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本文通过分析钛合金TC4的切削性能特点,选择不同几何结构的硬质合金刀具进行高效粗车加工实验,探索最大金属去除量的切削参数,分析TC4高效车削刀具磨损机理,优选刀具结构.结果显示,与切深相比,刀具寿命对切削速度更为敏感;适当降低切削速度而提高切深可有效提高金属去除量,在实验切削参数条件下,选择切削速度v=60 m/min,进给量f=0.3mm/r,切深ap=4 mm更有利于钛合金TC4的高效粗车加工,单个刀尖金属去除量最大;刀片前刀面的”小突起”或者”小筋条”结构可有效抑制前刀面的月牙洼磨损和粘结磨损;钛合金TC4高效粗加工刀刃要求具有一定的锋利性和刃口强度,-T槽型刀片的前角结构更有利于TC4的高效车削加工.“,”The machining characteristics of TC4 alloy was studied in this paper.In order to seek for the optimum parameters and geometry structure for maximum metal removal,the wear mechanism of tools was investigated.Highefficiency machining tests involved in carbide turning tools with different geometry structure were carried out.The results show that compared with cutting depth,the tool life is more sensitive to the cutting speed.It is a valid method that decreasing the cutting speed and increasing the cutting depth to improve the metal removal quantity.The testing parameters involving that v =60 m/min,f =0.3 mm/r and ap=4 mm are more benefit to high-efficiency machining of TC4.In these parameters,the metal removal quantity reaches to the maximum.The protruding dots or ribs on the rake face are helpful for protecting rake face from crater wear and adhered wear.The tools for high-efficiency machining of TC4 need to have strong and sharp cutting edge.Therefore,the rake structure of-T insert is more suited for high-efficiency machining TC4.