thickness, using argon
The biggish welding method of the fuel factors such as arc-welding easily leads to commissure since thermal stress is larger or the hidden of stress cracking occurs in tube wall
Suffer from；Similarly, since mutually blocking interference between pipeline, electron-bombardment welding or method for laser welding cannot be equally used.By
In vacuum brazing energy disposal molding, welding efficiency is high, and therefore unstressed residue problem is using the method for vacuum brazing
Solve the problems, such as the preferred method being tightly connected between more root canal roads and engine body.
There are welded gaps to be difficult to ensure for common vacuum brazing, and there are cored solder attachments unevenly, welds after leading to welding
Expect lack of fill, pipeline is caused to there is the risk of leakage；Simultaneously as cooperating not close between pipeline and bottom outlet, cored solder is melted
It is flowed into inside engine runner after change by latent channel, engine runner flow resistance is caused to increase, or even the risk of blocking；Above-mentioned two
Kind risk will cause serious threat to the normal work of engine, need that method is taken to solve.
Summary of the invention
The present invention provides a kind of vacuum brazing method of titanium alloy pipeline for problem of the prior art.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of vacuum brazing method of titanium alloy pipeline provided by the invention, comprising the following steps:
The lower part of the welding bottom outlet of engine body is processed as cambered surface by a；The upper part of welding bottom outlet is processed as directly
Hole, the lower edge of the straight hole and the cambered surface of the lower part of welding bottom outlet are tangent, are formed and are matched between the straight hole and titanium alloy pipeline
The soldering gap of conjunction, the soldering gap are 0.02~0.05mm；
B carries out repair to the welding ends of titanium alloy pipeline, by the exit end face of titanium alloy pipeline and titanium alloy tube pipeline outer wall
Verticality be arranged within 0.03mm, and by rounding angle at the outer rim of the exit end face of titanium alloy pipeline；
Titanium alloy pipeline is inserted into welding bottom outlet, and applies the external force perpendicular to bottom outlet end face on titanium alloy pipeline by c,
The bottom squeeze of titanium alloy pipeline is deformed, is fitted in titanium alloy pipeline in the cambered surface of welding bottom outlet；
D fixes all titanium alloy pipeline recruitment clamps；
E, using fiber optic scope to titanium alloy pipeline carry out one by one check soldering gap, it is ensured that titanium alloy pipeline with start
The soldering gap that cooperation is formed between machine ontology bottom outlet meets 0.02mm~0.05mm；
Using silver-based cored solder muddy is made with ethylene alcoholic solvent in silver-based cored solder by f, is uniformly applied to weld seam week
It encloses；
Engine body, titanium alloy pipeline and frock clamp are put into vacuum drying oven by g, and air pressure in vacuum drying oven is taken out
To 2Pa；
Vacuum drying oven is heated to 800 DEG C~900 DEG C by h, and the heating-up time is 1h~3h, and then high temperature is kept for 10~30 minutes,
Finally stop heating, keeps vacuum drying oven to be in vacuum state, by engine body, pipeline and frock clamp together furnace cooling
To room temperature；
I opens vacuum drying oven, takes out workpiece, removes frock clamp, completes welding.
Wherein, the cambered surface radius of the step a is 5mm~20mm, and the cambered surface height is 1mm~1.5mm.
Wherein, the radius of corner is 0.05mm~0.1mm.
Wherein, the engine body is titanium alloy material.
Beneficial effects of the present invention:
The welding bottom outlet of engine body is processed as the braze-welded structure of straight hole and cambered surface cooperation by the present invention, is re-introduced into optical fiber
Sight glass inspection is brazed gap, and carries out vacuum welding according to step a~step i in a vacuum furnace, solves traditional vacuum
There is pipe leakage risk in brazing solder lack of fill, improve the leakproofness and reliability of vacuum brazing.Wherein,
The braze-welded structure that the present invention also uses straight hole and cambered surface to cooperate squeezes titanium alloy pipeline by external force, so that titanium alloy pipeline produces
Raw axial position, it can be ensured that the bottom of titanium alloy pipeline and the bottom of welding bottom outlet are in close contact, and solve traditional thawing
Cored solder afterwards easily flows into the problem of channel of welding bottom outlet, also solves traditional welding portion flow resistance and changes excessive generation
Blocking risk the problem of, improve the quality of welding.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the vacuum brazing method of titanium alloy pipeline of the invention.
Fig. 2 is the structural schematic diagram of vacuum brazing of the invention.
Fig. 3 is the structural schematic diagram of welding bottom outlet of the invention.
Fig. 4 is the structural schematic diagram of engine body and titanium alloy pipeline of the invention.
