EP1062441A1 - Procede pour la fabrication d'une chemise de cylindre metallique - Google Patents

Procede pour la fabrication d'une chemise de cylindre metallique

Info

Publication number
EP1062441A1
EP1062441A1 EP99913188A EP99913188A EP1062441A1 EP 1062441 A1 EP1062441 A1 EP 1062441A1 EP 99913188 A EP99913188 A EP 99913188A EP 99913188 A EP99913188 A EP 99913188A EP 1062441 A1 EP1062441 A1 EP 1062441A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
spinning
cylinder liner
rolling
pressure
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Withdrawn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
EP99913188A
Other languages
German (de)
English (en)
Inventor
Bernd Stein
Adam Zaboklicki
Wilhelm Zimmermann
Jürgen Zimmermann
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.)
Dynaform GmbH
Original Assignee
Dynamit Nobel AG
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
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 Dynamit Nobel AG, Dynamit Nobel GmbH Explosivstoff und Systemtechnik filed Critical Dynamit Nobel AG
Publication of EP1062441A1 publication Critical patent/EP1062441A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/004—Cylinder liners
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
    • F16J10/02—Cylinders designed to receive moving pistons or plungers
    • F16J10/04—Running faces; Liners

Definitions

  • the invention relates to a method for producing a metallic cylinder liner for use in the engine block of an internal combustion engine, the inner surface of the cylinder liner having a surface structure.
  • cylinder liners In engine construction, cylinder liners (“wet” or “dry”) are used to line cylinders, which are inserted into the engine blocks, which are usually made of cast materials.
  • the liners are made of wear-resistant materials and have a specially designed topography of the inner surface for better piston guidance and piston lubrication. These inner surfaces are conventionally prepared for use by complex mechanical processing.
  • the invention is based on the object of specifying a method for producing a metallic cylinder liner for use in the engine block of an internal combustion engine, with which the cylinder liners can be produced in one operation and thus more cost-effectively.
  • the quality of these cylinder liners should be at least comparable to the quality of the cylinder liners manufactured according to the prior art.
  • this object is achieved in that the cylinder liner with the surface structure is produced in one operation using the pressure rolling technology known per se.
  • the pressure rolling technique is described by way of example in DE 24 20 014 A1 or WO 96/200 50.
  • the pressure rolling is also referred to as ironing press in these publications.
  • WO 96/200 50 also describes in detail the counter-flow rolling process and the synchronous flow rolling process.
  • a tubular blank 1 is subjected to a rotating extrusion process. It plastic deformation or a punctiform doughing of the material occurs.
  • the blank 1 is located on a rotatably driven spinning roll mandrel 2, one or more spinning rollers 3a, 3b, 4a, 4b abutting against the blank 1 during a longitudinal movement.
  • a flow deformation of the metal takes place between the spinning roll mandrel or a forming tool and the spinning rollers 3a, 3b, 4a, 4b, the wall thickness of the blank 1 being reduced and its length being increased.
  • a pipe (with and without weld seam) is suitable as the raw part. It is also conceivable that a tube as a blank is made from several different materials that are joined together. This also includes preforms that are coated on the inside with a surface protective layer (wear protection, protection against heat influences), e.g. B. are provided with AIO 3 . These preforms are suitable to support the different loads on the liner. Other preforms are pot-shaped raw parts (e.g. forged or cold-formed parts) or a round blank. In the event that a tube is used as a blank, the counter-flow rolling process or the synchronous flow rolling process is used. The synchronous spinning rolling process is used for the other raw parts.
  • a surface protective layer wear protection, protection against heat influences
  • the workpiece (tube, cup-shaped part or blank) presses against the tool mandrel under the pressure of the outer forming rollers or pressure rolling rollers in such a way that it takes on the surface quality and its dimensions inside.
  • the prerequisite is that the tool mandrel or the spinning roll mandrel has at least the same or better surfaces or tolerances.
  • the workpiece Due to the springback of the material after the forming operation has been completed, the workpiece lifts a few micrometers from the spinning roll mandrel (depending on the material and Different dimensions) and can be easily removed from the mandrel.
  • Reference number 3a shows the spinning roller at the beginning of the forming operation
  • reference number 3b shows the spinning roller at the end of the forming operation or the pressing operation.
  • reference number 4a shows the spinning roller at the beginning and reference number 4b the spinning roller at the end of the spinning-rolling operation.
  • Reference number 5 shows an anti-rotation device for the blank 1. This anti-rotation device 5 consists of a toothing on the end face against which the blank 1 is pressed.
  • Cylinder liners conventionally have not only a ground surface inside, but also e.g. B a "cross-section", which supports the different tribological stresses on the component and reduces wear. According to the invention, this topography is already applied as a negative image on the pressure-rolling mandrel.
  • the surface of this tool dome is of a quality that is at least as high as the required inner surface quality of the workpiece must correspond.
  • the workpiece lifts a few micrometers due to the springback of the material, so that the rolled-in surface structure is retained without damage after the workpiece has been stripped from the tool mandrel.
  • the procedure described above describes the production of a conventional cylinder liner.
  • the variant described below using the pressure-rolling technique leads to a new type of inner micro-surface of the cylinder liner via the inner surfaces that are comparable with machining methods or other methods. This has special lubricating properties, as regular elevations and depressions in the ⁇ m range are made in the inner surface of the cylinder liner.
  • the inner surfaces produced in this way have special properties that effectively support and greatly improve the tribological tasks of the cylinder liner.
  • These internal structures are realized by special measures and designs on the pressure rollers as well as special settings of the process parameters during pressure rolling.
  • the method described above is suitable for producing "lubrication pockets" without requiring special pretreatment of the tool mandrel.
  • elevations to be applied to the press-rolling mandrel, which present themselves as depressions in the inner surface when the part is press-rolled.
