Method for machining a surface of a metal component, and metal component

Patent metadata

Field	Value
Publication number	US-10309447-B2
Application number	US-201715468686-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Mar 31, 2016
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A method for machining a surface of a metal component, in particular a connecting rod or a cam for a motor vehicle, including the following steps: providing a metal component which has a surface to be machined; premachining the surface to be machined; structuring the premachined surface by a laser beam in such a way that elevations but no depressions are formed as laser structures on the premachined surface with respect to the level thereof.

First claim

What is claimed is:

1. A method for machining a surface of a metal component, comprising:
machining a surface on a metal component and forming rectilinear structures in a circumferential direction, and
structuring the machined surface using a laser beam, wherein the machined surface is laser-structured in such a way that elevations but no depressions are formed as laser structures with respect to a level of said surface, and the elevations are arranged in a row that is orthogonal to the rectilinear structures.

2. The method as claimed claim 1 , wherein the surface is an inner surface of an aperture in the metal component, wherein the laser beam is guided in a direction orthogonal to the circumferential direction of the inner surface.

3. The method as claimed in claim 1 , wherein the laser beam is operated in a pulsed manner along at least one machining track over the surface.

4. The method as claimed in claim 3 , wherein the elevations which are formed within a machining track are formed in an overlapping manner on the surface and have an overlap of greater than or equal to 60 percent.

5. The method as claimed in claim 3 , wherein the elevations are generated in a plurality of machining tracks of respectively overlapping elevations on the surface, wherein the machining tracks are spaced apart from one another free of overlap and have a spacing of at least 50 percent of a track width of the machining tracks.

6. The method as claimed in claim 3 , wherein the metal component is a steel component, the machined steel surface of which is laser-structured with an average beam power of 9±0.5 watt.

7. The method as claimed in claim 3 , wherein the metal component is a titanium component, the machined titanium surface of which is laser-structured with an average beam power of 8±0.5 watt.

8. The method as claimed in claim 1 , wherein the elevations have a round shape.

9. The method as claimed in claim 1 , wherein the elevations have a width of less than 100 μm.

10. The method as claimed in claim 1 , wherein the elevations lave a height of less than 20 μm.

11. The method as claimed in claim 1 , wherein the surface is an inner circumferential surface and the machining on the surface generates a surface structure which is oriented in the circumferential direction of the inner circumferential surface.

12. The method as claimed in claim 11 , wherein the inner circumferential surface is laser-structured in a plurality of spaced-apart angular sections.

13. The method as claimed in claim 1 , wherein the metal component is a connecting rod for a motor vehicle.

14. The method as claimed in claim 1 , wherein a height (R) of the rectilinear structures is greater than a height (h) of the elevations.

15. The method as claimed in claim 1 , wherein a plurality of elevations are disposed between adjacent rectilinear structures.

16. The method as claimed in claim 1 , wherein the elevations are arranged in a plurality of rows and the rectilinear structures are also arranged in a plurality of rows, and the plurality of rows of elevations are orthogonal to the plurality of rows of rectilinear structures.

Assignees

• Dr Ing H C F Porsche Akteingesellschaft
• Gehring Technologies Gmbh
• Porsche Ag

Inventors

• Wels Peter
• Flores Gerhard

Classifications

• B23K26/361

  for deburring or mechanical trimming (B23K26/351 takes precedence) · CPC title

• F16C7/023 Primary

  for piston engines, pumps or the like · CPC title

• F16H53/025

  characterised by their construction, e.g. assembling or manufacturing features · CPC title

• B23K2101/006

  Vehicles · CPC title

• B23K26/362

  Laser etching · CPC title