JPH0240424B2 - - Google Patents
Info
- Publication number
- JPH0240424B2 JPH0240424B2 JP58090346A JP9034683A JPH0240424B2 JP H0240424 B2 JPH0240424 B2 JP H0240424B2 JP 58090346 A JP58090346 A JP 58090346A JP 9034683 A JP9034683 A JP 9034683A JP H0240424 B2 JPH0240424 B2 JP H0240424B2
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- assembly
- aluminum
- atmosphere
- heat exchanger
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0012—Brazing of heat exchangers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【発明の詳細な説明】
(イ) 技術分野
本発明はアルミニウム製熱交換器の組立て物、
即ち多数のアルミニウム薄板がアルミニウム薄板
フインを介して多層に積層されてなるアルミニウ
ム製熱交換器の組立体のアルミニウム薄板間のろ
う付け方法に関するものである。[Detailed description of the invention] (a) Technical field The present invention relates to an assembly of an aluminum heat exchanger,
That is, the present invention relates to a method of brazing aluminum thin plates in an assembly of an aluminum heat exchanger in which a large number of aluminum thin plates are laminated in multiple layers with aluminum thin plate fins interposed therebetween.
(ロ) 背景技術
アルミニウム製熱交換器をはじめとするアルミ
ニウム製の組立構造物のろう付け方法には、(a)塩
化物フラツクス浴中に浸漬して行なうデイツプろ
う付け、(b)塩化物フラツクスを塗付して空気中又
は乾燥雰囲気中で行なうフラツクスろう付け、(c)
弗化物フラツクスを塗付して不活性ガス中で行な
うろう付け、(d)フラツクスなしで不活性ガス中で
行なうろう付け、(e)真空ろう付けなどがある。(B) Background art Brazing methods for assembled aluminum structures, including aluminum heat exchangers, include (a) dip brazing performed by immersion in a chloride flux bath, and (b) chloride flux bath. (c) Flux brazing performed in air or in a dry atmosphere by applying
These include brazing in which a fluoride flux is applied and carried out in an inert gas, (d) brazing in an inert gas without flux, and (e) vacuum brazing.
本発明は上記したうちの(b)、(c)、(d)の方法に属
するもので、特に(c)と(d)の方法において好適に用
い得るものである。 The present invention belongs to methods (b), (c), and (d) among the above-mentioned methods, and can be particularly suitably used in methods (c) and (d).
換言すれば、本発明は昇温された特定雰囲気中
でのアルミニウム製組立構造物のろう付け方法に
関するものである。 In other words, the present invention relates to a method for brazing assembled aluminum structures in a specific elevated temperature atmosphere.
アルミニウムは放射率が小さく（約0.1程度）
このためにその加熱を真空炉などのような放射伝
熱を主とする炉中で行なうと昇温するのが遅いの
で、アルミニウム表面の酸化が進んでろう付け性
が阻害されてしまう。特に容積の大きなアルミニ
ウム組立構造物の場合には、表面に比べて内部の
昇温が著しく遅れてしまい、ろう付けが困難とな
る。 Aluminum has a low emissivity (about 0.1)
For this reason, if the heating is performed in a furnace that mainly uses radiation heat transfer, such as a vacuum furnace, the temperature rises slowly, and the oxidation of the aluminum surface progresses, impairing brazing properties. Particularly in the case of an aluminum assembly structure with a large volume, the temperature rise inside the structure is significantly slower than that at the surface, making brazing difficult.
このことは、雰囲気中でのろう付け加熱につい
ても同様である。雰囲気中での加熱の伝熱は放射
伝熱と強制或は自然対流伝熱によるものである
が、大型ろう付け組立構造物を包む外部の雰囲気
を強制的に対流させても、構造物の内部の流気は
少なく、内部の昇温が遅れる。 This also applies to brazing heating in an atmosphere. Heat transfer in the atmosphere is based on radiation heat transfer and forced or natural convection heat transfer, but even if the atmosphere surrounding a large brazed assembly structure is forced to undergo convection, the inside of the structure will not be affected. The flow of air is small, and internal temperature rise is delayed.
アルミニウム製大型構造物、特にアルミニウム
製熱交換器組立構造物のろう付けのほとんどが前
記した(a)のデイツプろう付け法に依つているのは
このためである。このようにやむなくデイツプろ
う付け法によつているが、ろう付け後にフラツク
ス浴液を構造物、特にその内部から完全に除去す
るのは大変なことで、手間と暇をかけているのが
実情である。 This is why most of the brazing of large aluminum structures, especially aluminum heat exchanger assembly structures, relies on the dip brazing method described in (a) above. Although the dip brazing method is unavoidable, it is difficult to completely remove the flux bath liquid from the structure, especially from the inside, after brazing, and the reality is that it takes time and effort. be.
