The use of hard and brittle material has become increasingly more extensive in recent years. Therefore processing of these materials for the parts fabrication has become a challenging problem. However, it is time-consuming to machine the hard brittle materials with the traditional metal-cutting technique that uses abrasive wheels. In addition, the tool would suffer excessive wear as well. Howev...

engineering ceramics due to high-strength-to-weight ratio, wear and corrosion resistance, and high strength temperatures, in the industries especially in aerospace, automobile, electronics and computers are used widely. in attention to the  increasingly usage process of these material, applying of conventional machining methods  for producing  machined into complex and desired shapes or making ...

Abstract The demand for high-aspect-ratio microstructures is ever increasing in the fields of microelectromechanical systems, biomedicine, aerospace, telecommunication, and heat transfer. Mechanical micromachining processes have a distinct advantage over lithography-based machining complex three-dimensional on variety materials with high accuracy surface finish. But tool-based operations face i...

Abstract –Demands of micro aspheric optical components such as lenses and mirrors are increasing for installing to the digital devices such as DVD, Digital camera, mobile phone and virtual reality system. As the devices become to be more compact and complicated, the molds shapes of lens and mirrors would become smaller and complicated, and then would become more difficult to be machined and mea...

Currently, micro-abrasive water jet machining has the problem of insufficient processing capacity in central area. To assist with improving efficiency, ultrasonic vibration is introduced. First, based on computational fluid dynamics method, mathematical model three-dimensional shape prediction micro-holes established using a mixed model, standard k-ε discrete phase and dynamic mesh model. The e...

This paper presents a new ultrasonic servo control drive for electro discharge texturing system industrial applications. The new drive is aiming to overcome the current teething issues of the existing electro discharge texturing system, servo control drive level of precision, processing stability, dynamic response and surface profile of the machined products. The new ultrasonic servo control dr...

In this study, vibration cutting has been applied to machining of a novel material, NiTi based shape memory alloy (SMA), using a commercial ultrasonic piezoelectric transducer to vibrate an ISO insert CCMT geometry cutting tool. The effect of vibration in turning process was characterized by investigating the surface roughness of workpiece and surface quality assessment of machined surface usin...

Advanced Ceramics find wide range of industrial applications. Cutting of advanced ceramic (SiC) is very difficult using conventional machining methods due to its low fracture toughness. In the past few years, researchers have claimed successful machining of ceramic composites using EDM process. Furthermore, increasing trend, necessity of miniaturization, micro components in MEMS and semiconduct...