JPS62214865A - Brazing method for plate fin type heat exchanger - Google Patents
Brazing method for plate fin type heat exchangerInfo
- Publication number
- JPS62214865A JPS62214865A JP5888986A JP5888986A JPS62214865A JP S62214865 A JPS62214865 A JP S62214865A JP 5888986 A JP5888986 A JP 5888986A JP 5888986 A JP5888986 A JP 5888986A JP S62214865 A JPS62214865 A JP S62214865A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- heat exchanger
- brazing filler
- filler metal
- plate
- 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.)
- Pending
Links
- 238000005219 brazing Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 125000006850 spacer group Chemical group 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract 2
- 230000001680 brushing effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 17
- 229910000679 solder Inorganic materials 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、プレージングシートの使用が困難な特殊な
厚さのセパレートプレートを用いるプレートフィン型熱
交換器のろう付け方法に間する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for brazing a plate-fin type heat exchanger using separate plates of a special thickness that makes it difficult to use a plating sheet.
プレートフィン型熱交換器は第３図に示すように、交互
に直交させて数段に積み重ねられる流体通路形成用のコ
ルゲートフィン（１）・・・と、上記各コルゲートフィ
ン（１）・・・間に介挿される板状のセパレートプレー
ト（２）・・・と、前記各コルゲートフィン（１）・・
・の左右側面部に当接され、上下セパレートプレート（
２）・・・間に嵌挿されるサイドバー（３） （３）・
・・とで構成されている。そして、これらの各部は一般
に、上記セパレートプレート（２）・・・にプレージン
グシート（母材の片面または両面にろう材をクラフトし
たもの）を使用することによって、一体にろう付けされ
ている。As shown in Fig. 3, the plate fin type heat exchanger consists of corrugated fins (1) for forming fluid passages that are stacked alternately orthogonally in several stages, and each of the above corrugated fins (1). A plate-shaped separate plate (2) inserted between the two, and each of the corrugated fins (1)...
・The upper and lower separate plates (
2)...Side bar (3) inserted between (3)
It is composed of... These parts are generally brazed together by using a plating sheet (a base material with brazing material on one or both sides) on the separate plate (2).
ところが、上記プレージングシートは、アルミニウム会
社等で製造されているものであり、母材の厚さが規格化
されている。従って、規格品のプレージングシートが使
用できない特殊な厚さのセパレートプレート（２）・・
・を使用した熱交換器のろう付けでは、従来より一般に
金属浴ろう付けが採用されてきた。金属浴ろう付けは、
前記コルゲートフィン（１）・・・、セパレートプレー
ト（２）・・・、サイドバー（３） （３）・・・の各
部をろう材を介挿して組み合わせ、熱交換器に形成した
後、予熱してフラックスの浴中に浸漬し、一体にろう付
けする方法である。However, the plating sheet described above is manufactured by an aluminum company or the like, and the thickness of the base material is standardized. Therefore, the separate plate (2) has a special thickness that makes it impossible to use standard plating sheets.
・For brazing heat exchangers using metal bath brazing, metal bath brazing has traditionally been used. Metal bath brazing is
The corrugated fins (1)..., the separate plates (2)..., and the side bars (3) (3)... are assembled by inserting a brazing material to form a heat exchanger, and then preheated. This method involves immersing them in a flux bath and brazing them together.
然しなから、上記の金属浴ろう付けは、ろう付け部にろ
うが過剰に付着するという欠点がある。However, the above-mentioned metal bath brazing has the disadvantage that an excessive amount of solder adheres to the brazed portion.
このため、母材とろう材の成分が似かよっている場合、
例えばアルミニウム製熱交換器をアルミニウムろう（シ
リコン含有量１０％程度）でろう付けした場合等では、
ろう中のシリコンが母材内部に拡散して母材の融点を低
下させ、孔食を発生させるという問題を生じる。Therefore, if the components of the base metal and brazing filler metal are similar,
For example, when an aluminum heat exchanger is brazed with aluminum solder (silicon content approximately 10%),
Silicon in the solder diffuses into the base material, lowering the melting point of the base material and causing pitting corrosion.
本発明は、このような問題を解決するためになされたも
ので、プレージングシートを使用せずにプレートフィン
型熱交換器をろう付けする場合において、必要以上のろ
う材の拡散が防止され、孔食を生じることのないろう付
け方法を提供しようとするものである。The present invention was made to solve such problems, and when brazing a plate-fin heat exchanger without using a plating sheet, it prevents the brazing material from spreading more than necessary. The object is to provide a brazing method that does not cause pitting corrosion.
