Experimental Study on Micro-Grinding Process of Titanium Alloy Using Electro-Hydro-Dynamic Spray With Nanofluid and Compressed Air

2015 ◽  
Author(s):  
Pil-Ho Lee ◽  
Jung Soo Nam ◽  
Jung Sub Kim ◽  
Sang Won Lee
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Titanium Alloy ◽  
Surface Quality ◽  
Ground Surface ◽  
Experimental Results ◽  
Compressed Air ◽  
Grinding Process ◽  
Grinding Forces ◽  
Micro Scale

In this paper, the micro-scale grinding processes of titanium alloy (Ti-6Al-4V) using electro-hydro-dynamic (EHD) spray with nanofluid and compressed air are experimentally investigated. In the experiments, specific micro-grinding forces and surface roughness of the ground workpiece are quantitatively analyzed as a function of nanofluid’s concentration and size of nanoparticles. In addition, the ground surface quality is qualitatively investigated by comparing the optical microscopic images. The experimental results show the effectiveness of EHD spraying with nanofluid and compressed air for reducing the specific micro-grinding forces and enhancing ground surface quality.

Experimental Study on a Micro-Scale Shaft Grinding Tool

2011 ◽  
Vol 121-126 ◽  
pp. 157-161
Author(s):  
Jun Cheng ◽  
Ya Dong Gong ◽  
Yue Ming Liu ◽  
Jian Yu Yang
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Particle Size ◽  
Surface Quality ◽  
Micro Scale ◽  
Grinding Tool ◽  
Micro Machine

This paper presents a novel micro shaft grinding tool is fabricated by cold sprayed with CBN grains, and a micro-grinding experiment is carried out to study micro grinding principle of the fabricated tools. The manufacturing is carried out on a desktop micro machine developed by NEU. Influences caused by particle size on surface quality has been discussed, it has been tested that low surface roughness could be achieved on 3000 particle size of micro shaft grinding tool, the roughness accomplished in the experiment is about 0.086μm.

Optimization of micro-grinding process with compressed air using response surface methodology

2011 ◽  
Vol 225 (11) ◽  
pp. 2040-2050 ◽  
Author(s):  
P-H Lee ◽  
H Chung ◽  
S W Lee
Keyword(s):  
Surface Roughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Compressed Air ◽  
Depth Of Cut ◽  
Grinding Process ◽  
Grinding Forces ◽  
Response Surface Models ◽  
Surface Models ◽  
Grinding Conditions

This paper addresses the optimization of a micro-grinding process using compressed air to minimize specific grinding forces and surface roughness while maximizing specific material removal rate (MRR). The design-of-experiments (DOE) approach and response surface methodology (RSM) are introduced to obtain the optimal grinding conditions. In the DOE approach, a central composite design approach is used for experimental design. Micro-grinding experiments are conducted, and the experimental results are used to obtain response surface models of specific grinding forces and surface roughness in terms of depth of cut, feed rate and air temperature. Multi-objective optimization is then conducted by introducing desirability functions, and the optimal values of depth of cut, feed rate and air temperature are obtained for minimum specific grinding forces and surface roughness and maximum specific MRR. The experimental results under the optimal grinding conditions are similar to those estimated from the response surface models, and thus the validity of the models is verified.

Laser Milling of Al2O3 Ceramic Based on Deteriorative Layer Controlled

2009 ◽  
Vol 83-86 ◽  
pp. 1-6
Author(s):  
Xu Yue Wang ◽  
Wen Ji Xu ◽  
Ming Kai Lei ◽  
Dong Ming Guo
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Surface Quality ◽  
Laser Scanning ◽  
Experimental Results ◽  
New Method ◽  
Ceramic Surface ◽  
Al2o3 Ceramic ◽  
Milling Parameters ◽  
Laser Milling

