EP1753887A1 - Hochbeanspruchtes motorenbauteil - Google Patents
Hochbeanspruchtes motorenbauteilInfo
- Publication number
- EP1753887A1 EP1753887A1 EP05751295A EP05751295A EP1753887A1 EP 1753887 A1 EP1753887 A1 EP 1753887A1 EP 05751295 A EP05751295 A EP 05751295A EP 05751295 A EP05751295 A EP 05751295A EP 1753887 A1 EP1753887 A1 EP 1753887A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component according
- cam
- wear
- steel
- motor component
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/02—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of piston rings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/16—Silencing impact; Reducing wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- 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
Definitions
- the invention relates to a tribologically and dynamically highly stressed engine component, such as a cam follower, a cam, a valve actuation lever, a valve clearance compensation element for a valve train or a pump tappet for a high-pressure pump drive of an internal combustion engine.
- a tribologically and dynamically highly stressed engine component such as a cam follower, a cam, a valve actuation lever, a valve clearance compensation element for a valve train or a pump tappet for a high-pressure pump drive of an internal combustion engine.
- a plunger is known from DE 1 949479 U1, which is provided with an exchangeable adjusting disk made of a hard metal on its contact surface which is supported by the cam.
- DE-OS 25 26 656 A similar solution is out of the DE-OS 25 26 656 previously known.
- a valve lifter is described, the hollow shaft of which is made of a case hardening steel and the bottom part of which is made of an alloyed tool steel.
- DE 32 39 325 A1 also discloses a valve tappet for an internal combustion engine, the shaft of which is provided with an insert made of a ceramic sintered material for reasons of wear.
- DE 42 05 647 C2 discloses a method for the thermochemical-thermal treatment of case-hardening steels, in which the edge zone of a workpiece, in particular tappets, roller bearing parts, gear and coupling elements, is enriched with carbon and nitrogen and then subjected to a martensitic hardening.
- a similar solution can be found in DE 44 18245 C2.
- the sliding surfaces of a cam counter-rotor and / or a cam are subjected to case hardening with carburization, which is followed by quenching to a temperature well below the martensite starting point of the edge zone.
- this method has the disadvantage that it takes several hours.
- DE-OS 28 51 141 describes a method for producing a cam from an iron powder.
- DE 35 04 212 C2 shows such a method for producing a camshaft.
- Metal powder is first compressed in a mold under pressure and then annealed at temperatures below the melting point.
- diffusion processes begin, through which the particles of the initial structure grow together at their contact points.
- Sintering is divided into pre-sintering to increase the strength of the compacts and subsequent sintering for maximum compaction.
- the production of moldings in this way is also very complex, since corresponding molds must always be provided for the compression of the metal powder. Summary of the invention
- the object of the invention is to produce such components inexpensively while at the same time significantly improving wear behavior.
- this object is achieved according to the characterizing part of claim 1 in conjunction with its preamble in that the components are made of a wear-resistant alloy tool steel by powder metallurgical injection molding.
- Powder metallurgical injection molding also known as metal injection molding (MIM)
- MIM metal injection molding
- the freedom of plastic injection molding in component design is combined with the advantages of powder metallurgy, a wide range of materials, and very tight tolerances.
- the process is characterized in that fine metal powders in the range of 20 ⁇ m are mixed with organic binders to a homogeneous mass.
- the volume fraction of the metal powder is usually more than 50%. In this way, a mass is obtained which can be processed on injection molding machines analogously to the processing of plastics.
- injection molding process moldings are produced which already have all the typical geometrical features of the finished component, but which have a volume increased by the binder content.
- the organic binders are then removed in a debinding process, depending on the binder system used, either by thermal decomposition and evaporation or by solvent extraction.
- the remaining porous shaped bodies are compressed by sintering under various protective gases or under vacuum to form components with final geometric properties.
- the linear shrinkage that occurs leads to final densities greater than 96%.
- alloy tool steel is to be interpreted broadly.
- stainless steel is one of the group of tool steels high hardness, high wear resistance and high toughness, which are suitable for machining and processing materials. They must also have good resistance to temperature changes.
- tool steels are divided into cold work steels, hot work steels and high-speed steels.
- the structure of the blank consists of finely divided, wear-resistant carbides, which are inserted in a coordinated martensitic, sorbitic or pearlitic matrix. These carbides are extremely important for wear resistance.
- the advantage of such a component made from an alloyed tool steel by powder metallurgical injection molding is, in addition to the near-net-shape production, in particular that its properties, and thus also its wear resistance, are constant over the entire component depth.
- the tool steel is a cold work steel or a high speed steel.
