JPS63165023A - Method for bending double pipe - Google Patents

Method for bending double pipe

Info

Publication number
JPS63165023A
JPS63165023A JP31020286A JP31020286A JPS63165023A JP S63165023 A JPS63165023 A JP S63165023A JP 31020286 A JP31020286 A JP 31020286A JP 31020286 A JP31020286 A JP 31020286A JP S63165023 A JPS63165023 A JP S63165023A
Authority
JP
Japan
Prior art keywords
pipe
bending
metal plate
vibrator
polymerized
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.)
Pending
Application number
JP31020286A
Other languages
Japanese (ja)
Inventor
Toshiaki Fujishiro
藤城 利明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP31020286A priority Critical patent/JPS63165023A/en
Publication of JPS63165023A publication Critical patent/JPS63165023A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE:To obtain a smooth bend pipe by abutting a metal plate to the inner side periphery of the part on which the bending of a double pipe is executed, fixing one part of the double pipe to a bending die, bending the pipe by rotating the bending die and pressing a projecting part appeared on the surface of the pipe. CONSTITUTION:A bending is performed by interposing the metal plate 7 in the optimum thickness and dimension causing no wrinkles between a bending part 2 and double pipe 1. By doing so the pipe 1 and metal plate 2 become like a sandwich and owing to the metal material on the surface of the pipe 1 being press-welded to both materials causing no wrinkles at all at both sides the projecting part becoming a wrinkle is not caused on the inner periphery of the pipe 1. The excess part of a surface material caused by doubling appears by attaining to a linear projecting part on the upper and lower faces of the pipe on which no pressure is applied. This projecting part is pressed by a roll, etc., and made in a smooth face. The bending of a pipe can thus be performed without causing any trouble on the external appearance.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、軟鋼とステンレス鋼、軟鋼とアルミメッキ鋼
のような異種の金属を複合した重合パイプの曲げ加工方
法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for bending a polymer pipe made of a composite of different metals such as mild steel and stainless steel, or mild steel and aluminized steel.

(従来の技術) いわゆる重合パイプ、或いはタララドバイブと呼ばれる
ものは継ぎ目無しのステンレス鋼パイプ等に比べ安価で
、かつ重合した夫々の金属の特性を個々に発揮できるた
め、工業上の応用面が多岐にわたるものであるが、その
他これを車両等の手摺りや、支柱などに使用する場合に
はその外面の保護上極めて有効であると考えられる。
(Prior technology) So-called polymerized pipes or Talaladvibes are cheaper than seamless stainless steel pipes, etc., and can exhibit the characteristics of each polymerized metal individually, so they have a wide range of industrial applications. However, when it is used for handrails of vehicles, pillars, etc., it is considered to be extremely effective in protecting the external surface.

(本発明が解決しようとする問題点) ところで、通常はパイプを曲げ力日工しようとする場合
には、いわゆるバイブベンダーを利用することが多い。
(Problems to be Solved by the Present Invention) By the way, when attempting to bend a pipe on a daily basis, a so-called vibrator is often used.

これは、バイブの曲げ半径に一致した曲げ型を作り、該
型の一部にパイプを固定した後、該型を回転許せてバイ
ブを型に巻き付けるようにして加工を行なうものが一般
的であり、バイプの曲げ方向の内側面に順次圧力をかけ
て移動させていくものである。
This is generally done by making a bending mold that matches the bending radius of the vibrator, fixing the pipe to a part of the mold, and then allowing the mold to rotate and wrapping the vibrator around the mold. , the pipe is moved by sequentially applying pressure to the inner surface of the pipe in the bending direction.

