Results 11 to 20 of about 168,341 (157)
Percussive-Rotary Drilling Machine
Наука и техника, 2003 The paper contains description of percussive-rotary drilling machine which is designed for hole sinking in the process of engineering and geological research.
G. T. Shiroky, M. A. Litvin
doaj +2 more sources
Aspects of energy requirements for rock drilling [PDF]
, 1974 Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core +9 more sources
Boundary-domain integro-differential equation of elastic damage mechanics model of stationary drilling [PDF]
, 2005 Copyright @ 2005 EC ...
Mikhailov, SE
core +6 more sources
Известия Томского политехнического университета: Инжиниринг георесурсов, 2021 The relevance. Hydraulic percussive mechanisms are widely used in mining and other industries. They are currently being actively improved. In particular, numerous publications argue that it is possible to control the amplitude and duration of pressure ...
Lev A. Saruev +3 more
doaj +1 more source
The rock breaking capability analyses of sonic drilling
Journal of Low Frequency Noise, Vibration and Active Control, 2021 Sonic drilling technology uses the longitudinal vibration of a drill string to realize fast and effective drilling. By setting the top and bottom boundary conditions of the drill string during drilling, a dynamic model of flexible sonic string percussive
Yonghang Qian +4 more
doaj +1 more source
Impact Dynamics of a Percussive System Based on Rotary-Percussive Ultrasonic Drill
Shock and Vibration, 2017 This paper presents an impact dynamic analysis of a percussive system based on rotary-percussive ultrasonic drill (RPUD). The RPUD employs vibrations on two sides of one single piezoelectric stack to achieve rotary-percussive motion, which improves ...
Yinchao Wang +5 more
doaj +1 more source
Intelligent optimization for a full-sized PDC bit with composite percussive rock breaking drilling
Journal of Intelligent Construction, 2023 Intelligent drilling has obtained a lot of attention in mining engineering, oil and gas production, and tunnelling engineering. The optimization of drilling parameters is one of the most important technologies of intelligent drilling while determining ...
Liping Li +7 more
doaj +1 more source
Induced drilling strains in glass fibre reinforced epoxy composites [PDF]
, 2013 Residual strains induced by drilling of glass-fibre reinforced polymers (GFRP) were determined using a hybrid experimental-numerical methodology. Experimentally, a set of GFRP specimens were drilled under well-defined tensile (calibration) stresses ...
STIFFEL, J.-H. +16 more
core +1 more source
Shock and Vibration, 2017 Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the ...
Peng Li +3 more
doaj +1 more source
Tool wear monitoring and hole surface quality during CFRP drilling [PDF]
, 2014 The present investigation focuses on the evaluation of tool wear and surface integrity in the context of CFRP cutting. Series of drilling experiments were performed on CFRP plates using cemented carbide solid drills with the aim to investigate ...
RAMIREZ, Christophe +3 more
core +1 more source