Tension modeling and analysis of braiding carriers during radial-direction and axial-direction braiding

Hu, Xintong; Zhang, Yujing; Meng, Zhuo; Sun, Yize

doi:10.1080/00405000.2018.1550871

Cited by 14 publications

(10 citation statements)

References 15 publications

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“…Improvement of the carriers for the reduction of fluctuations in carbon fiber tension is reported in Hu et al. 21 , 22 The mathematical modeling of the friction between yarns is reported by Zhang et al. 23 All these works demonstrate that 3D braiding with continuously rotating horn gears has reached maturity as a technology and equipment and increases its application areas.…”

Section: State Of the Artmentioning

confidence: 98%

Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Gleßner¹,

Kyosev

2021

Textile Research Journal

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The pattern changes on the 3D rotary braiding machines (maypole principle with horn gears with full and empty slots) require complex planning of the carrier positions and timing and allow for production of bifurcated and other complex braids with variable cross sections for medical and technical applications. Another common application of pattern changes is to make a visually different pattern for marking of the remaining length of rope when used in a climbing context or for generally lengthened pieces for medical sutures. The development of such samples has previously been done using the trial-and-error method. This paper presents one rule for supporting a more systematic and purposeful trial, which significantly speeds up the development process. After a short review of the related literature, the main theoretical background is given and two practical cases for pattern change are demonstrated. The patterns were developed using numerical simulation before being tested on a real braiding machine. With this paper the authors hope to give some motivation for the remaining braiders in the world to continue working on the development of systematic rules for this complex process.

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Section: State Of the Artmentioning

confidence: 98%

Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Gleßner¹,

Kyosev

2021

Textile Research Journal

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“…Substituting equation (17) to equation (15) to obtain the coordinates of point J 4 about θ, from which the equation of the line J 3 J 4 is derived, the axial clearance between the carrier base and the horn gear in the circular phase is ( θ ≥ arccosðR t =αRÞ…”

Section: Carrier Base Trajectory On the Coplanar Horn Gearmentioning

confidence: 99%

“…Du et al 16 optimized the horn gear radius under continuous braiding conditions using the carrier speed fluctuation rate and acceleration fluctuation rate as evaluation functions. Hu et al 17 analyzed that the carrier movement along the "∞" track is an important reason for yarn tension fluctuation and studied the influence of pulley wrap angle and bobbin rotation speed on braiding quality.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of axial clearance between the carrier base and horn gear in radial braiding machines

Meng

Sun

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Radial braiding machines are widely used in the preparation of complex preforms of high-performance fibers. However, the structural characteristics of a radial braiding machine inevitably cause axial clearance between the carrier base and horn gear, which affects the running speed of braiding machines and the stability of carrier exchanges. It is easy to create disadvantages of yarn fuzzing and poor continuity of preformed fibers. In order to solve these problems, this study compares and analyzes the coplanar horn gears in the industry and designs a kind of noncoplanar horn gear. Through the study, it is found that the trajectory of a carrier on a horn gear is divided into the linear phase and circular phase, based on which the mathematical model of the axial clearance between the carrier base and horn gear is established. The variation curve of the clearance with the horn gear rotation angle is plotted by using MATLAB software. A simulation model of the axial clearance between the carrier base and horn gear is established by using ABAQUS software, and carrier bases with different clearances are made to run on the braiding machine. The reliability of the theoretical calculation is verified by combining simulation and experiment, and it is proved that the use of the noncoplanar horn gear in radial braiding machines can effectively reduce the clearance and reduce vibration and shock.

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“…18 Meanwhile, a spring is provided to connect with braid yarn, so that braid yarn always has a certain tension. 19 According to the actual braiding, a finite element model mainly composed of braid yarn, braiding ring and annular axis mandrel is constructed. Since deformation of braiding ring and mandrel in the braiding process is negligible, discrete rigid elements are used to construct braiding ring and mandrel in finite element model, which also helps to ease the calculation.…”

Section: Simulation Of Braiding Processmentioning

confidence: 99%

“…18 Meanwhile, a spring is provided to connect with braid yarn, so that braid yarn always has a certain tension. 19…”

Section: Simulation Of Braiding Processmentioning

confidence: 99%

Modeling method of irregular cross section annular axis braided preform based on finite element simulation

Wang

Zhang

Shi

et al. 2021

Journal of Engineered Fibers and Fabrics

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The irregular cross section annular axis braided preform is modeled by using finite element simulation instead of geometric modeling. The braiding process is simulated by using a finite element software to obtain the yarn path. And the braided preform is modeled by using nine virtual fibers to form irregular cross section shape of yarn. Meanwhile, a modified vertical braiding machine is used to braid the actual preform, to compare with results from the simulation model. The results show that the simulation model is consistent with the actual braided preform, braiding angle is about 36°, and yarn spacing is about 6 mm. The finite element method can predict the yarn path more accurately without the need of complex analysis and derivation, especially when the irregular mandrel is used for braiding. In addition, the cross-section shape of yarn composed of virtual fibers can be used to achieve a more realistic simulation result. FEM is an efficient simulation method, and can also provide an effective basis in studies of the actual cross-sectional shape of yarn and the properties of its composite reinforcements.

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Tension modeling and analysis of braiding carriers during radial-direction and axial-direction braiding

Cited by 14 publications

References 15 publications

Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Carrier delay-based method for development of the tracks for the transitions between patterns on 3D braiding machines with continuous rotating horn gears

Modeling and analysis of axial clearance between the carrier base and horn gear in radial braiding machines

Modeling method of irregular cross section annular axis braided preform based on finite element simulation

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