ところが、重合パイプについては、従来から使用されて
いるどのようなタイプのバイブベンダーを利用しても、
曲げ加工部の内側周面にしわが発生する事態を避けられ
なかった。このしわは加工時の圧縮力による座屈が原因
であり、曲げ加工の際、バイブの曲げ内外側に引張応力
が発生し、この引張応力のために特にバイブの内側刃に
しわが発生するものである。これは、通常の鉄鋼バイブ
等の曲げ加工においても状況によって発生し得るもので
あるが、重合バイブは、例えば厚さが1.5mm程度の
軟嵌と0.2mm程度の肉薄のステンレス鋼を重合して
なるものであるから、バイブの外側のステンレス鋼と内
側の軟鋼の伸縮特性の相違等により、曲げ加工部の内側
表面のステンレス鋼が、内部の軟鋼よりも同−力に対し
より多く伸びるためしわが非常に発生しやすくなるもの
と考えられる。
However, for polymerized pipes, no matter what type of vibrator is used,
The occurrence of wrinkles on the inner circumferential surface of the bent portion could not be avoided. These wrinkles are caused by buckling due to compressive force during processing. During bending, tensile stress is generated on the inside and outside of the bending of the vibrator, and this tensile stress causes wrinkles, especially on the inner blade of the vibrator. be. This can occur depending on the situation when bending ordinary steel vibrators, etc., but polymerized vibrators, for example, are made by polymerizing a soft fit with a thickness of about 1.5 mm and a thin stainless steel with a thickness of about 0.2 mm. Because the stainless steel on the outside of the vibrator and the mild steel on the inside have different elastic properties, the stainless steel on the inner surface of the bent part stretches more than the mild steel on the inside for the same force. It is considered that wrinkles are extremely likely to occur.

かかる事情から、重合パイプの曲げ加工は容易には行な
えず、該バイブは外観がある程度重視される個所につい
ては、殆ど直管状のものしか使用できないのが現状であ
った。
Due to these circumstances, it is not easy to bend polymerized pipes, and at present, only straight pipe-like types of vibrators can be used in areas where appearance is important to some extent.

本発明は、上記の欠点を除去し、加工後にも外観上全く
問題を生じない重合パイプの曲げ加工方法を提供せんと
するものである。
The present invention aims to eliminate the above-mentioned drawbacks and provide a method for bending polymeric pipes that does not cause any problems in appearance even after processing.

(問題点を解決するための手段) 本発明は、かかる問題点を解決するために以下のような
構成としている。即ち、バイブの曲げ加工を施す部位の
内側刃に曲げ加工時の圧縮力によってはしわの発生しな
い金属板を当接きせ、該重合パイプの一部を曲げ型に固
定した状態のまま、成型を所定方向に回転許せて、曲げ
型とバイブの曲げ加工を施す部位の内側刃との間に金属
板が介在した状態でバイブを曲げ型に巻き付ける工程と
、バイブの一部表面に表れた凸部を押圧して該面を平滑
にする工程とからなるものである。
(Means for Solving the Problems) In order to solve the problems, the present invention has the following configuration. That is, a metal plate that does not wrinkle due to the compressive force during bending is brought into contact with the inner blade of the part of the vibrator that is to be bent, and while the part of the polymerized pipe is fixed in the bending die, the forming is carried out. The process of wrapping the vibrator around the bending die with a metal plate interposed between the bending die and the inner blade of the part of the vibrator to be bent while allowing rotation in a predetermined direction, and the protrusion that appears on a part of the surface of the vibrator. The process consists of a step of pressing to make the surface smooth.

(作用) かかる方法によれば、曲げによる加圧の際には、バイブ
表面の金属は、重合したしわの発生しない他の金属と、
それと同様にしわの発生しない金属板とに挾まれ、これ
らに圧接される。したがって、しわとなる凸がバイブの
内側刃に生じることが阻止され、バイブの外周面の一部
にスジ状になって集中する。これを押圧して該面を平滑
にするとしわの無いバイブが得られることになる。
(Function) According to this method, when applying pressure by bending, the metal on the surface of the vibrator is polymerized with other metals that do not generate wrinkles.
Similarly, it is sandwiched between wrinkle-free metal plates and pressed against them. Therefore, protrusions that become wrinkles are prevented from forming on the inner blade of the vibrator, and are concentrated in the form of streaks on a part of the outer peripheral surface of the vibrator. If this is pressed to make the surface smooth, a wrinkle-free vibrator will be obtained.

