JP2007016636A - Catalyst converter case and method for manufacturing same - Google Patents

Catalyst converter case and method for manufacturing same Download PDF

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JP2007016636A
JP2007016636A JP2005196872A JP2005196872A JP2007016636A JP 2007016636 A JP2007016636 A JP 2007016636A JP 2005196872 A JP2005196872 A JP 2005196872A JP 2005196872 A JP2005196872 A JP 2005196872A JP 2007016636 A JP2007016636 A JP 2007016636A
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catalytic converter
workpiece
funnel
shape
converter case
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JP4624878B2 (en
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Etsuo Kosaka
悦雄 小坂
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Yumex Corp
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Yumex Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a catalyst converter capable of shortening a welding work time and increase strength, and a method for manufacturing the same. <P>SOLUTION: The catalyst converter case 1 stores a catalyst main body 4 converting exhaust gas of an internal combustion engine. The catalyst converter case 1 is provided with a tubular case main body 2 storing the catalyst main body 4 and a funnel part 3 connected to the case main body part 2. The funnel part 3 has a duct line formed in a curved shape and is formed by forming a sheet of metal panel into a tubular shape and welding end parts 3c, 3d on both sides in a circumference direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、触媒コンバータケースおよびその製造方法に関する。   The present invention relates to a catalytic converter case and a manufacturing method thereof.

従来から自動車のエンジンから排出される排気ガスは、エキゾーストマニホールドの下流に配置された触媒コンバータによって有害成分が浄化されている。触媒コンバータは、排気ガスの浄化を行う触媒本体を触媒コンバータケースに内設し、排気流路に配設されてなる。触媒コンバータケースは、例えば、特許文献1に開示されているように、入口と出口の内径が相違し、さらに、その入口と出口の向きが相違している場合、2枚の金属製プレス成形品を合致させて筒状に形成し、突き合わせ箇所を溶接して漏斗状に形成されている。
特開平9−273417号公報(段落0023〜0027、図6および図7)
Conventionally, harmful components of exhaust gas discharged from automobile engines have been purified by a catalytic converter disposed downstream of the exhaust manifold. The catalytic converter has a catalyst main body for purifying exhaust gas in a catalytic converter case and is disposed in an exhaust passage. For example, as disclosed in Patent Document 1, the catalytic converter case has two metal press-formed products when the inner diameters of the inlet and the outlet are different and the directions of the inlet and the outlet are different. Are formed into a cylindrical shape, and the butted portions are welded to form a funnel shape.
JP-A-9-273417 (paragraphs 0023 to 0027, FIGS. 6 and 7)

しかしながら、前記特許文献1に記載された触媒コンバータケースでは、漏斗部が、2枚の金属製板材(半割上部および半割下部)を湾曲状のプレス成形品に形成して、折り曲げ成形した周方向の両側の端部をそれぞれ筒状に合致させて溶接することによって形成している。このような触媒コンバータケースを溶接する場合には、金属製板材の枚数に応じて接合する箇所が増加することにより、溶接箇所が増えるため、溶接作業時間およびコストが増加するとともに、強度が低減するという問題点があった。
また、触媒コンバータケースの漏斗部は、半割上部と半割下部との2つに分割されたワークをそれぞれ筒状に合致させて、その形が崩れないように固定した後に、溶接作業を行っている。この溶接作業時には、半割上部と半割下部とが互いにずれないように保持しなければならないため、組み立てるときの作業性が悪いという問題点があった。
However, in the catalytic converter case described in Patent Document 1, the funnel portion is formed by bending two metal plate materials (an upper half and a lower half) into a curved press-molded product, and then bent. The end portions on both sides in the direction are respectively welded in a cylindrical shape. When such a catalytic converter case is welded, the number of places to be joined increases according to the number of metal plate materials, and the number of places to be welded increases. Therefore, the welding operation time and cost increase, and the strength decreases. There was a problem.
In addition, the funnel part of the catalytic converter case is welded after the work divided into two parts, the upper half and the lower half, is aligned with each other and fixed so that the shape does not collapse. ing. During this welding operation, the upper half and the lower half must be held so that they do not deviate from each other, so that there is a problem that workability during assembly is poor.

そこで、本発明は、前記従来技術の問題点を解決するためになされたものであり、本発明の課題は、溶接作業時間を短縮し強度を向上させることができる触媒コンバータケースおよびその製造方法を提供することにある。   Therefore, the present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a catalytic converter case that can shorten welding work time and improve strength, and a method for manufacturing the same. It is to provide.

前記課題を解決するために、請求項1に記載の触媒コンバータケースは、内燃機関の排気ガスの浄化を行う触媒本体を収納する触媒コンバータケースであって、前記触媒本体が収納される筒状のケース本体部と、前記ケース本体部に接続される漏斗部と、を備え、前記漏斗部は、管路が湾曲形状に形成されるとともに、1枚の金属板を筒状に形成し、その周方向の両側の端部が溶接されてなることを特徴する。   In order to solve the above-mentioned problem, the catalytic converter case according to claim 1 is a catalytic converter case that houses a catalyst body that purifies exhaust gas of an internal combustion engine, and has a cylindrical shape that houses the catalyst body. A case main body, and a funnel connected to the case main body. The funnel has a pipe formed in a curved shape and a single metal plate formed in a cylindrical shape. It is characterized in that ends on both sides in the direction are welded.

請求項1に記載の本発明によれば、触媒コンバータケースは、漏斗部が1枚の金属板を筒状に形成されてなることにより、漏斗部を筒状に形成した際に互いに接合して溶接する箇所が少なくて済むため、強度を向上させることができる。さらに、その漏斗部が1枚の金属板からなることにより、その接合箇所を溶接加工する際に、保持する箇所が少なくて済むため、漏斗部を固定して保持する作業が容易となる。その接合箇所を溶接する場合には、溶接する箇所が周方向の両側の端部の1箇所となる。その結果、漏斗部は、溶接箇所(接合箇所)が少ない分だけ、溶接作業時間が短縮されるため、触媒コンバータケースの製造時間およびコストを低減させることができる。このように形成された漏斗部は、管路が湾曲形状に形成されていることによって、配置される周囲のレイアウトに対応させて配管することができる。   According to the first aspect of the present invention, the catalytic converter case is formed such that the funnel portion is formed of a single metal plate in a cylindrical shape so that the funnel portion is joined to each other when the funnel portion is formed in a cylindrical shape. Since there are few places to weld, strength can be improved. Further, since the funnel portion is made of a single metal plate, the number of locations to be held is small when welding the joint location, and therefore the operation of fixing and holding the funnel portion is facilitated. When welding the joining location, the location to be welded is one location on both ends in the circumferential direction. As a result, the funnel portion can reduce the manufacturing time and cost of the catalytic converter case because the welding operation time is reduced by the amount of welding points (joining points). The funnel portion formed in this way can be piped in correspondence with the surrounding layout where the conduit is formed in a curved shape.

