EP3290125B1 - Method for coating a cylinder wall, corresponding device and crankcase - Google Patents

Method for coating a cylinder wall, corresponding device and crankcase Download PDF

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Publication number
EP3290125B1
EP3290125B1 EP16186802.1A EP16186802A EP3290125B1 EP 3290125 B1 EP3290125 B1 EP 3290125B1 EP 16186802 A EP16186802 A EP 16186802A EP 3290125 B1 EP3290125 B1 EP 3290125B1
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EP
European Patent Office
Prior art keywords
coating
bore
protective ring
workpiece
ring
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.)
Active
Application number
EP16186802.1A
Other languages
German (de)
French (fr)
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EP3290125A1 (en
Inventor
Marc Kesting
Tobias Birkner
Ralf VÖLLINGER
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.)
Sturm Maschinen und Anlagenbau GmbH
Original Assignee
Sturm Maschinen und Anlagenbau 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 Sturm Maschinen und Anlagenbau GmbH filed Critical Sturm Maschinen und Anlagenbau GmbH
Priority to EP16186802.1A priority Critical patent/EP3290125B1/en
Priority to HUE16186802A priority patent/HUE048450T2/en
Publication of EP3290125A1 publication Critical patent/EP3290125A1/en
Application granted granted Critical
Publication of EP3290125B1 publication Critical patent/EP3290125B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/22—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc
    • B05B7/222—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc

