JP2006187795A - Welding method, and passage changing device manufactured by using the same - Google Patents

Welding method, and passage changing device manufactured by using the same Download PDF

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JP2006187795A
JP2006187795A JP2005002725A JP2005002725A JP2006187795A JP 2006187795 A JP2006187795 A JP 2006187795A JP 2005002725 A JP2005002725 A JP 2005002725A JP 2005002725 A JP2005002725 A JP 2005002725A JP 2006187795 A JP2006187795 A JP 2006187795A
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joint
joint pipe
welding method
valve body
electron beam
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Fumio Kanezaki
文雄 金崎
Michiaki Ono
道明 大野
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Saginomiya Seisakusho Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To avoid the generation of cracks in a fused portion when components of different metals are joined by the laser beam welding or the electron beam welding, etc. <P>SOLUTION: An output and an irradiation time in an electron beam welding apparatus are set such that the bead width Wb at the fused portion Wf in a joined portion is smaller than 1.5 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、異種の金属の部材を互いに溶接することができる溶接方法、および、その方法を用いて製造される流路切換装置であって、特に、空気調和機、冷蔵・冷凍装置等に使用される流路切換装置に関する。   The present invention relates to a welding method capable of welding different kinds of metal members to each other, and a flow path switching device manufactured by using the method, and particularly used for an air conditioner, a refrigeration / refrigeration device, and the like. The present invention relates to a flow path switching device.

例えば、特許文献１にも示されるような電動式制御弁等の流路切換装置において、ステンレス製の装置本体内部に形成される流路の各開口端部にそれぞれ、銅合金製の継手用パイプを接合するにあたっては、一般に、ろう付けにより接合されている。このようなろう付けによる接合部においては、温度ムラまたはボイド（空孔）による接合不良や、また、ステンレス鋼材をろう付けする際のろう付け温度は高温となるため銅の組織が大きくなりその強度が低下する問題があり、更に、異種金属による局部電池による電解腐食等に起因した漏れ等の不具合が生じる場合がある。   For example, in a flow path switching device such as an electric control valve as shown in Patent Document 1, a joint pipe made of a copper alloy is provided at each opening end of a flow path formed inside a stainless steel device body. In general, these are joined by brazing. In such a joint by brazing, bonding failure due to temperature unevenness or voids (voids), and the brazing temperature when brazing stainless steel material is high, so the structure of copper becomes large and its strength In addition, there may be a problem such as leakage due to electrolytic corrosion caused by a local battery made of a different metal.

このような不具合の対策として、特許文献２乃至４にも示されるように、ステンレス製の部品と銅合金製の部品とをレーザ溶接または電子ビーム溶接等により、接合することが提案されている。   As countermeasures against such problems, as disclosed in Patent Documents 2 to 4, it is proposed to join a stainless steel part and a copper alloy part by laser welding or electron beam welding.

特開２００１−３０４４４５号公報JP 2001-304445 A 特開２００２−３３６９８３号公報JP 2002-336983 A 特開２００１−４７２４４号公報JP 2001-47244 A 特表２００３−５１７８７２号公報Special table 2003-517872 gazette

しかしながら、上述のようにステンレス製の部品と銅合金製の部品とがレーザ溶接または電子ビーム溶接等により、接合される場合、その溶融部における銅成分量が、所定量ｗｔ％以上の範囲、含まれるとき、割れがその溶融部に生じることが本願の発明者により確認されている。本願の発明者によれば、割れの発生の１つの原因としては、銅成分が鉄の結晶粒界に移動し粒界を割ることによるものと考えられ、また、他の原因としては、溶接後、溶融部における冷却による熱ひずみの作用と考えられている。   However, as described above, when a stainless steel part and a copper alloy part are joined by laser welding or electron beam welding, the amount of copper component in the melted portion is within a range of a predetermined amount wt% or more. The inventor of the present application has confirmed that cracking occurs in the melted part. According to the inventors of the present application, one cause of the occurrence of cracking is considered to be that the copper component moves to the grain boundary of iron and breaks the grain boundary, and the other cause is after welding. It is considered to be the effect of thermal strain due to cooling in the molten part.

