Real-time toolpath planning and extrusion control (RTPEC) method for variable-width 3D concrete printing
Real-time toolpath planning and extrusion control (RTPEC) method for variable-width 3D concrete printing
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DOI：
10.1016/j.jobe.2021.103716
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发表时间：
2021-11
影响因子：
6.4
通讯作者：
Philip F. Yuan;Q. Zhan;Hao Wu;Hooi Shan Beh;Liming Zhang
中科院分区：
文献类型：
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作者：
Philip F. Yuan;Q. Zhan;Hao Wu;Hooi Shan Beh;Liming Zhang
基于挤压的 3D 混凝土打印 (3DCP) 是混凝土材料数字化制造中使用最广泛的方法之一。对于厚度可变的部件，使用恒定宽度细丝时可能会出现内腔或内部刀具路径。使用可变宽度细丝进行打印是减少内部刀具路径并增强组件完整性的一种可能的解决方案。然而，传统的开环控制方法需要对材料和挤出设备进行预校准，并且依赖于材料性能的精细控制和泵系统的稳定性。本文提出了一种使用实时刀具路径规划和挤压控制 (RTPEC) 的可变宽度 3DCP 方法。本文讨论了材料要求、挤出系统和实时控制算法。通过受控实验验证了算法和实时控制系统的可行性。通过3D扫描分析水平和垂直方向的打印精度。结果表明，使用 RTPEC 方法具有更好的水平精度和表面质量。结果完全在建筑规模组件的公差范围内，并展示了建筑规模组件在 3D 混凝土打印中的潜在应用。
Extrusion-based 3D concrete printing (3DCP) is one of the most widely used methods for the digital fabrication of concrete material. For variable thickness components, inner cavity or internal toolpath can occur when using constant-width filament. Printing with variable-width filament is a possible solution to reduce the inner toolpath and enhance the integrity of the components. However, the conventional open-loop control method requires pre-calibration of materials and extrusion equipment and relies on the fine control of the material properties and the stability of the pump system. This paper presents a variable-width 3DCP method using real-time toolpath planning and extrusion control (RTPEC). In this paper, the material requirement, extrusion system, and real-time control algorithm are discussed. A controlled experiment is performed to verify the feasibility of the algorithms and the real-time control system. The printing accuracy in the horizontal and vertical directions is analyzed by 3D scanning. The result shows better horizontal accuracy and surface quality by using the RTPEC method. The result is well within the tolerance of the building scale component and demonstrates the potential applications in 3D concrete printing of building scale components.