Stability analysis for micro-milling nickel-based superalloy process

Abstract

Nowadays, there is strong demand for micro parts and components which are able to function properly at high temperature in the fields of aerospace, biomedicine, and energy and power. Nickel-based superalloy with good comprehensive thermal performance is well fit for the requirement of micro parts and components. Micro-milling is a novel processing technology for machining micro and high-precision parts with high temperature resistance and it can be applied to manufacture nickel-based superalloy micro parts. Nickel-based superalloy is a kind of typical difficult-to-machine material and chatter tends to occur during its micro-milling process. Chatter damages machining precision and efficiency during the process. Considering the influences of multiple regenerative effect, minimum cutting thickness, and elastic recovery of processed surface, dynamical model of micro-milling process of nickel-based superalloy is built and chatter stability is analyzed in the time domain. Based on the stability lobes, cutting parameters to avoid chatter can be gained. Consequently, machining precision and efficiency are improved.