WO2003014611A1 - Method for production of a metal press fitting element - Google Patents

Method for production of a metal press fitting element Download PDF

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Publication number
WO2003014611A1
WO2003014611A1 PCT/DE2002/002749 DE0202749W WO03014611A1 WO 2003014611 A1 WO2003014611 A1 WO 2003014611A1 DE 0202749 W DE0202749 W DE 0202749W WO 03014611 A1 WO03014611 A1 WO 03014611A1
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WO
WIPO (PCT)
Prior art keywords
press fitting
fitting element
steel
section
bead
Prior art date
Application number
PCT/DE2002/002749
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German (de)
French (fr)
Inventor
Bernd Sedlak
Original Assignee
Mapress Gmbh & Co. Kg
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 Mapress Gmbh & Co. Kg filed Critical Mapress Gmbh & Co. Kg
Priority to EP02754446A priority Critical patent/EP1412667A1/en
Publication of WO2003014611A1 publication Critical patent/WO2003014611A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
    • F16L13/142—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element inserted into the female part before crimping or rolling

Definitions

  • the invention relates to a method for producing a metallic press fitting element according to the preamble of patent claim 1.
  • Press fittings for sanitary and heating made of carbon steel or high-alloy steel as well as copper are known (see brochures: mapress mannesmann press fitting system, supply program for sanitary heating, September 1998 and mapress copper, 03/1999).
  • the core of the press fitting system is a plastically deformable press fitting made from a pipe section, which is preferably designed as a sleeve, elbow, T-piece or reducer.
  • the disadvantage here is that the press fitting due to the high
  • the output pipe is usually a seamless or longitudinally welded pipe, which has tight tolerances and a high surface quality.
  • the output pipe is divided into sections and using several
  • Forming steps e.g. B. pulling, flanging, pressing the desired final cross-sectional shape is generated. Since the starting product is already relatively high quality, the press fitting made from it is also relatively expensive. In addition to the standard types of press fittings, there are also those with threads, such as. B. transition arch or shoulder arch and ceiling angle and transition angle, in which the previously described manufacturing process is not applicable.
  • the object of the invention is to provide a method for producing a press fitting element which is less expensive than the known methods.
  • the groove-shaped annular groove on the inside of the annular bead is poured out and then worked out by machining.
  • This procedure has the advantage that the production of an expensive lost core can be dispensed with, since the inner ring groove, which is difficult to cast, is mechanically worked out.
  • the outer surface does not need to be machined, since the investment casting gives the required surface quality.
  • the machining includes part or all of the inside of the cylindrical portion. That has the
  • the advantage is that, on the one hand, a thicker wall, which is easier to produce in terms of casting technology, can be cast and that the wall thickness required in the strength plane can be produced very precisely by machining. This processing is also limited to the inside and is not required for all dimensions.
  • the press fitting element produced in this way can be part of a one-piece ceiling angle, transition angle, transition curve, transition piece, transition sleeve and the like.
  • the process is also suitable for the production of a T-piece with an outlet with internal or external thread and for the production of a valve body with a press fitting element connected.
  • the proposed method is applicable to all metals, especially steel.
  • the steel is preferably a low-alloy carbon steel or a high-alloy stainless steel.
  • the process according to the invention is explained in more detail using three examples. Show it:
  • FIG. 1 in cross section a ceiling bracket
  • FIG. 2 in cross section a transition piece with an external thread
  • Figure 3 in cross section a transition arch with an external thread.
  • a conventional ceiling angle 1 is shown in cross section in FIG. This consists of a threaded section 2 with an internal thread 3.
  • a foot element 4 is arranged at the end of the threaded section 2.
  • a press fitting element 5 is connected to the threaded section 2 at a right angle. This has an annular bead 6 on the end face, into which a sealing element, not shown here, can be inserted.
  • This is followed by a cylindrically shaped section 8 with an oblique transition 7. At the end of the extension, the cylindrically shaped section 8 has a shoulder 9 which forms a stop for the conduit not to be inserted here.
  • the proposal can also be used to adjust the wall thickness 11 in the cylindrical section 8 in accordance with the deformation.
  • the wall thickness 1 1 must on the one hand be dimensioned sufficiently to form the strength level and on the other hand must not be too thick, since the pressing forces then increase sharply. In terms of casting technology, it is easier to cast the wall thickness in the plus tolerance and then to set the optimum wall thickness in a targeted manner by simple mechanical processing.
  • FIG. 2 shows a transition piece 12 as a second example, the same reference numerals being used for the same parts.
  • the transition piece 12 consists of a straight threaded section 13 with an external thread 14. This is followed by a hexagon 15.
  • a press fitting element 5 'with an annular bead 6 and a cylindrical section 8 is integrally connected to the threaded section 13.
  • a second cylindrical section 8' adjoins the insertion side facing the annular bead 6.
  • the pouring technique of the cast annular bead area 6 ' is carried out in the same way as previously described (upper left
  • the mechanical processing for shaping the annular bead 6 then takes place.
  • the annular bead 6 can be designed symmetrically or asymmetrically.
  • the cast annular bead region 6 ' has a slope inclined towards the insertion side.
  • a transition curve 16 is shown in FIG. It also consists of a threaded section 17 with an external thread 18. This is followed by an arch element 19, which then merges into a press fitting element 5 ".
  • the press fitting element 5" shown here is provided with two annular beads 6, 6.1.
  • the procedure in casting technology is the same as described above, with the only difference that two cast annular bead areas 6 ', 6.1' have to be machined.