A new method for laser milling of Al2O3 ceramic based on deteriorative layer controlled is presented in which no assistant gas was used during the laser milling. The new milling technology is developed by means of laser scanning of ceramic surface and forming a deteriorative layer directly. Laser milling parameters are determined through crystal phase’s analysis of the deteriorative layer. The laser milling depth, surface quality, and milling mechanism with different milling parameters were studied systematically on an Nd: YAG CNC laser and multi-layer laser milling experiments were also conducted with optimized processes on the surface of Al2O3 ceramic workpiece. Therefore, the practical experimental results are that each depth of layer milling is between 0.35-0.5 mm and the surface roughness of laser milling reaches to Ra 2-3.2μm. The experimental study has thus provided deeper understanding on laser milling technology for Al2O3 ceramic both in theory and application.

scholarly journals Development of Resin Fibrous Grinding Wheels Using Twin Nozzle PELID and Analysis of Their Grinding Performance

2021 ◽  
Vol 15 (1) ◽  
pp. 49-56
Author(s):  
Satoshi Kashimura ◽  
Katsufumi Inazawa ◽  
Hitoshi Ohmori ◽  
Nobuhide Itoh ◽  
◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Effective Means ◽  
Ground Surface ◽  
Grinding Process ◽  
Grinding Wheels ◽  
Abrasive Grains ◽  
Grinding Performance ◽  
Finished Surface

The development of grinding wheels that are capable of improving the grinding accuracy and the finished surface roughness via the grinding process is increasingly sought in industries. The refinement of grinding wheels comprising abrasive grains is an effective means of improving the ground surface quality. The general methods used for fabricating grinding wheels tend to facilitate the aggregation of fine abrasive grains, resulting in poor abrasive distribution. Therefore, we focused on the electro-spinning mode of Patterning with Electrostatically Injected Droplet (PELID), which is capable of forming micro resin fibers. Subsequently, we attempted to fabricate fibrous grinding wheels containing abrasive grains by using the twin nozzle PELID technique that applies this mode. We confirmed through experiments that resin fibers containing abrasive grains can be manufactured efficiently using PELID and succeeded in manufacturing fibrous grinding wheels containing abrasive grains.

scholarly journals Effect of ultrasonic oscillations on force and surface roughness in grinding process of Ti6Al4V titanium alloy

Mechanik ◽  
2017 ◽  
Vol 90 (8-9) ◽  
pp. 769-771
Author(s):  
Janusz Porzycki ◽  
Witold Habrat ◽  
Marek Krok ◽  
Marcin Żółkoś ◽  
Marcin Sałata
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Titanium Alloy ◽  
Grinding Force ◽  
Grinding Process ◽  
Ultrasonic Oscillations ◽  
Ti6al4v Titanium Alloy ◽  
Study Results ◽  
Roughness Analysis ◽  
Force Components

The paper presents the preliminary experimental study results in grinding process of Ti6Al4V titanium alloy. The aim of this study was to determine, through grinding force components and surface roughness analysis, what effect on this process has assisting it with workpiece ultrasonic oscillations.

An Experimental Study on Grinding of SiC/Al Composites

2011 ◽  
Vol 188 ◽  
pp. 90-93 ◽  
Author(s):  
Li Fu Xu ◽  
Li Zhou ◽  
Xiao Lin Yu ◽  
Shu Tao Huang
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Surface Morphology ◽  
Ground Surface ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Feed Speed ◽  
Grinding Forces ◽  
Grinding Parameters ◽  
Sic Particles

In this paper, grinding experiments on the machining of SiCp/Al composites using SiC grinding wheel have been carried out. The effect of the grinding parameters on the grinding forces, surface morphology and surface roughness were evaluated. The results indicate that the grinding depth has more significant effect on the grinding force than that of feed speed, and there are many fracture or crushed SiC particles on the ground surface. Therefore, the SiC wheels can be used for rough grinding of SiCp/Al composites.

scholarly journals Performance of Norton Quantum Grinding Wheels

2016 ◽  
Vol 686 ◽  
pp. 125-130 ◽  
Author(s):  
Miroslav Neslušan ◽  
Jitka Baďurová ◽  
Anna Mičietová ◽  
Maria Čiliková
Keyword(s):  
Surface Roughness ◽  
Ground Surface ◽  
Bearing Steel ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Grinding Forces ◽  
Removal Rates ◽  
Surface Burn ◽  
Conventional Grinding

This paper deals with cutting ability of progressive Norton Quantum grinding wheel during grinding roll bearing steel 100Cr6 of hardness 61 HRC. Cutting ability of this wheel is compared with conventional grinding wheel and based on measurement of grinding forces as well as surface roughness. Results of experiments show that Norton Quantum grinding wheels are capable of long term grinding cycles at high removal rates without unacceptable occurrence of grinding chatter and surface burn whereas application of conventional wheel can produce excessive vibration and remarkable temper colouring of ground surface. Moreover, while Norton Quantum grinding wheel gives nearly constant grinding forces and surface roughness within ground length at higher removal rates, conventional grinding wheel (as that reported in this study) does not.

