JP2000179334A - Method and apparatus for manufacturing catalytic- converter container - Google Patents
Method and apparatus for manufacturing catalytic- converter containerInfo
- Publication number
- JP2000179334A JP2000179334A JP10356038A JP35603898A JP2000179334A JP 2000179334 A JP2000179334 A JP 2000179334A JP 10356038 A JP10356038 A JP 10356038A JP 35603898 A JP35603898 A JP 35603898A JP 2000179334 A JP2000179334 A JP 2000179334A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- cone
- material tube
- main body
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、触媒コンバータ容
器の製造方法およびその製造装置に関し、より詳しく
は、基材素管をスピニング加工して本体部とコーン部と
接続部とを有し、さらにコーン部から接続部にかけての
肉厚が本体部から接続部に向かって漸増するように形成
するための触媒コンバータ容器の製造方法およびその製
造装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a catalytic converter container and an apparatus for manufacturing the same, and more particularly, to a method for spinning a base material tube to have a main body, a cone, and a connecting portion. The present invention relates to a method of manufacturing a catalytic converter container for forming a thickness from a cone portion to a connection portion so as to gradually increase from a main body portion to a connection portion, and an apparatus for manufacturing the same.
【０００２】[0002]
【従来の技術】周知のように、自動車のエンジンから排
出された排気ガスを処理するために、触媒コンバータが
用いられている。触媒コンバータの一般的な容器Ｒは、
図３に示すように、触媒担体Ｓを収容する比較的大径の
本体ｒ１と、エキゾーストパイプＥに接続される比較的
小径の接続部ｒ３を有しており、本体ｒ１から接続部ｒ
３に向かって暫時小径となるテーパ状のコーンｒ２とに
より構成されている。このような触媒コンバータ容器Ｒ
は、一般に、本体ｒ１とほぼ同じ径の基材素管をスピニ
ング加工することによって成形されたコーンｒ２を、触
媒担体Ｓが収容された円筒状の本体ｒ１の両端にそれぞ
れ接合して構成されている。2. Description of the Related Art As is well known, a catalytic converter is used to treat exhaust gas emitted from an automobile engine. A typical vessel R for a catalytic converter is:
As shown in FIG. 3, it has a relatively large-diameter main body r1 for accommodating the catalyst carrier S and a relatively small-diameter connection part r3 connected to the exhaust pipe E.
3 and a tapered cone r2 having a smaller diameter for a while. Such a catalytic converter container R
Generally, a cone r2 formed by spinning a base material tube having substantially the same diameter as the main body r1 is joined to both ends of a cylindrical main body r1 in which the catalyst carrier S is accommodated, respectively. I have.
【０００３】ところで、触媒コンバータ容器Ｒのコーン
ｒ２の接続部ｒ３とエキゾーストパイプＥとは、一般に
図４に示すように、ＭＩＧ溶接等により接続される。図
４に示された符号Ｂは、ＭＩＧ溶接によるビードであ
る。このコーンｒ２の接続部ｒ３とエキゾーストパイプ
Ｅとの間の接続部分は、特に、エンジンの始動時におい
て急激に加熱されると共に振動を受ける等、過酷な条件
の下に置かれている。したがって、この接続部分が疲労
することによって脆弱となり穴が開いたり亀裂が生じる
と、排気ガスが漏出して触媒コンバータの浄化処理効率
が悪化する。そのため、コーンｒ２の接続部ｒ３に充分
な強度を付与する必要がある。そこで、図５に示すよう
に、コーンｒ２の接続部ｒ３に補強部材Ｑを設けて肉厚
を増加させて剛性を高めることが従来から行われてい
た。[0003] The connecting portion r3 of the cone r2 of the catalytic converter vessel R and the exhaust pipe E are generally connected by MIG welding or the like as shown in FIG. Reference sign B shown in FIG. 4 is a bead formed by MIG welding. The connecting portion between the connecting portion r3 of the cone r2 and the exhaust pipe E is placed under severe conditions, such as being rapidly heated and vibrated when the engine is started. Therefore, when the connection portion is fatigued and becomes brittle due to fatigue, and a hole or a crack is formed, the exhaust gas leaks and the purification efficiency of the catalytic converter deteriorates. Therefore, it is necessary to give a sufficient strength to the connection portion r3 of the cone r2. Therefore, as shown in FIG. 5, a reinforcing member Q is provided at the connecting portion r3 of the cone r2 to increase the wall thickness and increase the rigidity.
【０００４】一方、特開昭５７−４８３３９号公報に開
示されているように、触媒コンバータのシェルに大径部
を溶接されると共に小径部にパイプおよびフランジを溶
接されるコーンにおいて、該コーンが肉厚一定の基材素
管から加工されて成形されており、而して上記大径部が
基材素管の肉厚より薄くなく、一方小径部が該基材素管
の肉厚より厚く加工成形されていることを特徴とする触
媒コンバータ容器用コーンが知られている。すなわち、
この触媒コンバータ容器用コーンは、図６に示すよう
に、テーパ面（本発明におけるコーン部に相当する）か
ら小径部（接続部）にかけて肉厚が漸増するように形成
されたもので、触媒担体を収容したシェル（本体部）の
両端に突き合わせ溶接される。On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 57-48339, in a cone in which a large diameter portion is welded to a shell of a catalytic converter and a pipe and a flange are welded to a small diameter portion, the cone is The large diameter portion is not thinner than the thickness of the base material tube, while the small diameter portion is thicker than the thickness of the base material tube. 2. Description of the Related Art A cone for a catalytic converter container characterized by being formed by processing is known. That is,
As shown in FIG. 6, the catalytic converter container cone is formed such that its thickness gradually increases from a tapered surface (corresponding to a cone portion in the present invention) to a small diameter portion (connection portion). Is butt-welded to both ends of a shell (main body) that accommodates the.
