JPS6049815A - Bending device of straight pipe - Google Patents

Abstract

PURPOSE:To make the operation of bending work and the taking-out of a formed product easy by arranging oppositely a pair of outer dies, having each a die face having a semicircular cross section and a concentric curvature, and providing a core die, having a die face conformed to one side of the outer die faces, freely capably to go into or out of the space of the outer dies. CONSTITUTION:Respective outer dies 1, 2 having die faces 1a, 2a having each a semicircular cross section and a face curved with a concentric O curvature, are arranged oppositely, and one end of a core die 3 having a die face 3a conformed to the die face 1a is fixed to an arm 4 pivotally attached to a shaft having a center O. Next, after inserting a blank material (a) between the dies 1, 2 in a state that the die 3 is separated from the space between the dies 1, 2; the die 3 is inserted into the inside of material (a) by turning the die 3 between them, to fix the other end of die 3 to a supporting arm 6. When the die 2 is moved toward the die 1, the lower half part of material (a) is pressed against the die face 1a by the die 3 and is bent along the die face 1a, and also the upper half part of material (a) is bent along the die face 2a, then an elbow- shaped blank material (a) is formed. In this way, the operation of bending work and the taking-out of a formed product are easily performed, and the production efficiency is improved.

Description

【発明の詳細な説明】 本発明は短かい直管をイ・ψ曲させてエルゼを成形する
か、直管の端部を任意の方向に口！曲成形する等の直管
の曲げ加工装置に関する。[Detailed Description of the Invention] The present invention can be used to form an elbow by bending a short straight pipe, or by opening the end of the straight pipe in any direction. This invention relates to a straight pipe bending device for bending, etc.

従来直管を１曲させる和は所定の曲率に彎曲成形した６
型の一端を固定し、その他端から直管の端部を外型を通
して圧入し６型と外型との間隔によシ管を曲げることが
行はれ、或いは蔓ルーの場合はプレス加工等によシ弧状
に彎曲した樋状部材の２個を合体させて所定曲率のエル
ゼを成形することが一般に行はれているが、前者の場合
心型に対して直管を圧入するに尚）直管の内外面に著し
く摩擦抵抗を受けるため圧力に大きな動力を必要とする
こと並に６型を高温に加熱するを要することがアシ、更
に成形後石盤から曲管を引抜く場合にも特別の機構手段
を要する不便があり、且つその取出しに際して成形品に
傷を生ずる等の不利を有し、又後者の場合は２個の部材
を対向合致させてその両側接合縁を溶接するを要し、そ
の加工が甚だ煩雑であった。Conventionally, the sum of a straight pipe is curved to a predetermined curvature6.
One end of the mold is fixed, and the end of the straight pipe is press-fitted from the other end through the outer mold, and the pipe can be bent depending on the distance between the mold and the outer mold, or in the case of a straight pipe, press processing etc. It is common practice to form an elbow with a predetermined curvature by combining two gutter-like members that are curved into a straight arc, but in the former case, it is necessary to press fit a straight pipe into a core mold. Because the straight pipe experiences significant frictional resistance on its inner and outer surfaces, it requires a large amount of power to apply pressure, and it is also necessary to heat the mold 6 to a high temperature.Furthermore, special care is required when pulling out the curved pipe from the stone slab after forming. In the latter case, it is necessary to align the two members facing each other and weld the joining edges on both sides. , the processing was extremely complicated.

