Cutting Performance of Digital Controlled Milling A.M.B. Spindle

Recentry, The Active Magnetic Bearings are used for high speed machine tool spindle,because of its remarkable advantage such as maintenance free,high speed , and process monitoring possibility during operation. Furthemore, the high stiffness and high speed milling A. M. B. spindles have already available on the market, for example, HF200MA40A manufactured by IBAG Zürich AG with maximumspeed of 40, OOOrpm, 40kW maximum power, and HSK-50E as the tooling interface with integral dra wbar system for ATC operation. By the way, it i s possible to measure the Dynamic Stiffnass or the Campl iance of the spindle with the several tools, by means of hammering as the most traditional way. Disturbance signal injection to A. M. B. system is another possibility to estimate the Dynamic Stiffness at tool suspended by A. M. B. system. Furthemore, It is possible to measure the Cutting Force of tools by means of Digital controlled Active Magnetic Bearings. In this paper, we are reported the Cutting Force of tools on A. M. B. spindle at the several cutting condition.