EP1321229B1 - Method for forming a bore - Google Patents

Method for forming a bore Download PDF

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Publication number
EP1321229B1
EP1321229B1 EP01130399A EP01130399A EP1321229B1 EP 1321229 B1 EP1321229 B1 EP 1321229B1 EP 01130399 A EP01130399 A EP 01130399A EP 01130399 A EP01130399 A EP 01130399A EP 1321229 B1 EP1321229 B1 EP 1321229B1
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EP
European Patent Office
Prior art keywords
deformation
bore
determined
honing
starting form
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
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EP01130399A
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German (de)
French (fr)
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EP1321229A1 (en
Inventor
Ulrich Dipl.-Ing. Klink
Gerhard Dipl.-Ing. Flores
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Gehring GmbH and Co KG
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Gehring GmbH and Co KG
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Publication date
Application filed by Gehring GmbH and Co KG filed Critical Gehring GmbH and Co KG
Priority to DE50114827.2T priority Critical patent/DE50114827C5/en
Priority to EP01130399A priority patent/EP1321229B1/en
Priority to JP2002364233A priority patent/JP2003200340A/en
Priority to US10/248,087 priority patent/US20030120374A1/en
Publication of EP1321229A1 publication Critical patent/EP1321229A1/en
Priority to US10/711,138 priority patent/US6973367B2/en
Application granted granted Critical
Publication of EP1321229B1 publication Critical patent/EP1321229B1/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B24B33/088—Honing tools for holes having a shape other than cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes

Definitions

  • the invention relates to a method of the type specified in the preamble of claim 1.
  • the DE-A-40 07 121 describes the honing of oval holes, as they are provided for example in cylinder blocks, in view of the thin webs ("fire bars") between adjacent holes also in the direction perpendicular to thinner walls and thus achieve a more uniform heat distribution. Instructions for solving the above problem do not arise from this.
  • the invention has for its object to provide a method of the generic type, which allows the production of holes with an ideal operating condition under deformation form with little effort. Furthermore, the object of the invention is to provide a honing machine for carrying out the method.
  • the method provides to determine the deformation in the operating state for a particular hole and to determine from the deformation the initial shape, ie the shape to be produced during machining, which corresponds to the shape before installation.
  • the determination of the deformation and the initial shape must be carried out only once per bore geometry and operating state. In particular, for the production of series components thereby reduces the cost compared to the distortion and heating of each hole during processing considerably. Because the deformation state does not have to be present on the machine itself, this can be determined much more accurate, so that the production of holes, which actually have a predetermined geometry in the operating state, is possible.
  • the desired shape i. the mold is cylindrical under operating conditions.
  • the initial shape is cylindrical.
  • the initial shape is determined theoretically.
  • the deformation is expediently determined experimentally.
  • the deformation is determined by static compression and measuring the geometry obtained.
  • the deformation can also be determined theoretically, in particular by computer simulation.
  • the initial shape is produced by temporally and spatially varied machining parameters.
  • the initial shape can be produced by methods with a defined cutting edge, grinding, spark erosion or honing.
  • the machining process is in particular a honing process, the tool being a honing tool which is arranged on a spindle and which comprises at least one honing stone which is pressed against the wall of the bore with a feed pressure.
  • the delivery pressure of at least one honing stone during the processing time is varied.
  • the delivery pressure is varied in particular as a function of the rotational position of the spindle.
  • different bore inner radii can be achieved in the circumferential direction of the bore.
  • the delivery pressure is varied depending on the stroke position of the spindle, resulting in different bore inner radii seen in the axial direction of the bore.
  • the initial shape 2 is the shape of the hole 1 before installation.
  • the initial shape 2 is largely cylindrical in an upper region 5 and elliptical in a lower region 7.
  • the representation of the deviation of the elliptical from the cylindrical shape is in the Fig. 1 and 2 not to scale, but shown greatly enlarged. In fact, the deviation is in the range of about 8 to 60 microns.
  • the central region 6 represents a transition region from the cylindrical cross-sectional shape 8 to the elliptical cross-sectional shape 9.
  • the cylindrical cross-sectional shape 8 is in Fig. 3 illustrated and the elliptical cross-sectional shape 9 in Fig. 4 ,
  • the deformation of the desired shape 3 is determined in the operating state.
  • the deformation can be determined experimentally by static distortion.
  • the hole is machined by honing. The hole is then exposed to the stresses that occur during operation.
  • the cylinder bore to be braced by the cylinder head, wherein the expansion screws used for fixing are tightened with the intended operating torques using the original seals.
  • the component can be heated to operating temperature and / or pressure can be applied with pressures prevailing in the operating state.
  • the resulting form softening is determined by form test measurements.
  • the deformation can also be determined by the dynamic measurement of the change in shape during operation. Dynamic measurement is performed on cylinder bores, in particular during firing.
  • the deformation can also be determined theoretically, in particular by a computer simulation. The computer simulation simulates the deformation during the fired operation with all detectable influencing variables.
  • the method by which the deformation is determined is selected depending on the required accuracy and the effort required for the determination.
  • the initial shape 2 is determined theoretically.
  • the initial shape 2 is then produced by means of a machining process, in particular by means of a honing process.
  • the honing machine for machining the hole comprises one to four honing stones.
  • the delivery pressure with which each honing stone is pressed against the wall of the bore 1 is separate for each honing stone controllable.
  • the honing tool performs an oscillating movement in the direction of the axis 4 of the bore 1 and a rotational movement about the axis 4.
  • To edit the upper portion 5 of the hole 1 all honing stones are pressed with the same feed pressure against the wall of the hole 1.
  • the delivery pressure is not varied over the processing time. This creates the in Fig.
  • the feed pressure is increased to the honing stones in the direction of the X-axis and reduced in the direction of the Y-axis.
  • the feed pressure is additionally controlled in dependence on the stroke position of the spindle on which the honing tool is fixed. Since the bore geometry changes continuously in the middle region 6, honing stones with very little axial extension are used. To achieve greater accuracy, the tool has a lower and / or an upper guide.
  • the in Fig. 5 represented contour represent the initial shape and resulting from the load bore shape in the Fig. 1 and 2 have shown contour, which then represents the desired shape.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft ein Verfahren der im Oberbegriff des Anspruchs 1 angegebenen Gattung.The invention relates to a method of the type specified in the preamble of claim 1.

