JP4132531B2 - Metal carrier for catalytic converter - Google Patents

Metal carrier for catalytic converter Download PDF

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Publication number
JP4132531B2
JP4132531B2 JP2000017166A JP2000017166A JP4132531B2 JP 4132531 B2 JP4132531 B2 JP 4132531B2 JP 2000017166 A JP2000017166 A JP 2000017166A JP 2000017166 A JP2000017166 A JP 2000017166A JP 4132531 B2 JP4132531 B2 JP 4132531B2
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Prior art keywords
core
outer cylinder
exhaust gas
metal carrier
periphery
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JP2001207838A (en
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博史 児玉
達雄 佐藤
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Calsonic Kansei Corp
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Calsonic Kansei Corp
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【０００１】
【発明の属する技術分野】
本発明は、内燃機関等の排気系に装着する触媒コンバータのメタル担体に関する。
【０００２】
【従来の技術】
従来、内燃機関の排気系には、排ガスを浄化する触媒コンバータが装着されており、これに用いる触媒担体として、昨今、Ｆｅ−Ｃｒ−Ａｌ系フェライトステンレス箔材（２０Ｃｒ−５Ａｌ−Ｌａ−Ｆｅ）等の金属製薄板からなるメタル担体が広く使用されている。
【０００３】
そして、従来、このメタル担体の製造方法として、特開平５−１３１１４３号公報又は図５乃至図８に示すように、金属製薄板からなる帯状の波板１と平板３を交互に重ね、これらを多重に巻回して断面円形状或いは断面レーシングトラック形状のコア（ハニカム体）５を形成した後、図６の如くコア５のリヤ側（排ガス流出側）または図８に示すようにコア５中央部の外周にＮｉロー箔材７を巻回し、これらを金属製の外筒９内に圧入して真空状態で加熱（熱処理）することにより、波板１と平板３を拡散接合させると共に、外筒９のとコア５をロー付け接合するメタル担体１１，１３の製造方法が知られている。
【０００４】
尚、上述したレーシングトラック形状とは、対向する２つの直線部分とこれらを連結して対向する２つの半円部分からなる陸上競技のトラック形状に類似する略楕円形状をいう。
【０００５】
【発明が解決しようとする課題】
而して、上述の如き従来の製造方法によると、図９の如く熱処理時に溶け出したロー材７-1が、毛細管現象によりコア５のフロント側（排ガス流入側）まで上がってコア５のフロント側が外筒９に部分的に接合してしまったり、また、図１０に示すように溶けたロー材７-1がコア５のフロント側やリヤ側に流れ出して、コア５のフロント側やリヤ側が外筒９に部分的に接合されてしまうことがあった。
【０００６】
しかし乍ら、コア５と外筒９には熱膨張差があるため、斯様にコア５が外筒９に部分的に接合されてしまうと、特に熱履歴の大きいフロント側では、外筒９に接合されている部位のコア５が自らの熱収縮に追従できずに破断し、また、コア５と外筒９との接合部位に振動による応力集中が生ずることも相俟って、図１１に示すようにコア５にセル脱落が発生してしまう虞があった。
【０００７】
本発明は斯かる実情に鑑み案出されたもので、熱処理時のロー上がりに起因するコアのセル脱落防止を図った触媒コンバータのメタル担体を提供することを目的とする。
【０００８】
