Bus real-time weft tension automatic adjusting device and method

Abstract

The invention relates to a bus real-time weft tension automatic adjusting device and method. A distance adjusting sliding block is installed on a distance adjusting slide, and a zonal slide is arranged on the distance adjusting sliding block. A distance adjusting motor is fixed onto the distance adjusting slide and drives the distance adjusting sliding block to move. A tension adjusting sliding block is installed on the zonal slide. A tension adjusting motor is fixed onto the distance adjusting sliding block and drives the tension adjusting sliding block to move. A fixed rod is fixed onto the tension adjusting sliding block. A lower arm of a spring connecting block, a lower arm of a yarn clamping motor and a lower arm of a U-shaped yarn clamping plate are fixed onto the fixed rod respectively. A spring is connected between an upper arm of the spring connecting block and an upper arm of the U-shaped yarn clamping plate in an abutting mode. One end of the yarn clamping motor is provided with an elastic cam located between the upper arm of the U-shaped yarn clamping plate and the lower arm of the U-shaped yarn clamping plate. According to the bus real-time weft tension automatic adjusting device and method, tension of yarns can be detected in real time, meanwhile, the purposes of monitoring and adjusting the tension of the yarns are achieved through a control unit for controlling the motors to move and a tension adjusting closed loop.

Description

technical field [0001] The invention relates to a bus-type real-time weft tension automatic adjustment device and method thereof, in particular to a weft tension adjustment device composed of a multi-degree-of-freedom platform, a motor and a control unit, and a closed-loop adjustment method for real-time detection and feedback. Background technique [0002] During the textile weaving process, the mechanical properties of the fabric can be changed by adjusting the warp tension. However, during the formation of the flat fabric, the warp yarns and weft yarns interweave with each other and contact each other at the intersection point to form a positive pressure between them. Under the action of this pressure, the yarns generate deformation and stress to achieve the balance of the fabric. At the same time, the yarn will also be subject to inter-line friction due to positive pressure. These factors interact to make the fabric surface have different mechanical properties. [0003]...

AI Technical Summary

Problems solved by technology

Since the two ends of the weft thread are free to relax after the weft insertion action is completed in the weaving process, during the beating-up process accompanied by the closure of the cloth fell, stress is generated on the weft thread to balance the force of the warp thread, and the weft thread part in the middle position is due to the warp thread on both sides. There are many, so it is difficult to shrink, so its internal stress is relatively large, and the warp yarn clamped in the middle of the weft can not reach the straightened state due to the action of the weft, so a small bend is produced at the position in contact with the weft; and The weft threads on both sides have no force on the free ends, so the edges of the weft threads will be pulled into the fabric under the force of internal stress, resulting in more obvious bending. At the same time, the warp threads at these positions have no tension on the weft threads , in a straightened state under the tension of the two ends of the let-off shaft and the take-up shaft

Therefore, as the number of weaving weaves increases, the elongation of the warp yarns in the middle of the fabric will be much greater than the elongation at the edge positions. The warp yarn is broken, so that weaving cannot be completed smoothly

[0004] Therefore, in order to avoid the difference in fabric mechanical properties due to the uncontrollable weft tension in the weaving process, it is indeed necessary to provide an advanced bus-type real-time weft tension automatic adjustment device and its method to overcome the defects in the prior art

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