JPH10296432A - High frequency brazing method - Google Patents

High frequency brazing method

Info

Publication number
JPH10296432A
JPH10296432A JP11482797A JP11482797A JPH10296432A JP H10296432 A JPH10296432 A JP H10296432A JP 11482797 A JP11482797 A JP 11482797A JP 11482797 A JP11482797 A JP 11482797A JP H10296432 A JPH10296432 A JP H10296432A
Authority
JP
Japan
Prior art keywords
pipe
brazing
main body
connecting cylinder
accumulator
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
Application number
JP11482797A
Other languages
Japanese (ja)
Inventor
Keiji Matsumoto
圭司 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP11482797A priority Critical patent/JPH10296432A/en
Publication of JPH10296432A publication Critical patent/JPH10296432A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a high frequency brazing method to prevent a converged part from overheating/damaging and to braze a connecting cylinder part and a tube well when high frequency brazing a first metal tube, which consists of a main body part of round shape in cross section, a thin conical trapezoid converged part continued to the main body with diameter reduced in tapering off more to tip and a connecting cylinder part protruded in the axial direction to a tip of the converged part, to a second metal tube. SOLUTION: The method is applicable to a first tube 1, which consists of a main body part 11 of round shape in cross section, thin conical trapizoid converged parts 12a, 12b continued to the main body 11 with diameter reduced in tapering off more to tip and connecting cylinder parts 13a, 13b protruded to a tip of the converged part in the axial direction, and in which an angle θand between the connecting cylinder part and a connecting part 16 of the converged part is <=150 deg.. Further, lengths L1, L2 of the connecting cylinder parts 13a, 13b are set at >=10 mm.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、例えば金属製ア
キュームレータに金属製パイプをろう付する場合等に用
いられる高周波ろう付方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency brazing method used for brazing a metal pipe to a metal accumulator, for example.

【0002】[0002]

【従来の技術】例えばカーエアコン、ルームエアコン等
の冷凍サイクル装置に用いられるアルミニウム(その合
金を含む)製のアキュームレータは、一般に図6及び図
7に示すように、断面円形の本体部(51)と、該本体
部(51)に連続して先細り状に縮径された薄肉の絞り
部(52)と、該絞り部(52)の先端に軸線方向に突
出した接続筒部(53)とを備えている。
2. Description of the Related Art For example, an accumulator made of aluminum (including its alloy) used for a refrigeration cycle device such as a car air conditioner or a room air conditioner generally has a main body (51) having a circular cross section as shown in FIGS. And a thin-walled narrowed portion (52) that has a tapered diameter that is continuous with the main body portion (51); and a connection cylinder portion (53) that protrudes in the axial direction at the tip of the narrowed portion (52). Have.

【0003】このようなアルミニウム製アキュームレー
タ(50)の前記接続筒部(53)に冷媒流通用の例え
ばアルミニウムパイプ(60)が接合されるが、このよ
うな接合方法としては、従来、ティグ溶接やガスろう付
法が専ら用いられていた。
[0003] For example, an aluminum pipe (60) for flowing a refrigerant is joined to the connecting tubular portion (53) of such an aluminum accumulator (50). Gas brazing was used exclusively.

【0004】ところが、上記のようなティグ溶接は、母
材を溶かして肉盛りするためピンホールが出やすく、こ
のため作業に熟練を要するとか、接合部の内面にバリを
生じて冷媒等の円滑な流通を妨げる等の問題を生じる恐
れがあった。このために、図6に示すように、アキュー
ムレータ(50)の前記接続筒部(53)とアルミニウ
ムパイプ(60)との接合部の内側にSUS等からなる
鍔(71)付きの短筒状継手パイプ(70)を、接続筒
部(53)とアルミニウムパイプ(60)のそれぞれの
端面が鍔部(71)に当接するまで挿入し、該継手パイ
プ(70)を介在した状態で溶接を行う必要があった。
このため、継手パイプ(70)が必要でコスト高となっ
ていた。
[0004] However, in the above-described TIG welding, a pinhole is liable to be formed because the base material is melted and built up, so that skill is required for the operation, or burrs are generated on the inner surface of the joint portion, so that the coolant or the like is smoothly formed. There is a possibility that problems such as hindering proper distribution may occur. For this purpose, as shown in FIG. 6, a short tubular joint having a flange (71) made of SUS or the like inside the joint between the connecting tubular portion (53) of the accumulator (50) and the aluminum pipe (60). It is necessary to insert the pipe (70) until the respective end faces of the connecting tubular part (53) and the aluminum pipe (60) come into contact with the flange part (71), and perform welding with the joint pipe (70) interposed. was there.
For this reason, the joint pipe (70) is required and the cost is increased.

【0005】また、アキュームレータ(50)の本体部
(51)の内部へパイプを導く必要がある場合には、図
7に示すように、接続筒部(53)に内部パイプ(8
0)を嵌め込んだうえで、該内部パイプ(80)とアル
ミニウムパイプ(60)の両パイプに跨がって短筒状継
手パイプ(70)を介在させており、このため継手パイ
プ(70)の他に内部パイプ(80)が必要になるとい
う欠点もあった。
If it is necessary to guide the pipe into the main body (51) of the accumulator (50), as shown in FIG. 7, an internal pipe (8) is connected to the connecting cylinder (53).
0), and a short tubular joint pipe (70) is interposed across both the internal pipe (80) and the aluminum pipe (60). In addition, there is a disadvantage that an internal pipe (80) is required.

