Detection of Core Fracture in Inorganically Bound Cast-in Sand Cores by Acoustic Microphony
Detection of Core Fracture in Inorganically Bound Cast-in Sand Cores by Acoustic Microphony
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DOI：
10.1007/978-3-030-03451-1_4
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
Florian Ettemeyer;F. Steinlehner;Philipp Lechner;W. Volk;D. Günther
中科院分区：
文献类型：
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作者：
Florian Ettemeyer;F. Steinlehner;Philipp Lechner;W. Volk;D. Günther
本文提出了一种新的检测镶铸砂芯断裂的方法。这种方法的目标是减少时间和精力，以及增加脱芯过程的稳定性。为了测试这种方法，建立了一个测试几何形状和一个测试装置来探索实验室中的去芯过程。所提出的方法是基于声学颤噪来确定铸件和应通过机械脱芯工艺去除的铸件内砂芯之间的任何断裂和接触损失。通过使用数值工具的理论decoring状态发生的本征模的预测是可能的。该方法特别适用于无法通过目视检查进行监测的铸件几何形状，例如内燃机气缸盖中的冷却通道。
This article suggests a new method to detect the fracture of cast-in sand cores. The goal of this approach is to reduce the time and efforts as well as increase the stability of the decoring process. A testing geometry and a test rig were built to explore the decoring process in the laboratory in order to test this approach. The proposed method is based on acoustic microphony to determine any fractures and loss of contact between a casting part and the cast-in sand cores that shall be removed by a mechanical decoring process. By the use of numerical tools a prediction of the occurring eigenmodes of theoretical decoring states is possible. This method is particularly suitable for cast-in geometries that can-not be monitored by visual inspections, such as cooling channels in the cylinder heads of combustion engines.