【０００５】また、この特開昭５７−４８３３９号公報
には、触媒コンバータ容器用コーンの製造方法として、
板厚一定の基材素管をスピニング成形し触媒コンバータ
容器用コーンを製造する方法において、テーパ面を介し
て小径円周部と大径円周部を有する回転成形型に該基材
素管を嵌挿した後該回転成形型と共に回転させると共に
該基材素管外周面に成形ローラを添接し上記テーパ面か
ら小径円周部にかけて押圧転動させスピニング縮管成形
後端部を切断することが開示されている。この製造方法
では、回転成形型と相似のテンプレートに対してスタイ
ラスピンを倣い動作させ、その倣い検知信号を油圧制御
装置に入力してＸ、Ｙ変換出力信号によりクロスフィー
ド装置を制御してスピニングローラを回転成形型に沿っ
て移動させ、回転成形型とスピニングローラとの間で基
材素管を挟圧して、上述したようにテーパ面から小径部
にかけて肉厚が漸増するように形成されたコーンを成形
する。そして、この製造方法で用いられるスピニング縮
管装置では、回転成形型を基材素管に対して前進・退行
させるために、油圧シリンダが設けられている。Japanese Patent Application Laid-Open No. 57-48339 discloses a method for manufacturing a cone for a catalytic converter container.
In a method for manufacturing a cone for a catalytic converter container by spinning a base material tube having a constant thickness, the base material tube is formed into a rotary mold having a small-diameter circumferential portion and a large-diameter circumferential portion via a tapered surface. After the fitting, it is rotated together with the rotary forming die, and a forming roller is attached to the outer peripheral surface of the base material tube and pressed and rolled from the tapered surface to the small-diameter circumferential portion to cut the rear end portion of the spinning contracted tube. It has been disclosed. In this manufacturing method, a stylus spin is copied on a template similar to a rotational molding die, a copy detection signal is input to a hydraulic control device, and a cross feed device is controlled by an X, Y conversion output signal to control a spinning roller. Is moved along the rotary mold, and the base material tube is pressed between the rotary mold and the spinning roller, and the cone is formed such that the wall thickness gradually increases from the tapered surface to the small diameter portion as described above. Is molded. In the spinning tube reducing apparatus used in this manufacturing method, a hydraulic cylinder is provided to move the rotary mold forward and backward with respect to the base tube.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記特
開昭５７−４８３３９号公報に開示された触媒コンバー
タ容器用コーンの製造方法にあっては、基材素管内に回
転成形型が配置されており触媒担体を挿入することがで
きないため、触媒担体を収容したシェルをコーンと連続
して成形した一体型の触媒コンバータ容器を製造するこ
とができないという問題があった。そして、製造された
コーンを後加工で触媒担体を収容したシェルの両端に突
き合わせ溶接しなければならず、工程数が多くなり製造
コストがかかるという問題もあった。さらに、コーンと
シェルとの突き合わせ溶接された接合部は、上述したよ
うに過酷な条件の下では疲労し易く脆弱となる傾向があ
るという問題があった。However, in the method for manufacturing a cone for a catalytic converter container disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-48339, a rotary molding die is arranged in a base material tube. Since the catalyst carrier cannot be inserted, there is a problem that it is not possible to manufacture an integrated catalytic converter container in which a shell accommodating the catalyst carrier is continuously formed with the cone. In addition, the manufactured cone must be butt-welded to both ends of the shell accommodating the catalyst carrier in the post-processing, and there is a problem that the number of steps is increased and the manufacturing cost is increased. In addition, the butt-welded joint between the cone and the shell has a problem that it tends to be fatigued and brittle under severe conditions as described above.
【０００７】また、上記特開昭５７−４８３３９号公報
に開示された製造方法で用いられるスピニング縮管装置
にあっては、回転成形型や回転成形型を基材素管に対し
て前進・退行させるための油圧シリンダ、あるいは回転
成形型に沿ってスピニングローラを倣い移動させるため
のテンプレートやスタイラスピン等を必要とし、その構
造および制御が複雑であるという問題があった。さら
に、このスピニング縮管装置にあっては、回転成形型に
基材素管を嵌挿セットし、成形用スピニングローラを押
圧転動させる様にしてテーパ面から小径部にかけて自動
的に肉厚漸増を企るものであるために、かかる部分を所
望の設定された肉厚で漸増するように形成することが困
難であるという問題もあった。Further, in the spinning tube reducing apparatus used in the manufacturing method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-48339, the rotary mold and the rotary mold are moved forward and backward with respect to the base tube. This requires a hydraulic cylinder or a template or a stylus spin to follow and move the spinning roller along the rotary forming die, and there is a problem that its structure and control are complicated. Furthermore, in this spinning contraction tube device, the base tube is inserted and set in the rotary mold, and the thickness is automatically increased gradually from the tapered surface to the small diameter portion by pressing and rotating the forming spinning roller. Therefore, there is also a problem that it is difficult to form such a portion so as to gradually increase with a desired set thickness.
【０００８】本発明は、上記問題に鑑みてなされたもの
で、コーン部から接続部にかけての肉厚が本体部から接
続部に向かって所望するように確実且つ容易に漸増させ
るよう成形することができ、しかも、接続部に向かって
肉厚が漸増するように形成されたコーン部と触媒担体を
収容した本体部とを連続して成形した一体型の触媒コン
バータ容器を容易に製造することができ、もって製造工
程数を低減して製造コストの引き下げを図ることができ
る触媒コンバータ容器の製造方法を提供することを目的
とする。また、本発明は、簡単な構造で、コーン部から
接続部に向かって所望する肉厚で容易に漸増形成するこ
とができる触媒コンバータ容器の製造装置を提供するこ
とを目的とするSUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to form such that the wall thickness from the cone portion to the connection portion is gradually and reliably increased as desired from the main body portion to the connection portion. In addition, it is possible to easily manufacture an integrated catalytic converter container in which a cone portion formed so as to gradually increase in thickness toward the connection portion and a main body portion containing the catalyst carrier are continuously formed. Accordingly, it is an object of the present invention to provide a method for manufacturing a catalytic converter container that can reduce the number of manufacturing steps and reduce the manufacturing cost. Another object of the present invention is to provide an apparatus for manufacturing a catalytic converter container which has a simple structure and can be easily and gradually formed with a desired thickness from a cone portion to a connection portion.
