EP1556585A1 - Verfahren zur herstellung einer einrichtung zur umsetzung einer rotatorischen in eine translatorische bewegung und damit hergestellte einrichtung - Google Patents
Verfahren zur herstellung einer einrichtung zur umsetzung einer rotatorischen in eine translatorische bewegung und damit hergestellte einrichtungInfo
- Publication number
- EP1556585A1 EP1556585A1 EP03798177A EP03798177A EP1556585A1 EP 1556585 A1 EP1556585 A1 EP 1556585A1 EP 03798177 A EP03798177 A EP 03798177A EP 03798177 A EP03798177 A EP 03798177A EP 1556585 A1 EP1556585 A1 EP 1556585A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ceramic
- layers
- functional layer
- metal
- camshaft
- 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.)
- Granted
Links
Classifications
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
- F01L2301/02—Using ceramic materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
Definitions
- the invention relates to a method for producing a device for converting a rotary movement into a translatory movement and a device produced according to this method.
- the present invention relates to a camshaft, preferably for engines of motor vehicles. Furthermore, the present invention also relates to similar elements or assemblies which convert a rotational movement into a translational movement, in particular a lifting movement, for example by lifting elements running on rotating (cam) disks with different curvatures and being moved counter to the direction of rotation.
- Cam gears should preferably also be mentioned here.
- camshafts are also beginning to establish themselves.
- the cams are fixed on the shaft, for example by pressing on and / or by partially widening the shaft body directly under the cam.
- the cams are connected individually and one after the other to the shaft.
- the built camshafts are, however, limited in the constructive design freedom set. In addition, there is only a non-positive or positive connection of the cams to the shaft. In addition, the built camshafts are comparatively expensive to manufacture, so the costs are approx. 30 percent higher compared to a conventional cast shaft.
- the built camshafts are mostly only used when the cast material reaches its technical limits.
- built camshafts are used to reduce weight.
- the realizable weight saving compared to solid cast camshafts is 20-40%.
- a method for producing a camshaft and a camshaft produced therewith is known, the camshaft being produced by internal high pressure forming and then a layer of wear-resistant material being applied in the area of the treads by the action of a charge carrier jet.
- a band-shaped or wire-shaped, wear-resistant material is introduced in a vacuum into the energy field of the electron beam at a defined speed, melted and transferred to the running surface of a cam of the camshaft.
- the treads are then machined to a desired final dimension.
- cored wire and sheet metal also severely limits the range of materials available for the coating.
- the method described is unsuitable for applying non-conductive materials, such as ceramics.
- the process for the production of defined structures (which can result from layers of composite materials such as metal ceramics (hard metals)) is unsuitable when using the cored wires. It is therefore an object of the present invention to provide a method for producing a device for converting a rotary movement into a translatory movement and a device produced according to this method, with which a wear-resistant layer can be applied without substantial thermal distortion occurring.
- this object is achieved according to the invention by a method for producing a device for converting a rotary movement into a translatory movement, at least in sections, at least in sections, at least one functional layer made of a ceramic, metal-ceramic or metallic material being applied mechanically to a surface of the device.
- the method according to the invention enables a wear-resistant layer to be applied to the device for converting a rotary movement into a translatory movement without the device being thermally distorted.
- the method according to the invention enables a further reduction in weight and friction compared to the known prior art through the use of wear-resistant ceramic, metal-ceramic and metallic layers.
- a hollow shaft having at least one lifting element is (initially) produced in an internal high-pressure forming process (“IHU process”). It is advantageous here if the at least one functional layer in the region of a running surface of the at least one lifting element and / It is also advantageous if the functional layers applied in the area of the running surface of the at least one lifting element and / or in the area of bearing areas of the hollow shaft are made of the same or different materials and each in one or several layers are formed.
- IHU process internal high-pressure forming process
- a method from the thermal spraying method group in particular plasma spraying or high-speed flame spraying, is used to produce the at least one functional layer from a ceramic, metal-ceramic or metallic material with clinging to the surface of the hollow shaft.
- the at least one lifting element and / or the bearing surfaces are formed with a circumferential depression, which form a receptacle for the functional layer to be applied.
- the functional layer is designed as a wear protection layer and / or as a friction influencing layer.
- the surfaces of the device are preferably roughened, in particular sandblasted, at least in the region of the functional layer to be applied (before application of the same).
- the above-mentioned object is achieved according to the invention by a device for converting a rotary into a translatory movement produced by the above method.