斯かる目的を達成するため、請求項１に係る発明は、金属製薄板の波板と平板を交互に重ね、これらを多重に巻回して成形したコアの排ガス流出側外周にロー箔材を巻回し、これらを金属製の外筒内に圧入して熱処理することにより波板と平板を拡散接合させると共に、外筒の内周とコアの外周をロー材で接合した触媒コンバータのメタル担体に於て、
上記外筒とコアとの接合部位より排ガス流入側の外筒の内周にロー上がり防止剤を全周に亘って帯状に付着し、排ガス流出側外周にロー箔材を巻回した上記コアを、その排ガス流入側から外筒内に圧入させたことを特徴とする。
【０００９】
そして、請求項２に係る発明は、金属製薄板の波板と平板を交互に重ね、これらを多重に巻回して成形したコアの中央部外周にロー箔材を巻回し、これらを金属製の外筒内に圧入して熱処理することにより波板と平板を拡散接合させると共に、外筒の内周とコアの外周をロー材で接合した触媒コンバータのメタル担体に於て、上記外筒とコアとの接合部位より排ガス流入側の外筒の内周と、外筒とコアとの接合部位より排ガス流出側のコアの外周に、夫々、ロー上がり防止剤を全周に亘って帯状に付着し、中央部外周にロー箔材を巻回した上記コアを、その排ガス流入側から外筒内にそのリヤ側から圧入させたことを特徴とする。
【００１２】
（作用）
請求項１に係るメタル担体によれば、その製造時に熱処理によって溶け出したロー材が、毛細管現象によりコアの排ガス流入側へ上がろうとするが、ロー材はロー上がり防止剤に阻止されて、コアの排ガス流入側へのロー上がりが防止される。
【００１３】
そして、請求項２に係るメタル担体によれば、その製造工程に於ける熱処理時に、ロー箔材が溶けてロー材が毛細管現象によりコアの排ガス流入側や排ガス流出側に流れ出ようとするが、ロー材はロー上がり防止剤に阻止されて、それ以上の流出が防止されることとなる。
また、外筒へのコアの圧入時に、ロー上がり防止剤がロー箔材に被さってしまうことがないため、コアの中央部を外筒の内周に確実にロー付けさせることが可能となる。
【００１４】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づき詳細に説明する。
【００１５】
図１及び図２は請求項１に係るメタル担体の一実施形態を示し、図中、１５はＳＵＳ４３０のフェライト系ステンレスで成形された円筒形状の外筒、１７はＦｅ−Ｃｒ−Ａｌ系フェライトステンレス箔材からなる帯状の波板１９と平板２１を交互に重ね、これらを多重に巻回して成形された断面円形状のコアで、外筒１５の内径ｍはコア１７の外径ｎより小径とされている。
【００１６】
そして、図６に示すメタル担体１１と同様、本実施形態に係るメタル担体２３も、図１に示すようにリヤ側（排ガス流出側）１７ａの外周にＮｉロー箔材２５を巻回したコア１７を、そのフロント側（排ガス流入側）１７ｂから外筒１５内に圧入した後、これらを真空状態で加熱して波板１９と平板２１を拡散接合させると共に、外筒１５の内周とコア１７の外周をロー材で接合して製造されるが、本実施形態は、外筒１５へのコア１７の圧入に先立ち、外筒１５とコア１７との接合部位よりフロント側（排ガス流入側）１５ａの外筒１５の内周に、ロー上がり防止剤２７を全周に亘って帯状に塗布したことを特徴とする。
【００１７】
而して、ロー上がり防止剤２７として、例えば酸化チタンの溶液や混濁液が挙げられ、本実施形態では、具体的に米国ウォール・コルノモイ社製造のストップオフ材（商品「グリーンストップオフ」）をロー上がり防止剤２７として使用しており、このグリーンストップオフは、溶融金属の流れ防止や金属表面への耐熱マーカーとして周知である。
【００１８】
尚、ロー上がり防止剤２７の塗布量や塗布幅は、製造するメタル担体の容積やロー箔材２５の容量に応じて適宜選択される。
本実施形態に係るメタル担体２３はこのように構成されているから、図２に示すようにその製造時に熱処理によって溶け出したロー材２５-1が、毛細管現象によってコア１７のフロント側１７ｂへ上がろうとするが、ロー材２５-1は外筒１５の内周に塗布したロー上がり防止剤２７に阻止されて、コア１７のフロント側１７ｂへのロー上がりが防止されることとなる。
【００１９】
従って、本実施形態によれば、外筒１５とコア１７のフロント側１７ｂとの部分的な接合がなくなり、この結果、コア１７のセル脱落防止が図られることとなった。
図３及び図４は請求項２に係るメタル担体の一実施形態を示し、図中、２９は上記外筒１５と同一材料で成形された外筒、３１は上記コア１７と同様、交互に重ねた波板１９と平板２１を多重に巻回して成形された断面円形状のコアで、外筒２９の内径ｍはコア３１の外径ｎより小径とされている。
【００２０】