Definitions

  • the invention relates to a method for coating a bore wall of a bore in a workpiece, in particular a cylinder bore in an engine block, in which a coating lance of a coating device is inserted into the bore from one side of the workpiece with the release of coating particles, the bore wall being provided with a coating is, according to the preamble of claim 1.
  • the invention also relates to a device according to the preamble of claim 11.
  • the invention further relates to an engine block with a base body, in which at least one cylinder bore is arranged on a support side, the support side being machined to form a flat sealing surface, according to the preamble of claim 12.
  • a generic method for coating a bore wall on an engine block is from the EP 3 047 914 A1 known.
  • a coating device is provided with a movable coating lance, through which a metal plasma jet is generated to form a coating of metal particles.
  • the coating lance is surrounded by an annular receiving unit which is placed on a flat machined sealing surface of the engine block to be machined.
  • the sleeve-shaped receiving unit serves to take up a so-called overspray on metal particles when the coating lance is moved into the bore to be coated. This is to prevent metal particles from settling on the engine block outside the cylinder bore to be coated, in particular on a flat sealing surface. Because such missing particles are to be removed in a complex manner after coating the cylinder bores, for example by machining the entire sealing surface of the engine block again.
  • the sealing surface is preferably used to place a cylinder head gasket.
  • a large part of the overspray can be reliably accommodated in the receiving unit even when an annular receiving device is placed on the engine block.
  • metal particles of the coating lance which leave the nozzle of the coating lance at supersonic speed, reach the sealing surface of the engine block.
  • the sealing surface of the engine block can be contaminated with metal particles despite the receiving unit. This may require repeated cleaning or machining of the sealing surface of the engine block. This additional processing step is associated with additional time and cost.
  • a contact side of the receiving unit can also be contaminated by metal particles. This can impair reliable placement of the receiving unit on the next engine block, which also requires additional cleaning steps on the receiving unit and the subsequent engine block.
  • the invention has for its object to provide a method for coating, a device therefor and an engine block, in which a particularly efficient and low-pollution coating of a bore wall is made possible.
  • a basic idea of the invention is to provide a protective ring on the entry side for the coating lance, which protrudes axially.
  • the metal particles from the coating lance leave it essentially in a radial direction.
  • the ring-shaped protective element thus prevents the metal particles from being shot directly onto the surface of the entry side.
  • the metal particles flying radially in the direction of the side thus accumulate on the protective ring and can therefore no longer reach the surface of the entry side.
  • the protective ring can be directly at the edge or radially spaced up to a few millimeters from it.
  • the protective ring is removed after coating. This means that the desired geometry of the workpiece is not affected by the protective ring.
  • the protective ring is formed directly on the workpiece.
  • the protective ring can be formed seamlessly when machining the engine block.
  • the protective ring is formed from a ductile material of the workpiece by non-cutting shaping.
  • the workpiece in particular an engine block for an internal combustion engine for vehicles, is made from a ductile metal material, in particular aluminum or steel.
  • a protective ring protruding toward the free sealing or support side can be formed by means of a non-cutting material displacement by means of a pressing pin or pressing mandrel, which is pressed into the material of the workpiece and moved in a circular manner along an upper edge of the cylinder bore to be coated.
  • the protective ring is thus formed in one piece on the workpiece.
  • Such a chipless forming process can be carried out simply and precisely.
  • the dimensioning of the protective ring depends on the respective workpiece and its dimensions. It is particularly preferred that the protective ring is formed with an axial length of 0.05 mm to 3 mm. In certain cases, different lengths can also be set.
  • the protective ring In principle, it is possible to form the protective ring with a certain radial distance from the inner wall of the bore to be coated. According to one embodiment variant of the invention, it is particularly advantageous that the protective ring is formed with an inner diameter which corresponds to an inner diameter of the bore. The protective ring thus represents a certain axial extension of the inner wall of the bore.
  • the protective ring and the bore wall are provided with the coating. Since the protective ring is an extension of the bore wall, a reliable coating of the bore wall up to the actually desired edge area is reliably produced. This ensures a particularly stable coating on the bore wall.
  • the protective ring is removed by machining after coating.
  • the desired geometry of the engine block, in particular a flat attachment side of the engine block, which is required in particular for a cylinder head gasket, is thus achieved.
  • this is preferably further improved in that a chamfer is formed on the edge of the bore when the protective ring is removed.
  • a chamfer particularly with a chamfer angle of 15 ° to 30 °, counteracts shearing of the coating particularly well.
  • Another preferred method variant according to the invention consists in that the side is machined flat before the protective ring is formed.
  • the plan processing is carried out in particular by machining, in particular by milling.
  • the final dimension of the engine block can already be preferred as no further cleaning of the side with a flat sealing surface is required.
  • the page can only be edited after or when the protective ring is removed. Due to the improved sealing effect of the protective ring during coating, a support ring of the coating device can be placed on a rougher surface.
  • the coating can be applied to the bore wall using any suitable coating method.
  • the coating is applied by means of plasma coating or thermal coating. Coating methods of this type allow the metal particles to adhere particularly well to a metallic bore wall.
  • the coating device is placed with a support ring on the side of the workpiece, the support ring abutting on the side and annularly enclosing an edge of the bore to be coated, and that the protective ring a butt joint between the Support ring and the side of the workpiece axially covered.
  • the protective ring can be a few tenths or a few millimeters, in extreme cases even a few centimeters from the butt joint.
  • the protective ring prevents the metal particles from shooting directly into the butt joint. As a result, both the flat sealing surface of the side and the support surface of the support ring of metal particles are kept clean. Metallic connection effects between the side and the support ring are also avoided, which can cause damage to the sealing surface or the support surface when the support ring is lifted off.
  • a pressing element which can be moved along an edge of a hole in a workpiece and pressed into the workpiece, one axially the above protective ring can be formed without cutting.
  • the pressing element is preferably pin-shaped as a pressing pin, which is preferably rotatably mounted.
  • the rotatable push pin can be fitted with a corresponding feed device by applying a corresponding radial directed force can be moved along the edge of the bore. This creates a certain indentation, whereby the material that is displaced in this way creates the desired axially protruding protective ring at the edge of the bore.
  • a generally known CNC milling machine or a CNC machining center can be used as the feed device, but instead of a cutting milling head, the pin-shaped pressing element designed according to the invention is used. This can be rotated actively by a driven spindle on the feed device or passively by rolling on the workpiece.
  • a protective ring axially protruding from the sealing surface is integrally formed on the base body at an edge of the at least one cylinder bore on the attachment side.
  • the engine block can be the end workpiece or preferably an intermediate shape.
  • the protective ring is produced without cutting before coating the cylinder bore.
  • An advantageous embodiment of the invention consists in that the at least one protective ring is formed from the base body by non-cutting shaping after machining the sealing surface.
  • the chipless forming can be effected in particular by a pressing process.
  • an annular groove is formed in the wall of the hole at an upper edge region of the hole. This results in a material displacement, which leads to the formation or axial bulging of the protective ring along the edge of the bore on the free support side.
  • the protective ring formed in this way, together with the pressed-in groove at the upper edge of the bore can be removed by machining, in particular by chamfering.
  • FIG Fig. 1 A workpiece 10 to be coated with at least one bore 12 with a bore wall 14 to be coated is shown in FIG Fig. 1 shown.
  • a base body 11 of the metallic workpiece 10 which is preferably designed as an engine block of an internal combustion engine, a plurality of bores 12 can be provided as cylinder bores.
  • the workpiece 10 has a flat machined side 16 on an upper side, which is used, for example, to accommodate a flat gasket, in particular a cylinder head gasket.
  • an annular groove 22 is pressed into the bore wall 14 near the side 16 at an upper edge region of the bore 12.
  • the chipless pressing of the groove 22 leads to a material displacement due to the ductile metallic material of the base body 11.
  • the material displacement can be generated in a targeted manner to form an axially protruding guard ring 20 at the upper edge of the bore 12 by appropriately designing a pushing device with a movable spike and with support surfaces on the bore wall 14.
  • the dimensioning of the protective ring 20 depends on the size of the groove 22 and the material displacement caused thereby.
  • the axial length and radial width of the guard ring 20 can range from a few tenths of a millimeter to a few millimeters.
  • Appropriate support elements or support rings of the provided pushing device allow the protective ring to be designed in a targeted manner by the displaced material.
  • a coating device 50 with an approximately cylindrical housing 54 and a centric support ring 56 placed.
  • the support ring 56 has a flat support surface 58 on its underside.
  • An inner diameter of the support ring 56 is preferably slightly larger than an outer diameter of the formed protective ring 20.
  • the axially protruding protective ring 20 in a radial direction provides coverage or protection of the butt joint 5 against radial penetration of plasma particles.
  • a rod-shaped coating lance 52 is axially extended from the cylindrical housing 54 of the coating device 50.
  • the coating lance 52 is preferably already in the housing 54 in a spraying operation, with molten metal particles escaping at a lower end of the coating lance 52 at high speed, which is caused by spray jets 53 in Fig. 3 is made clear. It can be seen that the butt joint 5 is in a spray shadow which is formed by the axially protruding guard ring 20. This reliably prevents plasma particles from entering the butt joint 5 and contaminating the side 16 of the workpiece 10 or the bearing surface 58 of the bearing ring 56.
  • a beveled deflection surface 59 is provided on an inside of the support ring 56, through which metal particles of the plasma jet are deflected axially in the direction of the interior of the housing 54.
  • the housing 54 is designed to accommodate such metal particles and can be replaced at certain intervals for emptying.
  • the coating lance 52 moves into the bore 12, the coating lance 52 being rotated.
  • a coating 30 is specifically formed on the bore wall 14, as in FIG Fig. 4 is shown.
  • the coating lance 52 is withdrawn from the bore 12 and the coating device as a whole is removed from the workpiece 10.
  • the axially protruding guard ring 20 can be removed by machining. It can be on the edge of Coating 30 a bevel or chamfer 32 are formed. The area with the groove 22 can also be removed, if this should be necessary.
  • a final planar processing of the side 16 of the workpiece 10 is not necessary or at most to a very limited extent in the method according to the invention.
  • a part of a device 40 according to the invention for machining a bore wall 14 of a bore 12 in a workpiece 10 is shown in a highly schematic manner.
  • the device 40 has a pin-shaped pressing element 42 which is rotatably driven in an infeed unit 44. With the infeed unit 44, the pressing element 42 can be moved in a circular manner along the edge of the bore 12, a recess being formed. Due to the displaced material 21 of the indentation, a protective ring 20 is formed on the upper edge of the bore 12.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Beschichten einer Bohrungswand einer Bohrung in einem Werkstück, insbesondere einer Zylinderbohrung in einem Motorblock, bei dem eine Beschichtungslanze einer Beschichtungsvorrichtung unter Abgabe von Beschichtungspartikeln in die Bohrung von einer Seite des Werkstücks eingefahren wird, wobei die Bohrungswand mit einer Beschichtung versehen wird, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for coating a bore wall of a bore in a workpiece, in particular a cylinder bore in an engine block, in which a coating lance of a coating device is inserted into the bore from one side of the workpiece with the release of coating particles, the bore wall being provided with a coating is, according to the preamble of claim 1.