以上の問題点を考慮し、本発明は、異種の金属の部材を互いに溶接することができる溶接方法、および、その方法を用いて製造される流路切換装置であって、異種金属の部品がレーザ溶接または電子ビーム溶接等により、接合される場合において、その溶融部における割れの発生を回避できる溶接方法、および、その方法を用いて製造される流路切換装置を提供することを目的とする。   In view of the above problems, the present invention is a welding method capable of welding different metal members to each other, and a flow path switching device manufactured using the method, wherein different metal parts are An object of the present invention is to provide a welding method capable of avoiding the occurrence of cracks in the melted portion when joining by laser welding or electron beam welding, and a flow path switching device manufactured using the method. .

上述の目的を達成するために、本発明に係る溶接方法は、第１の金属材料で作られた第１の部材の接合端と、第１の金属材料の溶融温度と異なる溶融温度を有する第２の金属材料で作られた第２の部材の接合端とを対向配置する工程と、第１の部材の接合端と第２の部材の接合端とが合わされる接合部に対し接合部における溶融部のビード幅が１．５ｍｍ以下となるように電子ビームまたはレーザビームを照射する工程と、を含んでなる。
本発明に係る溶接方法を用いて製造される流路切換装置は、内部に形成される流路を切り換える切換機構を有するステンレス製の弁本体と、弁本体の流路に接続される銅製の継手用パイプと、を備え、上述の溶接方法により継手用パイプの一端と弁本体とが溶接されることを特徴とする。 In order to achieve the above-described object, a welding method according to the present invention includes a joining end of a first member made of a first metal material and a melting temperature different from the melting temperature of the first metal material. The step of disposing the joining end of the second member made of the metal material 2 and the joining portion where the joining end of the first member and the joining end of the second member are combined with each other are melted at the joining portion. Irradiating with an electron beam or a laser beam so that the bead width of the portion is 1.5 mm or less.
A flow path switching device manufactured using a welding method according to the present invention includes a stainless steel valve body having a switching mechanism for switching a flow path formed therein, and a copper joint connected to the flow path of the valve body. And one end of the joint pipe and the valve body are welded by the above-described welding method.

以上の説明から明らかなように、本発明に係る溶接方法および、その方法を用いて製造される流路切換装置によれば、第１の部材の接合端と第２の部材の接合端とが合わされる接合部に対し接合部における溶融部のビード幅が１．５ｍｍ以下となるように電子ビームまたはレーザビームを照射する工程を含むことにより、接合部における入熱量を小とし比較的短期間とし、また、入熱部を小さく局部的とし、その結果、銅成分が鉄の結晶粒界への移動しても粒界を割る為の熱エネルギーがなく、かつ、熱ひずみが小となるので異種金属の部品がレーザ溶接または電子ビーム溶接等により、接合される場合において、その溶融部における割れの発生を回避できる。   As is clear from the above description, according to the welding method according to the present invention and the flow path switching device manufactured using the method, the joint end of the first member and the joint end of the second member are By including a step of irradiating an electron beam or a laser beam so that the bead width of the melted portion at the joined portion is 1.5 mm or less with respect to the joined portion to be joined, the amount of heat input at the joined portion is reduced and a relatively short period of time is achieved. In addition, the heat input part is made small and localized, and as a result, even if the copper component moves to the grain boundary of iron, there is no thermal energy to break the grain boundary, and the thermal strain becomes small, so When metal parts are joined by laser welding, electron beam welding, or the like, it is possible to avoid the occurrence of cracks in the molten part.

図３は、本発明に係る溶接方法の第１実施例または後述する他の例が適用される電動式制御弁の外観を示す。   FIG. 3 shows the appearance of an electric control valve to which the first embodiment of the welding method according to the present invention or another example to be described later is applied.

図３において、電動式制御弁は、その内部に後述する継手用パイプ１２および１４の内部に連通する流路を有する弁本体１０と、弁本体１０における弁座（不図示）が設けられる流路の一端に接続される継手用パイプ１４と、弁本体１０における流路の他端に接続される継手用パイプ１２と、弁本体１０に固定されるロアケース１６とアッパケース２２とに形成される内部空間内に設けられその弁座の開閉を行うニードル（不図示）、このニードルを作動させるねじ機構およびマグネット等からなる開閉機構（切換機構）部と、アッパケース２２の外周部に設けられ、上述のマグネットを選択的に励磁させるコイル２０と、を主な要素として構成されている。   In FIG. 3, the electric control valve has a valve body 10 having a flow passage communicating with the inside of joint pipes 12 and 14 to be described later, and a flow passage in which a valve seat (not shown) in the valve main body 10 is provided. A joint pipe 14 connected to one end of the valve body 10, a joint pipe 12 connected to the other end of the flow path in the valve body 10, and a lower case 16 and an upper case 22 fixed to the valve body 10. A needle (not shown) provided in the space for opening and closing the valve seat, an opening / closing mechanism (switching mechanism) portion including a screw mechanism and a magnet for operating the needle, and an outer peripheral portion of the upper case 22 are provided. And a coil 20 for selectively exciting the magnets as main elements.