本発明は上記従来の不利を排して曲げ加工操作並に成形
品の取出しを極めて安易にし生産効率を向上させること
ｔａ的とするもので、断面半円形で且つ所定の同心曲率
で大小の円弧状型面を有する一対の外型を、その型面を
対向させ少なくとも一方を他方に対し移動可能とし１両
外型のいづれか一方の型面に合致する型面を有する円弧
状の石型の一端を、いづれか一方の外型に対し該外型の
型面の曲率中心を軸として回動し且つ固定できるように
した腕片に固着して、腕片に固着した石型を一対の外型
の間隔に対し出入自在に設けたことを特徴とする。The present invention aims to eliminate the above-mentioned disadvantages of the conventional method, extremely simplify the bending operation and take out of the molded product, and improve production efficiency. A pair of outer molds having arc-shaped mold surfaces, the mold surfaces facing each other, at least one of which is movable relative to the other, and one end of an arc-shaped stone mold having a mold surface that matches the mold surface of either one of the two outer molds. is fixed to an arm piece that can be rotated and fixed to one of the outer molds around the center of curvature of the mold surface of the outer mold, and the stone mold fixed to the arm piece is attached to the outer mold of the pair. It is characterized by being provided so that it can be moved in and out of the interval.

本発明の実施例を図面について説明する、第１図乃至第
８図は短い直管を素材ａとして、これを所望曲率のエル
ボに彎曲成形する＠置を示すもので、前記素材ａは第９
図で示すように直管材料を軸線に対し傾斜した線すで裁
断して４ｆｔ！１面台形の素材ａを得る。このように素
材ａを所定の台形に裁１１斤することにより曲げ加工に
よって両端開口部の整形されたエルボを得られ。Embodiments of the present invention will be explained with reference to the drawings, and FIGS. 1 to 8 show a process in which a short straight pipe is used as a material a and is bent into an elbow of a desired curvature.
As shown in the figure, straight pipe material is cut along a line that is inclined to the axis and the length is 4ft! Obtain a material a that is trapezoidal on one side. By cutting the material a into a predetermined trapezoid shape in this way, an elbow with well-shaped openings at both ends can be obtained by bending.

材料直管を無駄なく経済的に使用し得るが、曲げ加工後
両端開口部を整形する場合には台形に裁断することなく
所定寸法の短直管に裁断してよい。Straight pipes can be used economically without waste, but when shaping the openings at both ends after bending, the pipes may be cut into short straight pipes of predetermined dimensions instead of into trapezoids.

上記素材ａに曲げ加工を施す装置は、一対の外型ｉｌｌ
　＋２１と、核外型＋１ｌｆ２１間に出没させ得る石型
（３）とで構成される。The device for bending the material a is a pair of outer molds.
+21, and a stone type (3) that can appear between the extranuclear type +1lf21.

外型ｆｌｌｆ２＋は夫々断面半円形で同心０の曲率で’
ｒｔ曲する大小の樋状型面（ｌａｄ（２ａ）を有し、こ
れら外型＋１１　（２＋の各型面（ｌａ）（２ａ）を互
に対向させて、その一方例えば図示例では外型（ｌａ）
は固定し、これに対し他方の外型（２）を例えば油圧又
は電動機等を利用して移動させるようにした。尚必要に
よって両性型ｉｌ＋　＋２１共に移動させ得るようにし
てもよく、かくて両性型１１１＋２１を合致させるとき
は型面（ｌａ）（２ａ）によって希望する曲率によるエ
ルボの外形に相当する空間が形成されるようにした。石
型（３）は外ｆｆ１ｌｌ１１２１の各型面（ｌａ）（２
ａ　）と同心曲率で彎曲させた円弧状に形成し、その横
断面は第７図および第８図で示すように内外面のいづれ
か一面を外型１１１＋２１の各型面（ｌ　Ｎ　１　（’
２　ａ　）のいづれかに内接合致する半円状の型面（３
ａ）Ｋ形成した。図示例では円弧状石型（３）の彎曲外
面を型面（３ａ）としてこれを外型（１１の型面（ｌａ
）に合致させた場合を示す。The outer mold fllf2+ has a semicircular cross section and a concentric curvature of 0'
It has large and small gutter-like mold surfaces (lad (2a)) that bend rt, and these mold surfaces (la) (2a) of the outer mold +11 (2+) are made to face each other, while, for example, in the illustrated example, the outer mold ( la)
is fixed, and the other outer mold (2) is moved using, for example, hydraulic pressure or an electric motor. If necessary, it may be possible to move both the hermaphrodite molds 111+21, so that when the hermaphrodite molds 111+21 are matched, a space corresponding to the external shape of the elbow with the desired curvature is formed by the mold surfaces (la) and (2a). It was to so. The stone mold (3) has each mold surface (la) (2) of the outer ff1ll1121.
a), and its cross section is as shown in FIGS.
2 a) A semicircular mold surface (3
a) K was formed. In the illustrated example, the curved outer surface of the arc-shaped stone mold (3) is used as the mold surface (3a), and this is used as the mold surface (la) of the outer mold (11).
) is shown.

