EP0893182B1 - Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine - Google Patents
Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0893182B1 EP0893182B1 EP98111215A EP98111215A EP0893182B1 EP 0893182 B1 EP0893182 B1 EP 0893182B1 EP 98111215 A EP98111215 A EP 98111215A EP 98111215 A EP98111215 A EP 98111215A EP 0893182 B1 EP0893182 B1 EP 0893182B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting mould
- hollow cylindrical
- process according
- metallic melt
- casting
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 49
- 239000002184 metal Substances 0.000 description 49
- 238000004512 die casting Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 229910000676 Si alloy Inorganic materials 0.000 description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
Definitions
- the invention relates essentially to a manufacturing method for a hollow cylindrical body, especially for a cylinder liner Internal combustion engine, by pouring one into a mold Molten metal with the help of an interior of the hollow cylindrical Body-forming molded body, wherein essentially the required Amount of molten metal is poured into the mold and then a press die acting as a shaped body in the mold introduced and immersed in the molten metal that the Press the metal melt into one of the mold and the Press stamp formed displaced annulus.
- Such manufacturing or Casting processes are known as die casting or die casting, for example described in FR 1,383,823 A or DE 633 209 C.
- the method according to the invention can also be of high quality Cylinder liners for internal combustion engines are manufactured, since the so-called Press casting in the casting process a defined metal structure in the cast product can be generated. This applies in particular to those used Light metal alloys, especially hypereutectic aluminum-silicon alloys.
- Those made by die casting or die casting Cans have a defined metal structure, in particular on the inside of the sleeve, which is the raceway for the piston of the reciprocating internal combustion engine forms, where then a defined structure with separated Primary silicon is present in a certain grain size. For the rest is in of the FR 1,383,823 A mentioned at the beginning already the production of Internal combustion engine cylinder liners by die casting or die casting mentioned.
- the press ram is viewed geodetically from above down the correspondingly positioned, with respect to the longitudinal axis of the hollow body vertically aligned mold, the molten metal, which is initially at the bottom or bottom of the mold is located on the side of the ram inside the mold upwards repressed.
- the counterforce for the ram then forms gravity the molten metal.
- the press ram and the mold liquid, hot molten metal cooled, resulting in a defined metal structure formation is beneficial.
- the press ram additionally heatable, i.e. especially coolable, so when casting a hypereutectic Aluminum-silicon alloy through a defined temperature control desired crystal formation of the silicon primary grains can be achieved.
- This desired crystal formation is already mentioned in cylinder liners especially on the inside, d. H. on the inside of the hollow cylindrical Body desired, which in the inventive method in there is direct contact with the press ram.
- Figure 1 shows a simplified Shown mold during the filling with molten metal
- Figure 2 this casting mold with the press die retracted therein
- FIG. 3 a different one designed press ram in section
- Figure 4 shows a detail of another variant of the press ram
- Figure 5 is the supervision of one of several molds containing mold.
- the reference number 1 in FIG. 2 denotes a hollow cylindrical body which can be produced by the casting process according to the invention.
- this hollow cylindrical body 1 can be used after a slight further processing as a cylinder liner of an internal combustion engine.
- the hollow cylindrical body 1 shown in FIG. 2 has a circumferential collar 2 at its upper end region and a bottom 3 at its opposite lower end region, which, like the circumferential collar 2, are not required for use as an internal combustion engine cylinder liner procedural reasons, however, can also arise in the manufacturing process according to the invention.
- the hollow cylindrical body 1 is to be used as an internal combustion engine cylinder liner, it is necessary to trim this body 1 along the dividing lines designated by the reference numerals 4, ie to saw them off at these points. The region of the hollow cylindrical body 1 lying between these two dividing lines 4 can then be used as the cylinder liner.
- the hollow cylindrical body 1 is now produced as follows: In the casting mold, designated in its entirety with 10, is first a sufficient, d. H. essentially the required amount of molten metal 5 filled.