本発明の方法は第１図に示すように、コルゲートフィン
（１）外面の各頂部（ｌａ）・・・に必要最少量のろう
材（４）を付着させた後、セパレートプレート（２）
（２）と組み合わせてろう付け温度に加熱し、一体にろ
う付けすることを特徴とする。As shown in Fig. 1, the method of the present invention is to apply a minimum amount of brazing filler metal (4) to each top (la) of the outer surface of a corrugated fin (1), and then attach a separate plate (2).
It is characterized in that it is combined with (2) and heated to a brazing temperature and brazed together.
本発明法において、コルゲートフィン（１）の外面頂部
（Ｉａ）・・・にろう祠（４）を付着させる手段には、
溶射、ハケによる塗布、あるいは溶融ろう浴面への頂部
（１ａ）浸漬などが考えられるが、付着量を最も正確に
制御できる点から溶射がｔｌｉ奨される。In the method of the present invention, the means for attaching the wax pad (4) to the top (Ia) of the outer surface of the corrugated fin (1) includes:
Thermal spraying, application by brush, or immersion of the top portion (1a) into the molten solder bath surface are possible, but thermal spraying is highly recommended because it allows the most accurate control of the amount of deposition.
ろう材（４）の付着量は、コルゲートフィン（１）の頂
部（ｌａ）形状や曲率半径、熱交換器の耐圧強度等に応
じて変化し、その必要最少量を一概に決定することはで
きないが、第２図（ａ）のように、ろう材（４）が流下
してコルゲートフィン（１）の内面谷部に溜り（４′）
ができたり、頂部（ｌａ）側面に大きく回り込むような
フィレット（５）が形成される場合は、ろう材（４）の
付着量が明らかに過剰である。The amount of brazing filler metal (4) deposited varies depending on the shape of the top (la) of the corrugated fin (1), the radius of curvature, the pressure resistance strength of the heat exchanger, etc., and the required minimum amount cannot be determined unconditionally. However, as shown in Figure 2 (a), the brazing filler metal (4) flows down and accumulates in the inner trough (4') of the corrugated fin (1).
If a fillet (5) is formed that wraps around the sides of the top (la), the amount of brazing filler metal (4) deposited is clearly excessive.
およその目安としては、耐圧力が要求される場合等でセ
パレートプレート（２）の厚さが比較的大きな時は、第
２図（ｂ）のように、頂部（ｌａ）の巾（１）全体に掛
かる巾のフィレット（５）が形成される量を必要最少量
と判定し、反対にセパレートプレート（２）の厚さが比
較的小さい時は、第２図（Ｃ）のように、頂部（１ａ）
の中心部に掛かる巾のフィレット（５）が形成される量
を必要最少量と判定すればよい。一層の確実性を要求す
る場合には、実際にろう付け試験を実施して、ろう材の
流れやろう材成分の母材への拡散状況を調査した上で、
必Ｍｍ少量を決定するのがよい。As a rough guide, when the thickness of the separate plate (2) is relatively large, such as when pressure resistance is required, the entire width (1) of the top part (la) should be The amount that forms a fillet (5) with a width that covers 1a)
The amount by which a fillet (5) having a width spanning the center of the fillet (5) is formed may be determined to be the minimum necessary amount. If you require even greater certainty, conduct an actual brazing test and investigate the flow of the brazing material and the diffusion of brazing material components into the base material.
It is better to determine the required amount of Mm.
ろう材（４）のコルゲーフィン（１）に対する付着力は
、特に窩い強度を必要とせず、熱交換器を組み立てる際
に通常うける衝撃や摩擦に耐え得る程度であればよい。The adhesion force of the brazing filler metal (4) to the corrugated fins (1) does not require particular strength, as long as it can withstand the impact and friction normally experienced when assembling a heat exchanger.
また、セパレートプレート（２）との組み合わせ後行う
ろう付け温度での加熱は、各種の還元性雰囲気炉内また
は真空炉内で行うのがよい。Further, heating at the brazing temperature after combination with the separate plate (2) is preferably performed in various types of reducing atmosphere furnaces or vacuum furnaces.
なお、セパレートプレート（２）との組み合わせに際し
ては、ｉカ記第３回に示したように、コルゲートフィン
（１）の左右側面部にサイドバー（３） （３）力（当
接されるから、コルゲートフィン（１）のスペーサーハ
＝（３） （３）当接箇所か、またはサイドバー（３）
（３）のコルゲートフィン（１）当接箇所にも必要最
少量のろう材（４）を付着させておく必要がある。In addition, when combining with the separate plate (2), as shown in Part 3 of Section I, the side bar (3) (3) force (because it comes into contact with the left and right sides of the corrugated fin (1)) , Spacer of corrugated fin (1) = (3) (3) Contact point or side bar (3)
(3) It is also necessary to attach the required minimum amount of brazing filler metal (4) to the corrugated fin (1) contact area.