【0006】一方また、ガスろう付法では次のような欠
点があった。即ち、アルミニウム材をろう付する場合、
ろう材の融点よりも高く母材の融点よりも低い温度に加
熱する必要があるが、ろう材の融点と母材の融点とが接
近しているため、ろう付加熱温度の許容範囲は約40℃
程度と極めて狭い。しかるに、ガスろう付法では、ガス
輻射熱の影響からろう付温度を上記温度範囲に納めるの
が容易でないうえ均一加熱が難しく、従って良好なろう
付を行うためには熟練を要求されるという欠点があっ
た。
On the other hand, the gas brazing method has the following disadvantages. That is, when brazing aluminum material,
It is necessary to heat to a temperature higher than the melting point of the brazing material and lower than the melting point of the base material. However, since the melting point of the brazing material and the melting point of the base material are close to each other, the allowable range of the additional heat temperature of the brazing material is about 40. ° C
Extremely narrow with degree. However, the gas brazing method has a drawback that it is not easy to keep the brazing temperature within the above temperature range due to the influence of gas radiant heat, and it is difficult to uniformly heat the brazing temperature. Therefore, skill is required to perform good brazing. there were.

【0007】そこで、ティグ溶接やガスろう付に代え
て、高周波誘導コイルを用いてアキュームレータとパイ
プとを高周波ろう付することが提案されている。
Therefore, instead of TIG welding or gas brazing, high-frequency brazing of an accumulator and a pipe using a high-frequency induction coil has been proposed.

【0008】[0008]

【発明が解決しようとする課題】しかしながら、このよ
うな高周波ろう付により、アキュームレータの接続筒部
にアルミニウムパイプを挿入してろう付した場合、アキ
ュームレータの絞り部が過熱状態となり、甚しくは絞り
部が溶けるというような問題があることが判明した。
However, when an aluminum pipe is inserted into the connecting cylinder portion of the accumulator and brazed by such high-frequency brazing, the throttle portion of the accumulator is overheated, and the throttle portion is extremely deteriorated. It turned out that there was a problem such as melting.

【0009】このような欠点は、アルミニウム製のアキ
ュームレータとパイプを高周波ろう付する場合のみなら
ず、銅その他の金属からなるアキュームレータとパイプ
との高周波ろう付においても同様に生じるものであっ
た。
Such a drawback arises not only in the case of high-frequency brazing of an aluminum accumulator and a pipe, but also in the case of high-frequency brazing of an accumulator made of copper or other metal and a pipe.

【0010】この発明は、かかる技術的背景に鑑みてな
されたものであって、断面円形の本体部と、該本体部に
連続して先細り状に縮径された絞り部と、該絞り部の先
端に突出した接続筒部とを備えた金属製の第1のパイプ
の前記接続筒部に金属製の第2のパイプを高周波ろう付
する場合に、絞り部の過熱損傷を防止して、接続筒部と
パイプとを良好にろう付することができるろう付方法の
提供を目的とする。
The present invention has been made in view of such a technical background, and has a main body having a circular cross section, a constricted portion that is tapered continuously to the main body, and a constricted portion. When high-frequency brazing a metal second pipe to the metal connection pipe of the metal first pipe provided with a connection pipe part protruding at the tip, it is possible to prevent overheating damage to the narrowed portion and connect the metal pipe. An object of the present invention is to provide a brazing method capable of satisfactorily brazing a tubular portion and a pipe.

【0011】[0011]

【課題を解決するための手段】発明者は、上記のような
アキュームレータの絞り部の過熱損傷が発生する原因に
ついて鋭意研究した結果、次のようなことを知見した。
Means for Solving the Problems The inventor of the present invention has conducted intensive studies on the cause of the above-described overheat damage to the throttle portion of the accumulator, and found the following.

【0012】即ち、金属製アキュームレータは一般に、
パイプ状部材にへら絞り等を施すことにより絞り部が形
成されるが、この絞り部は本体部に比べて伸びを生じて
薄肉になっている。このため、アキュームレータの接続
筒部にパイプを挿入して接続筒部の周囲に高周波誘導コ
イルを配置し、高周波誘導加熱を行った場合、コイルに
よる加熱範囲が薄肉の絞り部にまで及んで、該絞り部が
過度の温度上昇を来していることがわかった。
That is, a metal accumulator is generally
The drawn portion is formed by applying a spatula or the like to the pipe-shaped member, and the drawn portion is elongated and thinner than the main body. For this reason, when a high-frequency induction coil is arranged around the connection cylinder by inserting a pipe into the connection cylinder of the accumulator and high-frequency induction heating is performed, the heating range of the coil extends to the thin-walled narrowed part, and It was found that the temperature of the throttle portion was excessively increased.

【0013】そして、このような絞り部の温度上昇は、
接続筒部と絞り部の連接部分のなす角度θが150度以
下である場合に、特に著しいものであった。
[0013] Such a temperature rise in the throttle section is caused by
This is particularly remarkable when the angle θ formed by the connecting portion between the connection cylinder and the throttle is 150 degrees or less.

