Yarn Winding Device Feedback Tension Control
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Solution Overview
Problem
Conventional yarn winding devices lack effective tension control, leading to fluctuations in yarn tension, which can result in yarn breakage or loosening, particularly at high speeds, affecting production efficiency and package quality.
Innovation Solution
A yarn winding device equipped with a tension measuring device and a control section that adjusts the torque of a tension applying section based on real-time tension measurements, ensuring consistent tension application through feedback control, and incorporating a transmission mechanism with a clutch and torque limiter to prevent excessive tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the arm is rotated at constant torque without tension feedback control, then the device complexity is reduced, but the yarn tension becomes difficult to hold at optimum value causing yarn breakage or loosening
Solution Approach 1:
The patent implements feedback control by using a tension detector to measure yarn tension and feed this information back to the control unit, which then adjusts the arm's torque accordingly. This closed-loop system maintains optimal yarn tension during high-speed winding operations, preventing both yarn breakage and loosening while ensuring consistent package quality.
2Productivity
If the yarn winding speed is increased to improve productivity, then the production efficiency is improved, but the fluctuation in yarn tension becomes large causing yarn breakage
Solution Approach 1:
The feedback control system continuously monitors yarn tension and adjusts the arm's torque in real-time to compensate for tension fluctuations caused by high-speed winding and traversing operations. This enables the system to maintain stable yarn tension even at increased winding speeds, thereby improving productivity without sacrificing reliability.
Solution Approach 2:
The patent employs dynamic torque adjustment of the arm based on real-time tension measurements. Rather than using constant torque, the system dynamically modifies the arm's driving torque to match the varying tension requirements during high-speed operation, ensuring consistent yarn handling throughout the winding process.
3Ease of operation
If the tension applying section is controlled independently without feedback, then the ease of operation is improved, but the package quality is lowered due to tension fluctuations
Solution Approach 1:
The control unit independently adjusts the arm's torque based on feedback from the tension detector, maintaining ease of operation through independent control capability while ensuring consistent package quality. The feedback mechanism automatically compensates for tension variations without requiring manual intervention, preserving both operational simplicity and manufacturing precision.
Data Source
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AI summary
A yarn winding device includes a yarn storage roller (51), a tension measuring device, a yarn hooking arm (53), an arm driving section (55), and a control section (60). The yarn storage roller (51) stores a yarn on a surface by being rotatably driven by a roller driving section (52). The tension measuring device measures tension of the yarn pulled out from the yarn storage roller (51). The yarn hooking arm (53) is arranged downstream in a yarn travelling direction of the yarn storage roller (51), and makes contact with the yarn to apply tension to the yarn. The arm driving section (55) rotatably drives the yarn hooking arm (53). The control section (60) feedback controls the arm driving section (55) based on a measurement result of the tension measuring device to adjust an amount of tension applied by the yarn hooking arm (53).