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Research on Yarn Tension under Positive Guiding by Feed Rollers

Research on Yarn Tension under Positive Guiding by Feed Rollers
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摘要 In the carpet tufting machine,feed rollers are used to guide the yarns positively.After deducing the general Euler formula of yarn tension under positive guide of rollers,a conclusion is got that the tension of yarns at the output side of each roller tends to decrease one by one.Afterwards,a computing formula of wrap angle of yarn passing through the feed roller is deduced by application of triangle geometry method.By analyzing the effect of each parameter on the yarn tension,values of the space between rollers and the roller diameter are proposed for design reference,and relations between the yarn tension and the two key parameters,the friction coefficient of roller surface and the speed of rollers,are illustrated in detail.Consequently,a policy is drawn out to control the yarn tension.The results of this paper provide not only theory foundation for empirical settings of the operational parameters of tufting machine,but also theory support for further research on yarn tension-control methods. In the carpet tufting machine, feed rollers are used to guide the yams positively. After deducing the general Euler formula of yarn tension under positive guide of rollers, a conclusion is got that the tension of yarns at the output side of each roller tends to decrease one by one. Afterwards, a computing formula of wrap angle of yarn passing through the feed roller is deduced by application of triangle geometry method. By analyzing the effect of each parameter on the yarn tension, values of the space between rollers and the roller diameter are proposed for design reference, and relations between the yarn tension and the two key parameters, the friction coefficient of roller surface and the speed of rollers, are illustrated in detail. Consequently, a policy is drawn out to control the yarn tension. The results of this paper provide not only theory foundation for empirical settings of the operational parameters of tufting machine, but also theory support for further research on yarn tension-control methods.
作者 丁彩红 唐军
出处 《Journal of Donghua University(English Edition)》 EI CAS 2010年第1期41-45,共5页 东华大学学报(英文版)
基金 Shanghai Natural Science Foundation,China(No.05ZR14004)
关键词 yarn tension Euler formula feed roller tufting machine yarn tension Euler formula feed roller tufting machine
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参考文献9

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