【0014】この発明は、このような知見に基づいてな
されたものであり、断面円形の本体部と、該本体部に連
続して先細り状に縮径された薄肉の円錐台形状の絞り部
と、該絞り部の先端に軸線方向に突出した接続筒部とを
備え、接続筒部と絞り部の連接部分のなす角度θが15
0度以下である金属製の第1のパイプを対象とし、該第
1のパイプの前記接続筒部に、金属製の第2のパイプを
高周波ろう付する方法であって、前記第1のパイプの接
続筒部の長さL1、L2が、10mm以上に設定されて
なることを特徴とするものである。
The present invention has been made based on such knowledge, and has a main body having a circular cross section, and a thin frustoconical narrowed portion which is tapered and reduced in diameter continuously to the main body. An axially protruding connecting cylinder at the tip of the constricted portion, and the angle θ formed by the connecting portion of the connecting cylinder and the constricted portion is 15
A method for high-frequency brazing a metal second pipe to the connecting pipe portion of the first pipe, wherein the first pipe is made of a metal having a temperature of 0 degrees or less. Characterized in that the lengths L1 and L2 of the connecting cylinders are set to 10 mm or more.

【0015】このように、第1のパイプの接続筒部の長
さL1、L2が10mm以上に設定されてなることによ
り、接続筒部と絞り部の連接部分のなす角度θが150
度以下であっても、接続筒部の周囲に配置される高周波
誘導コイルにより加熱される接続部の位置が絞り部から
遠くなるとともに、高周波誘導コイルと絞り部との距離
は離間し、絞り部に及ぼされる熱的影響が少なくなり、
絞り部の過熱損傷が抑制される。
As described above, since the lengths L1 and L2 of the connecting pipe portions of the first pipe are set to 10 mm or more, the angle θ formed by the connecting portion between the connecting pipe portion and the constricted portion is 150 mm.
Degree or less, the position of the connection portion heated by the high-frequency induction coil disposed around the connection cylinder portion is far from the throttle portion, and the distance between the high-frequency induction coil and the throttle portion is separated, and the throttle portion is The thermal effect on the
Overheat damage of the narrowed portion is suppressed.

【0016】[0016]

【発明の実施の形態】次に、この発明の一実施形態を図
1〜4を参照しつつ説明する。
Next, an embodiment of the present invention will be described with reference to FIGS.

【0017】図1〜図3において、(1)は第1の金属
製パイプとしてのアルミニウム製のアキュームレータで
あり、長さ方向の中間部に径大の本体部(11)を備え
ると共に、本体部(11)の両端に連続して先細り状に
縮径された円錐台形状の絞り部(12a)(12b)が
それぞれ形成され、さらに各絞り部(12a)(12
b)の先端には、軸線方向に突出する細径直管状の接続
筒部(13a)(13b)が形成されている。このアキ
ュームレータ(1)は、パイプ状アルミニウム材をヘラ
絞り成形することにより絞り部(12a)(12b)を
形成したものであり、従って絞り部(12a)(12
b)はへら絞りによる伸びのため本体部(11)に比べ
て薄肉となっている。
In FIG. 1 to FIG. 3, (1) is an aluminum accumulator as a first metal pipe, which is provided with a large-diameter main body (11) at an intermediate portion in a longitudinal direction and a main body. Conical frusto-conical apertures (12a) and (12b), each of which has a tapered diameter, are formed at both ends of (11), respectively, and further, each aperture (12a) (12)
At the tip of b), there is formed a small-diameter straight tubular connecting tubular portion (13a) (13b) projecting in the axial direction. The accumulator (1) is obtained by forming drawn portions (12a) and (12b) by spatula drawing of a pipe-shaped aluminum material.
b) is thinner than the main body part (11) due to elongation caused by the spatula drawing.

【0018】前記アキュームレータ(1)において、図
1及び図3に示すように、接続筒部(13a)(13
b)と絞り部(12a)(12b)の連接部分(16)
のなす角度θは150度以下の急勾配に設定されてい
る。
In the accumulator (1), as shown in FIGS. 1 and 3, connecting cylinders (13a) (13)
b) and the connecting portion (16) between the squeezed portions (12a) and (12b)
Is set to a steep slope of 150 degrees or less.

【0019】一方また、各接続筒部(13a)(13
b)の長さL1、L2は10mm以上に設定されてい
る。接続筒部(13a)(13b)の長さL1、L2が
10mm未満では、該接続筒部(13a)(13b)の
長さが短かすぎるため、高周波過熱ろう付時に高周波誘
導コイルと絞り部(12a)(12b)との距離が縮ま
り、コイルの作用が薄肉の絞り部(12a)(12b)
まで及んで該絞り部が過熱状態となり、熱的損傷を生じ
る恐れがある。特に好ましくは15mm以上に設定する
のが良い。なお、接続筒部(13a)(13b)の長さ
が長すぎても過熱防止の観点からは無駄であるととも
に、アキュームレータ(1)の製作上及び使用上の要請
に対応できないことから、接続筒部(13a)(13
b)の長さは20mm以下に設定するのが実用的であ
る。
On the other hand, each connecting cylinder (13a) (13
b) The lengths L1 and L2 are set to 10 mm or more. If the lengths L1 and L2 of the connecting cylinders (13a) and (13b) are less than 10 mm, the lengths of the connecting cylinders (13a) and (13b) are too short. The distance between (12a) and (12b) is reduced, and the action of the coil is reduced in the thickness of the narrowed portion (12a) (12b).
As a result, the throttle portion may be overheated, causing thermal damage. It is particularly preferable to set it to 15 mm or more. It should be noted that if the lengths of the connecting cylinder portions (13a) and (13b) are too long, they are useless from the viewpoint of preventing overheating, and cannot meet the demands in manufacturing and using the accumulator (1). Part (13a) (13
It is practical to set the length of b) to 20 mm or less.