請求項2に記載の触媒コンバータケースは、請求項1に記載の触媒コンバータケースであって、前記漏斗部は、板金プレス加工により筒状に折り曲げ成形されるとともに、前記端部は、前記湾曲形状に形成した内周面側に形成されていることを特徴とする。   The catalytic converter case according to claim 2 is the catalytic converter case according to claim 1, wherein the funnel portion is bent into a cylindrical shape by sheet metal pressing, and the end portion has the curved shape. It is formed in the inner peripheral surface side formed in this.

請求項2に記載の本発明によれば、漏斗部の周方向の両側の端部は、湾曲形状に形成した内周面側に形成され、その漏斗部における管路方向の最短距離となる位置に形成されたことにより、溶接箇所の長さが短くなるため、溶接作業時間が短縮されて、短時間で製造できるようになる。その結果、製造時間や溶接棒などのコストが削減されるため、触媒コンバータケースの製造コストを低減させることができる。   According to this invention of Claim 2, the edge part of the both sides of the circumferential direction of a funnel part is formed in the internal peripheral surface side formed in the curve shape, and the position used as the shortest distance of the pipe line direction in the funnel part Since the length of the welding location is shortened, the welding operation time is shortened, and the manufacturing can be performed in a short time. As a result, the manufacturing time and the cost of welding rods are reduced, so that the manufacturing cost of the catalytic converter case can be reduced.

請求項3に記載の触媒コンバータケースの製造方法は、請求項1または請求項2に記載の触媒コンバータケースの製造方法であって、前記漏斗部は、前記金属板からなる1枚のワークに湾曲面状部分を形成する絞り加工する絞り工程と、前記ワークの余分な部分を切り取る切除加工をする切除工程と、前記ワークを前記管路方向に向いて略U字状に曲げ加工する曲げ工程と、前記ワークを筒状に形成して周方向の両側の端部同士を合致させる合わせ工程と、前記端部を溶接する溶接工程と、を含む工程により製造されることを特徴とする。   The manufacturing method of the catalytic converter case according to claim 3 is the manufacturing method of the catalytic converter case according to claim 1 or 2, wherein the funnel portion is curved into one workpiece made of the metal plate. A drawing step for drawing to form a planar portion, a cutting step for cutting off an excess portion of the workpiece, and a bending step for bending the workpiece into a substantially U-shape toward the pipe line; The method is characterized in that the workpiece is manufactured in a process including a matching process of forming the workpiece into a cylindrical shape and matching ends on both sides in the circumferential direction and a welding process of welding the ends.

請求項3に記載の本発明によれば、1枚のワークを絞り加工、切除加工、および曲げ加工して筒状に形成し、周方向の両側の端部同士を突き合わせてからその両側の端部を溶接することにより、前記両側の端部を溶接する箇所が少なくて済む。その結果、溶接作業時間が短縮されるとともに、溶接箇所(接合箇所)が少ない分だけ漏斗部の強度が向上される。また、ワークは、筒状に形成した周方向の両側の端部同士を合致させてからその端部を溶接することによって、漏斗部内に発生するコンタミ(微細なゴミ)を減少させることができる。   According to the third aspect of the present invention, a single workpiece is drawn, cut, and bent to form a cylinder, the ends on both sides in the circumferential direction are butted together, and the ends on both sides By welding the portions, the number of locations where the end portions on both sides are welded is small. As a result, the welding operation time is shortened, and the strength of the funnel portion is improved by the amount of welding points (joining points). Moreover, the workpiece | work can reduce the contamination (fine dust) which generate | occur | produces in a funnel part by matching the edge parts of the both sides of the circumferential direction formed in the cylinder shape, and welding that edge part.

本発明の触媒コンバータケースおよびその製造方法によれば、漏斗部を1枚の金属板から形成することにより、溶接箇所を少なくすることができるため、溶接作業時間を短縮するとともに、強度を向上させることができる。   According to the catalytic converter case and the manufacturing method thereof of the present invention, since the funnel portion is formed from a single metal plate, the number of welding points can be reduced, so that the welding operation time is shortened and the strength is improved. be able to.

次に、図1〜図7を参照しながら発明を実施するための最良の形態(以下「実施形態」という)を説明する。
以下、本発明の実施形態の一例として、触媒コンバータのケース本体部の入口側(上流側)に漏斗部を設けた場合を例に挙げて説明する。
図1は、本発明の実施形態に係る触媒コンバータケースを示す拡大正面図である。
Next, the best mode for carrying out the invention (hereinafter referred to as “embodiment”) will be described with reference to FIGS.
Hereinafter, as an example of an embodiment of the present invention, a case where a funnel portion is provided on the inlet side (upstream side) of the case main body portion of the catalytic converter will be described as an example.
FIG. 1 is an enlarged front view showing a catalytic converter case according to an embodiment of the present invention.

<触媒コンバータの構成>
図1に示すように、触媒コンバータCは、ガソリンや軽油などを燃料とするエンジン(内燃機関)の排気ガス中に含まれるCO,HC,NOXなどを触媒本体4によって所定のレベルまで低減させる装置である。この触媒コンバータCは、エンジンからマニホールド(図示せず)と排気管5とを介して送られて来た排気ガスを、触媒本体4を通過させることで浄化して、その排気ガス中に含まれる有害成分を除去してから最終的に大気中に放出されるものである。触媒コンバータCは、前記触媒本体4と、この触媒本体4を内設したケース本体部2と、このケース本体部2の開口端部2aに設けられる漏斗部3とを備えてなる。
<Composition of catalytic converter>
As shown in FIG. 1, the catalytic converter C reduces CO, HC, NO x and the like contained in the exhaust gas of an engine (internal combustion engine) using gasoline, light oil or the like as fuel to a predetermined level by the catalyst body 4. Device. The catalytic converter C purifies the exhaust gas sent from the engine via the manifold (not shown) and the exhaust pipe 5 by passing through the catalyst body 4 and is contained in the exhaust gas. After removing harmful components, it is finally released into the atmosphere. The catalytic converter C includes the catalyst main body 4, a case main body portion 2 in which the catalyst main body 4 is provided, and a funnel portion 3 provided at an open end 2 a of the case main body portion 2.

<触媒本体の構成>
前記触媒本体4は、内燃機関の排気ガスの浄化を行うものである。この触媒本体4は、例えば、モノリス型三元触媒コンバータからなり、マット7を介して触媒コンバータケース1のケース本体部2内に設置されている。なお、触媒本体4は、排気ガスの除害効果を有するものであれば、他のものであってもよく、また、1つであっても、複数であってもよく、特に限定されない。
<Composition of catalyst body>
The catalyst body 4 purifies exhaust gas from an internal combustion engine. The catalyst body 4 is composed of, for example, a monolith type three-way catalytic converter, and is installed in the case body 2 of the catalyst converter case 1 via a mat 7. The catalyst main body 4 may be other as long as it has an exhaust gas detoxifying effect, and may be one or plural, and is not particularly limited.