尚、石型１３）の断面の他半部並に前記半円状型面（３
ａ）の両側は適当に肉を削除して後述する曲げ加工に際
して、外型ｆｉ＋＋２１間に位置させた直管素材ａに石
型（３）を挿入するとき、素材ａの中心軸線と石型（３
）の軸線との位置ずれのため石型（３）の両側大径部が
挿入の支障とならないようにした。In addition, the other half of the cross section of the stone mold 13) and the semicircular mold surface (3)
Appropriately remove the flesh on both sides of a), and when inserting the stone mold (3) into the straight pipe material a located between the outer molds fi++21 during the bending process described later, the central axis of the material a and the stone mold ( 3
), so that the large diameter portions on both sides of the stone mold (3) do not interfere with insertion.

該石型（３）は第１図で示すように、その一端を一方の
外温（２）に対し、＃外型（２）の型面（２ａ）の曲率
中心０を軸として回動し得るように軸着（５）シた腕片
（４）の遊動端にボルト等で不動に結着固定し、腕片（
４）の回動に従って石型（３）を外型１１１ｔ２＋の曲
に同一の曲率を以って出没し得るよう回動させると共に
可動外型（２）と一体的に他方の外型１１１に対し移動
させ得るようにした。As shown in Fig. 1, the stone mold (3) rotates one end of the stone mold (3) about the center of curvature of the mold surface (2a) of the #outer mold (2) with respect to one of the external temperatures (2). Fix the arm piece (4) immovably with a bolt or the like to the free end of the arm piece (4) with the shaft attachment (5) attached so that the arm piece (4)
According to the rotation of 4), the stone mold (3) is rotated so that it can appear and retract with the same curvature in the curve of the outer mold 111t2+, and integrally with the movable outer mold (2) relative to the other outer mold 111. Made it possible to move it.

以上の装置において第１図で示すように外ｍ（１）（２
）を互に離隔し、且つ心ｍ（３１を両ｍ＋１１ｔ２１間
から離脱させて不作動位置に待機させた状態で、前記し
た素材ａを第２図で示すように外ｍ　ｉｌｌ　＋２１間
に装入保持させ、次で石屋（３）を待機位置から両型ｆ
ｉｌ　１２１間に回動して素材ａ内を挿通し、訪Ｉｃ？
型（３）の他端を可動外型（２）に取付けた支持腕（６
）に対しボルト等で不動に固着支持させる。In the above apparatus, as shown in FIG.
) are separated from each other, and with the core m (31 removed from between both m + 11 and t21 and waiting in the inoperative position, the above-mentioned material a is charged between the outer m + 11 and 21 as shown in Fig. 2). Hold it, then move Ishiya (3) from the standby position to both types f.
Rotate between il 121 and insert into material a, visit Ic?
The support arm (6) has the other end of the mold (3) attached to the movable outer mold (2).
) with bolts, etc.