【0020】なお、接続筒部(13a)(13b)と絞
り部(12a)(12b)との連接部(16)のなす角
度θが150度を超える場合には、絞り部(12a)
(12b)の傾斜が緩くなって高周波誘導コイルと絞り
部とが離間するため、ろう付時にコイルの影響が絞り部
に及びにくくなる。このため、接続筒部(13a)(1
3b)の長さL1、L2が10mm未満の例えば8mm
であっても、絞り部の熱的損傷を生じにくく、本発明の
適用意義に欠ける。このため、本発明では、接続筒部
(13a)(13b)と絞り部(12a)(12b)の
連接部分(16)のなす角度θが150度以下のものを
対象とする。
If the angle θ formed by the connecting portion (16) between the connecting cylindrical portions (13a) (13b) and the converging portions (12a) (12b) exceeds 150 degrees, the converging portion (12a)
Since the inclination of (12b) becomes gentle and the high-frequency induction coil is separated from the narrowed portion, the influence of the coil during brazing is less likely to reach the narrowed portion. For this reason, the connecting cylinder (13a) (1
3b) Lengths L1 and L2 are less than 10 mm, for example, 8 mm
However, thermal damage to the narrowed portion hardly occurs, and the application of the present invention is lacking. For this reason, in the present invention, an object in which the angle θ formed by the connecting portion (16) of the connection cylinder portions (13a) (13b) and the constricted portions (12a) (12b) is 150 degrees or less.

【0021】なお、絞り部(12a)(12b)が円錐
台形状ではなく、図5に示すように断面円弧状をなす場
合であっても、接続筒部(13a)(13b)と絞り部
(12a)(12b)との連接部(16)のなす角度θ
が150度以下である限り、本発明が適用されることは
いうまでもない。
It should be noted that even if the narrowed portions (12a) and (12b) are not in the shape of a truncated cone, but have an arc-shaped cross section as shown in FIG. 5, the connecting tubular portions (13a) and (13b) and the narrowed portion ( 12a) The angle θ formed by the connecting portion (16) with (12b)
It is needless to say that the present invention is applied as long as the angle is not more than 150 degrees.

【0022】図1〜図3において、(2a)(2b)は
第2の金属製パイプとしてのアルミニウム製パイプであ
り、前記アキュームレータ(1)の接続筒部(13a)
(13b)に挿入されるとともに、該接続筒部(13
a)(13b)にろう付されるものである。このアルミ
ニウムパイプ(2a)(2b)の接続筒部(13a)
(13b)への挿入状態において、図3のように、内側
パイプ(2)の外周面と接続筒部(13a)(13b)
の内周面との間にはろう材(3)の浸透充填用の隙間
(4)が生じるが、この隙間(4)の大きさは0.1〜
0.3mmに設定するのが好ましい。隙間(4)の大き
さが0.1mm未満ではろう付時に接合部が加熱されす
ぎ、逆に0.3mmを超える場合には加熱が不足して、
いずれの場合も良好なろう付をおこなうことができな
い。
In FIGS. 1 to 3, (2a) and (2b) denote aluminum pipes as second metal pipes, and a connecting tubular portion (13a) of the accumulator (1).
(13b) and the connection tube (13)
a) It is to be brazed to (13b). Connection tube part (13a) of this aluminum pipe (2a) (2b)
In the state of being inserted into (13b), as shown in FIG. 3, the outer peripheral surface of the inner pipe (2) and the connecting tubular portions (13a) (13b)
A gap (4) for infiltration and filling of the brazing material (3) is formed between the gap and the inner peripheral surface, and the size of the gap (4) is 0.1 to
Preferably, it is set to 0.3 mm. If the size of the gap (4) is less than 0.1 mm, the joint is excessively heated during brazing, and if it exceeds 0.3 mm, the heating is insufficient.
In any case, good brazing cannot be performed.

【0023】上記のようなアキュームレータ(1)の接
続筒部(13a)(13b)とアルミニウムパイプ(2
a)(2b)の高周波ろう付は次のようにして行う。即
ち、図3(イ)に示すように、一方の接続筒部(13
a)に、アルミニウムパイプ(2a)をその先端がアキ
ュームレータ(1)の本体部(11)の内部に達するま
で行う。挿入に先立ち、アルミニウムパイプ(2a)の
端部に、リング状ろう材(3)を容易に移動しないよう
に圧接状態に嵌め込んでおき、またフラックスを塗布
し、該ろう材(3)が接続筒部(13a)の開口部周縁
に当接するまで挿入すれば良い。こうすることで、ろう
材を位置決め部材としても機能させることができる。な
お、ろう材(3)としてはAl−Si系合金からなるも
の等を用いれば良い。また、接続筒部(13a)の開口
部周縁(14)は、予め内向き傾斜状に面取りされてお
り、ろう付時に、ろう材充填用隙間(4)へのろう材
(3)の流れ込みを促進し得るものとなされている。
The connecting cylinders (13a) (13b) of the accumulator (1) and the aluminum pipe (2)
a) The high frequency brazing of (2b) is performed as follows. That is, as shown in FIG.
In (a), the aluminum pipe (2a) is used until its tip reaches the inside of the main body (11) of the accumulator (1). Prior to insertion, a ring-shaped brazing material (3) is fitted into the end of the aluminum pipe (2a) in a press-contact state so as not to be easily moved, and a flux is applied, and the brazing material (3) is connected. It may be inserted until it comes into contact with the periphery of the opening of the cylindrical portion (13a). This allows the brazing material to function as a positioning member. The brazing material (3) may be made of an Al-Si alloy. In addition, the peripheral edge (14) of the opening of the connecting cylinder (13a) is chamfered in an inwardly inclined shape in advance to prevent the brazing material (3) from flowing into the brazing filler gap (4) during brazing. It can be promoted.

