Grinding of Riblets on Curved Paths

Grinding of Riblets on Curved Paths

Kategorien Zeitschriften/Aufsätze (reviewed)
Jahr 2016
Autoren Denkena, B., Grove, T., Harmes, J.:
Veröffentlicht in Materials Science Forum, Vol. 874 (2016), S. 28 - 33.

The grinding of riblets with multiple profiled grinding wheels is an efficient method to minimize the fluid friction on surfaces. In turbo machinery components, like pump impellers or compressor blades, the riblets must be ground with a curved tool path since the flow is rarely linear on such surfaces. This leads to angular errors in the generated riblet profiles and therefore requires the use of grinding wheels with smaller diameters. The tool wear increases due to lateral strain on the peaks of the grinding wheel. Consequently, the increased wear and the need of smaller tool
diameters decrease the efficiency of the process. In this paper a structuring process with dicing blades was investigated in order to increase the economic viability of this process. A dressing operation for such tools is not necessary and thus reduces the non-productive time of the manufacturing process. Furthermore, profile tip wear has no negative effects on the aspect ratio of the generated riblets since the riblet geometry is determined by the thickness of the dicing blades.

DOI 10.4028/