基于环形邻域的增材制造分层自适应正向设计方法  

Adaptive forward design for slicing of additive manufacturing based on ring neighborhood

作　　者：徐敬华[1] 盛红升 高铭宇 张树有[1] 刘晓健[1] 谭建荣[1] XU Jinghua;SHENG Hongsheng;GAO Mingyu;ZHANG Shuyou;LIU Xiaojian;TAN Jianrong(Engineering Research Center for Design Engineering and Digital Twin of Zhejiang Province,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学设计工程及数字孪生浙江省工程研究中心,浙江杭州310027

出　　处：《计算机集成制造系统》2023年第7期2363-2375,共13页Computer Integrated Manufacturing Systems

基　　金：国家自然科学基金重点资助项目(51935009);国家重点研发计划资助项目(2022YFB3303303);浙江大学IDEA创新设计资助项目(188170-11102)。

摘　　要：为了提升多特征成形的表面精度与制造效率,提出一种基于环形邻域的增材制造分层自适应正向设计方法。构建模型多阶环形邻域,基于变尺度的平均曲率高斯加权平均值计算模型显著度,运用动态聚类确定显著特征。以递归获取的形态显著线的变化确定初始分层厚度,建立自洽的分层规划正向设计数学模型。进一步运用数字孪生技术实现增材制造虚拟打印。以虚拟打印模型在打印坐标系正平面和侧平面的分层投影面积为材料热塑约束,并通过双向循环链表和八叉树计算投影面域集合的布尔并,实现多特征迭代的分层规划正向设计。采用接触式轮廓仪对打印模型不同特征区域进行了表面粗糙度测量。实例表明,该方法能够有效地对多特征流形模型进行自适应分层,有助于提升3D打印与4D打印层积制造品质与效率。To improve the surface accuracy and manufacturing efficiency of multi-feature forming,an adaptive forward design approach for slicing of Additive Manufacturing(AM)based on Ring Neighborhood(RN)was proposed.The multi-order RN of the model was constructed.The model saliency was calculated based on Gaussian weighted average of the mean curvature with variable scale,and the salient features were determined by dynamic clustering.The initial layer thicknesses were determined based on the change of morphological saliency lines obtained recursively,and a self-consistent Slicing Programming Forward Design(SPFD)mathematical model was established.Further,the virtual printing of AM was realized with digital twin technology.The layered projection areas of the virtual printing model on the positive and lateral planes in the printing coordinate system were used as material thermo-plastic constraints,and the double-linked circular list and octree were applied to calculate the Boolean union of the projection area set to realize the SPFD of multi-feature iteration.The surface roughness of different feature regions of the printed model was measured by a contact profilometer.The results showed that the approach could effectively slice multi-feature manifold models adaptively,which was helpful to improve the layered manufacturing efficiency and quality of 3D Printing and 4D Printing.

关 键 词：环形邻域 显著特征 自适应分层 增材制造 数字孪生 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]