Die Erfindung betrifft auch eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 11.The invention also relates to a device according to the preamble of claim 11.

Die Erfindung betrifft weiterhin einen Motorblock mit einem Grundkörper, in welchem an einer Auflageseite mindestens eine Zylinderbohrung angeordnet ist, wobei die Auflageseite zum Bilden einer planen Dichtfläche bearbeitet ist, gemäß dem Oberbegriff des Anspruchs 12.The invention further relates to an engine block with a base body, in which at least one cylinder bore is arranged on a support side, the support side being machined to form a flat sealing surface, according to the preamble of claim 12.

Ein gattungsgemäßes Verfahren zum Beschichten einer Bohrungswand an einem Motorblock ist aus der EP 3 047 914 A1 bekannt. Dabei ist eine Beschichtungsvorrichtung mit einer verfahrbaren Beschichtungslanze vorgesehen, durch welche ein Metall-Plasmastrahl zum Bilden einer Beschichtung aus Metallpartikeln erzeugt wird. Die Beschichtungslanze ist von einer ringförmigen Aufnahmeeinheit umgeben, welche auf einer plan bearbeiteten Dichtfläche des zu bearbeitenden Motorblocks aufgesetzt wird. Die hülsenförmige Aufnahmeeinheit dient dazu, einen sogenannten Overspray an Metallpartikeln beim Einfahren der Beschichtungslanze in die zu beschichtende Bohrung aufzunehmen. Hierdurch soll verhindert werden, dass sich Metallpartikel an dem Motorblock außerhalb der zu beschichtenden Zylinderbohrung, insbesondere auf einer ebenen Dichtfläche, absetzen. Denn derartige Fehlpartikel sind nach der Beschichtung der Zylinderbohrungen in aufwändiger Weise zu entfernen, etwa durch eine nochmalige spanabhebende Bearbeitung der gesamten Dichtfläche des Motorblocks. Die Dichtfläche dient vorzugsweise einem Auflegen einer Zylinderkopfdichtung.A generic method for coating a bore wall on an engine block is from the EP 3 047 914 A1 known. A coating device is provided with a movable coating lance, through which a metal plasma jet is generated to form a coating of metal particles. The coating lance is surrounded by an annular receiving unit which is placed on a flat machined sealing surface of the engine block to be machined. The sleeve-shaped receiving unit serves to take up a so-called overspray on metal particles when the coating lance is moved into the bore to be coated. This is to prevent metal particles from settling on the engine block outside the cylinder bore to be coated, in particular on a flat sealing surface. Because such missing particles are to be removed in a complex manner after coating the cylinder bores, for example by machining the entire sealing surface of the engine block again. The sealing surface is preferably used to place a cylinder head gasket.

Selbst beim Aufsetzen einer ringförmigen Aufnahmeeinrichtung auf Stoß auf den Motorblock kann zwar ein Großteil des Oversprays zuverlässig in der Aufnahmeeinheit aufgenommen. Es hat sich jedoch gezeigt, dass in bestimmten Fällen Metallpartikel der Beschichtungslanze, welche mit Überschallgeschwindigkeit die Düse der Beschichtungslanze verlassen, auf die Dichtfläche des Motorblocks gelangen. Hierdurch kann trotz der Aufnahmeeinheit die Dichtfläche des Motorblocks mit Metallpartikeln verschmutzt werden. Dies kann eine abermalige Reinigung oder nochmalige spanabhebende Bearbeitung der Dichtfläche des Motorblocks erfordern. Dieser zusätzliche Bearbeitungsschritt ist mit zusätzlichem Zeit- und Kostenaufwand verbunden.A large part of the overspray can be reliably accommodated in the receiving unit even when an annular receiving device is placed on the engine block. However, it has been shown that in certain cases metal particles of the coating lance, which leave the nozzle of the coating lance at supersonic speed, reach the sealing surface of the engine block. As a result, the sealing surface of the engine block can be contaminated with metal particles despite the receiving unit. This may require repeated cleaning or machining of the sealing surface of the engine block. This additional processing step is associated with additional time and cost.

Zudem kann auch eine Kontaktseite der Aufnahmeeinheit durch Metallpartikel verschmutzt werden. Dies kann ein zuverlässiges Anlegen der Aufnahmeeinheit an den nächsten Motorblock beeinträchtigen, was ebenfalls zusätzliche Reinigungsschritte an der Aufnahmeeinheit und dem nachfolgenden Motorblock erforderlich macht.In addition, a contact side of the receiving unit can also be contaminated by metal particles. This can impair reliable placement of the receiving unit on the next engine block, which also requires additional cleaning steps on the receiving unit and the subsequent engine block.

Aus der FR 2 975 458 A1 ist ein Verfahren zum Beschichten von Bohrungen in einem Motorblock bekannt. Vor dem Beschichten wird in einem oberen Endbereich jeder Bohrung eine ringförmige Nut eingebracht, welche zum Abtrennen des oberen Endbereiches dient.From the FR 2 975 458 A1 a method for coating bores in an engine block is known. Before coating, an annular groove is made in an upper end area of each bore, which is used to separate the upper end area.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Beschichten, eine Vorrichtung hierfür sowie einen Motorblock anzugeben, bei welchen eine besonders effiziente und verschmutzungsarme Beschichtung einer Bohrungswand ermöglicht ist.The invention has for its object to provide a method for coating, a device therefor and an engine block, in which a particularly efficient and low-pollution coating of a bore wall is made possible.

Die Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1, eine Vorrichtung mit den Merkmalen des Anspruchs 11 und mit einem Motorblock mit den Merkmalen des Anspruchs 12 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den jeweiligen Ansprüchen angegeben.The object is achieved by a method having the features of claim 1, an apparatus having the features of claim 11 and an engine block having the features of claim 12. Preferred embodiments of the invention are specified in the respective claims.

