WO2013174456A1 - Method for producing piston rings - Google Patents

Method for producing piston rings Download PDF

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Publication number
WO2013174456A1
WO2013174456A1 PCT/EP2012/073590 EP2012073590W WO2013174456A1 WO 2013174456 A1 WO2013174456 A1 WO 2013174456A1 EP 2012073590 W EP2012073590 W EP 2012073590W WO 2013174456 A1 WO2013174456 A1 WO 2013174456A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston rings
produced
round rod
ring segments
wire
Prior art date
Application number
PCT/EP2012/073590
Other languages
German (de)
French (fr)
Inventor
Thomas Dickmann
Gero Sinha
Holger Weiss
Claus SPIEGELHAUER
Original Assignee
Peak-Werkstoff 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
Application filed by Peak-Werkstoff Gmbh filed Critical Peak-Werkstoff Gmbh
Publication of WO2013174456A1 publication Critical patent/WO2013174456A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/02—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of piston rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/06—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%

Definitions

  • the invention relates to a method for the production of piston rings.
  • Piston rings are used as sealing and ⁇ labstreichimplantation on pistons of an internal combustion engine or a reciprocating compressor.
  • Known manufacturing processes for the production of piston rings are the single casting or the tapping off of individual rings of cans.
  • the shaping is usually done by double-forming or by an external and internal machining of the blank.
  • piston rings made of steel is usually made of a profiled wire.
  • the wire is first wound on a tube to obtain the piston ring shape. Subsequently, the butt hole is cut out and the wound spirals are separated to obtain ring segments.
  • the invention has for its object to provide a method by which piston rings can be produced with improved properties, in particular with reduced wear.
  • thermo-mechanical forming for example, forging into slabs.
  • the slabs are then formed into round bars by rolling.
  • the piston rings can be made by two different methods:
  • the semi-finished round bar is first pulled to a wire of the required diameter.
  • the wire is then wound on a tube or rod to obtain the piston ring shape. Thereafter, the drawn spirals are separated so that ring segments are obtained. If a butt hole is inserted in the rings, it will do so while the wire is wound on the tube or rod.
  • the piston rings are preferably produced from a steel alloy by the methods described above.
  • the steel alloy used, from which the starting material is produced by spray compacting preferably contains a Cr content of 8 to 17% by weight and a C content of 0.3 to 0.8% by weight.
  • the spray compaction according to the invention in the first stage achieves finer microstructures and lower precipitations of unfavorable phases.
  • piston rings can be produced with less wear, since the abrasiveness for the friction partner is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to a method for producing piston rings, wherein, in a first step, a blank is produced by spray forming of metal and, subsequently, the blank is transformed into a round rod by thermomechanical forming, from which the piston rings are produced.