コルゲートフィン（１）は前記第３図で示したように、
熱交換器に組み立てた場合、その外面の頂部（ｌａ）・
・・が上下ともセパレートプレート（２） （２）と接
触する。従って、この頂部（１ａ）・・・にだけろう材
（４）を付着させておけば、必要最少量のろう材でセパ
レートプレート（２） （２）との一体ろう付けが可能
である。しかも、ろう材（４）の付着量をコルゲートフ
ィンの形状や曲率、耐圧強度等の製造条件に応して最適
量に調整することにより、ろう材（４）の過剰付着によ
る母材へのシリコンの過拡散が防止される。 従って、
上記拡散を原因とする孔食欠陥をなくすことができる。As shown in FIG. 3, the corrugated fin (1) is
When assembled into a heat exchanger, the top of its outer surface (la)
... contacts the separate plates (2) (2) on both the upper and lower sides. Therefore, by attaching the brazing material (4) only to the top portion (1a), integral brazing with the separate plates (2) (2) is possible with the minimum necessary amount of brazing material. Moreover, by adjusting the amount of the brazing filler metal (4) to the optimum amount according to the manufacturing conditions such as the shape, curvature, and pressure resistance of the corrugated fin, silicon on the base material due to excessive adhesion of the brazing filler metal (4) can be prevented. over-diffusion is prevented. Therefore,
Pitting defects caused by the above-mentioned diffusion can be eliminated.
本発明法に従って、プレートフィン型熱交換器のろう付
けを実施した。Brazing of a plate-fin heat exchanger was carried out according to the method of the present invention.
すなわち、熱交換器はコルゲートフィン、セパレートプ
レート、サイドバーの各部がアルミニウム合金Ａ ３０
０３材で形成され、組み立てた時のサイズが１００ Ｗ
Ｘ ３０ ＨＸ １００ Ｌ（ｍｍ）のものである。In other words, each part of the heat exchanger, including the corrugated fins, separate plates, and side bars, is made of aluminum alloy A30.
Made of 03 material, the assembled size is 100W
The size is 30 H x 100 L (mm).
またコルゲートフィンの厚さは０．１５ｍｍ、セパレ−
ドブレートの厚さは０．３ ｍｍで、熱交換器全体の耐
圧強度は３ ＫｇＦ／ｍｍ２に設定されている。In addition, the thickness of the corrugated fin is 0.15 mm, and the thickness of the corrugated fin is 0.15 mm.
The thickness of the plate is 0.3 mm, and the compressive strength of the entire heat exchanger is set to 3 KgF/mm2.
ろう材の付着手段には不活性雰囲気中での溶射（プラズ
マ溶射式）を採用し、溶射ガンによりコートフィン外面
の各頂部に、シリコン９．５〜１０．５％含をのアルミ
ニウムろう （ＢＡ ｆｆｉ −０） の溶射被膜を
形成した。頂部−個当たりにおける溶射被膜は、平均膜
厚３０μ、中２■耀であった。この付着量は、予め行っ
た試験により上記アルミニウムろうの実際の流れや拡散
状況、形成されたフィレットの巾等を子細に調査して決
定したものである。Thermal spraying in an inert atmosphere (plasma spraying method) is used to attach the brazing material, and a thermal spraying gun is used to apply aluminum solder containing 9.5 to 10.5% silicon to each top of the outer surface of the coat fin. ffi -0) was formed. The sprayed coating on the top part had an average thickness of 30 microns and a medium thickness of 2 microns. This amount of adhesion was determined by carefully examining the actual flow and diffusion of the aluminum solder, the width of the fillet formed, etc. in a test conducted in advance.
溶射皮膜の乾燥後、このコルゲートフィンをセパレート
プレートおよびサイドバーと組み合わせて熱交換器に形
成し、真空炉内にてろう付け加熱を行った。この時の条
件は、加熱保持温度５８０℃。After drying the sprayed coating, the corrugated fins were combined with separate plates and side bars to form a heat exchanger, and brazed and heated in a vacuum furnace. The conditions at this time were a heating and holding temperature of 580°C.
加熱保持時間５分、炉内圧力１０−’Ｔｏｒｒであった
。The heating holding time was 5 minutes, and the furnace pressure was 10-'Torr.
ろう付け完了後、上記熱交換器のろう付け各部を子細に
調査した結果、ろう材の拡散による孔食の発生は全く見
られなかった。また、この熱交換器の耐圧強度を計測し
たところ５ ＫｇＦ／ｍｍ２に耐え、前記設定値を充分
満足していることが判明した。After completion of brazing, each part of the heat exchanger to be brazed was carefully investigated, and as a result, no pitting corrosion due to diffusion of the brazing material was observed. Furthermore, when the pressure resistance of this heat exchanger was measured, it was found that it withstood 5 KgF/mm2, which fully satisfied the set value.