(実施例) 次に、本発明の一実施例について添付図面を参照しなが
ら説明する。
(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

本実施例は、軟鋼の表面にステンレス鋼を重合したバイ
ブ1についての曲げ加工の例であり、このバイブ1は、
第6図に示すような構造となっているものである。
This example is an example of bending a vibrator 1 made of mild steel with stainless steel polymerized on its surface.
It has a structure as shown in FIG.

第1図は、従来から使用されているパイプベンダーの概
略図である。同図において、2は曲げ型、4は固定テー
ブル、5.6はクランプである。該パイプベンダーを使
用して加工を行なう場合は、バイブ1の一部を曲げ型2
に固定した状態のまま、成型2を図示しない駆動源によ
り矢印方向に回転許せ、バイブ1を曲げ型2に巻き付け
るようにするものである。この方法によれば、通常の継
ぎ目無しの鉄鋼バイブ等については殆ど支障なく加工が
行なえるが、重合パイプでは第3図に示すように内側刃
1aにしわ8の発生が見られる。
FIG. 1 is a schematic diagram of a conventionally used pipe bender. In the figure, 2 is a bending die, 4 is a fixed table, and 5.6 is a clamp. When processing using the pipe bender, bend a part of the vibrator 1 into the mold 2.
The mold 2 is allowed to rotate in the direction of the arrow by a drive source (not shown) while being fixed to the bending mold 2, and the vibrator 1 is wound around the bending mold 2. According to this method, a normal seamless steel vibrator or the like can be processed with almost no problem, but wrinkles 8 are observed in the inner blade 1a of the polymerized pipe as shown in FIG. 3.

本発明に係る方法においても、上記の如きパイプベンダ
ーを使用して曲げ加工を行なうものであるが、最も特徴
的な点は上記加工時に、曲げ型2とバイブ1との間に曲
げ加工時の圧縮力によってはしわの発生しない鉄板等、
例えば適当な厚き、及び大きさの金属板7を介在させる
ことである。本実施例では成板7は鉄板に亜鉛をメッキ
したもの、即ちトタン板であり、その厚きは約1mm程
度で、かつ縦の寸法がバイブ1の直径よりも長く、また
横の寸法は曲げ加工部の長きと略一致する程度のものが
適当である。これは、人手、或いは機械によりバイブ1
の曲げ加工がされる部位の内側刃1cに当接されて、曲
げ型2を矢印方向へ駆動する際にバイブ1と共に送られ
て、第5図に示すように、成型2に圧接してバイブ1と
同時に加圧される。このようにするとステンレス114
 t a s軟鋼1bl及び金属板7とがサンドウィッ
チ状になり、バイブ1の表面のステンレス鋼1bは両側
の、加圧によっても全くしわの発生しない両鉄材に圧接
するため、バイブ1の内側周1cにはしわとなる凸を生
ずることができなくなる。したがって、加圧により生じ
たステンレス鋼1aの余剰な部分は、第5図に示すよう
に、圧力の加わらないバイブ1の上下面1e、 ldに
集中的にスジ状の凸部3となって表れる。
In the method according to the present invention as well, the pipe bender as described above is used to perform the bending process, but the most distinctive point is that during the process, there is a Iron plates, etc. that do not wrinkle due to compressive force,
For example, a metal plate 7 of appropriate thickness and size may be interposed. In this embodiment, the plate 7 is an iron plate plated with zinc, that is, a galvanized iron plate, and its thickness is about 1 mm, the vertical dimension is longer than the diameter of the vibrator 1, and the horizontal dimension is bent. It is appropriate that the length approximately corresponds to the length of the processed portion. This is done manually or by machine.
When the bending mold 2 is driven in the direction of the arrow, the inner blade 1c is brought into contact with the inner blade 1c of the part to be bent, and when the bending mold 2 is driven in the direction of the arrow, it is sent together with the vibrator 1, and as shown in FIG. Pressurized at the same time as 1. In this way, stainless steel 114
The mild steel 1bl and the metal plate 7 form a sandwich, and the stainless steel 1b on the surface of the vibrator 1 is pressed against both iron materials on both sides, which do not wrinkle at all even when pressurized, so that the inner circumference 1c of the vibrator 1. It becomes impossible to form convexities that become wrinkles. Therefore, as shown in FIG. 5, the excess portion of the stainless steel 1a generated by pressurization appears as streak-like protrusions 3 concentrated on the upper and lower surfaces 1e and 1d of the vibrator 1 where no pressure is applied. .

