Abstract:

As the change of the drafting force will affect the silver quality, a set of drafting force online inspection device is self-developed with principle that is linear relationship between drafting force and stress-strain of the strain gauges in the sensor. The device can be used to accurately measure the drafting force, and then the data obtained can be used to investigate the relationship between drafting force and sliver quality. The breaker drawing experiment is carried out with rayon fibers as raw material on a mini-drawing frame. A part of the variable parameters of the drawing frame were front roller speed, front draft ratio, back draft ratio, doublings and total draft ratio. At the same time, the relationship between drafting force and sliver quality was analyzed by using the smoothing spline method. The experimental results showed that there is a great intrinsic relevance between drafting force and coefficient of variation (CV value ) of the silver, and the online inspected results of the drafting force on the draw frame can be used as an important indicator of controlling silver quality in the future.