【0024】次に、パイプ(2a)を挿入した状態で、
ろう材充填用隙間(4)の大きさがパイプ(2a)の周
方向において均一になるように固定治具でしっかりと固
定する。ろう材充填用隙間(4)の大きさが周方向にお
いて不均一であると、加熱状態も不均一になり、良好な
ろう付状態を得ることができない。
Next, with the pipe (2a) inserted,
The fixing jig is firmly fixed so that the size of the brazing filler gap (4) is uniform in the circumferential direction of the pipe (2a). If the size of the brazing filler gap (4) is not uniform in the circumferential direction, the heating state is also uneven, and a good brazing state cannot be obtained.

【0025】次に、図4に示すように、接合すべき接続
筒部(13a)ないしその近傍部位に高周波誘導コイル
(20)を配置して、接続筒部(13a)及びパイプ
(2a)を高周波誘導加熱する。高周波誘導加熱方式
は、高周波電流を通ずるコイル内に接合部を置き、接続
筒部(13a)及びアルミニウムパイプ(2a)に発生
する渦電流により加熱する方式である。ここに、使用コ
イル(20)は環状コイルでも勿論良いが、環状コイル
ではアルミニウムパイプをコイル内に通す必要があるこ
とから、長尺もののパイプについてはその作業が厄介で
ある。また、環状コイルの一部分を閉じ合わせ開放可能
な左右分割式に構成したものでは、構造が複雑となる。
そこで、好ましくは、構造簡易で長尺パイプのろう付も
簡単に行うことができかつ加熱効率も良いコイルとし
て、図4に示すような馬蹄形コイル(10)を採用する
のが良い。
Next, as shown in FIG. 4, a high-frequency induction coil (20) is arranged at or near the connection cylinder (13a) to be joined, and the connection cylinder (13a) and the pipe (2a) are connected. High frequency induction heating. The high-frequency induction heating method is a method in which a joining portion is placed in a coil through which a high-frequency current passes, and heating is performed by eddy current generated in the connecting cylinder (13a) and the aluminum pipe (2a). Here, the coil (20) to be used may be an annular coil, but it is necessary to pass an aluminum pipe through the coil in the annular coil. Further, in the case where a part of the annular coil is formed in a left-right split type which can be closed and opened, the structure becomes complicated.
Therefore, it is preferable to adopt a horseshoe-shaped coil (10) as shown in FIG. 4 as a coil that has a simple structure, can easily braze a long pipe, and has good heating efficiency.

【0026】即ち、図4において(20)は出力コイル
であり、該コイルは表面をセラミックコーティングによ
り絶縁した銅製の断面円形パイプを正面視逆U形、側面
視U形に2ターンにわたって曲成してなるものである。
なお、図示実施例ではコイル(20)を断面円形パイプ
で構成した場合を示したが、断面角形パイプでも良い。
また、2往復曲成した2ターンのものを示したが、1往
復のみのものや3往復以上にわたって曲成したものであ
っても良い。
That is, in FIG. 4, reference numeral 20 denotes an output coil, which is formed by bending a copper circular pipe having a surface insulated by a ceramic coating into an inverted U shape in a front view and a U shape in a side view for two turns. It is.
In the illustrated embodiment, the case where the coil (20) is constituted by a pipe having a circular cross section is shown, but a pipe having a rectangular cross section may be used.
In addition, although a two-turn configuration having two reciprocations is shown, a one-return configuration or a three-return configuration may be used.

【0027】このような馬蹄型コイル(20)を使用す
る場合に、本発明の効果が特に大きい。つまり、馬蹄型
コイル(20)では、図4に示すように、大きな出力を
確保するためには、アキュームレータ(1)やアルミニ
ウムパイプ(2a)の長さ方向におけるコイルの幅Wが
大きくならざるを得ず、このためコイル(20)の端部
が絞り部(12a)(12b)に接近しやすいためであ
る。
When such a horseshoe-shaped coil (20) is used, the effect of the present invention is particularly large. That is, in the horseshoe coil (20), as shown in FIG. 4, in order to secure a large output, the width W of the coil in the length direction of the accumulator (1) or the aluminum pipe (2a) must be large. This is because the end of the coil (20) can easily approach the narrowed portions (12a) (12b).