そこで、次の工程ではこの凸部3をロール等で擦るよう
ににて押圧し、バイブ1の上下面1e、 ldを平滑な
ものとする。この作業は、極めて簡単なものであり、迅
速、大量の加工が容易にできるため人手によって行なっ
ても不都合はない。
Therefore, in the next step, the convex portion 3 is pressed with a roller or the like to make the upper and lower surfaces 1e and ld of the vibrator 1 smooth. This work is extremely simple and can be done quickly and in large quantities, so there is no problem even if it is done manually.

すると、最終的にはしわの全く無い曲げ加工済みの重合
パイプPが得られることになる。
As a result, a bent polymer pipe P completely free of wrinkles is finally obtained.

尚、上記実施例は、軟鋼の表面にステンレス鋼を重合し
たパイプの曲げ加工について述べたが、他の金属からな
る重合バイブにも応用できることは勿論である。
In the above embodiment, bending of a pipe made of stainless steel polymerized on the surface of mild steel was described, but it goes without saying that the present invention can also be applied to polymerized vibrators made of other metals.

(効果) 以上、要するに本発明は、パイプの曲げ力a工を施す部
位の内側周に曲げ加工時の圧縮力によってはしわの発生
しない金属板を当接させ、該重合バイブの一部を曲げ型
に固定した状態のまま、成型を所定方向に回転させて、
曲げ型とパイプの曲げ加工を施す部位の内側周との間に
金属板が介在した状態でバイブを曲げ型に巻き付ける工
程と、パイプの表面に表れた凸部を押圧して平滑なもの
とする工程とからなるものであるから、重合パイプにつ
いて外観上の支障を全く生じさせることなく曲げ加工を
行なうことができる。特に、従来の加工装置をそのまま
使用して、これに僅かな工程を付加するのみで、容易に
実施できるため実用的な効果は極めて大きいものである
(Effects) In short, the present invention abuts a metal plate that does not wrinkle due to the compressive force during bending on the inner periphery of the part of the pipe where bending force a is applied, and bends a part of the polymerized vibe. Rotate the mold in the specified direction while it is fixed in the mold,
The process of wrapping the vibrator around the bending die with a metal plate interposed between the bending die and the inner periphery of the part of the pipe to be bent, and pressing the protrusions that appear on the surface of the pipe to make it smooth. Since the bending process consists of two steps, the polymerized pipe can be bent without causing any problems in appearance. In particular, it can be easily carried out by using conventional processing equipment as it is and adding only a few steps to it, so the practical effects are extremely large.

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

第1図は、従来から使用されているパイプベンダーの概
略図、第2図は、本発明の方法を実施する場合のベンダ
ーの主な構成部分の配置を示す図、第3図は従来の方法
で曲げ加工した重合バイブの斜視図である。また第4図
は、凸部を押圧してパイプの表面を平滑なものとする工
程を示す図、第5図は、本発明の実施における、パイプ
、曲げ型、及び金属板の関係を示す図、第6図は、重合
パイプの断面図である。 1・・・・・バイブ 2・・・・・曲げ型 3・・・・
・凸部4・・・・・固定テーブル 5.6・・・・・ク
ランプ7・・・・・金属板
Fig. 1 is a schematic diagram of a conventionally used pipe bender, Fig. 2 is a diagram showing the arrangement of the main components of the bender when implementing the method of the present invention, and Fig. 3 is a diagram of a conventional method. FIG. Fig. 4 is a diagram showing the process of smoothing the surface of the pipe by pressing the convex portion, and Fig. 5 is a diagram showing the relationship between the pipe, the bending mold, and the metal plate in the implementation of the present invention. , FIG. 6 is a cross-sectional view of the polymeric pipe. 1... Vibrator 2... Bending mold 3...
・Protrusion 4...Fixed table 5.6...Clamp 7...Metal plate

Claims (2)