Eine Grundidee der Erfindung besteht darin, an der Eintrittsseite für die Beschichtungslanze einen Schutzring vorzusehen, welcher axial vorsteht. Die Metallpartikel aus der Beschichtungslanze verlassen diese im Wesentlichen in einer radialen Richtung. Durch das ringförmige Schutzelement wird somit ein Einschießen der Metallpartikel unmittelbar auf die Oberfläche der Eintrittsseite verhindert. Die radial in Richtung der Seite fliegenden Metallpartikel lagern sich somit an dem Schutzring an und können so nicht mehr auf die Oberfläche der Eintrittsseite gelangen. Der Schutzring kann unmittelbar an dem Rand oder bis zu einigen Millimetern radial davon beabstandet sein.A basic idea of the invention is to provide a protective ring on the entry side for the coating lance, which protrudes axially. The metal particles from the coating lance leave it essentially in a radial direction. The ring-shaped protective element thus prevents the metal particles from being shot directly onto the surface of the entry side. The metal particles flying radially in the direction of the side thus accumulate on the protective ring and can therefore no longer reach the surface of the entry side. The protective ring can be directly at the edge or radially spaced up to a few millimeters from it.

Im Übrigen kann zur Durchführung des Verfahrens eine Vorrichtung verwendet werden, wie sie in der eingangs genannten EP 3 047 914 A1 gelehrt ist.In addition, a device such as that mentioned in the introduction can be used to carry out the method EP 3 047 914 A1 is taught.

Gemäß einer Weiterbildung der Erfindung ist es bevorzugt, dass nach dem Beschichten der Schutzring entfernt wird. Damit ist die gewünschte Geometrie des Werkstücks durch den Schutzring nicht beeinträchtigt.According to a development of the invention, it is preferred that the protective ring is removed after coating. This means that the desired geometry of the workpiece is not affected by the protective ring.

Gemäß der Erfindung ist es besonders vorteilhaft, dass der Schutzring unmittelbar an dem Werkstück ausgebildet wird. Der Schutzring kann dabei bei einem Bearbeiten des Motorblocks an diesem fugenlos ausgebildet sein.According to the invention, it is particularly advantageous that the protective ring is formed directly on the workpiece. The protective ring can be formed seamlessly when machining the engine block.

Nach der Erfindung ist vorgesehen, dass der Schutzring durch spanloses Umformen aus einem duktilen Material des Werkstücks gebildet wird. Das Werkstück, insbesondere ein Motorblock für einen Verbrennungsmotor für Fahrzeuge, ist aus einem duktilen Metallmaterial, insbesondere Aluminium oder Stahl hergestellt. Derartige Metalle sind bis zu einem gewissen Grad spanlos umformbar. Beispielsweise kann mittels eines Drückstiftes oder Drückdornes, welcher entlang einem oberen Rand der zu beschichtenden Zylinderbohrung in das Material des Werkstücks eingedrückt und kreisförmig verfahren wird, durch spanlose Materialverdrängung ein zur freien Dicht- oder Auflageseite vorspringender Schutzring ausgeformt werden. Der Schutzring ist somit einstückig an dem Werkstück ausgebildet. Ein derartiges spanloses Umformverfahren ist einfach und präzise durchführbar.According to the invention, it is provided that the protective ring is formed from a ductile material of the workpiece by non-cutting shaping. The workpiece, in particular an engine block for an internal combustion engine for vehicles, is made from a ductile metal material, in particular aluminum or steel. Such metals can be formed to a certain degree without cutting. For example, a protective ring protruding toward the free sealing or support side can be formed by means of a non-cutting material displacement by means of a pressing pin or pressing mandrel, which is pressed into the material of the workpiece and moved in a circular manner along an upper edge of the cylinder bore to be coated. The protective ring is thus formed in one piece on the workpiece. Such a chipless forming process can be carried out simply and precisely.

Die Dimensionierung des Schutzringes ist abhängig vom jeweiligen Werkstück und dessen Dimensionierungen. Besonders bevorzugt ist es, dass der Schutzring mit einer axialen Länge von 0,05 mm bis 3 mm ausgebildet wird. In bestimmten Fällen können auch abweichende Längen eingestellt werden.The dimensioning of the protective ring depends on the respective workpiece and its dimensions. It is particularly preferred that the protective ring is formed with an axial length of 0.05 mm to 3 mm. In certain cases, different lengths can also be set.

Grundsätzlich ist es möglich, den Schutzring mit einem gewissen radialen Abstand zur Innenwand der zu beschichtenden Bohrung auszubilden. Besonders vorteilhaft ist es nach einer Ausführungsvariante der Erfindung, dass der Schutzring mit einem Innendurchmesser ausgebildet wird, welcher einem Innendurchmesser der Bohrung entspricht. Der Schutzring stellt somit eine gewisse axiale Verlängerung der Innenwand der Bohrung dar.In principle, it is possible to form the protective ring with a certain radial distance from the inner wall of the bore to be coated. According to one embodiment variant of the invention, it is particularly advantageous that the protective ring is formed with an inner diameter which corresponds to an inner diameter of the bore. The protective ring thus represents a certain axial extension of the inner wall of the bore.

Eine vorteilhafte Weiterbildung der Erfindung besteht darin, dass der Schutzring und die Bohrungswand mit der Beschichtung versehen werden. Da der Schutzring eine Verlängerung der Bohrungswand darstellt, wird hierdurch zuverlässig eine gute Beschichtung der Bohrungswand bis zum eigentlich gewünschten Randbereich erzeugt. Dies gewährleistet eine besonders stabile Beschichtung an der Bohrungswand.An advantageous development of the invention is that the protective ring and the bore wall are provided with the coating. Since the protective ring is an extension of the bore wall, a reliable coating of the bore wall up to the actually desired edge area is reliably produced. This ensures a particularly stable coating on the bore wall.