この状態から可動外型１２）を他方の外型（１）に向っ
て移動すれば第２図で示す素材ａの下半部（は第３図で
示すように外温（２）と一体に移動する４型（３）によ
る加工によって外型（１１の型面（ｌａｌに沿って湾曲
し、素材ａの上半部もとり、に１故って外型（２）の型
面（２ａ）に沿った形状となって素材ａはエルボ状に成
形されるから次で支持ＦＩｌｉｔ６１との結着を解き腕
片を回動して仝図仮線で示すように石型（３）をエルヂ
状素材ａ内から弓１出し更に可動外型（２）を外型（１
）から上方に離反させてエルｉ成形素材ａを外温１１１
＋２１間から取出して曲げカロエを終る。If the movable outer mold 12) is moved toward the other outer mold (1) from this state, the lower half of the material a shown in FIG. The processing by the moving mold 4 (3) curves along the mold surface (lal) of the outer mold (11), and also removes the upper half of the material a, so that the mold surface (2a) of the outer mold (2) The material a is molded into an elbow shape, so next, untie it from the support FIlit 61, rotate the arm piece, and mold the stone mold (3) into an elbow shape as shown by the phantom lines in the figure. Take out the bow 1 from inside a and insert the movable outer mold (2) into the outer mold (1
) to the outside temperature 111.
Take it out from between +21 and finish bending it.

尚、本発明によるエルボ成形に際し、素、ｔｔ　ａの材
料種類或いは材料の肉厚によっては直管素材から一挙に
９０°エルゼを成形することに困難な場合もあシ又可能
にしても成形仕上りカニ悪い場合があるが、このときは
先づ「ぽから曲げ易１／ｉように第３図で示す曲率の大
きい型面（ｌａ）（２ａ）（３ａ）を有する外型ｉｌｌ
　＋２１と石型（３）を使用して成形し、次でこの成形
品を素材として更に曲率の小さい型面を有する外型と石
型によシ成形し、順次段階的に曲率を小さくした型を利
用し最終的に第４図並に第５図で示すように９０゜エル
ボに成形するもので、このように段階的に成形を行うこ
とによシ小さな動力によって確実に所望角度の曲げ加工
を行い得るが、勿論鋼管等の素材を対象とする場合は直
管から一挙に９０°エル７＋？形に成形し得られるもの
で成形回数に限定はない。When forming an elbow according to the present invention, it may be difficult to form a 90° elbow from a straight pipe material at once depending on the type of material or the thickness of the material. There are cases where the crab is bad, but in this case, first of all, make an outer mold with a mold surface (la), (2a), (3a) with a large curvature as shown in Figure 3, such as 1/i that is easy to bend.
+21 and a stone mold (3) are used to form the product, and then this molded product is used as a raw material and further molded into an outer mold and a stone mold that have a mold surface with a small curvature, and the curvature is gradually reduced. By using a small amount of power, the bending process can be performed reliably at the desired angle by forming the shape in stages, as shown in Figures 4 and 5. Of course, when dealing with materials such as steel pipes, it is possible to perform 90° L7+ from straight pipes all at once. It can be molded into any shape, and there is no limit to the number of times it can be molded.

又、成形品の内径に高精度を要するものに対しては、上
記成形作業後に該成形品を外型＋１１＋２１で固持して
腕片（４）の先端に球状体の整形用石屋を結着し、該腕
片（４）を強制的に回動することによシ整形用心型を成
型品内に圧入して内径を仕上げることができる。In addition, for molded products that require high accuracy in the inner diameter, after the above molding operation, the molded product is held by the outer mold +11+21 and a spherical orthopedic stone is tied to the tip of the arm piece (4). By forcibly rotating the arm piece (4), the shaping mold can be press-fitted into the molded product and the inner diameter can be finished.

