Визначення натягу нитки при її взаємодії з трубчастими спрямовувачами

Abstract

В роботі наведені результати досліджень з визначення залежності натягу нитки під час її взаємодії з направляючою поверхнею трубчастого спрямовувача нитки з урахуванням радіального кута охоплення поверхні нитки направляючою. В дослідженні враховувався нелінійний характер залежності приведеного коефіцієнту тертя від площі контакту, питомого нормального тиску на дузі охоплення напрямної. Отримані результати використовувалися для удосконалення технологічних процесів трикотажної промисловості.

The paper presents the results of studies to determine the dependence of the thread tension upon its interaction with the guiding surface of the tubular yarn guide, taking into account the radial angle of covering the surface of the guide yarn. The study takes into account the nonlinear character of the dependence of the friction coefficient on the contact area, the specific normal pressure on the arc of the guide's coverage. The obtained results were used to improve the technological processes of the knitting industry. Installations and research methods. Tubular guides are an integral part of the thread supply system of the technological equipment of the knitting industry. The absence of studies of the process of interaction of the yarn with the guide surface of the tubular yarn guide taking into account the radial angle of the surface of the guide yarn and taking into account the nonlinear character of the dependence of the friction coefficient on the contact area, the specific normal pressure on the arc of coverage does not allow to optimize the geometric dimensions of the guide, process of operation of technological equipment and increase productivity. The theoretical basis for solving the scientific and technical problem are the works of leading scientists in the branches of technology of textile and knitted productions, textile materials science, thread mechanics, the theory of elasticity, mathematical modeling. In theoretical studies, methods of theoretical mechanics, material resistance, experiment planning, and statistical processing of research results were used. Practical value. The improvement of the design of the tube guides of the yarn of knitted machines makes it possible to minimize its tension, to reduce the breakage of the yarn, which is of great importance for improving the technological processes of the knitting industry in terms of increasing the productivity of the technological equipment and the quality of the products being let out.