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- W201901145 abstract "With the expanding use of automation in machining technology, the modern manufacturing aims toward achieving high productivity without close human supervision. This aim requires reliable machining processes. The chip control is one of major concern in automated machining system. It is essential for the safety of the machining operation, the maintenance of good surface finish on the machined parts, the convenience of chip disposal, and the possible power reduction. This thesis major deals with theoretical modelling for the 3-D chip curling process, including geometry and mechanics consideration. These models are then used to develop a computer animation system to simulate the process of chip curling in 3-D metal cutting. Hence the work described in this thesis is devoted to developing an effective theoretical technique for chip control in automated machining systems. Firstly, a new method to describe the development process of 3-D chip curling is developed in accord with the mechanics and kinematics characters of chip curling in 3-D machining. This analysis divided the process of 3-D chip development into different stages based on the deformation mechanism and characteristics, i.e. chip forming stage, chip curling stage, chip breaking stage, and the kinematical characters according to whether the curled chip, after leaving the rake face, hits the backwall of breaker/groove, or/and workpiece, or/and backface of tool, or/and extends along the chip breaker. Then new basic chip curling forms, up-curling, side-curling and twisting, are proposed based on the continuum mechanics theory. It reveals that a 3-D curling chip body may undergo longitudinal bending, transversal bending and torsional deformations. The analysis provides the fundament for the theoretical modelling of the 3-D chip curling and breaking. Secondly, a general geometric model of 3-D chip curling generated by typical chip breakers is developed by introducing the three-dimensional deformation state of the chip" @default.
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- W201901145 title "Theoretical modelling and animation of the chip curling process in 3-D metal cutting" @default.
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