【０００９】[0009]
【課題を解決するための手段】請求項１の触媒コンバー
タ容器の製造方法に係る発明は、上記課題を解決するた
め、基材素管をスピニング加工することによって、触媒
担体が収容される本体部と、本体部から連続して端部に
向かって暫時小径とされるコーン部と、エキゾーストパ
イプが接続されるコーン部の端部に連続する接続部とを
一体に成形し、さらに、コーン部から接続部にかけての
肉厚を本体部から接続部に向かって漸増させるように形
成する触媒コンバータ容器の製造方法であって、基材素
管を軸回りに回転させながら、基材素管にコーン部と接
続部とを形成するように成形ローラを移動させると共
に、基材素管を軸方向に規制または押圧することを特徴
とするものである。According to a first aspect of the present invention, there is provided a method for manufacturing a catalytic converter container, comprising: a main body for accommodating a catalyst carrier by spinning a base tube; And, from the main body part, a cone part that is temporarily made smaller in diameter toward the end, and a connection part that is continuous to the end of the cone part to which the exhaust pipe is connected are integrally molded, and further, from the cone part A method for manufacturing a catalytic converter container, wherein a thickness of a connecting portion is gradually increased from a main body portion toward a connecting portion, wherein a cone portion is formed on the base material tube while rotating the base material tube around an axis. And a connecting portion, the forming roller is moved, and the base material tube is regulated or pressed in the axial direction.
【００１０】請求項２の触媒コンバータ容器の製造装置
に係る発明は、上記課題を解決するため、基材素管をス
ピニング加工して、触媒担体を収容する本体部と、本体
部から連続して端部に向かって暫時小径となるコーン部
と、エキゾーストパイプを接続するためのコーン部の端
部に連続する接続部とを一体に成形し、さらに、コーン
部から接続部にかけての肉厚が本体部から接続部に向か
って漸増するように形成する触媒コンバータ容器の製造
装置であって、基材素管を把持して軸回りに回転させる
回転駆動手段と、基材素管にコーン部と接続部とを形成
すべく成形ローラを移動させる成形ローラ移動手段と、
基材素管を軸方向に規制または押圧する押圧手段と、を
備えたことを特徴とするものである。According to a second aspect of the present invention, there is provided an apparatus for manufacturing a catalytic converter container, which comprises: a main body for accommodating a catalyst carrier; The cone part that becomes a small diameter for a while toward the end and the connection part that is continuous to the end of the cone part for connecting the exhaust pipe are integrally molded, and the thickness from the cone part to the connection part is the main body Device for manufacturing a catalytic converter container formed so as to gradually increase from a portion to a connection portion, comprising: a rotation drive means for gripping a base tube and rotating it around an axis; and connecting a cone portion to the base tube. Forming roller moving means for moving the forming roller to form a part,
Pressing means for regulating or pressing the base material tube in the axial direction.
【００１１】請求項１の触媒コンバータ容器の製造方法
に係る発明では、触媒担体を収容する本体部とほぼ同じ
径を有する基材素管を軸回りに回転させながら、成形ロ
ーラを繰り返し移動させて基材素管にコーン部および接
続部を連続して一体に成形する。このとき、縮径に伴っ
て軸方向に伸長する傾向にある基材素管を所定の力で軸
方向に規制または押圧する。基材素管のスピニング加工
により縮径された部分は、軸方向に伸長するのに抗して
規制または押圧されることにより、その肉厚が厚くな
る。そして、成形ローラの繰り返し移動による縮径の度
合いに応じて基材素管を所定の力で軸方向に規制または
押圧することにより、基材素管の縮径されたテーパ部か
ら接続部にかけての部分は所望する肉厚に成形されるこ
ととなる。In the invention according to the first aspect of the present invention, the forming roller is repeatedly moved while rotating the base material tube having substantially the same diameter as the main body for housing the catalyst carrier around the axis. The cone part and the connection part are continuously and integrally formed on the base material tube. At this time, the base material tube which tends to expand in the axial direction with the diameter reduction is regulated or pressed in the axial direction by a predetermined force. The portion of the base material tube reduced in diameter by the spinning process is restricted or pressed against elongation in the axial direction, thereby increasing its thickness. Then, by restricting or pressing the base material tube in the axial direction with a predetermined force according to the degree of diameter reduction due to the repeated movement of the forming roller, the diameter of the base material tube from the tapered portion to the connection portion is reduced. The part will be formed to the desired thickness.
【００１２】請求項２の触媒コンバータ容器の製造装置
に係る発明では、触媒担体を収容する本体部とほぼ同じ
径を有する基材素管を回転駆動手段が把持して軸回りに
回転させ、成形ローラ移動手段が成形ローラを繰り返し
移動させてコーン部および接続部を連続して一体に成形
する。このとき、縮径に伴って軸方向に伸長する傾向に
ある基材素管を押圧手段によって所定の力で軸方向に規
制または押圧する。基材素管のスピニング加工により縮
径された部分を、軸方向に伸長するのに抗して規制また
は押圧することにより、その肉厚が厚くなる。そして、
成形ローラの繰り返し移動による縮径の度合いに応じて
基材素管を所定の力で軸方向に規制または押圧すること
により、基材素管の縮径されたテーパ部から接続部にか
けての部分は所望する肉厚に成形される。[0012] In the invention according to the second aspect of the present invention, the rotation driving means grips the base tube having substantially the same diameter as the main body for accommodating the catalyst carrier, rotates the base tube around the axis, and forms the base tube. The roller moving means repeatedly moves the forming roller to continuously and integrally form the cone portion and the connection portion. At this time, the base material tube which tends to expand in the axial direction with the diameter reduction is regulated or pressed in the axial direction by a predetermined force by the pressing means. By regulating or pressing the portion of the base material tube reduced in diameter by the spinning process against expansion in the axial direction, the wall thickness is increased. And
By regulating or pressing the base material tube in the axial direction with a predetermined force according to the degree of diameter reduction due to the repeated movement of the forming roller, the portion from the tapered portion of the base material tube to the connecting portion is reduced. It is formed to a desired thickness.
【００１３】[0013]
【発明の実施の形態】最初に、本発明の触媒コンバータ
容器の製造装置の実施の一形態を、図１および図２に基
づいて詳細に説明する。なお、図において同一符号は同
一部分または相当部分とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of an apparatus for manufacturing a catalytic converter container according to the present invention will be described in detail with reference to FIGS. The same reference numerals in the drawings denote the same or corresponding parts.
