CN109848499A - A kind of preparation method of Complex Heat device core - Google Patents
A kind of preparation method of Complex Heat device core Download PDFInfo
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- CN109848499A CN109848499A CN201910178206.6A CN201910178206A CN109848499A CN 109848499 A CN109848499 A CN 109848499A CN 201910178206 A CN201910178206 A CN 201910178206A CN 109848499 A CN109848499 A CN 109848499A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 41
- 238000005219 brazing Methods 0.000 claims abstract description 30
- 238000005476 soldering Methods 0.000 claims abstract description 27
- 229910000679 solder Inorganic materials 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000000306 component Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000008358 core component Substances 0.000 abstract description 2
- 244000062793 Sorghum vulgare Species 0.000 abstract 1
- 235000019713 millet Nutrition 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 208000002925 dental caries Diseases 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of preparation methods of Complex Heat device core, including following operation: solder uniformly being applied note in heat-exchanging component faying face after cleaning heat-exchanging component；The weldering of inner mold millet cake is located in B, C sections, guarantees that inner mold face is close to close with B, C sections；It carries out that overall heat exchange device core component is put into vacuum brazing furnace progress overall vacuum soldering after core integrally assembles, is cooled to room temperature and comes out of the stove after soldering.The vacuum brazing method that the present invention uses is, it can be achieved that have the production of Complex Heat device core, this method tool structure is simple, scheme is simple and fast, at low cost；The problems such as component assembly positioning hardly possible, welding process component strain in vacuum brazing technique can be effectively solved simultaneously.
Description
Technical field
The invention belongs to precision processing technology fields, are related to a kind of preparation method of Complex Heat device core.
Background technique
Certain large complicated heat exchanger core bodies are made of more than 2000 stainless steel pressings, the shape inside heat exchanger
The complicated cavity structure of pressure can not gone here and there long-channel.When work, thin-walled components in such multiple cavity configuration are to flowing through difference therein
Double media of temperature carry out heat exchange to reduce the temperature difference, while also requiring work under the particular surroundings such as energy heatproof, pressure resistance, corrosion-resistant
Make.These components have following features: 1, being mostly thin-walled pressing and bending part, and shape is special；2, quantity more (more than 2000) and
Multi-layer stacked structure, inside closing, it is narrow to open section；3, it needs to be connected and forms two independent long circulation cavitys, mutually not
It can string pressure；4, the two groups of cavitys formed will bear the pressure of > 5MPa/10min；5, core≤0.5mm after making is convenient for group
In the cylinder of sealing.Since core is special, internal closing, opens that section is narrow, unimodule wall is thin, when being combined welding
Weld seam up to 20000 is a plurality of, therefore manufacture difficulty is very big.
For such complicated core, generally made of several techniques such as melting welding, soldering, diffusion welding (DW), splicing.
However due to closing inside core, open that section is narrow, and melting welding assembly welding technique cannot achieve connection request；Dip brazing, resistance brazing,
Gas brazing, high frequency brazing are limited by core is also unable to satisfy connection request；Diffusion welding (DW) is limited by this structure and can not be pressed,
Also it can not carry out；Adhesive technology is because of Effect of Materials rate of heat exchange, and bonding strength is limited, so can not also realize.
Summary of the invention
Present invention solves the technical problem that being to provide a kind of preparation method of Complex Heat device core, large size may be implemented
The production of Complex Heat device core, to meet the operating condition application under the conditions of harsh environment.