【特許請求の範囲】[Claims] (1)重合パイプ(1)の曲げ加工を施す部位の内側周
(1c)に曲げ加工時の圧縮力によってはしわの発生し
ない金属板(7)を当接させ、該重合パイプ(1)の一
部を曲げ型(2)に固定した状態のまま、該型(2)を
所定方向に回転させて、曲げ型(2)と重合パイプ(1
)の曲げ加工を施す部位の内側周(1c)との間に上記
金属板(7)が介在した状態で重合パイプ(1)を曲げ
型に巻き付ける工程と、重合パイプ(1)の一部表面に
表れた凸部(3)を押圧して該面を平滑にする工程とか
らなることを特徴とする重合パイプの曲げ加工方法。
(1) A metal plate (7) that does not wrinkle due to the compressive force during bending is brought into contact with the inner periphery (1c) of the part of the polymer pipe (1) to be bent. With the part fixed to the bending die (2), rotate the die (2) in a predetermined direction to connect the bending die (2) and the polymerized pipe (1).
) and the inner periphery (1c) of the part to be bent, and the step of winding the polymer pipe (1) around a bending die with the metal plate (7) interposed between it and the part of the surface of the polymer pipe (1). A method for bending a polymerized pipe, comprising the step of smoothing the surface by pressing the convex portion (3) that appears on the surface.
(2)前記重合パイプ(1)は、軟鋼(1b)の表面に
ステンレス鋼(1a)を重合したものであり、前記金属
板(7)は、鉄板である特許請求の範囲第1項に記載の
重合パイプの曲げ加工方法。
(2) The polymerized pipe (1) is made by polymerizing stainless steel (1a) on the surface of mild steel (1b), and the metal plate (7) is an iron plate. A method of bending polymerized pipe.
JP31020286A 1986-12-26 1986-12-26 Method for bending double pipe Pending JPS63165023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31020286A JPS63165023A (en) 1986-12-26 1986-12-26 Method for bending double pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31020286A JPS63165023A (en) 1986-12-26 1986-12-26 Method for bending double pipe

Publications (1)

Publication Number Publication Date
JPS63165023A true JPS63165023A (en) 1988-07-08

Family

ID=18002408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31020286A Pending JPS63165023A (en) 1986-12-26 1986-12-26 Method for bending double pipe

Country Status (1)

Country Link
JP (1) JPS63165023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018130737A (en) * 2017-02-15 2018-08-23 株式会社キーレックス Pipe bender

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827957A (en) * 1971-08-13 1973-04-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827957A (en) * 1971-08-13 1973-04-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018130737A (en) * 2017-02-15 2018-08-23 株式会社キーレックス Pipe bender

Similar Documents

Publication Publication Date Title
US4033387A (en) Method of making a reinforcing strip
JP3817938B2 (en) Roll press device for battery electrode material processing
JPS63165023A (en) Method for bending double pipe
JPH03226327A (en) Forming method for mouth part of pressure container
US4059215A (en) Circular double-jacketed gasket with single joint
JPH0417731B2 (en)
JP2002035848A (en) Bending method for wide-flange shape steel and bending equipment for wide-flange shape steel
JP4061091B2 (en) Bending method and bending roll
CA2030526A1 (en) Process and Device for Heat-Forming a Laminated Plastic Sheet
JP3929182B2 (en) Roll forming equipment
JPH0332426A (en) Bending method for tube
JPH0261552B2 (en)
JPH05131220A (en) Method for bending composite metal sheet
JPS58103917A (en) Manufacture of large diameter square steel pipe
JPS6032899Y2 (en) Bent pipe forming equipment
JPH0431766B2 (en)
JPS63295025A (en) Pipe bending device
JP2002018526A (en) Hat shape forming/bending apparatus
JPH09168824A (en) Manufacture of metallic rolled pipe and device therefor
JPH05333A (en) Manufacture of metallic sheet curved in widthwise and longitudinal direction and device therefor
JPS59197317A (en) Method and device for bending sheet material
JPH0342968B2 (en)
JPS58128224A (en) Section bending device
GB2291609A (en) Pipe forming machine
JPH06297063A (en) Production of washer and washer