A contour-parallel offset （CPO） tool-path linking algorithm is derived without toolretractions and with the largest practicability. The concept of ＂tool-path loop tree＂ （TPL-tree） providing the information on th...A contour-parallel offset （CPO） tool-path linking algorithm is derived without toolretractions and with the largest practicability. The concept of ＂tool-path loop tree＂ （TPL-tree） providing the information on the parent/child relationships among the tool-path loops （TPLs） is presented. The direction, tool-path loop, leaf/branch, layer number, and the corresponding points of the TPL-tree are introduced. By defining TPL as a vector, and by traveling throughout the tree, a CPO tool-path without tool-retractions can be derived.展开更多
The temperature of powder bed is very important for selective laser sintering system(SLS),because it directly affects the quality of part.Furthermore,the temperature of powder bed should alter according to the slicing...The temperature of powder bed is very important for selective laser sintering system(SLS),because it directly affects the quality of part.Furthermore,the temperature of powder bed should alter according to the slicing section contour of model in order to ensure that the integration is successful and intelligent.Namely,the temperature of powder bed should change with shape of CAD model at different height.The paper illuminates how to distinguish the slicing contour loops from adjacent region.In this way,the temperature can be adaptively adjusted with altering of the sectional contours.展开更多
文摘A contour-parallel offset （CPO） tool-path linking algorithm is derived without toolretractions and with the largest practicability. The concept of ＂tool-path loop tree＂ （TPL-tree） providing the information on the parent/child relationships among the tool-path loops （TPLs） is presented. The direction, tool-path loop, leaf/branch, layer number, and the corresponding points of the TPL-tree are introduced. By defining TPL as a vector, and by traveling throughout the tree, a CPO tool-path without tool-retractions can be derived.
基金Sponsored by the 863 Inportant Science and Technology Subject Foundation(Grant No.2002AA6Z3081).
文摘The temperature of powder bed is very important for selective laser sintering system(SLS),because it directly affects the quality of part.Furthermore,the temperature of powder bed should alter according to the slicing section contour of model in order to ensure that the integration is successful and intelligent.Namely,the temperature of powder bed should change with shape of CAD model at different height.The paper illuminates how to distinguish the slicing contour loops from adjacent region.In this way,the temperature can be adaptively adjusted with altering of the sectional contours.