The present invention is to be achieved through the following technical solutions:
A kind of preparation method of Complex Heat device core, including following operation:
1) after sufficiently cleaning in the inner mold face of Complex Heat device core, preseting solder on pricker surface is waited at it: by paste pricker
Material uniformly applies note with syringe on the face to be brazed in inner mold face, polishes flat after solder solidification；
Inner mold face is welded on C sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantees inner mold
It is close to close with C sections of thin plates in face；
Inner mold face is welded on B sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantees inner mold
It is close to close with B sections of thin plates in face；
2) according to the design requirement of Complex Heat device core, B sections of thin plates and C section thin plates are interlocked assembly, elder generation when assembly
It is assembled since centre, it is then corresponding in sequence to be assembled to upper and lower, the right and left；Wherein up and down equipment adjustment ovality≤
0.5mm, left and right extend in parallel；One section outermost tenses after placing beam ring again after the assembly is completed；
Component after assembly is lain in the V-type tooling of multiple parallel arrangements, V-type tooling and beam ring correspond；
3) it opens fire door component is packed into vacuum brazing furnace and carry out first time vacuum brazing, it is heated to 1000 after vacuumizing~
At 1100 DEG C, 500~600Pa is divided, soldering keeps 20~30min；
With furnace vacuum cooled to 200~300 DEG C of filling inert gases after the completion of soldering, come out of the stove after balancing furnace pressure；
4) dismantle beam ring tooling after, then assembly surface pass through argon arc welding welding flow passage chamber F chamber；
5) design requirement is pressed, then the fixed foil-shaped brazing material at the top up and down of component installation attachment strap uses reserve energy spot welding machine
Attachment strap is positioned；It will be placed in V-type tooling after the component uniform fixed strain of beam ring again, V-type tooling and beam ring correspond；
6) it opens fire door component is packed into vacuum brazing furnace and carry out second of vacuum brazing, it is heated to 1010 after vacuumizing~
At 1050 DEG C, 500~600Pa is divided, soldering keeps 20~30min；It is flat to furnace pressure with furnace vacuum cooled after the completion of soldering
It comes out of the stove after weighing apparatus, completes the preparation of Complex Heat device core.
The cleaning is that the part of Complex Heat device core is cleaned after oil removing and dried up in clean gasoline, then
The part cleaned up to pricker surface will be cleaned in dehydrated alcohol that part is put into hairbrush again to stand after taking out in dehydrated alcohol
Dried up with hot hair dryer.
The paste solder is that powdered filler metal HBCu58MnCo is tuned into paste with binder, is then infused by syringe
It penetrates on the arcuate surface and extended surface in inner mold face.
The inner mold face is not more than 0.08mm with B sections of thin plates, C sections of sheet metal assembly gaps, and parallel between inner mold face
Degree is not more than 0.1mm.
It when the described first time vacuum brazing, vacuumizes are as follows: vacuumize vacuum degree of cold state: 1 × 10-2Pa, working vacuum degree:
100-500Pa；
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 60min；
700 DEG C are heated to the rate of 180 DEG C/h again, divides 100Pa, keeps the temperature 20min；
900 DEG C are heated to the rate of 360 DEG C/h again, divides 150Pa, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h again, divides 500Pa, in 1020 DEG C of ± 5 DEG C of solderings, keeps 30min；
Cooling program after soldering are as follows: be cooled to 700 DEG C with the rate of 240 DEG C/h, filled with furnace vacuum cooled to 200 DEG C
Inert gas makes furnace pressure reach 9 × 104It comes out of the stove after Pa.
The fixed foil-shaped brazing material HBNi82CrSiB at the top up and down of component installation attachment strap, then with energy storage point
Welding machine positions attachment strap.
It when second of vacuum brazing, vacuumizes are as follows: vacuum degree of cold state: 1 × 10-2Pa, working vacuum degree: 3 × 10-2Pa adds
Hot program:
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 40min；
950 DEG C are heated to the rate of 180 DEG C/h again, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h to start to be brazed；
Soldering: in 1020 DEG C of ± 5 DEG C of solderings, 30min is kept；
Cooling program: being cooled to 700 DEG C with the rate of 240 DEG C/h, with furnace vacuum cooled gas cooling, after being cooled to 65 DEG C
It comes out of the stove.
When the described argon arc welding welding, welding wire selects ￠ 1.2H12Cr26Ni21, argon arc welding requirement: electric current 30-50A, gas
Flow 3-5L/min；Weld seam is fine and close, uniform, continuous, is segmented spot welding, each layer welding.
