The effects of a water-mixture film adhering to solid materials on the impact contact are examined by employing exact solutions for an inhomogeneous contact problem and the Hertz impact theory. The elastic modulus of the water on a surface is assumed to be zero and the modulus of the water-mixture between a water surface and a target material varies from zero to the modulus of the target materi...

Article history: Received 15 August 2010 Received in revised form 3 December 2010 Accepted 3 December 2010 Available online 4 December 2010 In this paper, we present machining tests by turning En-31 steel alloy with tungsten carbide inserts using soluble oil-water mixture lubricant under different machining conditions. Firstorder and second-order cutting force prediction models were developed b...

The effects of cutting edge shapes on the phenomena of rubbing and ploughing in nano-abrasive machining were investigated. The shapes under investigation include flat, spherical and trapezoidal shapes. The tool with the flat end geometry shows a fast initiation of ploughing, because it has the largest surface area to engage more atoms. It doesn’t show rubbing phenomenon at the (initial) depth o...

The machining quality on computerized numerically controlled (CNC) machine tools is sensitive to the machining parameters. With modern machine tools, an operator still manually adjusts controlling parameters, such as feed rate and cutting speed. The adjusted values mainly depend on operator experience and knowledge. Standard machining catalogues and commercial cutting condition prediction softw...

Milling is one of the most common manufacturing processes in industry. Despite recent advances in machining technology, productivity in milling is usually reduced due to the process limitations such as high cutting forces and stability. If milling conditions are not selected properly, the process may result in violations of machine limitations and part quality, or reduced productivity. The usua...

Issues of industrialization of RFPE (Reference Free Part Encapsulation) are discussed in this paper. The issues are associated with three topics the location of the workpiece in the initial blank. problems related to material properties of the filler. supported RFPE technique. A new method called Adaptable Locating System (ALS) is presented in this paper. ALS consists of an array of pins which ...

As one of the tip-based top-down nanoscale machining methods, atomic force microscopy (AFM) electric lithography is capable of directly generating flexible nanostructures on conductive or semi-conductive sample surfaces. In this work, distinct fabrication mechanisms and mechanism transition from local anodic oxidation (LAO) to electrical breakdown (BD) in the AFM nanoscale electric lithography ...

Fixture imperfections influence dimensional variation on machining processes. Therefore, a systematic method to isolate fixture faults will allow improving product quality. This paper presents a diagnosis methodology to identify root causes of fixture induce workpiece variation in machining. The proposed methodology is based on designated component analysis which extracts predefined variation p...

It is a very challenging task to develop effective process control methodologies for multi-operational manufacturing processes. Although Statistical Process Control (SPC) has been widely used as the primary method in the control of quality, it mainly serves as a change detection tool rather than a method to identify root causes of process changes. This paper proposes a systematic approach to ov...