JPH069714B2 - Method for manufacturing bottomed cylindrical body having flat circular cross section - Google Patents
Method for manufacturing bottomed cylindrical body having flat circular cross sectionInfo
- Publication number
- JPH069714B2 JPH069714B2 JP60232851A JP23285185A JPH069714B2 JP H069714 B2 JPH069714 B2 JP H069714B2 JP 60232851 A JP60232851 A JP 60232851A JP 23285185 A JP23285185 A JP 23285185A JP H069714 B2 JPH069714 B2 JP H069714B2
- Authority
- JP
- Japan
- Prior art keywords
- section
- punch
- die
- circular cross
- flat circular
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 産業上の利用分野 この発明は各種容器などとして使用される金属製有底筒
状対を製造する方法に関し、特に横断面が偏平円形、例
えば小判形状あるいは楕円形状などをなす有底筒状体を
製造する方法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 producing a metal bottomed cylindrical pair used as various containers, and particularly to a flat circular cross section such as an oval shape or an elliptical shape. The present invention relates to a method for producing a bottomed cylindrical body.
従来の技術 従来一般の金属製容器の製造方法は、底部と壁部とを一
体に成形する方法と、底部と壁部とを別体に成形して、
接合もしくは接着する方法とに大別される。前者の方法
は深絞り加工、張り出し加工、アイアニング加工の１種
または２種以上を１回以上必要に応じて組合せて施し、
底部と壁部とが一体となった容器を得るものであり、一
方後者の方法は、曲げ加工、ロール加工、ハゼ折り加工
の１種または２種以上と接合・接着加工とを組合せて壁
部を作り、さらに底部と壁部との間の接合、接着加工を
行なうものである。2. Description of the Related Art A conventional method for manufacturing a metal container is a method of integrally molding a bottom and a wall, and a method of molding the bottom and the wall separately.
It is roughly divided into the method of joining or adhering. The former method is one or two or more of deep drawing, overhanging, and ironing, and is applied once or more in combination as necessary.
A container in which a bottom portion and a wall portion are integrated is obtained, while the latter method is a combination of a bending process, a rolling process, a goby folding process, or a combination of bonding and adhering processes. , And the bonding and bonding between the bottom and the wall.
発明が解決すべき問題点 前述のような従来法のうち、底部と壁部とを一体に成形
する前者の方法では、ある程度以上の深さを有する容器
を得るとすれば、１回の加工だけでは困難であり、少な
くとも２回以上の加工を施す必要があり、そのため設備
面その他の面から経済性が劣る欠点がある。またこの方
法によって得られる容器は、断面真円形状のものに限ら
れるのが通常であり、この発明で対象としているような
断面小判型まるいは断面楕円形状の底有筒状体を作成す
ることは未だ技術的に確立されていないのが実情であ
る。Problems to be Solved by the Invention Among the conventional methods as described above, the former method of integrally forming the bottom portion and the wall portion requires only one processing if a container having a depth greater than a certain degree is obtained. It is difficult to do so, and it is necessary to perform the processing at least twice or more. Therefore, there is a drawback that the economical efficiency is poor in terms of equipment and other aspects. In addition, the container obtained by this method is usually limited to one having a perfect circular cross section, and a bottomed tubular body having an oval cross section or an elliptical cross section as intended in the present invention should be prepared. The reality is that is not yet technically established.
一方後者の方法では、深い容器を作成することが比較的
容易であり、また小判型断面や楕円形断面を有する有底
筒状体を作成することも可能であるが、工程数が前者の
方法よりなお一層多く、そのため製造コストが著しく高
くならざるを得ない。On the other hand, in the latter method, it is relatively easy to make a deep container, and it is also possible to make a bottomed cylindrical body having an oval cross section or an elliptical cross section, but the number of steps is the same as the former method. Even more so, the manufacturing costs have to be significantly higher.
この発明は以上の事情を背景としてなされたもので、任
意の深さを有する断面偏平円形状の有底付状体を１回の
成形加工で簡単かつ容易に得ることのできる方法を提供
することを目的とするものである。The present invention has been made in view of the above circumstances, and provides a method capable of easily and easily obtaining a bottomed member having a flat circular cross-section having an arbitrary depth by one molding process. The purpose is.