Compared with prior art, the invention has the following beneficial technical effects:
The preparation method of Complex Heat device core provided by the invention, for prepared Complex Heat device core component knot
Closing inside structure, opens that section is narrow, and single-piece is thin wall stamping part again, and component weld seam adds up up to 20100 rigors；It adopts
With inner mold face preseting solder, positioning assembly is then carried out again, is met its matching requirements in assembly, is realized high-precision assembly
It is carried out with while preseting solder；Then the component assembled is applied into pretightning force with beam ring and is placed on V-type tooling, this is whole group
Closing welding and how controlling deformation is the key that success or failure, because part is mostly thin wall stamping part, internal all have very big stress, and B,
It is connected again for different inner mold faces between C sections, it is uneven that there are serious weight distributions, and how to allow stress therein to be cancelled out each other, or
Gently disappearing is the key that solve deformation, and the present invention has made V-type tooling as dress of exchanging work, component is controlled and has been placed on V-type face thus
When can realize one-time formed control with both sides stress.
Last argon arc welding welding is also extremely important, it is desirable that cannot influence soldered seam, seal again, and cannot become
Shape；Therefore the present invention uses low current, and two-sided inert gas shielding fast welding method carries out.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention Complex Heat device core to be prepared；
Fig. 2 is the predetermined schematic diagram of inner mold face solder；
Fig. 3 is inner mold face in C sections of thin plates arrangement schematic diagrames；
Fig. 4 is the assembly positioning schematic diagram in B sections of thin plates and inner mold face；
Fig. 5 is C sections and the assembly in inner mold face positions schematic diagram；
Fig. 6 is beam ring and V-type tooling schematic diagram；
Fig. 7 is component and V-type tooling assembling schematic diagram；
Fig. 8 is the component assembling schematic diagram after attachment strap positioning.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing, and the explanation of the invention is not limited.
Referring to Fig. 1-Fig. 8, the present invention is directed to the Complex Heat device core of existing design scheme, proposes a kind of Complex Heat device
The preparation method of core, including following operation:
1) after sufficiently cleaning in the inner mold face of Complex Heat device core, preseting solder on pricker surface is waited at it: by paste pricker
Material uniformly applies note with syringe on the face to be brazed in inner mold face, polishes flat after solder solidification；
Inner mold face is welded on C sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantees inner mold
It is close to close with C sections of thin plates in face；
Inner mold face is welded on B sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantees inner mold
It is close to close with B sections of thin plates in face；
2) according to the design requirement of Complex Heat device core, B sections of thin plates and C section thin plates are interlocked assembly, elder generation when assembly
It is assembled since centre, it is then corresponding in sequence to be assembled to upper and lower, the right and left；Wherein up and down equipment adjustment ovality≤
0.5mm, left and right extend in parallel；One section outermost tenses after assembling beam ring again after the assembly is completed；
Component after assembly is lain on the V-type face of the V-type tooling of multiple parallel arrangements, V-type tooling and beam ring are one by one
It is corresponding；
3) it opens fire door component is packed into vacuum brazing furnace and carry out first time vacuum brazing, it is heated to 1000 after vacuumizing~
At 1100 DEG C, 500~600Pa is divided, soldering keeps 20~30min；
With furnace vacuum cooled to 200~300 DEG C of filling inert gases after the completion of soldering, come out of the stove after balancing furnace pressure；
4) dismantle beam ring tooling after, then assembly surface pass through argon arc welding welding flow passage chamber F chamber；
5) design requirement is pressed, then the fixed foil-shaped brazing material at the top up and down of component installation attachment strap uses reserve energy spot welding machine
Attachment strap is positioned；It will be placed in V-type tooling after the component uniform fixed strain of beam ring again, V-type tooling and beam ring correspond；
6) it opens fire door component is packed into vacuum brazing furnace and carry out second of vacuum brazing, it is heated to 1010 after vacuumizing~
At 1050 DEG C, 500~600Pa is divided, soldering keeps 20~30min；It is flat to furnace pressure with furnace vacuum cooled after the completion of soldering
It comes out of the stove after weighing apparatus, completes the preparation of Complex Heat device core.
Further, the cleaning is to clean the part of Complex Heat device core after oil removing simultaneously in clean gasoline
Then drying will clean the part that cleans up to pricker surface from dehydrated alcohol with hairbrush again in dehydrated alcohol that part is put into
It is dried up immediately with hot hair dryer after middle taking-up.
