Grinding behavior of sintered metal diamond grinding wheels with graded grain concentration

• Applicant: Professor Dr.-Ing. Berend Denkena
• Subject Area: Metal-Cutting and Abrasive Manufacturing Engineering
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 460273531

The grinding of cemented carbide milling cutter is characterized by complicated engagement conditions of the grinding tool used. When flute grinding occurs to a different specific material removal rate along the grinding wheel width, which in turn results in a locally varying degrees pronounced wear. By means of a specifically set grain concentration gradient, the single grain chip thickness along the grinding wheel width could be kept constant. Thus, a constant wear behavior could be achieved in spite of variable width across the wheel width and thus the grinding wheel surface could be optimally utilized and additional dressing cycles could be saved. Thus, advantages of the wear behavior when using grinding wheels with different grain concentration ranges have already been demonstrated. So far, existing knowledge has been limited to the grinding behavior of grinding wheels with two different zones. The manufacturing process and in particular the technical limits of the adjustable grain concentration gradient have not yet been scientifically investigated. There is also no advanced knowledge for the necessary adapted preparation for the grinding wheels. In order to close the gaps in knowledge described above, the aim of this research project is to generate knowledge about the relationships between the concentration gradient and the resulting grinding behavior of sintered metal diamond grinding wheels. It is therefore important to first derive the reproducible production of graded grinding wheels as well as a dressing process adapted to the concentration gradients. Based on field tests, models are developed that enable an application-oriented design of the grinding wheels.

• DFG Programme: Research Grants