Abstract

The invention relates to a method for production of a metal press fitting element, comprising at least one section embodied in the form of a bead for housing a sealing element and a cylindrically-embodied section connected thereto, facing towards and/or away from the insertion side of a supply line to be connected to the press fitting element, whereby the press fitting element is produced by precision casting. The internal grooved annular groove (10) of the annular bead (6, 6.1) is thus cast and finally worked out by machine cutting.

Description

Verfahren zur Herstellung eines metallischen PressfittingelementesProcess for producing a metallic press fitting element
Beschreibungdescription
Die Erfindung betrifft ein Verfahren zur Herstellung eines metallischen Pressfittingelementes gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a method for producing a metallic press fitting element according to the preamble of patent claim 1.
Pressfittings für Sanitär und Heizung aus Kohlenstoffstahl oder hochlegiertem Stahl sowie aus Kupfer sind bekannt (siehe Prospekte: mapress mannesmann pressfitting-system, Lieferprogramm Sanitär Heizung, September 1998 sowie mapress Kupfer, 03/1999). Kernstück des Pressfitting-Systems ist ein aus einem Rohrabschnitt hergestellter plastisch verformbarer Pressfitting, der vorzugsweise als Muffe, Bogen, T-Stück oder Reduzierstück ausgebildet ist. Nachteilig dabei ist, dass der Pressfitting wegen der hohenPress fittings for sanitary and heating made of carbon steel or high-alloy steel as well as copper are known (see brochures: mapress mannesmann press fitting system, supply program for sanitary heating, September 1998 and mapress copper, 03/1999). The core of the press fitting system is a plastically deformable press fitting made from a pipe section, which is preferably designed as a sleeve, elbow, T-piece or reducer. The disadvantage here is that the press fitting due to the high
Anforderung bezüglich der Oberfläche und der Abmessungstoleranzen aus einem Abschnitt eines speziell hergestellten Rohres unter Anwendung mehrerer Umformschritte gewonnen wird. Das Ausgangsrohr ist üblicherweise ein nahtloses oder längsnahtgeschweißtes Rohr, das enge Toleranzen und eine hohe Oberflächengüte aufweist. Das Ausgangsrohr wird in Abschnitte zerteilt und durch Anwendung mehrererRequirement with regard to the surface and the dimensional tolerances is obtained from a section of a specially manufactured pipe using several forming steps. The output pipe is usually a seamless or longitudinally welded pipe, which has tight tolerances and a high surface quality. The output pipe is divided into sections and using several
Umformschritte, z. B. Einziehen, Bördeln, Drücken wird die gewünschte, endgültige Querschnittsform erzeugt. Da das Ausgangsprodukt schon relativ hochwertig ist, ist auch der daraus hergestellte Pressfitting relativ teuer. Darüber hinaus gibt es neben den Standardtypen von Pressfittings auch solche mit Gewinde, wie z. B. Übergangsbogen oder Ansatzbogen sowie Deckenwinkel und Übergangswinkel, bei denen das zuvor geschilderte Herstellverfahren nicht anwendbar ist.Forming steps, e.g. B. pulling, flanging, pressing the desired final cross-sectional shape is generated. Since the starting product is already relatively high quality, the press fitting made from it is also relatively expensive. In addition to the standard types of press fittings, there are also those with threads, such as. B. transition arch or shoulder arch and ceiling angle and transition angle, in which the previously described manufacturing process is not applicable.
In der Vergangenheit hat es einige Vorschläge gegeben, das zuletzt geschilderte Problem zu überwinden. Beispielsweise ist in der DE 10029479 A1 vorgeschlagen worden, als Ausgangsmaterial einen Voll- oder Hohlstab zu erzeugen und diesen spanabhebend zu bearbeiten. Wahlweise kann der Voll- oder Hohlstab durch Stranggießen, Strangpressen oder Schmieden erzeugt werden. Nach einem weiteren Vorschlag (DE 29504502 U1) wird der Pressfitting einstückig aus Temperguss hergestellt. Nachteilig dabei ist, dass der Werkstoff Temperguss aus Korrosionsschutzgründen nicht in Rohrsysteme aus Edelstahl eingesetzt werden kann. Nach einem weiteren Vorschlag (DE 19901990 