In the micro drilling of precision miniature holes, formation exit burrs is a topic interest, especially for ductile materials. Because such are difficult to remove, it important be able predict various burr types and employ minimisation schemes that consider burrs' micro-scale characteristics. present work, an artificial neural network (ANN) was used in copper brass, along with formation/optimisation analysis specialised drills. The influence cutting conditions, including speed, feed drill...

The purpose of this study is to develop an effective way automated deburring precision components. A high power laser proposed as a tool for complex part edges and burrs. Experimental results carbon steel stainless are presented. Also, the prediction HAZ cutting profile laser-deburred parts using finite element method presented compared with experimental results. This shows that FEM analysis can effectively predict thermal affected zone material technique be applied

Burrs formed during face milling operations can be very difficult to characterize since there exist several parameters which have complex combined effects that affect the cutting process. Many researchers attempted predict burr characteristics including size and shape, using various experimental such as speed, feed rate, in-plane exit angle, number of inserts. However, results these studies tend limited a specific process parameter range certain materials. In this paper, Taguchi...

In this study, magnetic abrasive finishing, a polishing method using novel bonded particles, is implemented in the nanometer-scale surface of STAVAX (S136) die steel workpieces, which are widely used for precision lens molds. With aid run-to-run control, process control method, mold quality achieved and maintained over multiple runs. A specially designed quill equipped with an electromagnet was connected to computer numerical machining center construct setup. Based on Preston’s equation set...

The commercialization of microfluidic fuel cells remains difficult because their low-power density. In this study, with a planar single-stack structure are proposed to improve the power stacks connect multiple in series, parallel, series–parallel, and parallel–series configurations. electrolyte flow patterns were numerically analyzed, cell performances experimentally measured platinum electrode using formic acid as fuel. With minimum size, these single provide better density than cell. stack...

Sensor feedback for process control is one of the essential elements in an automated deburring procedure. This paper presents implementation acoustic emission (AE), which has been developed as a sensing technique precision (mechanical) deburring, laser process. AE signals were sampled during machining/deburring under various experimental conditions and analyzed using several signal processing methods including rms spectral analysis. The results, such sensitivity to different cutting depths,...

Ceramics are being increasingly used in industry due to their outstanding physical and chemical properties. But these materials difficult machine by traditional machining processes because they hard brittle. Recently, as one of the various alternative processes, laser-beam is widely cutting ceramics. Although use lasers presents a number advantages over other methods, problems associated with this process uncertain formation cracks that result from thermal stresses. This paper Bayesian...

NOX emitted from heavy-duty diesel vehicles has a high percentage of domestic emissions in Korea. It is known that the NO2 emission was polluted atmospheric environments and harmful to humans. Therefore, investigation on NO2//NOX Ratio Emission Characteristics Heavy-Duty Diesel Vehicles were carried out. In this study, trucks buses measured by chassis dynamometer for vehicle real time. Also, NO2/NOX ratio characteristics analyzed analyzer according various conditions. revealed NO...

The formation of exit burrs during the drilling ductile metals such as aluminum is critical in precision manufacturing and automation. Because are difficult to remove, methods predict various burr types and/or implement minimization schemes that consider attributes must be devised. In this study, not only process conditions, including feed, cutting speed, drill diameter, but also an artificial neural network implemented aluminum-7075, which widely used aerospace automobile industries. Based...

An atomic force microscope (AFM) with suitable tips has been used for nano fabrication/nanometric machining purposes. In this paper, acoustic emission (AE) was introduced to monitor the nanometric of a brittle material (silicon) using AFM. experiments, AE responses were sampled, as tip load linearly increased (ramped load), investigate characteristics during continuous movement. By analyzing experimental results, it can be concluded that measured energy is sensitive changes in mechanism...

In this study, a novel setup for nanoscale finishing process - magnetic abrasive (MAF) was investigated together with in-process monitoring using acoustic emissions (AE). A specially fabricated direction control piece neodymium magnet attached to an MAF perform surface of thin-film (IZO) coated Pyrex glass workpieces within selective area. For the experiments, design experiment (DOE) applied optimize roughness workpieces. addition, emission (AE) sensor, which can effectively monitor and...

We investigate a surface finishing scheme fitted for AFM scratched nanopatterns on coated using magnetic abrasive (MAF). First, nanoscale patterning was carried out IZO-coated Pyrex glass, with specially-designed machining setup. After machining, nonuniform features such as pile-ups are generated, and the final shapes often more complicated materials. For this reason, MAF implemented removal of pile-up/debris materials design experiment (DOE) utilized to obtain optimal process conditions...

Atomic force microscopy is often used not only to acquire the sample surface topography at subnanometer scale but also measure forces on during imaging. This study aims develop a practical measurement scheme of actual scratching exerted atomic nanoscratching using simple optical microscope setup. The results are utilized analyze mode characteristics nanomachining. Unlike typical methods position-sensitive detector signal analysis, optically measured cantilever deformation data varying input...

In this research, a five-degree of freedom (5-d.o.f.) stitching method is proposed which implemented by calculating the 5-d.o.f. relative position and orientation between small areas 3D profile data acquired with high resolution. The calculated from overlap area for adjacent measured using least squares cross correlation function. Furthermore, synchronizing algorithm also case in specimen different instruments. To verify practical application algorithm, multi-probe optical measuring...

This paper presents a microbiochip which can detect an antigen-antibody reaction through electrical signal in real time with high sensitivity and low sample volume by using nanogold particle silver enhancement. A filtration method the microbead is adopted for immobilization. The chip composed of inexpensive biocompatible Polydimethylsiloxane (PDMS) layer Pyrex glass substrate. Platinum microelectrodes electric detection were fabricated on substrate microchannel pillar-type microfilters...

The material removal rate (MRR) during precision finishing/polishing is a key factor, which dictates the process performance. Moreover, MRR or wear closely related to material/part reliability. For nanoscale patterning and/or planarization on nano-order thickness coatings, prediction and in-process monitoring of necessary, because not characterizable due size effects property/process condition variations as result coating/substrate interactions. purpose this research was develop practical...

The goal of this research is to investigate and monitor machining mode transitions during nanoscale scratching IZO-coated Pyrex glasses using atomic force microscope (AFM). Among the AFM nanomachining features, which include elastic/plastic deformations crack generation, pile-up (by ploughing) a key surface phenomenon that can represent plastic deformation characteristics, such as sign chip making. Moreover, because formation mechanism coated materials reported be distinct from bulk...

A system for the electrical bio signal detection a microchip is proposed. Gold nanoparticles were selected their bio-compatibility and potential higher sensitivity with large surface areas. For estimation of conductivity gold nanoparticles, microchips interdigitated microelectrodes 3, 5, 7 9 ㎛ spacing fabricated. In addition, simulation program was developed to estimate resistance fabricated microchip. The results conduction show good agreements experimental data, which validate proposed system.