Appended drawing reference in Fig. 1 to Fig. 4 includes:
The upper part of 1-2-titanium alloy of engine body pipeline, 3-welding bottom outlet
The lower part of 4-welding bottom outlets.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further below with reference to embodiment and attached drawing
Bright, the content that embodiment refers to not is limitation of the invention.Detailed retouch is carried out to the present invention below in conjunction with attached drawing 1-4
It states.
A kind of vacuum brazing method of titanium alloy pipeline described in the present embodiment, comprising the following steps:
The lower part 4 of the welding bottom outlet of engine body 1 is processed as cambered surface by a；The upper part 3 of welding bottom outlet is processed as
Straight hole, the lower edge of the straight hole and the cambered surface of the lower part 4 of welding bottom outlet are tangent, shape between the straight hole and titanium alloy pipeline 2
At the soldering gap of cooperation, the soldering gap is 0.02~0.05mm；
B carries out repair to the welding ends of titanium alloy pipeline 2, by the exit end face of titanium alloy pipeline 2 and titanium alloy pipeline 2
The verticality of outer wall is arranged within 0.03mm, and by rounding angle at the outer rim of the exit end face of titanium alloy pipeline 2；
Titanium alloy pipeline 2 is inserted into welding bottom outlet, and applied on titanium alloy pipeline 2 perpendicular to the outer of bottom outlet end face by c
Power deforms the bottom squeeze of titanium alloy pipeline 2, is fitted in titanium alloy pipeline 2 in the cambered surface of welding bottom outlet；Specifically, lead to
Cross and apply external force on titanium alloy pipeline 2 so that the bottom squeeze of titanium alloy pipeline 2 deforms, axial deflection be 0.8mm~
1.5mm；
D fixes all titanium alloy pipelines 2 with frock clamp；Preferably, the frock clamp uses high temperature alloy steel
Material；
E carries out titanium alloy pipeline 2 using fiber optic scope to check soldering gap one by one, it is ensured that titanium alloy pipeline 2 and hair
The soldering gap that cooperation is formed between 1 bottom outlet of motivation ontology meets 0.02mm~0.05mm；
Using silver-based cored solder muddy is made with ethylene alcoholic solvent in silver-based cored solder by f, is uniformly applied to weld seam week
It encloses；
Engine body 1, titanium alloy pipeline 2 and frock clamp are put into vacuum drying oven by g, and by air pressure in vacuum drying oven
It is evacuated within 2Pa；
Vacuum drying oven is heated to 800 DEG C~900 DEG C by h, and the heating-up time is 1h~3h, and then high temperature is kept for 10~30 minutes,
Finally stop heating, vacuum drying oven is kept to be in vacuum state, engine body 1, pipeline and frock clamp is cold with furnace together
But to room temperature；
I opens vacuum drying oven, takes out workpiece, removes frock clamp, completes welding.
The welding bottom outlet of engine body 1 is processed as the braze-welded structure of straight hole and cambered surface cooperation by the present invention, is re-introduced into light
Fine sight glass inspection is brazed gap, and carries out vacuum welding according to step a~step i in a vacuum furnace, solves traditional true
, there is pipe leakage risk in empty brazing solder lack of fill, improve the leakproofness and reliability of vacuum brazing.
Wherein, the braze-welded structure that the present invention also uses straight hole and cambered surface to cooperate squeezes titanium alloy pipeline 2 by external force, makes
It obtaining titanium alloy pipeline 2 and generates axial position, it can be ensured that the bottom of titanium alloy pipeline 2 and the bottom of welding bottom outlet are in close contact,
Cored solder after solving the problems, such as traditional thawing easily flows into bottom outlet channel, also solves traditional welding portion flow resistance and becomes
The problem of changing the blocking risk of excessive generation, improves the quality of welding.
A kind of vacuum brazing method of titanium alloy pipeline described in the present embodiment, the cambered surface radius of the step a be 5mm~
20mm, the cambered surface height are 1mm~1.5mm.
A kind of vacuum brazing method of titanium alloy pipeline described in the present embodiment, the radius of corner be 0.05mm~
0.1mm。
A kind of vacuum brazing method of titanium alloy pipeline described in the present embodiment, the engine body 1 are titanium alloy material
Material.And specifically, it is preferable to ground, titanium alloy material is TC4 titanium alloy；TC4 titanium alloy has intensity height and density is small, mechanical performance
Good, toughness and etch resistant properties are fine.
The above is only present pre-ferred embodiments, is not intended to limit the present invention in any form, although
The present invention is disclosed as above with preferred embodiment, and however, it is not intended to limit the invention, any person skilled in the art,
It does not depart within the scope of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent change
The equivalent embodiment of change, but without departing from the technical solutions of the present invention, technology refers to above embodiments according to the present invention
Made any simple modification, equivalent change and modification, belong in the range of technical solution of the present invention.
