Numerical simulation of melt ejection during the laser drilling process on aluminum alloy by millisecond pulsed laser

2016 ◽  
Author(s):  
Zhang Wei ◽  
Guangyong Jin ◽  
Yibin Wang
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Pulsed Laser ◽  
Laser Drilling ◽  
Drilling Process ◽  
Melt Ejection

Numerical simulation of different pulse width of long pulsed laser on aluminum alloy

2015 ◽  
Author(s):  
Mingxin Li ◽  
Guangyong Jin ◽  
Wei Zhang ◽  
Guibo Chen ◽  
Juan Bi
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Pulse Width ◽  
Pulsed Laser

Three-dimensional transient numerical simulation of laser drilling process

2012 ◽  
Vol 42 (8) ◽  
pp. 869-876 ◽  
Author(s):  
ZhiFu GE ◽  
ShaoXia LI ◽  
Gang YU ◽  
XiuLi HE ◽  
GuoQuan LU
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Laser Drilling ◽  
Drilling Process ◽  
Transient Numerical Simulation

Axisymmetric numerical simulation of plastic damage in aluminum alloy induced by long pulsed laser

2010 ◽  
Vol 48 (3) ◽  
pp. 361-367 ◽  
Author(s):  
Yuan Qin ◽  
Yanbei Chen ◽  
Xiaowu Ni ◽  
Zhonghua Shen ◽  
Juan Bi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Pulsed Laser ◽  
Plastic Damage

Transient Elastic and Viscoelastic Thermal Stresses During Laser Drilling of Ceramics

1998 ◽  
Vol 120 (4) ◽  
pp. 892-898 ◽  
Author(s):  
M. F. Modest
Keyword(s):  
Solid Surface ◽  
Thermal Stresses ◽  
Bending Strength ◽  
Pulsed Laser ◽  
Laser Drilling ◽  
Heat Fluxes ◽  
Temperature Fields ◽  
Drilling Process ◽  
Elastic Stresses ◽  
Viscoelastic Effects

Lasers appear to be particularly well suited to drill and shape hard and brittle ceramics, which are almost impossible to netshape to tight tolerances, and are presently machined in industry only by diamond grinding. Unfortunately, the large, focussed heat fluxes that allow the ready melting and ablation of material, also result in large localized thermal stresses within the narrow heat-affected zone, which can lead to microcracks, significant decrease in bending strength, and even catastrophic failure. In order to assess the where, when, and what stresses occur during laser drilling, that are responsible for cracks and decrease in strength, elastic and viscoelastic stress models have been incorporated into our two-dimensional drilling code. The code is able to predict temporal temperature fields as well as the receding solid surface during CW or pulsed laser drilling. Using the resulting drill geometry and temperature fields as well as the receding solid surface during CW of pulsed laser drilling. Using the resulting drill geometry and temperature field, elastic stresses as well as viscoelastic stresses are calculated as they develop and decay during the drilling process. The viscosity of the ceramic is treated as temperature-dependent, limiting viscoelastic effects to a thin layer near the ablation front where the ceramic has softened.

Fabrication of Fine Mesh Filter Screen with Pulsed Laser

2012 ◽  
Vol 516 ◽  
pp. 54-59
Author(s):  
Keiji Ogawa ◽  
Heisaburo Nakagawa ◽  
Fumiya Murase ◽  
Susumu Nishida
Keyword(s):  
Small Diameter ◽  
Pulsed Laser ◽  
Batch Process ◽  
Laser Drilling ◽  
Hole Drilling ◽  
Drilling Process ◽  
Diameter Hole ◽  
Fine Mesh ◽  
Fine Pitch ◽  
Filter Screen

This paper proposes a novel manufacturing process of a fine mesh filter screen with a pulsed laser. The fine mesh filter screen, made of stainless steel, has many small diameter holes with high aspect ratio and fine pitch. In the conventional process, an electron beam drills in a vacuum. However, this is very costly because of the expensive equipment required and batch process. Therefore, a laser drilling process for small diameter hole drilling in air with higher flexibility was proposed. The post-processes after the laser drilling completed the fine mesh filter screen.

Analysis of melt ejection during long pulsed laser drilling

2016 ◽  
Vol 25 (5) ◽  
pp. 054206 ◽  
Author(s):  
Ting-Zhong Zhang ◽  
Zhi-Chao Jia ◽  
Hai-Chao Cui ◽  
De-Hua Zhu ◽  
Xiao-Wu Ni ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Laser Drilling ◽  
Melt Ejection

Investigation on Microhole Formation Characteristics for Pulsed Laser Drilling of Aluminum Alloy 5052 Sheets

2015 ◽  
Vol 52 (12) ◽  
pp. 121402
Author(s):  
任乃飞 Ren Naifei ◽  
夏凯波 Xia Kaibo ◽  
王后孝 Wang Houxiao
Keyword(s):  
Aluminum Alloy ◽  
Pulsed Laser ◽  
Laser Drilling
Sign in / Sign up

Export Citation Format

Share Document