Results 81 to 90 of about 177 (131)
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A new model of percussion laser drilling
International Journal of Computer Applications in Technology, 2006Manufacturing industries in strategic and other hi-tech areas are increasingly using the percussion mode of laser drilling for component development. In this paper, the optothermal effects of laser-metal interaction are analysed from a modelling viewpoint.
N. D. Pandey, H. S. Shan, T. Mohandas
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Dry Friction Model of Percussive Drilling
Meccanica, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Krivtsov, Anton M., Wiercigroch, Marian
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2001
Commercial percussion drilling machines possess for their operation in the percussion drill mode two cam disks with some teeth. By moving the upper disk at the motor side with constant angular speed, for example, and by pressing the drill into the material, a hammering process is started that consists of a combined drill/impact motion. Machines of that
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Commercial percussion drilling machines possess for their operation in the percussion drill mode two cam disks with some teeth. By moving the upper disk at the motor side with constant angular speed, for example, and by pressing the drill into the material, a hammering process is started that consists of a combined drill/impact motion. Machines of that
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1971
Abstract The theoretical mechanics of the percussive drilling of rock are developed from analysis of stress-wave interactions in the drilling system. Particular attention is given to 1. (i) the efficiency of impact energy transfer from drill steel to rock, and 2. (ii) the minimum thrust force needed to ensure bit-rock contact at the beginning
W.A. Hustrulid, C. Fairhurst
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Abstract The theoretical mechanics of the percussive drilling of rock are developed from analysis of stress-wave interactions in the drilling system. Particular attention is given to 1. (i) the efficiency of impact energy transfer from drill steel to rock, and 2. (ii) the minimum thrust force needed to ensure bit-rock contact at the beginning
W.A. Hustrulid, C. Fairhurst
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Embedded Drilling System Using Rotary-Percussion Drilling
2018The drilling technology is widely used in various fields. This technology has been developed explosively by large companies. However, most of the conventional drilling systems require large equipment such as rig and mud systems. This makes it difficult for drilling in polar or space environments where large equipment is hard to enter or carry. To solve
Jongheon Kim, Jinkwang Kim, Hyun Myung
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Percussion Drilling…Is It a Lost Technique? A Review.
Permian Basin Oil and Gas Recovery Conference, 1996Abstract This paper presents a review of the benefits and performance of downhole percussion hammers. The advancement of drilling technology and the extensive use of coiled tubing coupled with different downhole motors prompted another look at the percussion type of drills.
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Automatic Control in Percussion Drilling
IFAC Proceedings Volumes, 1976Abstract A committee within the Swedish Mining Research has evaluated automation of percussion drilling and given a priority list for the different operations, based upon the influence of automation on costs, capacity and ergonomics. The paper gives a survey of the present situation regarding mechanization and automation of feed control, stop and ...
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Rotary Percussion and Auger Drilling
2010In rotary percussion drilling, a variety of blade or roller bits (Fig. 5.2) mounted on the end of a rotating string of rods cut and break the rock. A percussion or hammer action in conjunction with a chisel bit can be used to penetrate hard material.
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A study of penetration by percussive drills.
1971This item was digitized as part of a project to share McGill's intellectual legacy with the public. If you are the copyright holder or a relative of the copyright holder who is deceased, you may request withdrawal by emailing escholarship.library@mcgill.ca.
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