Insbesondere bei Zylinderbohrungen von Hubkolbenmaschinen wie Verbrennungsmotoren oder Kompressoren wird versucht, durch ein gleichmäßiges und geringes Spiel zwischen Kolben und Zylinder gute tribologische Bedingungen zu erhalten. Da sich die Zylinderbohrung aufgrund der Belastungen wie Spannungen und Temperatur im Betriebszustand verformt, weicht die Form einer in unbelastetem Zustand zylindrischen Bohrung im Betrieb von der zylindrischen Form ab.Particularly in cylinder bores of reciprocating engines such as internal combustion engines or compressors is trying to obtain good tribological conditions by a uniform and low clearance between the piston and cylinder. Since the cylinder bore deforms due to the stresses such as stresses and temperature in the operating state, the shape of a cylindrical bore in the unloaded state deviates in operation from the cylindrical shape.

Um im Betriebszustand eine zylindrische Bohrung zu erhalten, wird in der Druckschrift JP 11267960 vorgeschlagen, die Bohrung bei der Bearbeitung mit Originaldehnschrauben und Originaldrehmomenten wie im Betriebszustand zu verspannen. Um zusätzlich die Verformung durch Temperatureinwirkung zu simulieren, ist bekannt, das Werkstück mittels heißem Honöl aufzuheizen. Diese Verfahren verursachen jedoch einen großen Aufwand bei der Herstellung der Bohrung durch die benötigten Vorrichtungen. Diese Bearbeitung verursacht hohe Kosten. Wegen der verhältnismäßig langen Aufheizzeit auf Temperaturen von ca. 80° C bis 140° C, den benötigten Sicherheitseinrichtungen, dem Dichtungsverschleiß und der benötigten Temperierung wird dieses Verfahren nur für die Einzelfertigung von hochwertigen Motoren eingesetzt. Der tatsächliche Verformungszustand im Betrieb wird außerdem durch die genannten Vorrichtungen nur unzureichend simuliert.In order to obtain a cylindrical bore in the operating state, is in the document JP 11267960 proposed to clamp the bore during machining with original expansion screws and original torques as in the operating state. In order to additionally simulate the deformation due to the effect of temperature, it is known to heat the workpiece by means of hot honing oil. However, these methods cause a great deal of effort in the production of the hole through the required devices. This processing causes high costs. Because of the relatively long heating time to temperatures of about 80 ° C to 140 ° C, the required safety devices, the seal wear and the required temperature, this method is used only for the individual production of high-quality engines. The actual state of deformation in operation is also insufficiently simulated by the said devices.