- the mold 10 is in relation to the axis 6 of the hollow cylindrical body 1, which in the following as the hollow body longitudinal axis is positioned inclined to the vertical.
- the metal melt can also be dosed by a pressurized melting furnace itself).
- the inclination of the casting mold 10 can limit the amount of molten metal 5 introduced in such a way that an amount exceeding the required amount overflows from the inclined casting mold 10. With this inclined position of the casting mold 10, it is also possible to remove an oxide skin 7, which can form on the surface of the molten metal 5, in a simple manner prior to the further method steps, ie to remove it by means of a suitable stripping element. However, it is also possible to prevent this oxide skin 7 from being formed at all by introducing an inert gas into the casting mold 10.
- the casting mold 10 is aligned vertically with respect to the longitudinal axis 6 of the hollow body, ie pivoted from the inclined position into the vertical, as shown in FIG. 2.
- a press ram 20 is inserted into the interior of the casting mold 10 from top to bottom.
- the dimensions of the mold 10 and the press die 20 are matched to one another in such a way that there is an annular space 9 between the side walls of the press die 20 and the mold 10, which corresponds to the hollow cylindrical body 1 to be produced.
- the press die 20 thus represents a shaped body for shaping the interior of the hollow cylindrical body 1.
- the mold 10 is constructed in two parts or in several parts, two side wall sections 15a, 15b forming the outer contour of the hollow cylindrical body 1, while a base plate 14 closes the mold 10 at the bottom and is required for this To deflect the molten metal upwards as lamellarly as possible by the press die 20 moving into the mold 10.
- an additional volume 12 is provided in the mold 10, which the rotating collar 2 of the forms hollow cylindrical body 1.
- This additional volume 12 acts as Relaxation space for the molten metal 5 displaced into the annular space 9. It is also not shown that with the provision of appropriate free spaces in the Casting mold 10 of course also made cylinder liners with a collar can be, this covenant then within the between the dividing lines 4 area is formed.
- the pressing die 20 can be moved out of the casting die 10 in the direction of the arrow 8.
- a scraper ring 11 is provided above the die 10, on which the die 20 slides along the die 10 when it is pulled out.
- the casting mold 10 can then be opened, ie divided, along a parting plane 16 which contains the longitudinal axis 6 of the hollow body (cf. FIG. 5) in order to be able to remove the hollow cylindrical body 1 from the separable casting mold 10.
- this hollow cylindrical body 1 is now to be used as an internal combustion engine cylinder liner, then this body 1 is then trimmed along the dividing lines 4, ie the end sections of the hollow cylindrical body 1 lying outside the area delimited by the dividing lines 4 are sawn off.
- a molten metal an appropriately pretreated hypereutectic Aluminum-silicon alloy is used, so can the casting process described in the hollow cylindrical body 1 a defined Metal structure are generated, and not just because of the Press 20 on the molten metal 5 acting pressure, but also due to the targeted cooling of the molten metal 5 on the one hand in Outside area of the hollow cylindrical body 1 by contact with the mold 10, and on the other hand in the inner region of the hollow cylindrical Body by contact with the ram 20.
- both the casting mold 10 and the press die 20 can be suitably tempered, as will be explained in more detail below.
- cavities 13 are provided in the casting mold 10, in or through which is a suitable heat transfer medium with a suitable temperature can be directed. So it may be necessary to mold 10 at Filling the molten metal 5 in the first process step (see FIG. 1) heat to prevent pre-solidification of the molten metal 5.
- the press die 20 reaches the position shown in Figure 2, so can the casting mold 10 through the heat transfer medium / coolant passed through the cavities 13 be cooled to the desired solidification of the Metal melt 5 in the from the mold 10 and the ram 20th to control the formed annular space 9.
- the press die 20 can also be cooled for this purpose.
- a temperature control channel 21 for a heat transfer medium or a coolant can be provided for this within the press ram 20, which, starting from a supply connection (not shown) located above, essentially in a direct way to the end face 22 of the press ram 20 and from it helically runs close to the outside of the ram 23 to a discharge connection (not shown) (also at the top).
