The concept of the machining surface (MS) is an approach to the process of design and manufacturing of free form surfaces. The machining surface is the surface representation of the tool path, integrating functional design specifications and machining constraints. By definition, it is a surface including all the information necessary for the driving of the tool, so that the envelope surface of the tool movement sweeping the MS gives the expected free-form. In this paper, we study the building of the MS for 5-axis end milling with usual cutting tools, hall, flat and filleted endmill. We make to that the design and manufacturing constraints taken into account by the machining surface are completely uncoupled within the MS.
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