Results 61 to 70 of about 141,733 (202)

Torque Prediction In Deep Hole Drilling: Artificial Neural Networks Versus Nonlinear Regression Model

Applied Artificial Intelligence
One of the main challenges when drilling small and deep holes is the difficulty of chip evacuation. As the hole depth increases, chips tend to become tightly compressed, causing chip jamming.
Ngoc Hung- Chu, Hoai Nam- Nguyen, Van Du- Nguyen, Dang Binh- Nguyen   +3 more
doaj   +1 more source

Investigation of Chip Deformation and Breaking with a Staggered Teeth BTA Tool in Deep Hole Drilling

Metals, 2019
The problem of chip breaking and evacuation is the key point of staggered teeth boring and trepanning association (BTA) drilling. The factors that influence chip breaking with staggered teeth BTA deep hole drilling are analyzed by using the chip bending ...
Xubo Li, Jian-ming Zheng, Yan Li, L. Kong, Weichao Shi, B. Guo   +5 more
semanticscholar   +1 more source

The Second Deep Ice Coring at Dome Fuji, Antarctica.

Antarctic Record, 2020
The second deep ice coring project was carried out at Dome Fuji, Antarctica. Following the pilot hole drilling in 2001, deep ice core drilling was conducted for four years from the 2003/2004 austral summer season, reaching a depth of 3035.22 m in January
Hideaki Motoyama, Akiyoshi Takahashi, Yoichi Tanaka, Kunio Shinbori, Morihiro Miyahara, Takayasu Yoshimoto, Yoshiyuki Fujii, Toshitaka Suzuki, Teruo Furukawa, Kumiko Goto-Azuma, Keisuke Suzuki, Atsuhiro Muto, Makoto Igarashi, Tetsuhide Yamasaki, Shuji Fujta, Takeshi Saito, Genta Watanabe, Atsushi Furusaki, Yuanscheng Li, Chung Ji Woong, Kotaro Fukui, Fumio Nakazawa, Takao Kameda, Koji Fujita, Ichio Obinata, Takashi Saito, Kokichi Kamiyama, Jun Kinoshita, Nobuhiko Azuma, Yoshiki Nakayama, Okitsugu Watanabe, Morimasa Takata, Yukio Ozawa, Akio Kobayashi, Yasushi Yoshise   +34 more
doaj   +1 more source

Exploring surface integrity: Experimental investigation into abrasive waterjet deep hole drilling on ss 316L for biomedical applications

Journal of Alloys and Metallurgical Systems
Precision drilling of difficult-to-cut materials with exceptional surface integrity is a crucial factor in producing advanced manufactured components in industries like aviation, automotive, defense, electronic, and medical devices.
J. Bharani Chandar, N. Lenin, C. Rathinasuriyan   +2 more
doaj   +1 more source

High Plugging Capacity Drilling Fluid Technology for Deep Buried Coal-Bed Methane Drilling in Jizhong Area

Zuanjingye yu wanjingye
Horizontal drilling of deep buried coal-bed methane in Jizhong area has been faced with several difficulties and challenges such as quite limited data for reference, many geologic uncertainties, thin coal-bed layers which are easy to collapse and have ...
Yucai LUO, Huamin YU, Hao SUN, Jiantao YU, Dan FENG, Fei LIU   +5 more
doaj   +1 more source

Enhancing engagement behavior in small-diameter deep drilling through ultrasonic vibration-assisted drilling and quantitative evaluation of hole dimensions

Journal of Advanced Mechanical Design, Systems, and Manufacturing
This study investigates the effects of ultrasonic vibration-assisted drilling with a 0.3 mm diameter drill on engagement behavior and hole dimensions.
Naofumi TSUJI, Akira SAKURADA, Kota TAKASHIMA, Keisuke HARA, Hirofumi KAWAMURA, Kazuto MIYAWAKI, Hiromi ISOBE   +6 more
doaj   +1 more source

Research on dynamic appearance regularity of blow-out from drilling hole in low gas coal seam of Panxi Coal Mine

Gong-kuang zidonghua, 2019
In order to reveal dynamic appearance regularity of blow-out from drilling hole in deep low gas coal seam of Panxi Coal Mine, field tests of gas content and mining stress were carried out in 6198 working face of Panxi Coal Mine, and simulation analysis ...
NIE Fengxiang, GUO Haifeng
doaj   +1 more source

Barkhausen Noise Assessment of the Surface Conditions Due to Deep Hole Drilling and Their Influence on the Fatigue Behaviour of AISI 4140

Metals, 2018
In many technical fields, high-strength steels like AISI 4140 are commonly used for highly dynamically loaded parts. Increasing demands on weight, performance and efficiency of the automotive industry lead to increasing demands on material properties ...
N. Baak, F. Schaldach, J. Nickel, D. Biermann, F. Walther   +4 more
semanticscholar   +1 more source

Bifurcation and Stability Analyses on Stick-Slip Vibrations of Deep Hole Drilling with State-Dependent Delay

Applied Sciences, 2018
To avoid stick-slip vibration, one of the most important forms of self-excited vibrations in deep hole drilling, this paper studies the stability and bifurcation characteristics of a drilling system based on a two-degree-of-freedom discrete model.
Jianwei Huang, Ao Zhang, Hongyuan Sun, Shengwen Shi, He Li, Bangchun Wen   +5 more
doaj   +1 more source

Performance Evaluation of Electrode Materials in Electric Discharge Deep Hole Drilling of Inconel 718 Superalloy

, 2017
In the present study, electric discharge deep hole drilling of Inconel 718 was experimented with three different commercial tube electrodes viz., copper, copper-tungsten and graphite.
P. Kuppan, S. Narayanan, R. Oyyaravelu, A. Balan   +3 more
semanticscholar   +1 more source