- the direct application of the heat transfer medium / coolant to the press ram end 22 from the inside ensures particularly intensive cooling in this highly relevant area, while the cooling effect on the press ram outside 23 decreases as desired from the bottom up. Otherwise, liquid or gaseous heat transfer medium / coolant can be used both for the press ram 20 and for the casting mold 10.
- the temperature of the ram 20 in particular with regard to a desired crystal formation of the silicon primary grains respectively.
- the silicon grains may be used do not grow too quickly, which is due to the targeted cooling, which one early solidification of the molten metal 5 is beneficial is prevented.
- Figure 3 also shows a possible design of the press ram end 22, which differs from that of Figure 2. While at the Representation according to Figure 2, the press face end 22 flat and at right angles is formed to the outside of the ram 23 is in the illustration according to FIG. 3, the press face end 22 is concavely curved inwards. As a result, a free space 25 is formed below the press punch end face 22, in which when the metal melt 5 is displaced by the Press die 20 an oxide skin located on the molten metal surface (see reference number 7 in Figure 1) can collect. This will avoided that components of this oxide skin 7 in the material of the actual the section forming the hollow cylindrical body 1 (between the two dividing lines 4) can reach.
- Deviating from this or the design of the press ram shown in Figure 2 2 can also press face end face 22 if necessary the hollow body longitudinal axis 6 be inclined, d. H. with the outside of the ram 23 include an angle other than a right angle.
- FIG. 4 Yet another possible shape for the press face end 22 is shown in FIG. 4, this convexly curved end face 22 being an optimal one Displacement of the molten metal 5 conducive to the press ram 20 is. With this shape, the molten metal 5 is thus through the ram 20 optimally in between the ram 20 and the Casting die 10 displaced lying annular space 9.
- FIG. 4 also shows a ventilation device 24 for the molten metal 5, which is provided on the end face of the press die 20.
- this venting device 24 can be an air permeable element, for example from a sintered material, which is in or on a suitable Passage opening is arranged in the press ram end 22.
- About these Venting device 24 cannot melt metal into the interior of the ram 20 penetrate, but probably between the ram 20 and the molten metal 5 trapped air, so that air pockets / voids in a hollow cylindrical body 1 manufactured according to the invention be avoided.
- the press die 20 itself can be formed in one part or in several parts.
- the outside of the ram 23 is expediently slightly conical, in particular around the press die 20, starting from that in FIG shown position after at least substantially complete solidification the metal melt 5 simply against the direction of arrow 8 from the mold 10 to be able to pull out.
- the casting mold 10 is expediently constructed in several parts and exists alongside a bottom plate 14 of two side wall sections 15a, 15b, which is preferred in a parting plane 16 containing the hollow body longitudinal axis 6 (cf. Figure 5) are separable from each other around the hollow cylindrical body 1 can be removed from the mold 10.
- the already mentioned cavities 13 for guiding a heat transfer medium provided in particular in the side wall sections 15a, 15b however, are also located in the base plate 14.
- the Separating plane 16 alternatively also run through this base plate 14.
- the inner wall forming the outer wall of the hollow cylindrical body 1 the casting mold 10 or the side wall sections 15a, 15b can also with Shape contours, not shown, are provided, which are in the outer surface impress the hollow cylindrical body 1 to be cast.
- Shape contours can, for example, be designed as corrugation to on the outside of the hollow cylindrical body 1 has a corresponding surface structure to obtain an improved later pouring of the same guaranteed in a housing.
- cylinder liners for internal combustion engines - and it can be one of those act hollow cylindrical body 1 - provided with ribbing on the outside, as is known to twist or migrate into an internal combustion engine crankcase cast cans inside the same to prevent.
- Figure 5 also shows that in a multi-mold 10 containing Molding tool 17 several hollow cylindrical bodies 1 lying side by side manufactured, d. H. can be poured.
- each hollow cylindrical body 1 or each mold 10 has its own press ram 20 required.