そして、図８に示すメタル担体１３と同様、本実施形態に係るメタル担体３３は、中央部の外周にロー箔材２５を巻回したコア３１を、そのフロント側（排ガス流入側）３１ａから外筒２９内にそのリヤ側（排ガス流出側）２９ｂから圧入した後、これらを真空状態で加熱して波板１９と平板２１を拡散接合させると共に、外筒２９の内周とコア３１の外周をロー材で接合して製造されるが、図３に示すように本実施形態は、外筒２９へのコア３１の圧入に先立ち、外筒２９とコア３１との接合部位よりフロント側（排ガス流入側）２９ａの外筒２９の内周と、当該接合部位よりリヤ側（排ガス流出側）３１ｂのコア３１の外周に、上記ロー上がり防止剤２７と同一成分のロー上がり防止剤３５，３７を、夫々、全周に亘って帯状に塗布したものである。
【００２１】
尚、本実施形態に於ても、ロー上がり防止剤３５，３７の塗布量や塗布幅は、製造するメタル担体の容積やロー箔材２５の容量に応じて適宜選択される。
本実施形態に係るメタル担体３３はこのように構成されているから、図４に示すようにその製造工程に於ける熱処理時に、ロー箔材２５が溶けてロー材２５-1が毛細管現象によりコア３１のフロント３１ａ側やリヤ３１ｂ側に流れ出ようとするが、ロー材２５-1は、外筒２９の内周に塗布したロー上がり防止剤３５とコア３１の外周に塗布したロー上がり防止剤３７に阻止されて、それ以上の流出が防止されることとなる。
【００２２】
従って、本実施形態によれば、外筒２９とコア３１のフロント側や３１ａリヤ側３１ｂとの部分的な接合がなくなり、この結果、コア３１のセル脱落の発生を防止することが可能となった。
また、上述したように本実施形態は、外筒２９のフロント側２９ａの内周と、コア３１のリヤ側３１ｂの外周にロー上がり防止剤３５，３７を塗布し、コア３１をそのフロント側（排ガス流入側）３１ａから外筒２９内にそのリヤ側（排ガス流出側）２９ｂから圧入させるので、外筒２９へのコア３１の圧入時に、ロー上がり防止剤３５，３７がロー箔材２５に被さってしまうことがなく、コア３１の中央部を外筒２９の内周に確実にロー付けさせることが可能である。
【００２３】
尚、上記各実施形態では、コア１７，３１を形成する平板２１を平坦な帯状の金属製薄板としたが、平板２１として山の高さが波板１９より十分小さい小波付きの平板を用いてもよい。
【００２４】
【発明の効果】
以上述べたように、請求項１に係るメタル担体によれば、製造時に熱処理によって溶け出したロー材が、毛細管現象によりコアの排ガス流入側へ上がろうとするが、ロー材はロー上がり防止剤に阻止されてロー上がりが防止されるため、外筒とコアの排ガス流入側との部分的な接合がなくなって、コアのセル脱落防止が可能となった。
【００２５】
そして、請求項２に係るメタル担体によれば、製造時に熱処理によって溶け出したロー材が、コアの排ガス流入側や排ガス流出側に流れ出ようとするが、ロー材はロー上がり防止剤に阻止されてそれ以上の流出が防止されるため、外筒とコアの排ガス流入側や排ガス流出側との部分的な接合がなくなって、コアのセル脱落の発生を防止することが可能となった。
また、外筒へのコアの圧入時に、ロー上がり防止剤がロー箔材に被さってしまうことがないため、コアの中央部を外筒の内周に確実にロー付けさせることが可能である。
【図面の簡単な説明】
【図１】 請求項１の一実施形態に係るメタル担体の外筒とコアの斜視図である。
【図２】 請求項１の一実施形態に係るメタル担体の斜視図である。
【図３】 請求項２の一実施形態に係るメタル担体の外筒とコアの斜視図である。
【図４】 請求項２の一実施形態に係るメタル担体の斜視図である。
【図５】従来のメタル担体の外筒とコアの斜視図である。
【図６】従来のメタル担体の斜視図である。
【図７】従来の他のメタル担体の外筒とコアの斜視図である。
【図８】従来の他のメタル担体の斜視図である。
【図９】図６に示すメタル担体の熱処理時に於けるロー材のロー上がりを示す説明図である。
【図１０】図８に示すメタル担体の熱処理時に於けるロー材のロー上がりを示す説明図である。
【図１１】セル脱落が発生したコアの排ガス流入側の斜視図である。
【符号の説明】
１５，２９ 外筒
１７，３１ コア
１９ 波板
２１ 平板
２３，３３ メタル担体
２５ ロー箔材
２５-1 ロー材
２７，３５，３７ ロー上がり防止剤[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal carrier of a catalytic converter to be mounted on an exhaust system of an internal combustion engine or the like.
