JP3083392B2 - Manufacturing method of metal composite tube - Google Patents
Manufacturing method of metal composite tubeInfo
- Publication number
- JP3083392B2 JP3083392B2 JP04050664A JP5066492A JP3083392B2 JP 3083392 B2 JP3083392 B2 JP 3083392B2 JP 04050664 A JP04050664 A JP 04050664A JP 5066492 A JP5066492 A JP 5066492A JP 3083392 B2 JP3083392 B2 JP 3083392B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- cylindrical
- semi
- metal
- tube
- 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 - Fee Related
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、給水・給湯管、あるい
は冷温水を使用する機器等における配管等として、耐食
性、耐薬品性等を向上させる目的で金属管の少なくとも
内面を合成樹脂によって被覆した、いわゆる金属複合管
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal pipe coated with a synthetic resin for improving corrosion resistance and chemical resistance, for example, as a water supply / hot water supply pipe or a pipe in equipment using cold / hot water. To a method for manufacturing a so-called metal composite pipe.
【０００２】[0002]
【従来の技術】金属管の内面を合成樹脂でライニングし
た金属複合管の製造方法としては種々のものがあるが、
なかでも、帯状金属板をその両側縁部を突き合わせ、あ
るいは重ね合わせるように円筒状に成形し、その突き合
わせ部もしくは重ね合わせ部を溶接等により互いに接合
して金属管を連続的に製管しつつ、その内面に溶融樹脂
を押し出すことによって被覆する方法は、あらかじめ金
属管および樹脂管を製造して、金属管内に樹脂管を挿入
して両者を接着剤で接合する等のバッチ式の製造方法等
に比して、特に製造効率およびスペース効率の点で優れ
ている。2. Description of the Related Art There are various methods for manufacturing a metal composite pipe in which the inner surface of a metal pipe is lined with a synthetic resin.
Above all, the strip-shaped metal plate is formed into a cylindrical shape so that its both side edges are abutted or overlapped, and the abutted or overlapped portions are joined together by welding or the like to continuously produce a metal tube. The method of coating by extruding the molten resin on the inner surface is a batch-type manufacturing method in which a metal tube and a resin tube are manufactured in advance, the resin tube is inserted into the metal tube, and the two are joined with an adhesive. In particular, it is superior in terms of manufacturing efficiency and space efficiency.
【０００３】ところで、このような連続製管および樹脂
の押出被覆による製造方法では、帯状金属板を半円筒状
に予備成形した後に円筒状に成形するが、この円筒状に
成形する方法は、従来、凹曲面を持ち、互いに対向する
成形ロールの一対または複数対を回転させながら、半円
筒状金属板の外周面を押圧する方法が主として採用され
ている。[0003] In such a production method by continuous pipe making and extrusion coating of a resin, a strip-shaped metal plate is preformed into a semi-cylindrical shape and then formed into a cylindrical shape. A method of pressing a peripheral surface of a semi-cylindrical metal plate while rotating a pair or a plurality of pairs of forming rolls having a concave curved surface and facing each other is mainly adopted.
【０００４】このような成形過程において、金属板がロ
ーリングすると、円筒状に成形された状態で突き合わせ
部ないしは重ね合わせ部が一定の方向を向かず、接合が
不可能となる。従って、このようなローリングの発生を
防止するために金属板の両側端面が一定の方向を向くよ
う位置決めする必要がある。In such a forming process, when the metal plate is rolled, the butted portion or the overlapped portion does not face a certain direction in a state of being formed into a cylindrical shape, so that joining is impossible. Therefore, in order to prevent the occurrence of such rolling, it is necessary to position the metal plates so that both end surfaces face in a certain direction.
【０００５】そこで従来、図４に例示するように、半円
筒状金属板１００を円筒状に成形する直前に、一端部に
フランジ状の突起１０１ａ，１０２ａを設けた一対の成
形ロール１０１，１０２に導き、半円筒状金属板１００
の両側端面の位置ずれを防止したり、あるいは、図５に
例示するように、半円筒状金属板を円筒状に成形するた
めの一対の成形ロール２０１，２０２の一方の外周面に
フィン２０１ａを形成して、金属板２００の両側端面の
合わせ目に介在させる等の方法が用いられている。Conventionally, as illustrated in FIG. 4, immediately before forming a semi-cylindrical metal plate 100 into a cylindrical shape, a pair of forming rolls 101, 102 having flange-like projections 101a, 102a provided at one end. Guide, semi-cylindrical metal plate 100
A fin 201a is provided on one outer circumferential surface of a pair of forming rolls 201, 202 for preventing a positional shift of both side end surfaces of the pair of forming rolls or for forming a semi-cylindrical metal plate into a cylindrical shape as illustrated in FIG. For example, a method is used in which the metal sheet 200 is formed and interposed at a joint between both end surfaces of the metal plate 200.
