JPS59163022A - Production of curved pipe material - Google Patents

Production of curved pipe material

Info

Publication number
JPS59163022A
JPS59163022A JP3800583A JP3800583A JPS59163022A JP S59163022 A JPS59163022 A JP S59163022A JP 3800583 A JP3800583 A JP 3800583A JP 3800583 A JP3800583 A JP 3800583A JP S59163022 A JPS59163022 A JP S59163022A
Authority
JP
Japan
Prior art keywords
pipe
bending
thickness
shaped
parts
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
JP3800583A
Other languages
Japanese (ja)
Inventor
Tsutomu Nagai
力 永井
Yoshio Ogawara
小川原　吉夫
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.)
SHIN NIPPON TANKO KK
Original Assignee
SHIN NIPPON TANKO KK
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 SHIN NIPPON TANKO KK filed Critical SHIN NIPPON TANKO KK
Priority to JP3800583A priority Critical patent/JPS59163022A/en
Publication of JPS59163022A publication Critical patent/JPS59163022A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B21D35/006—Blanks having varying thickness, e.g. tailored blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE:To obtain easily a curved pipe which is walled to an equal thickness and has high accuracy by forming a round bar-shaped blank material to a straight pipe-shaped semiprocessed product provided with the uneven wall thickness to be made eqaul in thickness by curving in the pipe part between the end parts of bulged and straight pipe parts and bending said product. CONSTITUTION:A desired pipe hole 1 is opened by forging, grinding etc. in a round bar-shaped blank material M over the entire length, and the 1st bulging part 2 for coupling is formed at one end thereof and an equally walled straight pipe-shaped part 3 at the other end. The uneven thickness to the extent that the part to be positioned on the inside in the stage of bending is thin and is increasingly thickly walled toward the outside and that these parts are made equal in thickness on account of the walldeformation occuring in the compressing force and stretching force in the axia line direction to be generated in the stage of bending the pipe part 4 between the parts 2, 3 is provided in said pipe part. The part 4 of the straight pipe-shaped semiprocessed product N formed in such a way is subjected to a bending treatment such as ironing or the like for the purpose of bending the same to an approximately 90 deg.C arc. The 2nd bulging part 3' for coupling as a result of build-up by driving, etc. is formed on the part 3 according to need and a finished product N' is obtd.

Description

【発明の詳細な説明】 本発明はスイベルジヨイント韮た４Ｆエルボ−継手の如
きはゾ９０度屈曲した管材が極めて容易に製造され、か
つ製造された管材はその屈曲管部に於ける内側及び外側
の肉厚が均一化されるようになしたことを特徴とする屈
曲管材の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides that a pipe material bent at 90 degrees, such as a swivel joint or a 4F elbow joint, can be manufactured very easily, and the manufactured pipe material has an inner surface and The present invention relates to a method for manufacturing a bent pipe material, characterized in that the outer wall thickness is made uniform.

従来、スイベルジヨイント等の屈曲管材の製造は、製造
素材として所定長さを具えた金属製管材を用い、こわを
適宜の曲げ加工を施すことに依りは７９０度の円弧状に
屈曲させ、然る後、その両端部に連結用膨大部を叩き出
し等（開口端部側から圧縮力を作用させ、圧縮変形に基
き肉盛状膨大部を形成する）に基き成形し、然る後、異
径管の場合は開口部附近の内径切削処理を施して完成品
を得ることを通例とした。Conventionally, in the production of bent pipe materials such as swivel joints, metal pipe materials with a predetermined length are used as manufacturing materials, and the stiffness is bent into an arc of 790 degrees by applying appropriate bending processing. After that, a connecting enlarged part is punched out at both ends (compressive force is applied from the open end side and a built-up enlarged part is formed based on compressive deformation), and then a different shape is formed. In the case of diameter pipes, it is customary to cut the inner diameter near the opening to obtain a finished product.