- the individual hollow cylindrical body 1 molded separately from each other or cast / pressed together be, the connection between the individual cylinder liners (or hollow cylindrical body 1) compact or interrupted can be trained.
- hollow cylindrical represents explicitly not restricted to rotationally symmetrical bodies represent, but the hollow cylindrical body can also be oval or out of round be and have outer and inner contours.
- cylinder liners can be produced using the casting method described made of a hypereutectic aluminum-silicon alloy become.
- press-cast cylinder liners Processing of the cylinder surfaces is further processed, and this is done here the base material is etched or brushed out on the running surfaces.
- the silicon grains that are primarily excreted and exposed by this aftertreatment then form an extremely hard and wear-resistant tread for the pistons of the internal combustion engine.
- a basic requirement for this is of course, that in the cylinder liners or in the hollow cylindrical Body 1 has a defined metal structure, which by casting and a subsequent pressing of the molten metal 5 corresponding to that described Process in particular through targeted exposure to temperature can be generated.
- the cylinder liners thus produced can then for Pouring used in all casting processes and in every engine crankcase are poured in, for this crankcase, So the actual cast body, a well pourable and editable and so that inexpensive aluminum or magnesium alloy can be used can.
- a cylinder liner as a hollow cylindrical body 1 can be used to generate the desired structure in the solidified molten metal 5 temperature gradients in the range of 1 to 300 Kelvin between the mold 10 and the press die 20 can be realized.
- the pressures of the die 20 moving into the mold 10 can range from 0.1 bar to 2000 bar.
- the Press die 20 with a linear or variable speed structure be retracted into the mold 10 in the direction of the arrow 8.
- the end position limitation for the movement of the ram 20 can be pressure controlled or be path dependent.
- the Pressure build-up caused by the press die 20 is transferred to the molten metal 5, and the Temperature control of the ram 20 and / or the mold 10 during each work cycle can be designed variably, for example depending from the path or the position of the ram 20 or from the Position of the mold 10.
- the latter can be pivoted around the molten metal 5 - as shown in Figure 1 - and on the other hand the press die 20 - as shown in Figure 2 - in the geodetic direction of to be able to insert into the mold 10 from top to bottom. Furthermore it may be advisable to turn the casting mold 10 into further positions, tilt it or to be able to proceed, for example after filling according to Figure 1 to another work station, at which then the press ram 20 can be retracted into the mold according to FIG. At this A suitable device is of course required in the workplace it enables the press ram 20 to be as accurate as possible in terms of size and pressure Retract mold 10.
- hollow cylindrical bodies 1 and in particular cylinder liners can be manufactured individually and inexpensively.
- This hollow cylindrical body 1 in particular cylinder liners
- This hollow cylindrical body 1 can Its crystal structure is individually tailored to the later application without alloying the entire casting.
- various wear-resistant light metal alloys can be used be used, whereby not only a uniform structure be generated over the entire hollow cylindrical body 1 can, but by appropriate tempering or temperature control also an individual structure in different zones of the hollow cylindrical body 1 or the cylinder liner can be obtained.
- a variety of other details may vary be designed from the embodiment shown, without the content of the claims to leave.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß die Gießform für das Befüllen mit Metallschmelze im Hinblick auf die Hohlkörper-Längsachse gegenüber der Vertikalen geneigt positioniert und für das Einführen des Preßstempels in die Vertikale geschwenkt wird. Hierdurch sind nämlich, wie im weiteren erläutert wird, zwei Effekte nutzbar, die Inhalt der Unteransprüche 2 und 3 sind. Vorteilhafte Weiterbildungen des Verfahrens sind in den weiteren Unteransprüchen angegeben.
Soll somit der hohlzylindrische Körper 1 als Brennkraftmaschinen-Zylinderbüchse eingesetzt werden, so ist es erforderlich, diesen Körper 1 längs der mit den Bezugsziffern 4 bezeichneten Trennlinien zu beschneiden, d. h. an diesen Stellen abzusägen. Als Zylinderbüchse verwendet werden kann dann der zwischen diesen beiden Trennlinien 4 liegende Bereich des hohlzylindrischen Körpers 1.
