Results 31 to 40 of about 513,317 (192)

EXPERIMENTAL RESEARCH REGARDING THE INFLUENCE OF CUTTING REGIME ON THE WEAR OF DRILLS AT STEEL PROCESSING [PDF]

open access: yesFiabilitate şi Durabilitate, 2015
This paper aims to highlight the influence of cutting regime on the wear drills at steel processing , in particular the processing of stainless steel X17CrNi16-2 SR EN 10088-4 DIN 17440. We are interested in wear of the drill at processing of this type
Leonard Marius CIUREZU GHERGHE   +3 more
doaj  

Study on monitoring tool temperature and vibration in drilling and countersinking processes with a multi-functional wireless communication tool holder system

open access: yesNihon Kikai Gakkai ronbunshu, 2018
Nowadays, a monitoring technology has attracted attention in the factory automation fields regarding IoT (Internet of Things). However, it is difficult to monitor the process information from a round tool during rotating operation in machine tools.
Ryo MATSUDA   +3 more
doaj   +1 more source

Impregnated drill bits strengthened by nanoparticles for mineral exploration drilling [PDF]

open access: yes, 2018
In order to improve the drilling efficiency and service life of impregnated diamond drill bit, WC and ZrO2 nanoparticles were introduced into traditional drill bit matrix.
Baochang, L.   +3 more
core  

Hardware/engineering battery-operated drills are more cost-effective as compared to orthopedic drills

open access: yesJournal of Orthopaedic Diseases and Traumatology, 2019
Background: Drilling of the bone is common to produce holes for screws and pin insertion, to fix the fractured parts for immobilization. For this purpose, we need a power drill machine.
Sneh Prabhakar   +4 more
doaj   +1 more source

Adjustable drill bar replaces complex jigs [PDF]

open access: yes, 1970
Adjustable drill bar incorporates a micrometer screw which, when used in conjunction with standard gage blocks, provides rapid method of drill hole location and reduces time and skill requirements for precision drilling on large surfaces. Device picks up
Coventry, J. H.
core   +1 more source

Aspects of energy requirements for rock drilling [PDF]

open access: yes, 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  

Evaluation of emergency evacuation in school buildings_ Protocol for a Systematic Review

open access: yesInternational Journal of Occupational and Environment Safety, 2019
Children are amongst the most vulnerable affected groups by natural and human-made disasters. Disaster preparedness education programs have been developed to help reduce risk and increase resilience for hazardous events.
Raquel Martins, J. Duarte, Mário Vaz
doaj   +1 more source

Preliminary Investigation into Measurement While Drilling as a Means to Characterize the Coalmine Roof

open access: yesResources, 2020
The variable nature of the coalmine roof poses a challenge to roadway stability during underground coal mining. There have been fatalities and financial losses in the coal mining industry due to roadway failures and roof falls.
Manoj Khanal   +3 more
doaj   +1 more source

Drill Based Model of Forehand Drive Practice in Table Tennis for Beginner Athlete

open access: yesActive: journal of physical education, sport, health and recreation, 2020
The purpose of study was to develop drill based model of forehand drive practice in table tennis for beginner athlete. The forehand drive had important role in table tennis playing.
Bessy Sitorus Pane   +2 more
doaj   +1 more source

PENGARUH PROJECT BASED LEARNING DENGAN METODE DRILL DAN PROJECT BASED LEARNING DENGAN METODE FEEDBACK TERHADAP HASIL BELAJAR PEMROGRAMAN WEB

open access: yesTeknologi dan Kejuruan, 2018
Tujuan penelitian adalah mengungkap perbedaan rerata hasil belajar pem­rog­raman web (ranah pengetahuan dan keterampilan) karena pengaruh penerapan PjBL dan Metode Drill dibandingkan dengan PjBL dan metode Feedback.
Syaichul Fitrian Akbar   +2 more
doaj   +1 more source

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