- Cold work steels are alloyed tool steels for the production of tools in which the surface temperature of around 200 ° Celsius is generally not exceeded. In this temperature range, the steels have high hardness, good toughness and good edge retention as well as good resistance to impact, pressure and wear.
- High-speed steels are higher-alloy tool steels that are primarily used for machining materials at high cutting speeds.
- the alloying elements chromium, cobalt, molybdenum, vanadium and tungsten or their special carbides and the heat treatment give high-speed steels high tempering resistance and hot hardness up to temperatures of 600 ° C.
- a steel of the brand DIN 1.3343 or a steel of the brand X 210 CrW 12 should be used. While the former steel 0.80 - 1.10% C, 5.50 - 6.75% W, 1.70 - 2.20% V, 3.80 - 4.50% Cr, 4.50 - 5, Contains 50% Mo and the rest Fe, the second consists of 2.00 - 2.30% C, 0.10 - 0.40% Si, 0.30 - 0.60% Mn, 11.00 - 13.00 % Cr, 0.60 - 0.80% W, balance Fe together.
- a component produced by powder metallurgical injection molding from a wear-resistant alloy tool steel is subsequently subjected to a heat treatment, such as hardening and tempering, laser hardening or nitriding. This subsequent heat treatment further improves the known good wear properties of the component.
- the wear properties of the component can be further improved by a subsequent coating process. This could be done, for example, by PVD or CVD processes.
- the component can also be subjected to additional mechanical post-processing. This can be necessary in particular if, in individual cases, precisely defined geometric dimensions have to be observed.
- An engine component manufactured according to the invention can be connected according to claim 7 to a connection structure by a joining method, such as gluing, soldering, welding, diffusion bonding or caulking.
- cam follower as a tappet for a valve train of an internal combustion engine or as a Cup tappet for a high-pressure pump drive of an internal combustion engine is formed, which is acted upon by a cam on its closed bottom.
- Such a radial piston pump generally consists of three pump pistons which are offset by 120 ° from one another and are driven by an eccentric shaft with a multiple cam. It has proven to be particularly advantageous to use cup tappets made of an alloyed tool steel between powder cams and pump pistons according to the invention by powder metallurgical injection molding, since, as already explained, these have excellent wear resistance. At this point, it is not necessary to elaborate on the structure and mode of operation of such high-pressure pumps, since they are sufficiently known to the person skilled in the art and have already been described. For example, the common rail accumulator injection system is described in detail in the magazine mot No. 11/2001, pages 13-16.
- the single figure shows a side view of a mechanical valve lifter for a valve train of an internal combustion engine, partially in section.
- the mechanical bucket tappet 1 shown in FIG. 1 has a hollow cylindrical wall 2, which is closed at one end by a base 3.
- the bottom 3 is provided with an elevation 4 which is connected to the end face of a shaft of a gas shuttle valve 5 is operatively connected.
- the bottom 3 is acted upon by a cam 6, which is arranged on a camshaft 7. It is obvious that at high speeds and high loads of modern motors, high tribological loads occur between the cam 6 and the base 3 of the bucket tappet 1, so that both parts, namely the cam 6 and also the bucket tappet 1 or the bottom 3 must have a high wear resistance with sliding friction.
- the cup tappet 1 is made from a highly wear-resistant high-speed steel with 12% tungsten, 4% molybdenum, 3% chromium, 0.6% carbon and the rest iron by means of powder metallurgical injection molding.
- the decisive advantages of such a tappet are, on the one hand, that it has good wear resistance across the entire cross-section of the material. There is therefore no risk that wear will be prone to wear over a longer service life.
- the powder metallurgical injection molding ensures that the tappet 1 can be produced in a simple manner close to the final contour, ie, also with its elevation 4 directed in the direction of the gas exchange valve.