Zum anderen kann durch die Neigung der Gießform 10 die Menge von eingebrachter Metallschmelze 5 begrenzt werden, derart, daß ein über die erforderliche Menge hinausgehender Mengenanteil aus der geneigten Gießform 10 überläuft.
Femer ist es mit/bei dieser geneigten Position der Gießform 10 möglich, eine Oxidhaut 7, welche sich auf der Oberfläche der Metallschmelze 5 bilden kann, vor den weiteren Verfahrensschritten auf einfache Weise zu entfernen, d. h. mittels eines geeigneten Abstreifelementes abzuziehen. Es ist jedoch auch möglich, eine Bildung dieser Oxidhaut 7 durch Einleiten eines inerten Gases in die Gießform 10 überhaupt zu verhindern.
Nun wird in geodätischer Betrachtungsweise von oben nach unten ein Preßstempel 20 in den Innenraum der Gießform 10 eingeführt. Von den Abmessungen her sind die Gießform 10 sowie der Preßstempel 20 dabei derart aufeinander abgestimmt, daß sich zwischen den Seitenwänden des Preßstempels 20 und der Gießform 10 ein Ringraum 9 befindet, welcher dem herzustellenden hohlzylindrischen Körper 1 entspricht. Wird nun der Preßstempel 20 gemäß Pfeilrichtung 8 wie beschrieben in die Gießform 10 eingefahren, so taucht dieser Preßstempel 20 in die Metallschmelze 5 ein verdrängt diese dabei in den besagten Ringraum 9, und zwar entgegengerichtet zu der auf die Metallschmelze 5 einwirkenden Schwerkraft. Der Ringraum 9 zwischen der Gießform 10 und dem Preßstempel 20 wird somit mit der Metallschmelze 5 befüllt, wodurch der hohlzylindrische Körper 1 gebildet wird. Wie klar ersichtlich ist, stellt der Preßstempel 20 somit einen Formkörper zur Formung des Innenraumes des hohlzylindrischen Körpers 1 dar.
Anschließend kann die Gießform 10 entlang einer die Hohlkörper-Längsachse 6 enthaltenen Trennebene 16 (vgl. hierzu Figur 5) geöffnet, d. h. geteilt werden, um den hohlzylindrischen Körper 1 aus der teilbaren Gießform 10 entnehmen zu können.
Soll dieser hohlzylindrische Körper 1 nun als Brennkraftmaschinen-Zylinderbüchse zum Einsatz kommen, so wird anschließend dieser Körper 1 entlang der Trennlinien 4 beschnitten, d. h. die außerhalb des von den Trennlinien 4 begrenzten Bereiches liegenden Endabschnitte des hohlzylindrischen Körpers 1 werden abgesägt.
Im übrigen können sowohl für den Preßstempel 20 als auch für die Gießform 10 flüssige oder gasförmige Wärmeträgermittel/Kühlmittel zum Einsatz kommen.