<マットの構成>
マット7は、触媒本体4の円周方向の外周部を巻くように覆って保護し、エンジンなどからの振動が触媒本体4に伝達されないように吸収するための部材であり、触媒本体4を位置ずれしないように保持して、ケース本体部2内に装着される。このマット7は、断熱材によって形成されて、触媒本体4の金属部分がエンジンからの熱によって収縮および膨張を繰り返した場合にひずみなどが発生することを解消するとともに、触媒本体4の放熱を抑制することもできるように配設されている。
<Composition of mat>
The mat 7 is a member that covers and protects the outer peripheral portion of the catalyst body 4 so as to be wound, and absorbs vibration from the engine and the like so that the vibration is not transmitted to the catalyst body 4. The case body 2 is mounted so as not to be displaced. The mat 7 is formed of a heat insulating material to eliminate the occurrence of distortion and the like when the metal portion of the catalyst body 4 repeatedly contracts and expands due to heat from the engine, and suppresses heat dissipation of the catalyst body 4. It is arranged so that it can also be done.

<触媒コンバータケースの構成>
触媒コンバータケース1は、触媒本体4を収納するための筒状(管状)のケース体であり、ケース本体部2と、漏斗部3とを備えている。この触媒コンバータケース1には、例えば、入口側に排気管5が接続され、出口側に排気管6が接続されて、排気ガスが流れる排気流路Rを形成している。
<Composition of catalytic converter case>
The catalytic converter case 1 is a cylindrical (tubular) case body for housing the catalyst main body 4, and includes a case main body portion 2 and a funnel portion 3. In the catalytic converter case 1, for example, an exhaust pipe 5 is connected to the inlet side, and an exhaust pipe 6 is connected to the outlet side, thereby forming an exhaust flow path R through which exhaust gas flows.

<ケース本体部の構成>
ケース本体部2は、前記触媒本体4を収納する円筒状のものからなり、例えば、ステンレス鋼、鋼、マグネシウム系合金などの金属材料によって形成されている。このケース本体部2の入口側および出口側の開口端部2a,2bは、前記マット7の厚さ分程度縮径して形成されている。
入口側の開口端部2aは、漏斗部3の大径部3aに嵌合して溶接またはろう付けによって固定されている。
出口側の開口端部2bは、下流側に設置されるマフラー(図示せず)に連通した排気管6に嵌合されて溶接またはろう付けによって固定されている。
<Configuration of the case body>
The case main body 2 is formed of a cylindrical shape that houses the catalyst main body 4, and is formed of a metal material such as stainless steel, steel, or a magnesium alloy. The opening end portions 2 a and 2 b on the inlet side and the outlet side of the case main body portion 2 are formed by reducing the diameter by the thickness of the mat 7.
The opening end 2a on the inlet side is fitted into the large diameter portion 3a of the funnel portion 3 and fixed by welding or brazing.
The outlet end 2b on the outlet side is fitted into an exhaust pipe 6 communicating with a muffler (not shown) installed on the downstream side and fixed by welding or brazing.

<漏斗部の構成>
図2は、本発明の実施形態に係る触媒コンバータケースの漏斗部を示す拡大斜視図である。
図1に示す漏斗部3は、前記ケース本体部2の開口端部2a,2bに一体に固定して備えられる部材であり、例えば、ケース本体部2と排気管5との間に介在される漏斗状の金属製筒状部材からなる。図2に示すように、この漏斗部3は、例えば、入口側に小径部3bが形成され、出口側に大径部3aが形成されて、大径部3aと小径部3bとが互いに直交方向に開口するように湾曲形成されており、大径部3a側が小径部3bより大径となって、拡径した状態に形成されている。図1に示すように、漏斗部3は、小径部3bが、ケース本体部2(大径部3a)の軸芯線O−Oからずれた位置に形成されるとともに、排気流路(管路)Pが湾曲形状に形成されて、開口方向を変えて形成されている。このため、排気管5からこの漏斗部3を介してケース本体部2へ流れる排気流路Pは、例えば、90度に湾曲してその向きを変えたエルボ形状またはベンド形状に形成されている。漏斗部3は、1枚の金属板を板金プレス加工により筒状に折り曲げ成形されるとともに、その折り曲げ成形した周方向の両側の端部3c,3dが接合し溶接して固定されている。この漏斗部3は、一端部に形成された前記大径部3aが、ケース本体部2の開口端部2aに溶接またはろう付けによって接続され、他端部に形成された前記小径部3bが、排気管5に溶接またはろう付けによって接続されている。
<Composition of funnel>
FIG. 2 is an enlarged perspective view showing a funnel portion of the catalytic converter case according to the embodiment of the present invention.
The funnel portion 3 shown in FIG. 1 is a member that is integrally fixed to the opening end portions 2 a and 2 b of the case body portion 2, and is interposed between the case body portion 2 and the exhaust pipe 5, for example. It consists of a funnel-shaped metal cylindrical member. As shown in FIG. 2, the funnel portion 3 has, for example, a small diameter portion 3b formed on the inlet side, a large diameter portion 3a formed on the outlet side, and the large diameter portion 3a and the small diameter portion 3b orthogonal to each other. The large-diameter portion 3a side has a larger diameter than the small-diameter portion 3b, and is formed in an expanded state. As shown in FIG. 1, the funnel portion 3 is formed at a position where the small diameter portion 3 b is displaced from the axial center line OO of the case main body portion 2 (large diameter portion 3 a), and an exhaust flow path (pipe). P is formed in a curved shape, and the opening direction is changed. For this reason, the exhaust flow path P flowing from the exhaust pipe 5 to the case main body 2 through the funnel portion 3 is formed in, for example, an elbow shape or a bend shape which is bent at 90 degrees and changed its direction. The funnel portion 3 is formed by bending a single metal plate into a cylindrical shape by sheet metal pressing, and the end portions 3c and 3d on both sides in the circumferential direction that are bent and formed are joined and welded to be fixed. The funnel portion 3 has the large-diameter portion 3a formed at one end thereof connected to the opening end portion 2a of the case body portion 2 by welding or brazing, and the small-diameter portion 3b formed at the other end portion. It is connected to the exhaust pipe 5 by welding or brazing.

大径部3aは、径がケース本体部2に合致する寸法に形成されている。
小径部3bは、径が排気管5に合致する寸法に形成されるとともに、その排気管5の開口端に合わせて大径部3aに直交する方向に開口している。その結果、漏斗部3がエルボ形状またはベンド形状に形成されている。
なお、小径部3bが開口している向きは、触媒コンバータケース1の周囲に設置されている機器などのレイアウトに応じて、漏斗部3を適宜な角度に湾曲させて向ければよい。また、小径部3bの径は、排気管5に合わせて形成すればよく、大径部3aと同じ寸法であってもよい。
The large diameter portion 3 a is formed to have a diameter that matches the case main body portion 2.
The small diameter portion 3 b is formed to have a diameter that matches the exhaust pipe 5 and opens in a direction orthogonal to the large diameter portion 3 a in accordance with the opening end of the exhaust pipe 5. As a result, the funnel portion 3 is formed in an elbow shape or a bend shape.
Note that the direction in which the small diameter portion 3b is opened may be directed by curving the funnel portion 3 at an appropriate angle in accordance with the layout of equipment installed around the catalytic converter case 1. Moreover, the diameter of the small diameter part 3b should just be formed according to the exhaust pipe 5, and may be the same dimension as the large diameter part 3a.