Dabei ist es nach einer weiteren Ausführungsvariante der Erfindung besonders vorteilhaft, dass der Schutzring nach dem Beschichten spanabhebend entfernt wird. Damit wird die gewünschte Geometrie des Motorblocks, insbesondere eine plane Aufsatzseite des Motorblocks, welche insbesondere für eine Zylinderkopfdichtung benötigt wird, erreicht. Durch das spanabhebende Entfernen des Schutzringes, insbesondere wenn dieser mit der Beschichtung versehen wurde, wird ein definierter sauberer Randabschluss der Beschichtung an der Bohrungswand erzielt. Dies ist für eine Langlebigkeit der Beschichtung vorteilhaft.According to a further embodiment variant of the invention, it is particularly advantageous that the protective ring is removed by machining after coating. The desired geometry of the engine block, in particular a flat attachment side of the engine block, which is required in particular for a cylinder head gasket, is thus achieved. By removing the protective ring by cutting, in particular if it has been provided with the coating, a defined, clean edge finish of the coating on the bore wall is achieved. This is advantageous for the longevity of the coating.

In bevorzugter Weise ist dies nach einer Weiterbildung der Erfindung noch dadurch verbessert, dass beim Entfernen des Schutzrings an dem Rand der Bohrung eine Fase ausgebildet wird. Eine Fase, insbesondere mit einem Fasenwinkel von 15° bis 30°, wirkt einem Abscheren der Beschichtung besonders gut entgegen.According to a development of the invention, this is preferably further improved in that a chamfer is formed on the edge of the bore when the protective ring is removed. A chamfer, particularly with a chamfer angle of 15 ° to 30 °, counteracts shearing of the coating particularly well.

Eine weitere bevorzugte Verfahrensvariante nach der Erfindung besteht darin, dass vor einem Ausbilden des Schutzrings die Seite plan bearbeitet wird. Die Planbearbeitung erfolgt insbesondere durch spanabhebendes Bearbeiten, insbesondere durch Abfräsen. Dabei kann bereits bevorzugterweise die Endbemaßung des Motorblocks erfolgen, da keine weitere Reinigungsmaßnahme der Seite mit ebener Dichtfläche benötigt wird. Alternativ kann eine Planbearbeitung der Seite auch erst nach oder bei dem Entfernen des Schutzrings erfolgen. Durch die verbesserte Dichtwirkung des Schutzrings beim Beschichten kann ein Auflagering der Beschichtungsvorrichtung auf eine rauere Oberfläche aufgesetzt werden.Another preferred method variant according to the invention consists in that the side is machined flat before the protective ring is formed. The plan processing is carried out in particular by machining, in particular by milling. The final dimension of the engine block can already be preferred as no further cleaning of the side with a flat sealing surface is required. Alternatively, the page can only be edited after or when the protective ring is removed. Due to the improved sealing effect of the protective ring during coating, a support ring of the coating device can be placed on a rougher surface.

Grundsätzlich kann die Beschichtung mit jeder geeigneten Beschichtungsmethode auf die Bohrungswand aufgebracht werden. Gemäß einer Ausführungsform der Erfindung ist es besonders vorteilhaft, dass die Beschichtung mittels Plasmabeschichtung oder thermischer Beschichtung aufgetragen wird. Derartige Beschichtungsweisen ermöglichen eine besonders gute Anhaftung der Metallpartikel an einer metallischen Bohrungswand.In principle, the coating can be applied to the bore wall using any suitable coating method. According to one embodiment of the invention, it is particularly advantageous that the coating is applied by means of plasma coating or thermal coating. Coating methods of this type allow the metal particles to adhere particularly well to a metallic bore wall.

Eine weitere bevorzugte Verfahrensvariante der Erfindung besteht darin, dass die Beschichtungsvorrichtung mit einem Auflagering auf die Seite des Werkstücks aufgesetzt wird, wobei der Auflagering auf Stoß auf der Seite aufliegt und einen Rand der zu beschichtenden Bohrung ringförmig umschließt, und dass der Schutzring eine Stoßfuge zwischen dem Auflagering und der Seite des Werkstücks axial überdeckt. Der Schutzring kann je nach seiner axialen Größe einige Zehntel oder einige Millimeter, im Extremfall sogar einige Zentimeter von der Stoßfuge entfernt sein. Durch den Schutzring wird ein Einschießen der Metallpartikel unmittelbar in die Stoßfuge verhindert. Hierdurch werden sowohl die ebene Dichtfläche der Seite als auch die Auflagefläche des Auflagerings von Metallpartikeln sauber gehalten. Es werden auch metallische Verbindungseffekte zwischen der Seite und dem Auflagering vermieden, welche beim Abheben des Auflagerings Beschädigungen an der Dichtfläche oder der Auflagefläche bewirken können.Another preferred method variant of the invention is that the coating device is placed with a support ring on the side of the workpiece, the support ring abutting on the side and annularly enclosing an edge of the bore to be coated, and that the protective ring a butt joint between the Support ring and the side of the workpiece axially covered. Depending on its axial size, the protective ring can be a few tenths or a few millimeters, in extreme cases even a few centimeters from the butt joint. The protective ring prevents the metal particles from shooting directly into the butt joint. As a result, both the flat sealing surface of the side and the support surface of the support ring of metal particles are kept clean. Metallic connection effects between the side and the support ring are also avoided, which can cause damage to the sealing surface or the support surface when the support ring is lifted off.

Hinsichtlich der erfindungsgemäßen Vorrichtung zum Beschichten einer Bohrungswand einer Bohrung, zum Durchführen des erfindungsgemäßen Verfahrens, ist es nach der Erfindung vorgesehen, dass ein Drückelement vorgesehen ist, welches entlang eines Randes einer Bohrung in einem Werkstück verfahrbar und in das Werkstück eindrückbar ist, wobei ein axial vorstehender Schutzring spanlos ausformbar ist. Das Drückelement ist vorzugsweise stiftförmig als ein Drückstift ausgebildet, der vorzugsweise drehbar gelagert ist. Der drehbare Drückstift kann mit einer entsprechenden Zustellvorrichtung unter Aufbringung einer entsprechenden radial gerichteten Kraft entlang des Randes der Bohrung verfahren werden. Hierbei entsteht eine gewisse Einformung, wobei durch das so verdrängte Material der gewünschte axial vorstehende Schutzring am Rand der Bohrung erstellt wird.With regard to the device according to the invention for coating a hole wall of a hole, for carrying out the method according to the invention, it is provided according to the invention that a pressing element is provided which can be moved along an edge of a hole in a workpiece and pressed into the workpiece, one axially the above protective ring can be formed without cutting. The pressing element is preferably pin-shaped as a pressing pin, which is preferably rotatably mounted. The rotatable push pin can be fitted with a corresponding feed device by applying a corresponding radial directed force can be moved along the edge of the bore. This creates a certain indentation, whereby the material that is displaced in this way creates the desired axially protruding protective ring at the edge of the bore.

