Global Patent Index - EP 1103344 A2

EP 1103344 A2 2001-05-30 - Method for machining surfaces, especially running faces of combustion-engine cylinders

Title (en)

Method for machining surfaces, especially running faces of combustion-engine cylinders

Title (de)

Verfahren zum Bearbeiten von Oberflächen, insbesondere von Zylinderlaufflächen an Brennkraftmaschinen

Title (fr)

Procédé d'usinage de surfaces, en particulier de surfaces de contact de cylindres de moteurs à combustion interne

Publication

EP 1103344 A2 (DE)

Application

EP 00122286 A

Priority

DE 19956306 A

Abstract (en)

The method proposes that after a coating of hard material containing silicon or wolfram has been applied to the cylinder surface the surface is honed. With a very fine honing tool a further honing operation takes place to expose the crystals of the harder material. A further honing then takes place to provide the surface with a microstructure finish

Abstract (de)

Die Erfindung betrifft ein Verfahren zum Bearbeiten von Oberflächen, insbesondere von Zylinderlaufflächen an Brennkraftmaschinen mit einem, aus einer Leichtmetall-Legierung bestehenden Zylinderkurbelgehäuse, wobei in die Zylinderlaufflächen, die mittels Laser aufgeschmolzen werden, Partikel eines härteren Materials einlegiert werden und wobei die Leichtmetall-Matrix mit den einlegierten Hartstoffpartikeln nachfolgend in mindestens einem Verfahrensschritt spanabhebend und/oder honend bearbeitet wird. Es wird die Aufgabe gelöst, ein Bearbeitungsverfahren zu schaffen, mit dem ein Freilegen der Partikel aus härterem Material ohne Ätzung möglich ist. Mit diesem Verfahren sollen insbesondere bei einer Serienfertigung von Brennkraftmaschinen Zylinderlaufflächen mit guten tribologischen Eigenschaften erzeugt werden. Hierfür wird vorgeschlagen, daß die Zylinderlaufflächen (1) zunächst gehont werden und daß anschließend eine weitere mechanische Bearbeitung mittels einer feinklassierten Honahle erfolgt, durch die die Kristalle (3) des härteren Materials freigelegt werden. <IMAGE>

IPC 1-7 (main, further and additional classification)

B24B 33/02; B24B 1/00

IPC 8 full level (invention and additional information)

B24B 1/00 (2006.01); B24B 33/02 (2006.01)

CPC (invention and additional information)

B24B 1/00 (2013.01); B24B 33/02 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1103344 A2 20010530; EP 1103344 A3 20031001; EP 1103344 B1 20080102; AT 382452 T 20080115; DE 19956306 A1 20010523; DE 19956306 B4 20100211; DE 50014890 D1 20080214

INPADOC legal status


2014-07-15 [REG AT MA03] REVOCATION OF THE PATENT

- Document: AT 382452 T

- Effective date: 20131223

2014-06-05 [REG DE R107] PUBLICATION OF GRANT OF EUROPEAN PATENT RESCINDED

- Document: DE 50014890

- Effective date: 20140605

2014-04-30 [27W] PATENT REVOKED

- Effective date: 20131223

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2013-12-23 [REG DE R103] PATENT REVOKED BY EPO

- Document: DE 50014890

2012-07-11 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

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