【００１４】本発明の触媒コンバータ容器の製造装置
は、概略、基材素管Ｐをスピニング加工して、触媒担体
Ｓを収容する本体部Ｐ１と、本体部Ｐ１から連続して端
部に向かって暫時小径となるコーン部Ｐ２と、エキゾー
ストパイプＥを接続するためのコーン部Ｐ２の端部に連
続する接続部Ｐ３とを一体に成形し、さらに、コーン部
Ｐ２から接続部Ｐ３にかけての肉厚が本体部Ｐ１から接
続部Ｐ３に向かって漸増するように形成する触媒コンバ
ータ容器の製造装置であって、基材素管Ｐを把持してそ
の軸Ｃ−Ｃ回りに回転させる回転駆動手段１と、基材素
管Ｐにコーン部Ｐ２と接続部Ｐ３とを形成すべく成形ロ
ーラ２を移動させる成形ローラ移動手段（後述する）
と、基材素管Ｐを軸Ｃ−Ｃ方向に規制または押圧する押
圧手段３と、を備えている。The apparatus for manufacturing a catalytic converter container according to the present invention generally comprises a main body P1 for accommodating a catalyst carrier S by spinning a base tube P, and continuously extending from the main body P1 toward an end. The cone portion P2 having a temporarily small diameter and the connection portion P3 connected to the end of the cone portion P2 for connecting the exhaust pipe E are integrally formed. Further, the thickness from the cone portion P2 to the connection portion P3 is reduced. A device for manufacturing a catalytic converter container formed so as to gradually increase from a main body portion P1 toward a connection portion P3, and a rotation driving means 1 for gripping a base material tube P and rotating the base material tube P around its axis CC. Forming roller moving means (described later) for moving the forming roller 2 to form a cone portion P2 and a connection portion P3 in the base material pipe P.
And pressing means 3 for regulating or pressing the base material pipe P in the direction of the axis CC.
【００１５】基材素管Ｐは、成形される触媒コンバータ
容器の本体部Ｐ１とほぼ同じ径に設定されたもので、触
媒コンバータ容器に適した材質からなり、スピニング加
工により触媒コンバータ容器を成形することができるも
のであれば、溶接管およびシームレス管のいずれでも用
いることができる。The base material pipe P is set to have substantially the same diameter as the main body portion P1 of the catalytic converter container to be molded, is made of a material suitable for the catalytic converter container, and is formed by spinning to form the catalytic converter container. As long as it can be used, any of a welded pipe and a seamless pipe can be used.
【００１６】回転駆動手段１は、スピンドル１０に設け
られた基材素管Ｐを把持するためのチャック等の把持機
構１１と、スピンドル１０を回転駆動するためのモータ
（図示を省略した）とを備えてなるもので、基材素管Ｐ
を把持してその軸Ｃ−Ｃ回りに回転させる。The rotation driving means 1 includes a gripping mechanism 11 such as a chuck for gripping the base tube P provided on the spindle 10 and a motor (not shown) for driving the spindle 10 to rotate. The base material pipe P
And rotate it around its axis CC.
【００１７】成形ローラ移動手段は、数値制御可能なサ
ーボ機構（図示を省略した）からなるもので、基材素管
Ｐを所望の形状に形成すべく、設定入力されたデータに
基づいて成形ローラ２と基材素管Ｐとを相対的に軸Ｃ−
Ｃ方向および径Ｄ方向に移動させる。なお、この実施の
形態では、図１および２に示すように、軸Ｃ−Ｃ回りに
回転する基材素管Ｐに対して成形ローラ２を移動させる
よう構成されている。The forming roller moving means comprises a servo mechanism (not shown) which can be numerically controlled. The forming roller moving means is formed on the basis of data inputted and set in order to form the base material pipe P into a desired shape. 2 and the base tube P are relatively positioned on the axis C-
It is moved in the direction C and the direction D. In this embodiment, as shown in FIGS. 1 and 2, the forming roller 2 is configured to move with respect to the base material tube P rotating around the axis CC.
【００１８】押圧手段３は、この実施の形態の場合、基
材素管Ｐの端面と相対的に近接・遠退可能に設けられ、
回転駆動手段１のスピンドル１０の回転軸Ｃ−Ｃ線上に
位置して基材素管Ｐの回転と同期回転または従動回転す
るように回転可能に支持された盤状部材３１を備えたも
のである。なお、この実施の形態では、盤状部材３１が
基材素管Ｐの端面に対して軸Ｃ−Ｃ方向に移動するよう
構成されている。そして、この実施の形態では、基材素
管Ｐを軸Ｃ−Ｃ方向に移動させることがないように、回
転駆動手段１の把持機構１１には、基材素管Ｐの盤状部
材３１と対向される端面とは反対側の端面が当接される
底部１１ａが形成されている。また、押圧手段３は、こ
の実施の形態においては、基材素管Ｐの端面に対して盤
状部材３１が軸Ｃ−Ｃ方向に移動するよう構成した場合
によって説明するが、本発明はこれに限定されることな
く、基材素管Ｐを把持した把持機構１１を押圧手段３に
対して軸Ｃ−Ｃ方向に移動させるよう構成することもで
きる。また、押圧手段３は、基材素管Ｐの回転と同期回
転または従動回転するように回転可能に支持されて基材
素管Ｐを軸方向に規制または押圧することができるもの
であれば、盤状部材３１に限定されることなく、回転駆
動手段１の把持機構１１と同様の構成とすることもでき
る。In the case of this embodiment, the pressing means 3 is provided so as to be relatively close to and away from the end face of the base material pipe P,
A disk-shaped member 31 is provided on the rotation axis CC of the spindle 10 of the rotation driving means 1 and rotatably supported so as to rotate synchronously with or follow the rotation of the base tube P. . In this embodiment, the board-shaped member 31 is configured to move in the axis CC direction with respect to the end face of the base material tube P. In this embodiment, the gripping mechanism 11 of the rotation driving means 1 includes the disc-shaped member 31 of the base material tube P so that the base material tube P is not moved in the direction of the axis CC. A bottom portion 11a is formed, with which an end surface opposite to the opposed end surface abuts. Further, in this embodiment, the pressing means 3 will be described according to a case where the disc-shaped member 31 is configured to move in the direction of the axis CC with respect to the end face of the base material pipe P. The configuration is not limited to this, and the gripping mechanism 11 that grips the base material tube P may be configured to move in the direction of the axis CC with respect to the pressing unit 3. The pressing means 3 is rotatably supported so as to rotate synchronously or drivenly with the rotation of the base material tube P, so long as it can regulate or press the base material tube P in the axial direction. The configuration is not limited to the board-like member 31 and may be the same as the configuration of the gripping mechanism 11 of the rotary drive unit 1.