A1) wird der Pressfitting einstückig aus Edelstahlfeinguss hergestellt. Nachteilig dabei ist, dass zum Gießen der Auswölbung zur Aufnahme eines Dichtelementes ein aufwendig herzustellender verlorener Kern eingesetzt werden muss. Außerdem ist es schwierig, die sich bei einigen Abmessungen ergebende dünne Wand im Verpressbereich gießtechnisch fehlerfrei zu realisieren.In the past, there have been some suggestions to overcome the last problem outlined. For example, it has been proposed in DE 10029479 A1 to produce a solid or hollow rod as the starting material and to machine it by machining. The solid or hollow rod can be produced by continuous casting, extrusion or forging. According to a further proposal (DE 29504502 U1), the press fitting is manufactured in one piece from malleable cast iron. The disadvantage here is that malleable cast iron cannot be used in stainless steel pipe systems for reasons of corrosion protection. According to a further proposal (DE 19901990 A1), the press fitting is made in one piece from stainless steel investment casting. The disadvantage here is that a lost core, which is expensive to manufacture, has to be used to cast the bulge to accommodate a sealing element. In addition, it is difficult to implement the thin wall in the pressing area, which results in some dimensions, without casting errors.
Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung eines Pressfittingelementes anzugeben, das kostengünstiger ist als die bekannten Verfahren.The object of the invention is to provide a method for producing a press fitting element which is less expensive than the known methods.
Nach der Lehre der Erfindung wird die innenseitig liegende nutenförmige Ringnut der Ringwulst ausgegossen und anschließend durch eine spanabhebende Bearbeitung ausgearbeitet. Diese Verfahrensweise hat den Vorteil, dass auf die Herstellung eines teuren verlorenen Kerns verzichtet werden kann, da die schwierig zu gießende innen liegende Ringnut mechanisch ausgearbeitet wird. Die Außenoberfläche braucht nicht mechanisch bearbeitet zu werden, da durch den Feinguss die erforderliche Oberflächenqualität gegeben ist.According to the teaching of the invention, the groove-shaped annular groove on the inside of the annular bead is poured out and then worked out by machining. This procedure has the advantage that the production of an expensive lost core can be dispensed with, since the inner ring groove, which is difficult to cast, is mechanically worked out. The outer surface does not need to be machined, since the investment casting gives the required surface quality.
Nach einem weiteren Merkmal der Erfindung schließt die spanabhebende Bearbeitung teilweise oder ganz die Innenseite des zylindrischen Abschnittes mit ein. Das hat denAccording to a further feature of the invention, the machining includes part or all of the inside of the cylindrical portion. That has the
Vorteil, dass zum einen eine gießtechnisch leichter herzustellende dickere Wand gegossen werden kann und durch die spanabhebende Bearbeitung sehr genau die in der Festigkeitsebene erforderliche Wanddicke erzeugt werden kann. Auch diese Bearbeitung ist nur auf die Innenseite beschränkt und ist auch nicht für alle Abmessungen erforderlich.The advantage is that, on the one hand, a thicker wall, which is easier to produce in terms of casting technology, can be cast and that the wall thickness required in the strength plane can be produced very precisely by machining. This processing is also limited to the inside and is not required for all dimensions.
Das so hergestellte Pressfittingelement kann Teil eines einstückig hergestellten Deckenwinkels, Übergangswinkels, Ubergangsbogen, Übergangsstück, Übergangsmuffe und dgl. sein. Das Verfahren bietet sich auch zur Herstellung eines T-Stückes mit Abgang mit Innen- oder Außengewinde an sowie zur Herstellung eines Armaturengehäuses mit angeschlossenem Pressfittingelement.The press fitting element produced in this way can be part of a one-piece ceiling angle, transition angle, transition curve, transition piece, transition sleeve and the like. The process is also suitable for the production of a T-piece with an outlet with internal or external thread and for the production of a valve body with a press fitting element connected.
