JPS5861918A - Method and apparatus for manufacturing stainless steel pipe having large diameter - Google Patents

Abstract

PURPOSE:To manufacture a stainless steel pipe having large diameter easily by forming a stainless steel plate into a body having polygonal profile by die bending, welding the end part and, after annealing, correcting roundness and straightness by upper and lower dies having semicircular profile. CONSTITUTION:A stainless steel plate 1 is placed on a gate stand 3 consisting of 3A, 3B and made to nearly hexagonal form by die bending using a punch 6, and then formed to pentagonal from by adjusting pressing force from the directions A, B and pressing force from the directions of C, D caused by rolls 10, 11. After welding butted parts 9 of the upper side 1C by a welding torch 19, unnecessary parts such as burrs at the weld zone is cut off and ground. Further, after checking the quality of welding, the stainless steel plate is tempered by annealing. Then, it is pickled, neutralized, washed with water and dried. Finally, the shape is corrected for roundness and straightness by an upper die 21 and a lower die 20 having semicircular inner face to obtain a large diameter stainless steel pipe.

Description

【発明の詳細な説明】 本発明は、大直径（以下、大径と呼ぶ。）ステンレ、［
管を、ステンレス鋼板よりダイ曲げと溶接ｊこよって製
造する方法および装置に関する。このような管は、通常
厚さが２ミリメートル以上から約２５ミリメートルの鋼
板から製造される。Detailed Description of the Invention The present invention provides large diameter (hereinafter referred to as large diameter) stainless steel, [
This invention relates to a method and apparatus for manufacturing pipes from stainless steel plates by die bending and welding. Such tubes are usually manufactured from sheet steel with a thickness of 2 mm or more to about 25 mm.

ステンレス大径管は、最近までは需要量が少なく、必要
な都度に、ステンレス鋼板をほぼ円形に折り曲げて合せ
た縁端面を突き合せ溶接して製造した。しかし需要量が
増大するにつれて、所定長の標準管を汎用性をもたせた
形状寸法で提供し、コストを低下し、一定の品質保証を
し、量産をし且つ多形状多用途に製造の切換可能なもの
の提供が求められてきた。しかしながら、これらの要請
に応するためには、よく・管理された工程と確立され−
ｆｃ製造過程の作業標準化と自動作業化とが必要である
。そのためには、最も合理的なステンレス鋼板の作成と
供給、最適の予備成形、成形体の溶接、溶接管の真円度
矯正、管の熱処理、管の酸洗、〈〕これらの過程ごとの
作業および過程内品質の管、また製造の過程または装置
の連続自動化の作業作動が適正であってバランスよく良
好に実施できることが重要かつ必要である。Until recently, demand for large-diameter stainless steel pipes was low, and each time they were needed, they were manufactured by bending stainless steel plates into a nearly circular shape and butt welding the edges together. However, as demand increases, standard pipes of predetermined lengths can be provided in versatile shapes and sizes, reducing costs, ensuring a certain level of quality, mass production, and making it possible to switch manufacturing to a variety of shapes and uses. There has been a demand for something to be provided. However, in order to meet these demands, well-controlled processes and well-established
It is necessary to standardize and automate the fc manufacturing process. To achieve this, we need to create and supply the most rational stainless steel sheet, optimal preforming, welding of formed bodies, straightening of welded tubes, heat treatment of tubes, pickling of tubes, and operations for each of these processes. It is important and necessary that the working operation of continuous automation of manufacturing processes or equipment to be properly and well-balanced and well-performed.

本発明は前記現状にかんがみ、原ステンレス鋼板供給、
折曲げ成形、溶接、焼鈍、酸洗・水洗・乾燥、真円と真
直の矯正および各過程間の搬送など、溶接大径管の汎用
的工程条件を明確にし、適正な製造の方式を確立し、効
率、作業性、コストおよび品質において、きわめて顕著
に良好な溶接管製造の方法および装置を提供することを
目的とする。In view of the above-mentioned current situation, the present invention provides raw stainless steel sheet supply,
We have clarified general process conditions for welded large-diameter pipes, such as bending, welding, annealing, pickling, washing, drying, correcting circularity and straightness, and transportation between each process, and established an appropriate manufacturing method. It is an object of the present invention to provide a method and apparatus for manufacturing welded pipes that are significantly improved in terms of efficiency, workability, cost, and quality.

次に、本発明について、その概！！を説明する。Next, an overview of the present invention! ! Explain.

第１Ａ図にフローシートの一例示図を、第１Ｂ図、第１
Ｃ図およ−び第１Ｄ図に成形・溶接などの一実施例の正
面図を示す。一定長の管製造に適応するバッチ方式、連
続鋼帯からのエンドレス状の管製造に要する連続方式ま
たはこれらの組合せｋどの場合について、本発明は、本
質的に共通の技術ｌこよって、同一に考えたもので達成
し得るようにした。先ず所定の形状寸法のステンレス鋼
の板・帯（以下鋼板と呼ぶ）を準備する。次に、該鋼板
を所定の形、状寸法にして、折り曲げて互角形番こする
ためＥこ、その加工用のあおりダイ上に配装する。Figure 1A shows an example of the flow sheet, Figure 1B,
FIG. C and FIG. 1D show front views of an example of forming, welding, etc. Whether it is a batch method adapted to the manufacture of fixed length tubes, a continuous method required for the manufacture of endless tubes from a continuous steel strip, or a combination thereof, the present invention utilizes essentially common techniques and is therefore identical. I made it possible to achieve what I thought. First, a stainless steel plate/strip (hereinafter referred to as a steel plate) having a predetermined shape and size is prepared. Next, the steel plate is formed into a predetermined shape and size, bent and placed on a tilting die for processing.

このあおりダイは、左右対称に設けた２枚の定盤から成
り、これら定盤の間ｌこ所定の間隔を保ち成形時の下部
支持と送り出し受入れとに用いるロール群を備え、各あ
おり台の前記の中間に備えたあおりダイ間ロール寄りの
各一端ｌこ縦方向に貫通する支持軸を支点にして該軸の
周に自在に回転し得るようにし、他のあおり台の外側の
端に備えた縦方向に貫通する支持軸を該軸番こ装着した
シリンダー機構をもって押し上げて、両あおりダイを左
右対称に傾斜をつけるようにする（第３Ｃ図の３Ａと３
Ｂがあおりダイ、５Ａと５Ｂが支点軸、４Ａと４Ｂがシ
リンダー機構装着軸の例示）。This tilting die consists of two surface plates installed symmetrically, and a set of rolls are kept between these surfaces at a predetermined distance and used for supporting the lower part during molding and receiving the feed. One end of each end near the roll between the tilting dies provided in the middle of the above is configured to be able to freely rotate around a support shaft penetrating in the vertical direction as a fulcrum, and is provided at the outer end of the other tilting stand. Push up the support shaft penetrating in the vertical direction using the cylinder mechanism attached to the shaft number, so that both gate dies are tilted symmetrically (see 3A and 3 in Figure 3C).
B is the opening die, 5A and 5B are the fulcrum shafts, and 4A and 4B are the cylinder mechanism mounting shafts).