  • These Recesses (or elevations as a negative image on the tool mandrel) can be designed very differently in order to meet the different requirements.As such elevations on the tool mandrel are advantageously only very small (a few ⁇ m to a maximum of 0.015 mm high), the workpiece can after the pressure rolling process, because of the springback of the material already described, can be easily stripped off the tool mandrel without destroying the previously introduced internal structure.
  • these elevations have the shape of a truncated pyramid with a rectangular base.
  • all other possible surveys are also useful.
  • an expanding mandrel (with mechanical, hydraulic, pneumatic or other expanding method) is used according to the invention, which is expanded during the press-rolling operation and is relieved after the forming. This allows Larger differences in diameter are overcome and deeper "lubrication pockets", which go beyond the amount of springback, are produced without the intended internal structure being damaged when the part is stripped off after the shaping operation.
  • the spinning roll mandrel is cup-shaped and has longitudinal slots, so that a locking mandrel that can be pushed into the spinning roll mandrel can spread the spinning roll mandrel.
  • FIG. 3 shows a basic illustration of a special surface structure of a cylinder liner
  • Fig. 5 is a schematic diagram of a mandrel with elevations and the resulting surface structure of the cylinder liner with lubrication pockets and
  • Fig. 6 shows a special spinning roll mandrel in the unspread and spread state.
  • FIG. 2 shows a section of a tool mandrel 2 with indicated cross-cut 7 on its surface.
  • a section from a cylinder liner 6 produced with the aforementioned tool mandrel 2 is shown.
  • This also shows a cross section 7.
  • the cross section 7 on the tool mandrel 2 is the negative form of the cross section on the surface of the cylinder liner 6.
  • FIG. 3 again shows a cylinder liner 6 and an enlarged section of the inner surface.
  • the inner surface shows a special surface structure with drop-shaped elevations 8. This special surface structure has been achieved with a combination of the following features:
  • the height h of these elevations 8 is between 4 and 7 ⁇ m.
  • the three spinning rollers x, y, z are shown in the drawing plane for better illustration. In fact, the three spinning rollers x, y, z are circumferentially offset by 120 °. For a better representation, the axis offset Wx, Wy, Wz between the pressure rollers x, y, z is shown larger than it actually is.
  • the first spinning roller z first comes into contact with the workpiece. With a conical pressing surface 18, it rests on the workpiece. Axial feed reduces the wall thickness of the workpiece by the first pressure roller z, starting from an original wall thickness So, by the thickness z. The first pressure roller z runs on helical tracks over the surface of the workpiece. The feed and 8 the rotational speed at which the pressure roller z turns the workpiece are coordinated so that the pressure roller z covers the entire surface of the workpiece.
  • the entry angle otz is the angle between the pressing surface 18 and the outer surface of the workpiece.
  • the pressing surface 19 of the second pressure roller y has the same geometry.
  • the pressing surface 20 of the third pressure roller x runs at an entry angle ⁇ x.
  • a transition area 21 adjoins the pressing surface 20 and merges into an outlet surface 22 of the pressure roller x.
  • the transition region 21 has a radius Rx.
  • the first and second spinning rollers z, y also each have a transition region with the radii Rz and Ry.
  • the run-out surfaces run at a run-out angle ßx, ßy, ßz with respect to the outer wall of the workpiece.
  • the pressure rollers x, y, z have a different radial distance from the forming tool or the workpiece.
  • the first spinning roller z has the greatest distance since it processes the workpiece first.
  • the original wall thickness So of the workpiece is reduced by the amount z.
  • the input end of the pressing surface 19 of the second pressure roller y now engages.
  • the wall thickness is reduced by the amount y by the pressing surface 19 of the second pressure roller y.
  • the last press roller x reduces the wall thickness by the amount x until the desired target wall thickness S1 of the workpiece is reached.
  • the wall thickness of the workpiece is thus reduced from the original wall thickness So to the target wall thickness S1.
  • the wall thickness reduction d is composed of the individual reductions x, y, z.
  • the elevations 8 have the shape of a truncated pyramid with a rectangular base area. It should be emphasized that the shape of the surveys is only exemplary. Many other forms are possible.
  • the elevations 8 expediently have a maximum height of 0.015 mm. This allows the cylinder liner 6 to be easily pushed off the mandrel 2 after machining. Form the lubrication pockets 11 is of course reversed from that of the elevations 8, so that the lubrication pockets 11 have a maximum depth of 0.015 mm.
  • a special spinning roll mandrel 2 is shown, which is expandable.
  • This spinning mandrel 2, also called expanding mandrel can, for. B. mechanically, hydraulically or pneumatically spread and is spread during the pressure rolling process and relieved after the forming. As a result, the finished cylinder liner can also be pushed by the mandrel 2 if the height of the elevations is greater than z. B. is 0.015 mm.
  • the mandrel 2 is shown in the non-spread state.
  • the spinning roll mandrel 2 is cup-shaped and has longitudinal slots 9.
  • the lower part of FIG. 6 shows this mandrel 2 spread.
  • a locking mandrel 10 is inserted, which is slightly thicker than the cup-shaped cavity in the mandrel 2.
  • the individual parts separated by the longitudinal slots 9 are spread apart.
  • the outer surface of this spinning roll mandrel 2 is provided with the surface structure according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un procédé pour la fabrication d'une chemise de cylindre métallique (6) s'utilisant dans le bloc-cylindres d'un moteur à combustion interne, la surface intérieure de cette chemise de cylindre (6) présentant une structure de surface. Afin de permettre la fabrication de cette chemise de cylindre en une seule opération, ainsi que la réduction des coûts l'accompagnant, la chemise de cylindre (6) est produite avec sa structure de surface en une seule opération à l'aide de la technique du fluotournage connue en soi.
EP99913188A 1998-03-10 1999-02-25 Procede pour la fabrication d'une chemise de cylindre metallique Withdrawn EP1062441A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1998110265 DE19810265A1 (de) 1998-03-10 1998-03-10 Verfahren zur Herstellung einer metallischen Zylinderlaufbuchse
DE19810265 1998-03-10
PCT/EP1999/001204 WO1999046521A1 (fr) 1998-03-10 1999-02-25 Procede pour la fabrication d'une chemise de cylindre metallique