【0028】上記コイル(20)をそのワーク保持空間
(22)に接続筒部(13a)及びろう材(3)が位置
するようにセットしたのち、コイル(20)に高周波電
流を流し、接続筒部(13a)及びその近傍を発熱させ
る。加熱温度(ろう付温度)は、一般には600〜62
0℃程度に設定される。加熱温度が上記のような温度と
なるように、接合部の温度を放射温度計(図示せず)等
により監視して温度制御を行いながら、高周波誘導加熱
方式による加熱を行う。加熱によりリング状ろう材
(3)は溶融し、毛管現象により内側パイプ(2a)と
外側の接続筒部(13a)との間のろう材充填用隙間
(4)に浸透充填する。
After the coil (20) is set so that the connection cylinder (13a) and the brazing material (3) are located in the work holding space (22), a high-frequency current is passed through the coil (20), The portion (13a) and its vicinity are heated. The heating temperature (brazing temperature) is generally 600 to 62.
It is set to about 0 ° C. The heating by the high-frequency induction heating method is performed while controlling the temperature by monitoring the temperature of the joint with a radiation thermometer (not shown) or the like so that the heating temperature becomes the above-mentioned temperature. The ring-shaped brazing material (3) is melted by heating, and penetrates and fills the brazing filler gap (4) between the inner pipe (2a) and the outer connecting cylinder (13a) by capillary action.

【0029】また、アキュームレータ(1)の接続筒部
(13a)の長さL1は10mm以上に設定されている
から、高周波コイル(20)を絞り部(12a)から従
来よりも離間した位置に接続筒部(13a)に沿って配
置でき、従って本体部(11)に比べて相対的に薄肉な
絞り部(12a)にコイル(20)による誘導作用が及
ぶのを可及的に抑制でき、絞り部(12a)が過熱状態
となることはない。
Further, since the length L1 of the connecting cylindrical portion (13a) of the accumulator (1) is set to 10 mm or more, the high-frequency coil (20) is connected to a position more distant from the throttle portion (12a) than in the prior art. It can be arranged along the cylindrical portion (13a), and therefore, it is possible to suppress as much as possible the induction action of the coil (20) on the throttle portion (12a) which is relatively thinner than the main body portion (11). The part (12a) does not become overheated.

【0030】加熱終了後においては、接合部は徐々に冷
却し、ろう材充填用隙間(4)に充填した溶融ろう材も
冷却固化し、接続筒部(13a)とパイプ(2a)が良
好に接合される。
After the completion of the heating, the joint portion is gradually cooled, and the molten brazing material filled in the brazing filler gap (4) is solidified by cooling, so that the connecting tubular portion (13a) and the pipe (2a) are satisfactorily cooled. Joined.

【0031】一方、他の接続筒部(13b)について
は、図3(ロ)に示すように、接続筒部(13b)の内
面に係止段部(15)が形成され、この係止段部(1
5)にパイプ(2b)の端面が当接係止するまでパイプ
(2b)を接続筒部(13b)に挿入して高周波ろう付
を行う。接続筒部(13b)に係止段部(15)を設け
てこれにパイプ(2b)を係止させる点以外は、前記し
た一方の接続筒部(13a)とパイプ(2a)のろう付
と同様であるので、詳細な説明は省略する。
On the other hand, as shown in FIG. 3B, a locking step (15) is formed on the inner surface of the connecting cylinder (13b) for the other connecting cylinder (13b). Department (1
5) Insert the pipe (2b) into the connecting cylinder (13b) until the end face of the pipe (2b) abuts and locks to perform high-frequency brazing. Except that the connecting cylinder (13b) is provided with a locking step (15) and the pipe (2b) is locked therewith, the above-mentioned brazing of the connecting cylinder (13a) and the pipe (2a) is performed. Since it is the same, detailed description is omitted.

【0032】ちなみに、本体部(11)の外径:30m
m、肉厚:1mm、円錐台形状の絞り部(12a)の肉
厚:0.8mm、接続筒部(13a)の外径:10.4
mm、肉厚:1mm、長さL1:16mm、接続筒部
(13a)と絞り部(12a)との連接部分(16)の
角度θ:135度に設定されたJIS6061Al製の
アキュームレータ(1)の前記接続筒部(13a)に、
肉厚0.8mm、外径9.0mmのJIS6061Al
からなるパイプ(2a)の端部を、その先端が本体部
(11)の内部に達するまで挿入した。
Incidentally, the outer diameter of the main body (11): 30 m
m, wall thickness: 1 mm, wall thickness of frusto-conical narrowed portion (12a): 0.8 mm, outer diameter of connection tube portion (13a): 10.4
mm, wall thickness: 1 mm, length L: 16 mm, accumulator (1) made of JIS6061Al set at 135 °, the angle θ of the connecting portion (16) between the connection tube portion (13a) and the throttle portion (12a). In the connection tube portion (13a),
JIS6061Al with 0.8mm wall thickness and 9.0mm outer diameter
Of the pipe (2a) was inserted until the tip reached the inside of the main body (11).

【0033】なお、接続筒部(13a)の開口部周縁
(14)は内向き傾斜状に予め面取りしておくととも
に、パイプ(2a)の挿入側端部の所定位置には、Al
−Si系ろう材からなる直径1.6mmのリング状置き
ろう材(3)を周面圧接状態に強嵌しておき、接合部に
フッ化物系フラックスを塗布したのち、前記ろう材
(3)が接続筒部(13a)の開口周縁(14)に当接
するまで挿入した。
The periphery (14) of the opening of the connecting cylinder (13a) is chamfered in advance in an inwardly inclined shape, and a predetermined position of the insertion side end of the pipe (2a) is
A ring-shaped brazing material (3) having a diameter of 1.6 mm made of a Si-based brazing material is tightly fitted in a circumferentially pressed state, and after applying a fluoride-based flux to the joint, the brazing material (3) is used. Until it comes into contact with the peripheral edge (14) of the opening of the connecting cylinder (13a).