周方向の端部3c,3dは、図2に示すように、1枚の金属板からなる漏斗部3を筒状に曲げ加工したときに互いに接合される箇所であり、外側に向けて突出し、正面視して円弧状のフランジ形状に形成されている。この端部3c,3dは、漏斗部3における排気流路Pでの最短距離となる位置に形成されて、溶接する溶接箇所(接合箇所)Aの長さが短くなるように、漏斗部3を湾曲形状に形成した内周面側に形成されている。   The end portions 3c and 3d in the circumferential direction are locations where the funnel portion 3 made of a single metal plate is joined to each other when bent into a cylindrical shape, as shown in FIG. It is formed in an arcuate flange shape when viewed from the front. The end portions 3c and 3d are formed at a position that is the shortest distance in the exhaust flow path P in the funnel portion 3 so that the length of the welded portion (joined portion) A to be welded is shortened. It is formed on the inner peripheral surface side formed in a curved shape.

溶接箇所Aは、例えば、前記フランジ形状に形成された端部3c,3dであり、電気抵抗溶接、半自動溶接(MIG溶接)、あるいはタングステン電極溶接(TIG溶接)などによって行われている。このように、端部3c,3dは、漏斗部3から外側に突出したフランジ形状に形成されていることにより、フランジ部を電気抵抗溶接することや、漏斗部3内にスパッタ(飛火傷)によりコンタミ(微細なゴミ)が発生しないように溶接することが可能となる。なお、図1および図2に示す溶接箇所Aは、電気抵抗溶接した場合の一例を示している。   The welding location A is, for example, the end portions 3c and 3d formed in the flange shape, and is performed by electrical resistance welding, semi-automatic welding (MIG welding), tungsten electrode welding (TIG welding), or the like. Thus, the end portions 3c and 3d are formed in a flange shape protruding outward from the funnel portion 3, so that the flange portion is electrically resistance welded or sputtered (flying burns) in the funnel portion 3. It is possible to perform welding so that contamination (fine dust) does not occur. In addition, the welding location A shown in FIG. 1 and FIG. 2 has shown an example at the time of carrying out an electrical resistance welding.

<排気管の構成>
図1に示すように、排気管5,6は、例えば、ステンレス鋼管、鋼管などからなり、レイアウト上直線形状あるいは曲線形状などの適宜な形状に形成されている。
排気管5は、入口側(上流側)が、不図示のエンジンに連通したマニホールド(図示せず)に接続され、出口側(下流側)が前記漏斗部3に接続されて、それぞれ溶接またはろう付けによって固定されている。この排気管5の径は、接続される小径部3bの径に合致させた寸法になっている。
排気管6は、入口側(上流側)がケース本体部2の開口端部2bに接続され、出口側(下流側)がマフラー(図示せず)に接続されて、それぞれ溶接またはろう付けによって固定させている。この排気管6の径は、接続されるケース本体部2の開口端部2bの径に合致させた寸法になっている。
<Exhaust pipe configuration>
As shown in FIG. 1, the exhaust pipes 5 and 6 are made of, for example, a stainless steel pipe, a steel pipe, or the like, and are formed in an appropriate shape such as a linear shape or a curved shape on the layout.
The exhaust pipe 5 has an inlet side (upstream side) connected to a manifold (not shown) communicating with an engine (not shown), and an outlet side (downstream side) connected to the funnel portion 3 for welding or brazing. It is fixed by attaching. The diameter of the exhaust pipe 5 is a size that matches the diameter of the small diameter portion 3b to be connected.
The exhaust pipe 6 has an inlet side (upstream side) connected to the open end 2b of the case body 2 and an outlet side (downstream side) connected to a muffler (not shown), and is fixed by welding or brazing, respectively. I am letting. The diameter of the exhaust pipe 6 is a dimension that matches the diameter of the open end 2b of the case body 2 to be connected.

≪触媒コンバータケースの製造方法≫
次に、図3を主に、図4〜図7を参照しながら本発明の実施形態に係る触媒コンバータケースおよびその製造方法の作用を説明する。
図3は、本発明の実施形態に係る触媒コンバータケースの製造方法を示す工程図である。
≪Method for manufacturing catalytic converter case≫
Next, the operation of the catalytic converter case and the manufacturing method thereof according to the embodiment of the present invention will be described mainly with reference to FIG. 3 and with reference to FIGS.
FIG. 3 is a process diagram showing a method for manufacturing a catalytic converter case according to an embodiment of the present invention.

図3に示すように、触媒コンバータケース1を製造する場合には、まず、ワークWである金属板を絞り加工する絞り工程S1と、ワークWの余分な部分を切り取る切除工程S2と、ワークWを略U字状に曲げ加工する曲げ工程S3と、ワークWを筒状に形成して周方向の端部3c,3d同士を合致させる合わせ工程S4と、周方向の両側の端部3c,3dを溶接する溶接工程S5と、によって漏斗部3を製造した後に、その漏斗部3をケース本体部2に接合する接続工程S6を行うことで完成される。   As shown in FIG. 3, when the catalytic converter case 1 is manufactured, first, a drawing step S1 for drawing a metal plate as the workpiece W, a cutting step S2 for cutting off an excess portion of the workpiece W, and a workpiece W Bending step S3, bending the workpiece W into a cylindrical shape, matching step S4 for matching the circumferential end portions 3c, 3d, and both circumferential end portions 3c, 3d. After the funnel portion 3 is manufactured by the welding step S5 for welding, the connecting step S6 for joining the funnel portion 3 to the case main body portion 2 is completed.

<絞り工程>
図4〜図7を参照して、さらに詳しく各工程を説明する。
図4は、本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は絞り加工したワークの斜視図、(b)はワークの絞り工程時の状態を示すプレス機の要部概略図である。
<Drawing process>
Each step will be described in more detail with reference to FIGS.
4A and 4B are diagrams illustrating a method of manufacturing a catalytic converter case according to an embodiment of the present invention, in which FIG. 4A is a perspective view of a drawn workpiece, and FIG. 4B is a press machine showing a state during a workpiece drawing process. FIG.