Die DE-A-40 07 121 beschreibt das Honen von Ovalbohrungen, wie sie zum Beispiel in Zylinderblöcken vorgesehen werden, um in Anbetracht der dünnen Stege ("Feuerstege") zwischen benachbarten Bohrungen auch in der Richtung senkrecht dazu dünnere Wandungen und damit eine gleichmäßigere Wärmeverteilung zu erreichen. Hinweise zur Lösung des o. g. Problems ergeben sich daraus nicht.The DE-A-40 07 121 describes the honing of oval holes, as they are provided for example in cylinder blocks, in view of the thin webs ("fire bars") between adjacent holes also in the direction perpendicular to thinner walls and thus achieve a more uniform heat distribution. Instructions for solving the above problem do not arise from this.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art zu schaffen, das die Herstellung von Bohrungen mit einer im Betriebszustand unter Verformung idealen Form mit geringem Aufwand ermöglicht. Des Weiteren besteht die Aufgabe der Erfindung darin, eine Honmaschine zur Durchführung des Verfahrens zu schaffen.The invention has for its object to provide a method of the generic type, which allows the production of holes with an ideal operating condition under deformation form with little effort. Furthermore, the object of the invention is to provide a honing machine for carrying out the method.

Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a method having the features of claim 1.

Das Verfahren sieht vor, für eine bestimmte Bohrung die Verformung im Betriebszustand zu ermitteln und aus der Verformung die Ausgangsform, d. h. die bei der Bearbeitung herzustellende Form, die der Form vor dem Einbau entspricht, zu ermitteln. Die Ermittlung der Verformung und der Ausgangsform muss je Bohrungsgeometrie und Betriebszustand lediglich einmal durchgeführt werden. Insbesondere für die Herstellung von Serienbauteilen sinkt dadurch der Aufwand gegenüber dem Verspannen und Erhitzen jeder Bohrung bei der Bearbeitung erheblich. Da der Verformungszustand nicht an der Bearbeitungsmaschine selbst vorliegen muß, kann dieser wesentlich genauer ermittelt werden, so daß die Fertigung von Bohrungen, die im Betriebszustand tatsächlich eine vorgegebene Geometrie haben, ermöglicht ist.The method provides to determine the deformation in the operating state for a particular hole and to determine from the deformation the initial shape, ie the shape to be produced during machining, which corresponds to the shape before installation. The determination of the deformation and the initial shape must be carried out only once per bore geometry and operating state. In particular, for the production of series components thereby reduces the cost compared to the distortion and heating of each hole during processing considerably. Because the deformation state does not have to be present on the machine itself, this can be determined much more accurate, so that the production of holes, which actually have a predetermined geometry in the operating state, is possible.

In Ausgestaltung der Erfindung ist vorgesehen, daß die Sollform, d.h. die Form unter Betriebsbedingungen, zylindrisch ist. Eine andere Ausgestaltungsvariante sieht vor, daß die Ausgangsform zylindrisch ist. Insbesondere bei zylindrischer Sollform ist vorgesehen, daß die Ausgangsform theoretisch ermittelt wird.In an embodiment of the invention it is provided that the desired shape, i. the mold is cylindrical under operating conditions. Another embodiment variant provides that the initial shape is cylindrical. In particular, in the case of a cylindrical nominal shape, it is provided that the initial shape is determined theoretically.

Zweckmäßig wird die Verformung experimentell ermittelt. Insbesondere wird die Verformung durch statisches Verpressen und Vermessen der erzielten Geometrie ermittelt. Um besonders genaue Verformungsdaten zu erhalten, kann es jedoch vorteilhaft sein, daß die Verformung durch dynamisches Vermessen im Betrieb ermittelt wird. Die Verformung kann auch theoretisch ermittelt werden, insbesondere durch Rechnersimulation.The deformation is expediently determined experimentally. In particular, the deformation is determined by static compression and measuring the geometry obtained. In order to obtain particularly accurate deformation data, however, it may be advantageous for the deformation to be determined by dynamic measurement during operation. The deformation can also be determined theoretically, in particular by computer simulation.