Als Zustellvorrichtung kann insbesondere eine grundsätzlich bekannte CNC-Fräsmaschine oder ein CNC-Bearbeitungszentrum verwendet werden, wobei jedoch statt eines spanabhebenden Fräskopfes das nach der Erfindung ausgebildete stiftförmige Drückelement eingesetzt ist. Diese kann aktiv durch eine angetriebene Spindel an der Zustellvorrichtung oder passiv durch Abrollen an dem Werkstück gedreht werden.In particular, a generally known CNC milling machine or a CNC machining center can be used as the feed device, but instead of a cutting milling head, the pin-shaped pressing element designed according to the invention is used. This can be rotated actively by a driven spindle on the feed device or passively by rolling on the workpiece.

Die eingangs genannte Aufgabe wird hinsichtlich des Motorblocks gemäß der Erfindung dadurch gelöst, dass an einem Rand der mindestens einen Zylinderbohrung zu der Aufsatzseite ein von der Dichtfläche axial vorstehender Schutzring einstückig an dem Grundkörper ausgebildet ist. Der Motorblock kann dabei das Endwerkstück oder vorzugsweise eine Zwischenform sein. Das Erzeugen des Schutzringes erfolgt spanlos vor einer Beschichtung der zyinderbohrung.The above-mentioned object is achieved with respect to the engine block according to the invention in that a protective ring axially protruding from the sealing surface is integrally formed on the base body at an edge of the at least one cylinder bore on the attachment side. The engine block can be the end workpiece or preferably an intermediate shape. The protective ring is produced without cutting before coating the cylinder bore.

Eine vorteilhafte Ausführungsform der Erfindung besteht darin, dass der mindestens eine Schutzring nach einer Planbearbeitung der Dichtfläche durch spanloses Umformen aus dem Grundkörper ausgeformt ist. Das spanlose Umformen kann insbesondere durch einen Drückvorgang bewirkt werden. Dabei wird an einem oberen Randbereich der Bohrung eine ringförmige Nut in die Bohrungswand eingeformt. Hierdurch wird eine Materialverdrängung bewirkt, welche an der freien Auflageseite zu einem Ausbilden oder axialen Aufwölben des Schutzringes entlang des Bohrungsrandes führt. Nach einer Beschichtung kann der so ausgebildete Schutzring zusammen mit der eingedrückten Nut am oberen Rand der Bohrung durch spanabhebendes Bearbeiten, insbesondere durch AnFasen, entfernt werden.An advantageous embodiment of the invention consists in that the at least one protective ring is formed from the base body by non-cutting shaping after machining the sealing surface. The chipless forming can be effected in particular by a pressing process. In this case, an annular groove is formed in the wall of the hole at an upper edge region of the hole. This results in a material displacement, which leads to the formation or axial bulging of the protective ring along the edge of the bore on the free support side. After a coating, the protective ring formed in this way, together with the pressed-in groove at the upper edge of the bore, can be removed by machining, in particular by chamfering.

Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen weiter erläutert, welche schematisch in den beigefügten Zeichnungen dargestellt sind. In den Zeichnungen zeigen:

Fig. 1
eine Teilquerschnittsansicht eines Werkstücks mit einer zu beschichtenden Bohrung;
Fig. 2
eine Teilquerschnittsansicht des Werkstücks nach dem Ausbilden eines Schutzrings;
Fig. 3
eine Teilquerschnittsansicht des Werkstücks von Fig. 2 mit aufgesetzter Beschichtungsvorrichtung; und
Fig. 4
eine Teilquerschnittsansicht des beschichteten Werkstücks nach Entfernen des Schutzrings, und
Fig. 5
eine schematische Detailansicht zu einer erfindungsgemäßen Vorrichtung.
The invention is further explained below on the basis of preferred exemplary embodiments, which are shown schematically in the accompanying drawings. The drawings show:
Fig. 1
a partial cross-sectional view of a workpiece with a bore to be coated;
Fig. 2
a partial cross-sectional view of the workpiece after the formation of a guard ring;
Fig. 3
a partial cross-sectional view of the workpiece of Fig. 2 with attached coating device; and
Fig. 4
a partial cross-sectional view of the coated workpiece after removal of the protective ring, and
Fig. 5
a schematic detailed view of a device according to the invention.

Ein zu beschichtendes Werkstück 10 mit mindestens einer Bohrung 12 mit einer zu beschichtenden Bohrungswand 14 ist in Fig. 1 dargestellt. In einen Grundkörper 11 des metallischen Werkstücks 10, welcher vorzugsweise als ein Motorblock eines Verbrennungsmotors ausgebildet ist, können mehrere Bohrungen 12 als Zylinderbohrungen vorgesehen sein. Wie bei einem Motorblock üblich, weist das Werkstück 10 an einer Oberseite eine plan bearbeitete Seite 16 auf, welche beispielsweise zum Aufnehmen einer Flachdichtung, insbesondere einer Zylinderkopfdichtung, dient.A workpiece 10 to be coated with at least one bore 12 with a bore wall 14 to be coated is shown in FIG Fig. 1 shown. In a base body 11 of the metallic workpiece 10, which is preferably designed as an engine block of an internal combustion engine, a plurality of bores 12 can be provided as cylinder bores. As is customary with an engine block, the workpiece 10 has a flat machined side 16 on an upper side, which is used, for example, to accommodate a flat gasket, in particular a cylinder head gasket.