The paste solder is that powdered filler metal HBCu58MnCo is tuned into paste with binder, is then infused by syringe
It penetrates on the arcuate surface and extended surface in inner mold face.
Further, the inner mold face and B section thin plates, C sections of sheet metal assembly gaps are no more than 0.08mm, and inner mold face it
Between the depth of parallelism be not more than 0.1mm.
Specifically, being vacuumized are as follows: vacuumize vacuum degree of cold state: 1 × 10-2Pa, work when the described first time vacuum brazing
Make vacuum degree: 100-500Pa；
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 60min；
700 DEG C are heated to the rate of 180 DEG C/h again, divides 100Pa, keeps the temperature 20min；
900 DEG C are heated to the rate of 360 DEG C/h again, divides 150Pa, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h again, divides 500Pa, in 1020 DEG C of ± 5 DEG C of solderings, keeps 30min；
Cooling program after soldering are as follows: be cooled to 700 DEG C with the rate of 240 DEG C/h, filled with furnace vacuum cooled to 200 DEG C
Inert gas is come out of the stove after so that furnace pressure is reached 9 × 104Pa.
Specifically, the fixed foil-shaped brazing material HBNi82CrSiB at the top up and down of component installation attachment strap, is then used
Reserve energy spot welding machine positions attachment strap.
Specifically, being vacuumized when second of vacuum brazing are as follows: vacuum degree of cold state: 1 × 10-2Pa, working vacuum degree: 3 ×
10-2Pa heating schedule:
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 40min；
950 DEG C are heated to the rate of 180 DEG C/h again, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h to start to be brazed；
Soldering: in 1020 DEG C of ± 5 DEG C of solderings, 30min is kept；
Cooling program: being cooled to 700 DEG C with the rate of 240 DEG C/h, with furnace vacuum cooled gas cooling, after being cooled to 65 DEG C
It comes out of the stove.
Specifically, welding wire selects ￠ 1.2H12Cr26Ni21, argon arc welding requirement: electric current 30- when the described argon arc welding welding
50A, air-flow 3-5L/min；Weld seam is fine and close, uniform, continuous, is segmented spot welding, each layer welding.
Example given above is to realize the present invention preferably example, and the present invention is not limited to the above embodiments.This field
Technical staff's technical solution according to the present invention technical characteristic any nonessential addition, the replacement made, belong to this
The protection scope of invention.
Claims (8)
1. a kind of preparation method of Complex Heat device core, which is characterized in that including following operation:
1) after sufficiently cleaning in the inner mold face of Complex Heat device core, preseting solder on pricker surface is waited at it: paste solder is used
Syringe uniformly applies note on the face to be brazed in inner mold face, polishes flat after solder solidification；
Inner mold face is welded on C sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantee inner mold face with
C sections of thin plates are close to close；
Inner mold face is welded on B sections of thin plates according to design requirement point, every 38~40mm positions an inner mold face, guarantee inner mold face with
B sections of thin plates are close to close；
2) according to the design requirement of Complex Heat device core, B sections of thin plates and C section thin plates are interlocked assembly, elder generation is therefrom when assembly
Between start to assemble, it is then corresponding in sequence to be assembled to upper and lower, the right and left；Wherein up and down equipment adjustment ovality≤
0.5mm, left and right extend in parallel；One section outermost tenses after assembling beam ring again after the assembly is completed；
Component after assembly is lain on the V-type face of the V-type tooling of multiple parallel arrangements, V-type tooling and beam ring correspond；
3) it opens fire door and component is packed into vacuum brazing furnace progress first time vacuum brazing, be heated to 1000~1100 after vacuumizing
DEG C when, divide 500~600Pa, soldering keep 20~30min；
With furnace vacuum cooled to 200~300 DEG C of filling inert gases after the completion of soldering, come out of the stove after balancing furnace pressure；
4) dismantle beam ring tooling after, then assembly surface pass through argon arc welding welding flow passage chamber F chamber；
5) design requirement is pressed, then the fixed foil-shaped brazing material at the top up and down of component installation attachment strap will be taken with reserve energy spot welding machine
Plate positioning；It will be placed in V-type tooling after the component uniform fixed strain of beam ring again, V-type tooling and beam ring correspond；
6) it opens fire door and component is packed into vacuum brazing furnace second of vacuum brazing of progress, be heated to 1010~1050 after vacuumizing
DEG C when, divide 500~600Pa, soldering keep 20~30min；With furnace vacuum cooled after the completion of soldering, after furnace pressure balance
It comes out of the stove, completes the preparation of Complex Heat device core.
2. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the cleaning is will be complicated
The part of heat exchanger core body is cleaned after oil removing and is dried up in clean gasoline, then will be used in dehydrated alcohol that part is put into again
Hairbrush cleans the part cleaned up to pricker surface and is dried up immediately with hot hair dryer after taking out in dehydrated alcohol.
3. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the paste solder be by
Powdered filler metal HBCu58MnCo is tuned into paste with binder, and the arcuate surface and extended surface in inner mold face are then injected at by syringe
On.
4. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the inner mold face and B sections
Thin plate, C sections of sheet metal assembly gaps are not more than 0.08mm, and the depth of parallelism between inner mold face is not more than 0.1mm.
5. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the first time vacuum pricker
It when weldering, vacuumizes are as follows: vacuumize vacuum degree of cold state: 1 × 10-2Pa, working vacuum degree: 100-500Pa；
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 60min；
700 DEG C are heated to the rate of 180 DEG C/h again, divides 100Pa, keeps the temperature 20min；
900 DEG C are heated to the rate of 360 DEG C/h again, divides 150Pa, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h again, divides 500Pa, in 1020 DEG C of ± 5 DEG C of solderings, keeps 30min；
Cooling program after soldering are as follows: 700 DEG C are cooled to the rate of 240 DEG C/h, with furnace vacuum cooled to 200 DEG C of filling inertia
Gas makes furnace pressure reach 9 × 104It comes out of the stove after Pa.
6. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the component is pushing up up and down
Fixed foil-shaped brazing material HBNi82CrSiB at end installation attachment strap, is then positioned attachment strap with reserve energy spot welding machine.
7. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that when second of vacuum brazing,
It vacuumizes are as follows: vacuum degree of cold state: 1 × 10-2Pa, working vacuum degree: 3 × 10-2Pa heating schedule:
Heating schedule after vacuumizing are as follows: be heated to 450 DEG C with the rate of 120 DEG C/h, keep the temperature 40min；
950 DEG C are heated to the rate of 180 DEG C/h again, keeps the temperature 120min；
1020 DEG C are heated to the rate of 500 DEG C/h to start to be brazed；
Soldering: in 1020 DEG C of ± 5 DEG C of solderings, 30min is kept；
Cooling program: being cooled to 700 DEG C with the rate of 240 DEG C/h, with furnace vacuum cooled gas cooling, goes out after being cooled to 65 DEG C
Furnace.
8. the preparation method of Complex Heat device core as described in claim 1, which is characterized in that the argon arc welding welding
When, welding wire selects ￠ 1.2H12Cr26Ni21, argon arc welding requirement: electric current 30-50A, air-flow 3-5L/min；Weld seam is fine and close, uniformly,
Continuously, spot welding, each layer welding are segmented.
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| CN201910178206.6A CN109848499B (en) | 2019-03-08 | 2019-03-08 | Preparation method of complex heat exchanger core |
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Cited By (4)
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| CN112338453A (en) * | 2020-10-23 | 2021-02-09 | 西安远航真空钎焊技术有限公司 | Machining method of thin-wall complex cavity |
| CN112338448A (en) * | 2020-10-23 | 2021-02-09 | 西安远航真空钎焊技术有限公司 | Preparation method of corrugated sheet sandwich partition plate assembly |
| CN113414558A (en) * | 2021-08-23 | 2021-09-21 | 西安远航真空钎焊技术有限公司 | Manufacturing method of coil heat exchanger core |
| CN113427102A (en) * | 2021-07-15 | 2021-09-24 | 西安远航真空钎焊技术有限公司 | Vacuum brazing clamp for three-way connection of hexagonal corrugated plates |
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