Feature-based Evaluation For Cutting Tools In Machining Ti-alloy Tructural Components

Complex integrated structure made of titanium alloy is widely used in modern aircraft structurecomponents which are as main bearing members. However, there is a lack of an effective mechanismto evaluate tool performance in advance for the tool selection in machining this kind of difficult-to-cutmaterial. In this thesis, in order to satisfy the requirements, the research on milling tool performanceevaluation technology in complex integrated structure of titanium alloy was investigated by extractingtypical features, designing appropriate standard sample, setting reasonable machining technology andevaluation index, and high performance milling test. The main research works are as follows:Firstly, analysis characters of Complex integrated structure of titanium alloy based on machiningprocess, then design a series of milling samples to evaluation tools performances.Secondly, in order to improve the processing efficiency and the machining quality, millingparameters and tool path are optimizing by analyzing the actual machining technology. Meanwhile,evaluation system and evaluation index of the cutter performance for titanium alloy are established.Thirdly, Titanium alloy high-performance experiments were conducted. Evaluation index ofcutters performance included: tool wear, cutting forces, machined surface roughness and dimensionalaccuracy. At the same time, tool material, blade types were also analysis for recommending cutterselection.Finally, stability assessment test of the blade of wsm35is carried out by bayes small sampletheory according to problem of low reliability of deep-feed milling cutter life of titanium alloy. Highaccuracy evaluation to the tool stability is realized by test of small sample.