Cutting tool geometry should be very much considered in micro-cutting because it has a significant effect on the topography and accuracy of the machined surface, particularly considering the uncut chip thickness is comparable to the cutting edge radius. The objective of this paper was to clarify the influence of the mechanism of the cutting tool geometry on the surface topography in the micro-m...

in this study, aluminum (al) matrix reinforced with micro-particles (30 µm) and nano-particles (50 nm) boron carbide (b4c) were used to prepare al-2.5%wt., b4c nano-composite and micro-composite, respectively, using mechanical alloying method. the mixed powders were mechanically milled at 5, 10, 15 and 20 hrs. the xrd results indicated that the crystallite sizes of both the micro-composite and ...

Integration of micro-optical elements (MOEs) with optical fiber at top-end was realized by use of focused ion beam (FIB) direct milling. The designed MOEs (micro-refractive lens, microdiffractive lens with continuous relief, and micro-gratings) were directly milled by the FIB with ion energy and ion beam current of 40 keV and 569 pA, respectively, in the core area of both single mode fiber and ...

With the rapid development of high-precision-device technology, new demands are put forward for micro milling. The size effect and low cutting energy milling make process expensive difficult, especially Ti-6Al-4V alloys. wear micro-milling cutter lacks corresponding international standards its mechanism is complex. In this paper, four kinds cutters with different states were obtained by designi...

A new analytical cutting force model is proposed for micro-end-milling operations. The model calculates the chip thickness by considering the trajectory of the tool tip while the tool rotates and moves ahead continuously. The proposed approach allows the calculation of the cutting forces to be done accurately in typical micro-end-milling operations with very aggressively selected feed per tooth...

When viewed from the size of workpieces to be cut, there are only a few machine tools that are positioned between machining centers and large machines. Therefore medium-sized workpieces are often cut by large machines. However, as the tolerance requirements for such workpieces cut by large machines have become tighter and it is difficult to achieve such tolerance only with machine performance, ...

This paper reviewed existing studies in the area of tool condition monitoring. The review revealed the substantial amount of works that have been done in the area of tool condition monitoring in machine tool. However, it was observed that investigating the feasibility of using the main spindle and feed motor currents for tool condition monitoring in micromachining has not been carried out despi...

The trend towards miniature manufacturing in high technological fields like bioengineering, electronics and aerospace has increased dramatically over the last decade. Many methods of micro have been researched applied to manufacture small scale components. Among these micro-mechanical machining shown themselves be attractive alternatives. Micro milling is one most frequently used method with po...

In recent years, a lot of research has been done in the field of producing soft magnetic nano composites by means of mechanical alloying. These materials indicate more electrical resistance and permeability in comparison with soft magnetic composites (SMCs). In this research, reduction of silicothermal mixed powder (Nickel-oxide, Silicon and Iron) was carried out by mechanical alloying to form ...