然し乍ら、このような製造方法であると、製造素材とし
て等肉の管材を使用する関係上、曲げ加工を施した際に
屈曲部の外側Ｃｔ肉延伸作用が生じ、またその内側には
肉圧縮作用か生じ、従って、屈曲完了後に於ては管材の
屈曲部外側と内側とでは肉厚に変化か生じてしまい、こ
れは必然強度上の弊害をもたらすことを余儀なくされた
。However, in this manufacturing method, since a tube material of the same thickness is used as the manufacturing material, when bending is performed, a Ct thickness stretching action occurs on the outside of the bent part, and a thickness compression action occurs on the inside thereof. Therefore, after the bending is completed, there is a change in the wall thickness between the outside and inside of the bent part of the pipe material, which inevitably causes problems in terms of strength.

本発明は上述した如き在来に於ける問題点の解消化を図
ったことを特徴さするものである。The present invention is characterized in that it attempts to eliminate the conventional problems as described above.

以下、本発明の具体的実施例を図面について詳細に説明
する。Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

第１図は金属材料製の丸棒状素材Ｍを示し、第２図は該
丸棒状素材Ｍに対し鍛造加工または研削及び中ぐり等の
加工に基く成形処理を施して得られた直管状半製品Ｎを
示したものであって、該半製品Ｎはその全長に互ってパ
イプ孔１を穿設すると共に一端部には連結用第１膨大部
２を形成し、葦だその他端部は後述する曲げ加工を施し
た後に必要に応じて連結用第２膨大部３′を形成するた
めの等肉厚の直管状部３が形成しである。　更に、該半
製品Ｎに於ける屈曲管を構成するためのパイプ部４は、
その屈曲時に内側にくる部分は肉薄に形成し、かつその
外側ｌこゆくｌこ従って肉厚大となるような所定の偏肉
性が付与さイ１ている（第３図参照）。Fig. 1 shows a round bar-shaped material M made of metal material, and Fig. 2 shows a straight tubular semi-finished product obtained by subjecting the round bar-shaped material M to a forming process based on processing such as forging, grinding, and boring. The semi-finished product N has pipe holes 1 drilled along its entire length, and a first enlarged part 2 for connection is formed at one end, and the other end of the reed will be described later. After the bending process is performed, a straight tubular portion 3 of equal thickness is formed to form a second enlarged portion 3' for connection as required. Furthermore, the pipe portion 4 for configuring the bent pipe in the semi-finished product N is
A predetermined thickness unevenness is provided such that the inner part when bent is thinner, and the outer part becomes thicker (see FIG. 3).

第４図（ま上記した半製品Ｎ０こ）７−けるパイプ管部
４をはゾ９０．度の円弧状に屈曲させるための屈曲処理
の一例たろしごき曲は方式を示したものであって、固定
ダイスＡｉこ該半？Ｒ品Ｎをセットすルサ共にレバーＢ
を介して該ダイスＡの周縁に沿って押え金Ｃを回転させ
、こイ１に基き半製品Ｎに於けるパイプ部４を屈曲する
。　尚、該半製品Ｎのセット時、そのパイプ部４はその
最も肉薄な部分が固定ダイスＡに接するように留意する
。　すなわち、レバーＢを介して押え金Ｃを回転させる
ことに依って、該押え金Ｃの圧力ｌこ基きパイプ部４は
屈曲変形さイ９るわけであるが、この時、該パイプ部４
のダイス部側は軸線方向に圧縮させらイ９乍ら屈曲する
と共にその押え金Ｏｊ）Ｉｌｌは軸線方向Ｏこ延伸させ
らイ１乍ら屈曲することとなる。　従って、パイプ部４
はそのあらかじめの偏肉性に基き上記のよ１うな屈曲処
理完了後は等白化さイするわけである（第５°図参照）
。　換言すると、半製品Ｎに於けるーくイブ部４の偏肉
性は上記の如き屈曲が完了した際ｌこ生する延伸及び圧
縮に基きその肉厚が等厚となるようにあらかじめ設定し
ておくものである。Fig. 4 (also the above-mentioned semi-finished product No. 7) - Pipe section 4 is removed from 90. An example of a bending process for bending into an arc shape of degrees shows the method, and the fixed die Ai is about half of the bending process. Lever B with Lusa to set R product N
The presser foot C is rotated along the periphery of the die A through the lever 1, and the pipe portion 4 in the semi-finished product N is bent based on the coil 1. When setting the semi-finished product N, care should be taken so that the thinnest part of the pipe portion 4 comes into contact with the fixed die A. That is, by rotating the presser foot C via the lever B, the pressure l of the presser foot C causes the pipe portion 4 to bend and deform.
The die portion side of the presser foot is bent as it is compressed in the axial direction, and its presser foot is bent as it is stretched in the axial direction. Therefore, the pipe section 4
Based on its pre-uniform thickness, it becomes uniformly white after the above-mentioned bending process is completed (see Figure 5).
. In other words, the thickness unevenness of the curved rib portion 4 in the semi-finished product N is set in advance so that the thickness thereof becomes equal based on the stretching and compression that occurs when the bending as described above is completed. It is something to keep.