Es ist vorgesehen, daß die Ausgangsform durch zeitlich und örtlich variierte Bearbeitungsparameter hergestellt wird. Grundsätzlich läßt sich die Ausgangsform durch Verfahren mit definierter Schneide, Schleifen, Funkenerosion oder Honen herstellen. Das Bearbeitungsverfahren ist jedoch insbesondere ein Honverfahren, wobei das Werkzeug ein Honwerkzeug ist, das an einer Spindel angeordnet ist und das mindestens einen Honstein umfaßt, der mit einem Zustelldruck an die Wandung der Bohrung gedrückt wird. Es ist vorgesehen, daß der Zustelldruck mindestens eines Honsteins während der Bearbeitungszeit variiert wird. Der Zustelldruck wird insbesondere in Abhängigkeit der Drehposition der Spindel variiert. Hierdurch können in Umfangsrichtung der Bohrung unterschiedliche Bohrungsinnenradien erzielt werden. Zweckmäßig wird der Zustelldruck in Abhängigkeit der Hubposition der Spindel variiert, wodurch sich in Achsrichtung der Bohrung gesehen unterschiedliche Bohrungsinnenradien ergeben.It is envisaged that the initial shape is produced by temporally and spatially varied machining parameters. In principle, the initial shape can be produced by methods with a defined cutting edge, grinding, spark erosion or honing. However, the machining process is in particular a honing process, the tool being a honing tool which is arranged on a spindle and which comprises at least one honing stone which is pressed against the wall of the bore with a feed pressure. It is envisaged that the delivery pressure of at least one honing stone during the processing time is varied. The delivery pressure is varied in particular as a function of the rotational position of the spindle. As a result, different bore inner radii can be achieved in the circumferential direction of the bore. Appropriately, the delivery pressure is varied depending on the stroke position of the spindle, resulting in different bore inner radii seen in the axial direction of the bore.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnung erläutert. Es zeigen:

Fig. 1
einen Schnitt durch eine Bohrung mit Ausgangsform,
Fig. 2
einen Schnitt entlang der Linie II-II in Fig. 1,
Fig. 3
eine schematische Darstellung eines Schnitts entlang der Linie III-III oder III'-III' in Fig. 1,
Fig. 4
eine schematische Darstellung eines Schnitts entlang der Linie IV-IV oder IV'-IV' in Fig. 1,
Fig. 5
einen Schnitt durch eine Bohrung in Sollform (Betriebsform).
An embodiment of the invention will be explained below with reference to the drawing. Show it:
Fig. 1
a section through a hole with initial shape,
Fig. 2
a section along the line II-II in Fig. 1 .
Fig. 3
a schematic representation of a section along the line III-III or III'-III 'in Fig. 1 .
Fig. 4
a schematic representation of a section along the line IV-IV or IV'-IV 'in Fig. 1 .
Fig. 5
a section through a hole in nominal form (operating form).

Zur Herstellung einer Bohrung 1 mit der in Fig. 5 dargestellten zylindrischen Sollform 3, die sich durch Verformungen im Betriebszustand ergibt, wird zunächst die in den Fig. 1 und 2 dargestellte Ausgangsform 2 der Bohrung 1 ermittelt. Die Ausgangsform 2 ist die Form der Bohrung 1 vor dem Einbau. Die Ausgangsform 2 ist in einem oberen Bereich 5 weitgehend zylindrisch und in einem unteren Bereich 7 elliptisch. Die Darstellung der Abweichung der elliptischen von der zylindrischen Form ist in den Fig. 1 und 2 nicht maßstabsgetreu, sondern stark vergrößert dargestellt. Tatsächlich liegt die Abweichung im Bereich von ca. 8 bis 60 µm. Der mittlere Bereich 6 stellt einen Übergangsbereich von der zylindrischen Querschnittsform 8 auf die elliptische Querschnittsform 9 dar. Die zylindrische Querschnittsform 8 ist in Fig. 3 dargestellt und die elliptische Querschnittsform 9 in Fig. 4.To make a hole 1 with the in Fig. 5 shown cylindrical nominal shape 3, which results from deformations in the operating state, the first in the Fig. 1 and 2 illustrated output form 2 of the bore 1 determined. The initial shape 2 is the shape of the hole 1 before installation. The initial shape 2 is largely cylindrical in an upper region 5 and elliptical in a lower region 7. The representation of the deviation of the elliptical from the cylindrical shape is in the Fig. 1 and 2 not to scale, but shown greatly enlarged. In fact, the deviation is in the range of about 8 to 60 microns. The central region 6 represents a transition region from the cylindrical cross-sectional shape 8 to the elliptical cross-sectional shape 9. The cylindrical cross-sectional shape 8 is in Fig. 3 illustrated and the elliptical cross-sectional shape 9 in Fig. 4 ,

