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

DMI-9800187 Newman CAM-LEM(叠层工程材料的计算机辅助制造)是一种新的制造工艺，构成了快速成型领域的新一代进步。CAM-LEM加工步骤包括：根据切片平面的轮廓和曲面切线分析CAD模型；根据计算的边切线进给和激光切割薄板流延材料；自动提取所需的切片区域并将其堆叠起来，以组装3D零件，并交织用于临时支撑的互补形状的逃逸材料；以及后处理，以实现层压、粘结剂烧毁、逃逸烧毁和烧结到完全密度。这项调查的目的是确定CAM-LEM是否能够实现成为可行的制造工艺所必需的性能。调查将确定和分析CAM-LEM技术在极限制造速度、零件精度、可实现的最大和最小尺寸和高宽比以及材料延伸性方面的基本限制。设计研究和仿真将导致构建一台快速、准确和可靠的机床，实现自动化的CAM-LEM。如果成功，这项研究将为创造一种新的、更快、更灵活的制造机器和基于电子描述的直接制造功能部件的工艺提供使能技术。

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.