前記のあおりダイと対をなし、あおりダイの面と下部中
間に備えたロールと上部からの抑圧プレスする成形ポン
チを当接して、第一、第二、第三、第四および第五の折
り曲げをしゅるやがな曲げ勾Ｏ配をつけた五角形に成形
する成形部を設ける。こうして第５図に示したような所
定形状寸法の五角形のステンレス鋼板の折り曲げ成形を
し、上面中央透面の中央に鋼板の端縁の溶接部があるよ
うｌこする。第５図の一例示のものでは、高さ寸法ｈ１
と幅寸法ｈ！の寸法比ｈｘ／ｈ＠が、１．０から１．５
の範囲に入るのを標準にし、成形は、辺のなす角度を、
θ２、θ３、θ、が約９０度の範囲に入り、上部辺に溶
接部９があるようにし該表面は水平平面にあることを標
準とする。第１Ｂ図は前記の五角形がスプリングバック
しているのを、矢印Ａ方向とＢ方向から押して、第１Ｏ
図に示すようにロール１１とｌＯの間にセットし矢印０
とＤ方向から形体を維持するよう矢印ＡとＢ方向からの
押しと調和させて維持し適正な五角形にし、上部辺１０
の突合せ部９を、溶接トーチ１９を矢印０方向に進め、
溶接用突合せ部９に近接させ、適正に維持し、突合せ管
を移動させながら、下向き溶接を行う。The first, second, third, fourth, and fifth bends are made by contacting the roll provided between the surface of the tilting die and the lower part of the tilting die, and the forming punch for pressing from above. A forming section is provided to form the pentagon into a pentagon with a bending slope O. In this way, a pentagonal stainless steel plate having a predetermined shape and dimensions as shown in FIG. 5 is bent and formed, and rubbed so that the welded portion of the edge of the steel plate is located in the center of the upper center transparent surface. In the example shown in FIG. 5, the height dimension h1
and width dimension h! The dimension ratio hx/h@ is 1.0 to 1.5
The standard is to fall within the range of , and the angle formed by the sides is
It is standard that θ2, θ3, and θ fall within a range of approximately 90 degrees, the welded portion 9 is located on the upper side, and the surface is in a horizontal plane. Figure 1B shows the pentagon springing back when pushed from the directions of arrows A and B.
Set between roll 11 and lO as shown in the figure and arrow 0
To maintain the shape from the direction of arrows A and D, maintain it in harmony with the push from the directions of arrows A and B to make it a proper pentagon.
advance the welding torch 19 in the direction of arrow 0,
Welding is performed in a downward direction while moving the butt pipe while keeping it close to the butt part 9 for welding and properly maintaining it.

溶接後に、溶接部のパリなど不要部分を削り落し研磨し
、次に溶接の良否をチェックし、次に上型２１と下型２
０（第１Ｄ図）とを用贋て各型の半円形の内面２を、前
記の五角形の溶接体に当接させて、型の合せ面２０人と
２ＬＡ、２０Ｂと２１Ｂとを接合して真円度ｌこ成形補
正（以下、０矯正と呼ぶ。）をする。こうして真円溶接
鋼管Ｏｆ（第１Ｄ図）を形成し、次に熱処理により調質
し　次に酸洗、中和、水況、乾燥をし、所定の要素ケチ
ニックし、製品を得る。After welding, unnecessary parts such as the welding part are scraped off and polished, the quality of the welding is checked, and then the upper die 21 and the lower die 2 are removed.
0 (Fig. 1D), the semicircular inner surface 2 of each mold was brought into contact with the pentagonal welding body, and the mating surfaces of the molds 20, 2LA, 20B, and 21B were joined. Perform roundness correction (hereinafter referred to as zero correction). In this way, a perfect circular welded steel pipe Of (Fig. 1D) is formed, which is then tempered by heat treatment, followed by pickling, neutralization, water conditioning, drying, and predetermined elemental nicking to obtain a product.

本発明の製造品は、大径管であるが、ターゲットとして
は、一応、ステンレス鋼板厚さが２〜２５朋、内径が７
５〜４０００程度の範囲で、共通汎用の製造の方法と装
置を設けて、高度の作業容易性、効率および低コストで
高品質で保証性のきわめて高い製品を↓遺し提供するも
のとして検討する。The manufactured product of the present invention is a large diameter pipe, but the target is a stainless steel plate with a thickness of 2 to 25 mm and an inner diameter of 7 mm.
In the range of 5 to 4,000 units, we will provide common and general-purpose manufacturing methods and equipment to provide products with high workability, efficiency, low cost, high quality, and extremely high guarantees.

こうであるが、そのうち需要の最も多い範ｉのもの、鋼
板厚さが３〜１６ｓｕ＋、内径が１００〜３３０ＷＬｘ
１鋼板の材質が日本標準規格８ＵＳ　３０４　（ａ＜ｏ
、ｏｓ、　Ｎｉ８〜１０．５．０ｒ１８．０〜２０．０
各重量含有量チ）について説明する。他の成分組成のス
テンレス鋼であっても、また形状寸法が多少の変化がさ
れた場合も、同様な技術思想でもって適用できる。しか
し多少の差異がある。例えば、溶接突合せ部では、厚板
では第４Ａ図に示すように開先き部、角度０１會付し、
中板以下では第４Ｂ図に示すように開先全村さないでも
よいが、板厚１６１１Ｊｌの場合ｔ　１／ｌ　ｚが２〜
３で、θ１が７０度標準が適する。板厚５ｕでは開先が
なくてもよい。Of these, the most in-demand range is steel plate thickness of 3 to 16su+ and inner diameter of 100 to 330WLx.
1 The material of the steel plate is Japanese standard 8US 304 (a<o
, os, Ni8~10.5.0r18.0~20.0
Each weight content (1) will be explained. The same technical idea can be applied to stainless steels with other compositions or with slight changes in shape and dimensions. However, there are some differences. For example, in a welded butt part, a thick plate has a beveled part and an angle of 01 as shown in Fig. 4A,
As shown in Figure 4B, for intermediate plates and below, it is not necessary to cut the entire groove, but in the case of a plate thickness of 1611 Jl, t1/lz is 2 to 2.
3, and θ1 of 70 degrees is suitable as a standard. If the plate thickness is 5u, there may be no groove.

所定形状の五角形成形体を、内成形し、０矯正をし、真
円度を有するよう補正加工をし、さらｌこ後処理をする
。次に、本発明について一実施例を示し図面に基づいて
説明する。A pentagonal shaped body of a predetermined shape is internally molded, zero-corrected, corrected to have roundness, and subjected to post-processing. Next, one embodiment of the present invention will be described based on the drawings.

第２Ａ図は、本発明の実施に用いたプレスの折り曲げ成
形加工部を示す一実施例の一部拡大正面図、第２Ｂ図は
前記図の一部拡大正面図を示す。FIG. 2A is a partially enlarged front view of one embodiment showing the bending and forming processing section of the press used in carrying out the present invention, and FIG. 2B is a partially enlarged front view of the above figure.

第３Ａ図と第３Ｂ図は折り曲げを示す一実施例の斜視図
、第３０図けあおりダイの一部拡大斜視図を示す、第３
０（１）図から第３０（９）図までの一連のものは、ス
テンレス鋼板をベースボールのホームプレート形（五角
形）基こ・・折り曲げと０矯正と修正管する過程を示す
一実施例のモデルを示す一部拡大正面図である。第４Ａ
図と第４Ｂ図は溶接のための突合せ部分の一例示正面図
を示す。第５図は一実施例の互角成形体の正面図の例示
モデルであって、互角成形体の溶接の一部を円形に成形
しＯ鳩止全するためのものである。第６Ａ図は溶接部分
の装置側面図、第６Ｂ図は溶接部における管体？示す正
面図である。第６Ｃ図は同平面図である。3A and 3B are perspective views of one embodiment showing folding, FIG. 30 is a partially enlarged perspective view of the tilting die, and FIG.
The series from Figure 0 (1) to Figure 30 (9) is an example showing the process of bending, straightening, and correcting a stainless steel plate into a baseball home plate shape (pentagon). It is a partially enlarged front view showing the model. 4th A
Figures 4B and 4B show an exemplary front view of the butt portion for welding. FIG. 5 is an illustrative model of a front view of a rectangular molded body according to an embodiment, in which a part of the welded part of the rectangular molded body is formed into a circular shape and is completely fixed with an O-shaped dovetail. Figure 6A is a side view of the device at the welded part, and Figure 6B is the pipe body at the welded part? FIG. FIG. 6C is a plan view of the same.

