Micro Cutting of Biliary Stent with Nanosecond Fiber Laser System

A biliary stent cutting system based on nanosecond fiber laser was designed in this study. In order to achieve the stent cutting, the main modules and the critical technologies were analyzed. Then with the cutting system, the kerf width size was studied for different cutting parameters including laser power, repetition rate, cutting speed and assisting gas pressure. Finally, a high quality of fabricated nitinol biliary stent was achieved.

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Laser Cutting Quality of the Ceramic Slabs

Materials Science Forum ◽

10.4028/www.scientific.net/msf.505-507.847 ◽

2006 ◽

Vol 505-507 ◽

pp. 847-852 ◽

Cited By ~ 1

Author(s):

Xu Yue Wang ◽

Wen Ji Xu ◽

Ren Ke Kang ◽

Yi De Liang

Keyword(s):

Laser Power ◽

Laser Cutting ◽

Cutting Speed ◽

Cutting Parameters ◽

Incident Laser Power ◽

Focal Position ◽

Geometrical Features ◽

The Relationship ◽

Cutting System

An experimental analysis is presented which investigates the relationship between cutting parameters and the volume of material removal as well as its cutting quality on a Nd:YAG laser cutting system. The parameters that varied on two testing thickness during cutting include cutting speed, incident laser power and focal position in a continuous through cut. Various trends of the kerf geometrical features in terms of the varying process parameters are analyzed and shown to be reasonable. Discussions are also given on kerf geometry control in situations with cutting parameters. It shows that the effects of varying parameters such as cutting speed, laser power and focal position on cutting kerf width, surface roughness, and striation that have provided a deeper understanding of the laser machining.

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High Quality Fiber Laser Cutting of Electronic Alumina Ceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.154-155.917 ◽

2010 ◽

Vol 154-155 ◽

pp. 917-922 ◽

Cited By ~ 3

Author(s):

Xiao Chuan Chen ◽

Ling Fei Ji ◽

Yong Bao ◽

Yi Jian Jiang

Keyword(s):

Fiber Laser ◽

Laser Power ◽

Laser Cutting ◽

Cutting Speed ◽

Alumina Ceramics ◽

High Quality ◽

Spot Diameter ◽

Cutting Surface ◽

Power Threshold

In this paper, high quality cutting of 1 mm dense Al2O3 electronic ceramic processed by a fiber laser with spot diameter of 15 μm was reported. The narrow kerf with 30μm width was obtained with laser power of 100 W. 300 W is the laser power threshold of the kerf enlargement. Under higher laser power, the ceramics can be damage-free cut with higher cutting speed. Striation-free cutting could be achieved at 1000 W laser power with a cutting speed of 350 mm/s. The ratio of cutting speed to laser power for striation-free cutting was determined as 0.35. The black cutting surface was due to the mass tetragonal alumina induced by N2 as assist gas.

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Surface Quality of Ti-6Al-4V Titanium Alloy Parts Machined by Laser Cutting

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.3719 ◽

2020 ◽

Vol 10 (4) ◽

pp. 6062-6067

Author(s):

A. Boudjemline ◽

M. Boujelbene ◽

E. Bayraktar

Keyword(s):

Experimental Data ◽

Surface Roughness ◽

Titanium Alloy ◽

Laser Power ◽

Laser Cutting ◽

Cutting Speed ◽

Cutting Parameters ◽

Maximum Height ◽

Proposed Model

This paper investigates high power CO2 laser cutting of 5mm-thick Ti-6Al-4V titanium alloy sheets, aiming to evaluate the effects of various laser cutting parameters on surface roughness. Using multiple linear regression, a mathematical model based on experimental data was proposed to predict the maximum height of the surface Sz as a function of two laser cutting parameters, namely cutting speed and assist-gas pressure. The adequacy of the proposed model was validated by Analysis Of Variance (ANOVA). Experimental data were compared with the model’s data to verify the capacity of the proposed model. The results indicated that for fixed laser power, cutting speed is the predominant cutting parameter that affects the maximum height of surface roughness.