まず、絞り工程S1では、図4(b)に示すように、プレス機8の上型側ダイ8aと、パンチ8bおよび保持台8cとの間にワークWを保持し、昇降装置(図示せず)で上型側ダイ8aを降下しワークWをパンチ8bに圧接してドローイング加工を行う。
この絞り工程S1において、パンチ8bは、ワークWを押圧することで、上型側ダイ8aとで1枚の平らなワークWを漏斗状に展開した形状に曲げて絞り加工(プレス成形)して、図4(a)に示すような湾曲面状部分W1をワークWの中心線に略沿って形成する(図1参照)。
First, in the drawing step S1, as shown in FIG. 4B, the workpiece W is held between the upper die 8a of the press 8 and the punch 8b and the holding base 8c, and a lifting device (not shown). ), The upper die 8a is lowered and the workpiece W is pressed against the punch 8b to perform drawing.
In this drawing step S1, the punch 8b presses the workpiece W, and with the upper die 8a, bends one flat workpiece W into a funnel-like shape and performs drawing (press molding). A curved surface portion W1 as shown in FIG. 4A is formed substantially along the center line of the workpiece W (see FIG. 1).

<切除工程>
図5は、本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は切除加工したワークの斜視図、(b)はワークの切除工程時の状態を示すプレス機の要部概略図である。
<Resection process>
5A and 5B are diagrams illustrating a method of manufacturing a catalytic converter case according to an embodiment of the present invention, in which FIG. 5A is a perspective view of a cut workpiece, and FIG. 5B is a press machine illustrating a state during a workpiece cutting step. FIG.

次の切除工程S2では、図5(b)に示すように、プレス機8の昇降装置(図示せず)で上型側トリム・スリット刃8eと下型側ダイ8dとを相対移動させて近接させ、上型側トリム・スリット刃8eによって、図5(a)に示すようなワークWの余分な不要部分W2をスクラップとして切断する切除加工(トリム加工)を行う。
なお、この切除工程S2は、絞り成形前に予め余肉を見込んで切除(ブランキング等)してもよいし、絞り成形後の何れのタイミングで金型またはレーザー切断機等を用いて切除を行ってもよく、切除工程S2を行うタイミングは特に限定されない。
In the next cutting step S2, as shown in FIG. 5 (b), the upper die side trim / slit blade 8e and the lower die side die 8d are moved relative to each other by an elevating device (not shown) of the press machine 8 to approach each other. Then, with the upper mold side trim / slit blade 8e, a cutting process (trim process) for cutting the unnecessary unnecessary portion W2 of the workpiece W as scrap as shown in FIG. 5A is performed.
In this excision step S2, it may be excised (blanking or the like) in advance with the expectation of the surplus before drawing, or at any timing after drawing using a die or a laser cutting machine. The timing for performing the cutting step S2 is not particularly limited.

<曲げ工程>
図6は、本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)はU字状に曲げ加工したワークの斜視図、(b)はワークの曲げ工程時の状態を示すプレス機の要部概略図である。
<Bending process>
6A and 6B are diagrams illustrating a method of manufacturing a catalytic converter case according to an embodiment of the present invention, in which FIG. 6A is a perspective view of a workpiece bent into a U-shape, and FIG. 6B is a state during a bending process of the workpiece. It is the principal part schematic of the press machine which shows.

曲げ工程S3では、図6(b)に示すように、ワークWをパッド8mの上方に配置して、プレス機8の昇降装置(図示せず)でパンチ8fとダイ8gとを相対移動させて近接させることで、ワークWを略U字状に曲げ加工(プレス曲げ加工)する。この曲げ工程S3において、パンチ8fは、昇降装置(図示せず)を上昇させることで、ワークWを管路方向(排気流路P方向)に沿ってU字状に曲げて、図6(a)に示すように、小径部3b(図2参照)をU字状に形成し、大径部3a(図2参照)を略御椀状に形成して、ワークWの小径部3b(図2参照)から大径部3a(図2参照)にかけての中央部分W3を最終的な形状に形成する。   In the bending step S3, as shown in FIG. 6B, the workpiece W is arranged above the pad 8m, and the punch 8f and the die 8g are moved relative to each other by an elevating device (not shown) of the press machine 8. By bringing them close to each other, the workpiece W is bent into a substantially U shape (press bending). In this bending step S3, the punch 8f raises an elevating device (not shown) to bend the workpiece W in a U shape along the pipe line direction (exhaust flow path P direction). ), The small diameter portion 3b (see FIG. 2) is formed in a U-shape, the large diameter portion 3a (see FIG. 2) is formed in a substantially bowl shape, and the small diameter portion 3b (see FIG. 2) of the workpiece W is formed. The central portion W3 from the reference) to the large diameter portion 3a (see FIG. 2) is formed into a final shape.

図7は、本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は両側の端部を曲げ加工してフランジ部を形成したワークの斜視図、(b)はワークの合わせ工程時の状態を示すプレス機の要部概略図である。   7A and 7B are views showing a method for manufacturing a catalytic converter case according to an embodiment of the present invention, wherein FIG. 7A is a perspective view of a workpiece in which flange portions are formed by bending end portions on both sides, and FIG. It is a principal part schematic of the press machine which shows the state at the time of the alignment process of a workpiece | work.

<合わせ工程>
合わせ工程S4では、図7(b)に示すように、ワークWの内側に芯金8jを挿入し、プレス機8の左右の上型8k,8kを互いに接近させて、ワークWの端部W4,W4同士(縁同士)を合致させることで、ワークWを円筒状の漏斗部3の形に曲げ加工(フォーミング加工)する。この合わせ工程S4において、左右の上型8k,8kは、金型面が部分的に漏斗部3の最終形状に略同一形状に形成されており、プレス機8で互いに水平に移動させてワークWの端部W4(図6参照)を押圧することで、ワークWの両側の端部W4を曲げて合わせて、フランジ形状の端部3c,3dを成形するとともに、ワークWの端部W4を最終的な漏斗部3の形に形成する。
<Matching process>
In the aligning step S4, as shown in FIG. 7B, a cored bar 8j is inserted inside the workpiece W, the left and right upper molds 8k, 8k of the press machine 8 are brought close to each other, and an end W4 of the workpiece W is obtained. , W4 are matched (edges) to bend the workpiece W into the shape of the cylindrical funnel portion 3 (forming process). In this alignment step S4, the left and right upper molds 8k, 8k are formed so that the mold surfaces are partially formed in substantially the same shape as the final shape of the funnel portion 3, and are moved horizontally to each other by the press 8. By pressing the end portion W4 (see FIG. 6), the end portions W4 on both sides of the workpiece W are bent and matched to form flange-shaped end portions 3c and 3d, and the end portion W4 of the workpiece W is finally finished. In the shape of a typical funnel 3.

<溶接工程>
溶接工程S5では、図7(a)に示すように、漏斗部3のフランジ形状の端部3c,3dを溶接する。これで、漏斗部3が完成する。このようにして形成された漏斗部3は、図2に示すように、周方向の両側の端部3c,3dが、漏斗部3における排気流路Pの最短距離となる位置に形成されていることにより、周方向の端部3c,3dの長さLが短く形成されている。その結果、溶接箇所Aが短く、短時間で溶接できるようになる。
<Welding process>
In welding process S5, as shown to Fig.7 (a), the flange-shaped edge parts 3c and 3d of the funnel part 3 are welded. This completes the funnel 3. As shown in FIG. 2, the funnel portion 3 formed in this way is formed at a position where the end portions 3 c and 3 d on both sides in the circumferential direction are the shortest distance of the exhaust flow path P in the funnel portion 3. Thus, the length L of the end portions 3c and 3d in the circumferential direction is formed short. As a result, the welding location A is short and can be welded in a short time.