以上のような屈曲処理を施すことＯこ依って第５図に示
す如く屈曲変形化さ、７また完成品Ｎ′が得られ、該完
成品Ｎ′はパイプ部４の肉厚は全長的かつ全周的に等し
い肉厚きなり、その／々ランキが全く生じないものとさ
イまた。　また、直管状部３はあらかじめ等肉厚なもの
としであるから、適宜管材に対する連結等のための端部
挿入または被着嵌合等が円滑になされることとなる。By performing the above bending treatment, a finished product N' is obtained which is bent and deformed as shown in FIG. If the thickness is the same all around the circumference, there will be no ranking at all. Further, since the straight tubular portion 3 is made to have the same thickness in advance, the end portion can be smoothly inserted or fitted for connection to the tube material as appropriate.

また、上記完成品Ｎ′には必要に応じてその直管状部３
に第６図及び第７図に示す如き連結用第２膨大部３′を
形成することも可能である。In addition, the finished product N' is provided with its straight tubular portion 3 as necessary.
It is also possible to form a second enlarged portion 3' for connection as shown in FIGS. 6 and 7.

こイ１は所謂叩き出し作業番こ依り、その開口端部側か
ら圧縮力を作用させ、圧縮変形に依る肉流動に基き第２
膨大部３′を形成するわけである。The meat 1 relies on the so-called pounding operation, in which a compressive force is applied from the open end side, and the meat flows due to the compression deformation.
This forms an ampulla 3'.

本発明は、所要の長さを具えた金属製丸棒状素材Ｍに対
し、所定の鍛造加工または研削等に依る成形処理を施す
ことによって、全長に互って所望のパイプ孔１か開設さ
れかつ一端に連結用第１膨大部２をまた他端には奪丙厚
の直管状部３を成形すると共に、該膨大部２と直管状部
３間のパイプ部４の肉厚を屈曲時に内側に位置する部分
が肉薄で外側に向うに従って次第１こ肉厚が増大し該パ
イプ部４の屈曲時に生ずる軸線方向の圧縮力及び延伸力
に基く肉変形に依り等厚化される程度の偏肉性を付与し
て成る直管状半製品Ｎを形成し、次に、上記パイプ部４
をはゾ９０度の円弧状に屈曲させるためのしご゛き曲げ
等適宜屈曲手段に基く屈曲処理を施し、然る後、必要に
応じて前記直管状部３に対し叩き出し等に依る盛肉に基
き連結用第２膨大部３′を成形するように成したことを
特徴とする屈曲管材の製造法に関するものである６ 本発明方法に依わば、在来の如く素材さして既存の管材
を用いこねに所定の屈曲処理を施すと云うよう番こ成し
た場合に生ずる屈曲部の偏肉性と云うような問題が全く
解消化され、従って、強度的バラツキが生じない良好な
る屈曲管材の製造が許容化されることとなる。In the present invention, a metal round bar-shaped material M having a required length is subjected to a forming process such as a prescribed forging process or grinding process, so that one desired pipe hole is formed along the entire length. A first enlarged part 2 for connection is formed at one end, and a straight tubular part 3 with a thickness of 100 cm thick is formed at the other end. Thickness is uneven to the extent that the wall is thin in the located part and gradually increases in thickness as it goes outward, and becomes equal in thickness due to wall deformation based on the axial compressive force and stretching force that occur when the pipe section 4 is bent. A straight tubular semi-finished product N is formed by imparting the above pipe portion 4.
The straight tubular portion 3 is subjected to bending treatment using appropriate bending means such as iron bending to bend it into a 90 degree arc shape, and then, if necessary, the straight tubular portion 3 is subjected to embossing by hammering out or the like. This invention relates to a method for manufacturing a bent pipe material characterized in that the second enlarged portion 3' for connection is formed based on the material.6 According to the method of the present invention, the material can be used as a conventional pipe material. This completely eliminates the problem of uneven thickness at the bent part that occurs when the kneading material is subjected to a predetermined bending process using a pipe. Manufacturing will be permitted.