問題点を解決するための手段 この発明の偏平円形断面を有する有底筒状体の製造方法
は、偏平円形断面を有するポチおよびダイスの間に、ポ
ンチの周長の０．５倍を越え０．８倍以下の幅を有する
実質的に矩形をなす平板状金属板素材を、その金属板素
材の中心と前記ダイス−ポンチの中心線とが一致しかつ
金属板素材の幅方向がダイスの偏平円形断面の長さ方向
と平行となるように配置し、金属板素材に前記ダイスお
よびポンチにより１回の平板絞り加工を行なうことによ
って、全体として偏平円形断面を有する所要深さの有底
筒状をなし、かつその偏平断面の長さ方向の各端部の壁
部のうち、底面から開口端に至るまでの間の中途の位置
から開口端に至るまでの部分が、それぞれ前記金属板素
材の幅方向の同じ側の端面が突合わされた状態で連続的
に接することによって形成された有底筒状体を得ること
を特徴とするものである。Means for Solving the Problems In the method for manufacturing a bottomed cylindrical body having a flat circular cross section according to the present invention, the punch circumferential distance between the punch and the die having the flat circular cross section exceeds 0.5 times the circumferential length of the punch. A substantially rectangular flat plate-shaped metal plate material having a width of 8 times or less is used, and the center of the metal plate material coincides with the center line of the die-punch and the width direction of the metal plate material is flat in the die. Arranged so as to be parallel to the length direction of the circular cross section, and subjecting the metal plate material to flat plate drawing once with the die and punch, thereby forming a bottomed tubular shape having a flat circular cross section with a required depth as a whole. Of the wall portion of each end portion in the length direction of the flat cross section, the portion from the middle position from the bottom surface to the opening end to the opening end, respectively, of the metal plate material A state where the end faces on the same side in the width direction are abutted It is characterized by obtaining a bottomed cylindrical body formed by continuously contacting in a state.
作用 この発明の方法では、全体として偏平円形断面を有する
任意の深さの有底筒状態をダイス・ポンチによる１回の
成形加工で得る。ここで、偏平円形断面の長さ方向（長
軸方向）の各端部の壁部のうち、底面から開口端に至る
までの間の中途の位置から開口端に至るまでの部分は、
それぞれ平板状金属素材の幅方向の同じ側の端面が相互
に突合わされた状態で連続して接することにより形成さ
れる。このように突合わされて連続的に接する部分を以
下突合せ部と記す。なお有底筒状態体の底面から前記中
途の位置（突合せ開始部）までは通常の絞り加工により
得られる連続有底筒状をなしている。Action According to the method of the present invention, a bottomed tubular state having a flat circular cross section as a whole and having an arbitrary depth can be obtained by a single molding process using a die punch. Here, in the wall portion of each end portion in the length direction (long axis direction) of the flat circular cross section, the portion from the middle position from the bottom surface to the opening end to the opening end is
Each of the flat metal materials is formed by continuously contacting end faces on the same side in the width direction in a state where they are abutted against each other. The portion which is abutted and continuously contacts in this way is hereinafter referred to as an abutted portion. The bottomed tubular state body has a continuous bottomed tubular shape obtained by ordinary drawing from the bottom surface to the midway position (butting start portion).