Description

B E S C H R E I B U N G  DESCRIPTION
Verfahren zur Herstellung von Kolbenringen Die Erfindung betrifft ein Verfahren zur Herstellung von Kolbenringen. Kolbenringe werden als Dicht- und Ölabstreichelemente auf Kolben eines Verbrennungsmotors oder eines Kolbenverdichters eingesetzt. Bekannte Fertigungsverfahren zur Herstellung von Kolbenringen sind das Einzelgießen oder das Abstechen einzelner Ringe von Büchsen. Die Formgebung geschieht in der Regel durch Doppelformdrehen oder durch eine Außen- und Innenbearbeitung des Rohlings. The invention relates to a method for the production of piston rings. Piston rings are used as sealing and Ölabstreichelemente on pistons of an internal combustion engine or a reciprocating compressor. Known manufacturing processes for the production of piston rings are the single casting or the tapping off of individual rings of cans. The shaping is usually done by double-forming or by an external and internal machining of the blank.
Die Herstellung von Kolbenringen aus Stahl erfolgt üblicherweise aus einem profilierten Draht. Der Draht wird zunächst auf ein Rohr gewickelt, um die Kolbenringform zu erhalten. Anschließend wird die Stoßöffnung herausgetrennt, und die aufgezogenen Spiralen werden voneinander getrennt, um Ringsegmente zu erhalten. The production of piston rings made of steel is usually made of a profiled wire. The wire is first wound on a tube to obtain the piston ring shape. Subsequently, the butt hole is cut out and the wound spirals are separated to obtain ring segments.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bereitzustellen, mit dem sich Kolbenringe mit verbesserten Eigenschaften, insbesondere mit verringertem Verschleiß, herstellen lassen. The invention has for its object to provide a method by which piston rings can be produced with improved properties, in particular with reduced wear.
Diese Aufgabe wird dadurch gelöst, dass in einem ersten Schritt durch Sprühkompaktieren von Metall ein Rohling hergestellt wird, der anschließend durch thermomechanisches Umformen zu einer Rundstange umgeformt wird, aus der die Kolbenringe hergestellt werden. Das durch Sprühkompaktieren hergestellte Ringmaterial wird zunächst einer thermomechanischen Umformung unterzogen, beispielsweise ein Freiformschmieden zu Brammen. Die Brammen werden anschließend durch Walzen zu Rundstangen umgeformt. This object is achieved in that in a first step by spray compacting of metal, a blank is produced, which is then converted by thermo-mechanical forming into a round rod, from which the piston rings are produced. The ring material produced by spray compacting is first subjected to thermo-mechanical forming, for example, forging into slabs. The slabs are then formed into round bars by rolling.
Aus den Rundstangen können die Kolbenringe durch zwei verschiedene Verfahren hergestellt werden: From the round bars, the piston rings can be made by two different methods:
1. 1.
Zunächst werden aus den Rundstangen als Vormateria! durch Pilgern oder Strangpressen dünnwandige Rohre hergestellt. Von den dünnwandigen Rohren werden anschließend Ringsegmente abgesägt oder abgestochen und final bearbeitet. Die finale Bearbeitung eines Kolbenrings besteht bekannterweise im Heraustrennen der Stoßöffnung und der notwendigen Formgebung mittels einer entsprechenden Wärmebehandlung. Erforderlichenfalls werden die Ringe außen und / oder innen abgedreht oder geschliffen. First, from the round bars as Vormateria! produced by pilgrims or extrusion thin-walled tubes. From the thin-walled tubes, ring segments are subsequently sawn or tapped and finally machined. The final machining of a piston ring is known to be in the separation of the butt opening and the necessary shaping by means of a corresponding heat treatment. If necessary, the rings are turned or sanded outside and / or inside.
2. Second
Nach einem anderen Herstellungsverfahren wird das Halbzeug Rundstange zunächst zu einem Draht mit dem erforderlichen Durchmesser gezogen. Der Draht wird anschließend auf ein Rohr oder eine Stange gewickelt, um die Kolbenringform zu erhalten. Danach werden die aufgezogenen Spiralen getrennt, so dass Ringsegmente erhalten werden. Falls eine Stoßöffnung in die Ringe eingebracht wird, so erfolgt dies, während der Draht auf dem Rohr oder der Stange aufgewickelt ist. According to another manufacturing method, the semi-finished round bar is first pulled to a wire of the required diameter. The wire is then wound on a tube or rod to obtain the piston ring shape. Thereafter, the drawn spirals are separated so that ring segments are obtained. If a butt hole is inserted in the rings, it will do so while the wire is wound on the tube or rod.
Bevorzugt werden die Kolbenringe nach den vorstehend beschriebenen Verfahren aus einer Stahliegierung hergestellt. Die verwendete Stahllegierung, aus der durch Sprühkompaktierung das Vormaterial hergestellt wird, enthält bevorzugt einen Cr-Gehalt von 8 bis 17 Gew.-% und einen C-Gehalt von 0,3 bis 0,8 Gew.-%. Durch das erfindungsgemäße Sprühkompaktieren in der ersten Stufe sind feinere Gefüge und geringere Ausscheidungen ungünstiger Phasen erreichbar. So lassen sich Kolbenringe mit geringerem Verschleiß herstellen, da die Abrasivität für den Reibungspartner verringert wird. The piston rings are preferably produced from a steel alloy by the methods described above. The steel alloy used, from which the starting material is produced by spray compacting, preferably contains a Cr content of 8 to 17% by weight and a C content of 0.3 to 0.8% by weight. The spray compaction according to the invention in the first stage achieves finer microstructures and lower precipitations of unfavorable phases. Thus, piston rings can be produced with less wear, since the abrasiveness for the friction partner is reduced.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. 1.
Verfahren zur Herstellung von Kolbenringen, dadurch gekennzeichnet, dass in einem ersten Schritt durch Sprühkompaktieren von Metall ein Rohling hergestellt wird, der anschließend durch thermomechanisches Umformen zu einer Rundstange umgeformt wird, aus der die Kolbenringe hergestellt werden. A method for producing piston rings, characterized in that in a first step by spray compacting of metal, a blank is produced, which is then converted by thermo-mechanical forming to a round rod, from which the piston rings are produced.
2. Second
Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass aus der Rundstange durch Pilgern oder Strangpressen ein dünnwandiges Rohr hergestellt wird, von dem anschließend Ringsegmente abgesägt oder abgestochen werden.  A method according to claim 1, characterized in that from the round rod by pilgrims or extrusion a thin-walled tube is produced, are sawed or tapped from the then ring segments.
3. Third
Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass nach dem Absägen oder Abstechen der Ringsegmente eine finale Bearbeitung der Kolbenringe durchgeführt wird. A method according to claim 2, characterized in that after the sawing or parting of the ring segments a final processing of the piston rings is performed.
4. 4th
Verfahren nach Anspruch 1 gekennzeichnet durch folgende Verfahrensschritte:  Method according to claim 1, characterized by the following method steps:
Zunächst wird aus der Rundstange ein Draht gezogen, First, a wire is pulled out of the round rod,
der Draht wird anschließend auf ein Rohr oder eine Stange gewickelt, um die Kolbenringform zu erhalten,  the wire is then wound onto a tube or rod to obtain the piston ring shape,
danach werden die aufgezogenen Spiralen getrennt, um Ringsegmente zu erhalten.  Thereafter, the drawn spirals are separated to obtain ring segments.
5. 5th
Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Vormaterial durch Sprühkompaktieren aus einer Stahllegierung hergestellt wird, die einen Cr-Gehalt von 8 bis 17 Gew.-% und einen C- Gehalt von 0,3 bis 0,8 Gew.-% aufweist.  Method according to one of claims 1 to 4, characterized in that the starting material is prepared by spray-compacting a steel alloy having a Cr content of 8 to 17 wt .-% and a C content of 0.3 to 0.8 wt .-% having.
PCT/EP2012/073590 2012-05-25 2012-11-26 Method for producing piston rings WO2013174456A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012208860.1 2012-05-25
DE102012208860A DE102012208860A1 (en) 2012-05-25 2012-05-25 Method for producing piston rings

