EP0070406A2 - Procédé de fabrication d'un tronçon de conduite tubulaire comportant au moins un coude placé entre des parties de tube droites - Google Patents

Procédé de fabrication d'un tronçon de conduite tubulaire comportant au moins un coude placé entre des parties de tube droites Download PDF

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Publication number
EP0070406A2
EP0070406A2 EP82105537A EP82105537A EP0070406A2 EP 0070406 A2 EP0070406 A2 EP 0070406A2 EP 82105537 A EP82105537 A EP 82105537A EP 82105537 A EP82105537 A EP 82105537A EP 0070406 A2 EP0070406 A2 EP 0070406A2
Authority
EP
European Patent Office
Prior art keywords
pipe
curvature
straight
bending
molding
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.)
Withdrawn
Application number
EP82105537A
Other languages
German (de)
English (en)
Other versions
EP0070406A3 (fr
Inventor
Walter Exner
Wolfgang Hoebusch
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.)
EMIL WOLFF MASCHINENFABRIK und EISENGIESSEREI GmbH
Original Assignee
EMIL WOLFF MASCHINENFABRIK und EISENGIESSEREI GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6135343&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0070406(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EMIL WOLFF MASCHINENFABRIK und EISENGIESSEREI GmbH filed Critical EMIL WOLFF MASCHINENFABRIK und EISENGIESSEREI GmbH
Publication of EP0070406A2 publication Critical patent/EP0070406A2/fr
Publication of EP0070406A3 publication Critical patent/EP0070406A3/fr
Withdrawn legal-status Critical Current

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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies

Definitions

  • the invention relates to a pipe molding for producing, in particular multi-curved pipe parts and a method for producing the molding.
  • tubular molded articles can be formed by pushing a straight pipe part onto a bent mandrel while expanding the diameter.
  • the pipe part is later subjected to a pre-beating process in order to make the cross-section oval and then to obtain a circular shape from the oval shape by pressure in the main axis.
  • the invention is essentially based on the object to provide a pipe molding for the manufacture of, in particular multiply curved pipeline parts as a finished part from the straight tube parts, in which spatial angle changes using ready angepreßter curva- be mer allows to a pipe part, and a manufacturing simplification and cheapening , especially by saving weld seams, is achieved.
  • a pipe part to be subjected to the curvature and, as is known, having a reinforced wall thickness due to the curvature, has at its ends a pipe leg that is integral with the pipe part and protrudes from the ends and has an outer diameter that is the outer diameter corresponds to the pipe part to be bent after bending.
  • the pipe molding according to the invention two or more of a curving to be subjected to pipe sections' spaced from each other adjacent to each other on which on facing sides of a leg connecting one they have with them einstükkigen pipe part.
  • the pipe molding according to the invention can be produced in such a way that the wall thickness is increased or thickened outwards by compression molding a straight pipe part in its longitudinal direction in pipe sections intended for bending.
  • This compression molding takes place in the heat, i.e. H. with straight pipe section heated to deformation temperature.
  • This process is characterized by its simplicity and quick feasibility.
  • the upsetting process produces a majority of outwardly thickened wall sections at a predetermined distance from one another, each of which serves to form a curvature.
  • the legs of the pipe molding can be brought into a desired angular position to the center line of the pipe part subjected to the curvature by bending.
  • the has the output straight pipe part forming the same dimension as the straight pipe routing.
  • the procedure is such that in a straight pipe part 2 thickened wall points or wall sections 3 and 4 are formed by upsetting, which takes place in the heat, at the points which are to be subjected to a bend .
  • the straight pipe part 2 is arranged between a fixed bearing 5 and a displaceable press head 6, which is under hydraulic displacement pressure.
  • a split compression sleeve 7 and 8 is provided on through the bends to be made certain points.
  • the recesses 9 in the interior of the compression sleeves are provided for the material displaced under the effect of the pressure exerted by the press head 6, so that 2 thickenings 10 form on the outside of the pipe part.
  • a core or a mandrel can be provided in the pipe part.
  • Detachable guide sleeves can also be provided between the bending points in order to prevent unwanted bulges of the pipeline part.
  • the compression sleeves are additionally designed on the inside in such a way that the compression molding process results in an ovalized cross section. The upsetting is expediently carried out when the workpiece is heated.
  • each elbow section is carried out in the manner indicated in FIG. 3 with the aid of male part 11 and female part 12, the pressing pressure of the male part being exerted hydraulically.
  • the pipeline section to be curved is brought into the pressing device in a correspondingly heated manner and pressed to a round cross section.
  • the legs 13 and 14 or c of the elbow can be of any length. After bending the er. Most curvature, the pipe part is moved further so that the next bending point or the next section reaches the press,
  • the legs of one elbow can be connected to the leg of an adjacent elbow by welding.
  • one leg is set a previous curvature in the leg facing this of the following curvature, wherein the next leg of this curvature can continue in the facing leg of a third curvature.
  • a spool contains three bends, this spool saves at least six welds compared to previously known designs. This is also an advantage when arranging or placing the necessary supports (suspensions), which can then be geographically flexibly arranged because of the missing welds on the prefabricated pool.
  • the costs to be taken into account essentially consist of the prefabrication, the subsequent tests and the final documentation.
  • the length of a thickened point is determined by the length of the curvature to be formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP82105537A 1981-06-25 1982-06-24 Procédé de fabrication d'un tronçon de conduite tubulaire comportant au moins un coude placé entre des parties de tube droites Withdrawn EP0070406A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124957 1981-06-25
DE19813124957 DE3124957A1 (de) 1981-06-25 1981-06-25 Verfahren zum herstellen von insbesondere mehrfach gekruemmten rohrleitungsteilen und nach dem verfahren hergestellter rohrleitungsteil