上述のようにダイス・ポンチを用いた成形加工により壁
部（胴部）の一部に突合せ部を有する筒状体に成形して
容器等に使用することは従来は全く考えられていなかっ
た。しかるに本願発明者等の実験・検討によれば、この
ようにして形成された突合せ部は通常は成形と同時に圧
接された状態となり、容器等として充分に実用めきる程
度の液密性を示すことが判明している。すなわち、この
発明により得られた有底筒状体に水を注入しても、突合
せ部から水の漏洩が生じることはなく、さらにその有底
筒状体内の水にある程度の圧力を加えても突合せ部から
漏洩することもないことが確認されている。但し、場合
によっては液密性をより一層向上させたり、さらには気
密性をも付与するため、突合せ部を公知の溶接、ろう付
け等による接合あるいは接着をしても良いことは勿論で
ある。一方この発明の方法によれば、後述するように任
意の深さの有底筒状体を製造でき、したがって長尺な有
底筒状体として建築構造物の梁なおの建築材料あるいは
各種機械装置類の強度メンバーとしても使用できるが、
このような場合は完全な液密性や気密性が要求されない
ことが多く、その場合には突合せ部の接合、接着を行な
わずに成形加工のままで使用することが可能である。As described above, it has never been considered to form a cylindrical body having a butt portion in a part of a wall portion (body portion) by a forming process using a die punch to be used for a container or the like. However, according to the experiments and studies by the inventors of the present application, the butt portion thus formed is usually in a state of being pressure-welded at the same time as molding, and exhibits a liquid-tightness sufficient for practical use as a container or the like. Is known. That is, even if water is injected into the bottomed tubular body obtained by the present invention, water does not leak from the abutting portion, and even if some pressure is applied to the water in the bottomed tubular body. It has been confirmed that there is no leakage from the butt section. However, in some cases, it is needless to say that the abutting portion may be joined or adhered by known welding, brazing or the like in order to further improve the liquid tightness and further to provide the air tightness. On the other hand, according to the method of the present invention, a bottomed cylindrical body having an arbitrary depth can be manufactured as will be described later, and therefore, as a long bottomed cylindrical body, a beam of a building structure or a building material or various mechanical devices. Can also be used as a strength member of a class,
In such a case, complete liquid-tightness and air-tightness are often not required, and in that case, it is possible to use as-molded without joining and adhering the abutting portions.
この発明の方法では、任意の深さを有する断面偏平円形
状の有底筒状体を得ることができる。すなわち、矩形状
の金属板素材についての前述の幅方向い短辺方向）に対
し直角な方向（長辺方向）の長さを長くすれば、それに
伴って突合せ部の長さが長くなるだけで深い有底筒状体
を得ることができる。According to the method of the present invention, it is possible to obtain a bottomed tubular body having a flat circular cross section and having an arbitrary depth. In other words, if the length of the rectangular metal plate material in the direction (long side direction) perpendicular to the above-mentioned width direction and short side direction is increased, the length of the abutting part is increased accordingly. A deep bottomed tubular body can be obtained.
金属板素材の幅は、ポンチの周長の０．５倍を越える幅
とする必要がある。その理由は、金属板素材の幅がポン
チの周長の０．５倍以下えは、前述のような突合せ部が
形成されずにその部分が開いてしまうかあるいはその部
分が突合わされても充分に圧接されないからである。こ
のように継目が充分に圧接されない場合、その部分をさ
らに接合あるいは接着しても充分な液密性、気密性が得
られないとともに、強度的にも劣る。一方金属板素材の
幅がポンチ周長の０．８倍を越えれば深絞り加工時にお
いてポンチの先端面と壁面との境界のＲ部（したがって
有底状体の底面と壁部との境界のＲ部）において金属板
素材が破断するおそれが生じることがあり、また成形品
の深さが浅くなって所要の深さの有底筒状体が得られな
くなることもある。したがって金属板素材の幅はポンチ
の周長の０．５倍を越え０．８倍以下とする必要があ
る。なお前述のような深絞り加工時における金属板素材
のＲ部での破断を確実に防止するためには、金属板素材
の幅は、ポンチの周長の０．５倍を越え０．６倍以下と
することが好ましい。The width of the metal plate material must be more than 0.5 times the circumference of the punch. The reason is that if the width of the metal plate material is 0.5 times or less of the circumference of the punch, the abutting part as described above will not be formed and the part will open or the abutting part will be sufficient. Because it is not pressed against. When the seam is not sufficiently pressure-welded as described above, sufficient liquid-tightness and air-tightness cannot be obtained even if the portions are further joined or adhered, and the strength is poor. On the other hand, if the width of the metal plate material exceeds 0.8 times the circumference of the punch, the R portion of the boundary between the tip surface of the punch and the wall surface (thus, the boundary between the bottom surface of the bottomed body and the wall portion) during deep drawing. There is a possibility that the metal plate material may break at the (R portion), and the depth of the molded product may become shallow, so that a bottomed tubular body having a required depth may not be obtained. Therefore, the width of the metal plate material needs to be more than 0.5 times and not more than 0.8 times the circumference of the punch. In order to reliably prevent breakage of the metal plate material at the R part during deep drawing as described above, the width of the metal plate material should exceed 0.6 times the circumference of the punch. The following is preferable.