本発明に係る溶接方法の第１実施例は、斯かる電動式制御弁において、銅系材料（銅および銅合金材料を含む）の１つである銅合金製の継手用パイプ１２および１４とステンレス鋼製の弁本体１０との接合に対して適用されている。   In the first embodiment of the welding method according to the present invention, in such an electric control valve, the copper alloy joint pipes 12 and 14 which are one of copper-based materials (including copper and copper alloy materials) and stainless steel are used. This is applied to joining with the valve body 10 made of steel.

図１に示されるように、流路１２ａを内部に有する継手用パイプ１２は、弁本体１０の一方の開口端１０ｅに、継手用パイプ１２の一端（接合端）１２ｅが突き合わされた状態で溶接されている。なお、弁本体１０の他方の開口端（不図示）に接合される継手用パイプ１４の一端における接合構造も同様な構造とされる。また、弁本体１０の一方または他方の開口端１０ｅの内部には、弁本体１０の内部流路に連通する孔１０ａが形成されている。   As shown in FIG. 1, the joint pipe 12 having a flow path 12 a therein is welded in a state where one end (joining end) 12 e of the joint pipe 12 is abutted against one open end 10 e of the valve body 10. Has been. The joint structure at one end of the joint pipe 14 joined to the other opening end (not shown) of the valve body 10 is also the same structure. Further, a hole 10 a communicating with the internal flow path of the valve main body 10 is formed inside one or the other open end 10 e of the valve main body 10.

継手用パイプ１２および継手用パイプ１４の一端における溶接方法は、同様とされるので継手用パイプ１２の溶接方法について説明し、継手用パイプ１４の溶接方法の説明については省略する。   Since the welding method at one end of the joint pipe 12 and the joint pipe 14 is the same, the welding method of the joint pipe 12 will be described, and the description of the welding method of the joint pipe 14 will be omitted.

継手用パイプ１２の一端１２ｅを開口端１０ｅの端面に溶接するにあたり、先ず、継手用パイプ１２の一端１２ｅと開口端１０ｅとが、同心軸線上に対向配置された後、互いに突き合わされ保持される。   In welding one end 12e of the joint pipe 12 to the end face of the opening end 10e, first, the one end 12e of the joint pipe 12 and the opening end 10e are arranged to face each other on the concentric axis, and are then abutted against each other and held. .

次に、図１に示されるように、突き合わされ保持された接合部の全周に対し所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、接合部における溶融部Ｗｆのビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。これにより、継手用パイプ１２の一端１２ｅが弁本体１０に溶接されることとなる。   Next, as shown in FIG. 1, an electron beam EB from a predetermined electron beam welding apparatus is irradiated with a predetermined output for a relatively short period of time on the entire circumference of the joined portion held and abutted. At that time, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the melted part Wf at the joint is 1.5 mm or less. As a result, the one end 12 e of the joint pipe 12 is welded to the valve body 10.

このように溶融部ＷＦのビード幅Ｗｂが１．５ｍｍ以下の場合、本願の発明者により、溶融部Ｗｆの銅成分量（ｗｔ％）が例えば、８〜１２ｗｔ％の範囲であっても、割れが接合部に発生しないことが検証されている。   As described above, when the bead width Wb of the melted part WF is 1.5 mm or less, the inventors of the present application can crack even if the copper component amount (wt%) of the melted part Wf is, for example, in the range of 8 to 12 wt%. Has been verified not to occur at the joint.

即ち、割れが発生しないのは、接合部における入熱量を小とし比較的短期間とすることにより、入熱部を小さく局部的とし、その結果、銅成分が鉄の結晶粒界へ移動しても熱ひずみが小となったからだと考えられる。   In other words, cracks do not occur because the heat input at the joint is small and relatively short, so that the heat input is small and localized, and as a result, the copper component moves to the iron grain boundaries. It is thought that this is because the thermal strain became small.

