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.

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 and Parameters Optimization of Laser Milling on Al2O3 Ceramics

2011 ◽  
Vol 415-417 ◽  
pp. 575-579
Author(s):  
Zhao Mei Xu ◽  
Jian Zhong Zhou ◽  
Yin Bo Zhu
Keyword(s):  
Experimental Study ◽  
Surface Quality ◽  
Nd:Yag Laser ◽  
Parameters Optimization ◽  
Experimental Results ◽  
Optimal Parameters ◽  
Laser Milling ◽  
Micro Morphology

The theory of laser milling ceramics was analyzed. Experiments of laser milling were done on Al2O3 ceramics with Nd:YAG laser. The influence law on the amounts of laser milling and milling surface quality with different parameters were studied systematically and the micro-morphology of the milling surface was analyzed. The optimal parameters were obtained according to the experimental results.

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%.

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.

Assessment of Plasma Enhanced Machining for Improved Machinability of Inconel 718

1997 ◽  
Vol 119 (1) ◽  
pp. 125-129 ◽  
Author(s):  
J. W. Novak ◽  
Y. C. Shin ◽  
F. P. Incropera
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Tool Life ◽  
Cutting Forces ◽  
Inconel 718 ◽  
Experimental Results ◽  
Hybrid Machining ◽  
Machining System ◽  
Conventional Machining

An experimental study has been performed to assess the feasibility of using a hybrid machining system to improve the machinability of Inconel 718. An assembled plasma enhanced machining (PEM) system is described, and experimental results obtained from both conventional and plasma enhanced machining of Inconel 718 are compared. Several advantages of PEM over conventional machining are demonstrated, including improvement of surface roughness, lower cutting forces and extended tool life.

A Micromilling Experimental Study on AISI 4340 Steel

2009 ◽  
Vol 407-408 ◽  
pp. 335-338 ◽  
Author(s):  
Jin Sheng Wang ◽  
Da Jian Zhao ◽  
Ya Dong Gong
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Cutting Force ◽  
Spectrum Analysis ◽  
Chip Thickness ◽  
Experimental Results ◽  
Minimum Chip Thickness ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

A micromilling experimental study on AISI 4340 steel is conducted to understand the micromilling principle deeply. The experimental results, especially on the surface roughness and cutting force, are discussed in detail. It has been found the minimum chip thickness influences the surface roughness and cutting force greatly. Meanwhile, the material elastic recover induces the increase of the axial micromilling force. The average cutting force and its spectrum analysis validate the minimum chip thickness approximation of AISI 4340 is about 0.35μm.

scholarly journals Effect of laser deweighting on properties of ZL205A aluminum alloy

2021 ◽  
Vol 2137 (1) ◽  
pp. 012033
Author(s):  
Guang Li ◽  
Zhipeng Wei ◽  
Junlong Wang ◽  
Yangyang Zhang ◽  
Chen Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Aluminum Alloy ◽  
Surface Morphology ◽  
Pulse Laser ◽  
Process Parameters ◽  
Experimental Results ◽  
Matrix Properties ◽  
Before And After ◽  
The Matrix

Abstract In this paper, a nanosecond fiber pulse laser is used to carry out the experimental study on laser weight removal of ZL205A aluminum alloy gyro rotor. By optimizing the process parameters of laser weight removal, better surface morphology was obtained. The effects of surface roughness, metallographic structure and hardness of samples before and after laser deweighting were analyzed. The experimental results show that the laser weight removal does not affect the matrix properties of ZL205A aluminum alloy. The laser de-weight technology is suitable for the balance of ZL205A aluminum alloy gyro rotor.

Experimental Study Regarding Compressing Process with Assisted Friction Force

2007 ◽  
Vol 23 ◽  
pp. 177-180 ◽  
Author(s):  
Monica Sas-Boca
Keyword(s):  
Experimental Study ◽  
Density Gradient ◽  
Friction Force ◽  
Experimental Results ◽  
New Method ◽  
Powder Flow ◽  
Cold Compaction ◽  
Pressing Force ◽  
Punch Speed ◽  
Specimen Height

Friction between powder and tools plays a major role during cold compaction of PM components with results on the inhomogeneous densification. The present work deals with a new method of compaction for PM components by using the friction force between die and compacts as an active pressing force in order to reduce the density gradient. The proposal technique consists in moving the container of the die, during pressing stage to the punch direction with a well determined speed. As a result, the friction force acts in the same sense as the pressing load with better distribution of powder flow during compaction. The experimental results of compaction parameters versus density have proved the decreasing of the density gradient by increasing die/punch speed rate. A sharp density gradient on the specimen height moving container contrarily to the punch.

Experimental Study on Cutting Performance in Micro-Grinding Hard Brittle Materials

2012 ◽  
Vol 565 ◽  
pp. 541-545
Author(s):  
Ya Dong Gong ◽  
Jun Cheng ◽  
Zhi Zheng Wu ◽  
Chao Wang ◽  
Jin Feng Zhang
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Surface Quality ◽  
Feed Rate ◽  
Brittle Materials ◽  
Soda Lime ◽  
Cutting Performance ◽  
Soda Lime Glass ◽  
Grinding Speed

The process of micro-grinding on hard brittle glass is shown in this paper, micro-grinding equipments are designed by tools of electroplated diamond, fz(feed rate), ap (grinding depth), vg(Grinding speed) in micro-grinding brittle materials and their effects to surface quality have been discussed. It has been demonstrated that low surface roughness could be achieved by high vg and low fz. The roughness of Soda-lime glass accomplished by fz:100μm/s, ap:30μm, vg:120000rpm in the experiment is about 78nm.

scholarly journals Numerical And Experimental Study Of Producing Flanges On Hollow Parts By Extrusion With A Movable Sleeve

2015 ◽  
Vol 60 (3) ◽  
pp. 1917-1922 ◽  
Author(s):  
A. Gontarz ◽  
G. Winiarski
Keyword(s):  
Finite Element Method ◽  
Experimental Study ◽  
Failure Modes ◽  
Experimental Results ◽  
New Method ◽  
Special Device ◽  
The Finite Element Method ◽  
Forming Process ◽  
Forging Press ◽  
Good Agreement

Abstract The paper presents the numerical and experimental results of a new method for producing flanges on hollow parts. With this new method, the flange is extruded by a movable sleeve. This innovative technique is modelled numerically by the finite element method. The effect of workpiece and finished product geometries on the forming process is investigated and failure modes are identfied. The numerical reults are then verified in experiments. The tests are conducted using a three-slide forging press equipped with a special device. The numerical and experimental results show a good agreement, which proves that the developed method is correct.

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