(ハ) 発明の概要
本発明はデイツプろう付法けによることなく、
アルミニウム製熱交換器組立構造物の全体を均一
かつ効果的に雰囲気ガス中において昇温してろう
付けを行なうものである。(c) Summary of the invention The present invention does not rely on dip brazing method, but
The entire aluminum heat exchanger assembly structure is brazed by uniformly and effectively raising the temperature in an atmospheric gas.
一般に、熱交換器はその容積に比して伝熱面積
をできるだけ大きくするように工夫されており、
熱交換媒体である気体又は液体が通る大きな伝熱
面積を有する流路を有している。本発明において
は、この流路をろう付け雰囲気ガスの通路として
活用し、雰囲気ガスを該流路中に強制的に循環貫
流してアルミニウム組立構造物を対流伝熱的にそ
の内部をも均一に昇温してろう付けを完成するも
のである。 Generally, heat exchangers are designed to have as large a heat transfer area as possible compared to their volume.
It has a flow path with a large heat transfer area through which gas or liquid as a heat exchange medium passes. In the present invention, this flow path is utilized as a passage for brazing atmosphere gas, and the atmosphere gas is forced to circulate through the flow path to uniformly distribute heat inside the aluminum assembly structure by convective heat transfer. Brazing is completed by raising the temperature.
(ニ) 実施例
以下、本発明を添付図面を参照して更に詳細に
説明する。(d) Examples Hereinafter, the present invention will be explained in more detail with reference to the accompanying drawings.
ろう付けされる熱交換器組立体１はろう材が表
面にクラツドされたアルミニウム薄板２（第２図
の符号２１）と、波形に加工されたアルミニウム
薄板フイン３（同２２，２３）を積層して組立て
たものである。 The heat exchanger assembly 1 to be brazed is made up of a laminated aluminum thin plate 2 (reference numeral 21 in Fig. 2) whose surface is clad with a brazing material and an aluminum thin plate fin 3 (reference numeral 22 and 23 in Fig. 2) processed into a corrugated shape. It was assembled by hand.
この組立体は、フラツクスを塗付後に、真空度
10-1Torr、温度180℃で乾燥後直ちに外気と遮断
された雰囲気ろう付け装置１２中に入れられる。 After applying flux, this assembly is
Immediately after drying at 10 -1 Torr and a temperature of 180° C., it is placed in an atmosphere brazing device 12 that is isolated from the outside air.
該雰囲気ろう付け装置１２は、送入口８より装
置中に導入され、加熱ヒーター１０によつて加熱
された雰囲気ガスを循環するためのシロツコ型の
フアン６を有する。７は該雰囲気ガス循環フアン
を駆動するためのモーターである。装置１２は組
立体１を入れるための扉１３を有し、この扉には
雰囲気ガスの温度を制御するための熱電対１１が
設けられている。９は必要によつて雰囲気ガスを
装置外に排気するための排気口である。 The atmosphere brazing apparatus 12 has a cylindrical fan 6 for circulating atmospheric gas introduced into the apparatus through an inlet 8 and heated by a heater 10. 7 is a motor for driving the atmospheric gas circulation fan. The device 12 has a door 13 for admitting the assembly 1, which door is equipped with a thermocouple 11 for controlling the temperature of the ambient gas. Reference numeral 9 denotes an exhaust port for exhausting atmospheric gas to the outside of the apparatus if necessary.
第２図において符号２４で示される部分をろう
付け接合部とする熱交換器組立体１は、一端の開
口が収れんして前記雰囲気ガス循環フアンに対面
する雰囲気ガス収集ガイド４をなし、他端が雰囲
気ガス配分ガイド板５を有する外套２６に入れら
れて、装置１２内に置かれる。この外套２６はあ
らかじめ装置１２中に設置されていても、或は装
置外で組立体１を収容した後に組立体と共に装置
中に搬入されてもよい。 In the heat exchanger assembly 1, the part indicated by the reference numeral 24 in FIG. is placed in the device 12 in a jacket 26 with an atmospheric gas distribution guide plate 5 . This jacket 26 may be installed in the device 12 in advance, or it may be carried into the device together with the assembly after the assembly 1 has been accommodated outside the device.
そこで、N2ガスを送入口８より送入し、排出
口９より排気し、装置内の空気をN2ガスで置換
する。N2ガスは循環フアン６により図中の矢印
の如く循環してヒーター１０により加熱される。
この加熱された雰囲気ガスは外套２６の入口開口
端にある配分ガイド５により均一に配分され、熱
交換器組立体１の熱交換媒体の流路２５を強制的
に通過させられる。これによつて、熱交換組立体
はその内部にある複雑なろう付け接合部２４の全
部が昇温する。N2ガスは外套収集ガイド４を経
てフアン６により吸引されて循環する。 Therefore, N 2 gas is introduced through the inlet 8 and exhausted through the exhaust port 9 to replace the air inside the device with the N 2 gas. The N 2 gas is circulated by the circulation fan 6 as shown by the arrow in the figure and heated by the heater 10 .
