| Along with the continuous progress advance of science and technology, the precision machining technology has been rapid development, especially for difficult-to-machine materials, it greatly improved the level of manufacturing. Titanium alloy is one of the most typical difficult-to-machine materials, and is widely used in aerospace, biomedical, ships and sports, also many other industries. With the research of precision cutting of titanium alloy, it’s of great significance for the study of the difficult-to-machine materials.The precision cutting of Titanium alloy is a complicated process, contains the thermal, mechanical and machinery and its coupling phenomenon, is a highly nonlinear problems. This paper established a finite element simulation model of Titanium alloy precision cutting on the basis of using commercial software ABAQUS.First of all, the paper analyzed the precision cutting mechanism of the titanium alloy, introduced the key technology involved in the metal cutting and simulated the process of orthogonal machining. Also studied the formation process of chips in precision cutting process, as well as cutting speed, cutting thickness and cutting tool rake angle and tool radius. Secondly, established the three-dimensional oblique cutting finite element model on the basis of the two-dimensional orthogonal cutting finite element model, then compared and explained the effect of cutting parameters on the formation chip morphology, cutting force and the distribution of machined surface residual stresses, with the change of chip morphology and cutting temperature. The results laid a foundation for the optimization and selection of cutting parameters. In the end, compared the results of the chip morphology and cutting force in the test of experiment and the finite element simulation, it verified the model of finite element simulation. |