Das vorgeschlagene Verfahren ist anwendbar für alle Metalle, insbesondere für Stahl. Vorzugsweise ist der Stahl ein niedriglegierter C-Stahl oder ein hochlegierter Edelstahl. Das erfindungsgemäße Verfahren wird anhand dreier Beispiele näher erläutert. Es zeigen:The proposed method is applicable to all metals, especially steel. The steel is preferably a low-alloy carbon steel or a high-alloy stainless steel. The process according to the invention is explained in more detail using three examples. Show it:
Figur 1 im Querschnitt einen Deckenwinkel, Figur 2 im Querschnitt ein Übergangsstück mit Außengewinde,1 in cross section a ceiling bracket, FIG. 2 in cross section a transition piece with an external thread,
Figur 3 im Querschnitt einen Ubergangsbogen mit Außengewinde.Figure 3 in cross section a transition arch with an external thread.
In Figur 1 ist in einem Querschnitt ein üblicher Deckenwinkel 1 dargestellt. Dieser besteht aus einem Gewindeabschnitt 2 mit einem Innengewinde 3. Um den Deckenwinkel 1 be- festigen zu können, ist am Ende des Gewindeabschnittes 2 ein hier nicht näher dargestelltes Fußelement 4 angeordnet. Im rechten Winkel zum Gewindeabschnitt 2 ist mit diesem ein Pressfittingelement 5 verbunden. Dieses weist an der Stirnseite eine Ringwulst 6 auf, in die ein hier nicht dargestelltes Dichtelement einlegbar ist. Daran schließt sich mit einem schrägen Übergang 7 ein zylindrisch ausgebildeter Abschnitt 8 an. Am Ende der Erstreckung weist der zylindrisch ausgebildete Abschnitt 8 einen Absatz 9 auf, der einen Anschlag für das hier nicht dargestellte einzuschiebende Leitungsrohr bildet.A conventional ceiling angle 1 is shown in cross section in FIG. This consists of a threaded section 2 with an internal thread 3. In order to be able to fasten the ceiling bracket 1, a foot element 4, not shown here, is arranged at the end of the threaded section 2. A press fitting element 5 is connected to the threaded section 2 at a right angle. This has an annular bead 6 on the end face, into which a sealing element, not shown here, can be inserted. This is followed by a cylindrically shaped section 8 with an oblique transition 7. At the end of the extension, the cylindrically shaped section 8 has a shoulder 9 which forms a stop for the conduit not to be inserted here.
Um einen solchen Deckenwinkel 1 einstückig als Feingussteil herzustellen, müssen be- sondere verlorene Kerne hergestellt werden, insbesondere um die innen liegende ringförmige Nut 7 der Ringwulst 6 gießtechnisch zu formen. Da dieser Kern wegen der Hinter- schneidung nicht gezogen werden kann, muss er in einem aufwendigen Verfahren wieder entfernt werden. In order to manufacture such a ceiling bracket 1 in one piece as an investment casting, special lost cores have to be produced, in particular in order to mold the inside annular groove 7 of the annular bead 6. Since this core cannot be pulled due to the undercut, it has to be removed again in a complex process.
Nach der Lehre der Erfindung wird vorgeschlagen, die schwierige Stelle der Ringwulst 6' voll auszugießen, wie auf der rechten Teilhälfte des Schnittes zu erkennen ist. Der übrige Kern kann als Stecker ohne Schwierigkeiten gezogen werden und die erforderliche Herstellung der Ringwulst 6 erfolgt anschließend durch eine mechanische Bearbeitung des gegossenen Ringwulstbereiches 6'. Der Vorschlag kann auch dazu benutzt werden, die Wanddicke 11 im zylindrischen Abschnitt 8 verformungsgerecht einzustellen. Die Wanddicke 1 1 muss zur Bildung der Festigkeitsebene einerseits ausreichend bemessen und darf zum anderen aber nicht zu dick ausfallen, da die Presskräfte dann stark ansteigen. Gießtechnisch ist es einfacher, die Wanddicke in der Plustoleranz zu gießen und dann gezielt durch eine einfache mechanische Bearbeitung die optimale Wanddicke einzustellen. Da die Außenkontur unverändert bleibt, beschränkt sich die mechanische Bearbeitung auf die Innenseite. Die mechanische Bearbeitung des zylindrisch ausgebildeten Abschnittes 8 ist auch nicht für alle Abmessungen erforderlich, da bei einigen Abmessungen die gewünschte Wanddicke gießtechnisch problemlos herzustellen ist. Die Schwierigkeiten treten insbesondere bei dünner Wand auf, da hier die Gefahr vonAccording to the teaching of the invention, it