【００１９】次に、本発明の触媒コンバータ容器の製造
方法の実施の一形態を、上述したように構成された製造
装置を用いた場合によって詳細に説明する。なお、図に
おいて同一符号は同一部分または相当部分とする。本発
明の触媒コンバータ容器の製造方法は、概略、基材素管
Ｐをスピニング加工することによって、触媒担体Ｓが収
容される本体部Ｐ１と、本体部Ｐ１から連続して端部に
向かって暫時小径とされるコーン部Ｐ２と、エキゾース
トパイプＥが接続されるコーン部Ｐ２の端部に連続する
接続部Ｐ３とを一体に成形し、さらに、コーン部Ｐ２か
ら接続部Ｐ３にかけての肉厚を本体部Ｐ１から接続部Ｐ
３に向かって漸増させるように形成する触媒コンバータ
容器の製造方法であって、基材素管Ｐを軸回りに回転さ
せながら、基材素管Ｐにコーン部Ｐ２と接続部Ｐ３とを
形成するように成形ローラ２を移動させると共に、基材
素管Ｐを軸方向に規制または押圧することを特徴とする
ものである。Next, an embodiment of the method for manufacturing a catalytic converter container of the present invention will be described in detail by using a manufacturing apparatus configured as described above. The same reference numerals in the drawings denote the same or corresponding parts. The method for manufacturing a catalytic converter container of the present invention is generally a method of spinning a base material tube P to temporarily connect the main body portion P1 in which the catalyst carrier S is accommodated and continuously from the main body portion P1 toward the end. A cone part P2 having a small diameter and a connection part P3 connected to an end of the cone part P2 to which the exhaust pipe E is connected are integrally formed. Further, the thickness from the cone part P2 to the connection part P3 is determined by the main body. From part P1 to connection part P
3. A method of manufacturing a catalytic converter container formed so as to gradually increase toward 3 in which a cone portion P2 and a connection portion P3 are formed in a base material tube P while rotating the base material tube P around an axis. The molding roller 2 is moved as described above, and the base material tube P is regulated or pressed in the axial direction.
【００２０】最初に、回転駆動手段１の把持機構１１に
基材素管Ｐを把持させることができるように、成形ロー
ラ２および盤状部材３１は退避した状態とされている。
そして、回転駆動手段１の把持機構１１に基材素管Ｐを
挿入し、その挿入された端面を把持機構１１の底部１１
ａに当接させた状態で、チャックの締め付け等によって
相対回転不能に把持する。次いで、回転駆動手段１の図
示しないモータを回転させることによって基材素管Ｐを
所定の回転速度で軸回りに回転駆動させながら、基材素
管Ｐにコーン部Ｐ２と接続部Ｐ３を連続して形成するよ
うに、成形ローラ移動手段によって設定入力されたデー
タに基づいて数値制御し、この実施の形態では成形ロー
ラ２を基材素管Ｐに対して移動させて基材素管Ｐを縮径
成形する。この成形ローラ２の移動は、テーパ状に形成
するコーン部Ｐ２の角度および小径に形成される接続部
Ｐ３の径の大きさに応じて、基材素管Ｐの軸に対して傾
斜する方向および平行方向に繰り返し、基材素管Ｐの周
速と対応して所定の送り速度で送られる。なお、基材素
管Ｐを縮径成形する箇所は、図１に示すように、基材素
管Ｐの盤状部材３１側に位置する端部に形成することが
でき、また、図２に示すように、基材素管Ｐのほぼ中央
に、接続部Ｐ３をはさんでコーン部Ｐ２が対称となるよ
うに形成することができる。First, the forming roller 2 and the plate-like member 31 are retracted so that the holding mechanism 11 of the rotary drive means 1 can hold the base material tube P.
Then, the base material tube P is inserted into the gripping mechanism 11 of the rotation driving means 1, and the inserted end face is inserted into the bottom 11 of the gripping mechanism 11.
In the state where it is in contact with a, it is gripped by a chuck or the like so that it cannot rotate relative to each other. Next, the cone section P2 and the connecting portion P3 are continuously connected to the base material tube P while rotating the base material tube P about an axis at a predetermined rotation speed by rotating a motor (not shown) of the rotation driving means 1. Numerical control is performed based on the data set and input by the forming roller moving means. In this embodiment, the forming roller 2 is moved with respect to the base material tube P to reduce the size of the base material tube P. Diameter molding. The movement of the forming roller 2 depends on the angle of the cone portion P2 formed in a tapered shape and the size of the diameter of the connecting portion P3 formed in a small diameter in the direction inclined with respect to the axis of the base material tube P. It is repeated in a parallel direction and fed at a predetermined feed speed corresponding to the peripheral speed of the base material pipe P. In addition, as shown in FIG. 1, a portion where the diameter of the base material tube P is reduced can be formed at an end portion of the base material tube P which is located on the side of the disc-shaped member 31. As shown, the cone part P2 can be formed substantially symmetrically with the connection part P3 interposed therebetween at the substantially center of the base material pipe P.