Publications (2)

Publication Number Publication Date
EP0070406A2 true EP0070406A2 (fr) 1983-01-26
EP0070406A3 EP0070406A3 (fr) 1984-03-21

Family

ID=6135343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105537A Withdrawn EP0070406A3 (fr) 1981-06-25 1982-06-24 Procédé de fabrication d'un tronçon de conduite tubulaire comportant au moins un coude placé entre des parties de tube droites

Country Status (4)

Country Link
EP (1) EP0070406A3 (fr)
JP (1) JPS5858935A (fr)
DE (1) DE3124957A1 (fr)
ZA (1) ZA824546B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938388A1 (de) * 1989-11-18 1991-05-23 Behr Gmbh & Co Verfahren zur herstellung u-foermiger rohrboegen fuer einen waermetauscher
CN113976663A (zh) * 2021-10-22 2022-01-28 中国原子能科学研究院 压力管制造方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410146C2 (de) * 1993-10-23 2000-06-15 Witzig & Frank Gmbh Vorrichtung zur Herstellung von Pressfittings
US7987690B2 (en) 2008-01-04 2011-08-02 Cerro Flow Products Llc Fluid conduits with integral end fittings and associated methods of manufacture and use
US7942456B2 (en) 2008-01-04 2011-05-17 Cerro Flow Products, Inc. Fluid conduits with integral end fittings and associated methods of manufacture and use
CN114558965A (zh) * 2022-03-11 2022-05-31 南通高新管件制造有限公司 一种船用管件弯头锻压整形设备及加工工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2228301A (en) * 1939-08-22 1941-01-14 Phelps Dodge Copper Prod Tube drawing method and apparatus
US2241083A (en) * 1938-11-07 1941-05-06 Diescher Tube Mills Inc Method of making upset seamless tubing
US2258242A (en) * 1940-09-27 1941-10-07 Phelps Dodge Copper Prod Apparatus for drawing tubes of multiple wall thickness

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE471645C (de) * 1929-02-18 Jakob Schmitz Verfahren zur Herstellung von Rohrbogen von moeglichst gleichmaessiger Wandstaerke
US2500813A (en) * 1947-09-25 1950-03-14 Rudolph E Fritsch Method of making pipe fittings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241083A (en) * 1938-11-07 1941-05-06 Diescher Tube Mills Inc Method of making upset seamless tubing
US2228301A (en) * 1939-08-22 1941-01-14 Phelps Dodge Copper Prod Tube drawing method and apparatus
US2258242A (en) * 1940-09-27 1941-10-07 Phelps Dodge Copper Prod Apparatus for drawing tubes of multiple wall thickness

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938388A1 (de) * 1989-11-18 1991-05-23 Behr Gmbh & Co Verfahren zur herstellung u-foermiger rohrboegen fuer einen waermetauscher
CN113976663A (zh) * 2021-10-22 2022-01-28 中国原子能科学研究院 压力管制造方法

Also Published As

Publication number Publication date
JPS5858935A (ja) 1983-04-07
EP0070406A3 (fr) 1984-03-21
ZA824546B (en) 1983-08-31
DE3124957C2 (fr) 1987-08-13
DE3124957A1 (de) 1983-01-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830121

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Owner name: EMIL WOLFF MASCHINENFABRIK UND EISENGIESSEREI GMBH

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Effective date: 19880406

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Inventor name: EXNER, WALTER

Inventor name: HOEBUSCH, WOLFGANG