<接続工程>
接続工程S6では、図1に示すように、漏斗部3の大径部3aをケース本体部2に嵌合し、その嵌合箇所を溶接またはろう付けによってしっかりと接合させる。このようにして、触媒コンバータケース1が完成される。
<Connection process>
In connection process S6, as shown in FIG. 1, the large diameter part 3a of the funnel part 3 is fitted to the case main body part 2, and the fitting part is firmly joined by welding or brazing. In this way, the catalytic converter case 1 is completed.

≪実施形態の効果≫
以上のようにして製造された触媒コンバータケース1は、次のような効果を奏する。
(1)図2に示すように、漏斗部3は、溶接箇所Aの長さLを短く形成できることにより、端部3c,3dを溶接する溶接工程S5の溶接作業時間を短縮することができるため、製造コストを低減させることができるとともに、コンタミを減少させることができる。
(2)また、漏斗部3は、溶接箇所Aの長さLが少なく、溶接箇所Aが一箇所であるため、例えば、アーク溶接時に使用する溶接棒を低減させてコストダウンを図ることができる。
(3)漏斗部3は、1枚の金属板から形成されることにより、接合する箇所が1箇所と少ないため、接合部の品質が向上するとともに、漏斗部3全体の強度が向上される。
(4)このように、漏斗部3は、1枚の金属板から形成されて、溶接箇所Aが1箇所であることにより、材料の歩留まりが改善されるとともに、完成時の重量が低減されるため、車両の燃費向上に寄与することができる。
(5)図5(a)、(b)に示す切除工程S2では、完成される漏斗部3(図7(a)参照)が1枚の金属板からなることにより、上型側トリム・スリット刃8eと下型側ダイ8dとによる材料取りが一度で済むため、部品点数が半減されるとともに、作業効率がよい。
<< Effects of Embodiment >>
The catalytic converter case 1 manufactured as described above has the following effects.
(1) As shown in FIG. 2, the funnel portion 3 can shorten the welding operation time in the welding step S5 in which the end portions 3c and 3d are welded by being able to form the length L of the welded portion A short. The manufacturing cost can be reduced and the contamination can be reduced.
(2) Moreover, since the length L of the welding location A is small and the welding location A is one place, the funnel part 3 can reduce the cost by reducing the welding rod used at the time of arc welding, for example. .
(3) Since the funnel part 3 is formed from one metal plate, the number of places to be joined is as small as one place, so that the quality of the joined part is improved and the strength of the entire funnel part 3 is improved.
(4) As described above, the funnel portion 3 is formed from a single metal plate, and since the welding location A is one location, the yield of the material is improved and the weight at the time of completion is reduced. Therefore, it can contribute to the improvement of the fuel consumption of the vehicle.
(5) In the cutting step S2 shown in FIGS. 5 (a) and 5 (b), the completed funnel portion 3 (see FIG. 7 (a)) is made of one metal plate, so that the upper mold side trim slit Since the material removal by the blade 8e and the lower die 8d is only once, the number of parts is reduced by half and the working efficiency is good.

なお、本発明は、前記実施形態に限定されるものではなく、その技術思想の範囲内で種々の改造および変更が可能であり、本発明はこれら改造および変更された発明にも及ぶことは勿論である。以下、その変形例を説明する。   Note that the present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. Of course, the present invention extends to these modifications and changes. It is. Hereinafter, the modification is demonstrated.

≪変形例≫
図8は、本発明の実施形態に係る触媒コンバータケースの製造方法の変形例を示す図であり、ワークの切除位置を示す斜視図である。
例えば、図8に示すように、ワークWを切除する場合(切除工程S2)は、ワークWをU字状に折り曲げてからレーザー加工してしてもよい。すなわち、図3に示す切除工程S2は、曲げ工程S3の後に行ってもよい。このように、曲げ工程S3の後に切除工程S2を行うことにより、漏斗部3が完成したときに、端部3cと端部3dとが合致するように、ワークWの材料取りを正確に行うことができる。
≪Modification≫
FIG. 8 is a view showing a modification of the method for manufacturing the catalytic converter case according to the embodiment of the present invention, and is a perspective view showing a work cutting position.
For example, as shown in FIG. 8, when the workpiece W is cut (cutting step S <b> 2), the workpiece W may be bent into a U shape and then laser processed. That is, the cutting step S2 shown in FIG. 3 may be performed after the bending step S3. Thus, by performing the cutting step S2 after the bending step S3, when the funnel portion 3 is completed, the material of the workpiece W is accurately taken so that the end portion 3c and the end portion 3d match. Can do.

また、前記実施形態では、ワークWを曲げ工程S3で略U字状に曲げ加工してから合わせ工程S4によって一度にワークWを漏斗部3の形状に加工したが、曲げ工程S3と、ワークWを略C字状に曲げる合わせ工程と、ワークWを最終の漏斗部3の形状に形成する絞り仕上げ工程とによって、最終的な形状に段階的に形成するようにしてもよい。
その場合、図6(a)に示す曲げ工程S3でU字状に曲げ加工したワークWを合わせ工程で、図7(b)に示すように、ワークWの内側に芯金8jを挿入し、プレス機8の左右の上型8k,8k(図7(b)参照)を互いに接近させて、ワークWの端部W4,W4同士(縁同士)を合致させることで、ワークWを円筒状のC字状に曲げ加工する。
次に、絞り仕上げ工程で、ワークWの内側に芯金8j(図7(b)参照)を挿入したまま、左右の上型8k,8kを互いに水平に近接させてワークWの端部W4(図6参照)を押圧することで、ワークWの両側の端部W4を曲げて合わせ、フランジ形状の端部3c,3dを成形するとともに、ワークW全体を曲げて最終的な漏斗部3の形にフォーミング加工する。
このように、絞り仕上げ工程を取り入れて、必要に応じてフランジ部の合わせ面および漏斗部3の加工精度を上げるようにしてもよい。
In the above embodiment, the workpiece W is bent into a substantially U shape in the bending step S3, and then the workpiece W is processed into the shape of the funnel portion 3 at the same time in the matching step S4. May be formed stepwise into a final shape by an aligning step of bending the wire W into a substantially C shape and a drawing finishing step of forming the workpiece W into the shape of the final funnel portion 3.
In that case, as shown in FIG. 7 (b), as shown in FIG. 7 (b), the metal core 8j is inserted inside the work W in the step of combining the work W bent into a U shape in the bending step S3 shown in FIG. 6 (a). The upper and lower dies 8k, 8k (see FIG. 7 (b)) of the press machine 8 are brought close to each other, and the ends W4, W4 (edges) of the workpiece W are matched with each other, thereby making the workpiece W cylindrical. Bend into a C shape.
Next, in the drawing finishing step, the left and right upper molds 8k and 8k are placed close to each other in the horizontal direction while the cored bar 8j (see FIG. 7B) is inserted inside the work W, and the end W4 ( 6), the ends W4 on both sides of the workpiece W are bent and matched to form flange-shaped ends 3c and 3d, and the entire workpiece W is bent to form the final funnel portion 3. Forming process.
In this way, a drawing finishing process may be incorporated to improve the processing accuracy of the mating surface of the flange portion and the funnel portion 3 as necessary.