Vor dem Aufbringen einer Beschichtung wird gemäß Fig. 2 nahe der Seite 16 an einem oberen Randbereich der Bohrung 12 in die Bohrungswand 14 eine ringförmige Nut 22 eingedrückt. Das spanlose Eindrücken der Nut 22 führt aufgrund des duktilen metallischen Materials des Grundkörpers 11 zu einer Materialverdrängung. Durch eine entsprechende Gestaltung einer Drückvorrichtung mit verfahrbarem Drückdorn und mit Abstützflächen an der Bohrungswand 14 kann die Materialverdrängung gezielt zum Ausbilden eines axial vorstehenden Schutzrings 20 am oberen Rand der Bohrung 12 erzeugt werden. Die Dimensionierung des Schutzrings 20 hängt von der Größe der Nut 22 und der dadurch bewirkten Materialverdrängung ab. Die axiale Länge und die radiale Breite des Schutzrings 20 kann von einigen zehntel Millimetern bis zu einigen Millimetern reichen. Durch entsprechende Abstützelemente oder Abstützringe der vorgesehenen Drückeinrichtung kann eine gezielt Ausgestaltung des Schutzrings durch das verdrängte Material bewirkt werden.Before applying a coating, according to Fig. 2 an annular groove 22 is pressed into the bore wall 14 near the side 16 at an upper edge region of the bore 12. The chipless pressing of the groove 22 leads to a material displacement due to the ductile metallic material of the base body 11. The material displacement can be generated in a targeted manner to form an axially protruding guard ring 20 at the upper edge of the bore 12 by appropriately designing a pushing device with a movable spike and with support surfaces on the bore wall 14. The dimensioning of the protective ring 20 depends on the size of the groove 22 and the material displacement caused thereby. The axial length and radial width of the guard ring 20 can range from a few tenths of a millimeter to a few millimeters. Appropriate support elements or support rings of the provided pushing device allow the protective ring to be designed in a targeted manner by the displaced material.

Zum Aufbringen der Beschichtung wird gemäß Fig. 3 auf die plane Seite 16 eine Beschichtungsvorrichtung 50 mit einem etwa zylindrischen Gehäuse 54 und einem zentrischen Auflagering 56 aufgesetzt. Der Auflagering 56 weist an seiner Unterseite eine plane Auflagefläche 58 auf. Beim Kontaktieren der planen Auflagefläche 58 des Auflagerings 56 auf der planen Seite 16 des Werkstücks 10 bildet sich eine Kontakt- oder Stoßfuge 5 aus. Ein Innendurchmesser des Auflagerings 56 ist vorzugsweise geringfügig größer als ein Außendurchmesser des ausgeformten Schutzrings 20. Durch den axial vorstehenden Schutzring 20 wird in einer radialen Richtung eine Abdeckung oder ein Schutz der Stoßfuge 5 gegen ein radiales Eindringen von Plasmapartikeln bewirkt.To apply the coating according to Fig. 3 on the flat side 16 a coating device 50 with an approximately cylindrical housing 54 and a centric support ring 56 placed. The support ring 56 has a flat support surface 58 on its underside. When contacting the flat bearing surface 58 of the bearing ring 56 on the flat side 16 of the workpiece 10, a contact or butt joint 5 is formed. An inner diameter of the support ring 56 is preferably slightly larger than an outer diameter of the formed protective ring 20. The axially protruding protective ring 20 in a radial direction provides coverage or protection of the butt joint 5 against radial penetration of plasma particles.

Zum Beschichten der Bohrungswand 14 wird eine stabförmige Beschichtungslanze 52 aus dem zylindrischen Gehäuse 54 der Beschichtungsvorrichtung 50 axial ausgefahren. Vorzugsweise befindet sich die Beschichtungslanze 52 bereits in dem Gehäuse 54 in einem Sprühbetrieb, wobei an einem unteren Ende der Beschichtungslanze 52 aufgeschmolzene Metallpartikel mit hoher Geschwindigkeit austreten, was durch Sprühstrahlen 53 in Fig. 3 verdeutlicht ist. Es ist ersichtlich, dass sich die Stoßfuge 5 in einem Sprühschatten befindet, welcher durch den axial vorstehenden Schutzring 20 gebildet ist. Hierdurch wird zuverlässig verhindert, dass Plasmapartikel in die Stoßfuge 5 eindringen und die Seite 16 des Werkstücks 10 oder die Auflagefläche 58 des Auflagerings 56 verunreinigen.To coat the bore wall 14, a rod-shaped coating lance 52 is axially extended from the cylindrical housing 54 of the coating device 50. The coating lance 52 is preferably already in the housing 54 in a spraying operation, with molten metal particles escaping at a lower end of the coating lance 52 at high speed, which is caused by spray jets 53 in Fig. 3 is made clear. It can be seen that the butt joint 5 is in a spray shadow which is formed by the axially protruding guard ring 20. This reliably prevents plasma particles from entering the butt joint 5 and contaminating the side 16 of the workpiece 10 or the bearing surface 58 of the bearing ring 56.

An einer Innenseite des Auflagerings 56 ist eine abgeschrägte Ablenkfläche 59 vorgesehen, durch welche Metallpartikel des Plasmastrahls axial in Richtung des Inneren des Gehäuses 54 abgelenkt werden. Das Gehäuse 54 ist zum Aufnehmen derartiger Metallpartikel ausgebildet und kann in bestimmten Zeitabständen zum Entleeren gewechselt werden.A beveled deflection surface 59 is provided on an inside of the support ring 56, through which metal particles of the plasma jet are deflected axially in the direction of the interior of the housing 54. The housing 54 is designed to accommodate such metal particles and can be replaced at certain intervals for emptying.

Zum Bilden der Beschichtung 30 fährt die Beschichtungslanze 52 in die Bohrung 12 ein, wobei die Beschichtungslanze 52 gedreht wird. Hierdurch wird gezielt eine Beschichtung 30 an der Bohrungswand 14 ausgebildet, wie in Fig. 4 gezeigt ist.In order to form the coating 30, the coating lance 52 moves into the bore 12, the coating lance 52 being rotated. As a result, a coating 30 is specifically formed on the bore wall 14, as in FIG Fig. 4 is shown.

Nach einem Beenden des Beschichtens wird die Beschichtungslanze 52 aus der Bohrung 12 zurückgezogen und die Beschichtungsvorrichtung insgesamt von dem Werkstück 10 entfernt. Abschließend kann der axial vorstehende Schutzring 20 durch eine spanabhebende Bearbeitung entfernt werden. Es kann am Rand der Beschichtung 30 eine Abschrägung oder Fase 32 ausgebildet werden. Dabei kann auch der Bereich mit der Nut 22 entfernt werden, soweit dies notwendig sein sollte.After the coating has ended, the coating lance 52 is withdrawn from the bore 12 and the coating device as a whole is removed from the workpiece 10. Finally, the axially protruding guard ring 20 can be removed by machining. It can be on the edge of Coating 30 a bevel or chamfer 32 are formed. The area with the groove 22 can also be removed, if this should be necessary.

