Results 11 to 20 of about 57,136 (306)
Energies, 2022 The Permian igneous rock in Shunbei Oilfield exhibits high rock strength, which results in a low rate of penetration (ROP) and shortens the cutter’s service life. It is necessary to analyze and evaluate the rock breaking effect of cutters.
Zhuoxin Dong +6 more
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Determination of Tool Profile for the Milling of Three Screw Pump Rotor [PDF]
, 2015 partially_open2The rotors of three screw pumps are commonly machined using shaped milling cutters. The determination of the exact shape of the cutter is very important, since a high precision in the machining is required to obtain a high volumetric ...
Mimmi Giovanni, Pennacchi Paolo
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The impact of tool selection on back and wrist injury risk in tying steel reinforcement bars: a single case experiment [PDF]
, 2019 The paper explores the risk of work-related musculoskeletal injury in tying steel reinforcement bars. Three tools are compared to determine the extent to which ergonomic tools can reduce the risk of injury to the back and wrist in steel-tying.
Fitzgerald, Chris +4 more
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Deviations Induced by Tool Sharpening in the Profile of Three Screw Pump Rotors [PDF]
, 1997 Three screw pumps represent an important family of positive displacement rotary pumps. They are quite easy to construct, even if the use of a shaped milling cutter for the rotor machining can cause some problems when the tool is not new.
MIMMI G., PENNACCHI P.
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Military technology in mine rescue [PDF]
Scientific Journal of the Military University of Land Forces, 2021 The sense of security is an individual’s one-sided personal expression referring to one’s awareness of existing threats and potential possibilities of their prevention.
Piotr Hałys, Piotr Kowalczyk
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Rock Breaking Mechanism and Experimental Study of Axe-shaped PDC Cutter
Shiyou jixie, 2022 Axe-shaped PDC cutter has more obvious rock breaking advantage than conventional PDC cutter. In order to analyze the rock breaking mechanism of the axe-shaped PDC cutter, the finite element simulation and test were used to conduct comparison and force ...
Zou Deyong +3 more
doaj
Profiling of a shaped worm cutter for shaping gears with non-involute tooth profile
Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, 2021 Of the mechanical transmissions used in mechanical engineering, the most common are gears with an involute profile of the teeth flanks. Gears made up of such wheels have a number of advantages, but they also have a number of significant disadvantages. Therefore jne of the current trends is the study of gears with a complex non-involute profile of the ...
Tatiana Tretyak +2 more
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Hob cutter shaping for internal straight thread
MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg>, 2021 Резьба используется во многих механизмах и достаточно часто для разъемных соединений деталей судовых машин. Для повышения долговечности внутренней цилиндрической резьбы и производительности процесса ее нарезания предлагается новая методика «профилирования червячной фрезы для нарезания внутренней цилиндрической резьбы методом огибания.
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An Experimental Study on Milling Titanium Alloy with a Revolving Cycloid Milling Cutter
Applied Sciences, 2020 In this paper, a revolving cycloid milling cutter was designed with a larger effective cutting helix angle and rake angle than a ball end milling cutter of the same diameter.
Guangyue Wang +3 more
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Design optimization of TBM disc cutters for different geological conditions [PDF]
, 2015 A novel optimization methodology for the disc cutter designs of tunnel boring machines (TBM) was presented. To fully understand the characteristics and performance of TBM cutters, a comprehensive list of performance parameters were investigated ...
Liu, Jingsheng, Xia, Yimin, Zhang, Kui
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