第２Ａ図と第２Ｂ図について、第３Ａ図と第３Ｂ図を参
照して説明する。所定形状、例えば各定尺管用に必要な
板厚のステンレス鋼板から所要の長さと幅を有する管用
原板を裁断して準備しまたはエンドレス状に製管する場
合には適合するステンレス鋼帯を準備し、折り曲げプレ
ス＆Ｂの折り曲げ部ＡＢＣに設けたあおりダイ３Ａと３
Ｂの面上に装入する。この際、装入原板ｌは、プレス本
体に備えた下部支持盤５４に固着した台盤５３の装着盤
５７に固着盤４０をもって固着する。あおりダイ３Ａと
３Ｂとは左右対称形で、このダイの間に複数のロールｌ
Ｏと上下作動軸４９ｔ−下方に備える。このダイの中央
上方には、折り曲げ加工をするためのボ′（ンチ６を備
え、ポンチ６の先端の鋼板ｌこ当接し抑圧成形をする部
分７は、曲げに適合した形状７Ａを付しである。FIGS. 2A and 2B will be explained with reference to FIGS. 3A and 3B. Prepare a predetermined shape, for example, by cutting a stainless steel plate with the required thickness and thickness for each fixed length pipe, or prepare a suitable stainless steel strip when manufacturing an endless pipe. , tilting dies 3A and 3 installed at the bending part ABC of the bending press &B.
Load onto side B. At this time, the charging original plate l is fixed with the fixing plate 40 to the mounting plate 57 of the base plate 53 fixed to the lower support plate 54 provided in the press body. The tilt dies 3A and 3B are symmetrical, and there are multiple rolls between them.
O and the vertical operating shaft 49t-provided below. A punch 6 for bending is provided at the upper center of the die, and the portion 7 at the tip of the punch 6 that comes into contact with the steel plate and presses it has a shape 7A suitable for bending. be.

準備し装入した準備鋼板ｌは、第２Ａ図に示すように、
あおり台表面を水平水準に平行な平面に保って、ロール
コンベア４８Ａ上を搬送して成形部に装入さ力る。その
一端ＩＧを所定の位置にセットする。次にあおりダイ３
Ａと３Ｂ上の鋼板ｌの第一の折り曲は部に、プレスの支
持盤５１の装着部５５に、支持固着部５２をもって一定
の位置に固着したポンチ６の成形部７を、プレスの支持
盤５１を押し上げて、板１上に当接する。次にあおり台
の支持軸５Ａと５Ｂを、シリンダー機構４２Ａと４２Ｂ
とを作動し、軸４Ａと４Ｂとを押し上げ第一の成形をし
辺ＩＣを形成する。最終的には第３Ｂ図に示すようなペ
ースポールのホームプレート形の左右対称の五角形の成
形体として、この成形の過程で溶接前の折り曲げをし、
次に軸４９を押し上げロール１０によって送り出し、あ
おりダイは、もとの平面水平の状態にもどす。The prepared steel plate l prepared and charged is as shown in Fig. 2A.
While keeping the surface of the tilt table parallel to the horizontal level, the material is transported on the roll conveyor 48A and charged into the molding section. One end of the IG is set in a predetermined position. Next, Aori Dai 3
At the first bend of the steel plate l on A and 3B, the forming part 7 of the punch 6 fixed in a fixed position with the support fixing part 52 is attached to the mounting part 55 of the support plate 51 of the press. The board 51 is pushed up and comes into contact with the board 1. Next, attach the support shafts 5A and 5B of the tilting stand to the cylinder mechanisms 42A and 42B.
and then push up the shafts 4A and 4B to perform the first forming and form the side IC. The final product is a symmetrical pentagonal molded body in the shape of the home plate of the pace pole as shown in Figure 3B.
Next, the shaft 49 is sent out by the push-up roll 10, and the tilt die returns to its original horizontal state.

あおり台と成形の過程を第３０図と第３０α）図から第
３０（９）図に、一実施例について例示した一連の図面
に基づいて説明する。The tilt table and the molding process will be explained based on a series of drawings illustrating one embodiment in FIG. 30 and FIG. 30α) to FIG. 30(9).

この例示実施例は、定尺ステンレス鋼板を、第３Ａ図と
第３Ｂ図に例示したように、あおり台３Ａ（３Ｂ）と、
管定尺長に等しい長さのポンチ６とでもって、鋼板を左
右移動し、縦方向ｌこ同時に所定の成形を行うバッチ式
のものであるが、他の方式、例えば連続してエンドレス
状管を成形する場合にも、少しの変形を伴うが、はとん
ど同じ技術思想が適用できる。いま、第３Ａ図と第３Ｂ
図に例示した場合を、これらの代表例として説明する。In this illustrative embodiment, a fixed length stainless steel plate is fixed to a tilting table 3A (3B) as illustrated in FIGS. 3A and 3B.
This is a batch type in which a punch 6 with a length equal to the specified length of the pipe is used to move the steel plate left and right and form the steel plate in the longitudinal direction at the same time. Even when molding, the same technical concept can be applied, albeit with some slight modification. Now, Figure 3A and Figure 3B
The case illustrated in the figure will be described as a representative example of these.

あおりダイは、その一実施例を例示した第３０図に示す
ように、左右対称の平坦面３３Ａ（３３Ｂ）を備えた２
個の丈夫な鋼製定盤３Ａと３Ｂとから成る。いま説明を
明瞭にするために、右側の部の符号を用い左側の部の符
号はカッコ内に記す。これらの２個の定盤３Ａと３Ｂは
、表面に適当な高さの円周が突出した任意の複数個のコ
ロ３４　Ａ　（３４Ｂ）を備え、折り曲げ時の鋼板の変
形による滑りをよくする。また、一定の等距離をおいて
対向する側壁面３３人（３３Ｂ）と、この面方向゛の定
盤３Ｎ（３Ｂ）に備えた盤３　Ａ　（３Ｂ）を支持し該
盤を周に自在に回転できる支持軸５Ａ（５Ｂ）と、該軸
５Ｎ（５Ｂ）に対し盤３Ａ（３Ｂ）に固着し傾斜度を示
す指針５０とプレス本体に固着した支持板８Ａ（８Ｂ　
）に固着した目盛板８Ｃと、他端に備えた支持軸４Ａ。As shown in FIG. 30, which shows an example of the tilt die, the tilt die has two symmetrical flat surfaces 33A (33B).
It consists of two strong steel surface plates 3A and 3B. For clarity of explanation, the numbers for the parts on the right are used, and the numbers for the parts on the left are in parentheses. These two surface plates 3A and 3B are provided with a plurality of optional rollers 34A (34B) with protruding circumferences of appropriate heights on their surfaces to improve sliding due to the deformation of the steel plate during bending. In addition, the side wall surface 33 (33B) facing each other at a certain equal distance and the plate 3A (3B) provided on the surface plate 3N (3B) in the direction of this surface are supported, and the plate can be freely rotated around the surface. A rotatable support shaft 5A (5B), a pointer 50 fixed to the plate 3A (3B) and indicating the degree of inclination with respect to the shaft 5N (5B), and a support plate 8A (8B) fixed to the press body.
) and a support shaft 4A provided at the other end.