図9は、本発明の実施形態に係る触媒コンバータケースの製造方法の変形例を示す図であり、(a)はフランジ形状に形成した周方向の端部を突き合わせて重ね溶接した状態を示す要部概略図、(b)は突き合わせて形成した周方向の端部を突き合わせ溶接した状態を示す要部概略図、(c)は周方向の端部を重ね溶接した状態を示す要部概略図である。   FIG. 9 is a view showing a modification of the method for manufacturing a catalytic converter case according to the embodiment of the present invention, and FIG. 9A is a view showing a state in which the circumferential ends formed in the flange shape are butted and overlap-welded. (B) is a main part schematic diagram showing a state where the circumferential end portions formed by abutting are butt welded, and (c) is a main part schematic diagram showing a state where the circumferential end portions are overlap-welded. is there.

漏斗部3の端部3c,3dは、図9(a)に示すように、フランジ形状に形成して突き合わせて溶接して固定することに限定されるものではない。なお、このようなフランジ形状からなる端部3c,3dは、その先端をへり継手状にしてアーク溶接などによって溶接してもよい。このような場合であっても、溶接箇所Aが漏斗部3の外側に位置するため、その内側にスパッタが発生することがない。   As shown in FIG. 9A, the end portions 3c and 3d of the funnel portion 3 are not limited to being formed in a flange shape, butted, welded and fixed. Note that the end portions 3c and 3d having such a flange shape may be welded by arc welding or the like with the ends thereof being edge-joint shapes. Even in such a case, since the welding location A is located outside the funnel portion 3, no spatter is generated inside.

前記端部3c,3dは、例えば、図9(b)に示すように、フランジがない端部3c1,3d1を突き合わせたものでもよい。このような場合には、突き合わせた端部3c1,3d1のグルーブの形状をI型突き合わせなどの形状にして、当接面の外側をアーク溶接などによって溶接する。   For example, as shown in FIG. 9B, the end portions 3c and 3d may be formed by abutting end portions 3c1 and 3d1 having no flange. In such a case, the shape of the groove of the butted end portions 3c1 and 3d1 is changed to a shape such as I-type butting, and the outside of the contact surface is welded by arc welding or the like.

また、前記端部3c,3dは、例えば、図9(c)に示すように、端部3c2,3d2を重ねた重ね継手状にしたものでもよい。このような場合には、端部3c2,3d2を重ねて、外側に位置する端部3c2の先端部をアーク溶接などによってすみ肉溶接することによって、溶接箇所Aが漏斗部3の外側になるため、漏斗部3内にスパッタが発生することが防止される。   Further, the end portions 3c and 3d may have a lap joint shape in which the end portions 3c2 and 3d2 are overlapped as shown in FIG. 9C, for example. In such a case, since the end portions 3c2 and 3d2 are overlapped and the tip end portion of the end portion 3c2 located outside is fillet welded by arc welding or the like, the welding location A becomes outside the funnel portion 3. The occurrence of spatter in the funnel portion 3 is prevented.

図10は、本発明の実施形態に係る触媒コンバータケースの変形例を示す図であり、(a)は漏斗部をケース本体部の入口と出口とに配設した一例を示す触媒コンバータケースの正面図、(b)は漏斗部をケース本体部の出口側に配設した一例を示す触媒コンバータケースの拡大断面図である。   FIG. 10 is a view showing a modified example of the catalytic converter case according to the embodiment of the present invention. FIG. 10A is a front view of the catalytic converter case showing an example in which the funnel portion is disposed at the inlet and the outlet of the case main body portion. FIG. 4B is an enlarged cross-sectional view of a catalytic converter case showing an example in which a funnel portion is disposed on the outlet side of the case main body.

前記漏斗部3は、図10(a)に示す漏斗部31,32のように、触媒コンバータケース1の入口と出口とにそれぞれ設けてもよい。漏斗部31の大径部31a,32aに対する小径部31b,32bの角度θ1,θ2は、排気管5,6や周囲の機器などのレイアウトに応じて適宜に形成すればよく、90度のエルボ形状やベンド形状のものに限定されるものではない。なお、大径部31a,32aおよび小径部31b,32bの径は、接続する排気管5,6に一致させて形成すればよい。   The funnel portion 3 may be provided at the inlet and the outlet of the catalytic converter case 1 like the funnel portions 31 and 32 shown in FIG. The angles θ1 and θ2 of the small-diameter portions 31b and 32b with respect to the large-diameter portions 31a and 32a of the funnel portion 31 may be appropriately formed according to the layout of the exhaust pipes 5 and 6 and surrounding devices, and have an elbow shape of 90 degrees. It is not limited to bend-shaped ones. The diameters of the large diameter portions 31a and 32a and the small diameter portions 31b and 32b may be formed so as to coincide with the exhaust pipes 5 and 6 to be connected.

また、図10(b)に示すように、触媒コンバータケース1は、出口側の開口端部2bに漏斗部32のみを設けたものであってもよい。この触媒コンバータケース1の入口側の開口端部2aには、マニホールド9を直接連結したものであってもよい。このようにすることにより、触媒コンバータケース1は、あらゆるレイアウトに対応して配設できるようになる。
なお、前記漏斗部31,32には、貫通孔を穿設して、排気ガス中の酸素の濃度を検出する酸素濃度検出センサ(図示せず)を設けてもよい。
Further, as shown in FIG. 10B, the catalytic converter case 1 may be one in which only the funnel portion 32 is provided at the opening end portion 2b on the outlet side. A manifold 9 may be directly connected to the opening end 2 a on the inlet side of the catalytic converter case 1. By doing so, the catalytic converter case 1 can be disposed corresponding to any layout.
The funnel portions 31 and 32 may be provided with an oxygen concentration detection sensor (not shown) that has a through hole and detects the concentration of oxygen in the exhaust gas.

