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Heat Conduction in Grinding

De Payrebrune K. M., Kuhnert M., Kroger M.

Machine Dynamics Research

2011

Vol. 35, No. 4

92-104

Grinding is used as finishing process to increase surface quality but also as main manufacturing operation to generate workpiece geometries. Within the contact area of workpiece and grinding wheel the material removal takes place by irregular abrasive grain engagements. The sliding movement of the grinding wheel and the tangential force component lead to rising temperatures within the workpiece. Due to that, burning or structural changes of the material can occur. This decreases the quality of the manufactured workpiece. To find stable process parameters with high efficiency, models are needed to predict the heat distribution. In this work especially the heat conduction of simple grinding processes are analyzed and predicted by an analytical solution. Temperature measurements at special points and measurements of the heat distribution are used to verify the calculations.

Investigation on the Dynamics of Tool Grinding

Payrebrune K. M., Kröger M., Deichmueller M., Denkena B.

Machine Dynamics Problems

2009

Vol. 33, No. 2

92-104

The manufacturing of high-performance carbide tools, like drills or milling cutters, is realized by a grinding process because of the strength and hardness of the used material. Due to the process forces and the cantilevering clamped workpiece, the blank bends and unwanted geometry errors occur. Additionally, great efforts are made to find optimal parameters for stable process conditions. In this work the interaction phenomena of tool grinding process and machine structure are analyzed and modelled. Thereby, the dynamic behaviour of workpiece, grinding wheel, and machine structure is experimentally investigated. Additionally, force signals of the grinding processes are measured and analyzed in time and frequency domain.