| Titanium alloy generally have many excellent properties, for example, lowdensity, high strength, good high temperature and low temperature performance,strong corrosion resistance, non-toxic and biocompatible, and so on. Titanium alloyhave so many good quality characteristics that it applied extremely broad in the fieldsof aviation, aerospace, deep-sea exploration, defense industrial, medical applicationsand other areas of industries. Titanium is a difficult to cut material, the ultra-precisionmachining technology of titanium alloy is still at an exploratory stage and don’tachieve a breakthrough, the diamond turning technology is the most likely direction toachieve ultra-precision machining titanium alloy and its research need to beintensified.This paper analyzes the difficulty and tool material requirements ofultra-precision cutting of titanium alloy. Rounded diamond cutting tools which cuttingthe minimum and maximum cutting thickness is analyzed, and the formula of cuttingmechanics arc edge cutting and straight edge cutting of titanium alloy is establishedbased on orthogonal cutting model.In this paper, the finite element analysis of titanium alloy diamond turning isproposed based on the software Advantedge. The forming process of turning chip andthe distribution of temperature are analyzed, and the influence of cutting speed, feedrate, depth of cutting are studied. Furthermore, the tool rake angle, clearance angle oncutting were studied. Finally, the cutting force and the theoretical formula arecompared during orthogonal free cutting with direct diamond cutting tool.Through the experiment, diamond face turning process of titanium alloy isstudied, as well as the effect of roughness in terms of spindle speed, feed rate anddepth of cut. Morphology of single crystal diamond cutting tool and PCD after roughturning were detected by SEM. At last, the cutting temperature is obtained for finiteelement analysis is verified experimentally. |
PDF Full Text Request