【００２１】基材素管Ｐは、縮径成形されることに伴っ
て軸方向に伸長する傾向がある。しかしながら、本発明
では、基材素管Ｐを縮径成形する際に、押圧手段３の盤
状部材３１によって、基材素管Ｐが伸張してその端面が
軸方向に移動するのを規制し、または、軸Ｃ−Ｃ方向の
伸長力に抗して基材素管Ｐの端面を押圧する。そのた
め、基材素管Ｐは、本体部Ｐ１の肉厚が維持され、テー
パ状に形成されるコーン部Ｐ２から比較的小径に形成さ
れる接続部Ｐ３にかけての肉厚が、成形ローラ２による
縮径形成と盤状部材３１による規制または押圧との度合
いに応じて、本体部Ｐ１から接続部Ｐ３に向かって漸増
することとなる。The base pipe P tends to expand in the axial direction as the diameter of the base pipe P is reduced. However, in the present invention, when the diameter of the base material tube P is reduced, the board-shaped member 31 of the pressing means 3 restricts the base material tube P from extending and moving its end face in the axial direction. Alternatively, the end face of the base material tube P is pressed against the extension force in the direction of the axis CC. For this reason, the base material pipe P maintains the thickness of the main body part P1, and the thickness from the tapered cone part P2 to the connection part P3 formed with a relatively small diameter is reduced by the forming roller 2. The diameter gradually increases from the main body P1 toward the connection portion P3 according to the degree of the diameter formation and the regulation or pressing by the board-shaped member 31.
【００２２】なお、押圧手段３の盤状部材３１の軸Ｃ−
Ｃ方向の位置は、コーン部Ｐ２から接続部Ｐ３にかけて
形成する肉厚に応じて、スピニング加工開始時から基材
素管Ｐの端面に当接させ、あるいは、スピニング加工に
より基材素管Ｐの端面が軸方向に伸長したときに当接す
るように、スピニング加工開始時には離間させておくこ
とができる。そして、スピニング加工をしているとき
に、基材素管Ｐの端面と当接している盤状部材３１の軸
Ｃ−Ｃ方向の位置を、基材素管Ｐの端面の軸方向の伸長
力に抗して、その位置にとどめて維持するように規制
し、または、盤状部材３１を把持機構１１側に向かって
前進移動させて謂わば積極的に押圧し、あるいは、基材
素管Ｐの端面の伸長による軸方向の移動速度よりも遅い
速度で、盤状部材３１を把持機構１１から離間させるよ
うに後退移動させて謂わば消極的に押圧することもでき
る。The axis C- of the disc-shaped member 31 of the pressing means 3
The position in the C direction is set to abut on the end face of the base material tube P from the start of the spinning process or the spinning process of the base material tube P according to the thickness formed from the cone portion P2 to the connection portion P3. The end faces can be separated at the start of the spinning process so that the end faces abut when extended in the axial direction. When the spinning process is being performed, the position of the board-shaped member 31 in contact with the end surface of the base tube P in the direction of the axis CC is determined by the extension force of the end surface of the base tube P in the axial direction. Or the plate-like member 31 is moved forward toward the gripping mechanism 11 side so as to positively press it, or The disc-shaped member 31 can be moved backward so as to be separated from the gripping mechanism 11 at a speed lower than the moving speed in the axial direction due to the extension of the end face, and so-called passive pressing can be performed.
【００２３】このようにして、コーン部Ｐ２および接続
部Ｐ３は、成形ローラ２による縮径量と、盤状部材３１
による軸Ｃ−Ｃ方向の規制または押圧との度合いによっ
て、その肉厚を所望するように調整することができる。As described above, the cone portion P2 and the connecting portion P3 are formed by the amount of diameter reduction by the forming roller 2 and the disc-shaped member 31.
The thickness can be adjusted as desired by the degree of restriction or pressing in the direction of the axis C-C.
【００２４】その後、回転駆動手段１の図示しないモー
タを回転させた状態で接続部Ｐ３の所望する箇所にカッ
タ（図示は省略する）を当接することにより、接続部Ｐ
３が軸方向において設定された長さとなるように、基材
素管Ｐの端部を縮径成形した場合にあっては図１に破線
で示したように切断し、また、基材素管Ｐのほぼ中央を
縮径成形した場合にあっては図２に破線で示したように
切断する。Thereafter, a cutter (not shown) is brought into contact with a desired portion of the connecting portion P3 while a motor (not shown) of the rotary driving means 1 is rotated, so that the connecting portion P
When the end of the base tube P is reduced in diameter so that 3 has a length set in the axial direction, the base tube P is cut as shown by a broken line in FIG. When the center of P is reduced in diameter, it is cut as indicated by the broken line in FIG.
【００２５】続いて、図１に示したように、基材素管の
一方端を縮径成形した場合にあっては、回転駆動手段に
よる回転を停止させて把持機構から基材素管を一旦取り
出し、コーン部および接続部が形成されていない方の端
部を上述した工程を同様に行って縮径成形することによ
り、所定の形状にコーン部および接続部を形成する。な
お、触媒担体Ｓは、最初に基材素管Ｐの本体部Ｐ１とな
る部分に収容しておき、その後上述した工程を繰り返す
ことにより、触媒担体Ｓが収容された本体部Ｐ１の両端
にコーン部Ｐ２と接続部Ｐ３を縮径成形することができ
る。また、最初に上述した工程により本体部Ｐ１の一方
端にコーン部Ｐ２と接続部Ｐ３を縮径成形した後に、コ
ーン部Ｐ２と接続部Ｐ３が成形されていない他方端から
触媒担体Ｓを挿入し、この他方端にコーン部Ｐ２と接続
部Ｐ３を縮径成形することもできる。Subsequently, as shown in FIG. 1, when one end of the base material tube is reduced in diameter, the rotation by the rotation driving means is stopped, and the base material tube is temporarily stopped by the gripping mechanism. The cone portion and the connection portion are formed in a predetermined shape by taking out and reducing the diameter of the end portion on which the cone portion and the connection portion are not formed by performing the above-described steps in the same manner. The catalyst carrier S is first housed in a portion to be the main body portion P1 of the base material pipe P, and then the above-described steps are repeated to form cones at both ends of the main body portion P1 in which the catalyst carrier S is housed. The diameter of the portion P2 and the connection portion P3 can be reduced. In addition, after the cone part P2 and the connection part P3 are first reduced in diameter at one end of the main body part P1 by the above-described process, the catalyst carrier S is inserted from the other end where the cone part P2 and the connection part P3 are not formed. On the other end, the cone portion P2 and the connection portion P3 can be formed with a reduced diameter.