【０００６】[0006]
【発明が解決しようとする課題】ところで、以上のよう
な従来のローリング防止対策では、特に厚さの薄い金属
板や、あるいはアルミニウムや銅等の比較的軟質の金属
板を用いる場合には、金属板の位置ずれが生じようとし
たときに、金属板の一方の側端面が突起１０１ａまたは
１０２ａ、あるいはフィン２０１ａに強く押しつけられ
ることになり、その端面に傷が入ったり、あるいは側縁
部に波うち状の変形が生じて正常な製管を行うことがで
きないという問題があった。By the way, in the above-mentioned conventional rolling prevention measures, particularly when a thin metal plate or a relatively soft metal plate such as aluminum or copper is used, the metal is hardly used. When the plate is to be misaligned, one side end surface of the metal plate is strongly pressed against the projection 101a or 102a or the fin 201a, and the end surface is damaged or the side edge portion has a wave. There was a problem that the pipe was deformed and normal pipe making could not be performed.
【０００７】本発明はこのような点に鑑みてなされたも
ので、特に厚さの薄い金属板や比較的軟質の金属板を用
いても、金属板の側端面や側端部に傷や変形が生じるこ
となく、安定して高精度の製管を行うことができ、もっ
て高効率で高歩留りのもとに金属複合管を製造すること
のできる方法の提供を目的としている。[0007] The present invention has been made in view of such a point, and even if a thin metal plate or a relatively soft metal plate is used, the side end surface or the side end of the metal plate may be damaged or deformed. It is an object of the present invention to provide a method capable of stably producing pipes with high precision without causing the problem, and thereby producing a metal composite pipe with high efficiency and high yield.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の金属複合管の製造方法は、帯状金属板の両
側縁部を相互に突き合わせ、もしくは重ね合わせるよう
円筒状に成形し、その突き合わせ部もしくは重ね合わせ
部を接合して金属管を連続的に製管しつつ、その金属管
の内面に溶融樹脂を押し出すことにより、金属管の少な
くとも内面を樹脂で被覆する複合管の製造方法におい
て、帯状金属板を円筒状に成形するに当たり、この帯状
金属板を半円筒状に予備成形した後、円筒状に成形する
過程で、半円筒状金属板を、円筒形状の内周面を持つ第
１の型と円筒形状の外周面を持つ第２の型の間に導い
て、半円筒状金属板をその外面と、少なくとも両側縁部
近傍の内面を介して上下および左右に位置決めし、ま
た、この第１および第２の型に近接して設けた一対のロ
ーラで半円筒状金属板の各側端面の位置を規制すること
により、半円筒状金属板を周方向に位置決めすることに
よって特徴付けられる。In order to achieve the above object, a method of manufacturing a metal composite tube according to the present invention comprises forming a cylindrical shape such that both side edges of a strip-shaped metal plate abut against each other or overlap each other. A method of manufacturing a composite pipe in which at least the inner surface of a metal tube is coated with a resin by extruding a molten resin onto the inner surface of the metal tube while continuously forming the metal tube by joining the butted or overlapped portions. In forming the metal strip into a cylindrical shape, after preforming the metal strip into a semi-cylindrical shape, in the process of forming into a cylindrical shape, the semi-cylindrical metal plate has a cylindrical inner peripheral surface. Leading between the first mold and the second mold having a cylindrical outer peripheral surface to position the semi-cylindrical metal plate up and down and left and right through the outer surface thereof and at least the inner surface near both side edges; , The first and second By regulating the position of the side end faces of the semi-cylindrical metal plate with a pair of rollers provided in proximity to the mold, characterized by positioning the semi-cylindrical metal plate in the circumferential direction.