is proposed to fully pour out the difficult point of the annular bead 6 ', as can be seen on the right half of the section. The rest of the core can be pulled as a plug without difficulty and the required production of the ring bead 6 is then carried out by mechanical processing of the cast ring bead area 6 '. The proposal can also be used to adjust the wall thickness 11 in the cylindrical section 8 in accordance with the deformation. The wall thickness 1 1 must on the one hand be dimensioned sufficiently to form the strength level and on the other hand must not be too thick, since the pressing forces then increase sharply. In terms of casting technology, it is easier to cast the wall thickness in the plus tolerance and then to set the optimum wall thickness in a targeted manner by simple mechanical processing. Since the outer contour remains unchanged, the mechanical processing is limited to the inside. The mechanical processing of the cylindrical section 8 is also not necessary for all dimensions, since with some dimensions the desired wall thickness can be produced without problems using casting technology. The difficulties arise particularly in the case of a thin wall, since there is a risk of
Gießfehlern besonders groß ist.Pouring errors is particularly large.
In Figur 2 ist als zweites Beispiel ein Übergangsstück 12 dargestellt, wobei für gleiche Teile gleiche Bezugszeichen verwendet worden sind. Das Übergangsstück 12 besteht aus einem geraden Gewindeabschnitt 13 mit einem Außengewinde 14. Daran schließt sich ein Sechskant 15 an. Integral mit dem Gewindeabschnitt 13 verbunden ist ein Pressfittingelement 5' mit Ringwulst 6 und zylindrischem Abschnitt 8. Im Unterschied zur Ausbildung gemäß Figur 1 schließt sich der Einschubseite zugewandt an die Ringwulst 6 ein zweiter zylindrisch ausgebildeter Abschnitt 8' an. Die Ausgießtechnik des gegossenen Ringwulstbereiches 6' erfolgt in der gleichen Weise wie zuvor beschrieben (oberes linkesFIG. 2 shows a transition piece 12 as a second example, the same reference numerals being used for the same parts. The transition piece 12 consists of a straight threaded section 13 with an external thread 14. This is followed by a hexagon 15. A press fitting element 5 'with an annular bead 6 and a cylindrical section 8 is integrally connected to the threaded section 13. In contrast to the design according to FIG. 1, a second cylindrical section 8' adjoins the insertion side facing the annular bead 6. The pouring technique of the cast annular bead area 6 'is carried out in the same way as previously described (upper left
Teilbild). Danach erfolgt die mechanische Bearbeitung zur Ausformung der Ringwulst 6. In dieser Figur ist dargestellt, dass der Ringwulst 6 symmetrisch oder asymmetrisch ausgebildet sein kann. Dazu weist der gegossene Ringwulstbereich 6' eine zur Einschubseite geneigte Schräge auf. An einem dritten Beispiel ist in Figur 3 ein Ubergangsbogen 16 dargestellt. Er besteht ebenfalls aus einem Gewindeabschnitt 17 mit einem Außengewinde 18. Daran schließt sich ein Bogenelement 19 an, das dann übergeht in ein Pressfittingelement 5". Im Unterschied zu Figur 2 ist das hier dargestellte Pressfittingelement 5" mit zwei Ringwülsten 6, 6.1 versehen. Die Verfahrensweise in der Gießtechnik ist die gleiche wie zuvor beschrieben, nur mit dem Unterschied, dass zwei gegossene Ringwulstbereiche 6', 6.1 ' mechanisch bearbeitet werden müssen. Field). The mechanical processing for shaping the annular bead 6 then takes place. This figure shows that the annular bead 6 can be designed symmetrically or asymmetrically. For this purpose, the cast annular bead region 6 'has a slope inclined towards the insertion side. In a third example, a transition curve 16 is shown in FIG. It also consists of a threaded section 17 with an external thread 18. This is followed by an arch element 19, which then merges into a press fitting element 5 ". In contrast to FIG. 2, the press fitting element 5" shown here is provided with two annular beads 6, 6.1. The procedure in casting technology is the same as described above, with the only difference that two cast annular bead areas 6 ', 6.1' have to be machined.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Figure imgf000008_0001
Figure imgf000008_0001