- the device is designed as a hollow camshaft produced by means of internal high-pressure forming (IHU process) with at least one cam, a running surface of the at least one cam and / or bearing surfaces of the camshaft being wear-resistant ceramic, metal-ceramic or have metallic functional layers which are connected to them with mechanical clamping.
- IHU process internal high-pressure forming
- Ceramic layers or metal-ceramic layers or metal-ceramic hard metal layers or metallic layers are advantageously applied by thermal spraying.
- cams and / or the bearing surfaces encircle have a trough that serves as a bed for the functional layer to be applied.
- Figure 1 shows a partial sectional view along a longitudinal axis of a camshaft in the region of a cam.
- the camshaft 1 with a cam 2 shown by way of example in a longitudinal sectional illustration in FIG. 1 is an intake camshaft 1 made of material St 52 for a three-cylinder four-valve engine and produced by internal high-pressure forming (IHU process).
- the complete camshaft has 6 cams.
- camshaft 1 can also be provided with a functional layer 3.
- bearing surfaces of the camshaft 1 can be provided with such a functional layer 3.
- the individual functional surfaces 3 (on the cams 2 or at other locations on the camshaft 1, in particular the bearing surfaces) can be produced from the same or similar or equivalent materials or from different materials.
- the choice of material is particularly dependent on the individual technical purpose (e.g. wear protection or friction improvement) and also on the technical boundary conditions.
- the cams 2 each have a circumferential depression, the depression having an essentially flat depression and two raised edge regions provided with radii.
- the present invention is not limited to the shape of the trough shown in FIG. 1. Rather, it depends on the intended use, the shape of the functional surface to be produced, the depending on the respective coating process and the respective material of the functional surface. For example, it is also possible to provide a plurality of substantially planar depressions, each with raised edge regions which limit these and are provided with radii.
- This circumferential trough serves as a receiving bed for the functional layer 3 to be applied.
- the material of the functional layer 3 completely fills the trough, the functional layer being formed with the raised edge regions of the trough. This results in a flat cam running surface.
- a depth of the trough of 1 mm has proven to be particularly advantageous.
- a width of the trough corresponds to a width of an associated roller rocker arm of the motor, although the present invention is not restricted to this.
- a coating of the intake camshaft 1 with the functional layer 3 takes place via the incorporation of a wear-resistant ceramic, metal-ceramic or metallic material with mechanical clamping with a surface of the intake camshaft 1 in the region of the depression and by filling the depression with this material.
- This mechanical clamping can preferably be supported by the camshaft being subjected to a preparatory, roughening surface treatment, e.g. by sandblasting, if necessary only in the area of the hollows.
- a preparatory, roughening surface treatment e.g. by sandblasting
- the intake camshaft 1 was coated with an MF-P-1000 system from GTV mbH / Luckenbach by means of atmospheric plasma spraying.
- a metal ceramic (hard metal) (Ti, Mo) (C, N) - 37% Ni, Co was used as the coating powder.
- An Ar / H 2 plasma (50 l / min Ar, 11 l / min H 2 ) at a current of 630 A was used for spraying. The spray distance was 110 mm.
- cams are ground to their final dimensions, which results in the running surface of the cams 2.
- a test of the camshaft 1 generated in this way was then carried out. This test was carried out on a special test bench with a surface pressure of 1400 N / mm 2 , a speed of 3500 rpm, an oil temperature of 100 ° C and motor oil Esso Ultron SAE 5W40.
- a (still uncoated) camshaft is first produced using the IHU method.
- This is followed by the layer deposition by methods which are essentially based on mechanical clinging of the layer to the base and which only result in a low thermal energy input, preferably from the process group of thermal spraying (e.g. plasma spraying, high-speed flame spraying (HVOF ), among others).
- thermal spraying e.g. plasma spraying, high-speed flame spraying (HVOF ), among others.
- wear protection layers of up to 1.5 mm thick can also be produced in a simple manner and with no great technical outlay using new metallic, ceramic or metal-ceramic materials.
- Mo and Mo self-flowing alloy as metallic layers, • WC-Co, WC-CoCr, (Ti, Mo) (C, N) -NiCo as metal-ceramic (hard metal) layers, or
- the camshaft does not warp, i.e. subsequent adjustment of the shaft is not necessary.
- the use of new materials improves wear resistance and, at the same time, the friction on the cam.