【０００９】[0009]
【作用】半円筒状金属板を、その外面と、両側縁部近傍
の内面で上下および左右に位置決めするとともに、両側
端面にローラを当接させて周方向の位置決めを行いつつ
連続製管すると、半円筒状金属板はその両側縁部近傍で
はその表裏および端面でガイドされた状態で進行するこ
とになり、半円筒状金属板がローリングしようとして
も、その力は従来のように端面でのみ制止されるのでは
なく、表裏においても制止されることになり、端面の傷
が生じにくく、また、側縁部の表裏がガイドされている
から側縁部に変形が生じることがない。When a semi-cylindrical metal plate is positioned vertically and horizontally on its outer surface and on the inner surface near both side edges, a roller is brought into contact with both side end surfaces to form a continuous tube while performing circumferential positioning. The semi-cylindrical metal plate will be guided by the front, back, and end surfaces near both side edges, and even if the semi-cylindrical metal plate tries to roll, the force is restricted only at the end surface as in the past. Rather, it is restrained on the front and back sides, so that the end face is unlikely to be damaged, and since the front and back sides of the side edges are guided, no deformation occurs on the side edges.
【００１０】[0010]
【実施例】図１は本発明を適用した金属複合管製造ライ
ンの模式的構成図である。帯状金属板１０はアンコイラ
ー１から表面処理槽（図示せず）を経て引き取り及び予
備成形機２内に引き取られ、ここで半円筒状に予備成形
される。この予備成形の方法は、例えば凸曲面と凹曲面
を持つ一対の成形ロールや、凹曲面を持つ一対の成形ロ
ール等を用いた公知の方法を採用することができる。FIG. 1 is a schematic structural view of a metal composite pipe production line to which the present invention is applied. The strip-shaped metal plate 10 is taken from the uncoiler 1 through a surface treatment tank (not shown) and taken into the preforming machine 2, where it is preformed into a semi-cylindrical shape. As the preforming method, for example, a known method using a pair of forming rolls having a convex curved surface and a concave curved surface, a pair of forming rolls having a concave curved surface, or the like can be adopted.
【００１１】このようにして予備成形された半円筒状金
属板１１は、次いで円管成形機４に導入されるが、この
円管成形機４の手前に、後述するような位置決め装置３
が配置されている。The semi-cylindrical metal plate 11 preformed in this manner is then introduced into a tube forming machine 4. Before the tube forming machine 4, a positioning device 3 described later is provided.
Is arranged.
【００１２】円管成形機４では、半円筒状金属板１１を
その両側縁部同士が突き合わされた状態、もしくは重ね
合わされた状態に成形し、ここで断面真円状の金属筒１
２が得られる。そして、この金属筒１２は次段の溶接機
５によってその両側縁部同士が接合され、金属管１３と
なる。In the tube forming machine 4, the semi-cylindrical metal plate 11 is formed into a state in which both side edges thereof abut each other or in a state where they are overlapped.
2 is obtained. Then, the metal tube 12 is joined at both side edges thereof by the next-stage welding machine 5 to form a metal tube 13.
【００１３】この金属管１３の内部には、円管成形機４
の直前の半円筒状金属板１１の開口部分から樹脂被覆装
置６の一部が挿入されており、この樹脂被覆装置６から
溶融樹脂が金属管１３内に押し出され、これによって金
属管１３の内面が樹脂で被覆された金属複合管１４が得
られる。Inside the metal tube 13, a circular tube forming machine 4 is provided.
A part of the resin coating device 6 is inserted from the opening portion of the semi-cylindrical metal plate 11 immediately before the above, and the molten resin is extruded from the resin coating device 6 into the metal tube 13, whereby the inner surface of the metal tube 13 Is coated with a resin.
【００１４】なお、溶接機５の下流側には、必要に応じ
て管の外面を樹脂で被覆するための外面用樹脂被覆装
置、冷却装置、および巻き取りもしくは切断装置（いず
れも図示せず）が配設される。On the downstream side of the welding machine 5, a resin coating device for the outer surface for coating the outer surface of the pipe with a resin, if necessary, a cooling device, and a winding or cutting device (all not shown) Is arranged.
【００１５】図２は以上の実施例における位置決め装置
３、円管成形機４および樹脂被覆装置６の近傍の具体的
構成を示す側面図であり、図３は位置決め装置３の要部
正面拡大図である。FIG. 2 is a side view showing a specific configuration in the vicinity of the positioning device 3, the circular tube molding machine 4 and the resin coating device 6 in the above embodiment, and FIG. It is.
