WO2014198933A1 - Substitution du contour intérieur dans un piston de moteur à combustion interne - Google Patents

Substitution du contour intérieur dans un piston de moteur à combustion interne Download PDF

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Publication number
WO2014198933A1
WO2014198933A1 PCT/EP2014/062441 EP2014062441W WO2014198933A1 WO 2014198933 A1 WO2014198933 A1 WO 2014198933A1 EP 2014062441 W EP2014062441 W EP 2014062441W WO 2014198933 A1 WO2014198933 A1 WO 2014198933A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
closure element
internal combustion
internal
inner mold
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.)
Ceased
Application number
PCT/EP2014/062441
Other languages
German (de)
English (en)
Inventor
Matthias Laqua
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of WO2014198933A1 publication Critical patent/WO2014198933A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
    • 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
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to the inner shape of a piston for an internal combustion engine and a method for producing the piston, according to the features of the respective preambles of the independent claims.
  • the object of the invention is to simplify the manufacture of the interior of a piston and to reduce the mass of the piston.
  • the interior or the inner mold (also referred to as the inner region of the piston, for example below the piston crown or a combustion bowl and above a piston pin) is machined out of a piston lower part by a turning process.
  • the removal of material, in particular steel, from this region reduces the mass of the piston according to the invention compared with pistons having an inner shape, in particular of steel, without this material removal.
  • By turning the material is worked out cost over the pin eye cost.
  • the inner mold is provided with a closure element to form a cooling space. In order to obtain a particular internal cooling space, the interior is closed after processing with a closure element.
  • the inner cooling space can, but need not be accessible at least via an inlet and / or at least one drain opening for a cooling medium.
  • This at least one drain and / or inlet opening which can be embodied as a bore, is located in the area surrounding the interior of the piston material. Alternatively or additionally, the at least one drain and / or inlet opening is formed by the closure element.
  • the closure element has the shape of a circular disk with a central opening for the flow through the cooling medium.
  • a cavity in the inner region of a blank for the piston lower part for producing the piston is produced by casting. Subsequent turning creates an inner shape. The blank is thus easier and cheaper to produce by the less complex geometry in the casting process.
  • the inner form or the interior according to the invention can be closed by a closure element.
  • a cavity is produced in the inner region of a blank for the piston lower part for producing the piston by forging.
  • an inner shape is generated.
  • the blank is thus simpler and less expensive to produce as an alternative to the casting process in the forging process by the less complex geometry.
  • This inner form according to the invention can be closed by a closure element.
  • the closure member for forming and closing the cavity or the interior can be made of different materials that meet the mechanical, thermodynamic and fluidic requirements of the piston during operation in the internal combustion engine.
  • the closure element may be made of metals such as steel, aluminum, alloys thereof, high-temperature plastic or rubber.
  • the Closure element can be fixed in force, form or cohesively on the lower part of the piston. For example, this is done by gluing, screwing, clamping or welding.
  • the piston lower part and the piston upper part can be joined together in a force, shape and / or material fit first to form a piston blank.
  • the machined piston blank then forms a one-piece operational piston.
  • first the piston blank and then also the finished piston produced therefrom are machined and thereby always formed in one piece.
  • Turning is understood to mean, in particular, turning as cutting with closed, mostly circular cutting movement and any feed movement lying transversely to the cutting direction.
  • the axis of rotation of the cutting movement preferably maintains its position relative to the workpiece, regardless of the feed movement.
  • Cutting is understood as cutting in which material layers in the form of chips for changing the workpiece shape and / or workpiece surface are mechanically separated from a workpiece by means of the cutting of a tool.
  • a tool is used whose cutting edge number, geometry of the cutting wedges and the position of the cutting edges are determined by the workpiece.
  • a method for producing a piston for internal combustion engines, in particular a cooling channel piston, comprising a piston lower part and a piston upper part, an inner shape being machined out of the piston, in particular the piston lower part, by turning machining.
  • the closure element replaces the known from the prior art structure in the piston lower part to form an internal cooling chamber and optionally a Abiaufbohrung. Due to the simple geometry of the closure element, such as a circular disc with a centered opening, the closure element is inexpensive to produce. The closure element is used above all when the piston to be produced has an internal cooling space.
  • the piston is produced by the method described above.
  • the method described above makes it possible to produce a cost-effective piston with optional internal cooling space.
  • the material savings reduce the mass of the piston compared to comparable known from the prior art piston.
  • the closure element is made of a material having a lower density relative to the material of the piston.
  • the closure element may be made of aluminum or a corresponding steel or aluminum alloy.
  • the invention provides that the closure element made of steel, a steel alloy, aluminum, an aluminum alloy, plastic or rubber is made.
  • aluminum or aluminum alloys are particularly suitable for the production of the closure element, since they also withstand the thermal stresses particularly well.
  • Plastics and rubber are also suitable for the substitution of steel or aluminum or the corresponding alloys in the production of the closure element.
  • a suitable material for the production of the closure element must be selected.
  • closure element is formed integrally in a particularly advantageous manner, it may also be formed as two or more than two parts. The respective parts then have the same or different shapes.
  • FIG. 1 shows a piston according to the invention
  • FIG. 2 shows a partial view of the piston according to the invention
  • Figure 3 shows a piston of the prior art
  • Figure 4 shows a partial view of a piston of the prior art.
  • FIGS. 1 and 2 show a piston 1 according to the invention.
  • a piston 30 known from the prior art is shown for clarity. Identical elements are given the same reference numerals in all figures.
  • top, bottom, left, right, front, back, etc. refer exclusively to the example representation and position of the device and other elements selected in the figures. These terms are not meant to be limiting, that is, by different Positions and / or mirror-symmetric design or the like may change these references.
  • the 1 shows a piston 1 according to the invention with a lower part 2 and an upper part 3.
  • the lower part 2 has a one-piece closure element 4 here, which has an opening 6.
  • the closure element covers the underlying cavity 10 (including a possibly present rotational contour 5) (see FIG. 2).
  • the closure element 4 is designed as a circular ring with a central circular opening 6.
  • the closure element 4 is surrounded by four openings 7 in the material of the piston 1 enclosing the closure element 4, more precisely of the lower part 2. There may also be fewer or more than four openings 7.
  • a radial circumferential recess 8 connects.
  • it is arranged behind a ring field and, if present, concentrically around a combustion bowl.
  • This depression or channel forms part of a cooling channel.
  • Such a cooling channel may, as shown, remain open, or be covered by a corresponding element to a closed cooling channel.
  • In the wall of the recess 8 there is at least one inlet and / or at least one drain opening for a cooling medium, for which purpose in this figure representative at least one bore 9 is shown.
  • the openings 7 can form transfer channels for the cooling medium from the inner area to the recess 8.
  • screws in particular expansion screws
  • the openings 7 can be guided through the openings 7 (for example, designed as subsequently introduced bores or introduced during the glazing) with which the lower part 2 is joined to the upper part 3 by screws.
  • Lower part 2 and upper part 3 are parts manufactured separately from one another, which are assembled in a suitable manner (for example screwing or welding) to form the ready-to-use piston 1.
  • a suitable manner for example screwing or welding
  • lower part 2 and upper part 3 can form a one-piece piston blank.
  • FIG. 2 shows a partial view of the piston 2 according to the invention.
  • the opening in the FIGURE is selected such that the view of an interior area (hereinafter referred to as FIG Cavity 10 denotes) is free.
  • the cavity 10 was machined out of the piston base 2 by machining. Good to see is a rotating contour 5, created by a machining from above. As an inner mold 1 1, the cavity 10 and the rotational contour 5 are designated.
  • FIG. 3 shows a piston 30, as known from the prior art.
  • the built piston 30 consists of a piston lower part 2 and a piston upper part 3.
  • the lower piston part 2 has an inner cooling channel 31 with a Abiaufbohrung 32.
  • FIG. 4 shows a partial view of a piston 30 according to FIG. 3.
  • FIG. 3 shows the drainage bore 32 and the area to be machined underneath. Furthermore, a very complex and thus cost-intensive geometry 33 can be seen in the production. This area can not be forged and thus must be milled out consuming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un piston (1) pour des moteurs à combustion interne, notamment d'un piston à canal de refroidissement, comportant une jupe de piston (2) et une tête de piston (3), un contour intérieur (11) étant creusé par tournage dans le piston (1), notamment dans la jupe de piston (2), ainsi qu'un piston fabriqué selon ce procédé.
PCT/EP2014/062441 2013-06-14 2014-06-13 Substitution du contour intérieur dans un piston de moteur à combustion interne Ceased WO2014198933A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211214 2013-06-14
DE102013211214.9 2013-06-14

