Tham khảo tài liệu 'recent advances in mechatronics - ryszard jabonski et al (eds) episode 1 part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 304 L. Kudla 2. Microcutting techniques In general the microcutting techniques are similar to the typical cutting operations - Table. 1. Only a few of them are new technologies. They are fly-cutting microgrooving and machining on atomic force microscopes AFM machining 2 3 . The last technique is also denominated as nanomachining. The main optional realizations of kinetics are placed in the table in brackets. In some cases the rectilinear or X-Y motions are also used as the feed or infeed. Table 1. Basic kinetics of microcutting techniques Technique TURNING MILLING FLY-CUTTING DRILLING Workpart 1 1 M Tool jj fl fl fl zny fl Technique REAMING TAPPING GROOVING AFM MACHINING Workpart M flj fl Tool fl fl fl fl fl Rotation Circulation Rectilinear motion X-Y motion The tools for the microcutting have different size of dimensions. The geometry of the tool cutting part and the motions determined a form of the machined surface. By combining of more motions the shapes of almost unlimited complexity can be produced. Well known advantage of microcutting technology is the possibility to machine 3D microstructures characterized by high aspect ratio. During the microcutting processes a cutting force is highly concentrated on the fragile tool or on the workpiece. The relatively large elastic deformations of the miniaturized cutting tool and of the whole machining system could be generated. Therefore the machining forces influence machining accuracy and limit machinable size of surfaces. Moreover a very careful process execution is necessary to protect the cutting part of the tool against catastrophic destruction. Two main paths for design and fabrication of the tools for microcutting are possible. The first is downscaling of conventional tool forms and manufacturing processes. The next utilizes newly developed technologies. Design and fabrication of tools for microcutting processes 305 3. Cutting tools technology The microtools turning cutters drills mills reamers tapping tools .