【００１６】位置決め装置３は、本体部３１と、円筒形
状の内周面を持つ第１の型３２（以下、外側シュー３２
と称する）、円筒形状の外周面を持つ第２の型３３（以
下、内側シュー３３と称する）、および一対の位置決め
ローラ３４１，３４２によって構成されており、外側シ
ュー３２は本体部３１に形成された孔３１ａ内に挿入固
定されるとともに、内側シュー３３は外側シュー３２を
貫通する位置調節兼固定ボルト３３ａによって本体部３
１に固定されている。外側シュー３２の内周面は、予備
成形機２で成形された半円筒状金属板１１の曲率とほぼ
等しい曲率を有し、内側シュー３３の外周面はこの外側
シュー３２の外周面の直径よりも所定寸法小さく、両面
間には略円筒状の空間が形成されるようになっていると
ともに、外側シュー３２と内側シュー３３の長さはほぼ
等しい。また、各位置決めローラ３４１，３４２は一端
部にねじが刻まれた軸３４１ａ，３４２ａの他端に回動
自在に支承されており、この各軸３４１ａ，３４２ａは
本体部３１に形成された長孔内に挿入された状態で、ね
じに蝶ナット３４１ｂ，３４２ｂをねじ込むことによっ
て、本体部３１の孔３１ａの回りを位置調節自在に固定
されている。この各位置決めローラ３４１，３４２は外
側シュー３２，内側シュー３３の下流側に近接して設け
られている。The positioning device 3 includes a main body 31 and a first die 32 (hereinafter referred to as an outer shoe 32) having a cylindrical inner peripheral surface.
), A second mold 33 having a cylindrical outer peripheral surface (hereinafter, referred to as an inner shoe 33), and a pair of positioning rollers 341 and 342. The outer shoe 32 is formed on the main body 31. The inner shoe 33 is inserted and fixed in the hole 31a, and the inner shoe 33 is fixed to the main body 3 by a position adjusting and fixing bolt 33a penetrating the outer shoe 32.
Fixed to 1. The inner peripheral surface of the outer shoe 32 has a curvature substantially equal to the curvature of the semi-cylindrical metal plate 11 formed by the preforming machine 2, and the outer peripheral surface of the inner shoe 33 is smaller than the diameter of the outer peripheral surface of the outer shoe 32. Is also smaller by a predetermined size, a substantially cylindrical space is formed between both surfaces, and the lengths of the outer shoe 32 and the inner shoe 33 are substantially equal. The positioning rollers 341 and 342 are rotatably supported on the other ends of shafts 341a and 342a each having a thread at one end. The shafts 341a and 342a are elongated holes formed in the main body 31. By screwing the wing nuts 341b and 342b into the screws in a state of being inserted into the inside, the position around the hole 31a of the main body 31 is fixed so as to be adjustable. The positioning rollers 341 and 342 are provided near the downstream side of the outer shoe 32 and the inner shoe 33.
【００１７】樹脂被覆装置６は、本体部６１と、この本
体部６１に片持支持された樹脂通流管６２およびサイジ
ングコア６３等によって構成されており、樹脂通流管６
２およびサイジングコア６３が半円筒状金属板１１の開
口部を介して金属筒１２ないしは金属管１３内に挿入さ
れる。そして、樹脂通流管６２の先端部には樹脂吐出口
が形成されており、ここから金属管１３の内面に溶融樹
脂が円筒状に押し出されるとともに、その溶融樹脂はサ
イジングコア６３によって所定の厚さを持つ樹脂層とな
るようにサイジングされる。なお、４３および４４はそ
れぞれ上部押さえローラおよび下部支持ローラである。The resin coating device 6 includes a main body 61, a resin flow pipe 62 and a sizing core 63 supported by the main body 61 in a cantilever manner.
2 and the sizing core 63 are inserted into the metal tube 12 or the metal tube 13 through the opening of the semi-cylindrical metal plate 11. A resin discharge port is formed at the end of the resin flow pipe 62, from which the molten resin is extruded into the inner surface of the metal pipe 13 in a cylindrical shape. It is sized so that it becomes a resin layer having a good thickness. In addition, 43 and 44 are an upper pressing roller and a lower supporting roller, respectively.
