基于骨架提取的弯管类结构无支撑3D打印混合切片方法  

Skeleton-extraction-based hybrid slicing method for support-free 3D printing of elbow-like structures

作　　者：董方方 杜爽 廖飞 钱宸 殷远洋 李晓阳[1,3] DONG Fangfang;DU Shuang;LIAO Fei;QIAN Chen;YIN Yuanyang;LI Xiaoyang(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Provincial Engineering Laboratory of Intelligent CNC Technology and Equipment,Hefei 230009,China;Research Institute of Automation and Intelligent Equipment,Hefei University of Technology,Maanshan 243131,China)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009 [2]安徽省智能数控技术及装备工程实验室,安徽合肥230009 [3]合工大马鞍山博望自动化智能装备研究院,安徽马鞍山243131

出　　处：《计算机集成制造系统》2024年第9期3154-3162,共9页Computer Integrated Manufacturing Systems

基　　金：国家重点研发计划资助项目(2018YFB1308400);国家自然科学基金资助项目(51905140)。

摘　　要：弯管类结构存在丰富的悬空部位,采用传统熔融沉积3D打印技术制造需要消耗大量支撑,影响成本与成型表面质量。基于此,提出一种用于弯管类模型的骨架提取方法及相应的混合切片算法。与现有的简单沿骨架法面切片或分区多向切片技术不同,该方法充分利用弯管STL模型点云特点提取骨架和模型分层信息,引入干涉检查与切片路径检查,采用沿骨架法面切片与圆弧切片结合的混合切片方式,完成模型无支撑打印切片。最后,算法在4类模型上进行了切片仿真实验,验证其有效性和可行性。The elbow-like structure has abundant suspended parts.Using traditional fused deposition 3D printing methods to manufacture it requires a lot of support,which affects the cost and the molding surface’s quality.On this basis,a skeleton extraction method and a corresponding hybrid slicing algorithm were proposed.Being different from the existing methods of simply slicing along the normal plane of the skeleton or multi-directional slicing by partition,the point cloud characteristics of the elbow STL model was fully used to extract the skeleton and model layering information.By introducing interference checking and slice path checking,a hybrid slicing method combining slicing along the normal plane of the skeleton and arc slicing was adopted to complete the support-free printing slicing.Finally,simulation experiments were carried out on four types of models to verify the effectiveness and feasibility of the proposed algorithm.

关 键 词：弯管类结构 熔融沉积成型 无支撑3D打印 骨架提取 混合切片 

分 类 号：U173.1[交通运输工程] TP391.73[自动化与计算机技术—计算机应用技术]