従って、高密度のエネルギーを非常に細いビームにすることにより、集中的にしかもピンポイント的な加熱を行うことで熱影響を与える部分を小さくすることができ、結果的に接合部における溶融部に作用する熱ひずみを低減することが可能となる。   Therefore, by making high-density energy a very thin beam, it is possible to reduce the heat-affected portion by performing intensive and pinpoint heating, and as a result, in the molten portion at the joint. It becomes possible to reduce the thermal strain which acts.

また、従来のろう付け方法においては、フラックス等を使用して溶接が行われるためその残渣処理、及び溶接により発生した異物の処理として酸洗い工程が不可欠であったが、
継手用パイプ１２および継手用パイプ１４の一端と弁本体１０とを溶接により接合することにより、酸洗いの工程が省略できるので水洗浄から乾燥工程が不要とされる。しかも、電位差による電解腐食、気密性等に影響のある問題も解決されることとなる。 Moreover, in the conventional brazing method, since the welding is performed using a flux or the like, the pickling process was indispensable as the residue treatment, and the treatment of foreign matter generated by welding,
By joining one end of the joint pipe 12 and the joint pipe 14 and the valve body 10 by welding, the pickling process can be omitted, so that the drying process is not required from the water cleaning. In addition, problems that affect electrolytic corrosion, hermeticity, and the like due to a potential difference are also solved.

図１に示される例においては、電子ビームＥＢが、継手用パイプ１２の一端１２ｅと開口端１０ｅの端面との境界部分（突合せ部分）に対し照射されているが、斯かる例に限られることなく、例えば、図２に示されるように、その境界部分から所定距離Ｄだけ継手用パイプ１２の他端側に離隔した位置に照射されてもよい。この場合においても、溶融部Ｗｆのビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。   In the example shown in FIG. 1, the electron beam EB is applied to the boundary portion (butting portion) between the one end 12e of the joint pipe 12 and the end surface of the opening end 10e. However, the present invention is limited to such an example. Instead, for example, as shown in FIG. 2, it may be irradiated to a position separated from the boundary portion by a predetermined distance D to the other end side of the joint pipe 12. Also in this case, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the melted portion Wf is 1.5 mm or less.

その際、所定距離Ｄは、継手用パイプ１２の厚さｔよりも小に設定される（０＜Ｄ＜ｔ）。   At this time, the predetermined distance D is set smaller than the thickness t of the joint pipe 12 (0 <D <t).

図１および２に示される例においては、その開口端部が弁本体１０と一体に形成されているが、斯かる例に限られることなく、例えば、図８に示されるように、ステンレス製の弁本体４０における流路に連通する開口端４０Ｂに接続されるステンレス製のアダプタ４０Ａを介して継手用パイプ１２の一端が同様に溶接されてもよい。   In the example shown in FIGS. 1 and 2, the opening end is formed integrally with the valve body 10, but the present invention is not limited to such an example. For example, as shown in FIG. One end of the joint pipe 12 may be similarly welded via a stainless steel adapter 40A connected to an open end 40B communicating with the flow path in the valve body 40.

図４および図５は、それぞれ、本発明に係る溶接方法の第２実施例に用いられる接合構造の要部を示す。   4 and 5 respectively show the main part of the joint structure used in the second embodiment of the welding method according to the present invention.

図４に示される接合構造においては、継手用パイプ１２’の一端が挿入される孔１０’ａが、弁本体１０’における開口端に、設けられる。これにより、孔１０’ａに挿入された継手用パイプ１２’の一端１２’ｅの端面がその孔１０’ａの一端に当接し保持されることとなる。   In the joint structure shown in FIG. 4, a hole 10 ′ a into which one end of the joint pipe 12 ′ is inserted is provided at the open end of the valve body 10 ′. As a result, the end face of one end 12'e of the joint pipe 12 'inserted into the hole 10'a comes into contact with and is held by one end of the hole 10'a.

次に、図５に示されるように、開口端１０’ｅの端面で交わる継手用パイプ１２’の外周面近傍の全周に対し所定の角度θをなして所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、接合部における溶融部Ｗｆのビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。なお、角度θは、９０°未満に設定される（０＜θ＜９０°）。また、継手用パイプ１２’の外周面における電子ビームＥＢの到達位置と開口端１０’ｅの端面との距離Ｄ’は、上述の所定距離Ｄよりも小に設定される（Ｄ’＝Ｄ×ＳＩＮθ）。   Next, as shown in FIG. 5, the electrons from the predetermined electron beam welding apparatus form a predetermined angle θ with respect to the entire circumference in the vicinity of the outer peripheral surface of the joint pipe 12 ′ that intersects the end surface of the opening end 10′e. The beam EB is irradiated with a predetermined output for a relatively short period of time. At that time, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the melted part Wf at the joint is 1.5 mm or less. The angle θ is set to be less than 90 ° (0 <θ <90 °). The distance D ′ between the arrival position of the electron beam EB on the outer peripheral surface of the joint pipe 12 ′ and the end surface of the opening end 10′e is set to be smaller than the predetermined distance D (D ′ = D × SINθ).