Zur Ermittlung der Ausgangsform 2 wird die Verformung der Sollform 3 im Betriebszustand ermittelt. Die Verformung kann experimentell durch statisches Verspannen ermittelt werden. Hierzu wird eine Bohrung, insbesondere die Zylinderbohrung eines Motorblocks, in Sollform 3, insbesondere in zylindrischer Form, hergestellt. Zweckmäßig wird die Bohrung durch Honen bearbeitet. Die Bohrung wird dann den Belastungen ausgesetzt, die im Betriebszustand auftreten. Hierzu kann beispielsweise die Zylinderbohrung durch den Zylinderkopf verspannt werden, wobei die zur Fixierung verwendeten Dehnschrauben mit den für den Betrieb vorgesehenen Drehmomenten unter Verwendung der Originaldichtungen angezogen werden. Je nach Betriebszustand und erforderlicher Genauigkeit kann zusätzlich oder alternativ dazu das Bauteil auf Betriebstemperatur aufgeheizt werden und/oder eine Druckbeaufschlagung mit im Betriebszustand vorherrschenden Drücken erfolgen. Die so entstandenen Formerweichungen werden durch Formtestermessungen ermittelt.To determine the initial shape 2, the deformation of the desired shape 3 is determined in the operating state. The deformation can be determined experimentally by static distortion. For this purpose, a bore, in particular the cylinder bore of an engine block, in nominal form 3, in particular in a cylindrical shape, produced. Appropriately, the hole is machined by honing. The hole is then exposed to the stresses that occur during operation. For this purpose, for example the cylinder bore to be braced by the cylinder head, wherein the expansion screws used for fixing are tightened with the intended operating torques using the original seals. Depending on the operating state and required accuracy, in addition or as an alternative to this, the component can be heated to operating temperature and / or pressure can be applied with pressures prevailing in the operating state. The resulting form softening is determined by form test measurements.

Die Verformung kann jedoch auch durch die dynamische Vermessung der Formänderung im Betriebszustand ermittelt werden. Die dynamische Vermessung wird bei Zylinderbohrungen insbesondere während der Befeuerung vorgenommen. Die Verformung kann auch theoretisch, insbesondere durch eine Rechnersimulation ermittelt werden. Die Rechnersimulation simuliert die Verformung während des befeuerten Betriebs mit allen erfassbaren Einflussgrößen. Zweckmäßig wird das Verfahren, mit dem die Verformung ermittelt wird, in Abhängigkeit der benötigten Genauigkeit und des für die Ermittlung notwendigen Aufwands ausgewählt.However, the deformation can also be determined by the dynamic measurement of the change in shape during operation. Dynamic measurement is performed on cylinder bores, in particular during firing. The deformation can also be determined theoretically, in particular by a computer simulation. The computer simulation simulates the deformation during the fired operation with all detectable influencing variables. Suitably, the method by which the deformation is determined is selected depending on the required accuracy and the effort required for the determination.