This heated atmospheric gas is uniformly distributed by the distribution guide 5 at the inlet open end of the jacket 26 and forced through the heat exchange medium flow path 25 of the heat exchanger assembly 1. This causes the heat exchange assembly to heat up all of the complex braze joints 24 therein. The N 2 gas is circulated through the mantle collection guide 4 and sucked in by the fan 6 .
実際の運転において、N2ガスろう付け雰囲気
の露点で管理して−50℃〜−60℃とし、ろう付け
を温度610±３℃下で５分間保持して行なつた。
温度制御は熱電対１１によりヒーター１０の電流
値を加減することによつて行なつた。昇温速度を
610℃まで20分以内に雰囲気循環量で調節した。
これによるろう付け結果は、安定したろうのヒレ
ツトを得て完全であつた。 In actual operation, the dew point of the N 2 gas brazing atmosphere was controlled to be -50°C to -60°C, and brazing was carried out at a temperature of 610 ± 3°C for 5 minutes.
Temperature control was performed by adjusting the current value of the heater 10 using a thermocouple 11. heating rate
The temperature was adjusted to 610°C within 20 minutes by adjusting the atmosphere circulation rate.
The brazing results were complete with stable solder fillets.
(ホ) 発明の効果
上記のように、本発明は熱交換器組立体の流路
をろう付け雰囲気ガスの強制的循環通路としたこ
とにより、該組立体の内部をも均一に昇温でき、
良好なろう付けを行なうことができる優れた効果
を有する。(e) Effects of the invention As described above, the present invention uses the flow path of the heat exchanger assembly as a forced circulation path for the brazing atmosphere gas, thereby making it possible to uniformly raise the temperature inside the assembly.
It has an excellent effect of making it possible to perform good brazing.
第１図は本発明に使用する装置の説明的縦断面
図、第２図はアルミニウム製熱交換器組立体の一
部の説明的な断面図である。
符号説明、１……アルミニウム製熱交換器組立
体、２……アルミニウム薄板、３……アルミニウ
ム薄板の波形フイン、１２……炉装置、２６……
アルミニウム製熱交換器組立体を保持する外套。
FIG. 1 is an explanatory longitudinal sectional view of an apparatus used in the present invention, and FIG. 2 is an explanatory sectional view of a portion of an aluminum heat exchanger assembly. Description of symbols, 1... Aluminum heat exchanger assembly, 2... Aluminum thin plate, 3... Corrugated fin of aluminum thin plate, 12... Furnace device, 26...
Mantle that holds the aluminum heat exchanger assembly.
Claims (1)
による加熱ろう付け方法において、該雰囲気ガス
が加熱されて一定方向で循環して流れる外気と遮
断された断熱室内に上記した組立体を入れて該組
立体の全体を外方より該雰囲気下で加熱すると共
に、該組立体の熱交換媒体の複数の流路を上記し
た一定方向で循環する雰囲気ガスの流れと平行に
おいて該複数の流路の全てに雰囲気ガスを上記し
た一定方向で同時かつ強制的に循環させて流して
該組立体を内方からも加熱することを特徴とする
アルミニウム製熱交換器の組立体をろう付けする
方法。1. In a heating brazing method using atmospheric gas for an aluminum heat exchanger assembly, the above-mentioned assembly is placed in an insulated chamber that is cut off from outside air where the atmospheric gas is heated and circulated in a certain direction. is heated from the outside in the atmosphere, and at the same time, an atmosphere is applied to all of the plurality of flow paths for the heat exchange medium in parallel to the flow of the atmospheric gas circulating in the above-mentioned constant direction. A method for brazing an assembly of an aluminum heat exchanger, characterized in that the assembly is heated also from the inside by flowing gas simultaneously and forcibly in the fixed direction described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9034683A JPS59215266A (en) | 1983-05-23 | 1983-05-23 | Brazing method of heat exchanger assembly formed of aluminum and jig device used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9034683A JPS59215266A (en) | 1983-05-23 | 1983-05-23 | Brazing method of heat exchanger assembly formed of aluminum and jig device used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59215266A JPS59215266A (en) | 1984-12-05 |
| JPH0240424B2 true JPH0240424B2 (en) | 1990-09-11 |
Family
ID=13995966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9034683A Granted JPS59215266A (en) | 1983-05-23 | 1983-05-23 | Brazing method of heat exchanger assembly formed of aluminum and jig device used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59215266A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616938B2 (en) * | 1986-04-25 | 1994-03-09 | 三菱アルミニウム株式会社 | Reactive soldering method |
| GB2221415B (en) * | 1988-08-04 | 1991-04-17 | Ferranti Int Signal | A method of brazing articles containing aluminium. |
| KR100424097B1 (en) * | 2001-06-19 | 2004-03-26 | 대한열기 주식회사 | Preheating system of brazing object for batch-type brazing furnace system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232160A (en) * | 1975-09-05 | 1977-03-11 | Nippon Denso Co Ltd | Method of manufacturing of heat exchanger |
-
1983
- 1983-05-23 JP JP9034683A patent/JPS59215266A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59215266A (en) | 1984-12-05 |
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