（４Ｂ）と、該軸４Ａ（４Ｂ）に備えた支持端４６でプ
レス本体に装着したシリンダー機構４２（第２Ｂ図では
４２Ａと４２Ｂ）と、これらを組み合わせ友もので、折
り曲げ用あおり台を構成する。鋼板１を装入する前には
盤面２３Ａと２３Ｂとは平坦な平面を水平に維持し、鋼
板１の折り曲げの際には、第３Ｂ図などに示すようｌこ
、シリンダ４３（第２Ｂ図では４３Ａと４３Ｂ）内に流
体圧を導入し軸（第２Ｂ図では４１と４１Ｂ）を作動し
、軸頭を固着した軸４人（４Ｂ）を押し上げ、あおりダ
イ３人を傾斜させ、ポンチ６の抑圧折り曲げとともに成
形する。(4B) and the cylinder mechanism 42 (42A and 42B in Fig. 2B) attached to the press body with the support end 46 provided on the shaft 4A (4B), and these are combined to form a folding tilting stand. do. Before charging the steel plate 1, the plate surfaces 23A and 23B are kept flat horizontally, and when bending the steel plate 1, the cylinder 43 (in Fig. 2B) is 43A and 43B) to actuate the shafts (41 and 41B in Figure 2B), push up the four shafts (4B) with fixed shaft heads, tilt the three tilting dies, and press the punch 6. Forming with compression bending.

次にあおりダイ３Ｎと３Ｂを用い五角形の成形体を形成
する工程について説明する。第３０ａ）図に示すように
、板端ＩＧをセットした盤３Ｎと３Ｂの水平面上の鋼板
ｌに、プレスの上部盤５１と軸５９−Ｎと５９Ｂの案内
とで、支持盤５２でプレス部分５５に固着したポンチ６
を押し下げ、所定の個所９に、ポンチ先端部７の成形面
７人を当接する。次に第３０（２）図に示すように、盤
３にと３Ｂとを相対称して傾斜を付はボンテロで押し第
一の折り曲げをし角度θ２（第５図、普通は９０度）ｔ
−付し、面ＩＣを形成し、次に第３０（３）図に示す第
二の折り曲げを銅板の反対端に行い相対称面１０を角度
θ３（普通は９０度）を付して形成する。Next, a process of forming a pentagonal molded body using tilt dies 3N and 3B will be described. As shown in Fig. 30a), the upper plate 51 of the press and the guides of the shafts 59-N and 59B are placed on the steel plate l on the horizontal plane of the plates 3N and 3B in which the plate end IG is set, and the press part is pressed with the support plate 52. Punch 6 stuck to 55
is pressed down, and the molding surface of the punch tip 7 is brought into contact with the predetermined location 9. Next, as shown in Fig. 30 (2), the plates 3 and 3B are tilted symmetrically and pressed with a bontero to make the first bend at an angle θ2 (Fig. 5, normally 90 degrees) t.
- to form a plane IC, and then make the second bend shown in Figure 30(3) on the opposite end of the copper plate to form a symmetrical plane 10 with an angle θ3 (usually 90 degrees). .

次に第３０（４）図に示すように板ｌを右に移動して面
１人を形成し、次に第３０（５）図に示すように而ＩＢ
を形成し角度θＳと０４を付し、次に第３０（６）図１
こ示すように下部中央６と角度θ６を形成する面ＩＤと
ｌＦＪとを形成する一面ＩＣとポンチ６との間には、き
わめて僅かであるが空隙を生ずるようにし、ポンチと鋼
板の接触をさける。次に第３０（７）図に示したように
、形成した五角形の成形鋼板を１型し、ロールコンベア
０８Ａと０８Ｂ）ｆ！Ｉ上に移送する。Next, as shown in Figure 30(4), move the plate l to the right to form one surface, and then as shown in Figure 30(5), move the plate l to the right.
, and attach angles θS and 04, then 30th (6) Fig. 1
As shown, a very small gap is created between the punch 6 and the one-face IC that forms the surfaces ID and lFJ that form the angle θ6 with the lower center 6 to avoid contact between the punch and the steel plate. . Next, as shown in FIG. 30(7), the formed pentagonal steel plate is molded into one mold, and roll conveyors 08A and 08B)f! Transfer onto I.

０鋼板はスプリングバックし、同図に示し、また第１Ｂ
図に示したような形体になる。特に板厚が薄くなると、
例えば３ｕ厚さのものが１６０のものの場合よりも著し
くスプリングバックするが、この対応法として、面ｌＯ
とＩＡおよびｌＣとＩＢの成形時（第３０（２）図、第
３０（３）図の場合ノに考慮して成形することができる
が、第１０図に示す溶接部９がロール１１の面に接して
面１０が平行で、適正に接合し、良好な溶接面を形成す
る程度に成形する。板厚が大になると、第４Ａ図に示す
ように突合溶接部に角度θ１に示す切欠を付し、薄くな
ると第４Ｂ図に示す切欠がなく突合部の縁面が密着に近
いようにする。切欠け、厚さ１６１１１の場合に、０１
が６０〜９０度、好ましくは７０度、また１、／１鵞比
が１．２〜４で好ましくは２．５〜３．０の場合４こ良
好な結果をもたらし、第４Ａ図のように切欠を下部ｌこ
まで付さない場合が良好であった。0 steel plate springs back, as shown in the same figure, and 1B
The shape will be as shown in the figure. Especially when the plate thickness becomes thinner,
For example, a product with a thickness of 3u will have a more significant springback than a product with a thickness of 160mm.
When forming IA, IC, and IB (the cases shown in FIGS. 30(2) and 30(3)), the welded part 9 shown in FIG. The plate is formed to such an extent that the surface 10 is parallel to the surface 10, properly joined, and a good welding surface is formed.When the plate thickness becomes large, a notch shown at an angle θ1 is formed in the butt weld as shown in Figure 4A. When the thickness becomes thinner, there is no notch as shown in Fig. 4B, and the edge surface of the abutting part is close to close contact.In the case of a notch and a thickness of 16111,
When the angle is 60 to 90 degrees, preferably 70 degrees, and the 1/1 ratio is 1.2 to 4, preferably 2.5 to 3.0, good results are obtained, as shown in Figure 4A. The case where the notch was not made to the lower part was good.

スプリングバックした五角形成形体（第３０（７）図、
第１Ｂ図）は、第１Ｂ図および第１Ｃ図に示すように矢
印Ａ方向とＢ方向とＣ方向とＤ方向とから適正に押して
適正な被溶接適応体形を維持し、次の溶接工程を実施す
る。Spring-backed pentagonal shaped body (Fig. 30(7),
(Fig. 1B), as shown in Fig. 1B and Fig. 1C, press properly from the arrow A direction, B direction, C direction, and D direction to maintain the proper shape of the body to be welded, and then carry out the next welding process. do.