斯かる方法においても、上述の例と同様な効果が得られることとなる。   Also in such a method, the same effect as the above-mentioned example will be acquired.

なお、図４および図５に示される例においては、継手用パイプ１２’の一端が挿入される孔１０’ａは、端部を有するものであるが、斯かる例に限られることなく、例えば、図９に示されるように、弁本体４８が継手用パイプ１２’の一端が挿入される貫通孔４８ａを有するものであってもよい。   In the example shown in FIGS. 4 and 5, the hole 10 ′ a into which one end of the joint pipe 12 ′ is inserted has an end portion, but is not limited to such an example. As shown in FIG. 9, the valve body 48 may have a through hole 48a into which one end of the joint pipe 12 'is inserted.

図６は、本発明に係る溶接方法の第３実施例に用いられる接合構造の要部を示す。   FIG. 6 shows a main part of the joint structure used in the third embodiment of the welding method according to the present invention.

図６に示される接合構造においては、銅製の継手用パイプ３２の一端が挿入される孔３０ａが、ステンレス製の弁本体３０における開口端に、設けられる。弁本体３０における開口端の外周部には、その開口端の溶融部を少なくするように面取り３０Ｃが全周に施されている。   In the joining structure shown in FIG. 6, a hole 30 a into which one end of a copper coupling pipe 32 is inserted is provided at the opening end of the stainless steel valve body 30. A chamfer 30C is provided on the entire outer periphery of the valve body 30 so as to reduce the melted portion of the open end.

これにより、孔３０ａに挿入された継手用パイプ３２の一端３２ｅの端面は、その孔３０ａの一端に当接し保持されることとなる。   As a result, the end face of the one end 32e of the joint pipe 32 inserted into the hole 30a comes into contact with and is held by one end of the hole 30a.

次に、弁本体３０における開口端の端面で交わる継手用パイプ３２の外周面近傍の全周に対し略垂直に所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、接合部における溶融部のビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。なお、継手用パイプ３２の外周面近傍における電子ビームＥＢの照射位置は、図６において破線で示されるように、その開口端の端面に対し所定距離、継手用パイプ３２の他端側に離隔した位置であってもよい。   Next, the electron beam EB from a predetermined electron beam welding apparatus has a predetermined output for a relatively short period of time substantially perpendicularly to the entire circumference in the vicinity of the outer peripheral surface of the joint pipe 32 that intersects at the end face of the opening end of the valve body 30. Irradiated. At that time, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the melted portion in the joint portion is 1.5 mm or less. In addition, the irradiation position of the electron beam EB in the vicinity of the outer peripheral surface of the joint pipe 32 is separated from the end face of the opening end by a predetermined distance to the other end side of the joint pipe 32 as shown by a broken line in FIG. It may be a position.

斯かる方法においても、上述の例と同様な効果が得られるとともに、より少ない熱量により短期間で溶接可能となるので溶融部において継手用パイプ３２における銅成分の侵入を抑制できることとなる。   Even in such a method, the same effect as the above-described example can be obtained, and welding can be performed in a short period of time with a smaller amount of heat, so that intrusion of the copper component into the joint pipe 32 can be suppressed in the molten portion.

図７は、本発明に係る溶接方法の第４実施例に用いられる接合構造の要部を示す。   FIG. 7 shows the main part of the joint structure used in the fourth embodiment of the welding method according to the present invention.