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A Study of Macrogeometrical Deviations in the Dry Turning of UNS R56400 Ti Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.152-154.613 ◽

2012 ◽

Vol 152-154 ◽

pp. 613-617 ◽

Cited By ~ 3

Author(s):

Jorge Salguero ◽

Julia Gerez ◽

Moisés Batista ◽

J. Enrique Garófano ◽

Mariano Marcos Bárcena

Keyword(s):

Titanium Alloy ◽

Cutting Speed ◽

Cutting Parameters ◽

Machining Process ◽

Aircraft Industry ◽

Ti Alloy ◽

Machining Processes ◽

High Quality ◽

On Line

The UNS R56400 is a Titanium alloy commonly used in the aircraft industry. This alloy can be processed by machining depending on its final application. Drilling and turning are the most usual machining processes for working this alloy. Aerospace requirements involve high quality levels and, if possible, an on-line monitoring in order to preserve the workpiece design conditions. The machining process can be monitored by different methods. One of the most single methods involves the analysis of the finishing quality of the workpieces. This analysis is usually related to micro and macro geometrical considerations. In this paper a study of the finishing quality of dry turned UNS R56400 Ti alloy has been achieved. This study has been carried out based on the analysis of straightness and parallelism deviations as functions of cutting parameters, such as feed and cutting speed.

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The Study of Bone Cutting Force with FEM

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.974.389 ◽

2014 ◽

Vol 974 ◽

pp. 389-393 ◽

Cited By ~ 1

Author(s):

Sen Liu ◽

Dong Mei Wu ◽

Jun Zhao

Keyword(s):

Finite Element ◽

Cutting Force ◽

Cutting Speed ◽

Cutting Parameters ◽

Element Model ◽

Cutting Surface ◽

On Line ◽

Force Velocity ◽

Optimization Of Cutting Parameters

In orthopedic surgery, it is easy to do harm to surrounding tissues, so the study of bone cutting is necessary. In this article, a finite element model (FEM) of orthogonal bone cutting is developed. Cutting force intra-operatively can provide the surgeon with additional on-line information to support him to control quality of cutting surface. The obtained cutting force decreased little with cutting speed increasing, but ascended evidently with cutting depth increasing. The results of finite element simulations are aimed at providing optimization of cutting parameters and the basic information for hybrid force-velocity control of a robot-assisted bone milling system.

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Surface Quality Assessment after Milling AZ91D Magnesium Alloy Using PCD Tool

Materials ◽

10.3390/ma13030617 ◽

2020 ◽

Vol 13 (3) ◽

pp. 617 ◽

Cited By ~ 3

Author(s):

Ireneusz Zagórski ◽

Jarosław Korpysa

Keyword(s):

Surface Roughness ◽

Magnesium Alloy ◽

High Speed ◽

Cutting Speed ◽

Cutting Parameters ◽

Depth Of Cut ◽

Machining Parameters ◽

Roughness Parameters ◽

Operational Parameters

Surface roughness is among the key indicators describing the quality of machined surfaces. Although it is an aggregate of several factors, the condition of the surface is largely determined by the type of tool and the operational parameters of machining. This study sought to examine the effect that particular machining parameters have on the quality of the surface. The investigated operation was the high-speed dry milling of a magnesium alloy with a polycrystalline diamond (PCD) cutting tool dedicated for light metal applications. Magnesium alloys have low density, and thus are commonly used in the aerospace or automotive industries. The state of the Mg surfaces was assessed using the 2D surface roughness parameters, measured on the lateral and the end face of the specimens, and the end-face 3D area roughness parameters. The description of the surfaces was complemented with the surface topography maps and the Abbott–Firestone curves of the specimens. Most 2D roughness parameters were to a limited extent affected by the changes in the cutting speed and the axial depth of cut, therefore, the results from the measurements were subjected to statistical analysis. From the data comparison, it emerged that PCD-tipped tools are resilient to changes in the cutting parameters and produce a high-quality surface finish.

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A Parametric Optimization on Cutting Force during Laser Assisted Machining of Inconel 718 Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.460 ◽

2015 ◽

Vol 787 ◽

pp. 460-464 ◽

Cited By ~ 1

Author(s):

M. Vignesh ◽

K. Venkatesan ◽

R. Ramanujam ◽

P. Kuppan

Keyword(s):