次に第１１図および第１２図は直管の端末に曲げ加工を
施す場合を示すが、上記図示例における素材管ａは直管
の端末を略直角に彎曲したものの該彎曲部の端末を更に
曲げる場合即ち直管の端末を立体的に曲げる場合の実施
例を示し、該彎曲部の端末を前実施例と同様に各型面（
ｌａ）（２ａ）ｅ有する外型１１１ｆ２＋と円弧状型面
（３ａ）を有する石型（３）とから成る曲げ装置に導入
して、該直管を固定部材（７）で不動に保持し、前例と
同様に一方の外型（２）を他方の外型（１）に向って移
動させることによシ素材管ａの彎曲部端末を更に彎曲さ
せるもので、図示例の場合石型は固だ側の外型（１）に
対し、型面（１ａ）の曲率中心０を中心に回動する腕片
（４）に固定し、且つ心ｍ　＋ａ＋を外型＋１ｌｔ２１
間の作動位置に挿入した状態で腕片（４）をその回動軸
（５）に対し偏心位歯でビン（８）によシ係止して６軸
（３）を不動に固定し、その外側の型面（３ａ）と外型
（２）の型面（２ａ）とで素月管ａの端末を所定の曲率
に曲げるようにした。この場合前実施例のように曲げ加
工を段階的に施して希望の曲率に彎曲させることは任意
であり、更に曲げ装置に対して素材管ａの固定位置関係
を自由に設足することにより第１４１Ｍで示すように累
月ｃｔ’ｌ　ａ端末部の曲げ角α、更に該αによる曲げ
端末を更に任意方向に曲げ角βで曲げることができ所謂
管瑞末の立体的げが可能となって接続部のない彎曲部を
形成し得るので、例えばエルボ等の別の曲管材を利用し
て彎曲部を形成するもののように接続部において漏洩事
故を生ずる等の欠点を未然に防止し得られ、且つ配管工
事で面倒な曲管接続を省略し得る利点がある。Next, FIG. 11 and FIG. 12 show the case where the end of a straight pipe is bent. In the example illustrated above, the material pipe a has the end of the straight pipe curved at a substantially right angle, but the end of the curved part is further bent. An example is shown in which the end of a straight pipe is bent three-dimensionally, and the end of the curved part is bent on each mold surface (
la) (2a) Introducing the straight pipe into a bending device consisting of an outer mold 111f2+ having e and a stone mold (3) having an arc-shaped mold surface (3a), holding the straight pipe immovably with a fixing member (7), As in the previous example, by moving one outer mold (2) toward the other outer mold (1), the curved end of the raw material tube a is further curved, and in the illustrated example, the stone mold is solid. For the outer mold (1) on the other side, it is fixed to an arm piece (4) that rotates around the center of curvature 0 of the mold surface (1a), and the center m + a + is set to the outer mold +1lt21
With the arm piece (4) inserted into the operating position between them, the arm piece (4) is locked to the pin (8) by eccentric teeth with respect to its rotation axis (5), so that the sixth axis (3) is immovably fixed; The outer mold surface (3a) and the mold surface (2a) of the outer mold (2) bent the end of the moon tube a to a predetermined curvature. In this case, it is optional to perform the bending stepwise to achieve the desired curvature as in the previous embodiment, and furthermore, by freely setting the fixed positional relationship of the material tube a with respect to the bending device. As shown in 141M, the bending angle α of the terminal part of the ct'l a, and the bending terminal by this α can be further bent in any direction at the bending angle β, making it possible to form a so-called three-dimensional bend at the end of the tube. Since it is possible to form a curved section without a connecting section, it is possible to prevent the drawbacks such as leakage accidents at the connecting section, which occur when the curved section is formed using another curved pipe material such as an elbow. Another advantage is that troublesome curved pipe connections can be omitted during piping work.