図７に示される接合構造においては、銅製の継手用パイプ３６の一端３６ｅが突き合わされる端部３４ｅが、ステンレス製の弁本体３４における開口端に形成されている。弁本体３４における開口端の外周部には、その開口端の溶融部を少なくするように溝部３４ｇが全周に施されている。一方、継手用パイプ３６の開口端の外周部にもその開口端の溶融部を少なくするように溝部３６ｇが全周に施されている。溝部３６ｇは、その外周部において一端３６ｅまでの残部の軸線方向の長さが値ｂとなるように形成されている。一方、弁本体３４における溝部３４ｇは、その外周部において一端までの残部の軸線方法の長さが値ａとなるように形成されている。値ａは、弁本体３４における溶融部を小とするように値ｂよりも小に設定されている。   In the joining structure shown in FIG. 7, an end portion 34 e with which one end 36 e of a copper joint pipe 36 is abutted is formed at the open end of the stainless steel valve body 34. A groove portion 34g is formed on the entire outer periphery of the valve body 34 so as to reduce the melted portion of the open end. On the other hand, a groove 36g is also provided on the entire circumference of the outer peripheral portion of the open end of the joint pipe 36 so as to reduce the melted portion of the open end. The groove portion 36g is formed such that the length in the axial direction of the remaining portion up to the one end 36e at the outer peripheral portion is a value b. On the other hand, the groove part 34g in the valve main body 34 is formed so that the length of the axial method of the remaining part to the one end in the outer peripheral part becomes the value a. The value a is set smaller than the value b so that the melted portion in the valve body 34 is small.

その際、継手用パイプ３６の一端３６ｅの端面は、弁本体３４の開口端に突き合わされ保持される。   At that time, the end face of the one end 36 e of the joint pipe 36 is abutted against and held by the open end of the valve body 34.

次に、弁本体３４における開口端の端部３４ｅと継手用パイプ３６の一端３６ｅとの境界部分に対し略垂直に所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、接合部における溶融部のビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。なお、継手用パイプ３６の外周面における電子ビームＥＢの照射位置は、図７において破線で示されるように、その開口端の端面に対し所定距離、継手用パイプ３６の他端側に離隔した位置であってもよい。   Next, an electron beam EB from a predetermined electron beam welding apparatus is output for a relatively short period of time in a relatively short period with respect to the boundary portion between the opening end 34e of the valve body 34 and the end 36e of the joint pipe 36. It is irradiated with. At that time, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the melted portion in the joint portion is 1.5 mm or less. The irradiation position of the electron beam EB on the outer peripheral surface of the joint pipe 36 is a position separated by a predetermined distance from the end face of the opening end on the other end side of the joint pipe 36, as indicated by a broken line in FIG. It may be.

斯かる方法においても、上述の例と同様な効果が得られるとともに、より少ない熱量により短期間で溶接可能となるので溶融部において継手用パイプ３６における銅成分の侵入を抑制できることとなる。   Even in such a method, the same effect as the above-described example can be obtained, and welding can be performed in a short period of time with a smaller amount of heat, so that intrusion of the copper component into the joint pipe 36 can be suppressed in the molten portion.

図１０は、本発明に係る溶接方法の第５実施例に用いられる接合構造の要部を示す。   FIG. 10 shows a main part of the joint structure used in the fifth embodiment of the welding method according to the present invention.

図４に示される例においては、継手用パイプ１２’の一端の外周部が弁本体１０’の孔１０’ａに挿入されているが、一方、図１０に示される例においては、ステンレス製の弁本体４４における開口端部の外周部に、銅製の継手用パイプ４６の一端４６ｅの内周部が挿入される段差部４４ｓが形成されるものである。弁本体４４における開口端部は、内部に設けられる流路に連通する孔４４ａを有している。   In the example shown in FIG. 4, the outer peripheral portion of one end of the joint pipe 12 ′ is inserted into the hole 10′a of the valve body 10 ′. On the other hand, in the example shown in FIG. A stepped portion 44 s is formed on the outer peripheral portion of the opening end portion of the valve main body 44, into which the inner peripheral portion of one end 46 e of the copper joint pipe 46 is inserted. The opening end of the valve main body 44 has a hole 44a that communicates with a flow path provided inside.

次に、図１０に示されるように、継手用パイプ４６の一端４６ｅと段差部４４ｓとの当接部分である接合部の全周に対し所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、上述の例と同様に、接合部における溶融部のビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。   Next, as shown in FIG. 10, the electron beam EB from the predetermined electron beam welding apparatus is relatively applied to the entire circumference of the joint portion, which is a contact portion between the one end 46e of the joint pipe 46 and the stepped portion 44s. Irradiation with a predetermined output for a short period. At that time, similarly to the above-described example, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the molten portion in the joint portion is 1.5 mm or less.

斯かる方法においても、上述の例と同様な効果が得られることとなる。   Also in such a method, the same effect as the above-mentioned example will be acquired.