Eine abschließende flächige Bearbeitung der Seite 16 des Werkstücks 10 ist bei dem erfindungsgemäßen Verfahren nicht oder allenfalls in einem sehr reduzierten Umfang notwendig.A final planar processing of the side 16 of the workpiece 10 is not necessary or at most to a very limited extent in the method according to the invention.

In Fig. 5 ist stark schematisiert ein Teil einer erfindungsgemäße Vorrichtung 40 zum Bearbeiten einer Bohrungswand 14 einer Bohrung 12 in einem Werkstück 10 dargestellt. Die Vorrichtung 40 weist ein stiftförmiges Drückelement 42 auf, welches drehbar angetrieben in einer Zustelleinheit 44 gelagert ist. Mit der Zustelleinheit 44 kann das Drückelement 42 kreisförmig entlang des Randes der Bohrung 12 verfahren werden, wobei eine Einformung gebildet wird. Durch das verdrängte Material 21 der Einformung wird am oberen Rand der Bohrung 12 ein Schutzring 20 ausgebildet.In Fig. 5 a part of a device 40 according to the invention for machining a bore wall 14 of a bore 12 in a workpiece 10 is shown in a highly schematic manner. The device 40 has a pin-shaped pressing element 42 which is rotatably driven in an infeed unit 44. With the infeed unit 44, the pressing element 42 can be moved in a circular manner along the edge of the bore 12, a recess being formed. Due to the displaced material 21 of the indentation, a protective ring 20 is formed on the upper edge of the bore 12.

Claims (13)

  1. Method for coating a bore wall (14) of a bore (12) in a workpiece (10), in particular a cylinder bore in an engine block, in which
    - a coating lance (52) of a coating device (50) is introduced into the bore (12) from one side (16) of the workpiece (10) whilst releasing coating particles, wherein the bore wall (14) is provided with a coating (30),
    - wherein, before coating, an annular protective ring (20), which protrudes axially with respect to the side (16) of the workpiece (10), is designed on the edge of the bore (12) directly on the workpiece (10),
    characterized in that
    - the protective ring (20) is formed by chipless shaping of a ductile material of the workpiece (10).
  2. Method according to claim 1,
    characterized in that
    after coating the protective ring (20) is removed.
  3. Method according to any one of claims 1 or 2,
    characterized in that
    the protective ring (20) is designed with an axial length of 0.05 mm to 3 mm.
  4. Method according to any one of claims 1 to 3,
    characterized in that
    the protective ring (20) is designed with an internal diameter that corresponds approximately to an internal diameter of the bore (12).
  5. Method according to any one of claims 1 to 4,
    characterized in that
    the protective ring (20) and the bore wall (14) are provided with the coating (30).
  6. Method according to any one of claims 1 to 5,
    characterized in that
    after coating the protective ring (20) is removed in a chip-removing manner.
  7. Method according to claim 6,
    characterized in that
    during removal of the protective ring (20) a chamfer (32) is designed on the edge of the bore (12).
  8. Method according to any one of claims 1 to 7,
    characterized in that
    before designing the protective ring (20) the side (16) of the workpiece (10) is worked for forming a planar surface.
  9. Method according to any one of claims 1 to 8,
    characterized in that
    the coating (30) is applied by means of plasma coating or thermal coating.
  10. Method according to any one of claims 1 to 9,
    characterized in that
    the coating device (50) is placed with a bearing ring (56) onto the side (16) of the workpiece (10), wherein the bearing ring (56) rests in an abutting manner on the side (16) and annularly encloses an edge of the bore (12) to be coated, and
    in that the protective ring (20) axially covers a butt joint (5) between the bearing ring (56) and the side (16) of the workpiece (10).
  11. Device for coating a bore wall (14) of a bore (12),
    which comprises a coating device (50) with a coating lance (52) which can be introduced into the bore (12) from one side (16) of the workpiece (10) whilst releasing coating particles, wherein the bore wall (14) is provided with a coating (30),
    characterized in that
    to carry out a method according to any one of claims 1 to 10 a spinning element (42) is provided which can be moved along an edge of the bore (12) into the workpiece (10) and can be pressed into the workpiece (10), wherein an axially protruding protective ring (20) can be shaped in a chipless manner.
  12. Engine block with a base body (11), in which at least one cylinder bore (12) is arranged on one side (16), wherein the side (16) is worked for forming a planar surface,
    characterized in that
    on an edge of the at least one cylinder bore (12) towards the side (16) an axially protruding protective ring (20) is shaped integrally in a chipless manner on the base body (11).
  13. Engine block according to claim 12,
    characterized in that
    after planar working of the side (16) the at least one protective ring (20) is shaped from the base body (11) by chipless shaping.
EP16186802.1A 2016-09-01 2016-09-01 Method for coating a cylinder wall, corresponding device and crankcase Active EP3290125B1 (en)

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Application Number Priority Date Filing Date Title
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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161873A (en) * 1978-01-26 1979-07-24 Combustion Engineering, Inc. Internal and external extruded nipples or nozzles in pipe headers or boiler drums
JP3664377B2 (en) * 2000-06-21 2005-06-22 スズキ株式会社 Cylinder spraying equipment
FR2975458B1 (en) * 2011-05-19 2013-05-31 Peugeot Citroen Automobiles Sa CYLINDER CASTER BLANK AND PROCESS FOR PREPARING A CRANK CASTER
ES2665555T3 (en) * 2014-07-30 2018-04-26 Sturm Maschinen- & Anlagenbau Gmbh Device and procedure for metal cladding as well as receiving unit for the device
EP3047914B1 (en) 2015-01-20 2018-10-10 Sturm Maschinen- & Anlagenbau GmbH Installation and method for coating a workpiece with metallic material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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HUE048450T2 (en) 2020-07-28
EP3290125A1 (en) 2018-03-07

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