五角形体は、上面ｌＣの接合平坦面を形成し下向溶接を
し、面ＩＡとＩＢとに接触挾持するコンベア移動を容易
にし、面ＩＤとｔｇとを複数の斜めコンベアロール０８
による支持搬送を容易にし、下端中央部７７が搬送ロー
ルｌＯ１押上軸４９（第２Ｂ図）の適用を容易にする。The pentagonal body forms a joining flat surface of the upper surface 1C, is welded downward, and facilitates movement of the conveyor that contacts and clamps the surfaces IA and IB, and connects the surfaces ID and tg to a plurality of diagonal conveyor rolls 08.
The lower end central portion 77 facilitates the application of the transport roll lO1 push-up shaft 49 (FIG. 2B).

成形時に不適応な応力をかけ、内部歪を発生させると、
持碁こステンレス鋼は引張り強さ分母に対する降伏強さ
および弾性限分子との比が普通鋼より大であるほか、内
部すべりによる応力腐食割れの原因となり易い傾向があ
るから、第５図に示す各辺間の折り曲げ部分の曲げ半径
は小にすることは避け、また折り曲げ部も円形体の一部
になるのであるから、ゆるやかなものでよい。五角形の
寸法的に適当な割合は、１１１／ｈ３の比が１〜１．５
、好ましくは１．１〜１．３が良好である。また角度は
、θ意、θ３．θ６が約９０度、θ４とθＳが１３０−
１５０度、好ましくは１３５度を基準にしたものがよい
ことが確認できた。また五角形の占める曲げ外端が製造
管内周に近いのがよく、このように五角形体は真円管に
移行加工するのになじみが良く適していることがきわめ
て明確であった。If maladaptive stress is applied during molding and internal strain is generated,
Mochiko stainless steel has a higher ratio of yield strength and elastic limit numerator to tensile strength denominator than ordinary steel, and also tends to cause stress corrosion cracking due to internal slippage, so each of the conditions shown in Figure 5 is The bending radius of the bent portion between the sides should not be made small, and since the bent portion also becomes part of the circular body, it may be a gentle radius. An appropriate dimensional ratio of a pentagon is a ratio of 111/h3 of 1 to 1.5.
, preferably 1.1 to 1.3. Also, the angle is θ, θ3. θ6 is approximately 90 degrees, θ4 and θS are 130-
It was confirmed that it is better to set the angle to 150 degrees, preferably 135 degrees. In addition, the bent outer end of the pentagon should be close to the inner periphery of the manufacturing tube, and it is very clear that the pentagonal body is well suited for transition processing into a perfect circular tube.

この実施例のようなバッチ式の成形の場合に比較して、
エンドレス形式の成形の場合にも同様にできるが、ポン
チ６と成形端７を用いないで、外形から上下左右の案内
成形のロールを用いて行う場合には、下部７７形成を両
端曲げ１０形我と同時に行って溶接部０９または９（第
６Ｂ図）を上面に形成することができる。Compared to batch molding like this example,
The same thing can be done in the case of endless type molding, but if the punch 6 and the forming end 7 are not used and the rolls are used to guide the forming from the top, bottom, left and right from the outside shape, the lower part 77 is formed by bending both ends and forming the 10-shape. A weld 09 or 9 (FIG. 6B) can be formed at the same time on the top surface.

五角形体の被溶接体は、実際には、１ａ６Ｂ図と第６０
図に平面図で示すように、面ＩＡに当接するエンドレス
コンベア１８の面３８と、面１８番こ当接するエンドレ
スコンベア１７の面３７とヲモって、五角形体を挾持し
、面ｌＯの接合部０１４とＯＩＢとを完全に接合して、
溶接部ｏ９を形成する。面１ｃの上部は、第６Ａ図に示
すロール１２　、１３　、１５で押圧して平面を維持し
、トーチ１９Ａで仮付溶接をしま次はロール１２と１３
の間で仮付溶接をし、トーチ９Ａでまたはその位置の都
合でトーチ１９Ａのいずれかをもって本溶接をする。こ
うして面ｌＣ上に溶接部ぜジット溶着部９０を形成し、
溶接ｌこよる一体面１００を形成し、溶接管とする。前
記の挾持コンベア１８と１７とは、挾持面（第６Ｂ図）
３８と３７を繊維製の平ベルトまたはチェンコンベアに
図外の面アタッチメントに耐摩耗性エラストマー被覆板
を付したものを用いる。The pentagonal object to be welded is actually shown in Figures 1a6B and 60th.
As shown in the plan view in the figure, the pentagonal body is held between the surface 38 of the endless conveyor 18 that comes into contact with the surface IA and the surface 37 of the endless conveyor 17 that comes into contact with the surface 18, and the joint of the surface 10 014 and OIB are completely joined,
A welding part o9 is formed. The upper part of surface 1c is pressed with rolls 12, 13, and 15 shown in FIG. 6A to maintain a flat surface, and tack welding is performed with a torch 19A. Next, rolls 12 and 13 are pressed.
Temporary welding is performed between the parts, and main welding is performed using either torch 9A or torch 19A depending on its position. In this way, a welded part 90 is formed on the surface 1C,
An integral surface 100 is formed by welding to form a welded pipe. The aforementioned clamping conveyors 18 and 17 are clamping surfaces (Fig. 6B).
38 and 37 are flat belts or chain conveyors made of fibers with an abrasion-resistant elastomer covering plate attached to a surface attachment (not shown).

次に、焼鈍をし酸処理をし、その次の工程として第３０
（８）図１こ正面図で示したように、次のステーション
に送入し、定尺管の場合は複数に分割した部分について
、円形内面を有する上型２１と対をなす対称形の下型２
ｏとで、型接面２１Ａと２ＯＡおよび２１Ｂと２０Ｂと
が所定の関係位置を維持して、部分的に円形にＯ矯正成
形をする。この際の正面には円形管と未加工の五角形と
が見られる。押圧力”を強くしたプレスによれば、分割
しないで一体同時成形をすることができる。次に、要す
れば、下型２０を円形型で、上型が第３０　（９）図に
示したＶ形または三角形断面上型２９を用い真円度を有
するように整形を完成する。Next, annealing and acid treatment are performed, and the 30th step is the next step.
(8) As shown in the front view of Fig. 1, the tube is fed to the next station, and in the case of a fixed-length tube, the portion divided into multiple pieces is placed under a symmetrical mold that pairs with the upper mold 21 having a circular inner surface. Type 2
o, the mold contact surfaces 21A and 2OA and 21B and 20B maintain predetermined relative positions, and O correction molding is performed in a partially circular shape. At this time, a circular tube and an unfinished pentagon can be seen on the front. By using a press with a strong pressing force, it is possible to simultaneously form one piece without dividing it.Next, if necessary, the lower mold 20 is a circular mold and the upper mold is a circular mold as shown in Fig. 30 (9). The shaping is completed using a V-shaped or triangular cross-section upper die 29 so that it has roundness.

溶接をする時は、先ず空通しをして溶接部の接合と位置
と姿勢とを整のえ、仮付後に本溶接をする。無仮付本溶
接をすることもできるが、通常は仮付本溶接をする。無
仮付の場合は、・クイズの開き（第６０図０１８とＯＩ
Ａも一例）とパイプの進行とを適正に調整し、安定ビー
ド形成をするように留意する。仮付ピッチは、通常５０
〜１００ｕとする。When welding, first weld the joint, position and posture of the welded part by welding, and then perform the final welding after tack welding. Although it is possible to perform tack-less regular welding, tack-less regular welding is usually used. In the case of non-temporary attaching, - Quiz opening (Fig. 60 018 and OI
(A is also an example) and the progression of the pipe should be adjusted appropriately to form a stable bead. The tacking pitch is usually 50
~100u.

豐すれば、短くしまたは長くする。If desired, shorten or lengthen.