図１１は、本発明に係る溶接方法の第６実施例に用いられる接合構造の要部を示す。
図４に示される例においては、継手用パイプ１２’の一端の外周部が弁本体１０’の孔１０’ａに挿入されているが、一方、図１１に示される例においては、ステンレス製の弁本体５２の開口端部において比較的長く突出する直管部の外周部に、銅製の継手用パイプ５４の一端５４ｅの内周部が挿入されるものである。弁本体５２における開口端部は、内部に設けられる流路に連通する孔５２ａを有している。また、継手用パイプ５４の一端５４ｅと弁本体５２の外周面との間の距離Ｌは、後述する電子ビームＥＢが継手用パイプ５４の一端５４ｅに所定の角度で照射されるような値に設定されている。 FIG. 11 shows the main part of the joint structure used in the sixth embodiment of the welding method according to the present invention.
In the example shown in FIG. 4, the outer peripheral portion of one end of the joint pipe 12 ′ is inserted into the hole 10′a of the valve body 10 ′. On the other hand, in the example shown in FIG. The inner peripheral portion of one end 54e of the copper joint pipe 54 is inserted into the outer peripheral portion of the straight pipe portion that protrudes relatively long at the opening end portion of the valve body 52. The open end of the valve main body 52 has a hole 52a communicating with a flow path provided inside. The distance L between the one end 54e of the joint pipe 54 and the outer peripheral surface of the valve body 52 is set to a value such that an electron beam EB described later is irradiated to the one end 54e of the joint pipe 54 at a predetermined angle. Has been.

次に、図１１に示されるように、継手用パイプ５４の一端５４ｅの端面と直管部の外周面とが交わる接合部の全周に対し所定の角度をもって所定の電子ビーム溶接装置からの電子ビームＥＢが比較的短期間、所定の出力をもって照射される。その際、上述の例と同様に、接合部における溶融部のビード幅Ｗｂが１．５ｍｍ以下となるように電子ビーム溶接装置における出力、照射時間が設定される。斯かる方法においても、上述の例と同様な効果が得られることとなる。   Next, as shown in FIG. 11, the electrons from the predetermined electron beam welding apparatus have a predetermined angle with respect to the entire circumference of the joint portion where the end surface of one end 54e of the joint pipe 54 and the outer peripheral surface of the straight pipe portion intersect. The beam EB is irradiated with a predetermined output for a relatively short period of time. At that time, similarly to the above-described example, the output and irradiation time in the electron beam welding apparatus are set so that the bead width Wb of the molten portion in the joint portion is 1.5 mm or less. Also in such a method, the same effect as the above-mentioned example will be acquired.

上述の実施例においては、電動式制御弁に対して適用されているが、斯かる例に限られることなく、異種の金属製の部材が相互に接合されるような他の装置、例えば、電磁弁、四方弁、圧力スイッチ（センサ）にも本発明に係る溶接方法の一例が適用されてもよい。   In the above-described embodiment, the present invention is applied to the electric control valve. However, the present invention is not limited to such an example, and other devices in which different metal members are joined to each other, for example, electromagnetic An example of the welding method according to the present invention may be applied to a valve, a four-way valve, and a pressure switch (sensor).

また、上述の例においては。電子ビーム溶接装置が用いられているが、斯かる例に限られることなく、例えば、所謂、レーザ溶接装置が用いられても良い。   Also in the above example. Although an electron beam welding apparatus is used, the present invention is not limited to such an example, and for example, a so-called laser welding apparatus may be used.

本発明に係る溶接方法の第１実施例に用いられる接合構造を示す部分断面図である。It is a fragmentary sectional view which shows the joining structure used for 1st Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第１実施例の変形例の説明に供される部分拡大断面図である。It is a partial expanded sectional view which is provided for description of the modification of 1st Example of the welding method which concerns on this invention. 本発明に係る溶接方法の実施例が適用される電動式制御弁の外観を示す正面図である。It is a front view which shows the external appearance of the electrically driven control valve to which the Example of the welding method which concerns on this invention is applied. 本発明に係る溶接方法の第２実施例に用いられる接合構造の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the joining structure used for 2nd Example of the welding method which concerns on this invention. 図４に示される例における部分拡大断面図である。It is a partial expanded sectional view in the example shown by FIG. 本発明に係る溶接方法の第３実施例に用いられる接合構造の要部を示す部分拡大断面図である。It is a partial expanded sectional view which shows the principal part of the joining structure used for 3rd Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第４実施例に用いられる接合構造の要部を示す部分拡大断面図である。It is a partial expanded sectional view which shows the principal part of the joining structure used for 4th Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第１実施例の他の変形例の説明に供される部分拡大断面図である。It is a partial expanded sectional view used for description of the other modification of 1st Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第２実施例の変形例に用いられる接合構造の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the joining structure used for the modification of 2nd Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第５実施例に用いられる接合構造の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the joining structure used for 5th Example of the welding method which concerns on this invention. 本発明に係る溶接方法の第６実施例に用いられる接合構造の要部を示す部分断面図である。It is a fragmentary sectional view which shows the principal part of the joining structure used for 6th Example of the welding method which concerns on this invention.

