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A model for the micro-fabrication with selective laser sintering metal powders

机译：选择性激光烧结金属粉末的微细加工模型

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摘要

There are many micro-fabrication technologies. Some micro-components can be fabricated by selective laser sintering (SLS). When selective laser sintering metal powders is used to produce micro-components, there are numbers of factors which will influence final result, such as laser wavelength, laser power, diameter of laser beam, scanning speed, particle size and materials etc. These factors are not single but interfere with each other. The change of one factor will greatly affect the character of final micro-components (such as width of scanning track , dimension error, component hardness ,etc). In selective laser sintering metal powders, many experiments are needed in order to get the optimum process parameters. However, this will cost much time and money. Moreover in later process, new experiments will be needed in order to get the optimum process parameters due to the change of one factor. Many models about selective laser sintering metal powders have been investigated in the past. Nevertheless, these models are about the interaction of laser and metal powders, and the physical and thermal response to the initial condition. They are provided for the macro-fabrication. No model can be applied in the micro-domain, and no one aims at the influence of these factors on the character of the final micro-component. In this paper a numerical model about the relation of these factors and the character of final micro-components is provided to minimize the number of experiments. This model will include the major factors of SLS in micro-domain, and through such a model we can deduce the numerical value of optimum process parameters from final micro-component character instead of making a lot of process experiments. Therefore the cost of micro-fabrication with SLS techniques will be greatly reduced.
机译：有许多微细加工技术。一些微组件可以通过选择性激光烧结（SLS）来制造。当使用选择性激光烧结金属粉末生产微型部件时，会影响最终结果的因素很多，例如激光波长，激光功率，激光束直径，扫描速度，粒度和材料等。这些因素是不是单身，而是互相干扰。一个因素的变化将极大地影响最终微部件的特性（例如扫描轨迹的宽度，尺寸误差，部件硬度等）。在选择性激光烧结金属粉末中，需要许多实验才能获得最佳工艺参数。但是，这将花费很多时间和金钱。此外，在随后的过程中，由于一个因素的变化，将需要进行新的实验以获得最佳的过程参数。过去已经研究了关于选择性激光烧结金属粉末的许多模型。但是，这些模型是关于激光和金属粉末的相互作用以及对初始条件的物理和热响应的。它们是为宏观制造而提供的。无法在微域中应用任何模型，也没有人针对这些因素对最终微组件特性的影响。在本文中，提供了一个关于这些因素与最终微组分特征之间关系的数值模型，以最大程度地减少实验次数。该模型将包括微域中SLS的主要因素，通过这种模型，我们可以从最终的微组分特征中推断出最佳工艺参数的数值，而无需进行大量的工艺实验。因此，使用SLS技术进行微制造的成本将大大降低。

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