Aus der ermittelten Verformung und der Sollform 3 wird die Ausgangsform 2 theoretisch ermittelt. Die Ausgangsform 2 wird dann mittels eines Bearbeitungsverfahrens, insbesondere mittels eines Honverfahrens, hergestellt. Die Honmaschine zur Bearbeitung der Bohrung umfaßt ein bis vier Honsteine. Der Zustelldruck, mit dem jeder Honstein an die Wandung der Bohrung 1 gedrückt wird, ist für jeden Honstein separat steuerbar. Das Honwerkzeug führt eine oszillierende Bewegung in Richtung der Achse 4 der Bohrung 1 und eine Drehbewegung um die Achse 4 aus. Zur Bearbeitung des oberen Bereichs 5 der Bohrung 1 werden alle Honsteine mit dem gleichen Zustelldruck gegen die Wandung der Bohrung 1 gedrückt. Der Zustelldruck wird über die Bearbeitungsdauer nicht variiert. Dadurch entsteht die in Fig. 3 dargestellte zylindrische Querschnittsform 8. Zur Herstellung der elliptischen Querschnittsform 9, die in Fig. 4 dargestellt ist, wird der Zustelldruck auf die Honsteine in Richtung der X-Achse vergrößert und in Richtung der Y-Achse vermindert. Im mittleren Bereich 6 wird der Zustelldruck zusätzlich in Abhängigkeit der Hubposition der Spindel, an der das Honwerkzeug fixiert ist, gesteuert. Da sich die Bohrungsgeometrie im mittleren Bereich 6 kontinuierlich ändert, kommen Honsteine mit sehr geringer axialer Streckung zum Einsatz. Zur Erzielung einer größeren Genauigkeit weist das Werkzeug eine untere und/oder eine obere Führung auf.From the determined deformation and the desired shape 3, the initial shape 2 is determined theoretically. The initial shape 2 is then produced by means of a machining process, in particular by means of a honing process. The honing machine for machining the hole comprises one to four honing stones. The delivery pressure with which each honing stone is pressed against the wall of the bore 1 is separate for each honing stone controllable. The honing tool performs an oscillating movement in the direction of the axis 4 of the bore 1 and a rotational movement about the axis 4. To edit the upper portion 5 of the hole 1 all honing stones are pressed with the same feed pressure against the wall of the hole 1. The delivery pressure is not varied over the processing time. This creates the in Fig. 3 shown cylindrical cross-sectional shape 8. For the preparation of the elliptical cross-sectional shape 9, the Fig. 4 is shown, the feed pressure is increased to the honing stones in the direction of the X-axis and reduced in the direction of the Y-axis. In the central region 6, the feed pressure is additionally controlled in dependence on the stroke position of the spindle on which the honing tool is fixed. Since the bore geometry changes continuously in the middle region 6, honing stones with very little axial extension are used. To achieve greater accuracy, the tool has a lower and / or an upper guide.

Werden Bohrungen benötigt, die eine von der zylindrischen Form abweichende Innenkontur aufweisen, kann die in Fig. 5 dargestellte Kontur die Ausgangsform darstellen und die sich durch die Belastung ergebende Bohrungsform die in den Fig. 1 und 2 dargestellte Kontur haben, die dann die Sollform darstellt.If holes are needed which have a different from the cylindrical shape inner contour, the in Fig. 5 represented contour represent the initial shape and resulting from the load bore shape in the Fig. 1 and 2 have shown contour, which then represents the desired shape.

Grundsätzlich können auch andere Fertigungsverfahren, die die Herstellung einer von der Zylinderform abweichenden Innenkontur erlauben, bei der Herstellung einer Bohrung mit dem erfindungsgemäßen Verfahren zur Anwendung kommen.In principle, other production methods which permit the production of an inner contour deviating from the cylindrical shape can also be used in the production of a bore using the method according to the invention.

Claims (13)