Publications (1)

Publication Number Publication Date
WO2013174456A1 true WO2013174456A1 (en) 2013-11-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076866A (en) * 1989-02-17 1991-12-31 Honda Giken Kogyo Kabushiki Kaisha Heat resistant slide member for internal combustion engine
DE19532253A1 (en) * 1995-09-01 1997-03-06 Peak Werkstoff Gmbh Process for the production of thin tubes (II)
US20080053396A1 (en) * 2006-08-31 2008-03-06 Nippon Piston Ring Co., Ltd. Combination of a cylinder liner and a piston ring
US20110311390A1 (en) * 2009-02-26 2011-12-22 Laszlo Pelsoeczy Steel material composition for producing piston rings and cylinder sleeves

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328619C2 (en) * 1993-08-26 1995-08-10 Peak Werkstoff Gmbh Partially reinforced cast aluminum component and process for its production
DE19523484C2 (en) * 1995-06-28 2002-11-14 Daimler Chrysler Ag Method for producing a cylinder liner from a hypereutectic aluminum / silicon alloy for casting into a crankcase of a reciprocating piston machine and cylinder liner produced thereafter
DE19532244C2 (en) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Process for the production of thin-walled tubes (I)
DE19851424A1 (en) * 1998-11-07 2000-05-11 Nagel Masch Werkzeug Piston ring used for I.C. engines consists of a multiphase material in the region of the ring outer surface containing finely divided hard material particles in a matrix
AT4434U1 (en) * 2000-07-13 2001-07-25 Avl List Gmbh RIFLE BUSHING FOR A PISTON, AND METHOD FOR THE PRODUCTION THEREOF
DE102005004486B4 (en) * 2005-01-31 2011-05-05 Peak Werkstoff Gmbh Bushing for pouring into an engine block

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076866A (en) * 1989-02-17 1991-12-31 Honda Giken Kogyo Kabushiki Kaisha Heat resistant slide member for internal combustion engine
DE19532253A1 (en) * 1995-09-01 1997-03-06 Peak Werkstoff Gmbh Process for the production of thin tubes (II)
US20080053396A1 (en) * 2006-08-31 2008-03-06 Nippon Piston Ring Co., Ltd. Combination of a cylinder liner and a piston ring
US20110311390A1 (en) * 2009-02-26 2011-12-22 Laszlo Pelsoeczy Steel material composition for producing piston rings and cylinder sleeves

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Publication number Publication date
DE102012208860A1 (en) 2013-11-28

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