Cutting Force ◽

Feed Rate ◽

Inconel 718 ◽

Laser Power ◽

Laser Cutting ◽

Cutting Temperature ◽

Cutting Speed ◽

Cutting Parameters ◽

Work Piece ◽

Conventional Machining

Inconel 718, a nickel based alloys, addressed as difficult to cut material because of hard carbide particle, hardness, work hardening and low thermal conductivity. Improving the machinability characteristics of nickel based alloys is a major anxiety in aircraft, space vehicle and other manufacturing fields. This paper presents an experimental investigation in Laser assisted turning of Inconel 718 to determine the effects of laser cutting parameters on cutting temperature and cutting forces. This nickel alloy has a material hardness at 48 HRC and machined with TICN/Al2O3/TiN tool. This is employed for the manufacture of helicopter rotor blades and cryogenic storage tanks. The experiments were conducted at One-Factor-at-a-Time.The effects of laser cutting parameters, namely cutting speed, feed rate, laser power and laser to work piece angle, on the cutting temperature and cutting force components, are critically analysed and the results are compared with unassisted machining of this alloy. The experiments are conducted by varying the cutting speed at three levels (50, 75, 100 m/min), feed rate (0.05, 0.075 0.1 mm/rev), laser power (1.25 kW, 1.5 kW, 1.75 kW) and at two level laser to work piece angle (60, 75°). At the optimal parametric combinationof laser power 1.5 kW with cutting speed of 75m/min, feed rate of 0.075 mm/min and laser to work piece angle 60°, the benefit of LAM was shown by 18%, 25% and 24% decrease in feed force (Fx), thrust force (Fy) and cutting force (Fz) as compared to those of the conventional machining. Examination of the machined surface hardness profiles showed no change under LAM and conventional machining.

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Influence of cutting parameters on the quality of the cut surfaces of steel swith a laser beam

Advanced Technologies & Materials ◽

10.24867/atm-2019-1-004 ◽

2019 ◽

Vol 44 (1) ◽

pp. 21-27

Author(s):

Dobre Runchev ◽

Filip Zdraveski ◽

Irena Ivanova

Keyword(s):

Laser Beam ◽

Laser Cutting ◽

Visual Inspection ◽

Cutting Speed ◽

Base Material ◽

Cutting Parameters ◽

Thermal Cutting ◽

Materials Used ◽

Cut Surface

The main objective of the research covered in this paper is to present results for the quality of surfaces thermally cut with a laser beam. The variety of steel materials used as samples on which laser cutting is performed are the following Č.0146 (1.0330), Č.0147 (1.0333), Č.2131 (1.5024), SS Ferbec CR, HARDOX 450 and HARDOX 550. Thermal cutting is carried out with a CNC controlled Fiber laser BAYKAL type BLS–F–1530. The quality of the cut surface is analyzed based on varying the power of the laser beam, changing cutting speed and the type of additional gas (oxygen, air and nitrogen). By visual inspection, measuring the roughness of the cut surface and measuring the width of the intersection, it is determined the influence of the factors like type of the base material, type of gases, the power of thelaser beam and the cutting speed, in accordance with the standards DIN EN ISO 9013-2002 and the JUS C.T3.022.

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Study on Surface Roughness of Milling In-Situ TiB2 Particle Reinforced Al Matrix Composites

Volume 12: Advanced Materials: Design, Processing, Characterization, and Applications ◽

10.1115/imece2019-10837 ◽

2019 ◽

Author(s):

Xiao-fen Liu ◽

Wen-hu Wang ◽

Rui-song Jiang ◽

Yi-feng Xiong ◽

Kun-yang Lin ◽

...

Keyword(s):

Surface Roughness ◽

Surface Quality ◽

Feed Rate ◽

Metal Matrix ◽

Cutting Speed ◽

Cutting Parameters ◽

Matrix Composites ◽

Cutting Depth

Abstract The current state of surface roughness focuses on the 2D roughness. However, there are shortcomings in evaluating surface quality of particle reinforced metal matrix composites using 2D roughness due to the fact that the measuring direction has a vital impact on the 2D roughness value. It is therefore of great importance and significance to develop a proper criterion for measuring and evaluating the surface roughness of cutting particle reinforced metal matrix composites. In this paper, an experimental investigation was performed on the effect of cutting parameters on the surface roughness in cutting in-situ TiB2/7050Al MMCs. The 2D roughness Ra, 3D roughness Sa and Sq were comparatively studied for evaluating the machined surface quality of in-situ TiB2/7050Al MMCs. The influence of cutting parameters on the surface roughness was also analyzed. The big difference between roughness Ra measured along cutting and feed directions showed the great impact of measuring direction. Besides, surface defects such as pits, grooves, protuberances and voids were observed, which would influence 2D roughness value greatly, indicating that 3D roughness was more suitable for evaluating surface quality of cutting in-situ TiB2/7050Al MMCs. The cutting depth and feed rate were found to have the highest influence on 3D roughness while the effect of cutting speed was minimal. With increasing feed rate, cutting depth or width, the 3D roughness increased accordingly. But it decreased as cutting speed increased.

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