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FFF通过现场电阻监测进行印刷缺陷的表征

Heime Jonkers¹, Alexander Dijkshoorn², Stefano Stramigioli²

¹EEMCS, Robotics and Mechatronics, University of Twente, 7522NB, Enschede, The Netherlands. h.r.jonkers@utwente.nl.

Scientific reports

|May 24, 2024

概括

本研究引入了电阻测量,用于实时监测化丝制造 (FFF). 这种非破坏性方法有效地检测打印缺陷,提高质量控制,并使闭环制造成为可能.

科学领域:

材料科学材料科学材料科学
制造业工程制造工程
添加剂制造添加剂制造添加剂制造

背景情况:

化丝制造 (FFF) 缺乏负担得起的,实时的现场监控来检测缺陷.
目前的热和光学方法在检测空隙和非破坏性评估粘合质量方面存在局限性.

研究的目的:

用电阻测量作为一种新的,负担得起的替代方案来证明FFF的现场监测.
在FFF期间开发一个易于实施的实时缺陷检测和质量评估设置.

主要方法:

使用导电杂的光纤并测量其喷嘴和床电极之间的电阻.
采用编码轴与阻力变化相结合,以精确地定位印刷部件中的缺陷.
开发并应用一种异构电导模型来解释电阻测量数据.

主要成果:

成功检测到各种打印缺陷,包括曲,层间粘合力差,挤出不足,以及复杂几何形状的悬挂下垂.
证明电阻变化与特定的打印缺陷相关,允许其识别.
不同类型的导电模型与实验电阻数据有很好的一致性.

结论:

现场电阻监测为FFF质量评估和流程优化提供了有效的,非破坏性的工具.
该技术为在线分析打印参数影响提供了新的途径,并为增材制造中的闭环控制打开了可能性.

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Resistivity

Resistivity

When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as: