Development of Multi-grit cBN Grinding Wheel for Crankshaft Grinding
Licentiatavhandling, 2019
A series of grinding trails have been used to correlate the grit properties with the grinding performance. The two evaluated grit characteristics are newly proposed aspect ratio (đŽđ ) and the concentration in the grinding wheel. The results show that blockier particles (lowerđŽđ ) generate high forces and lower grinding wheel wear. On the other hand, the elongated particles require less power for grinding and act more free-cutting, improving the grindability. Further trials using higher concentration grinding wheels, exhibit similar behavior as grit(s) with lower đŽđ . The two properties that are driving this performance are the contact area between the grinding wheel and the workpiece and the undeformed maximum chip thickness âđ which changes with process and wheel design parameters.
automotive
cBN
grinding
vitrified bond
grit shape
grit concentration
morphology
aspect ratio
crankshaft
grinding wheels
Författare
Nastja Macerol
Chalmers, Industri- och materialvetenskap, Material och tillverkning
Ämneskategorier
Annan teknik
Bearbetnings-, yt- och fogningsteknik
Styrkeområden
Materialvetenskap
Utgivare
Chalmers
Hörsalsvägen 7a (5th floor)
Opponent: Associate Professor Eraldo Jannone da Silva, University of Sao Paulo, Sao Carlos School of Engineering, Brazil