Analysis of yarn tension based on yarn demand variation on a tricot knitting machine

Lü, Xing; Miao, Xin

doi:10.1177/0040517516632473

Cited by 15 publications

(14 citation statements)

References 3 publications

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“…The quadratic programming model shown in equations (25) and (20) is solved by Lingo software. The optimal solution is s = 824:35, where D l = 8:9 and D t = 0:3.…”

Section: Sensitivity Optimization Induced By Idt Position Parametersmentioning

confidence: 99%

“…Due to the restrictions of substrate size and manufacturing technology, we choose equation (20) as the constraint condition.…”

Section: Sensitivity Optimization Induced By Idt Position Parametersmentioning

confidence: 99%

“…The yarn tension sensor sensitivity is of great significance to yarn production and quality. 20 As a result, the influence of the IDT position parameters on SAW yarn tension sensor sensitivity was investigated. After researching the substrate stress-strain characteristic, the regression function between sensor sensitivity and the IDT position parameters was established.…”

Section: Introductionmentioning

confidence: 99%

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Effect of IDT position parameters on SAW yarn tension sensor sensitivity

Lei

Mian

et al. 2020

Measurement and Control

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In this paper, the effect of the interdigital transducer (IDT) position parameters on the surface acoustic wave (SAW) yarn tension sensor sensitivity is investigated. The stress–strain characteristic of substrate was studied by the combination of finite element simulation and regression analysis method. According to this characteristic, the function relationship between the SAW yarn tension sensor sensitivity and the IDT position parameters was built using the regression analysis method. The monotonicity of the regression function was also given. On this basis, a novel sensitivity optimal scheme was proposed and solved by the quadratic programming method. Its solution demonstrates that the optimum sensitivity can be obtained when the IDT is 8.9 mm to the left side of the substrate and the IDT is 0.3 mm to the top edge of the substrate within a domain of the IDT position parameters. The SAW yarn tension sensor with corresponding IDT position parameters was fabricated to validate the correctness of the sensitivity optimal scheme. The measured results indicate that the SAW yarn tension sensor sensitivity can reach 813.69 Hz/g, which confirms that the novel scheme is effective.

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“…The quadratic programming model shown in equations (25) and (20) is solved by Lingo software. The optimal solution is s = 824:35, where D l = 8:9 and D t = 0:3.…”

Section: Sensitivity Optimization Induced By Idt Position Parametersmentioning

confidence: 99%

“…Due to the restrictions of substrate size and manufacturing technology, we choose equation (20) as the constraint condition.…”

Section: Sensitivity Optimization Induced By Idt Position Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of IDT position parameters on SAW yarn tension sensor sensitivity

Lei

Mian

et al. 2020

Measurement and Control

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“…The trail of the guide needle establishes the models for the lapping angle of closed and open loops [11].…”

Section: Calculation Of Lapping Anglementioning

confidence: 99%

Calculation and Analysis of Horizontal and Vertical Lapping Angles in Tricot Warp Knitting

Zhang

Miao

Wan

2019

Autex Research Journal

Self Cite

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The lapping angle, which affects the style and quality of production, has been studied as a parameter of weft knitting. But the importance of the lapping angle has not been considered during the warp-knitting cycle. This paper shows that the lapping angle exists in the process of warp knitting and can be divided into horizontal and vertical lapping angles. Models for the lapping angles of closed and open loops were devised, and the lapping angles (horizontal and vertical lapping angles) of closed and open loops were calculated and analyzed. Furthermore, the paper seeks to investigate the factors that influence the lapping angle of tricot warp-knitted fabrics and summarize the rules. Moreover, the vertical lapping angle can affect the loop coverage. Results reveal that the decrease in number of underlaps and an increase in take-off density enables loops of the front guide bar to show on the face of the fabric. Moreover, it is also advantageous for an apparent front loop visibility when the front guide bar knits in open loop.

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“…In particular, it makes fabric defects such as lack-paste in the ground of the plating fabric when highly elastic yarns or inelastic yarns are used, affecting the quality of the fabric. 10,11 Research on the tension of the yarn in the knitting process focuses on warp knitting and circular weft knitting, and there is less research on flat knitting due to the special yarn feeding method. Pohlen et al 12 investigated how to reduce yarn tension differences in technical warp knits based on a warp yarn tension analysis on a warp knitting machine with multiaxial weft yarn insertion.…”

mentioning

confidence: 99%

Construction and system realization of the yarn tension model of fully fashioned flat knitting fabric

Zhao

Cong

2020

Textile Research Journal

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In recent years, fully fashioned flat knitting fabrics have been extensively studied owing to their superior formability, rich application range and advanced knitting technology. However, the yarn tension fluctuations during the knitting process are difficult to control. The yarn tension in the knitting process is affected by many factors, such as the carriage running speed, structure, yarn properties, clothing parameters, and so on. In this work, a tension model of the yarn was established to explore the regularity of yarn tension variation, which was caused by the running speed and direction of the carriage when producing fully fashioned fabrics. Then, a tension compensation device was set up to reduce tension fluctuations to improve the quality of fully fashioned fabrics. Results showed that the tension fluctuation in the dynamic change of the tension was reduced to a certain extent by adding the tension compensation device. Meanwhile, the average value and fluctuating standard deviation of the yarn tension between the forward and backward processes were significantly reduced during a cycle of the knitting process. This indicates that controlling the tension fluctuation in the knitting process will effectively improve the surface evenness of the fully fashioned flat knitting fabric.

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Analysis of yarn tension based on yarn demand variation on a tricot knitting machine

Cited by 15 publications

References 3 publications

Effect of IDT position parameters on SAW yarn tension sensor sensitivity

Effect of IDT position parameters on SAW yarn tension sensor sensitivity

Calculation and Analysis of Horizontal and Vertical Lapping Angles in Tricot Warp Knitting

Construction and system realization of the yarn tension model of fully fashioned flat knitting fabric

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