発明の実施のための具体的説明 第１図にこの発明の方法を実施するためのポンチ１およ
びダイス２の配置例を示し、また第２図（Ａ）、（Ｂ）
はそれぞれポンチ１の横断面形状の一例を示し、さらに
第３図にはこの発明の方法により得られた有底筒状体４
の一例を示す。Detailed Description for Carrying Out the Invention FIG. 1 shows an example of arrangement of a punch 1 and a die 2 for carrying out the method of the present invention, and FIGS. 2 (A) and 2 (B).
Shows an example of the cross-sectional shape of the punch 1, and FIG. 3 shows a bottomed cylindrical body 4 obtained by the method of the present invention.
An example is shown.
ポンチ１は第２図（Ａ）または第２図（Ｂ）に示すよう
に横断面形状が小判型（長円）あるいは楕円形で代表さ
れる偏平円形となっているものであるが、もちろん小判
型、楕円形に限定されるものではなく、これらに類似す
る形状でも良い。一方ダイス２はポンチ１の横断面形状
に対応するダイス穴２Ａを有するものであって、そのダ
イス穴２Ａの寸法は、ポンチ１に対し成形すべき金属板
素材３の板厚、材質を考慮したクラアランスを保つよう
に設定される。As shown in FIG. 2 (A) or FIG. 2 (B), the punch 1 has an oval shape (oval) or a flat circular shape represented by an ellipse, as a matter of course. The shape is not limited to the elliptical shape, and shapes similar to these may be used. On the other hand, the die 2 has a die hole 2A corresponding to the cross-sectional shape of the punch 1, and the size of the die hole 2A is determined by considering the plate thickness and material of the metal plate material 3 to be formed in the punch 1. Set to maintain Clarence.
実際に成形加工を行なうにあたっては、第１図の鎖線で
示すようにアルミニウム合金等からなる矩形状の金属板
素材３を、その中心Ｏがポンチ１−ダイス２の中心軸線
Ｐに一致しかつ金属板素材３の幅方向に沿った短辺３１
がポンチ１の横断面の偏平円形の長軸Ｑと平行となるよ
うにダイス２上に配置し、ポンチ１を下降させて深絞り
加工を行なう。ここで特に図には示していないが、一般
に深絞り加工において使用するシワ押えやノックアウト
ピン等を用いても良いことは勿論である。When actually performing the forming process, as shown by the chain line in FIG. 1, a rectangular metal plate material 3 made of an aluminum alloy or the like is used, and its center O coincides with the center axis P of the punch 1-die 2 and Short side 31 along the width direction of the plate material 3
Is arranged on the die 2 so as to be parallel to the long axis Q of the flat circular cross section of the punch 1, and the punch 1 is lowered to perform deep drawing. Although not particularly shown in the drawing, it is of course possible to use a wrinkle retainer, a knockout pin or the like generally used in deep drawing.
なおここで金属板素材３として幅方向に沿った短辺３１
の長さＬ１がポンチ１の周長の０．５倍を越え０．８倍
以下のもの、好ましくは０．５倍を越え０．６倍以下の
ものを用いる。また金属板素材３の長辺３２の長さＬ２
は、作成すべき有底筒状体の深さに応じて適宜決定すれ
ば良い。すなわち長辺３２の長さは、得るべき筒状体の
深さの２倍と、ポンチ１の横断面の短軸方向の長さと、
トリミング等の余裕部分の長さとの和となるように定め
ておけば良い。Here, the short side 31 along the width direction as the metal plate material 3
The length L 1 of the punch 1 is more than 0.5 times and not more than 0.8 times the circumference of the punch 1, preferably more than 0.5 times and not more than 0.6 times. In addition, the length L 2 of the long side 32 of the metal plate material 3
May be appropriately determined according to the depth of the bottomed tubular body to be created. That is, the length of the long side 32 is twice the depth of the tubular body to be obtained, and the length of the cross section of the punch 1 in the short axis direction,
It should be set so that it will be the sum of the length of the margin such as trimming.