Claims

Patentansprüche claims
1. Verfahren zur Herstellung eines metallischen Pressfittingelementes, mit mindestens einem wulstartig ausgebildeten ein Dichtelement aufnehmenden Abschnitt und einem daran anschließenden zylindrisch ausgebildeten Abschnitt, der der Einschubseite eines mit dem Pressfittingelement zu verbindenden Leitungsrohres zu- und/oder abgewandt ist, wobei das Pressfittingelement aus Feinguss erzeugt wird, dadurch gekennzeichnet, dass die innenseitig liegende nutenförmige Ringnut (10) der Ringwulst (6, 6.1) aus- gegossen und anschließend durch spanabhebende Bearbeitung ausgearbeitet wird.1. A method for producing a metallic press fitting element with at least one bead-shaped section receiving a sealing element and an adjoining cylindrical section which faces the insertion side of a conduit pipe to be connected to the press fitting element, the press fitting element being produced from investment casting is characterized in that the groove-shaped annular groove (10) on the inside of the annular bead (6, 6.1) is poured out and then machined.
2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass die spanabhebende Bearbeitung teilweise oder ganz auch die Innenseite des zylindrischen Abschnittes (8, 8') mit einschließt.2. The method according to claim 1, characterized in that the machining partially or completely includes the inside of the cylindrical portion (8, 8 ').
3. Verfahren nach Anspruch 1 und 2 dadurch gekennzeichnet, dass als Werkstoff für den Feinguss ein hochlegierter Stahl verwendet wird.3. The method according to claim 1 and 2, characterized in that a high-alloy steel is used as the material for the investment casting.
4. Verfahren nach Anspruch 3 dadurch gekennzeichnet, dass der Stahl ein niedriglegierter C-Stahl ist.4. The method according to claim 3, characterized in that the steel is a low-alloy carbon steel.
5. Verfahren nach Anspruch 4 dadurch gekennzeichnet, dass der Stahl ein hochlegierter Edelstahl ist. 5. The method according to claim 4, characterized in that the steel is a high-alloy stainless steel.
PCT/DE2002/002749 2001-08-03 2002-07-23 Method for production of a metal press fitting element WO2003014611A1 (en)

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DE2001138442 DE10138442C1 (en) 2001-08-03 2001-08-03 Production of a metal press-fitting element used in sanitary and heating devices comprises precision casting an inner annular groove of an annular ring followed by metal cutting processing
DE10138442.4 2001-08-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004016391U1 (en) * 2004-10-21 2006-03-02 Interforge Klee Gmbh Muff coupling for fitting valve has circumferential grooves at other end of socket for accommodating sealing element e.g. o-ring whereby distance between two grooves is such that connecting pipe is sealed by both sealing elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005012908B3 (en) * 2005-03-14 2006-09-07 Geberit Technik Ag Metal fitting body making process for pipe joint involves creating significantly increased wall thickness in connecting sector during casting

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343395A2 (en) * 1988-05-25 1989-11-29 R. Nussbaum AG Pressfitting, tap and method of manufacture
DE29504502U1 (en) * 1995-03-20 1995-05-11 Ruhnke Michael Pressable fittings made of malleable cast iron
DE19901990A1 (en) * 1999-01-20 2000-08-10 Interforge Klee Gmbh Press fitting for joining pipes consists of one-piece casting made of high grade steel with one or more integrally cast sections with screw thread
DE10029479A1 (en) * 1999-07-22 2001-02-01 Mapress Gmbh & Co Kg Process for producing a metallic press fitting element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343395A2 (en) * 1988-05-25 1989-11-29 R. Nussbaum AG Pressfitting, tap and method of manufacture
DE29504502U1 (en) * 1995-03-20 1995-05-11 Ruhnke Michael Pressable fittings made of malleable cast iron
DE19901990A1 (en) * 1999-01-20 2000-08-10 Interforge Klee Gmbh Press fitting for joining pipes consists of one-piece casting made of high grade steel with one or more integrally cast sections with screw thread
DE10029479A1 (en) * 1999-07-22 2001-02-01 Mapress Gmbh & Co Kg Process for producing a metallic press fitting element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004016391U1 (en) * 2004-10-21 2006-03-02 Interforge Klee Gmbh Muff coupling for fitting valve has circumferential grooves at other end of socket for accommodating sealing element e.g. o-ring whereby distance between two grooves is such that connecting pipe is sealed by both sealing elements

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EP1412667A1 (en) 2004-04-28
DE10138442C1 (en) 2003-01-02

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