【００１８】円管成形機４は、本体部４１と、この本体
部４１に回動自在に支持された一対の成形ロール４２、
４３によって構成されており、成形ロール４２と４３の
間に挿入された半円筒状金属板１１を、その両側縁部が
相互に突き合わされ、あるいは重ね合わされるように円
筒状に成形することができる。The tube forming machine 4 includes a main body 41 and a pair of forming rolls 42 rotatably supported by the main body 41.
The semi-cylindrical metal plate 11 which is constituted by 43 and is inserted between the forming rolls 42 and 43 can be formed into a cylindrical shape such that both side edges thereof abut against each other or overlap each other. .
【００１９】以上の構成において、位置決め装置３の内
側シュー３３と各位置決めローラ３４１，３４２は以下
に示す手順で調整される。まず、内側シュー３３を外側
シュー３２の内周面のほぼ中央部に位置させておき、こ
れらの間に作られた空間内に予備成形された半円筒状金
属板１１の先端を通過させて円管成形機４に導く。この
とき、各位置決めローラ３４１，３４２の蝶ナット３４
１ｂ，３４２ｂを緩めておき、円管成形機４により断面
真円状の金属筒が得られるように、かつ、その突き合わ
せあるいは重ね合わせ部が金属筒の直上にくるよう、各
位置決めローラ３４１，３４２の位置を調整して、半円
筒状金属板１１の端面の位置を定める。In the above arrangement, the inner shoe 33 of the positioning device 3 and the positioning rollers 341 and 342 are adjusted in the following procedure. First, the inner shoe 33 is positioned substantially at the center of the inner peripheral surface of the outer shoe 32, and is passed through the tip of the semi-cylindrical metal plate 11 preformed in a space formed between the inner shoe 33 and the circle. It leads to the tube forming machine 4. At this time, the wing nut 34 of each of the positioning rollers 341 and 342 is used.
1b and 342b are loosened, and the positioning rollers 341 and 342 are positioned so that a metal cylinder having a perfect circular cross section is obtained by the tube forming machine 4 and the butted or overlapped portion is located immediately above the metal cylinder. Is adjusted to determine the position of the end face of the semi-cylindrical metal plate 11.
【００２０】次に、その状態で位置調節兼固定ボルト３
３ａをねじ込んで内側シュー３３を上方に移動させ、図
３に示すように、半円筒状金属板１１の両側縁部近傍の
内面が内側シュー３３に当接する位置で固定する。Next, in this state, the position adjusting and fixing bolt 3
The inner shoe 33 is moved upward by screwing 3a, and is fixed at a position where the inner surfaces near the both side edges of the semi-cylindrical metal plate 11 abut on the inner shoe 33 as shown in FIG.
【００２１】このような調整により、半円筒状金属板１
１はその外面の全域と両側縁部近傍の内面が、外側シュ
ー３２ないしは内側シュー３３に当接した状態で、ま
た、両端面の位置が位置決めローラ３４１，３４２で規
制された状態で位置決め装置３を通過して円管成形機４
に送り込まれる。これにより、半円筒状金属板１１はそ
の全体が上下および左右に位置決めされ、かつ、両端面
の位置が規制された状態で円管状に成形されることにな
り、しかも、半円筒状金属板１１がローリングしようと
しても、その力は単に端面のみならず表裏においても制
止されることになる。また、側縁部は表裏で内外のシュ
ー３２，３３に当接しているから、側縁部に波うち等の
変形が生じない。更に、予備成形時に側縁部にこのよう
な変形が生じた場合でも、位置決め装置３において内側
シュー３３を半円筒状金属板１１の内面に強く押し当て
るように調整することにより、変形を矯正した状態で円
管成形機４に導入することができる。By such adjustment, the semi-cylindrical metal plate 1
1 is a positioning device 3 in a state where the entire outer surface and the inner surface near the both side edges are in contact with the outer shoe 32 or the inner shoe 33, and the positions of both end surfaces are regulated by the positioning rollers 341 and 342. Pipe forming machine 4
Sent to. As a result, the semi-cylindrical metal plate 11 is formed into a circular tube with its entirety positioned vertically and horizontally, and the positions of both end faces are regulated. If he tries to roll, the force will be stopped not only on the end face but also on the front and back. In addition, since the side edges are in contact with the inner and outer shoes 32 and 33 on the front and back, deformation such as waving does not occur on the side edges. Further, even when such deformation occurs at the side edge portion during the preforming, the deformation is corrected by adjusting the positioning device 3 so that the inner shoe 33 is strongly pressed against the inner surface of the semi-cylindrical metal plate 11. It can be introduced into the tube forming machine 4 in a state.
