Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture
Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture
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DOI：
10.1016/j.addma.2016.10.004
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发表时间：
2017-01-01
影响因子：
11
通讯作者：
Clare, Adam T.
中科院分区：
文献类型：
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作者：
Hirsch, Matthias;Patel, Rikesh;Clare, Adam T.
与更成熟的减材或定体积制造技术不同，增材制造方法缺乏可以提供与工艺性能和缺陷形成相关的信息的原位监控方法。为了确保以这种方式生产的零件的完整性，增材制造的过程中评估变得越来越重要。本文讨论了适用于增材制造的检查方法的一般性能。探讨了关键工艺和测量参数，并定义了它们对生产率的影响。强调了基本的工作参数，其中测量的空间机会和时间损失允许比较不同无损评估技术的适用性。提出了一种对原位检测仪器进行基准测试并表征其对增材制造工艺的适用性的新方法，作为满足最终用户要求的设计工具。介绍了两个检查示例：分别用于扫描选择性激光熔化和选择性激光烧结零件的空间分辨声光谱和光学相干断层扫描。从所提出的分析中进行的观察表明，扫描参数产生的空间能力会影响时间损失，从而影响生产率。根据模拟数据创建的案例研究已用于概述通用无损评估方法的空间性能，并展示数据捕获分辨率的降低如何降低测量的准确性。 (C) 2016 年作者。由 Elsevier B.V. 出版
Unlike more established subtractive or constant volume manufacturing technologies, additive manufacturing methods suffer from a lack of in-situ monitoring methodologies which can provide information relating to process performance and the formation of defects. In-process evaluation for additive manufacturing is becoming increasingly important in order to assure the integrity of parts produced in this way. This paper addresses the generic performance of inspection methods suitable for additive manufacturing. Key process and measurement parameters are explored and the impacts these have upon production rates are defined. Essential working parameters are highlighted, within which the spatial opportunity and temporal penalty for measurement allow for comparison of the suitability of different nondestructive evaluation techniques. A new method of benchmarking in-situ inspection instruments and characterising their suitability for additive manufacturing processes is presented to act as a design tool to accommodate end user requirements. Two inspection examples are presented: spatially resolved acoustic spectroscopy and optical coherence tomography for scanning selective laser melting and selective laser sintering parts, respectively. Observations made from the analyses presented show that the spatial capability arising from scanning parameters affects the temporal penalty and hence impact upon production rates. A case study, created from simulated data, has been used to outline the spatial performance of a generic nondestructive evaluation method and to show how a decrease in data capture resolution reduces the accuracy of measurement. (C) 2016 The Authors. Published by Elsevier B.V.