Claims (11)
- Herstellverfahren für einen im wesentlichen hohlzylindrischen Körper (1), insbesondere für eine Zylinderbüchse einer Brennkraftmaschine, durch Vergießen einer in eine Gießform (10) eingebrachten Metallschmelze (5) unter Zuhilfenahme eines den Innenraum des hohlzylindrischen Körpers (1) bildenden Formkörpers, wobei im wesentlichen die erforderliche Menge von Metallschmelze (5) in die Gießform (10) eingefüllt wird und anschließend ein als Formkörper wirkender Preßstempel (20) derart in die Gießform (10) eingeführt und hierbei in die Metallschmelze (5) eingetaucht wird, daß der Preßstempel (20) die Metallschmelze (5) in einen von der Gießform (10) und dem Preßstempel (20) gebildeten Ringraum (9) verdrängt,
dadurch gekennzeichnet, daß die Gießform (10) für das Befüllen mit Metallschmelze (5) im Hinblick auf die Hohlkörper-Längsachse (6) gegenüber der Vertikalen geneigt positioniert und für das Einführen des Preßstempels (20) in die Vertikale geschwenkt wird, - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß vor dem Schwenken der Gießform (10) in die Vertikale die auf der Metallschmelze (5) befindliche Oxidhaut (7) entfernt wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Neigung der Gießform (10) für das Befüllen mit Metallschmelze (5) so eingestellt wird, daß im wesentlichen die erforderliche Menge von Metallschmelze (5) einfüllbar ist, ein darüber hinausgehender Mengenanteil jedoch aus der geneigten Gießform (10) überläuft. - Verfahren nach einem der vorangegangenen Ansprüche zur Herstellung einer Zylinderbüchse aus einer übereutektischen Aluminium-Silizium-Legierung,
dadurch gekennzeichnet, daß nach Einführen des Preßstempels (20) die Gießform (10) und/oder der Preßstempel (20) gekühlt wird, um eine gewünschte Erstarrung der Metallschmelze (5) im Ringraum (9) zu steuern, so daß eine gewünschte Kristallbildung der Silizium-Primärkömer erfolgt. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß nach zumindest im wesentlichen vollständiger Erstarrung der Metallschmelze (5) der Preßstempel (20) aus der Gießform (10) herausgeführt, danach der gegossene hohlzylindrische Körper (1) aus der teilbaren Gießform (10) entnommen und danach an zumindest einer seiner Stirnseiten beschnitten wird. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß ein Preßstempel (20) verwendet wird, innerhalb dessen ein Temperierkanal (21) für ein Wärmeträgermedium oder Kühlmittel vorgesehen ist, der ausgehend von einem Zufuhranschluß im wesentlichen auf direktem Weg zur Stimseite (22) und von dieser aus wendeiförmig nahe der Preßstempel-Außenseite (23) zu einem Abfuhranschluß verläuft. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß eine Gießform verwendet wird, in deren oberen Endbereich im von der Gießform (10) sowie dem Preßstempel (20) gebildeten Ringraum ein als Entspannungsraum fungierendes Zusatzvolumen (12), in welches Metallschmelze (5) verdrängt werden kann, vorgesehen ist. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß ein Abstreifring (11) vorgesehen ist, an dem der Preßstempel (20) beim Herausziehen aus der Gießform (10) entlanggleitet. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß ein Preßstempel (20) mit einer stirnseitig vorgesehenen Entlüftungsvorrichtung (24) für die Metallschmelze (5) verwendet wird. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß mehrere hohlzylindrische Körper (1) nebeneinander hergestellt werden, wozu in einem Formwerkzeug (17) nebeneinanderliegend mehrere Gießformen (10) zur gleichzeitigen Herstellung mehrerer hohlzylindrischer Körper (1) unter Einsatz mehrerer Preßstempel (20) vorgesehen sind. - Verfahren nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß mittels einer geeignet gestalteten Gießform-Innenwand in die Außenfläche des zu gießenden hohlzylindrischen Körpers (1) Formkonturen eingeprägt werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19731804 | 1997-07-22 | ||