以上に説明したとおり、本発明によれば必要最少量のろ
う［オでプレートフィン型熱交換器をろう付けすること
ができるから、コストが低く、しかも過剰ろう材の拡散
による孔食欠陥のない製品を安定して製造することがで
きる。As explained above, according to the present invention, plate-fin type heat exchangers can be brazed with the minimum necessary amount of solder, thereby reducing costs and eliminating pitting defects caused by diffusion of excess brazing material. Products can be manufactured stably.
第１図は本発明を説明するプレートフィン型熱交換器の
要部拡大断面図、第２図は本発明によるろう材の付着量
を説明する図で、同図（ａ）は過剰状態を示す要部断面
図、同図（ｂ）はセパレートプレートの厚さが大きい場
合の必要最少量を示す要部断面図、同図（Ｃ）はセパレ
ートプレー１・の厚さが小さい場合の必要最少量を示す
要部断面図、第３図は一般的なプレートフィン型熱交換
器の構造を説明する分解斜視図である。
ｌニコルゲートフィン、１ａ：頂部、２：セパレートプ
レート、３：サイドバー、４：ろう材、５：フィレットFig. 1 is an enlarged sectional view of the main part of a plate-fin type heat exchanger to explain the present invention, Fig. 2 is a diagram to explain the amount of brazing filler metal deposited according to the present invention, and (a) of the same figure shows an excessive state. A cross-sectional view of the main part, (b) is a cross-sectional view of the main part showing the minimum amount required when the thickness of the separate plate is large, and (C) is a cross-sectional view of the main part showing the minimum amount required when the thickness of the separate plate 1 is small. FIG. 3 is an exploded perspective view illustrating the structure of a general plate-fin type heat exchanger. l Nicol gate fin, 1a: top, 2: separate plate, 3: side bar, 4: brazing metal, 5: fillet
Claims (1)
う材を付着させた後、セパレートプレートと組み合わせ
てろう付け温度に加熱し、一体にろう付けすることを特
徴とするプレートフィン型熱交換器のろう付け方法。(1) A plate-fin type heat exchanger characterized by attaching the minimum necessary amount of brazing filler metal to each top of the outer surface of the corrugated fins, then combining with separate plates, heating to brazing temperature, and brazing them together. brazing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5888986A JPS62214865A (en) | 1986-03-17 | 1986-03-17 | Brazing method for plate fin type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5888986A JPS62214865A (en) | 1986-03-17 | 1986-03-17 | Brazing method for plate fin type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62214865A true JPS62214865A (en) | 1987-09-21 |
Family
ID=13097350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5888986A Pending JPS62214865A (en) | 1986-03-17 | 1986-03-17 | Brazing method for plate fin type heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62214865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112007000992B4 (en) | 2006-04-28 | 2013-01-10 | Kabushiki Kaisha Toyota Chuo Kenkyusho | A method of soldering a first metal element to a second metal element using a highly wettable metal as a layer between the two metal elements; Reformer produced by this method, wherein the metal elements may have grooves |
| CN109641297A (en) * | 2016-09-01 | 2019-04-16 | 林德股份公司 | For manufacturing the method with the plate heat exchanger block for the brazing material being targetedly applied on especially fin and strip of paper used for sealing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731469A (en) * | 1980-07-31 | 1982-02-19 | Kobe Steel Ltd | Manufacture of material for aluminium alloy brazing |
| JPS5731468A (en) * | 1980-07-31 | 1982-02-19 | Kobe Steel Ltd | Brazed structure made of aluminum |
-
1986
- 1986-03-17 JP JP5888986A patent/JPS62214865A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731469A (en) * | 1980-07-31 | 1982-02-19 | Kobe Steel Ltd | Manufacture of material for aluminium alloy brazing |
| JPS5731468A (en) * | 1980-07-31 | 1982-02-19 | Kobe Steel Ltd | Brazed structure made of aluminum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112007000992B4 (en) | 2006-04-28 | 2013-01-10 | Kabushiki Kaisha Toyota Chuo Kenkyusho | A method of soldering a first metal element to a second metal element using a highly wettable metal as a layer between the two metal elements; Reformer produced by this method, wherein the metal elements may have grooves |
| CN109641297A (en) * | 2016-09-01 | 2019-04-16 | 林德股份公司 | For manufacturing the method with the plate heat exchanger block for the brazing material being targetedly applied on especially fin and strip of paper used for sealing |
| JP2019529117A (en) * | 2016-09-01 | 2019-10-17 | リンデ アクチエンゲゼルシャフトＬｉｎｄｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | In particular, a method of manufacturing a plate-type heat exchanger block by applying a brazing material to fins and side bars as intended. |
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