Results 11 to 20 of about 6,031 (262)
Hole Depth Prediction in a Femtosecond Laser Drilling Process Using Deep Learning
Micromachines, 2023 In high-aspect ratio laser drilling, many laser and optical parameters can be controlled, including the high-laser beam fluence and number of drilling process cycles.
Dong-Wook Lim +5 more
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Research and practice of high speed spiral compound drilling technology in complex weak coal seam
Meikuang Anquan, 2022 In view of the difficult problems of drilling and discharging slag and low hole forming rate in complex weak coal seam of Wangpo Coal Mine, the high speed spiral compound drilling technology is studied, and the performance characteristics of ZDY6000LR ...
LI Yingxi
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Structural Optimization and Cutting Simulation Analysis of BAT Deep-hole Drilling
Journal of Harbin University of Science and Technology, 2018 BAT deep-hole drill is a typical inner-chip removal drill. Structures and angles of tools are the main factors that influence the machining quality and machining efficiency. Because the processing of deep-hole drilling is not visible，it is very difficult
WU Xue-feng +3 more
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Meikuang Anquan, 2023 The geological structure of the deep coal seam in Qinshui Basin is relatively complex, which poses a new challenge to the control of the directional landing site of the horizontal well and the control of the drilling trajectory of the horizontal section,
WANG Yuhong, SUN Tianyu, LI Peng
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Core drilling at Syowa Station, Antarctica
Antarctic Record, 1983 The first core drilling at Syowa Station in Antarctica was carried out by the 21st Japanese Antarctic Research Expedition (JARE-21) by a rotary core drilling method using air as the drilling fluid.
Katsutada Kaminuma
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Applied Sciences, 2018 This paper presents a new approach to developing the torque model in deep hole drilling, both for conventional and ultrasonic assisted drilling processes. The model was proposed as a sum of three components: the cutting, the chip evacuation and the stick-
Ngoc-Hung Chu +7 more
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The Effects of Guide Pads on Bore Diameter Enlargement Magnitude in Deep Hole Drilling
MATEC Web of Conferences, 2016 Deep hole machining accuracy plays a crucial role in product’s quality. The results of an investigation into the machining accuracy of deep drilling holes which highlights problems of bore diameter enlargement magnitude assessment are presented in this ...
Zhang Huang +4 more
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Recognition and Application of Wear Detection BTA Deep Hole Drilling
Journal of Harbin University of Science and Technology, 2018 BAT deep-hole drill is a typical inner-chip removal drill，which is processed in a large amount and the machining process is closed． In view of the deficiency of the industrial field BTA deep hole drilling wear artificial detection error，the wear of BTA ...
WU Xue-feng +3 more
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Gong-kuang zidonghua, 2019 In order to solve problems of slow tunneling and tension of mine excavation replacement in test mine using traditional extraction technology, a scheme of using deep hole directional drilling with long directional drilling instead of conventional drilling
MA Xiaomin
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Meikuang Anquan, 2022 Aiming at the characteristics of poor cementation and broken seam in Wangpo Coal Mine, the pneumatic directional drilling test of soft-fragmentized coal seam with high-pressure nitrogen slag discharge was carried out.
SUN Yongxin +5 more
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