Mold Geometry Analysis Tools for Fabric Material Handling System Applications

Alebooyeh, Morteza; Urbanic, Jill

doi:10.14733/cadconfp.2022.404-409

“…The fabric properties that determine its propensity to drape (including the in-plane shear and bending stiffness, structural stability etc.) influence the placement results, which also depend on the geometric features of the mold [1][2]. A typical parameter is the bending length, which can be calculated using Peirce's cantilever method [9].…”

Section: Fabric Pick and Placementioning

confidence: 99%

Auxetic Honeycomb Lattice Structure in Thin Solids for Enhanced Energy Absorption: Innovative Two-Wheeler Helmet Design and Analysis

Das,

Kumar

2024

CAD&A

0

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The challenges posed by flexible limp fabric material handling within automated manufacturing processes are addressed in this paper. With lightweight materials, particularly fiber composites, gaining prominence across industries, the need for effective and precise fabric placements is deemed crucial. Traditional gripping methods are often found to be lacking in addressing the complexities of fabric draping, necessitating innovative solutions. The deformable, delicate, and complex nature of fabric materials, combined with intricate mold surface geometries, presents significant hurdles for achieving wrinkle-free, accurate placements. To overcome these challenges, a compliant gripper approach is proposed. Associating surface geometry analysis with gripper design, the study aims to enhance the efficiency, precision, and adaptability of fabric placement in automated manufacturing settings. The study exploits the deformable robotic gripper concepts. Compliant mechanisms include variants inspired by the Miura-fold origami approach. The facet-based representation and data processing technique used for a mold's surface allows for associations between the design parameters of the compliant grippers and the mold surface geometry. Design guidelines encompass considerations related to geometry, structural integration, surface friction enhancement, and material selection to provide a baseline framework for the interactive design of compliant grippers. Case studies highlight the merits of the approach for different surface geometries and show the potential for compliant mechanisms being employed in flexible component automation.

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“…Sharp edges and corners should be avoided in mold design as they can become problematic during draping in terms of conforming the fabric to the mold surface feature. These features often force the use of darting, allowing the surface to be covered without wrinkling but increasing production time since cuts must be made through the patterns [1,16]. Preliminary shear is a proposed solution for mitigating wrinkling and eliminating the need for darting.…”

Section: Angle Between Surfacesmentioning

confidence: 99%

“…Warp and weft yarns along an orthogonal crossededge attempt to become parallel to one another. Wrinkling is often a result of the angle between the warp and weft either becoming too large or too small due to in-plane shear [1].…”

Section: Corners and Edgesmentioning

confidence: 99%

“…Qualitative and semi-quantitative mold surface geometry analysis tools such as Surface Curvature Combs, Deviation analysis, color-coding Curvature Analysis, Zebra stripes tool, and Environment Map (E-Map) were previously discussed in [1] for a few typical mold surfaces using SolidWorks and Rhinoceros [7,18] by the current research group. Modification and optimization tools of surface features such as Vertical Deviation (min, max, average), Surface Smoothening, and Surface Flattening were also proved useful for removing unwanted details of the surface and wrinkle-free conformity of draping operation.…”

Section: 1mentioning

confidence: 99%

See 1 more Smart Citation

Liaison-Based Enriched CAD Model Representation for Assembly Tasks

Bonino,

Giannini,

Monti

et al. 2024

CAD&A

0

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The challenges posed by flexible limp fabric material handling within automated manufacturing processes are addressed in this paper. With lightweight materials, particularly fiber composites, gaining prominence across industries, the need for effective and precise fabric placements is deemed crucial. Traditional gripping methods are often found to be lacking in addressing the complexities of fabric draping, necessitating innovative solutions. The deformable, delicate, and complex nature of fabric materials, combined with intricate mold surface geometries, presents significant hurdles for achieving wrinkle-free, accurate placements. To overcome these challenges, a compliant gripper approach is proposed. Associating surface geometry analysis with gripper design, the study aims to enhance the efficiency, precision, and adaptability of fabric placement in automated manufacturing settings. The study exploits the deformable robotic gripper concepts. Compliant mechanisms include variants inspired by the Miura-fold origami approach. The facet-based representation and data processing technique used for a mold's surface allows for associations between the design parameters of the compliant grippers and the mold surface geometry. Design guidelines encompass considerations related to geometry, structural integration, surface friction enhancement, and material selection to provide a baseline framework for the interactive design of compliant grippers. Case studies highlight the merits of the approach for different surface geometries and show the potential for compliant mechanisms being employed in flexible component automation.

show abstract