CofiFab
CofiFab
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DOI：
10.1145/2897824.2925876
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发表时间：
2016-07
期刊：
影响因子：
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通讯作者：
Peng Song;Bailin Deng;Ziqi Wang;Zhichao Dong;Wei Li-;Chi-Wing Fu;Ligang Liu
中科院分区：
文献类型：
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作者：
Peng Song;Bailin Deng;Ziqi Wang;Zhichao Dong;Wei Li-;Chi-Wing Fu;Ligang Liu
本文提出了CofiFab，一种从粗到精的3D制造解决方案，将3D打印和2D激光切割相结合，以更低的成本和更高的速度高效地制造大型物体。我们的关键方法是首先使用激光切割在给定的3D对象内建立粗略的内部基础结构，然后将薄薄的3D打印部件作为外壳附加到基础上，以恢复精细的表面细节。CofiFab通过三个新的算法组件实现了这一点。首先，我们建立了一个优化模型来计算体积最大化的可制造多面体，作为内部底座的几何形状。其次，我们设计了一种新的联锁方案，通过迭代地建立非正交关节的网络和围绕多面体拐角的联锁部件，将激光切割的部件紧密地连接到强大的内部基础上。最后，我们优化了外部对象外壳到3D可打印部分的划分，同时节省了支撑材料，避免了悬垂。除了节约成本，这些组件还考虑了美观、稳定性和平衡性。因此，CofiFab可以通过组装高效地生产大型对象。为了评估CofiFab，我们制作了不同形状和大小的对象，并表明CofiFab可以显著优于以前的方法。
This paper presents CofiFab, a coarse-to-fine 3D fabrication solution, combining 3D printing and 2D laser cutting for cost-effective fabrication of large objects at lower cost and higher speed. Our key approach is to first build coarse internal base structures within the given 3D object using laser cutting, and then attach thin 3D-printed parts, as an external shell, onto the base to recover the fine surface details. CofiFab achieves this with three novel algorithmic components. First, we formulate an optimization model to compute fabricatable polyhedrons of maximized volume, as the geometry of the internal base. Second, we devise a new interlocking scheme to tightly connect the laser-cut parts into a strong internal base, by iteratively building a network of nonorthogonal joints and interlocking parts around polyhedral corners. Lastly, we optimize the partitioning of the external object shell into 3D-printable parts, while saving support material and avoiding overhangs. Besides cost saving, these components also consider aesthetics, stability and balancing. Hence, CofiFab can efficiently produce large objects by assembly. To evaluate CofiFab, we fabricate objects of varying shapes and sizes, and show that CofiFab can significantly outperform previous methods.