have proposed an FE model of the workpiece coupled with a geometric milling simulation for computing regenerative workpiece vibrations during the five-axis milling process. This approach can lead to minimum surface roughness by using genetic algorithm in the tangential turn-milling process, during which the value of surface roughness can be easily controlled according to cutting parameters.Д«iermann et al. in have found a cutting parameter optimization approach when machining cylindrical parts. The proposed theoretical concepts have been applied in order to obtain the best turn-milling parameters for blades.

Different strategies and tilt angles have been tested. in have focused on the study of the optimal machining strategy for blades turn-milling. By experiment techniques, some other experiments have been conducted to study the surface finish, in which mild-steel workpiece and high-speed steel cutting tools are employed. Moreover, the chips and surface quality of the former one are smaller and better than those of the latter one. This has also indicated that the roughness of orthogonal turn-milling is about ten times lower than that of turning. Choudhury and Bajpai in and Choudhury and Mangrulkar in have demonstrated by experiments that the surface roughness by orthogonal turn-milling rises with increase of cutter speed and lowers with increase of axial feed rate. Finally, they have emphasized that turn-milling can lead to a better surface roughness and is much more suitable for cutting machining than turning. Meanwhile, by their experimental work, it has been shown that there is a strong influence of vibration on turn-milling process. In their study, practical data have formed a contrast of the roughness between the centric and eccentric turn-milling under different cutting parameters. Pogacnik and Kopac in have described a complex kinematics process of this technology and the geometry of the tool and its position. The theoretical and real chip geometry is presented, respectively, in centric position and eccentric position. For the purpose of a comparative estimation of the process, a set of functions and methods are proposed and defined. have given an analysis of the suitability of turn-milling process. There are many researches on machining mechanism by turn-milling. With the rapid development of processing technology, the new machining techniques are well used to demand the requirements of product complexity and production of high-efficiency. Owing to the intermittent cuts and simultaneous rotations of tools and workpieces, it keeps low thermal stresses, lowers cutting forces, and has good removal rates.

Actually, its strengths are far more than this. So it enjoys the advantages of turning and milling and excels at machining revolving workpieces, like crankshafts or camshafts. The machining accuracy and processing efficiency are obtained by the advanced machining method.

IntroductionДЄs a newly emerging cutting technology, turn-milling makes use of the advantages of turning and milling, in which both workpiece and cutting tool are given rotary motion simultaneously. These conclusions provide theoretical foundation and reference for turn-milling mechanism research.

The rigid and flexible cutting forces are compared and the influence degrees of cutting parameters on cutting forces are analyzed. The deformation values of blade and cutter are calculated, respectively, based on the engaged trajectory by using the iterative algorithm. Aiming at the deformation properties of thin-walled blade, the predicted models of rigid cutting force and flexible cutting force with ball cutter are provided, respectively, in turn-milling process. The objective of the present work is to study cutting force by turn-milling in cutting condition. Turn-milling is regarded as the milling of a curved surface while rotating the workpiece around its center point, which combines effectively the advantages of both turning and milling, wherein it allows for good metal removal with the difficult-to-cut thin-walled workpieces in aviation.

Mill direction crossfeed