【００２２】以上の本発明実施例により、帯状金属板１
０として板厚０．２５ｍｍ、板幅６０ｍｍのアルミニウ
ム合金板を用いて実際に金属複合管を製造したところ、
端面における傷や側縁部における変形が生じることな
く、金属筒１３の重ね合わせ部の位置が常にその直上を
向いた状態で溶接機５に送られ、良好な金属複合管が得
られることが確かめられた。According to the above embodiment of the present invention, the strip-shaped metal plate 1
When a metal composite tube was actually manufactured using an aluminum alloy plate having a thickness of 0.25 mm and a width of 60 mm as 0,
It is confirmed that the welded portion 5 is sent to the welding machine 5 in a state where the overlapping portion of the metal tube 13 always faces directly upward without any scratches on the end face and no deformation at the side edge portion, and a good metal composite pipe is obtained. Was done.
【００２３】なお、以上の実施例では、位置決めローラ
３４１，３４２を外側シュー３３および内側シュー３４
の下流側に近接して設けたが、上流側に近接して配置し
てもよく、また、内側シュー３４の上下の位置の調節機
構は他の機構を採用することができる。In the above embodiment, the positioning rollers 341 and 342 are connected to the outer shoe 33 and the inner shoe 34.
Although it is provided close to the downstream side of the inner shoe 34, it may be disposed close to the upstream side, and other mechanisms for adjusting the upper and lower positions of the inner shoe 34 can be adopted.
【００２４】更に、位置決め装置３の配設位置は、円管
成形機４の手前に限らず、複数対の成形ロールを用いた
円管成形機にあっては、その円管成形機内の適宜の２組
の成形ロール対の間に配設することができる。Further, the position of the positioning device 3 is not limited to the position before the tube forming machine 4, but in the case of a tube forming machine using a plurality of pairs of forming rolls, an appropriate position in the tube forming machine is required. It can be arranged between two pairs of forming rolls.
【００２５】更にまた、位置決め装置３以外の各製造装
置の方式は、以上の例に限定されることなく、他の公知
の方式を用いた装置を採用し得ることは勿論である。Further, the method of each manufacturing apparatus other than the positioning apparatus 3 is not limited to the above example, and it is a matter of course that an apparatus using another known method can be adopted.
【００２６】[0026]
【発明の効果】以上説明したように、本発明によれば、
予備成形により半円筒状と金属板を、その外面と、少な
くとも両側縁部近傍の内面、および両端面において位置
を規制しつつ、円筒状に成形するから、ローリングの発
生を確実に防止でき、しかも板厚の薄い金属板や比較的
軟質の金属板を用いた場合でも金属板の端面に傷が生じ
たり、あるいは側縁部に変形が生じることがなく、安定
して正確な製管ができ、高効率で高歩留りのもとに金属
複合管を製造することが可能となった。また、金属板の
突き合わせ部ないしは重ね合わせ部の位置決めを、簡単
な調整作業によって行うことができ、作業能率の向上を
はかることができるとともに、予備成形時に金属板の側
縁部に波うち等の変形が生じてもその矯正が可能となっ
た。As described above, according to the present invention,
Since the semi-cylindrical shape and the metal plate are preformed in a cylindrical shape while regulating the position on the outer surface, the inner surface near at least both side edges, and both end surfaces, the occurrence of rolling can be reliably prevented, and Even when a thin metal plate or a relatively soft metal plate is used, the end surface of the metal plate is not scratched, or the side edges are not deformed, and a stable and accurate pipe production can be performed. It has become possible to manufacture metal composite pipes with high efficiency and high yield. In addition, the positioning of the butted portion or the overlapped portion of the metal plate can be performed by a simple adjustment operation, thereby improving work efficiency, and at the time of preforming, the side edge portion of the metal plate has a wavy shape or the like. Even if deformation occurs, its correction is possible.
【図１】本発明を適用した金属複合管の製造ラインの模
式的構成図FIG. 1 is a schematic configuration diagram of a production line of a metal composite pipe to which the present invention is applied.
【図２】図１における位置決め装置３、円管成形機４お
よび樹脂被覆装置６の近傍の具体的構成を示す側面図FIG. 2 is a side view showing a specific configuration in the vicinity of a positioning device 3, a circular tube molding machine 4, and a resin coating device 6 in FIG.