[0002]
[Prior art]
Conventionally, an exhaust system of an internal combustion engine has been equipped with a catalytic converter for purifying exhaust gas. Recently, as a catalyst carrier used for this, an Fe—Cr—Al ferrite stainless steel foil material (20Cr-5Al—La—Fe) is used. A metal carrier made of a thin metal plate such as is widely used.
[0003]
Conventionally, as a method for producing this metal carrier, as shown in Japanese Patent Laid-Open No. 5-131143 or FIGS. 5 to 8, strip-like corrugated plates 1 and flat plates 3 made of metal thin plates are alternately stacked. After forming a core (honeycomb body) 5 having a circular cross-section or a cross-section racing track shape by winding multiple times, the rear side (exhaust gas outflow side) of the core 5 as shown in FIG. 6 or the center of the core 5 as shown in FIG. The Ni foil foil material 7 is wound around the outer periphery of the steel plate, and these are pressed into a metal outer tube 9 and heated (heat treated) in a vacuum state, whereby the corrugated sheet 1 and the flat plate 3 are diffusion-bonded and the outer tube A method for manufacturing metal carriers 11 and 13 in which the core 5 and the core 5 are joined by brazing is known.
[0004]
The above-mentioned racing track shape refers to a substantially elliptical shape similar to a track shape of an athletics game composed of two opposing linear portions and two semicircular portions that are connected to each other.
[0005]
[Problems to be solved by the invention]
Thus, according to the conventional manufacturing method as described above, the brazing material 7-1 melted during the heat treatment as shown in FIG. 9 rises up to the front side (exhaust gas inflow side) of the core 5 due to the capillary phenomenon. As shown in FIG. 10, the melted brazing material 7-1 flows out to the front side and the rear side of the core 5 and the front side and the rear side of the core 5 In some cases, the outer cylinder 9 is partially joined.
[0006]
However, since the core 5 and the outer cylinder 9 have a difference in thermal expansion, if the core 5 is partially joined to the outer cylinder 9 in this manner, the outer cylinder 9 particularly on the front side having a large thermal history. Together with the fact that the core 5 at the portion joined to the core 5 breaks without being able to follow its own thermal contraction, and stress concentration due to vibration occurs at the joint portion between the core 5 and the outer cylinder 9. As shown in FIG. 2, there is a possibility that cell dropout may occur in the core 5.
[0007]
The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a metal carrier for a catalytic converter that prevents the core from falling off the cell due to low rise during heat treatment.
[0008]
In order to achieve such an object, the invention according to claim 1 is directed to winding a low foil material around the exhaust gas outflow side outer periphery of a core formed by alternately laminating corrugated and flat metal sheets and winding them in multiple layers. In the catalytic converter metal carrier, the corrugated sheet and the flat plate are diffusion-bonded by press fitting them into a metal outer cylinder and heat-treating them, and the inner circumference of the outer cylinder and the outer circumference of the core are joined with a brazing material. And
The above-mentioned core in which a low-rise preventive agent is attached to the inner periphery of the outer cylinder on the exhaust gas inflow side from the joint portion between the outer cylinder and the core, and is attached to the outer periphery of the outer cylinder on the exhaust gas outflow side outer periphery. , And is press-fitted into the outer cylinder from the exhaust gas inflow side .
[0009]
And the invention which concerns on Claim 2 piles up corrugated board and flat plate of a metal thin plate alternately, winds a low foil material around the central part outer periphery which shape | molded these by winding in multiple, These were made from metal In the metal carrier of the catalytic converter in which the corrugated sheet and the flat plate are diffusion-bonded by press-fitting into the outer cylinder and heat-treated, and the outer circumference of the outer cylinder and the outer circumference of the core are joined with a brazing material. A low rise preventive agent is attached to the inner periphery of the outer cylinder on the exhaust gas inflow side from the joint part to the outer periphery and the outer periphery of the core on the exhaust gas outflow side from the joint part of the outer tube and the core, respectively. The core, in which the raw foil material is wound around the outer periphery of the central part, is press-fitted from the exhaust gas inflow side into the outer cylinder from the rear side .