溶接は、板厚にも依存するが、例えば３＋ｕ厚さの場合
はプラズマ一層、さらに厚くなればティグ溶接をし１＋
はミグ溶接をした上にティグ溶接を補加する。本発明の
実験例を、第１表と第２表−こ示す。The welding method depends on the plate thickness, but for example, if the thickness is 3+U, we will use plasma welding, and if it is even thicker, we will use TIG welding.
In addition to MIG welding, TIG welding is added. Experimental examples of the present invention are shown in Tables 1 and 2.

第１表　良好な溶接が得られた一実施例良好な溶接を得
るためには、ロールによる接合維持とトーチ保持とが確
実で適正でなければならない。例えば９Ａか１９Ａか適
正なトーチの位置を選択する。Table 1 Examples of Good Welding In order to obtain good welding, the joint maintenance by the rolls and the torch holding must be reliable and appropriate. Select the appropriate torch position, for example 9A or 19A.

第２表　仮付後に押圧しない無拘束本溶接いずれの場合
も無拘束溶接は可能であった。Table 2: Unrestrained actual welding without pressing after tack welding Unrestrained welding was possible in both cases.

溶接ビードは、通常のグラインダーで通常の研削研磨で
除去することができるがビード除去の後に溶接不良のチ
ェックをする必要がある。Weld beads can be removed by normal grinding and polishing using a normal grinder, but it is necessary to check for weld defects after bead removal.

溶接し、ビード研磨後番こ焼鈍炉中で第３表のような条
件下で焼鈍をした結果−りが発生するが、問題にするほ
どのものではない。後の矯正と成形で除去することがで
きる。As a result of welding and bead polishing, annealing is performed in a steel annealing furnace under the conditions shown in Table 3, but this is not enough to cause a problem. It can be removed with subsequent straightening and shaping.

第３表　焼鈍の条件と歪の発生（管長４．０００　Ｕ）
取扱上の表面ひっかきを生じないようにする。Table 3 Annealing conditions and strain occurrence (pipe length 4.000 U)
Avoid surface scratches during handling.

歪、冷却歪、製品−りが発生するが、後の矯正と成形で
除去することができる。Distortion, cooling distortion, and product warpage occur, but these can be removed by subsequent straightening and molding.

溶接管素体は、こうして製造されるが、その形状を五角
形体から真円にし同時に曲りをとるための０矯正をする
。第３０　（８）図に示し説明したとおりである。分割
上型２１と下型２ｏにより矢印ＥとＦ方向にプレスし０
矯正をする。０矯正に加えテＶ型修正を行う。■修正は
必要な場合に行うが、通常、０矯正の出口に設け、第３
０（９）図に一実施例を示すように、逆Ｖ字形の直線平
面で０７角度を有する上型２９と０矯正下型２０を間隔
ｉ＝だけあけて下型を分割して離して用いる。こうして
真円と真直と所定長とを付して矯正し修正した鋼管とし
て送出する。この矯正過程を酸洗前に行うか、または成
形・溶接過程に行うか、もしくは一部迅速簡易焼鈍後で
あって０矯正前に行うかについては、通常は、板厚が大
な場合は、溶接後焼鈍し、次に真円真直矯正をし酸洗す
るのが良く、設備もこれに適合させる。The welded pipe body is manufactured in this manner, and the shape is changed from a pentagonal body to a perfect circle, and at the same time, zero correction is performed to remove the bend. This is as shown and explained in FIG. 30 (8). Press in the directions of arrows E and F using the split upper mold 21 and lower mold 2o.
make corrections. In addition to 0 correction, Te-V correction is performed. ■Correction is performed when necessary, but it is usually installed at the exit of 0 correction, and the third
As shown in FIG. 0(9), an upper die 29 having an angle of 07 on a straight plane in an inverted V shape and a lower correcting die 20 are separated by an interval i=, and the lower die is used. . In this way, the steel pipe is corrected to be perfectly round, straight, and of a predetermined length, and sent out as a corrected steel pipe. As for whether to perform this straightening process before pickling, during the forming/welding process, or after partial quick annealing and before zero straightening, if the plate thickness is large, It is best to anneal after welding, then straighten and pickle, and the equipment should be suitable for this.

これらのＯ矯正、■修正または併用の場合。には、浴接
ｖｌの内面には型を用いないで、外側から管内に向けた
方向に加圧押当して行う。In the case of these O corrections, ■ corrections or combinations. In this case, the inner surface of the bath contact vl is pressed with pressure from the outside toward the inside of the pipe without using a mold.

酸洗は、管の外方から行う。酸洗時間は溶接部［４こ適
合させて密室内（図示せず）で行い、中和、水洗および
乾燥を、ひきつづき行う。これらの酸洗過程内では、酸
洗前の管の脱油脂と脱塵とが重要であり、水洗乾燥を完
全に実施しない場合には表面の光反射まだら模様を顕現
させるから、これらを注意しなければならない。酸また
は温水のシャワーごとに金属繊維または適当な繊維地で
ふきとり、シャワーをくりかえす。酸の濃度と温度は常
法に従う。Pickling is carried out from the outside of the tube. The pickling time was carried out in a closed room (not shown) by adapting the four welded parts, followed by neutralization, water washing and drying. In these pickling processes, it is important to degrease and dust the pipe before pickling, and if water washing and drying are not completely carried out, a light-reflecting mottled pattern will appear on the surface, so be careful of these. There must be. Wipe with metal fiber or suitable fabric after each shower with acid or hot water and repeat showers. Acid concentration and temperature follow conventional methods.

前記した成形の五角形体のほかに、三角形体、四角形体
、六角形体、１２角体および同体などについて検討した
。三角形体は加工度が高く、後日配管使用時に部分加工
度に原因する欠陥を生ずるおそれがあり、１２角体は手
数を要する。用途に応じこれらのうちから任意に選んだ
形体を用いる。′五角形体が、もっとも便利で、したが
って良好であった。In addition to the above-mentioned shaped pentagonal bodies, triangular bodies, quadrangular bodies, hexagonal bodies, dodecagonal bodies, dodecagonal bodies, and the like were investigated. The triangular body requires a high degree of machining and may cause defects due to the degree of partial machining when the piping is used later, and the dodecagonal body requires a lot of work. A shape arbitrarily selected from among these is used depending on the purpose. 'The pentagonal shape was the most convenient and therefore the best.

すでに説明したように、本発明では、鋼板を折夛曲げて
所定の形状にし、上部に溶接部分を形成し中央に被溶接
部を完全に突合せ接合をするため、上下左右から完全な
溶接適合性を有する五角形を維持し、この維持のために
、五角形の上面と下部とをロールで押圧し、左右をエン
ドレスコンベアをもって進行させるように挾持して押圧
し、上面中央の接合部を仮付をし本溶接をし溶接五角形
体管を形成する。次に、溶接ビードを研削研磨、した後
、次に焼鈍し、次に冷却をする。この際に表面きずの形
成と曲りの発生をきわめて少にし、次に脱油脂と脱塵な
どの処理をした後、酸洗し、水洗し、乾燥し、次に五角
形体を内面円形の上型と下型とをもって円形体に０矯正
をするプレス成形加工をし、さらに、要すれば、０矯正
の直後に、上型に逆Ｖ形の内面直平面を有する上型と牟
円形の下型とをもって修正成形をする。As already explained, in the present invention, a steel plate is repeatedly bent to form a predetermined shape, a welded part is formed at the top, and the part to be welded is completely butt-jointed in the center. Therefore, perfect welding compatibility from the top, bottom, left and right is achieved. In order to maintain this pentagon, the top and bottom of the pentagon are pressed with rolls, the left and right sides are held and pressed so that they are moved forward by an endless conveyor, and the joint at the center of the top is temporarily attached. Perform main welding to form a welded pentagonal body tube. Next, the weld bead is ground and polished, then annealed, and then cooled. At this time, the formation of surface flaws and the occurrence of bending are minimized, and after degreasing and dedusting, the pentagonal body is washed with acid, washed with water, and dried. Press molding is performed to perform zero correction on the circular body with the upper mold and the lower mold, and if necessary, immediately after the zero correction, the upper mold has an inverted V-shaped inner surface perpendicular to the upper mold and a circular lower mold. Correct molding is performed with.