【図３】その位置決め装置６の要部正面拡大図FIG. 3 is an enlarged front view of a main part of the positioning device 6;
【図４】従来のローリング防止対策の一例の説明図FIG. 4 is an explanatory diagram of an example of a conventional anti-rolling measure.
【図５】同じく従来のローリング防止対策の他の例の説
明図FIG. 5 is an explanatory view of another example of the conventional anti-rolling measure.
１０ 帯状金属板 １１ 半円筒状金属板 １２ 金属筒 １３ 金属管 １４ 金属複合管 ２ 引き取りおよび予備成形機 ３ 位置決め装置 ３１ 本体部 ３２ 外側シュー ３３ 内側シュー ３４１，３４２ 位置決めローラ ４ 円管成形機 ５ 溶接機 ６ 樹脂被覆装置 DESCRIPTION OF SYMBOLS 10 Band-shaped metal plate 11 Semi-cylindrical metal plate 12 Metal cylinder 13 Metal tube 14 Metal composite tube 2 Picking-up and preforming machine 3 Positioning device 31 Main part 32 Outer shoe 33 Inner shoe 341 and 342 Positioning roller 4 Circular tube forming machine 5 Welding Machine 6 Resin coating device
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21C 37/08 B21C 37/06 B21D 5/12 B23K 13/00 Continuation of the front page (58) Field surveyed (Int. Cl. 7 , DB name) B21C 37/08 B21C 37/06 B21D 5/12 B23K 13/00
Claims (1)
せ、もしくは重ね合わせるよう円筒状に成形し、その突
き合わせ部もしくは重ね合わせ部を接合して金属管を連
続的に製管しつつ、その金属管の内面に溶融樹脂を押し
出して当該金属管の少なくとも内面を樹脂で被覆する複
合管の製造方法において、上記帯状金属板を円筒状に成
形するに当たり、この帯状金属板を半円筒状に予備成形
した後、円筒状に成形する過程で、半円筒状金属板を、
円筒形状の内周面を持つ第１の型と円筒形状の外周面を
持つ第２の型の間に導いて、当該半円筒状金属板をその
外面と、少なくともその両側縁部近傍の内面を介して上
下および左右に位置決めするとともに、この第１および
第２の型に近接して設けた一対のローラで半円筒状金属
板の各側端面の位置を規制するこにより、当該半円筒状
金属板を周方向に位置決めすることを特徴とする金属複
合管の製造方法。1. A metal tube is formed into a cylindrical shape so that both side edges of a strip-shaped metal plate are butted or overlapped with each other, and the butted or overlapped portions are joined to form a metal tube continuously. In a method for manufacturing a composite pipe in which molten resin is extruded onto the inner surface of a metal tube and at least the inner surface of the metal tube is coated with a resin, the band-shaped metal plate is preliminarily formed into a semi-cylindrical shape when the above-mentioned metal band is formed into a cylindrical shape. After molding, in the process of molding into a cylindrical shape, a semi-cylindrical metal plate,
The semi-cylindrical metal plate is guided between the first mold having a cylindrical inner peripheral surface and the second mold having a cylindrical outer peripheral surface, and the outer surface thereof and at least the inner surfaces near the both side edges thereof are formed. The position of each side end surface of the semi-cylindrical metal plate is regulated by a pair of rollers provided close to the first and second dies, and the position of each half-cylindrical metal plate is adjusted. A method for manufacturing a metal composite pipe, comprising positioning a plate in a circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04050664A JP3083392B2 (en) | 1992-03-09 | 1992-03-09 | Manufacturing method of metal composite tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04050664A JP3083392B2 (en) | 1992-03-09 | 1992-03-09 | Manufacturing method of metal composite tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05245535A JPH05245535A (en) | 1993-09-24 |
| JP3083392B2 true JP3083392B2 (en) | 2000-09-04 |
Family
ID=12865226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04050664A Expired - Fee Related JP3083392B2 (en) | 1992-03-09 | 1992-03-09 | Manufacturing method of metal composite tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3083392B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09201642A (en) * | 1996-01-24 | 1997-08-05 | Meidoo:Kk | Thick collar |
-
1992
- 1992-03-09 JP JP04050664A patent/JP3083392B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05245535A (en) | 1993-09-24 |
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