EP0947589A1 - Verfahren zur Bearbeitung eines Werkstücks aus Metall - Google Patents
Verfahren zur Bearbeitung eines Werkstücks aus Metall Download PDFInfo
- Publication number
- EP0947589A1 EP0947589A1 EP99103230A EP99103230A EP0947589A1 EP 0947589 A1 EP0947589 A1 EP 0947589A1 EP 99103230 A EP99103230 A EP 99103230A EP 99103230 A EP99103230 A EP 99103230A EP 0947589 A1 EP0947589 A1 EP 0947589A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- temperature
- predetermined
- spring
- value
- 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
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
Definitions
- the invention relates to a method for machining a workpiece made of metal, in particular for a motor vehicle, according to the preamble of claim 1.
- the present invention has for its object a method of the above Art to provide, with a further improvement in material properties of a treated workpiece, in particular with regard to mechanical strength is achieved.
- the workpiece is at a predetermined first Temperature warmed up and immediately after heating as long as a beam of solid particles is treated so that it is up to in an edge area a predetermined second temperature is cooled.
- the solid particles are expediently spheres and / or grains of sand, the first temperature, for example, a value in the range 500 to 600 ° C and the second Temperature, for example, a value in the range of 50 to 200 ° C, especially a value of 100 ° C.
- the metal is temper resistant steel, in particular Spring steel, and the workpiece preferred a connecting rod, an axle spring, a valve spring or a leaf spring.
- Fig. 1 shows an example as a workpiece a section of a connecting rod 10, which with the The inventive method was treated.
- the material strength by preheating for example in an oven, first decreased.
- solid particles such as For example, sand or shot peening
- the workpiece 10 is still essentially on the Preheating temperature.
- Impacting jet particles or shot grains now cause on material is still called increased plasticization of an edge layer 12, which in FIG. 1 with the depth d is shown.
- the edge layer 12 during the Blast treatment cooled faster than a core 14 inside the workpiece 10.
- the workpiece 10 is still in the preheated state at a workpiece temperature treated for example from 500 to 600 ° C with a particle beam, the Radiate a cooling of the edge layer 12 to a temperature of, for example, 100 ° C at the end of the treatment, whereas the core 14 still has a temperature of for example> 200 ° C.
- the workpiece made of, for example, temper-resistant steel, especially spring steel, is hardened, in whole or in part, in an oven atmosphere 500 to 600 ° C warmed and immediately intense particle or particle from the furnace atmosphere Shot peened until the edge temperature has dropped to approx. 100 ° C.
- the workpiece is then slowly active (e.g. cooling) or passive (e.g. heat radiation) cooled down.
- the residual compressive stresses up to have been caused by the treatment according to the invention formed in a depth of about 500 microns, as shown in Fig. 2.
- On the vertical axis 16 is an internal stress in MPa and on the horizontal axis 18 is a depth d plotted in ⁇ m.
- the residual stresses are shown as a depth profile 20 with a Area 22.
- the residual stresses from the surface increase into the Workpiece 10 first to and after passing a curve minimum (i.e. maximum internal stress).
- the Depth of the residual stress a zero crossing, i. H. it is essentially no residual stresses present.
- you can reach at conventional shot peening only depths up to 300 ⁇ m for residual stresses, d. H. of the Zero crossing of the depth profile of the residual stresses is already at a depth d of 300 ⁇ m.
- the hot blasting treatment according to the invention can also be transferred to other components, such as for example a spring (axle spring, valve spring, leaf spring), whereby one weight-optimized springs.
- a spring anle spring, valve spring, leaf spring
- the radiation at temperatures of about. ⁇ 500 ° C plastification until the surface layer 12 is colder than the core 14, which creates a favorable residual stress distribution.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
- Fig. 1
- einen mit dem erfindungsgemäßen Verfahren behandelten Pleuelstegquerschnitt und
- Fig. 2
- einen Tiefenverlauf von durch das erfindungsgemäße Verfahren in dem Werkstück erzeugten Eigenspannungen.