- the use of ceramic layers also reduces weight. Reduction of manufacturing and material costs compared to the use of support rings, e.g. from 100 Cr6.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Plasma & Fusion (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Noodles (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Control Of Electric Motors In General (AREA)
- Manipulator (AREA)
- Ceramic Products (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10244151 | 2002-09-23 | ||
| DE10244151A DE10244151A1 (de) | 2002-09-23 | 2002-09-23 | Beschichtete hohle Nockenwelle |
| PCT/EP2003/010581 WO2004029421A1 (de) | 2002-09-23 | 2003-09-23 | Verfahren zur herstellung einer einrichtung zur umsetzung einer rotatorischen in eine translatorische bewegung und damit hergestellte einrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1556585A1 true EP1556585A1 (de) | 2005-07-27 |
| EP1556585B1 EP1556585B1 (de) | 2006-04-12 |
Family
ID=31983992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03798177A Expired - Lifetime EP1556585B1 (de) | 2002-09-23 | 2003-09-23 | Verfahren zur herstellung einer einrichtung zur umsetzung einer rotatorischen in eine translatorische bewegung und damit hergestellte einrichtung |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1556585B1 (de) |
| AT (1) | ATE323216T1 (de) |
| AU (1) | AU2003275979A1 (de) |
| DE (2) | DE10244151A1 (de) |
| ES (1) | ES2262023T3 (de) |
| WO (1) | WO2004029421A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004025553B4 (de) * | 2004-05-25 | 2006-04-20 | Daimlerchrysler Ag | Nockenwelle und ein Verfahren zu deren Herstellung |
| DE102009025023A1 (de) | 2009-06-10 | 2010-12-16 | Neumayer Tekfor Holding Gmbh | Verfahren zur Herstellung einer Nockenwelle und entsprechende Nockenwelle |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1082461B (de) * | 1957-12-12 | 1960-05-25 | Maybach Motorenbau Gmbh | Welle, besonders Nockenwelle |
| GB859327A (en) * | 1957-12-12 | 1961-01-18 | Maybach Motorenbau Gmbh | Improvements in and relating to shafts |
| DE3303629C2 (de) * | 1982-02-26 | 1986-04-10 | Kokan Kako Co., Ltd., Yokohama, Kanagawa | Verfahren zum Herstellen einer Nockenwelle mit mindestens einem exzentrischen Nocken |
| DE3342316A1 (de) * | 1983-11-23 | 1985-05-30 | Bayerische Motoren Werke AG, 8000 München | Nockenwelle fuer brennkraftmaschinen |
| DE19545991A1 (de) * | 1995-12-09 | 1997-06-12 | Eckel Gmbh & Co Kg Heinrich | Gewichtsreduzierte Nockenwelle |
| DE19617593A1 (de) * | 1996-05-02 | 1998-01-29 | Haerle Hans A Dipl Ing | Hohle Nockenwelle aus Rohr |
| JPH11241605A (ja) * | 1998-02-24 | 1999-09-07 | Tube Foming Co Ltd | 中空一体型カムシャフトおよびその製造方法 |
| DE19907258C1 (de) * | 1999-02-21 | 2000-09-07 | Saechsische Elektronenstrahl G | Verfahren zur Herstellung von Nockenwellen und danach hergestellte Nockenwelle |
| DE20121375U1 (de) * | 2001-10-11 | 2002-08-08 | Salzgitter Antriebstechnik GmbH & Co. KG, 08451 Crimmitschau | Als Hohlwelle ausgebildete Nockenwelle |
-
2002
- 2002-09-23 DE DE10244151A patent/DE10244151A1/de not_active Withdrawn
-
2003
- 2003-09-23 DE DE50302979T patent/DE50302979D1/de not_active Expired - Lifetime
- 2003-09-23 ES ES03798177T patent/ES2262023T3/es not_active Expired - Lifetime
- 2003-09-23 WO PCT/EP2003/010581 patent/WO2004029421A1/de not_active Ceased
- 2003-09-23 AT AT03798177T patent/ATE323216T1/de not_active IP Right Cessation
- 2003-09-23 EP EP03798177A patent/EP1556585B1/de not_active Expired - Lifetime
- 2003-09-23 AU AU2003275979A patent/AU2003275979A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004029421A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003275979A8 (en) | 2004-04-19 |
| WO2004029421A1 (de) | 2004-04-08 |
| ES2262023T3 (es) | 2006-11-16 |
| ATE323216T1 (de) | 2006-04-15 |
| AU2003275979A1 (en) | 2004-04-19 |
| DE50302979D1 (de) | 2006-05-24 |
| DE10244151A1 (de) | 2004-04-08 |
| EP1556585B1 (de) | 2006-04-12 |
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