Results 241 to 250 of about 59,140 (302)
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Melt ejection during laser drilling
ICALEO 2004: 23rd International Congress on Laser Materials Processing and Laser Microfabrication, 2004For many years, solid state lasers have been used successfully in machining processes such as drilling cooling holes in jet engine components. Nevertheless, industry demands improvements in the quality of machined features. More specifically, the drilled holes have to be more consistent in geometry, and should exhibit minimal recast layers and heat ...
de Lange, D.F. +2 more
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Underwater Laser Drilling: Drilling Underwater Granite by CO2 Laser
SPE Indian Oil and Gas Technical Conference and Exhibition, 2008Abstract The purpose of this research is to develop Underwater Laser Drilling Technology in drilling and completing oil and natural gas wells. Recent challenges in oil fields are caused by: the geometry of oil or gas wells is becoming more complicated in profile; drilling in hard formations like granite requires more tripping times for ...
Toshio Kobayashi +4 more
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Focusing for laser hole drilling
Optics and Lasers in Engineering, 1993Abstract The power intensity distribution of a laser beam across the focal plane is important for producing good hole geometry. To examine the power intensity distribution in the region of the image plane of a practical lens, a diffraction integral method is employed. Lens aberration is accounted for by the intensity of the appropriate phase changes.
Adnan Görür +2 more
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Laser‐drilled cardiovascular surgical needles
Journal of Applied Biomaterials, 1991AbstractSurgical sutures that are directly attached to the surgical needle ends are called swaged sutures. A forming tool has been used to split one‐half of the wire diameter of cardiovascular needles that forms a channel or receptacle for the suture.
M A, Towler +4 more
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SUBSURFACE LASER DRILLING APPLICATIONS
International Seminar on Nuclear War and Planetary Emergencies — 34th Session, 2006This state-of-the-art paper covers subsurface laser drilling from its early beginnings as proposed by the authors in the 1980s to our current understanding. The number of activities to which laser drilling technology can be applied is tremendous, including foundation studies, long distance tunneling and much of the environmental tasks related to ...
RICHARD A. PARKER, LORNE EVERETT
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ICALEO 2011: 30th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2011
For drilling holes such as cooling holes in tool forms or turbine blades with diameters from 100 µm up to 1.5 mm flash lamp pumped laser sources e.g. slab lasers are commonly used. These laser sources have peak powers of several kW at pulse durations from microseconds up to milliseconds with a high beam quality.
Dietrich, Jens +3 more
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For drilling holes such as cooling holes in tool forms or turbine blades with diameters from 100 µm up to 1.5 mm flash lamp pumped laser sources e.g. slab lasers are commonly used. These laser sources have peak powers of several kW at pulse durations from microseconds up to milliseconds with a high beam quality.
Dietrich, Jens +3 more
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Laser drilling: Energy partitioning
ICALEO 2001: Proceedings of the Laser Materials Processing Conference and Laser Microfabrication Conference, 2001A previously developed 1-D transient laser drilling model with variable properties is used to investigate energy partitioning during laser drilling. Energy conservation within the model is monitored by calculating the energy reflected, Er, the energy loss due to convection and radiation at the boundaries, Eloss, the energy storage, Eg, energy removal ...
Cho Lik Chan +2 more
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ICALEO '90: Proceedings of the Laser Materials Processing Conference, 1990
A new novel high speed laser drilling technique, capable of drilling up to 100 holes per second in metals will be described. This technique utilize commercial available lasers and drilling in 1-3 mm steel as well as in polymers and ruby will be described, showing aspect ratios of up to 15:1. The technique not only offers a
Flemming O. Olsen, Sven Heckermann
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A new novel high speed laser drilling technique, capable of drilling up to 100 holes per second in metals will be described. This technique utilize commercial available lasers and drilling in 1-3 mm steel as well as in polymers and ruby will be described, showing aspect ratios of up to 15:1. The technique not only offers a
Flemming O. Olsen, Sven Heckermann
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Journal of Applied Physics, 1974
Many laser drilling applications require that the shape of the drilled hole be carefully controlled. In order to successfully do this it is necessary to understand the laser drilling process. This paper reports on a quantitative model which predicts the depth and shape of a hole drilled in alumina ceramic by a ruby laser.
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Many laser drilling applications require that the shape of the drilled hole be carefully controlled. In order to successfully do this it is necessary to understand the laser drilling process. This paper reports on a quantitative model which predicts the depth and shape of a hole drilled in alumina ceramic by a ruby laser.
openaire +1 more source