Claims (4)
1. a kind of vacuum brazing method of titanium alloy pipeline, which comprises the following steps:
The lower part of the welding bottom outlet of engine body is processed as cambered surface by a；The upper part of welding bottom outlet is processed as straight hole, institute
The lower edge for stating straight hole and the cambered surface of the lower part of welding bottom outlet are tangent, and the pricker of cooperation is formed between the straight hole and titanium alloy pipeline
Weld gap, the soldering gap are 0.02~0.05mm；
B carries out repair to the welding ends of titanium alloy pipeline, by hanging down for the exit end face of titanium alloy pipeline and titanium alloy tube pipeline outer wall
Straight degree is arranged within 0.03mm, and by rounding angle at the outer rim of the exit end face of titanium alloy pipeline；
Titanium alloy pipeline is inserted into welding bottom outlet, and applies the external force perpendicular to bottom outlet end face on titanium alloy pipeline by c, by titanium
The bottom squeeze of alloy pipeline deforms, and is fitted in titanium alloy pipeline in the cambered surface of welding bottom outlet；
D fixes all titanium alloy pipeline recruitment clamps；
E carries out titanium alloy pipeline using fiber optic scope to check soldering gap one by one, it is ensured that titanium alloy pipeline and engine sheet
The soldering gap that cooperation is formed between body bottom outlet meets 0.02mm~0.05mm；
Silver-based cored solder is made muddy with ethylene alcoholic solvent, is uniformly applied to around weld seam by f using silver-based cored solder；
Engine body, titanium alloy pipeline and frock clamp are put into vacuum drying oven, and air pressure in vacuum drying oven are evacuated to 2Pa by g
Within；
Vacuum drying oven is heated to 800 DEG C~900 DEG C by h, and the heating-up time is 1h~3h, then high temperature holding 10~30 minutes, finally
Stop heating, keeps vacuum drying oven to be in vacuum state, cool to engine body, pipeline and frock clamp with the furnace room together
Temperature；
I opens vacuum drying oven, takes out workpiece, removes frock clamp, completes welding.
2. a kind of vacuum brazing method of titanium alloy pipeline according to claim 1, it is characterised in that: the step a's
Cambered surface radius is 5mm~20mm, and the cambered surface height is 1mm~1.5mm.
3. a kind of vacuum brazing method of titanium alloy pipeline according to claim 1, it is characterised in that: the radius of corner
For 0.05mm~0.1mm.
4. a kind of vacuum brazing method of titanium alloy pipeline according to claim 1, it is characterised in that: the engine sheet
Body is titanium alloy material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128433.9A CN106956053B (en) | 2017-03-06 | 2017-03-06 | A kind of vacuum brazing method of titanium alloy pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128433.9A CN106956053B (en) | 2017-03-06 | 2017-03-06 | A kind of vacuum brazing method of titanium alloy pipeline |
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| CN106956053A CN106956053A (en) | 2017-07-18 |
| CN106956053B true CN106956053B (en) | 2019-03-26 |
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| CN108679059A (en) * | 2018-08-08 | 2018-10-19 | 重庆超力高科技股份有限公司 | The connection structure of side plate and attachment |
| CN111810480A (en) * | 2019-04-12 | 2020-10-23 | 浙江三花制冷集团有限公司 | Reversing valve and manufacturing method thereof |
| CN110722234B (en) * | 2019-10-11 | 2020-12-04 | 哈尔滨工业大学 | Nickel titanium base alloy low-temperature connecting joint and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591063A (en) * | 1982-06-28 | 1984-01-06 | Mitsubishi Metal Corp | Socket and spigot brazing method of end parts of pipe and bar |
| CN1010604B (en) * | 1986-06-25 | 1990-11-28 | 昭和铅株式会社 | Intake manifold and mfg. method therefor |
| CN102528197A (en) * | 2011-11-15 | 2012-07-04 | 北京控制工程研究所 | Brazing method for titanium alloy injector of two-component thruster |
| CN102581414A (en) * | 2012-03-16 | 2012-07-18 | 李明雨 | Method for brazing copper aluminum tubes without aid of brazing flux |
| CN204321426U (en) * | 2014-12-08 | 2015-05-13 | 长春大东集团有限公司 | A kind of pipeline soldering connecting structure |
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Address after: No. 601, floor 6, building S3, Fenggang Tian'an Digital City, No. 66, Dongshen Second Road, Yantian village, Fenggang town, Dongguan City, Guangdong Province Patentee after: Dongguan city meyners Aviation Technology Co. Ltd. Address before: 518000 Guangdong Province, Shenzhen city Longgang District Huangge road Tianhui building A block 818 Patentee before: Dongguan city meyners Aviation Technology Co. Ltd. |
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