[0012]
(Function)
According to the metal carrier according to claim 1, the brazing material melted by the heat treatment at the time of production tries to rise to the exhaust gas inflow side of the core by capillary action, but the brazing material is blocked by the anti-rolling-up agent, Low rise to the exhaust gas inflow side of the core is prevented.
[0013]
And, according to the metal carrier according to claim 2 , during the heat treatment in the manufacturing process, the brazing foil material melts and the brazing material tends to flow out to the exhaust gas inflow side and the exhaust gas outflow side of the core by capillary action. The brazing material is blocked by the anti-rolling-up agent, and further outflow is prevented.
Further, when the core is press-fitted into the outer cylinder, the anti-roll-up agent is not covered with the raw foil material, so that the central portion of the core can be securely brazed to the inner periphery of the outer cylinder.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
1 and 2 show an embodiment of a metal carrier according to claim 1 , wherein 15 is a cylindrical outer cylinder formed of SUS430 ferritic stainless steel, and 17 is an Fe-Cr-Al ferritic stainless steel. A strip-shaped corrugated plate 19 and a flat plate 21 made of foil material are alternately stacked, and a core having a circular cross section formed by winding these in multiple layers. The inner diameter m of the outer cylinder 15 is smaller than the outer diameter n of the core 17. Has been.
[0016]
As in the case of the metal carrier 11 shown in FIG. 6, the metal carrier 23 according to this embodiment also has a core 17 in which a Ni low foil material 25 is wound around the outer periphery of the rear side (exhaust gas outlet side) 17a as shown in FIG. Are pressed into the outer cylinder 15 from the front side (exhaust gas inflow side) 17b, and then heated in a vacuum state to diffusely bond the corrugated sheet 19 and the flat plate 21, and the inner circumference of the outer cylinder 15 and the core 17 In this embodiment, prior to the press-fitting of the core 17 into the outer cylinder 15, the front side (exhaust gas inflow side) 15a from the joint part of the outer cylinder 15 and the core 17 is manufactured in this embodiment. The low rise prevention agent 27 is applied to the inner circumference of the outer cylinder 15 in a strip shape over the entire circumference.
[0017]
Thus, examples of the anti-roll-up agent 27 include a titanium oxide solution and a turbid liquid. In this embodiment, specifically, a stop-off material (product “Green Stop-off”) manufactured by US Wall Kornomoy is used. The green stop-off is used as an anti-roll-up agent 27 and is well known as a molten metal flow prevention and heat resistant marker on the metal surface.
[0018]
The application amount and application width of the roll-up preventing agent 27 are appropriately selected according to the volume of the metal carrier to be manufactured and the capacity of the low foil material 25.
Since the metal carrier 23 according to the present embodiment is configured in this way, the brazing material 25-1 melted by the heat treatment during its manufacture as shown in FIG. 2 moves up to the front side 17b of the core 17 by capillary action. However, the brazing material 25-1 is blocked by the roll-up preventing agent 27 applied to the inner periphery of the outer cylinder 15, and the roll-up to the front side 17b of the core 17 is prevented.
[0019]
Therefore, according to the present embodiment, partial joining of the outer cylinder 15 and the front side 17b of the core 17 is eliminated, and as a result, the core 17 is prevented from falling off.
3 and 4 show an embodiment of the metal carrier according to claim 2 , in which 29 is an outer cylinder formed of the same material as the outer cylinder 15, and 31 is alternately stacked like the core 17. The outer cylinder 29 has an inner diameter m smaller than the outer diameter n of the core 31. The core is formed by winding the corrugated sheet 19 and the flat plate 21 in multiple layers.
[0020]
As in the case of the metal carrier 13 shown in FIG. 8, the metal carrier 33 according to the present embodiment removes the core 31 in which the low foil material 25 is wound around the outer periphery of the center portion from the front side (exhaust gas inflow side) 31 a. After press-fitting into the cylinder 29 from the rear side (exhaust gas outflow side) 29b , these are heated in a vacuum state to diffusely bond the corrugated sheet 19 and the flat plate 21, and the inner circumference of the outer cylinder 29 and the outer circumference of the core 31 are connected. As shown in FIG. 3, in the present embodiment, prior to press-fitting of the core 31 into the outer cylinder 29, the present embodiment is arranged on the front side (exhaust gas inflow) from the joint portion between the outer cylinder 29 and the core 31. Side) 29a, and the outer periphery of the core 31 on the rear side (exhaust gas outflow side) 31b from the joint portion, the low rise prevention agents 35, 37 having the same components as the low rise prevention agent 27, Each was applied in a strip over the entire circumference Than is.