| DE19731804A DE19731804A1 (de) | 1997-07-24 | 1997-07-24 | Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0893182A1 EP0893182A1 (de) | 1999-01-27 |
| EP0893182B1 true EP0893182B1 (de) | 2002-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98111215A Expired - Lifetime EP0893182B1 (de) | 1997-07-22 | 1998-06-18 | Herstellverfahren für eine Zylinderbüchse einer Brennkraftmaschine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0893182B1 (de) |
| DE (2) | DE19731804A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10221673C5 (de) * | 2002-05-16 | 2008-12-04 | Audi Ag | Zylinderliner zum Eingießen in ein Zylindergehäuse |
| DE102005051561B3 (de) * | 2005-10-26 | 2007-01-11 | Honsel Gmbh & Co Kg | Verfahren und Anlage zum Gießen von Leichtmetall-Zylinderkurbelgehäusen in Sandformen |
| DE102008054718B4 (de) * | 2008-12-16 | 2012-11-22 | Federal-Mogul Nürnberg GmbH | Gießform für den Schwerkraftguss und Schwerkraftgießverfahren |
| DE102009023329A1 (de) | 2009-05-29 | 2010-12-02 | Daimler Ag | Gusskern zur Anordnung in einer Gussform |
| CN110842206B (zh) | 2019-11-12 | 2021-08-31 | 丹阳市剑庐工具有限公司 | 一种六角高扭钻柄的制备方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE633209C (de) * | 1931-12-29 | 1936-07-22 | Fraser Jones Ltd | Verfahren zum Giessen von Hohlbloecken |
| FR1383823A (fr) * | 1963-09-24 | 1965-01-04 | Procédé de fabrication de pièces moulées en acier, fonte, ou autres métaux lourds et pièces ainsi fabriquées | |
| US4122596A (en) * | 1977-10-05 | 1978-10-31 | Ford Motor Company | Magnesium die-cast brake master cylinder |
| DE3212352A1 (de) * | 1982-04-02 | 1983-10-20 | Fen S. Arseniev Abdulin | Verdraengungsgussmaschine |
| FR2537654B2 (fr) * | 1982-06-17 | 1987-01-30 | Pechiney Aluminium | Perfectionnement des chemises de moteurs a base d'alliages d'aluminium et de grains de silicium calibres et leurs procedes d'obtention |
| GB2128517A (en) * | 1982-07-27 | 1984-05-02 | Gkn Technology Ltd | Squeeze-forming press |
| FI77405C (fi) * | 1986-03-20 | 1989-03-10 | Uponor Nv | Foerfarande och anordning foer framstaellning av kamflaensroer. |
| WO1989002326A1 (en) * | 1987-09-08 | 1989-03-23 | Brunswick Corporation | Evaporable foam casting system utilizing a hypereutectic aluminum silicon alloy |
| US5316070A (en) * | 1989-12-11 | 1994-05-31 | Comalco Aluminum Limited | Controlled casting of Al-Si hypereutectic alloys |
| GB2241452B (en) * | 1990-03-02 | 1993-08-11 | Gkn Technology Ltd | Tooling |
| GB2243620B (en) * | 1990-03-27 | 1994-06-29 | Atsugi Unisia Corp | Improvements in and relating to forming aluminium-silicon alloy |
| DE4212716A1 (de) * | 1992-04-16 | 1993-10-21 | Ks Aluminium Technologie Ag | Verfahren zur Herstellung von Zylindern oder Zylinderblöcken |
| JPH0671409A (ja) * | 1992-08-28 | 1994-03-15 | Ryobi Ltd | 水冷シリンダブロック鋳造用金型 |
| DE4434576A1 (de) * | 1994-08-09 | 1996-02-15 | Ks Aluminium Technologie Ag | Verbundgußzylinder oder -zylinderblock |
| DE4441735C2 (de) * | 1994-11-23 | 2003-08-21 | Hugo Kunz | Druckgießkolben, insbesondere für Kaltkammer-Druckgießmaschinen |
| DE19532252C2 (de) * | 1995-09-01 | 1999-12-02 | Erbsloeh Ag | Verfahren zur Herstellung von Laufbuchsen |
| DE19533529C2 (de) * | 1995-09-11 | 2001-10-11 | Vaw Alucast Gmbh | Verfahren zum Gießen eines Motorblockes aus Aluminium |
-
1997
- 1997-07-24 DE DE19731804A patent/DE19731804A1/de not_active Withdrawn
-
1998
- 1998-06-18 DE DE59803969T patent/DE59803969D1/de not_active Expired - Lifetime
- 1998-06-18 EP EP98111215A patent/EP0893182B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19731804A1 (de) | 1999-01-28 |
| EP0893182A1 (de) | 1999-01-27 |
| DE59803969D1 (de) | 2002-06-06 |
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