面向陶瓷3D打印的双尺度放样曲面建模  

Two-Scale Lofted Surfaces Modeling for Ceramic 3D Printing

作　　者：周宇[1] 刘文强 钟凡超 闫鑫[1] 吕琳[1] Zhou Yu;Liu Wenqiang;Zhong Fanchao;Yan Xin;Lyu Lin(School of Computer Science and Technology,Shandong University,Qingdao 266237;School of Mechanical Engineering,Shandong University,Jinan 250061)

机构地区：[1]山东大学计算机学院,青岛266237 [2]山东大学机械工程学院,济南250061

出　　处：《计算机辅助设计与图形学学报》2021年第7期1132-1140,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(61972232);虚拟现实技术与系统国家重点实验室开放课题(VALAB2019A01)。

摘　　要：针对陶瓷3D打印的特点,提出基于放样曲面与周期参数曲线嵌入的双尺度轻量化交互式建模和制造工具.对于用户输入的2条封闭曲线,首先在它们之间插值生成中间截面采样点,并在免支撑、路径无干涉等陶瓷3D打印制造约束下对当前曲面形状进行调整,完成基于放样曲面的大尺度曲面建模;然后将采样点之间的直线路径用周期性曲线路径代替,通过调整曲线函数的周期和振幅完成小尺度几何纹理建模;最后按螺旋方式逐层连接各个截面采样点,直接生成单一连续的打印路径并制造.为验证文中方法的有效性,基于绘制的3组曲线进行建模并利用CERAMBOT Plus陶瓷3D打印机制造模型.实验结果表明,该工具为用户提供了充足的建模空间且模型生成效率高,能够有效地生成可直接进行陶瓷3D打印的带纹理放样曲面的G-code文件.Considering the characteristics of extrusion-based ceramic 3 D printing,a lightweight interactive two-scale modeling and manufacturing tool based on lofted surfaces is proposed.Given two closed curves input by the user,it first performs interpolation between the two curves,generates the intermediate points,and automatically modulates the shape to satisfy the constraints of ceramic 3 D printing,including self-supporting and collision-free during fabrication.Then the line between intermediate points is replaced with the predefined periodic curve and the curve’s period and amplitude are adjusted to synthesize geometric textures.Finally,intermediate points are connected on each section layer by layer to obtain a single continuous spiral printing path.The proposed modeling method is evaluated on three groups of curves and solid objects fabricated by the CERAMBOT Plus 3 D printer.Experimental results show that the proposed modeling tool provides users with sufficient modeling space,which can effectively model lofted surfaces with geometric textures and generate the printing G-code files for ceramic 3 D printing reliably.

关 键 词：陶瓷3D打印 放样曲面 几何纹理 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]