Computer-Aided Manufacturing of Laminated Engineering Materials: Machine Design and Process Control

纽曼CAM-LEM（计算机辅助制造层压工程材料）是一种新的制造工艺，构成了下一代快速成型领域的进步。CAM-LEM的处理步骤是：根据切片平面的轮廓和表面切线分析CAD模型；根据计算的边缘切线进料和激光切割片材；机器人提取所需的切片区域并将其堆叠以组装3d部件，并与互补形状的逃逸材料相互交错以作为临时支撑；后处理实现层压、粘结剂烧尽、逸散烧尽、烧结至全密度。本研究的目的是确定CAM-LEM是否能达到必要的性能，成为一个可行的制造工艺。调查将确定和分析CAM-LEM技术在最终构建速度、零件精度、可实现的最大和最小尺寸和长宽比以及材料可扩展性方面的基本限制。设计研究和仿真将导致快速、准确和可靠的机器的建设，实现自动化凸轮- lem。如果成功，这项研究将产生一种新的、更快、更灵活的制造机器和工艺，用于基于电子描述的功能部件的直接制造。

DMI-9800187 Newman CAM-LEM (Computer-Aided Manufacturing of Laminated Engineering Materials) is a new manufacturing process constituting a next-generation advance in the field of Rapid Prototyping. The CAM-LEM process steps are: analyze a CAD model in terms of contours of slice planes and in terms of surface tangents; feed and laser-cut sheet tape-cast materials per the computed edge tangents; robotically extract the desired slice regions and stack them to assemble 3-D parts, interleaved with complementary shapes of fugitive material for temporary supports; and post-process to achieve lamination, binder burn-out, fugitive burn-out and sintering to full density. The objective of this investigation is to determine whether CAM-LEM can achieve the performance necessary to become a viable manufacturing process. The investigation will identify and analyze the fundamental limits to CAM-LEM technology in terms of ultimate build speed, parts accuracy, maximum and minimum dimensions and aspect ratios achievable, and materials extensibility. Design studies and simulations will lead to the construction of a fast, accurate and reliable machine for the realization of automated CAM-LEM. If successful, this research will yield the enabling technology for the creation of a new, faster and more flexible manufacturing machine and process for direct fabrication of functional parts based on electronic descriptions.