【0034】そして、内側パイプ(2a)の外周面と接
続筒部(13a)の内周面との間のろう材充填用隙間
(4)(大きさは0.2mm)が均一になるようにアキ
ュームレータ(1)及びパイプ(2a)をしっかりと位
置決め固定した。
Then, the gap (4) (0.2 mm in size) for filling the brazing filler metal between the outer peripheral surface of the inner pipe (2a) and the inner peripheral surface of the connecting tubular portion (13a) is made uniform. The accumulator (1) and the pipe (2a) were firmly positioned and fixed.

【0035】次いで、出力コイル(20)のワーク保持
空間(21)内に接続筒部(13a)及びろう材(3)
が位置するように、出力コイル(20)をセットした。
なお、コイル(20)は外径5mmの銅パイプを図4に
示すように馬蹄型に2ターン曲成したものを用い、全体
の長さW:26mm、幅X:28mm、高さH:35m
mに設定した。
Next, in the work holding space (21) of the output coil (20), the connecting cylinder (13a) and the brazing material (3) are placed.
The output coil (20) was set so that was positioned.
As the coil (20), a copper pipe having an outer diameter of 5 mm and having a horseshoe shape formed by two turns as shown in FIG. 4 was used, and the overall length W was 26 mm, the width X was 28 mm, and the height H was 35 m.
m.

【0036】そして、放射線温度計を用いて接合部の温
度を監視しつつ接合部を高周波誘導加熱した。加熱は、
ろう付温度範囲(610℃±10℃)に対して620℃
の温度に設定して行った。
Then, while monitoring the temperature of the joined portion using a radiation thermometer, the joined portion was subjected to high-frequency induction heating. Heating is
620 ℃ for brazing temperature range (610 ℃ ± 10 ℃)
The temperature was set at

【0037】ろう付後アキュームレータ(1)の絞り部
(12a)を観察したところ、熱的な影響は認められな
かった。
Observation of the narrowed portion (12a) of the accumulator (1) after brazing revealed no thermal effect.

【0038】これに対し、アキュームレータ(1)の接
続筒部(13a)の長さL1を8mmに設定した以外
は、上記と同様にして出力コイル(20)をセットした
ところ、出力コイル(20)の絞り部側の端部が絞り部
(12a)に接近しすぎていた。そして、上記と同一の
条件でろう付を行ったところ、絞り部(12a)の一部
が溶融して孔の発生が認められた。
On the other hand, when the output coil (20) was set in the same manner as described above except that the length L1 of the connecting cylinder (13a) of the accumulator (1) was set to 8 mm, the output coil (20) Was too close to the squeezed portion (12a). Then, when brazing was performed under the same conditions as above, a part of the narrowed portion (12a) was melted and generation of holes was recognized.

【0039】なお、以上の実施形態においては、アキュ
ームレータ(1)やパイプ(2a)(2b)としてアル
ミニウム製のものを用いたが、銅等の他の金属からなる
ものであっても良い。
In the above embodiment, the accumulator (1) and the pipes (2a) and (2b) are made of aluminum, but may be made of another metal such as copper.

【0040】[0040]

【発明の効果】この発明に係る高周波ろう付方法は、上
述の次第で、第1のパイプの接続筒部の長さが10mm
以上に設定されているから、接続筒部と絞り部の連接部
分のなす角度θが150度以下であっても、高周波誘導
コイルを接合部に対しては適正な位置にセットしつつ絞
り部からは離間して配置することができ、従って該コイ
ルによる誘導作用の影響が絞り部に及ぶのを抑制でき、
ろう付時の絞り部の熱的損傷を抑制することができる。
According to the high frequency brazing method according to the present invention, the length of the connecting pipe portion of the first pipe is 10 mm.
Therefore, even if the angle θ between the connecting portion of the connecting cylinder portion and the constricted portion is 150 degrees or less, the high-frequency induction coil is set at an appropriate position with respect to the joining portion, and the Can be arranged apart from each other, so that the influence of the induction action by the coil can be suppressed from reaching the throttle portion,
It is possible to suppress thermal damage to the narrowed portion during brazing.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の一実施形態に用いたアキュームレー
タの縦断面図である。
FIG. 1 is a longitudinal sectional view of an accumulator used in an embodiment of the present invention.

【図2】図1のアキュームレータとパイプとの接続前の
状態の斜視図である。
FIG. 2 is a perspective view of a state before connection between the accumulator and a pipe in FIG. 1;

【図3】(イ)はアキュームレータの一方の接続筒部に
一方のパイプを挿入した状態の、(ロ)は他方の接続筒
部に他方のパイプを挿入した状態のそれぞれ縦断面図で
ある。
3A is a longitudinal sectional view of a state where one pipe is inserted into one connecting cylinder of the accumulator, and FIG. 3B is a longitudinal sectional view of the state where the other pipe is inserted into the other connecting cylinder.

【図4】(イ)はろう付部位を高周波誘導コイルにセッ
トした状態の正面図、(ロ)は(イ)のコイルのみをIV
−IV線にて切断した状態の断面図である。
FIG. 4A is a front view showing a state where a brazing portion is set on a high-frequency induction coil, and FIG. 4B is a view showing only the coil of FIG.
It is sectional drawing in the state cut | disconnected by the -IV line.

【図5】アキュームレータの変形例を示す縦断面図であ
る。
FIG. 5 is a longitudinal sectional view showing a modified example of the accumulator.