こうし゛て製造した大径のステンレス鋼管は、その真円
度と真直度が、在米の溶接管に比較してきわめて顕著に
良好である。また良好な管材質を示し、過圧なバッチ式
の製造による定長管および連続自動化ｌこよる足長管の
提供をすることができる。The large-diameter stainless steel pipe thus manufactured has significantly better roundness and straightness than welded pipe produced in the United States. In addition, it exhibits good pipe material quality and can provide fixed-length pipes by overpressure batch-type manufacturing and foot-long pipes by continuous automation.

すでに、ステンレス鋼管について説明したが、本発明を
発展させれば、他の金属、例えば銅、アルミ、チタンそ
の他の金属についても、応用することによって適用でき
る。このような場合に、金属の種類によっては焼鈍また
は酸洗が不必要であり、加工押圧力とか溶接に多少の相
違がある。特に断面多角形体を形成し溶接後に円形ζこ
成形し真円真直に仕上げることによって良好な溶接管を
製造することができる。こうして、本発明によれば、作
業性、効率、品質およびコストにおいて、きわめ〔顕著
に良好なステンレス大径管の製造の方法および製造の装
置を提供することができ、産業上の利用について、きわ
めて大きな成果が期待できる。Although a stainless steel pipe has already been described, the present invention can be applied to other metals, such as copper, aluminum, titanium, and other metals. In such cases, annealing or pickling may not be necessary depending on the type of metal, and there may be some differences in processing pressure and welding. In particular, a good welded pipe can be manufactured by forming a polygonal cross-sectional body and shaping it into a circular shape after welding to make it perfectly round and straight. Thus, according to the present invention, it is possible to provide a method and apparatus for manufacturing large diameter stainless steel pipes that are extremely good in terms of workability, efficiency, quality, and cost, and are extremely suitable for industrial use. Great results can be expected.

【図面の簡単な説明】[Brief explanation of the drawing]

第１Ａ図は本発明の一実施例のフローシート。 第１Ｂ図、第１Ｃ図および第１Ｄ図は、本発明の一実施
例の互角成形体から真円真直管を製造する一過程の正面
図。第２Ａ図は本発明の一実施例の一部拡大正面図、第
２Ｂ図は同一部拡大正面図。 第３Ａ図と第３Ｂ図は折り曲げ一実施例の斜視図、第３
０図はめお９ダイの一部拡大斜視図。第３０（１）図か
ら第３０　（９）図にわたる一連のものは、一実施例の
鋼板の折り曲げと円修正など成形過程の一部拡大正面図
。第４Ａ図と第４Ｂ図は溶接のための突合せの一例示正
面図。第５図は一実施五角成形体の正面図。第６人図は
溶接部装置の側面。第６Ｂ図は同管体の正面図。第６０
図は同平面図。 ！　ステンレス鋼板、成形する鋼板 ０１　　成形管　　　　１００　　溶接ずみ管１人、　
ｌｆ３．１０．　ＩＤ、　ＩＫ　　成形面（辺）Ａ、　
Ｂ、　Ｏ，Ｄ、　Ｅ、　Ｆ　　矢印方向２　ステンレス
鋼管 ３、３＆、　３Ｂ　　あおりダイ（定盤）４、４Ａ、　
４Ｂ　　シリンダー機構装着軸、ｉ５．５人、　５Ｂ　
　定盤支持軸、支点軸５０　　指針　　　　　８Ｃ目盛
板 ６　ポンチ ７　ポンチ成形（端）部　　７Ａ　　成形面ｓ、　８Ａ
、　８Ｂ　　４ｅ５の支持盤（位置一定）９．０９　　
接合部、被溶接部 １９、１９Ａ、　１９Ｂ　　溶接トーチ９０　　溶接ピ
ード １０、１１．１２．１３．１５　　　ロール１７、１７
Ａ、　１８．１８人　コンベアベルト３７、３８　　コ
ノペアベルトの接面 ２５、２６．２９．３０　　コンベア駆動ロール肚　プ
レス部分　　ＡＢＣプレス成形部分１１＊　’２．ｔｌ
、　）ｌｌ＋　ｈａ　　寸法□　θｌ・θ冨、θ３Ｉθ
４書θｓＩθ＠ｐθ７角＆２０　　下型 ２１、２９　　上型 ２０Ａ、　２０Ｂ、　２１Ａ、　２１Ｂ　　型の合せ面
２３Ａ、　２３Ｂ　　あおりダイの平坦面３３人、３３
Ｂ　　あおりダイの側壁面３４Ａ、　３４Ｂ　　コロ ４２、４１．４２Ｂ　　　シリンダー機構４３：４３Ａ
、　４３Ｂ　　　シリンダー４６、４６＆、　４６Ｂ　
　　シリンダ一端４１Ａ、　４１Ｂ　　ピストン軸 ４４、４５　　シリンダー支持台 ４７　　定盤面板 ７９　　鋼板の折曲個所 ＩＧ　　板端 特許出願人　　日本金属工業株式会社 代理人　弁理土中西　−FIG. 1A is a flow sheet of one embodiment of the present invention. FIG. 1B, FIG. 1C, and FIG. 1D are front views of one process of manufacturing a perfect circular straight pipe from an evenly spaced molded body according to an embodiment of the present invention. FIG. 2A is a partially enlarged front view of one embodiment of the present invention, and FIG. 2B is a partially enlarged front view of the same. Figures 3A and 3B are perspective views of one embodiment of folding;
Figure 0 is a partially enlarged perspective view of Meo9 die. A series of figures from Fig. 30(1) to Fig. 30(9) are partially enlarged front views of the forming process such as bending and circular correction of the steel plate in one embodiment. FIG. 4A and FIG. 4B are front views showing an example of butt for welding. FIG. 5 is a front view of one embodiment of the pentagonal molded body. Figure 6 shows the side view of the welding device. FIG. 6B is a front view of the tube. 60th
The figure is the same plan view. ! Stainless steel plate, steel plate to be formed 01 Formed pipe 100 Welded pipe 1 person,
lf3.10. ID, IK Molding surface (side) A,
B, O, D, E, F Arrow direction 2 Stainless steel pipe 3, 3 &, 3B Tilt die (surface plate) 4, 4A,
4B Cylinder mechanism mounting shaft, i5.5 people, 5B
Surface plate support shaft, fulcrum shaft 50 Pointer 8C scale plate 6 Punch 7 Punch forming (end) part 7A Forming surface s, 8A
, 8B 4e5 support plate (fixed position) 9.09
Joint part, welded part 19, 19A, 19B Welding torch 90 Welding speed 10, 11.12.13.15 Rolls 17, 17
A, 18. 18 people Conveyor belt 37, 38 Contact surface of conopear belt 25, 26. 29. 30 Conveyor drive roll belly Press part ABC press forming part 11 * '2. tl
, )ll+ha Dimensions □ θl・θto, θ3Iθ
Book 4 θsIθ@pθ7 angle &20 Lower mold 21, 29 Upper mold 20A, 20B, 21A, 21B Mold mating surface 23A, 23B Flat surface of tilt die 33, 33
B Side wall surface of tilt die 34A, 34B Roller 42, 41.42B Cylinder mechanism 43: 43A
, 43B Cylinder 46, 46&, 46B
Cylinder one end 41A, 41B Piston shaft 44, 45 Cylinder support base 47 Surface plate face plate 79 Steel plate bending point IG Sheet end patent applicant Nippon Metal Industries Co., Ltd. agent Benri Do Nakanishi -