上述のような絞り加工によって得られた成形品は、第３
図に示すように偏平円形断面を有する所要深さの有底筒
状体４をなしており、しかもその有底筒状体４は、その
偏平円形断面の長さ方向（長軸方向）の両端部の壁部４
１に、底面４２から開口部４３に至るまでの間のうち、
中途の位置４４から開口部４３まで連続する突合せ部４
５が形成されている。なおこの突合せ部４５は既に述べ
たように圧接されているのが通常である。The molded product obtained by drawing as described above is
As shown in the figure, a bottomed tubular body 4 having a flat circular cross section and having a required depth is formed. Moreover, the bottomed tubular body 4 has both ends in the longitudinal direction (long axis direction) of the flat circular cross section. Wall part 4
1, from the bottom surface 42 to the opening 43,
Butt 4 that continues from the midway position 44 to the opening 43
5 is formed. Incidentally, the abutting portion 45 is normally press-contacted as described above.
このようにして得られた有底筒状態４はそのまま容器や
強度メンバー等として製品化しても良く、また場合によ
っては前記突合せ部４５をさらに溶接、ろう付けなどに
より接合したりあるいは接着剤コーティングなどにより
接着して、液密性をより一層向上させたり、気密性を付
与したりしても良い。The bottomed cylindrical state 4 thus obtained may be commercialized as it is as a container, a strength member, or the like. In some cases, the abutting portion 45 may be further joined by welding, brazing, or adhesive coating. To further improve the liquid-tightness or impart airtightness.
実施例 板厚０．８mmの軟質アルミニウム板について、第２図
（Ａ）に示すような小判型の横断面形状を有する２種の
寸法のポンチ−ダイス工具Ａ、Ｂを用いて12トン深絞り
試験機により深絞り加工を行なった。用いた２種の工具
Ａ、Ｂの寸法は、第１表に示す通りである。なお第１表
においてｒ、ｗ、ｌｐは第２図（Ａ）中に示す通りであ
り、またｒｐはポンチ肩半径、ｒｄはダイス肩半径、ｃ
はダイス−ポンチ間のクラアランスである。Example A soft aluminum plate having a plate thickness of 0.8 mm was deep-drawn with a depth of 12 tons by using punch die tools A and B having two sizes having an oval cross-sectional shape as shown in FIG. 2 (A). Deep drawing was performed using a test machine. The dimensions of the two kinds of tools A and B used are as shown in Table 1. In Table 1, r, w and l p are as shown in FIG. 2 (A), r p is the punch shoulder radius, r d is the die shoulder radius, c
Is the clearance between die and punch.
素材形状は矩形とし、圧延方向の長さをＬ１、圧延方向
に対し直角な方向の長さをＬ２として、Ｌ１の方向をポ
ンチ４の横断面の長軸方向と平行とした。そしてＬ１の
値（短辺の幅）は、工具Ａの場合は８０mm、工具Ｂの場
合は７０mmとした。したがって工具Ａの場合は素材の幅
Ｌ１はポンチ周長の約０．５５倍、工具Ｂの場合は素材
の幅Ｌ１はポンチの周長の約０．５３倍である。ま潤滑
剤としては市販の鉱物性プレス油を素材全面に塗布し、
またしわ押えを用いてそのしわ押え力は200kgとした。 The material shape was rectangular, the length in the rolling direction was L 1 , the length in the direction perpendicular to the rolling direction was L 2 , and the direction of L 1 was parallel to the long axis direction of the cross section of the punch 4. The value of L 1 (width of the short side) was 80 mm for tool A and 70 mm for tool B. Therefore, in the case of the tool A, the width L 1 of the blank is about 0.55 times the circumference of the punch, and in the case of the tool B, the width L 1 of the blank is about 0.53 times the circumference of the punch. As a lubricant, apply commercially available mineral press oil to the entire surface of the material,
The wrinkle retainer was used and the wrinkle retainer force was 200 kg.
以上の条件下で、工具Ａを用いた場合は素材の長辺長さ
Ｌ２を100〜300mmの範囲内で種々変化させ、また工具Ｂ
を用いた場合は素材の長辺長さＬ２を70〜200mmの範囲
内で種々変化させて絞り加工を行なったところ、素材の
破断が生じることなく、種々の深さを有する第３図に示
すような横断面小判型の有底筒状体を得ることができ
た。そしていずれも突合せ部は良好に圧接されているこ
とが判明した。Under the above conditions, when the tool A is used, the long side length L 2 of the material is variously changed within the range of 100 to 300 mm, and the tool B is used.
