Results 171 to 180 of about 1,368 (215)

Nano‐Engineered Basalt Fiber Composites With Halloysite Nanotubes: Durability and Drilling Behavior After Acidic Aging

Polymer Composites, EarlyView.
Schematic summary of the drilling damage and microstructural degradation mechanisms in basalt fiber‐reinforced composites after acidic aging. ABSTRACT This study investigates the drilling performance and environmental durability of basalt fiber reinforced polymer (BRC) and halloysite nanotube (HNT) modified basalt nanocomposites (BRnC) exposed to ...
İbrahim Aslan, Harun Yaka, Hasan Ulus, Halil Burak Kaybal   +3 more
wiley   +1 more source

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Spindle Speed Variation for the Suppression of Regenerative Chatter

Journal of Nonlinear Science, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Navaratnam Sri Namachchivaya, R. Beddini
openaire   +1 more source

Test procedure for very high speed spindle motors

Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting, 1995
Abstract In the last ten years, the new power electronic devices and the new control techniques have allowed to open new application fields for adjustable speed/torque electrical drives. Although the traditional dc drives keep still the market supremacy, the new ac drives have performance really attractive and some additional benefits due to the ...
BOGLIETTI, Aldo, FERRARIS P., LAZZARI M., PROFUMO, Francesco   +3 more
openaire   +2 more sources

Spindle Speed Effects on Cotton Quality

2006 Portland, Oregon, July 9-12, 2006, 2006
Three cotton varieties were grown under furrow-irrigated conditions in southern New Mexico and harvested at three different spindle speeds (1500, 2000, and 2400 rpm). Results for stalk losses, trash content, and fiber quality are presented.
null Kevin D. Baker, null S. E. Hughs
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Effects of Spindle Speed on Turning Stability

Volume 4: Dynamics, Control and Uncertainty, Parts A and B, 2012
Machining stability study for rough cuts suggests that low speeds impart instability. However, bifurcated states could be staged in between with increasing speeds. Therefore it cannot be concluded that speed increase would always result in stability. Using the cutting model presented in [1] and [2], critical DOCs are seen to increase with the increase ...
Achala V. Dassanayake, C. Steve Suh
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A speed-dependent variable preload system for high speed spindles

Precision Engineering, 2015
Abstract High speed machine tools are required to operate in a wide range of spindle rotational speeds with high stiffness and high accuracy. The stiffness of the spindle is largely dependent on the axial preload of the angular contact bearings. A large preload is required at lower range of speeds to provide sufficient stiffness for vibration-free ...
Masoud Razban, Mohammad R. Movahhedy
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Zoom Synchrosqueezing Transform for Instantaneous Speed Estimation of High Speed Spindle

Materials Science Forum, 2016
Instantaneous speed (IS) is of great significance of fault diagnosis and condition monitoring of the high speed spindle. In this paper, we propose a novel zoom synchrosqueezing transform (ZST) for IS estimation of the high speed spindle. Due to the limitation of the Heisenberg uncertainty principle, the conventional time-frequency analysis (TFA ...
Song Tao Xi, Hong Rui Cao, Xue Feng Chen
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Estimation of Axial Displacement in High-speed Spindle Due to Rotational Speed

Journal of the Korean Society of Precision Engineering, 2012
This paper presents an estimation procedure for axial displacement in spindle equipped with angular contact ball bearings due to rotational speed. High-speed spindle-bearing system experiences axial displacement due to thermal expansion and rotational speed-dependent characteristics of angular contact ball bearings.
Gyu-Hyun Bae, Chan-Hong Lee, Joo-Ho Hwang, Seong-Wook Hong   +3 more
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22—THE ACCURATE MEASUREMENT OF SPINDLE SPEED

Journal of the Textile Institute Transactions, 1933
(1933). 22—THE ACCURATE MEASUREMENT OF SPINDLE SPEED. Journal of the Textile Institute Transactions: Vol. 24, No. 5, pp. T207-T211.
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Spindle Speed Optimization for Cotton Pickers

Applied Engineering in Agriculture, 2015
Abstract. There is concern that changes to the operating speed and size of spindles on cotton picker harvesters over the years have resulted in a general decrease in cotton fiber quality, especially spindle twists, preparation, and neps. Previous research showed that spindle speeds of 3000 and 4000 rpm had more detrimental effects on picker stalk loss,
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