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| Freeform surface machining ： ウィキペディア英語版 |
Freeform surface machining
Freeform surface or complex surfaces are widely manufactured nowadays. The industries which most often manufactures free-form surfaces are basically aerospace, automotive, die mold industries, bio medical and power sector for turbine blades manufacturing. Generally 3 or 5 axis CNC milling machine is used for this purpose. The manufacturing process of free form surface is not an easy job as the tool path generation in present CAM technology is generally based on geometric computation so tool path are not optimum. The geometry can also be not described explicitly so errors and discontinuities occurrence in the solid structure cannot be avoided. Free-form surfaces are machined with the help of different tool path generation method like adaptive iso-planar tool path generation, constant scallop tool path generation, adaptive iso-parametric method, iso-curvature, isophote and by other methods. The different methods are chosen based on the parameters which is needed to be optimized.
==Different tool path generation methods==
# Iso-planar tool path method: This is the most common and robust method used to machine free-form surface. In this process the generation of tool path is done by intersection of surfaces with parallel plane in Cartesian space.
# Adaptive iso-planar tool path method: In this process the surface are partitioned into different regions according to their slope with the intersection planes by applying the concept of isophote.
# Iso-scallop method: Scallop generated between two adjacent machining path is constant.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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