When the material was used, the long side length L 2 of the material was variously changed within the range of 70 to 200 mm, and the drawing was performed. It was possible to obtain a bottomed cylindrical body having an oval cross section as shown. It was found that the abutting portion was pressed well in both cases.
発明の効果 前述の説明で明らかなようにこの発明の方法によれば、
任意の深さを有する横断面偏平円形状の有底筒状体を１
回の成形加工で簡単かつ容易に得るとができ、したがっ
てこの種の形状の有底筒状体の製造コストを従来よりも
格段に低減することができる顕著な効果が得られる。As is apparent from the above description, according to the method of the present invention,
1 with a bottomed cylindrical body having a flat cross section with an arbitrary depth
It can be easily and easily obtained by performing the molding process once, and therefore, the remarkable effect that the manufacturing cost of the bottomed cylindrical body of this kind of shape can be markedly reduced as compared with the conventional case is obtained.
第１図はこの発明の方法で使用するダイス−ポンチの一
例を示す略解的な斜視図、第２図（Ａ）、（Ｂ）はそれ
ぞれこの発明の方法で使用するポンチの横断面形状の一
例を示す模式図、第３図はこの発明の方法により得られ
た有底筒状体の一例を示す斜視図である。 １…ポンチ、 ２…ダイス、 ３…金属板素材、 ４…有底筒状体、 ４５…突合せ部。FIG. 1 is a schematic perspective view showing an example of a die-punch used in the method of the present invention, and FIGS. 2 (A) and 2 (B) are examples of cross-sectional shapes of punches used in the method of the present invention. FIG. 3 is a perspective view showing an example of a bottomed tubular body obtained by the method of the present invention. 1 ... Punch, 2 ... Die, 3 ... Metal plate material, 4 ... Bottomed cylindrical body, 45 ... Butt part.
Claims (1)
の間に、ポンチの周長の０．５倍を越え０．８倍以下の
幅を有する実質的に矩形をなす平板状金属板素材を、そ
の金属板素材の中心と前記ダイス−ポンチの中心線とが
一致しかつ金属板素材の幅方向がダイスの偏平円形断面
の長さ方向と平行となるように配置し、金属板素板に前
記ダイスおよびポンチにより１回の平板絞り加工を行な
うことによって、全体として偏平円形断面を有する所要
深さの有底筒状をなし、かつその偏平断面の長さ方向の
各端部の壁部のうち、底面から開口端に至るまでの間の
中途の位置から開口端に至るまでの部分が、それぞれ前
記金属素材の幅方向の同じ側の端面が突合わされた状態
で連続的に接することによって形成された有底筒状体を
得ることを特徴とする、偏平円形断面を有する有底筒状
体の製造方法。1. A substantially rectangular flat metal plate material having a width of more than 0.5 times and less than 0.8 times the circumference of the punch between the punch and the die having a flat circular cross section. The center of the metal plate material and the center line of the die-punch are aligned and arranged so that the width direction of the metal plate material is parallel to the length direction of the flat circular cross section of the die, By performing flat plate drawing once with a die and punch, a bottomed tubular shape having a flat circular cross section as a whole and having a required depth is formed, and among the wall portions at the end portions in the longitudinal direction of the flat cross section. , A portion from a position midway between the bottom surface and the opening end to the opening end is formed by continuously contacting the end faces of the metal material on the same side in the width direction in abutting relation with each other. Characterized by obtaining a bottomed tubular body That method of the bottomed cylindrical body having a flat circular section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60232851A JPH069714B2 (en) | 1985-10-18 | 1985-10-18 | Method for manufacturing bottomed cylindrical body having flat circular cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60232851A JPH069714B2 (en) | 1985-10-18 | 1985-10-18 | Method for manufacturing bottomed cylindrical body having flat circular cross section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6293031A JPS6293031A (en) | 1987-04-28 |
| JPH069714B2 true JPH069714B2 (en) | 1994-02-09 |
Family
ID=16945803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60232851A Expired - Lifetime JPH069714B2 (en) | 1985-10-18 | 1985-10-18 | Method for manufacturing bottomed cylindrical body having flat circular cross section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069714B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674832U (en) * | 1993-03-16 | 1994-10-21 | 石松 窪田 | Processing method of guide cylinder in refueling tank |
-
1985
- 1985-10-18 JP JP60232851A patent/JPH069714B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6293031A (en) | 1987-04-28 |
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