【図6】従来のろう付方法を示すもので(イ)は両パイ
プを組み合わせる前の斜視図、(ロ)は組み合わせ後の
断面図である。
FIG. 6 shows a conventional brazing method, in which (a) is a perspective view before the two pipes are combined, and (b) is a cross-sectional view after the combination.

【図7】同じく従来の他のろう付方法を示すもので、パ
イプを挿入する前の状態の縦断面図である。
FIG. 7 is a longitudinal sectional view showing another conventional brazing method in a state before a pipe is inserted.

【符号の説明】[Explanation of symbols]

1…アキュ…ムレータ(第1の金属製パイプ) 11…本体部 12a、12b…絞り部 13a、13b…接続筒部 16…連接部分 2a、2b…アルミニウムパイプ(第2の金属製パイ
プ) 3…ろう材 4…ろう材充填用隙間 20…高周波誘導コイル
DESCRIPTION OF SYMBOLS 1 ... Accu ... Murator (1st metal pipe) 11 ... Body part 12a, 12b ... Throttle part 13a, 13b ... Connection cylinder part 16 ... Connection part 2a, 2b ... Aluminum pipe (2nd metal pipe) 3 ... Brazing material 4: Brazing filler gap 20: High frequency induction coil

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 断面円形の本体部(11)と、該本体部
(11)に連続して先細り状に縮径された絞り部(12
a)(12b)と、該絞り部(12a)(12b)の先
端に突出した接続筒部(13a)(13b)とを備え、
接続筒部(13a)(13b)と絞り部(12a)(1
2b)の連接部分(16)のなす角度θが150度以下
である金属製の第1のパイプ(1)を対象とし、該第1
のパイプ(1)の前記接続筒部(13a)(13b)
に、金属製の第2のパイプ(2a)(2b)を高周波ろ
う付する方法であって、 前記第1のパイプ(1)の接続筒部(13a)(13
b)の長さL1、L2が、10mm以上に設定されてな
ることを特徴とする高周波ろう付方法。
1. A main body (11) having a circular cross section, and a constricted portion (12) tapered continuously to the main body (11).
a) and (12b), and connecting cylindrical portions (13a) and (13b) protruding at the ends of the throttle portions (12a) and (12b).
The connection cylinder (13a) (13b) and the throttle (12a) (1
The first pipe (1) made of metal, in which the angle θ formed by the connecting portion (16) of 2b) is 150 degrees or less, is applied to the first pipe (1).
Connection pipes (13a) (13b) of the pipe (1)
A high-frequency brazing method for the second metal pipes (2a) and (2b), wherein the connection pipe sections (13a) and (13) of the first pipe (1) are provided.
b) The high-frequency brazing method, wherein the lengths L1 and L2 are set to 10 mm or more.
JP11482797A 1997-05-02 1997-05-02 High frequency brazing method Pending JPH10296432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11482797A JPH10296432A (en) 1997-05-02 1997-05-02 High frequency brazing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11482797A JPH10296432A (en) 1997-05-02 1997-05-02 High frequency brazing method

Publications (1)

Publication Number Publication Date
JPH10296432A true JPH10296432A (en) 1998-11-10

Family

ID=14647688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11482797A Pending JPH10296432A (en) 1997-05-02 1997-05-02 High frequency brazing method

Country Status (1)

Country Link
JP (1) JPH10296432A (en)

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CN108758900A (en) * 2018-06-27 2018-11-06 广东美的暖通设备有限公司 Filter, the manufacturing method of filter and air conditioner
KR20230091695A (en) * 2021-12-16 2023-06-23 최낙주 Undercut prevention method for TIG welding end point
US11828485B2 (en) 2018-06-27 2023-11-28 Gd Midea Heating & Ventilating Equipment Co., Ltd. Filter, manufacturing method for filter and air conditioner

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100358662C (en) * 2004-05-01 2008-01-02 康定松 Technique of intermediate frequency braze welding bore bit
WO2010038449A1 (en) * 2008-10-02 2010-04-08 パナソニック株式会社 Method of manufacturing machine device, and refrigeration cycle device manufactured by same
EP2253906A1 (en) * 2008-10-02 2010-11-24 Panasonic Corporation Method of manufacturing machine device, and refrigeration cycle device manufactured by same
EP2253906A4 (en) * 2008-10-02 2014-11-12 Panasonic Corp Method of manufacturing machine device, and refrigeration cycle device manufactured by same
CN103791196A (en) * 2013-10-10 2014-05-14 浙江三花制冷集团有限公司 Fluid storage muffler
CN107013783A (en) * 2013-10-10 2017-08-04 浙江三花制冷集团有限公司 A kind of muffler
CN107131366A (en) * 2013-10-10 2017-09-05 浙江三花制冷集团有限公司 A kind of attachment structure of pipe fitting joint structure and stainless steel pipe and copper pipe
JP2017159315A (en) * 2016-03-08 2017-09-14 株式会社東芝 Induction heating device, bonding method, bonding component, and rotary electric machine with the same component
CN108758900A (en) * 2018-06-27 2018-11-06 广东美的暖通设备有限公司 Filter, the manufacturing method of filter and air conditioner
US11828485B2 (en) 2018-06-27 2023-11-28 Gd Midea Heating & Ventilating Equipment Co., Ltd. Filter, manufacturing method for filter and air conditioner
KR20230091695A (en) * 2021-12-16 2023-06-23 최낙주 Undercut prevention method for TIG welding end point

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