[0021]
In the present embodiment, the application amount and application width of the anti-roll-up agents 35 and 37 are appropriately selected according to the volume of the metal carrier to be manufactured and the capacity of the low foil material 25.
Since the metal carrier 33 according to the present embodiment is configured in this way, as shown in FIG. 4, during the heat treatment in the manufacturing process, the brazing foil material 25 melts and the brazing material 25-1 becomes a core due to capillary action. The brazing material 25-1 is applied to the inner periphery of the outer cylinder 29 and the lowering prevention agent 37 applied to the outer periphery of the core 31. Therefore, further outflow is prevented.
[0022]
Therefore, according to this embodiment, partial joining of the outer cylinder 29 and the front side of the core 31 and the 31a rear side 31b is eliminated, and as a result, it is possible to prevent the core 31 from dropping off. It was.
Further, as described above, in the present embodiment, the low rise preventing agents 35 and 37 are applied to the inner periphery of the front side 29a of the outer cylinder 29 and the outer periphery of the rear side 31b of the core 31, and the core 31 is moved to the front side ( Since the exhaust gas inflow side) 31a is press-fitted into the outer cylinder 29 from the rear side (exhaust gas outflow side) 29b , when the core 31 is press-fitted into the outer cylinder 29, the low rising prevention agents 35 and 37 are covered with the low foil material 25. Therefore, it is possible to reliably braze the central portion of the core 31 to the inner periphery of the outer cylinder 29.
[0023]
In each of the above embodiments, the flat plate 21 forming the cores 17 and 31 is a flat strip-shaped metal thin plate. However, the flat plate 21 is a flat plate with small waves whose crest height is sufficiently smaller than the corrugated plate 19. Also good.
[0024]
【The invention's effect】
As described above, according to the metal carrier of the first aspect, the brazing material melted by the heat treatment at the time of manufacture tends to rise to the exhaust gas inflow side of the core due to the capillary phenomenon. Therefore, it is possible to prevent the cell from falling off the core by eliminating partial joining between the outer cylinder and the exhaust gas inflow side of the core.
[0025]
According to the metal carrier of the second aspect, the brazing material melted by the heat treatment at the time of manufacture tends to flow out to the exhaust gas inflow side or the exhaust gas outflow side of the core. Further outflow is prevented, and the partial connection between the outer cylinder and the exhaust gas inflow side or exhaust gas outflow side of the core is eliminated, and it is possible to prevent the core cell from dropping out.
Also, upon stuffing the core into the outer cylinder, since low migration prevention agent is not entirely overlying low foil member, it is possible to make securely brazed central portion of the core on the inner periphery of the outer cylinder .
[Brief description of the drawings]
FIG. 1 is a perspective view of an outer cylinder and a core of a metal carrier according to an embodiment of claim 1 ;
FIG. 2 is a perspective view of a metal carrier according to an embodiment of claim 1 ;
3 is a perspective view of an outer cylinder and a core of a metal carrier according to an embodiment of claim 2. FIG.
4 is a perspective view of a metal carrier according to an embodiment of claim 2. FIG.
FIG. 5 is a perspective view of an outer cylinder and a core of a conventional metal carrier.
FIG. 6 is a perspective view of a conventional metal carrier.
FIG. 7 is a perspective view of an outer cylinder and a core of another conventional metal carrier.
FIG. 8 is a perspective view of another conventional metal carrier.
9 is an explanatory view showing the rising of the brazing material during the heat treatment of the metal carrier shown in FIG.
10 is an explanatory view showing the rising of the brazing material during the heat treatment of the metal carrier shown in FIG.
FIG. 11 is a perspective view of an exhaust gas inflow side of a core where cell dropping has occurred.
