Results 21 to 30 of about 29,165 (264)
Thermal Model of High-Speed Spindle Units
Intelligent Information Management, 2010 For the purpose to facilitate development of high-speed Spindle Units (SUs) running on rolling bearings, we have developed a beam element model, algorithms, and software for computer analysis of thermal characteristics of SUs. The thermal model incorporates a model of heat generation in rolling bearings, a model of heat transfer from bearings, and ...
Jeong-Du Kim, Igor Zverv, Keon-Beom Lee
openaire +3 more sources
Testing and Modeling of Thrust Force and Torque in Drilling Recombinant Bamboo
BioResources, 2014 Recombinant bamboo with a thickness of 15 mm was drilled on a CNC machine. The process parameters considered were spindle speed, feed rate, and diameter of the drill, and the response parameters were thrust force and torque.
Rongrong Li +4 more
doaj +1 more source
Experimental Investigation on Electrochemical Grinding (ECG) for Stainless Steel 316 [PDF]
Engineering and Technology Journal, 2020 This research focuses on material removal rate (MRR) and surface roughness during electrochemical grinding (ECG) for stainless steel 316. The effect of applied current, electrolyte concentration, gap size and spindle speed on machining performances has ...
Abdullah J. Ghadban, Abbas F. Ibrahim
doaj +1 more source
Advances in Mechanical Engineering, 2018 The dynamic properties of aerostatic spindle systems vary with the spindle speed and have a significant impact on the processing quality of ultra-precision machine tools.
Peng Chen +5 more
doaj +1 more source
Case Studies in Thermal Engineering, 2021 The high-speed motorized spindle is the core component of high-speed and high-precision machining, and its compact structure leads to internal heat accumulation and thermal deformation.
Ye Dai +6 more
doaj +1 more source
Applied Sciences, 2018 A conventional manual lathe electric motor drives the multi-stage gearbox transmitting torque to the spindle so that the workpiece makes contact with the machine tool at a given speed.
Tadeusz Mikolajczyk +7 more
doaj +1 more source
Programming spindle speed variation in turning
Eastern-European Journal of Enterprise Technologies, 2017 Разработана математическая модель и прикладная программа для моделирования возникновения регенеративных колебаний при точении в 3D пространстве. Программа предназначена для целенаправленного поиска наилучших параметров гармонического закона изменения частоты вращения шпинделя при программировании на токарном станке с числовым программным управлением ...
Petrakov, Yuriy +2 more
openaire +2 more sources
Estimating temperature distribution and heat quantity of spindle shaft for machining centers
Journal of Advanced Mechanical Design, Systems, and ManufacturingThe thermal issue of spindles for machining centers is still fundamentally unresolved. Thermal problems due to increased temperature of the spindle shaft lead to thermal displacement of the tool axis and an increase in friction torque, consequently ...
Shingo KAJIKAWA +3 more
doaj +1 more source
Effect of High Speed Milling Process Parameters on the Milling Force and Surface Topography of AM50A Magnesium Alloy [PDF]
Xibei Gongye Daxue Xuebao, 2018 Within the scope of high speed milling process parameters, analyzed and discussed the effects of spindle speed, feed rate, milling depth and milling width on milling forces in the process of high speed milling of AM50A magnesium alloy.
doaj +1 more source
Correlations between adolescent processing speed and specific spindle frequencies [PDF]
Frontiers in Human Neuroscience, 2015 Sleep spindles are waxing and waning thalamocortical oscillations with accepted frequencies of between 11 and 16 Hz and a minimum duration of 0.5 s. Our research has suggested that there is spindle activity in all of the sleep stages, and thus for the present analysis we examined the link between spindle activity (Stage 2, rapid eye movement (REM) and ...
Rebecca S. Nader +2 more
openaire +3 more sources