- 10
- Pleuelsteg
- 12
- Randschicht
- 14
- Kern
- 16
- vertikalen Achse
- 18
- horizontalen Achse
- 20
- Tiefenverlauf
- 22
- Bereich
- d
- Tiefe der Randschicht
Claims (7)
- Verfahren zum Bearbeiten eines Werkstückes aus Metall, insbesondere für ein Kraftfahrzeug,
dadurch gekennzeichnet, daß
das Werkstück auf eine vorbestimmte erste Temperatur erwärmt und unmittelbar anschließend an die Erwärmung solange derart mit einem Strahl aus Festkörperteilchen behandelt wird, daß es in einem Randbereich bis auf eine vorbestimmte zweite Temperatur abgekühlt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß
die Festkörperteilchen Kugeln und/oder Sandkörner sind. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die erste Temperatur einen Wert im Bereich 500 bis 600 °C hat. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
die zweite Temperatur einen Wert im Bereich 50 bis 200 °C, insbesondere einen Wert von weniger als 125 °C, hat. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
das Metall ein anlaßbeständiger Stahl, insbesondere Federstahl ist. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
das Werkstück ein Pleuel, eine Achsfeder, eine Ventilfeder oder eine Blattfeder ist. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
nach dem Behandeln mit Partikelstrahlen das Werkstück langsam mit einer vorbestimmten Temperaturkurve abgekühlt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19814299A DE19814299A1 (de) | 1998-03-31 | 1998-03-31 | Verfahren zum Bearbeiten eines Werkstücks aus Metall |
DE19814299 | 1998-03-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0947589A1 true EP0947589A1 (de) | 1999-10-06 |
EP0947589B1 EP0947589B1 (de) | 2002-11-27 |
Family
ID=7863044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99103230A Expired - Lifetime EP0947589B1 (de) | 1998-03-31 | 1999-02-19 | Verfahren zur Bearbeitung eines Werkstückes aus Stahl |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0947589B1 (de) |
DE (2) | DE19814299A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019034284A1 (de) * | 2017-08-17 | 2019-02-21 | Linde Aktiengesellschaft | Verfahren und vorrichtung zum verfestigungsstrahlen oder verfestigungswalzen |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19850867C2 (de) * | 1997-11-04 | 2003-10-23 | Nsk Ltd | Stufenloses Toroidgetriebe |
DE19861260B4 (de) * | 1997-11-04 | 2005-09-22 | Nsk Ltd. | Stufenlos verstellbares Toroidgetriebe |
KR101219837B1 (ko) | 2010-10-19 | 2013-01-08 | 기아자동차주식회사 | 차량 엔진용 고강도 밸브 스프링의 제조 방법 및 이에 의해 제조된 차량 엔진용 고강도 밸브 스프링 |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4526628A (en) * | 1982-04-28 | 1985-07-02 | Nhk Spring Co., Ltd. | Method of manufacturing a car stabilizer |
US4532980A (en) * | 1982-10-12 | 1985-08-06 | Yoshiharu Miyawaki | Method and apparatus for removing fine cold shut cracks on horizontally and continuously cast steel strand using ejection of a plurality of metal shots |
JPS60162727A (ja) * | 1984-02-06 | 1985-08-24 | Komatsu Ltd | 加工熱処理法 |
JPS60258409A (ja) * | 1984-06-06 | 1985-12-20 | Toyota Motor Corp | シヨツトピ−ニングによる金属の表面処理方法 |
JPS6179719A (ja) * | 1984-09-27 | 1986-04-23 | Komatsu Ltd | 加工熱処理法 |
JPS61124521A (ja) * | 1984-11-22 | 1986-06-12 | Komatsu Ltd | 加工熱処理法 |
EP0271688A1 (de) * | 1986-11-20 | 1988-06-22 | Necchi Societa Per Azioni | Verfahren zur Herstellung von Gussstücken aus bainitischem Gusseisen mit Kugelgraphit |
US4770721A (en) * | 1981-08-11 | 1988-09-13 | Aichi Steel Works, Ltd. | Process of treating steel for a vehicle suspension spring to improve sag-resistance |
EP0431224A1 (de) * | 1989-12-05 | 1991-06-12 | Horikiri Spring Mfg. Co. Ltd. | Verfahren zur Herstellung eines Blattfederblattes |
JPH0586417A (ja) * | 1991-03-30 | 1993-04-06 | Dowa Mining Co Ltd | 強度向上表面処理方法 |
US5225008A (en) * | 1991-11-18 | 1993-07-06 | Nhk Spring Co., Ltd. | Method for manufacturing a high-strength spring |
JPH0641631A (ja) * | 1992-07-23 | 1994-02-15 | Kobe Steel Ltd | ばねの強化方法 |