[Explanation of symbols]
15, 29 Outer cylinder 17, 31 Core 19 Corrugated plate 21 Flat plate 23, 33 Metal carrier 25 Low foil material 25-1 Low material 27, 35, 37 Low rise prevention agent

Claims (2)

金属製薄板の波板（１９）と平板（２１）を交互に重ね、これらを多重に巻回して成形したコア（１７）の排ガス流出側（１７ａ）外周にロー箔材（２５）を巻回し、これらを金属製の外筒（１５）内に圧入して熱処理することにより波板（１９）と平板（２１）を拡散接合させると共に、外筒（１５）の内周とコア（１７）の外周をロー材（２５-1）で接合した触媒コンバータのメタル担体に於て、
上記外筒（１５）とコア（１７）との接合部位より排ガス流入側（１５ａ）の外筒（１５）の内周にロー上がり防止剤（２７）を全周に亘って帯状に付着し、排ガス流出側（１７ａ）外周にロー箔材（２５）を巻回した上記コア（１７）を、その排ガス流入側（１７ｂ）から外筒（１５）内に圧入させたことを特徴とする触媒コンバータのメタル担体。Metal foil corrugated sheets (19) and flat plates (21) are alternately stacked, and a low foil material (25) is wound around the exhaust gas outflow side (17a) outer periphery of a core (17) formed by winding these multiple times. The corrugated sheet (19) and the flat plate (21) are diffusion-bonded by press-fitting them into a metal outer cylinder (15) and heat-treated, and the inner periphery of the outer cylinder (15) and the core (17) In the metal carrier of the catalytic converter whose outer periphery is joined with a brazing material (25-1),
A low rise prevention agent (27) is attached to the inner circumference of the outer cylinder (15) on the exhaust gas inflow side (15a ) from the joint portion between the outer cylinder (15) and the core (17) in a belt shape over the entire circumference , Catalytic converter characterized in that the core (17) in which a raw foil material (25) is wound around the exhaust gas outflow side (17a) is press-fitted into the outer cylinder (15) from the exhaust gas inflow side (17b). Metal carrier. 金属製薄板の波板（１９）と平板（２１）を交互に重ね、これらを多重に巻回して成形したコア（３１）の中央部外周にロー箔材（２５）を巻回し、これらを金属製の外筒（２９）内に圧入して熱処理することにより波板（１９）と平板（２１）を拡散接合させると共に、外筒（２９）の内周とコア（３１）の外周をロー材（２５A thin foil corrugated sheet (19) and a flat plate (21) are alternately stacked, and the foil (25) is wound around the outer periphery of the central part (31) of the core (31) formed by wrapping them in multiple layers. The corrugated sheet (19) and the flat plate (21) are diffusion-bonded by press-fitting into the made outer cylinder (29) and heat-treated, and the inner periphery of the outer cylinder (29) and the outer periphery of the core (31) are brazed. (25 -1-1 ）で接合した触媒コンバータのメタル担体に於て、) In the catalytic converter metal carrier joined in
上記外筒（２９）とコア（３１）との接合部位より排ガス流入側（２９ａ）の外筒（２９）の内周と、外筒（２９）とコア（３１）との接合部位より排ガス流出側（３１ｂ）のコア（３１）の外周に、夫々、ロー上がり防止剤（３５，３７）を全周に亘って帯状に付着し、中央部外周にロー箔材（２５）を巻回した上記コア（３１）を、その排ガス流入側（３１ａ）から外筒（２９）内にそのリヤ側（２９ｂ）から圧入させたことを特徴とする触媒コンバータのメタル担体。Exhaust gas outflow from the inner periphery of the outer cylinder (29) on the exhaust gas inflow side (29a) from the joint part between the outer cylinder (29) and the core (31) and from the joint part between the outer cylinder (29) and the core (31). In the above, the low rise prevention agent (35, 37) is attached to the outer periphery of the core (31) on the side (31b) over the entire periphery, and the low foil material (25) is wound around the outer periphery of the central portion. A metal carrier for a catalytic converter, wherein the core (31) is press-fitted from the exhaust gas inflow side (31a) into the outer cylinder (29) from the rear side (29b).
JP2000017166A 2000-01-26 2000-01-26 Metal carrier for catalytic converter Expired - Fee Related JP4132531B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7947056B2 (en) 2001-01-18 2011-05-24 Boston Scientific Scimed, Inc. Steerable sphincterotome and methods for cannulation, papillotomy and sphincterotomy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7947056B2 (en) 2001-01-18 2011-05-24 Boston Scientific Scimed, Inc. Steerable sphincterotome and methods for cannulation, papillotomy and sphincterotomy

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