更に本発明は、一端側の連結用膨大部はあらかじめ形成
しておき、他端側の連結用膨大部は屈曲処理後に必要に
応じて成形すると云う方式を採っているたぬ、例えば両
端にあらかじめ連結用膨大部を形成しておき、然る後屈
曲処理を施すと云うように成した場合、伺ねかの膨大部
が邪魔となり第４図に示す如き簡単なる屈曲手段たるし
ごき曲げ手法の採用、その他涌常屈曲手段の採用の各不
能性、または制限性が生ずることとなるが、本発明に依
イ１ばこのような問題点を全く解消化することとなる。Furthermore, the present invention adopts a method in which the connecting enlarged part on one end side is formed in advance, and the connecting enlarged part on the other end side is formed as necessary after bending. If an enlarged part for connection is formed and then subjected to the appropriate bending process, the enlarged part of the connecting part becomes a hindrance, and a simple bending method as shown in Fig. 4 is adopted. However, the present invention completely eliminates these problems.

以上詳述した通り、本発明に依れば等肉厚にしてかつ精
度のすぐれた屈曲管の成形が、在来の屈曲手段を用いて
容易に達成化さ１１るから、その利用価値はとみに高い
ものである。As described in detail above, according to the present invention, it is possible to easily form a bent tube with equal wall thickness and excellent precision using conventional bending means11, so its utility value is particularly high. It's expensive.

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

図は本発明の一実施例を示すもσ）であって、第１図は
本発明方法に用いる素材Ｍの正面図、第２図は該素材Ｍ
から成形さイまた直管状半製品Ｎ′の縦断面図、第３図
は第２図（こ於けるＸ−７ＬＸ線断面図、第４図は本発
明に於ける屈曲手段の一例を示す略図、第５図は屈曲処
理が施された完成品の縦断面図、第６図は連結用第２膨
大部を形成した完成品の正面図、第７図は同上縦断面図
である。 Ｍ・・・・丸棒状素材、Ｎ・・・・直管状半製品、Ｎ′
・・・・完成品、ユ・・・・パイプ孔、２・・・・連結
用第１膨大部、３・・・・直管状部、３′・・・・連結
用第２膨大部、４・・・・パイプ部、Ａ・・・・固定ダ
イス、Ｂ・・・・レバー、Ｃ・・・・押え金。 第１　口 竺 ダｊ２　口 第３０ 第４　口The figures show one embodiment of the present invention. Fig. 1 is a front view of the material M used in the method of the present invention, and Fig. 2 is a front view of the material M.
FIG. 3 is a longitudinal cross-sectional view of a straight tubular semi-finished product N' formed from the molded material, FIG. 3 is a cross-sectional view taken along the line X-7L in FIG. , FIG. 5 is a longitudinal sectional view of the completed product that has been subjected to the bending process, FIG. 6 is a front view of the completed product with the second enlarged portion for connection formed, and FIG. 7 is a longitudinal sectional view of the same. ...Round bar-shaped material, N...Straight tube-shaped semi-finished product, N'
...Finished product, U... Pipe hole, 2... First enlarged part for connection, 3... Straight tubular part, 3'... Second enlarged part for connection, 4 ... Pipe part, A ... Fixed die, B ... Lever, C ... Presser foot. 1st mouth 2nd mouth 30th mouth 4th mouth