【００２６】一方、図２に示したように、基材素管Ｐの
ほぼ中央を縮径成形した場合にあっては、最初に触媒担
体Ｓを最初に基材素管Ｐの本体部Ｐ１となる両端近くの
部分にそれぞれ収容しておき、その後、上述した工程を
行うことによって触媒担体Ｓが収容された基材素管Ｐの
ほぼ中央にコーン部Ｐ２と接続部Ｐ３を対称に縮径成形
し、この基材素管の接続部Ｐ３のほぼ中央を切断し、回
転駆動手段１による回転を停止させて把持機構１１から
基材素管Ｐを一旦取り出し、図１に示した場合と同様
に、切断された基材素管Ｐの縮径成形されていない他方
端にそれぞれコーン部Ｐ２と接続部Ｐ３を成形すること
ができる。また、最初に上述した工程を行うことによっ
て基材素管Ｐのほぼ中央にコーン部Ｐ２と接続部Ｐ３を
対称に縮径成形し、この基材素管Ｐの接続部Ｐ３のほぼ
中央を切断し、回転駆動手段１による回転を停止させて
把持機構１１から基材素管Ｐを一旦取り出し、その後、
切断された基材素管Ｐの縮径成形されていない他方端か
ら触媒担体Ｓをそれぞれ挿入し、各基材素管Ｐの他方端
にコーン部Ｐ２と接続部Ｐ３をそれぞれ縮径成形するこ
ともできる。さらには、上述した工程を行い基材素管Ｐ
のほぼ中央のコーン部Ｐ２，Ｐ２の間に位置する接続部
Ｐ３のほぼ中央を切断し、その後、単一の触媒担体Ｓに
対して切断された基材素管Ｐの縮径成形されていない他
方端を互いに挿入し、例えばＴＩＧ溶接等によって切断
された両基材素管Ｐの他方端を互いに接合することもで
きる。この場合にあっては、従来の技術のように本体ｒ
１の両端にコーンｒ２を接合する必要はなく（図３を参
照）、１か所の接合で済むこととなる。On the other hand, as shown in FIG. 2, when the center of the base tube P is reduced in diameter, the catalyst carrier S is first placed on the main body P1 of the base tube P. Then, the cone portion P2 and the connection portion P3 are symmetrically reduced in diameter at substantially the center of the base material tube P in which the catalyst carrier S is accommodated by performing the above-described steps. Then, substantially the center of the connecting portion P3 of the base material tube is cut, the rotation by the rotation driving means 1 is stopped, and the base material tube P is once taken out from the gripping mechanism 11, and the same as in the case shown in FIG. The cone portion P2 and the connection portion P3 can be formed on the other end of the cut base material pipe P, which is not formed in the reduced diameter. First, by performing the above-described steps, the cone portion P2 and the connection portion P3 are symmetrically reduced in diameter at substantially the center of the base material tube P, and the substantially center of the connection portion P3 of the base material tube P is cut. Then, the rotation by the rotation driving means 1 is stopped, and the base material tube P is once taken out from the gripping mechanism 11, and thereafter,
Inserting the catalyst carrier S from the other end of the cut base material tube P that has not been reduced in diameter, and reducing the diameter of the cone portion P2 and the connecting portion P3 at the other end of each base material tube P. Can also. Further, the above process is performed to perform the base material pipe P
Of the connecting portion P3 located between the substantially central cone portions P2 and P2, and thereafter, the diameter of the base tube P cut to the single catalyst carrier S is not reduced. The other ends may be inserted into each other, and the other ends of the base pipes P cut by, for example, TIG welding or the like may be joined to each other. In this case, as in the prior art, the body r
It is not necessary to join the cones r2 to both ends of the unit 1 (see FIG. 3), and only one joint is required.
【００２７】[0027]
【発明の効果】請求項１の発明によれば、基材素管を軸
回りに回転させながら、基材素管が所望の形状となるよ
うに成形ローラを移動させると共に、基材素管を軸方向
に規制または押圧することにより、コーン部の肉厚を接
続部に向かって所望するように確実且つ容易に漸増させ
るよう成形することができ、しかも、接続部に向かって
肉厚が漸増するように形成されたコーン部と触媒担体を
収容した本体部とを連続して成形した一体型の触媒コン
バータ容器を容易に製造することができ、もって製造工
程数を低減して製造コストの引き下げを図ることができ
る触媒コンバータ容器の製造方法を提供することができ
る。According to the first aspect of the present invention, while rotating the base material tube around the axis, the forming roller is moved so that the base material tube has a desired shape, and the base material tube is moved. By restricting or pressing in the axial direction, it is possible to form the cone portion to increase the thickness of the cone portion reliably and easily as desired toward the connection portion, and further, the thickness gradually increases toward the connection portion. The integrated catalytic converter container in which the cone portion formed as described above and the main body portion containing the catalyst carrier are continuously formed can be easily manufactured, thereby reducing the number of manufacturing steps and reducing the manufacturing cost. A method for manufacturing a catalytic converter container that can be achieved can be provided.
【００２８】請求項２の発明によれば、基材素管を把持
して軸回りに回転させる回転駆動手段と、基材素管を所
望の形状に形成すべく成形ローラを移動させる成形ロー
ラ移動手段と、基材素管を軸方向に規制または押圧する
押圧手段と、を備えたことにより、簡単な構造で、コー
ン部から接続部に向かって所望する肉厚で容易に漸増形
成することができる触媒コンバータ容器の製造装置を提
供することができる。According to the second aspect of the present invention, there is provided a rotation driving means for gripping the base material tube and rotating the shaft around the axis, and a forming roller movement for moving the forming roller to form the base material tube into a desired shape. Means, and a pressing means for regulating or pressing the base material tube in the axial direction, with a simple structure, it is possible to easily gradually increase the desired thickness from the cone portion toward the connection portion. It is possible to provide an apparatus for manufacturing a catalytic converter container that can be used.
【図１】本発明の触媒コンバータ容器の製造装置の実施
の一形態を示す説明図である。FIG. 1 is an explanatory view showing one embodiment of a manufacturing apparatus of a catalytic converter container of the present invention.
【図２】本発明の触媒コンバータ容器の製造装置の実施
の別の形態を示す説明図である。FIG. 2 is an explanatory view showing another embodiment of the manufacturing apparatus of the catalytic converter container of the present invention.