Claims (1)

【特許請求の範囲】 １　　所定の形状寸法を付した大径ステンレス鋼溶接管
製造用鋼板を成形プレスの成形部に設けたあおりダイ盤
面上に配置し、該鋼板を縦方向に両端および所定部分を
折り曲げて左右対称をなす断面多角形体を形成し、該成
形体の上面と下端部番こおいてそれぞれ当接支持する上
と下のロールおよび同時に前記成形体の左右側面を挾持
し推進する左右コンベアをもって前記成形体を支持して
、被溶接部を突合せ接合して成形体を推進しながら溶接
して鋼管を形成し、線成形溶接鋼管を焼鈍した後に真円
真直に成形することを特徴とした大径ステンレス鋼管製
造の方法。 ２　　溶接すべき左右対称に折り曲げて形、′成した断
面多角形体が、左右最大側幅に対する上下最大高さの比
１１〜１．５倍に上下寸法全人ｌこし、該多角形体の上
面に平坦な被溶接部を上面中央において突合せ接合をし
た溶接部を配する五角形体である特許請求の範囲の第１
項に記載の大径ステンレス鋼′！！Ｆ製造の方法。 ３　　所定の形状寸法を付した大径ステン・レス鋼浴接
管製造用鋼管をプレス成形用の上下動自在に鋼板の所定
個所をプレス押圧し所定断面多角形を有する成形体形成
ポンチおよびプレス成形位置にセットするめおりダイを
備えた成形機構部と、該めおりダイは一定間隔で左右対
称に配置した２個の定盤と該定盤を一端においてプレス
本体固着支持板ｌこ回転自在に装着し一足位置に維持す
る定盤支点軸と他端Ｉこおいて上下作動用シリンダー機
構の作動軸頭装着軸−とから成り、前記の成形機構部に
おいて成形した所定形状寸法の断面多角形体の上辺と下
部を押当するロールと左右両側面を挟持推進するエンド
レスコンベア接面とを゛もって形体維持をしながら溶接
し冷却する溶接機構部と、該浴接管焼鈍後に分割した上
型と下型とでブレスＯ矯正とＶ修正をもって真円真直管
を形成する機構部と、酸洗・水洗・乾燥の機構部と、こ
れらの前２．記の各機構部を連結する搬送部を設けて、
鋼板を多角成形体とし突合せ溶接をして鋼管とし焼鈍し
て真円と真直の鋼管を形成することを特徴とした大径ス
テンレス鋼管製造の装置。 ４　一定の間隔をもって左右対称に配置するあおりダイ
の２個の定盤のそれぞれに備える定盤支点軸は、平坦な
表面の下部に盤体を貫通支持して設け、該軸の端はプレ
ス本体固着支持板に備えた軸孔に回転角表示指針を固着
し前記固着支持板に固着した目盛板とともに装着し、ポ
ンチの鋼板プレス押圧に対応して必要な傾斜をそれぞれ
の定盤に相対称して与えるシリンダー機構作動をするも
のである特許請求の範囲の第３項に記載の大径ステンレ
ス鋼管製造の装置。 ５　　鋼板の成形に一端にゆるやかに勾配を付しｆｃ９
０度の第一の折り曲げをし他端ｌこ９０度の第二の折り
曲げをしＶ＃接する面暴こゆるやかな勾配を付して第三
の折り曲げをし対称面を第四の折り曲げをし鋼板中央部
に対し第五の折り曲げで五角形体を形成−するものであ
る特許請求の範囲の第３項番こ謹己賊の大径ステンレス
鋼管製造の装置。[Claims] 1. A large-diameter stainless steel welded pipe manufacturing steel plate with predetermined shapes and dimensions is placed on the tilting die board surface provided in the forming section of a forming press, and the steel plate is vertically moved at both ends and at a predetermined portion. is bent to form a polygonal body with a symmetrical cross section, and upper and lower rolls contact and support the upper and lower ends of the molded body, respectively, and left and right conveyors simultaneously hold and propel the left and right sides of the molded body. A large steel pipe characterized by supporting the formed body, butt-joining the parts to be welded, welding while propelling the formed body to form a steel pipe, and forming the wire-formed welded steel pipe into a perfect circle and straight after annealing. Method of manufacturing diameter stainless steel pipe. 2. The cross-sectional polygonal body to be welded is symmetrically bent and shaped, and the vertical dimension is 11 to 1.5 times the ratio of the maximum vertical height to the maximum horizontal width, and the upper surface of the polygonal body is The first claim of claim 1 is a pentagonal body in which a flat welded part is butt-jointed at the center of the upper surface.
Large-diameter stainless steel described in section ′! ! F manufacturing method. 3. A punch to form a formed body having a predetermined polygonal cross-section by press-forming a large-diameter stainless steel bath welding pipe manufacturing steel pipe with a predetermined shape and dimensions by pressing a predetermined portion of a steel plate in a vertically movable manner for press-forming, and a press-forming position. The forming mechanism is equipped with a molding mechanism equipped with a blinding die that is set in a press body, two surface plates arranged symmetrically at regular intervals, and a supporting plate fixed to the press body at one end of the two surface plates. It consists of a surface plate fulcrum shaft that is maintained at one foot position, and a shaft on which the operating shaft head of the cylinder mechanism for vertical operation is attached at the other end. It consists of a welding mechanism that welds and cools while maintaining its shape using a roll that presses the lower part and an endless conveyor contact surface that clamps and propels both left and right sides, and an upper mold and a lower mold that are separated after annealing the bath welding pipe. A mechanical part that forms a perfectly round straight pipe with breath O correction and V correction, a mechanical part for pickling, water washing, and drying, and 2. A conveyance section is provided to connect each of the mechanical sections described below,
A device for manufacturing large diameter stainless steel pipes characterized by forming steel plates into polygonal bodies, butt-welding them, and annealing them to form perfectly round and straight steel pipes. 4. The surface plate fulcrum shaft provided for each of the two surface plates of the tilting die, which are arranged symmetrically with a certain interval, is provided at the lower part of the flat surface and is supported through the plate body, and the end of the shaft is attached to the press body. A rotation angle display pointer is fixed to the shaft hole provided in the fixed support plate, and is attached together with the scale plate fixed to the fixed support plate, and the necessary inclination is set symmetrically to each surface plate in response to the pressing force of the steel plate by the punch. 4. The apparatus for manufacturing large diameter stainless steel pipes according to claim 3, wherein the cylinder mechanism operates to provide the following effects. 5 Forming a steel plate with a gentle slope at one end fc9
Make the first bend at 0 degrees, make the second bend at 90 degrees on the other end, make the third bend with a gentle slope on the surface that touches V#, and make the fourth bend on the symmetrical surface. An apparatus for producing a large diameter stainless steel pipe according to claim 3, wherein a pentagonal body is formed by a fifth bend at the center of a steel plate.