Grinding Performance of Porous Diamond Wheels on Different Materials

2011 ◽  
Vol 189-193 ◽  
pp. 3191-3197
Author(s):  
Qiu Lian Dai ◽  
Can Bin Luo ◽  
Fang Yi You
Keyword(s):  
Grain Size ◽  
Specific Energy ◽  
Experimental Results ◽  
Grinding Process ◽  
High Porosity ◽  
Grinding Forces ◽  
Abrasive Grain ◽  
Grinding Conditions ◽  
Medium Porosity ◽  
The One

In this paper, metal-bonded diamond wheels of different sized abrasive grain with different porosity were fabricated. Grinding experiments with these wheels on three kinds of materials were carried out under different grinding conditions. Experimental results revealed that wheel with high porosity (38%) had smaller grinding forces and specific energy than the one with a medium porosity (24%) on grinding G603. However, on grinding harder materials like Red granite or ceramics of Al2O3, the wheel with 38% porosity had bigger grinding forces and specific energy than the wheel with 24% porosity. Both wheels exhibited good self-sharpening capability during the grinding process of G603 and Red granite, but on grinding ceramics of Al2O3 the wheel with 38% porosity displayed in dull state during the grinding process . With the same porosity, the grinding forces of the wheel with a grain size of 230/270 US mesh were lower than the one with a grain size of W10 when grinding Red granite and ceramics of Al2O3. However revising results were obtained on grinding G603.

Experimental Investigations of the Machinability of Titanium Alloy TC4 with Different Hydrogen Contents

2011 ◽  
Vol 418-420 ◽  
pp. 1307-1311
Author(s):  
Jun Hu ◽  
Yong Jie Bao ◽  
Hang Gao ◽  
Ke Xin Wang
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Cutting Force ◽  
Hydrogen Content ◽  
Experimental Results ◽  
Cutting Conditions ◽  
Experimental Investigations ◽  
Cutting Condition ◽  
The Given

The experiments were carried out in the paper to investigate the effect of adding hydrogen in titanium alloy TC4 on its machinability. The hydrogen contents selected were 0, 0.25%, 0.49%, 0.63%, 0.89% and 1.32%, respectively. Experiments with varing hydrogen contents and cutting conditions concurrently. Experimental results showed that the cutting force of the titanium alloy can be obviously reduced and the surface roughness can be improved by adding appropriate hydrogen in the material. In the given cutting condition, the titanium alloy TC4 with 0.49% hydrogen content showed better machinability.

Experimental Investigation of Strengthening and Polishing Aeroengine Blades

2011 ◽  
Vol 101-102 ◽  
pp. 909-912
Author(s):  
Guo Ying Zeng ◽  
Deng Feng Zhao
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Fatigue Strength ◽  
Surface Quality ◽  
Three Dimensional ◽  
Experimental Results ◽  
Technological Parameters ◽  
Polishing Process ◽  
Optimum Parameters ◽  
The Media

The three-dimensional vibratory strengthening and polishing technology was used to strengthen and polish aeroengine blades with complicated surfaces. At first, the principle of the strengthening and polishing process was introduced, which combined strengthening process with polishing process. Then, the technological parameters influenced on the surface quality were investigated. The principal variables were the media hardness, the frequency and amplitude of the vibration, and duration of the vibratory strengthening and polishing. The optimum parameters were obtained. Experimental results revealed that, after strengthening and polishing, the surface roughness of aeroengine blades was reduced from Ra0.35-0.5μm to Ra0.1-0.12μm, and fatigue strength was increased by approximately 50%.

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