抄録
High speed machining consists to use high speed feed rates and high frequencies of rotation in order to obtain a best finish surface integrity including geometric accuracy, surface roughness but also lower residual stresses. We are meanly interested by high speed milling. This technique is in constant development but the safety in the working environment seems to be not really studied. For example, if we assume a tool breakage by using an electro-spindle with the following characteristics : maximum rotation speed of 45000 rpm, maximum power of cut of 40 kW, and maximum tool diameter of 50 mm, the projectile is ejected with a velocity of 235 (m.s)^<-1>. Also it is necessary to determine the good choice for glazing in operator windows. An experimental investigation to assess the effect of projectile shape and velocity on the impact response of thin polycarbonate target plates was performed. Deformation and failure phenomena were observed and discussed.