Publications (1)

Publication Number Publication Date
EP1062441A1 true EP1062441A1 (fr) 2000-12-27

Family

ID=7860350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99913188A Withdrawn EP1062441A1 (fr) 1998-03-10 1999-02-25 Procede pour la fabrication d'une chemise de cylindre metallique

Country Status (4)

Country Link
EP (1) EP1062441A1 (fr)
JP (1) JP2002505959A (fr)
DE (1) DE19810265A1 (fr)
WO (1) WO1999046521A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845301B1 (fr) * 2002-10-03 2005-08-05 Peugeot Citroen Automobiles Sa Dispositif de formation d'empreintes en creux sur une surface d'une piece
JP4103876B2 (ja) 2004-09-17 2008-06-18 日産自動車株式会社 溶射前処理方法およびエンジンのシリンダブロックならびに溶射前処理装置
DE102005057945A1 (de) * 2005-12-05 2007-06-21 Reichhardt, Hans H. Verfahren, Maschine und Werkzeuge zur spanlosen Herstellung von Rohrabschnitten und rohrförmigen Werkstücken mit reduziertem Innendurchmesser in Form eines Absatzes
JP2019130577A (ja) * 2018-02-01 2019-08-08 株式会社Ｉｈｉエアロスペース 圧延加工部材の製造方法及び圧延加工部材の製造装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1318631A (en) * 1970-06-22 1973-05-31 Le I Tochnoj Mekhaniki Optiki Method of making grooves on surfaces of an article apparatus therefor and article made by said method
DE2225390A1 (de) * 1972-05-25 1973-12-06 Messerschmitt Boelkow Blohm Vorrichtung und verfahren zur herstellung definierter wanddickenaenderungen eines rotationssymmetrischen hohlkoerpers
DE2420014A1 (de) 1973-06-07 1975-01-02 France Etat Verfahren zur herstellung von zuegen oder riefen in der innenflaeche von koerpern mit gerader oder gebogener mantellinie waehrend einer verformung durch abstreckdruekken, sowie vorrichtung zur durchfuehrung dieses verfahrens
DE4010901A1 (de) * 1990-04-04 1991-10-17 Gkn Automotive Ag Antriebswelle
CH685542A5 (de) * 1992-07-16 1995-08-15 Grob Ernst Fa Verfahren zum Herstellen eines hohlen Werkstücks, das wenigstens innen gerade oder schräg zur Werkstückachse profiliert ist.
DE4446919A1 (de) 1994-12-28 1996-07-04 Dynamit Nobel Ag Verfahren zur Herstellung von innenverzahnten Teilen
DE19532244C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (I)
DE19722359A1 (de) * 1997-05-28 1998-12-03 Dynamit Nobel Ag Drückwalzvorrichtung und Verfahren zur Herstellung von Hohlrädern mit zwei Innenverzahnungen
DE19723198A1 (de) * 1997-06-03 1998-12-10 Dynamit Nobel Ag Drückwalzvorrichtung und Verfahren zur Herstellung eines stirnverzahnten Werkstückes

Non-Patent Citations (1)

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Title
See references of WO9946521A1 *

Also Published As

Publication number Publication date
JP2002505959A (ja) 2002-02-26
DE19810265A1 (de) 1999-09-16
WO1999046521A1 (fr) 1999-09-16

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