现代制造工程Issue(8)：19-26,8.DOI:10.16731/j.cnki.1671-3133.2024.08.003
基于数字化模型的自由曲面打印研究
Research on freeform surface printing based on digital models
摘要
Abstract
To achieve precise functional printing on the freeform surface of the hand,a method combining 3D point cloud digital molding process and freeform surface functionalization molding process is proposed.Firstly,the point cloud data of the hand is collected through a 3D scanner,and the surface feature points are smoothed and denoised using adaptive weighted guided filtering technology.Next,a curvature-based adaptive surface geometric sampling algorithm is employed to simplify the point cloud without losing detail features.Subsequently,the optimized point cloud data is used to accurately reconstruct the digital model of the hand,extract its freeform surface coordinates,and design functional circuit patterns on it.Finally,the hand structure is printed using a Fused Deposition Modeling(FDM)system with the NC code generated by computer-aided design and vector graphic editing soft-ware,followed by printing electronic skin on the freeform surface of the hand using aerosol jet printing technology.Experimental results show that the point cloud data strategy adopted in this experiment reduces the number of hand scanning points by 80％,achieving significant simplification.The error range of the hand reverse reconstruction model is within 0.4 mm,showing a high de-gree of fitting to the physical prototype.The empirical demonstration showcases the potential of electronic skin in the integrated molding of the freeform surface of the hand and provides a technical reference for high-precision functional printing.关键词
手部自由曲面/数字化模型/计算机辅助设计/电子皮肤Key words
hand freeform surface/digital model/computer-aided design/electronic skin分类
机械制造引用本文复制引用
丁医华,吴国良,张天玮,张婕..基于数字化模型的自由曲面打印研究[J].现代制造工程,2024,(8):19-26,8.基金项目
江苏省产业前瞻竞争性项目(BE2017069) （BE2017069）