符号の説明Explanation of symbols

１０ 弁本体
１２、１４ 継手用パイプ
Ｗｆ 溶融部
ＥＢ 電子ビーム
Ｗｂ ビード幅
10 Valve body 12, 14 Joint pipe Wf Melting zone EB Electron beam Wb Bead width

Claims (3)

第１の金属材料で作られた第１の部材の接合端と、該第１の金属材料の溶融温度と異なる溶融温度を有する第２の金属材料で作られた第２の部材の接合端とを対向配置する工程と、
前記第１の部材の接合端と前記第２の部材の接合端とが合わされる接合部に対し該接合部における溶融部のビード幅が１．５ｍｍ以下となるように電子ビームまたはレーザビームを照射する工程と、
を含んでなることを特徴とする溶接方法。 A joining end of a first member made of a first metal material, and a joining end of a second member made of a second metal material having a melting temperature different from the melting temperature of the first metal material; A step of opposingly arranging,
Irradiate an electron beam or a laser beam so that the bead width of the melted portion at the joint is 1.5 mm or less with respect to the joint where the joint end of the first member and the joint end of the second member are combined. And a process of
A welding method comprising: 前記第１の金属材料は、ステンレス鋼材であり、前記第２の金属材料は、銅系材料であることを特徴とする請求項１記載の溶接方法。   The welding method according to claim 1, wherein the first metal material is a stainless steel material, and the second metal material is a copper-based material. 内部に形成される流路を切り換える切換機構を有するステンレス製の弁本体と、
前記弁本体の前記流路に接続される銅製の継手用パイプと、を備え、
請求項１記載の溶接方法により前記継手用パイプの一端と弁本体とが溶接されることを特徴とする流路切換装置。

A valve body made of stainless steel having a switching mechanism for switching a flow path formed inside;
A copper joint pipe connected to the flow path of the valve body,
A flow path switching device, wherein one end of the joint pipe and the valve body are welded by the welding method according to claim 1.

JP2005002725A 2005-01-07 2005-01-07 Welding method, and passage changing device manufactured by using the same Pending JP2006187795A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101402347B1 (en) 2007-12-21 2014-06-03 주식회사 한라이비텍 Electron Beam Welding Method of Superconducting Cavity
WO2014141555A1 (en) * 2013-03-15 2014-09-18 株式会社鷺宮製作所 Valve device and method for producing same
CN109128476A (en) * 2018-09-13 2019-01-04 郑州郑飞机电技术有限责任公司 A kind of electron beam welding processing method of stainless steel frame structure

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JPH03198992A (en) * 1989-12-27 1991-08-30 Toshiba Corp Laser beam welding method for different kind of metallic bar materials
JPH08315788A (en) * 1995-03-15 1996-11-29 Nippondenso Co Ltd Manufacture of square battery
JP2002147901A (en) * 2000-11-15 2002-05-22 Saginomiya Seisakusho Inc Motorized valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03198992A (en) * 1989-12-27 1991-08-30 Toshiba Corp Laser beam welding method for different kind of metallic bar materials
JPH08315788A (en) * 1995-03-15 1996-11-29 Nippondenso Co Ltd Manufacture of square battery
JP2002147901A (en) * 2000-11-15 2002-05-22 Saginomiya Seisakusho Inc Motorized valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101402347B1 (en) 2007-12-21 2014-06-03 주식회사 한라이비텍 Electron Beam Welding Method of Superconducting Cavity
WO2014141555A1 (en) * 2013-03-15 2014-09-18 株式会社鷺宮製作所 Valve device and method for producing same
CN109128476A (en) * 2018-09-13 2019-01-04 郑州郑飞机电技术有限责任公司 A kind of electron beam welding processing method of stainless steel frame structure

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