Investigation on Force and Temperature Distribution in Cutting Parts while Micro Milling with Monocrystalline Diamond End Mills

摘要

Micro milling with cutting parts from monocrystalline diamond (MCD) is used for the manufacturing of parts with high surface quality and high precision. Objective of the presented investigations is to figure out basic data of micro milling with diamond end mills. The paper shows results of investigations to determine forces and temperatures affecting cutting parts from MCD. MCD materials are natural diamond (MND), high pressure high temperature synthetic diamond (HSD), and chemical vapour deposition diamond (MCVDD). As work piece materials german silver, copper, brass, and aluminium are used. It is detected that minimum force values are to observe at cutting speeds of about v_c = 75 m min~(-1). Another result is that the rate of the cutting power that is effective as thermal power depends on the work piece hardness. The temperature calculation leads to the result that the surface temperature on the diamond cutting part with maximum values of □_s = 435°C does not reach the graphitization value.