Publications (1)

Publication Number Publication Date
WO2014198933A1 true WO2014198933A1 (fr) 2014-12-18

Family

ID=50942288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/062441 Ceased WO2014198933A1 (fr) 2013-06-14 2014-06-13 Substitution du contour intérieur dans un piston de moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102014211401A1 (fr)
WO (1) WO2014198933A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114161087B (zh) * 2021-12-01 2023-11-28 上海航天设备制造总厂有限公司 一种由异种材料组成的活门组件的加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919638A1 (de) 1979-05-16 1980-11-20 Schmidt Gmbh Karl Kolben fuer brennkraftmaschinen
WO2003025376A1 (fr) * 2001-09-19 2003-03-27 Mahle Gmbh Procede pour produire un piston ou une tete de piston pour un moteur a combustion interne
US20040231631A1 (en) * 2003-05-21 2004-11-25 Rainer Scharp Method for the production of a one-piece piston for an internal combustion engine
DE102011077088A1 (de) * 2011-06-07 2012-12-13 Mahle International Gmbh Verfahren zur gleichzeitigen Herstellung eines ersten und zweiten Kolbenteils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919638A1 (de) 1979-05-16 1980-11-20 Schmidt Gmbh Karl Kolben fuer brennkraftmaschinen
WO2003025376A1 (fr) * 2001-09-19 2003-03-27 Mahle Gmbh Procede pour produire un piston ou une tete de piston pour un moteur a combustion interne
US20040231631A1 (en) * 2003-05-21 2004-11-25 Rainer Scharp Method for the production of a one-piece piston for an internal combustion engine
DE102011077088A1 (de) * 2011-06-07 2012-12-13 Mahle International Gmbh Verfahren zur gleichzeitigen Herstellung eines ersten und zweiten Kolbenteils

Also Published As

Publication number Publication date
DE102014211401A1 (de) 2014-12-18

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