- the cam 6, which is also produced in the manner described above by powder metallurgical injection molding. This cam 6 can then be connected to the camshaft 7, for example by a diffusion process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004028221A DE102004028221A1 (de) | 2004-06-09 | 2004-06-09 | Hochbeanspruchtes Motorenbauteil |
PCT/EP2005/005109 WO2005121383A1 (de) | 2004-06-09 | 2005-05-12 | Hochbeanspruchtes motorenbauteil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1753887A1 true EP1753887A1 (de) | 2007-02-21 |
EP1753887B1 EP1753887B1 (de) | 2011-10-05 |
Family
ID=34970195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05751295A Not-in-force EP1753887B1 (de) | 2004-06-09 | 2005-05-12 | Hochbeanspruchtes motorenbauteil |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1753887B1 (de) |
AT (1) | ATE527388T1 (de) |
DE (1) | DE102004028221A1 (de) |
WO (1) | WO2005121383A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105606366B (zh) * | 2016-03-02 | 2018-08-17 | 哈尔滨工程大学 | 一种测量气阀与气阀座动态接触载荷的装置以及标定气阀杆动态应变计的装置 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1949479U (de) | 1965-07-30 | 1966-11-10 | Fiat Spa | Fuer brennkraftmaschinen mit obenliegender nockenwell bestimmte ventilstoesselausbildung. |
DE2526656A1 (de) | 1975-06-14 | 1976-12-23 | Wizemann & Co J | Ventilstoessel |
JPS5813603B2 (ja) | 1978-01-31 | 1983-03-15 | トヨタ自動車株式会社 | 軸部材とその嵌合部材の接合法 |
JPS5918463B2 (ja) * | 1980-03-04 | 1984-04-27 | トヨタ自動車株式会社 | 耐摩耗性焼結合金およびその製法 |
DE3239325A1 (de) | 1982-10-23 | 1984-04-26 | Feldmühle AG, 4000 Düsseldorf | Ventilstoessel fuer einen verbrennungsmotor |
GB2153850B (en) | 1984-02-07 | 1987-08-12 | Nippon Piston Ring Co Ltd | Method of manufacturing a camshaft |
DE3809702A1 (de) | 1988-03-23 | 1989-10-05 | Schaeffler Waelzlager Kg | Bauteil im ventilsteuertrieb einer brennkraftmaschine |
JP2957180B2 (ja) * | 1988-04-18 | 1999-10-04 | 株式会社リケン | 耐摩耗性鉄基焼結合金およびその製造方法 |
JPH0223214A (ja) * | 1988-07-12 | 1990-01-25 | Teikoku Piston Ring Co Ltd | バルブリフタ及びその製造方法 |
DE3942091C1 (de) * | 1989-12-20 | 1991-08-14 | Etablissement Supervis, Vaduz, Li | |
DE4127639C2 (de) | 1990-11-05 | 1995-10-12 | Detlef Dr Repenning | Reibungsarme Verschleißschicht, ihre Verwendung und ihre Herstellung |
DE4205647C2 (de) | 1992-02-25 | 1996-08-01 | Schaeffler Waelzlager Kg | Verfahren zur thermochemisch-thermischen Behandlung von Einsatzstählen |
DE4314619A1 (de) | 1993-05-04 | 1994-11-10 | Schaeffler Waelzlager Kg | Stößel |
DE4418245C2 (de) | 1993-08-14 | 2003-06-18 | Ina Schaeffler Kg | Verfahren zur thermochemisch-thermischen Behandlung einer Gleitfläche eines Nockens und/oder einer Gleitfläche eines Nockengegenläufers |
US5810947A (en) | 1997-01-10 | 1998-09-22 | National Science Council | Method of surface modification for tool steels |
TW387033B (en) * | 1997-06-24 | 2000-04-11 | Honda Motor Co Ltd | Valve operating system in internal combustion engine |
US5979383A (en) * | 1999-04-23 | 1999-11-09 | General Motors Corporation | Rocker arm assembly lubrication |
JP2000310103A (ja) * | 1999-04-26 | 2000-11-07 | Nippon Piston Ring Co Ltd | ロッカーアーム |
DE10109596C2 (de) * | 2000-03-03 | 2003-11-13 | Sauer Inc | Kolben für einen hydrostatischen Zylinderblock |
JP3843207B2 (ja) * | 2000-10-04 | 2006-11-08 | 田中精密工業株式会社 | 内燃機関の動弁装置 |
JP4422405B2 (ja) | 2000-11-09 | 2010-02-24 | ヤンマー株式会社 | 蓄圧式分配型燃料噴射ポンプ |
US6660225B2 (en) * | 2000-12-11 | 2003-12-09 | Advanced Materials Technologies Pte, Ltd. | Method to form multi-material components |
DE10330673A1 (de) * | 2002-08-02 | 2005-02-03 | Bayerische Motoren Werke Ag | Schwenkhebel für einen hubvariablen Ventiltrieb |
-
2004
- 2004-06-09 DE DE102004028221A patent/DE102004028221A1/de not_active Withdrawn
-
2005
- 2005-05-12 EP EP05751295A patent/EP1753887B1/de not_active Not-in-force
- 2005-05-12 AT AT05751295T patent/ATE527388T1/de active
- 2005-05-12 WO PCT/EP2005/005109 patent/WO2005121383A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2005121383A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE527388T1 (de) | 2011-10-15 |
DE102004028221A1 (de) | 2005-12-29 |
EP1753887B1 (de) | 2011-10-05 |
WO2005121383A1 (de) | 2005-12-22 |
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