  1. Method for creating a bore, in particular the cylinder bore of a reciprocating piston engine, wherein, in the unloaded condition, the bore (1) has a starting form (2) and, in the operating condition, a target form (3) which differs from the starting form (2), characterised in that the deformation of a bore (1) to the target form (3) in the operating condition is determined, the starting form (2) is determined by means of the target form (3) and the deformation, and the bore (1) is brought into the starting form (2) with a processing method.
  2. Method according to claim 1, characterised in that the target form (3) or the starting form (2) is cylindrical.
  3. Method according to claim 1 or 2, characterised in that the starting form (2) is determined theoretically.
  4. Method according to one of the claims 1 to 3, characterised in that the deformation is determined experimentally.
  5. Method according to claim 4, characterised in that the deformation is determined by means of static pressing and measurement of the geometry obtained.
  6. Method according to claim 4, characterised in that the deformation takes place by means of heating to the operating temperature.
  7. Method according to claim 4, characterised in that the deformation is determined by dynamic measurement in operation.
  8. Method according to one of the claims 1 to 3, characterised in that the deformation is determined theoretically, in particular by computer simulation.
  9. Method according to one of the claims 1 to 8, characterised in that the starting form (2) is created by processing parameters which are varied temporally and spatially.
  10. Method according to one of the claims 1 to 9, characterised in that the processing method is a honing process wherein the tool is a honing tool which is arranged on a spindle and which comprises at least one honing stone which is pressed with a feed pressure against the wall of the bore (1).
  11. Method according to claim 10, characterised in that the feed pressure of at least one honing stone is varied during the processing time.
  12. Method according to claim 11, characterised in that the feed pressure is varied depending on the rotary position of the spindle.
  13. Method according to claim 11 or 12, characterised in that the feed pressure is varied depending on the stroke position of the spindle.
EP01130399A 2001-12-20 2001-12-20 Method for forming a bore Expired - Lifetime EP1321229B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50114827.2T DE50114827C5 (en) 2001-12-20 2001-12-20 Method of making a bore
EP01130399A EP1321229B1 (en) 2001-12-20 2001-12-20 Method for forming a bore
JP2002364233A JP2003200340A (en) 2001-12-20 2002-12-16 Forming method of bore and honing machine for implementing the method
US10/248,087 US20030120374A1 (en) 2001-12-20 2002-12-17 Method for Producing a Bore
US10/711,138 US6973367B2 (en) 2001-12-20 2004-08-27 Method for producing a bore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01130399A EP1321229B1 (en) 2001-12-20 2001-12-20 Method for forming a bore

Publications (2)

Publication Number Publication Date
EP1321229A1 EP1321229A1 (en) 2003-06-25
EP1321229B1 true EP1321229B1 (en) 2009-04-08

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DE102014221363A1 (en) 2013-10-22 2015-04-23 Ford Global Technologies, Llc Method for producing a coated cylinder bore of an internal combustion engine
DE102013221375A1 (en) 2013-10-22 2015-04-23 Ford Global Technologies, Llc Method for producing a coated bore surface, in particular a cylinder bore

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DE102007038123B4 (en) 2007-08-04 2010-06-10 Gehring Technologies Gmbh Machine for producing non-cylindrical bore surfaces
DE102007063567A1 (en) 2007-12-31 2009-07-09 Daimler Ag Non-cylindrical drilling surface producing method for use during processing of cylindrical piston bore in cylinder block of internal combustion engine, involves performing position honing and uniformly smoothening surface
DE102008064592B4 (en) 2008-12-30 2014-08-28 Gehring Technologies Gmbh Device for producing a non-cylindrical inner surface of a bore
DE102009007023A1 (en) 2009-01-31 2010-08-05 Daimler Ag Boreholes i.e. cylinder boreholes for reciprocating piston engine, designing and producing method for use in e.g. passenger car, involves receiving cylinder contact surface by operational form based on preset mechanical and/or thermal load
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DE102015017348B4 (en) 2015-05-26 2024-07-11 Gehring Technologies Gmbh + Co. Kg Method for the conformation of a cylindrical bore and process chain for the shaping of cylindrical bores
DE102015209609B4 (en) * 2015-05-26 2024-05-16 Gehring Technologies Gmbh + Co. Kg Method for the conformation of a cylindrical bore and process chain for the shaping of cylindrical bores
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DE102014221363A1 (en) 2013-10-22 2015-04-23 Ford Global Technologies, Llc Method for producing a coated cylinder bore of an internal combustion engine
DE102013221375A1 (en) 2013-10-22 2015-04-23 Ford Global Technologies, Llc Method for producing a coated bore surface, in particular a cylinder bore
RU2674362C2 (en) * 2013-10-22 2018-12-07 Форд Глобал Технолоджис, ЛЛК Method for processing cylinder bore of internal combustion engine

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EP1321229A1 (en) 2003-06-25
JP2003200340A (en) 2003-07-15
US20030120374A1 (en) 2003-06-26
DE50114827C5 (en) 2017-05-24
DE50114827D1 (en) 2009-05-20

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