The Experts below are selected from a list of 17778 Experts worldwide ranked by ideXlab platform
Wang Shan-yuan - One of the best experts on this subject based on the ideXlab platform.
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Mathematic model of convergent point for rotor-spun composite yarn Spinning Process
Textile Research Journal, 2011Co-Authors: Wang Shan-yuanAbstract:The structure and characteristics of the composite yarn depend mainly upon where and how the two strands of fiber or filament are combined and mixed.This study established a mathematical model for static rotor-spun composite yarn Spinning Process based on mechanical analysis of the filaments,staples during composite yarn forming.Using the static model,the coordinates of convergent point under different Spinning parameters of cotton/polyester(58 tex/7.8 tex) composite yarn are calculated.The results demonstrate that the convergent point x mainly changes with the radius of the rotor,and y changes with the tension of the feeding filament.There are two yarn forming points during the Spinning Process,i.e.,the point of staple fibers twisted as yarn,and the point of the staple-fiber yarn twisted with filament as composite yarn.Therefore,technical difficulties in rotor-spun composite yarn Spinning Process can be explained theoretically with these findings.
S Y Wang - One of the best experts on this subject based on the ideXlab platform.
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A Linear Dynamic Model for Rotor-Spun Composite Yarn Spinning Process
Journal of Physics: Conference Series, 2008Co-Authors: R H Yang, S Y WangAbstract:A linear dynamic model is established for the stable rotor-spun composite yarn Spinning Process. Approximate oscillating frequencies in the vertical and horizontal directions are obtained. By suitable choice of certain Processing parameters, the mixture construction after the convergent point can be optimally matched. The presented study is expected to provide a general pathway to understand the motion of the rotor-spun composite yarn Spinning Process.
M Ghoreishi - One of the best experts on this subject based on the ideXlab platform.
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statistical analysis of dimensional changes in thermomechanical tube Spinning Process
The International Journal of Advanced Manufacturing Technology, 2011Co-Authors: A R Fazeli, M GhoreishiAbstract:Tube-Spinning Process is an effective method for manufacturing long thin-wall tubes with precision dimensions and desired mechanical property. The main objectives of this research deal with the influences of major Process parameters of thermomechanical tube-Spinning Process such as preform thickness, thickness reduction, mandrel rotational speed, feed rate of rollers, solution treatment time, and aging treatment time on internal diameter growth and wall thickness changes for manufacturing of 2024 aluminum spun tubes using design of experiments. Experimental results are analyzed by analysis of variance and empirical models of internal diameter growth and wall thickness changes are developed. It is found that lower thickness reduction with thinner preform thickness, higher feed rate of rollers, slower mandrel rotational speed, and lower solution treatment time have advantages for obtaining smaller internal diameter growth and wall thickness changes.
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Investigation of effective parameters on surface roughness in thermomechanical tube Spinning Process
International Journal of Material Forming, 2009Co-Authors: A R Fazeli, M GhoreishiAbstract:Tube Spinning Process is recognized as an effective Process for fabricating of thin wall cylindrical parts, with precision tolerances, high surface quality and desired mechanical property. In this research, the influences of major parameters of thermomechanical tube Spinning Process such as preform thickness, percentage of thickness reduction, mandrel rotational speed, feed rate of rollers, solution treatment time and aging treatment time on surface roughness for fabricating of 2024 aluminum spun tubes using design of experiments are studied. Experimental data are analyzed by analysis of variance (Anova) and empirical models of surface roughnesses are developed. It is found that deeper percentage of thickness reduction with thicker preform thickness, slower feed rate of rollers and mandrel rotational speed and higher solution treatment time and aging treatment time are advantageous for obtaining smoother surface.
Yoshiki Ono - One of the best experts on this subject based on the ideXlab platform.
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microstructure and mechanical properties of biomedical co 29cr 8mo alloy wire fabricated by a modified melt Spinning Process
Acta Materialia, 2007Co-Authors: Akihiko Chiba, Naoyuki Nomura, Yoshiki OnoAbstract:Abstract A modified in-rotating-water Spinning Process has been applied for producing the alloy wire of Ni-free Co–29Cr–8Mo suitable for biomedical use. The microstructure and tensile properties of the as-spun and heat-treated wires were investigated using backscattered electron microscopy, X-ray diffraction analyses and tensile tests. The microstructure of the as-spun wire exhibits a cellular structure and evolves into an equiaxed and fine-grained structure with an average grain size of several micrometers, containing σ-phase precipitates after heat treatment at 1373 K. Grains increase in size and reach an average diameter ranging from 10 to 20 μm at 1473 K. The crystal structure of the as-spun wire changes from face-centered cubic to strain-induced hexagonal close-packed martensite through wiredrawing. The wiredrawing, combined with heat treatments, improves the mechanical properties of the as-spun wire. The present modified melt-Spinning Process is an effective method to produce Ni-free Co–Cr–Mo alloy wire for biomedical applications.
R H Yang - One of the best experts on this subject based on the ideXlab platform.
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A Linear Dynamic Model for Rotor-Spun Composite Yarn Spinning Process
Journal of Physics: Conference Series, 2008Co-Authors: R H Yang, S Y WangAbstract:A linear dynamic model is established for the stable rotor-spun composite yarn Spinning Process. Approximate oscillating frequencies in the vertical and horizontal directions are obtained. By suitable choice of certain Processing parameters, the mixture construction after the convergent point can be optimally matched. The presented study is expected to provide a general pathway to understand the motion of the rotor-spun composite yarn Spinning Process.
