DE920122C - Process for the production of elastic tubes by means of transverse waves - Google Patents

Process for the production of elastic tubes by means of transverse waves

Info

Publication number
DE920122C
DE920122C DEN3327A DEN0003327A DE920122C DE 920122 C DE920122 C DE 920122C DE N3327 A DEN3327 A DE N3327A DE N0003327 A DEN0003327 A DE N0003327A DE 920122 C DE920122 C DE 920122C
Authority
DE
Germany
Prior art keywords
production
transverse waves
elastic tubes
tubes
cross
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.)
Expired
Application number
DEN3327A
Other languages
German (de)
Inventor
Heinrich Lehmann
Dipl-Ing Heinrich Nieschalk
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.)
HEINRICH NIESCHALK DIPL ING
Original Assignee
HEINRICH NIESCHALK DIPL ING
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 HEINRICH NIESCHALK DIPL ING filed Critical HEINRICH NIESCHALK DIPL ING
Priority to DEN3327A priority Critical patent/DE920122C/en
Application granted granted Critical
Publication of DE920122C publication Critical patent/DE920122C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

Verfahren zur Herstellung durch Querwellen elastischer Rohre Durch Querwellen elastische Rohre, auch Federrohre oder Faltenbälge genannt, werden zu den verschiedensten Zwecken benötigt. In der Meßtechnik z. B. werden sie als Mittel zum Trennen von zwei verschiedenen Medien, die nicht in Berührung kommen dürfen, verwendet. Sehr oft aber dienen sie als Dehnungskörper, der unter dem Einfluß einer volurnetrischen Änderung einer Füllflüssigkeit seine Länge ändert und diese Längenänderung durch entsprechende Übertragungseinrichtung auf einen Zeiger überträgt, so daß bei ,einer entsprechenden Eichung einer Skala eine Ablesung erfolgen kann. Neben einer gewissen Widerstandsfähigkeit gegenüber wechselnden Belastungen wird von den Federrohren über einen längeren Zeitraum hinweg eine gleichbleibende Elastizität zu verlangen, sein. Diese Forderung kann aber nur erfüllt werden, wenn das zur Herstellung der Federrohre verwendete Material neben seiner Eignung auch eine entsprechende Behandlung während der Bearbeitung erfährt. Die seither angewendeten Herstellungsverfahren entsprechen dieser Forderung nicht ganz, denn das Material wurde dabei sehr einseitig beansprucht. So wird zur Herstellung des Federrohres zunächst einmal ein Röhrchen gezogen und bei diesem Ziehen das Material in Richtung der Längsachse des Rohres beansprucht. Bei der anschließenden Verformung des gezogenen Röhrchens zu einem Federrohr, z. B. durch stufenweises Pressen unter Flüssigkeitsdruck, wirkt sich die durch die erneute Verformung hervorgerufene Materialbeanspruchung wieder in Richtung der Längsachse aus. Durch diese doppelte Beanspruchung des Materials in der gleichen Richtung, die auch durch etwaiges Zwischenglühen nicht restlos auszugleichen ist, wird das Material spröde und verliert an Elastizität.Process for the production of elastic tubes by transverse waves Cross-wave elastic tubes, also called spring tubes or bellows, become required for a wide variety of purposes. In metrology z. B. They are used as a means to separate two different media that must not come into contact, used. But very often they serve as an expansion body, which under the influence of a volurnetric change of a filling liquid changes its length and this change in length transmits to a pointer by appropriate transmission device, so that at , a corresponding calibration of a scale, a reading can be made. In addition to a Some resistance to changing loads is provided by the spring tubes to require constant elasticity over a longer period of time, be. This requirement can only be met if this is used to produce the Spring tubes used material in addition to its suitability also an appropriate treatment learns during processing. The manufacturing processes used since then do not quite meet this requirement, because the material became very one-sided claimed. First of all, a tube is used to manufacture the spring tube pulled and with this pulling the material in the direction of the longitudinal axis of the pipe claimed. During the subsequent deformation of the drawn tube into a Spring tube, e.g. B. by stepwise pressing under liquid pressure, has an effect the material stress caused by the renewed deformation is returned to Direction of the longitudinal axis. This double stress on the material in the same Direction, not even due to any intermediate annealing has to be completely compensated, the material becomes brittle and loses its elasticity.

Gemäß der vorliegenden Erfindung wird, durch Einfügen eines weiteren Arbeitsganges dieser Mißstand beseitigt. Das Röhrchen wird beim Ziehen nicht auf seinen endgültigen Durchmesser ausgezogen, sondern auf einen Durchmesser, der etwas unter dem endgültigen liegt. Nach der allgemein üblichen Glühung im Anschluß an das Ziehen wird das Röhrchen durch Walzen quer zur Längsachse auf seinen endgültigen Durchmesser gebracht. Die durch das Ziehen in Richtung der Längsachse hervorgerufenen Spannungen werden durch das anschließende Querwalzen ausgeglichen. Hiernach kann nach einer erneuten Zwischenglühung des Röhrchens die endgültige Verformung, d. h. das Einpressen der Querwellen, auf einmal oder stufenweise erfolgen.According to the present invention, by inserting another This deficiency is eliminated in the working process. The tube does not open when pulled stripped to its final diameter, but to a diameter that is slightly below the final one. After the usual annealing following the pulling is done by rolling the tube transversely to the longitudinal axis on its final Diameter brought. The ones caused by pulling in the direction of the longitudinal axis Tensions are compensated by the subsequent cross rolling. After that can after a renewed intermediate annealing of the tube the final deformation, d. H. the pressing in of the cross shafts can be carried out all at once or in stages.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung durch Querwellen elastischer Rohre, bei dem gezogene Rohre durch stufenweises Pressen unter Flüssigkeitsdruck in Preßformen quer gewellt werden, dadurch gekennzeichnet, daß Rohre mit kleinerem Ausgangsquerschnitt durch Querwalzen auf den Ausgangsquerschnitt gebracht und dann formgepreßt werden. Angezogene Druckschriften: Deutsche Patentschrift Nr. 5o6 o36.PATENT CLAIM: Process for the production of elastic by transverse waves Pipes, in which the drawn pipes are pressed in stages under liquid pressure are corrugated transversely in compression molds, characterized in that tubes with a smaller Initial cross-section brought to the initial cross-section by cross-rollers and then be compression molded. Referred publications: German patent specification No. 5o6 o36.
DEN3327A 1951-01-05 1951-01-05 Process for the production of elastic tubes by means of transverse waves Expired DE920122C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEN3327A DE920122C (en) 1951-01-05 1951-01-05 Process for the production of elastic tubes by means of transverse waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN3327A DE920122C (en) 1951-01-05 1951-01-05 Process for the production of elastic tubes by means of transverse waves

Publications (1)

Publication Number Publication Date
DE920122C true DE920122C (en) 1954-11-15

Family

ID=7338019

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN3327A Expired DE920122C (en) 1951-01-05 1951-01-05 Process for the production of elastic tubes by means of transverse waves

Country Status (1)

Country Link
DE (1) DE920122C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE506036C (en) * 1928-10-27 1930-09-01 Clifford Mfg Co Process for the production of flexible corrugated pipes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE506036C (en) * 1928-10-27 1930-09-01 Clifford Mfg Co Process for the production of flexible corrugated pipes

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