Claims (1)

【特許請求の範囲】[Claims] 所要の長さを具えた金属製丸棒状素材Ｍに対し、所定の
鍛造加工または研削等の成形処理を施すことに依り、全
長に互って所望のパイプ孔ｌが開設されかつ一端に連結
用第１膨大部２をまた他端には等肉厚の直管状部３を成
形すると共に、該膨大部２と直管状部３間のパイプ部４
の肉厚を、屈曲時に内側に位置する部分が肉薄で外側に
向うに従って次第に肉厚が増大し該パイプ部４の屈曲時
に生ずる軸線方向の圧縮力及び延伸力に基く内変形に依
り等厚化される程度の偏肉性を付与して成る直管状半製
品Ｎを形成し、次に、上記パイプ部４をは７９０度の円
弧状に屈曲させるためのしごき曲げ等適宜手段に基く屈
曲処理を施し、然る後、必要に応じて前記直管状ｌ・部
３に対し叩き出し等に依る盛肉に基き連結用第２膨大部
３′を成形するように成したことを特徴とする屈曲管材
の製造法。By performing a prescribed forming process such as forging or grinding on a metal round bar-shaped material M having the required length, desired pipe holes l are opened along the entire length and one end is used for connection. A straight tubular part 3 of equal thickness is formed at the other end of the first enlarged part 2, and a pipe part 4 between the enlarged part 2 and the straight tubular part 3 is formed.
The wall thickness of the pipe section 4 is made uniform by internal deformation based on the axial compressive force and stretching force that occurs when the pipe section 4 is bent, with the wall thickness being thinner in the inner portion when bent and gradually increasing toward the outer side. A straight pipe-shaped semi-finished product N is formed by imparting thickness unevenness to the extent that The bending pipe material is characterized in that the second enlarged part 3' for connection is formed based on the thickening of the straight pipe-shaped part 3 by hammering out or the like, if necessary. manufacturing method.
JP3800583A 1983-03-08 1983-03-08 Production of curved pipe material Pending JPS59163022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3800583A JPS59163022A (en) 1983-03-08 1983-03-08 Production of curved pipe material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3800583A JPS59163022A (en) 1983-03-08 1983-03-08 Production of curved pipe material

Publications (1)

Publication Number Publication Date
JPS59163022A true JPS59163022A (en) 1984-09-14

Family

ID=12513453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3800583A Pending JPS59163022A (en) 1983-03-08 1983-03-08 Production of curved pipe material

Country Status (1)

Country Link
JP (1) JPS59163022A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107520275A (en) * 2017-09-14 2017-12-29 西安交通大学 A kind of method that HTHP thick-wall seamless road squeezes the curved combined shaping of forging
CN112222221A (en) * 2020-09-23 2021-01-15 无锡金羊管件有限公司 Forming process of reducing elbow made of stainless steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107520275A (en) * 2017-09-14 2017-12-29 西安交通大学 A kind of method that HTHP thick-wall seamless road squeezes the curved combined shaping of forging
CN107520275B (en) * 2017-09-14 2019-01-08 西安交通大学 The method that a kind of high temperature and pressure thick-wall seamless road squeezes the curved combined shaping of forging
CN112222221A (en) * 2020-09-23 2021-01-15 无锡金羊管件有限公司 Forming process of reducing elbow made of stainless steel

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