このように本発明によるときは短い直管を゛彎曲させて
エルボを容易に成形し或いは直管の端末曲げ加工により
継目なしの彎曲部の成形又は立体的げが容易となシ、そ
の加工装置は一対の外型の間に累月管を位置させて一方
の外型と石屋とを他方の外型に対し移動させて成形を行
なうものであるから従来のプレス加工と同様に材料の彎
曲抵抗のみであシ、従って小さい動力で加工を施し得ら
れ、石型は外型の波面と同心曲率の円弧状にｇ曲し、こ
れを外型の一方にその型面の曲率中心を軸として回動す
る腕片に結着したから加工に際して素材管内への挿入並
に成形後の脱歴操作は円滑であ勺、素材管の出入れが至
極容易であるから作業効率は著しく向上し、冷間作業に
も適す等の効果を有する。As described above, according to the present invention, an elbow can be easily formed by bending a short straight pipe, or a seamless curved part can be easily formed or three-dimensionally bent by bending the end of a straight pipe. In this method, a monthly tube is positioned between a pair of outer molds, and one outer mold and the stone cutter are moved relative to the other to perform molding, so the bending resistance of the material is reduced in the same way as in conventional press working. The stone mold can be processed with a small amount of power, and the stone mold is curved into an arc with a curvature concentric with the wave surface of the outer mold, and this is rotated around the center of curvature of the mold surface on one side of the outer mold. Because it is tied to a moving arm piece, insertion into the material tube during processing and de-asphalting operation after forming are smooth.Since it is extremely easy to insert and remove the material tube, work efficiency is significantly improved, and cold It has effects such as being suitable for work.

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

図面は本発明の実施態様例を示すもので、第１図は側面
図、第２図、第３図、第４図並に第５図は彎曲成形作動
を示す裁断面図、第６図は第１図の側面図、第７図は第
２図の■−■線断面図、第８図は第３図の■−■線断面
図、第９図はエルボ成形用素材管の側面図、第１０図は
成形エルボの斜視図、第１１図および第１２図は他の実
施例を示す断面図、第１３図は第１１図のＸ１ｌｌ　−
Ｘｌｌ線断面図、第１４図は直管先端彎曲部の斜視図で
ある。 ｆｉｌ　１２１　・・・外型　（ｌａｌ（２ａ）−型面
（３）・・・心’ＩＩＬ　（３ａ　）・・・石型の型面
１４）・・・腕片　（５）・・・腕片の回動軸ａ・・・
素材管 第９図 第１０図The drawings show an embodiment of the present invention, and FIG. 1 is a side view, FIG. 2, FIG. 3, FIG. 4, and FIG. 1 is a side view, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 2, FIG. 8 is a sectional view taken along the line ■-■ in FIG. FIG. 10 is a perspective view of the molded elbow, FIGS. 11 and 12 are sectional views showing other embodiments, and FIG. 13 is the X1ll- of FIG. 11.
The sectional view taken along the line Xll and FIG. 14 are perspective views of the curved portion at the tip of the straight pipe. fil 121 ... Outer mold (lal (2a) - mold surface (3) ... Core 'IIL (3a) ... Stone mold surface 14) ... Arm piece (5) ... Arm piece The rotation axis a...
Material pipe Figure 9 Figure 10

Claims (1)

【特許請求の範囲】[Claims] 断面半円形で且つ所定の同心曲率で大小の円弧状型面を
有する一対の外型を、その型面を対向させて少くとも一
方を他方に対し移動可能とし、両性型のいづれか一方の
型面に合致する型面を有する円弧状の６型の一端を、い
づれか一方の外型に対し該外型の型面の曲率中心を軸と
して回動し且つ固定できるようにした腕片に固着して、
腕片に固着した６型を一対の外型１１１１２１の間隔に
対し出入自在忙殺けたことを特徴とする直管の曲げ加工
装置。A pair of outer molds having semicircular cross-sections and large and small arc-shaped mold surfaces with a predetermined concentric curvature, the mold surfaces facing each other so that at least one of them is movable relative to the other, and either one of the mold surfaces of the bisexual mold One end of the six arc-shaped molds having a mold surface that matches is fixed to an arm piece that can be rotated and fixed to one of the outer molds around the center of curvature of the mold surface of the outer mold. ,
A straight pipe bending device characterized in that a mold 6 fixed to an arm piece can be moved in and out of the gap between a pair of outer molds 111121.