A layerless additive manufacturing process based on CNC accumulation
A layerless additive manufacturing process based on CNC accumulation
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DOI：
10.1108/13552541111124806
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发表时间：
2011-01-01
影响因子：
3.9
通讯作者：
Lao, Jingyuan
中科院分区：
文献类型：
--
作者：
Chen, Yong;Zhou, Chi;Lao, Jingyuan
目的-目前大多数增材制造（AM）工艺都是基于层的。通过将三维模型转换为二维层，可以大大简化工艺规划。然而，也存在与这种方法相关联的缺点，例如不一致的材料特性和难以嵌入现有部件。本文的目的是提出一种新的AM过程，是非层为基础，并证明其独特的capability.Design/方法/途径-一个AM过程命名为计算机数控（CNC）积累已经开发。在这种无层AM工艺中，与紫外（UV）LED和相关透镜连接的光纤电缆用作累积工具。然后将电缆合并到充满紫外线固化液体树脂的罐内。通过控制的开/关状态的UV-LED和电缆的多轴运动，物理模型可以通过选择性地固化液体树脂到solid.Findings -它被发现，固化的树脂可以安全地从累积工具分离，通过施加聚四氟乙烯涂层的光纤电缆的尖端，并控制电缆和基地之间的适当间隙。实验结果验证了固化和附着力models.Research限制/影响-一个概念验证试验台已开发的基础上固化工具，具有直径约2毫米。相对较大的工具尺寸限制了几何分辨率和部分质量的建成parts.Originality/值-通过将多轴工具运动，CNC累积过程可有益于诸如塑料部件修复、添加新设计特征和围绕插入件构建的应用。
Purpose - Most current additive manufacturing (AM) processes are layer based. By converting a three-dimensional model into two-dimensional layers, the process planning can be dramatically simplified. However, there are also drawbacks associated with such an approach such as inconsistent material properties and difficulty in embedding existing components. The purpose of this paper is to present a novel AM process that is non-layer based and demonstrate its unique capability.Design/methodology/approach - An AM process named computer numerically controlled (CNC) accumulation has been developed. In such a layerless AM process, a fiber optic-cable connected with an ultraviolet (UV) LED and related lens is served as an accumulation tool. The cable is then merged inside a tank that is filled with UV-curable liquid resin. By controlling the on/off state of the UV-LED and the multi-axis motion of the cable, a physical model can be built by selectively curing liquid resin into solid.Findings - It is found that the cured resin can be safely detached from the accumulation tool by applying a Teflon coating on the tip of the fiber-optic cable, and controlling an appropriate gap between the cable and the base. The experimental results verified the curing and attaching force models.Research limitations/implications - A proof-of-concept testbed has been developed based on a curing tool that has a diameter around 2 mm. The relatively large tool size limits the geometry resolution and part quality of the built parts.Originality/value - By incorporating multi-axis tool motion, the CNC accumulation process can be beneficial for applications such as plastic part repairing, addition of new design features, and building around inserts.