Progressive design of the take-up bar within the jet weaving machine for the production of 3D fabrics

• Autorzy: Koňařík Tomáš , Ráž Karel

Identyfikatory

DOI

10.17512/jamcm.2024.3.03

• Języki publikacji: EN

Abstrakty

EN

On the DIFA II loom, which is a special air jet weaving machine for the production of drop-stitch fabrics with a variable distance, so called 3D or distance fabrics, the main component of the interconnecting yarn creation mechanism is a take-up bar. During the yarn loops formation, the take-up bar is exposed to high loads, while being pulled by a mechanism into a limited wedge-shaped space between the two plain weave faces, thus the bending stiffness of the bar is crucial. Deflection of the bar combined with an elongation of the warp yarns results in an uneven load distribution with an undesirably loosened central section of warp yarns. This phenomenon is deeply examined in this paper. The classical model of a thin beam loaded by a distributed linear force cannot be applied in this case. In this work are new take-up bar designs considering usage and production aspects. The take-up bar variants with different warp yarns stiffness were analysed. A numerical model was created, and calculations were performed by the FEM solver NX Nastran as a 1D solution. Additionally, the problem was analysed analytically and it shows an analogy with a beam on an elastic foundation. The theoretical Winkler’s model was used and an idealised analytical solution was found. In both methods, comparable maximal deflections of the take-up bar and widths of loosened yarns were found. The obtained results of the bar deflection were validated with a good agreement on the DIFA II loom using new take-up bars.

Słowa kluczowe

EN

weaving machine; drop-stitch; FEM simulation; Winkler model

PL

maszyna tkacka; ścieg opuszczony; symulacja FEM; model Winklera

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Journal of Applied Mathematics and Computational Mechanics
• Rocznik: 2024
• Tom: Vol. 23, nr 3
• Strony: 31--42
• Opis fizyczny: Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Koňařík Tomáš

• Department of Weaving Technology, VÚTS, a.s. Liberec, Czech Republic

autor

Ráž Karel

• Faculty of Mechanical Engineering, University of West Bohemia Plzeň, Czech Republic

Bibliografia

• 1. Zhao, Y., et al. (2023). Compressive properties investigation of “stress transformer” based on high-distance woven spacer fabric design. Journal of Industrial Textiles, 53. DOI: 10.1177/ 15280837231164785.
• 2. Teng, Y.-S., et al. (2011). Weaving Machines and Three-Dimensional Woven Fabrics, US Pat. 2011/0132488 A1 and US 8 015 999 B2, 09/13/2011.
• 3. Halbach, K. (1980). Design of permanent multipole magnets with oriented rare earth cobalt material. Nuclear Instruments and Methods, 169(1), 1-10. DOI: 10.1016/0029-554X(80)90094-4.
• 4. Aydin, E., et al. (2020). Optimization of elastic springs supports for cantilever beams. Structural and Multidisciplinary Optimization, 62. DOI: 10.1007/s00158-019-02469-3.
• 5. Žák, J. (2016). Dimensioning of the take-up bar on a weaving loom using Winkler’s model of soil. Computational Mechanics 2016, 151. Plzeň, University of West Bohemia, ISBN: 978-80-261-0647-0.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).