本発明の実施形態に係る触媒コンバータケースを示す拡大正面図である。It is an enlarged front view which shows the catalytic converter case which concerns on embodiment of this invention. 本発明の実施形態に係る触媒コンバータケースの漏斗部を示す拡大斜視図である。It is an expansion perspective view which shows the funnel part of the catalytic converter case which concerns on embodiment of this invention. 本発明の実施形態に係る触媒コンバータケースの製造方法を示す工程図である。It is process drawing which shows the manufacturing method of the catalytic converter case which concerns on embodiment of this invention. 本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は絞り加工したワークの斜視図、(b)はワークの絞り工程時の状態を示すプレス機の要部概略図である。It is a figure which shows the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, (a) is a perspective view of the workpiece | work which carried out the drawing process, (b) is the principal part outline of the press machine which shows the state at the time of the drawing process of a workpiece | work. FIG. 本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は切除加工したワークの斜視図、(b)はワークの切除工程時の状態を示すプレス機の要部概略図である。It is a figure which shows the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, (a) is a perspective view of the cut workpiece, (b) is the principal part outline of the press machine which shows the state at the time of the workpiece cutting process FIG. 本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)はU字状に曲げ加工したワークの斜視図、(b)はワークの曲げ工程時の状態を示すプレス機の要部概略図である。It is a figure which shows the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, (a) is a perspective view of the workpiece | work bent into U shape, (b) is a press machine which shows the state at the time of the bending process of a workpiece | work. FIG. 本発明の実施形態に係る触媒コンバータケースの製造方法を示す図であり、(a)は両側の端部を曲げ加工してフランジ部を形成したワークの斜視図、(b)はワークの合わせ工程時の状態を示すプレス機の要部概略図である。It is a figure which shows the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, (a) is a perspective view of the workpiece | work which bent the edge part of both sides, and formed the flange part, (b) is the alignment process of a workpiece | work. It is a principal part schematic of the press which shows the state of time. 本発明の実施形態に係る触媒コンバータケースの製造方法の変形例を示す図であり、ワークの切除位置を示す斜視図である。It is a figure which shows the modification of the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, and is a perspective view which shows the cutting position of a workpiece | work. 本発明の実施形態に係る触媒コンバータケースの製造方法の変形例を示す図であり、(a)はフランジ形状に形成した周方向の端部を突き合わせて重ね溶接した状態を示す要部概略図、(b)は突き合わせて形成した周方向の端部を突き合わせ溶接した状態を示す要部概略図、(c)は周方向の端部を重ね溶接した状態を示す要部概略図である。It is a figure which shows the modification of the manufacturing method of the catalytic converter case which concerns on embodiment of this invention, (a) is the principal part schematic diagram which shows the state which faced | matched and welded the edge part of the circumferential direction formed in the flange shape, (B) is the principal part schematic which shows the state which carried out the butt welding of the edge part of the circumferential direction formed by butting, (c) is the principal part schematic diagram which shows the state which carried out the overlap welding of the edge part of the circumferential direction. 本発明の実施形態に係る触媒コンバータケースの変形例を示す図であり、(a)は漏斗部をケース本体部の入口と出口とに配設した一例を示す触媒コンバータケースの正面図、(b)は漏斗部をケース本体部の出口側に配設した一例を示す触媒コンバータケースの拡大断面図である。It is a figure which shows the modification of the catalytic converter case which concerns on embodiment of this invention, (a) is a front view of the catalytic converter case which shows an example which has arrange | positioned the funnel part in the inlet_port | entrance and outlet of a case main-body part, (b) ) Is an enlarged cross-sectional view of a catalytic converter case showing an example in which a funnel portion is disposed on the outlet side of the case main body portion.

符号の説明Explanation of symbols

1 触媒コンバータケース
2 ケース本体部
2a,2b 開口端部
3,31,32 漏斗部
3a,31a,32a 大径部
3b,31b,32b 小径部
3c,3c1,3c2,3d,3d1,3d2 端部
4 触媒本体
5,6 排気管
8 プレス機
9 マニホールド
O 軸芯線
P 排気流路(管路)
S1 絞り工程
S2 切除工程
S3 曲げ工程
S4 合わせ工程
S5 溶接工程
S6 接続工程
W ワーク
W1 湾曲面状部分
DESCRIPTION OF SYMBOLS 1 Catalytic converter case 2 Case main-body part 2a, 2b Open end part 3, 31, 32 Funnel part 3a, 31a, 32a Large diameter part 3b, 31b, 32b Small diameter part 3c, 3c1, 3c2, 3d, 3d1, 3d2 End part 4 Catalyst body 5,6 Exhaust pipe 8 Press machine 9 Manifold O Shaft core P Exhaust flow path (pipe)
S1 Drawing process S2 Cutting process S3 Bending process S4 Matching process S5 Welding process S6 Connecting process W Work W1 Curved surface

Claims (3)

内燃機関の排気ガスの浄化を行う触媒本体を収納する触媒コンバータケースであって、
前記触媒本体が収納される筒状のケース本体部と、
前記ケース本体部に接続される漏斗部と、を備え、
前記漏斗部は、管路が湾曲形状に形成されるとともに、1枚の金属板を筒状に形成し、その周方向の両側の端部が溶接されてなること
を特徴する触媒コンバータケース。
A catalytic converter case that houses a catalyst body for purifying exhaust gas of an internal combustion engine,
A cylindrical case main body for storing the catalyst main body;
A funnel part connected to the case body part,
The catalytic converter case, wherein the funnel portion has a pipe line formed in a curved shape, a single metal plate is formed in a cylindrical shape, and ends on both sides in the circumferential direction are welded.
前記漏斗部は、板金プレス加工により筒状に折り曲げ成形されるとともに、
前記端部は、前記湾曲形状に形成した内周面側に形成されていること
を特徴とする請求項1に記載の触媒コンバータケース。
The funnel part is formed into a tubular shape by sheet metal pressing,
The catalytic converter case according to claim 1, wherein the end portion is formed on an inner peripheral surface side formed in the curved shape.
請求項1または請求項2に記載の触媒コンバータケースの製造方法であって、
前記漏斗部は、
前記金属板からなる1枚のワークに湾曲面状部分を形成する絞り加工する絞り工程と、
前記ワークの余分な部分を切り取る切除工程と、
前記ワークを前記管路方向に向いて略U字状に曲げ加工する曲げ工程と、
前記ワークを筒状に形成して周方向の両側の端部同士を合致させる合わせ工程と、
前記端部を溶接する溶接工程と、を含む工程により製造されること
を特徴とする触媒コンバータケースの製造方法。
A method of manufacturing a catalytic converter case according to claim 1 or claim 2,
The funnel is
A drawing step for drawing to form a curved surface portion on one workpiece made of the metal plate;
An excision step of cutting off an excess part of the workpiece;
A bending step of bending the workpiece toward the pipe line in a substantially U shape;
A matching step of forming the workpiece into a cylindrical shape and matching the ends on both sides in the circumferential direction,
A method of manufacturing a catalytic converter case, comprising: a welding step of welding the end portions.
JP2005196872A 2005-07-05 2005-07-05 Catalytic converter case and manufacturing method thereof Expired - Fee Related JP4624878B2 (en)

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US9644522B2 (en) 2008-03-17 2017-05-09 Faurecia Emission Control Technologies, USA, LLC Cast end cap mounting module
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JP2018040319A (en) * 2016-09-08 2018-03-15 株式会社ユタカ技研 Manufacturing method of case

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