US5302218A (en) * | 1991-09-24 | 1994-04-12 | Mazda Motor Corporation | Surface reforming method of aluminum alloy members |
US5534088A (en) * | 1993-09-11 | 1996-07-09 | Hoesch Federn Gmbh | Method of optimizing the distribution of inherent stress in springs |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3142270C2 (de) * | 1981-10-24 | 1983-10-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Verfahren zum Verbessern der Festigkeit von Werkstückoberflächen |
DE4015205C1 (en) * | 1990-05-11 | 1991-08-22 | Mtu Muenchen Gmbh | Method of reinforcing gas turbine rotor - has balls forced against base surface of slot in rotor to compress it |
US5284039A (en) * | 1993-01-25 | 1994-02-08 | Minnesota Mining And Manufacturing Company | Spacer for rotary peening apparatus |
DE4415094B4 (de) * | 1994-04-29 | 2006-05-11 | Ald Vacuum Technologies Ag | Verfahren und Vorrichtung zum Behandeln von Werkstücken durch Partikelstrahlen |
DE19518365C2 (de) * | 1995-05-22 | 2002-03-14 | Ihd Inst Fuer Holztechnologie | Verfahren zum Glätten von Holz und Holzwerkstoffen unter Verwendung von rotierenden schneidenlosen Werkzeugen |
-
1998
- 1998-03-31 DE DE19814299A patent/DE19814299A1/de not_active Withdrawn
-
1999
- 1999-02-19 DE DE59903505T patent/DE59903505D1/de not_active Expired - Lifetime
- 1999-02-19 EP EP99103230A patent/EP0947589B1/de not_active Expired - Lifetime
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4770721A (en) * | 1981-08-11 | 1988-09-13 | Aichi Steel Works, Ltd. | Process of treating steel for a vehicle suspension spring to improve sag-resistance |
US4526628A (en) * | 1982-04-28 | 1985-07-02 | Nhk Spring Co., Ltd. | Method of manufacturing a car stabilizer |
US4532980A (en) * | 1982-10-12 | 1985-08-06 | Yoshiharu Miyawaki | Method and apparatus for removing fine cold shut cracks on horizontally and continuously cast steel strand using ejection of a plurality of metal shots |
JPS60162727A (ja) * | 1984-02-06 | 1985-08-24 | Komatsu Ltd | 加工熱処理法 |
JPS60258409A (ja) * | 1984-06-06 | 1985-12-20 | Toyota Motor Corp | シヨツトピ−ニングによる金属の表面処理方法 |
JPS6179719A (ja) * | 1984-09-27 | 1986-04-23 | Komatsu Ltd | 加工熱処理法 |
JPS61124521A (ja) * | 1984-11-22 | 1986-06-12 | Komatsu Ltd | 加工熱処理法 |
EP0271688A1 (de) * | 1986-11-20 | 1988-06-22 | Necchi Societa Per Azioni | Verfahren zur Herstellung von Gussstücken aus bainitischem Gusseisen mit Kugelgraphit |
EP0431224A1 (de) * | 1989-12-05 | 1991-06-12 | Horikiri Spring Mfg. Co. Ltd. | Verfahren zur Herstellung eines Blattfederblattes |
JPH0586417A (ja) * | 1991-03-30 | 1993-04-06 | Dowa Mining Co Ltd | 強度向上表面処理方法 |
US5302218A (en) * | 1991-09-24 | 1994-04-12 | Mazda Motor Corporation | Surface reforming method of aluminum alloy members |
US5225008A (en) * | 1991-11-18 | 1993-07-06 | Nhk Spring Co., Ltd. | Method for manufacturing a high-strength spring |
JPH0641631A (ja) * | 1992-07-23 | 1994-02-15 | Kobe Steel Ltd | ばねの強化方法 |
US5534088A (en) * | 1993-09-11 | 1996-07-09 | Hoesch Federn Gmbh | Method of optimizing the distribution of inherent stress in springs |
Non-Patent Citations (6)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 004 (C - 322) 9 January 1986 (1986-01-09) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 131 (C - 346) 15 May 1986 (1986-05-15) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 252 (C - 369) 29 August 1986 (1986-08-29) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 314 (C - 380) 24 October 1986 (1986-10-24) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 420 (C - 1093) 5 August 1993 (1993-08-05) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 268 (C - 1202) 23 May 1994 (1994-05-23) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019034284A1 (de) * | 2017-08-17 | 2019-02-21 | Linde Aktiengesellschaft | Verfahren und vorrichtung zum verfestigungsstrahlen oder verfestigungswalzen |
Also Published As
Publication number | Publication date |
---|---|
DE59903505D1 (de) | 2003-01-09 |
EP0947589B1 (de) | 2002-11-27 |
DE19814299A1 (de) | 1999-10-07 |
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