0
Research Papers

Modeling of Underwater Laser Drilling of Alumina

[+] Author and Article Information
Hong Shen

School of Mechanical Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
State Key Laboratory of Mechanical System and
Vibration,
Shanghai, 200240, China
e-mail: sh_0320@sjtu.edu.cn

Decai Feng

School of Mechanical Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China

Zhenqiang Yao

School of Mechanical Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
State Key Laboratory of Mechanical System
and Vibration,
Shanghai 200240, China

Manuscript received May 12, 2016; final manuscript received September 19, 2016; published online October 19, 2016. Assoc. Editor: Hongqiang Chen.

J. Manuf. Sci. Eng 139(4), 041008 (Oct 19, 2016) (10 pages) Paper No: MANU-16-1275; doi: 10.1115/1.4034893 History: Received May 12, 2016; Revised September 19, 2016

Laser drilling of alumina is a noncontact material processing method, which has great advantages over the traditional mechanical machining. However, the quality of laser drilling is still a challenge. In this study, a 2D transient model is developed to simulate the underwater laser drilling of alumina, considering the recoil pressure which is generated by adjusting the density of water. The distributions of the temperature, pressure, and velocity during the drilling process are examined. The numerical results show that the underwater-drilled hole with smaller taper is obtained compared with that in air, which is attributed to the recoil pressure, higher specific heat capacity, and heat transfer coefficient of water. The experimental results validate the phenomenon in numerical simulation.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic view of laser drilling process

Grahic Jump Location
Fig. 2

Underwater laser drilling of alumina

Grahic Jump Location
Fig. 3

Flowchart of computational process

Grahic Jump Location
Fig. 4

Equivalent recoil pressure: (a) calculated recoil pressure and the density of water and (b) recoil pressure resulted from adjusting the water density

Grahic Jump Location
Fig. 5

Configuration of the underwater laser drilling system

Grahic Jump Location
Fig. 6

The distribution of temperature during the underwater drilling (P = 1500 W, τ = 1 ms): (a) t = 0.001 s one pulse, (b) t = 0.05 s, (c) t = 0.101 s two pulses, (d) t = 0.15 s, (e) t = 0.201 s three pulses, and (f) t = 0.301 s four pulses

Grahic Jump Location
Fig. 7

The distributions of pressure and velocity at the third pulse (P = 1500 W, τ = 1 ms): (a) pressure and (b) velocity

Grahic Jump Location
Fig. 8

The comparison of the hole section profiles: (a) underwater and (b) in air

Grahic Jump Location
Fig. 9

The comparison of the distributions of temperature and pressure at the third pulse: (a) temperature: underwater, (b) temperature: in air, (c) molten zone: underwater, (d) molten zone: in air, (e) pressure: underwater, and (f) pressure: in air

Grahic Jump Location
Fig. 10

The comparison of the hole section profiles (P = 1500 W, τ = 1 ms): (a) underwater and (b) in air

Grahic Jump Location
Fig. 11

The diameters of the underwater drilled hole (P = 1500 W, τ = 1 ms): (a) the entrance and (b) the exit

Grahic Jump Location
Fig. 12

Entrance diameter, exit diameter, and hole taper with different pulse widths (10 pulses): (a) underwater and (b) in air

Grahic Jump Location
Fig. 13

Comparison of hole section profiles drilled: (a) in air and (b) underwater

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In