【図３】従来の触媒コンバータ容器を示す斜視図であ
る。FIG. 3 is a perspective view showing a conventional catalytic converter container.
【図４】従来の触媒コンバータ容器のコーンにエキゾー
ストパイプを接続した状態を示す断面図である。FIG. 4 is a sectional view showing a state in which an exhaust pipe is connected to a cone of a conventional catalytic converter container.
【図５】エキゾーストパイプとの接続部の剛性を高める
ために補強部材を設けて肉厚を増加させた従来の触媒コ
ンバータ容器を示す断面図である。FIG. 5 is a cross-sectional view showing a conventional catalytic converter vessel in which a reinforcing member is provided to increase the rigidity of a connection portion with an exhaust pipe and the wall thickness is increased.
【図６】小径部に向かって肉厚を漸増する様に形成され
た従来のコーンを示す断面図である。FIG. 6 is a cross-sectional view showing a conventional cone formed so as to gradually increase the thickness toward a small diameter portion.
１ 回転駆動手段 ２ 成形ローラ ３ 押圧手段 Ｐ 基材素管 Ｐ１ 本体部 Ｐ２ コーン部 Ｐ３ 接続部 Ｅ エキゾーストパイプ Ｓ 触媒担体 Ｃ 回転軸線 DESCRIPTION OF SYMBOLS 1 Rotation drive means 2 Forming roller 3 Pressing means P Base material tube P1 Body part P2 Cone part P3 Connection part E Exhaust pipe S Catalyst carrier C Rotation axis
Claims (2)
って、触媒担体が収容される本体部と、本体部から連続
して端部に向かって暫時小径とされるコーン部と、エキ
ゾーストパイプが接続されるコーン部の端部に連続する
接続部とを一体に成形し、さらに、コーン部から接続部
にかけての肉厚を本体部から接続部に向かって漸増させ
るように形成する触媒コンバータ容器の製造方法であっ
て、 基材素管を軸回りに回転させながら、基材素管にコーン
部と接続部とを形成するように成形ローラを移動させる
と共に、基材素管を軸方向に規制または押圧することを
特徴とする触媒コンバータ容器の製造方法。An exhaust pipe is connected to a main body in which a catalyst carrier is accommodated by spinning a base material tube, a cone part continuously reduced in diameter from the main body toward an end, and an exhaust pipe. Manufacturing of a catalytic converter container in which a continuous connecting portion is integrally formed with an end portion of a cone portion to be formed, and further, the thickness from the cone portion to the connecting portion is gradually increased from the main body portion toward the connecting portion. A method comprising: moving a forming roller so as to form a cone portion and a connection portion in the base material tube while rotating the base material tube around an axis; and restricting or controlling the base material tube in the axial direction. A method for manufacturing a catalytic converter container, comprising pressing.
体を収容する本体部と、本体部から連続して端部に向か
って暫時小径となるコーン部と、エキゾーストパイプを
接続するためのコーン部の端部に連続する接続部とを一
体に成形し、さらに、コーン部から接続部にかけての肉
厚が本体部から接続部に向かって漸増するように形成す
る触媒コンバータ容器の製造装置であって、 基材素管を把持して軸回りに回転させる回転駆動手段
と、基材素管にコーン部と接続部とを形成すべく成形ロ
ーラを移動させる成形ローラ移動手段と、基材素管を軸
方向に規制または押圧する押圧手段と、を備えたことを
特徴とする触媒コンバータ容器の製造装置。2. A method for connecting an exhaust pipe to a main body for accommodating a catalyst carrier by spinning a base material tube, a cone part continuously reduced in diameter from the main body toward an end, and an exhaust pipe. A catalytic converter container manufacturing apparatus in which a continuous connecting portion and an end portion of a cone portion are integrally formed, and further, the thickness from the cone portion to the connecting portion is formed so as to gradually increase from the main body portion toward the connecting portion. Rotation driving means for gripping and rotating the base material tube around an axis; forming roller moving means for moving a forming roller to form a cone portion and a connection portion in the base material tube; A device for manufacturing a catalytic converter container, comprising: pressing means for restricting or pressing a tube in an axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35603898A JP3601577B2 (en) | 1998-12-15 | 1998-12-15 | Method and apparatus for manufacturing catalytic converter container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35603898A JP3601577B2 (en) | 1998-12-15 | 1998-12-15 | Method and apparatus for manufacturing catalytic converter container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000179334A true JP2000179334A (en) | 2000-06-27 |
| JP3601577B2 JP3601577B2 (en) | 2004-12-15 |
Family
ID=18447017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35603898A Expired - Fee Related JP3601577B2 (en) | 1998-12-15 | 1998-12-15 | Method and apparatus for manufacturing catalytic converter container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3601577B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1283333A1 (en) * | 2001-08-10 | 2003-02-12 | Leico GmbH & Co. Werkzeugmaschinenbau | Method of manufacturing an exhaust gas catalyst |
| US6732429B2 (en) | 2000-12-05 | 2004-05-11 | Visteon Global Technologies, Inc. | Method for measuring pressure on the substrate of spin formed catalytic converter |
| JP2007500818A (en) * | 2003-05-22 | 2007-01-18 | ブレーン | Regeneration method of catalytic converter |
| JP2009195941A (en) * | 2008-02-21 | 2009-09-03 | Nisshin Steel Co Ltd | Spinning method |
-
1998
- 1998-12-15 JP JP35603898A patent/JP3601577B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732429B2 (en) | 2000-12-05 | 2004-05-11 | Visteon Global Technologies, Inc. | Method for measuring pressure on the substrate of spin formed catalytic converter |
| EP1283333A1 (en) * | 2001-08-10 | 2003-02-12 | Leico GmbH & Co. Werkzeugmaschinenbau | Method of manufacturing an exhaust gas catalyst |
| JP2007500818A (en) * | 2003-05-22 | 2007-01-18 | ブレーン | Regeneration method of catalytic converter |
| JP2009195941A (en) * | 2008-02-21 | 2009-09-03 | Nisshin Steel Co Ltd | Spinning method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3601577B2 (en) | 2004-12-15 |
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