This article proposes a new method to classify the decoring behaviour of different cast-in sand cores for light metal casting. Sand cores are in use to realise hollow structures in casting parts. More and more inorganically bound sand cores are used due to environmental requirements, which, in contrast to organically bound sand cores, do not disintegrate during the casting process. The inorganically bound cast-in sand cores need to be removed after the casting process by a process called decoring. A test rig derived from the industrial decoring process was built to investigate the decoring behaviour and to measure the effort of decoring. The proposed method is based on single impulses imposed on the test geometry. The goal of this approach is to understand the factors influencing the decoring behaviour of a sand core. Therefore, different sand-binder systems, with varying amounts of binder and different grain size distributions, were decored and examined with the developed test rig. A validation of the experimental results using simulation methods showed a high influence of the residual compression strength of the sand cores to their decoring behaviour. The authors showed that specimens with a higher amount of residual compression strength are more difficult to decore than specimens with a lower amount of residual compression strength. The methods and results presented in this article build the foundation to model a digital twin of the decoring process which is a missing link in the digital process chain in casting technologies.

本文提出了一种新的方法来对轻金属铸造用的不同铸砂芯的装饰行为进行分类。砂芯用于在铸件中实现空心结构。由于环境要求，越来越多地使用无机结合的砂芯，与有机结合的砂芯相比，在铸造过程中不会崩解。在铸造过程之后，需要通过一种称为装饰的过程来去除与无机结合的砂芯。建立了一个从工业装饰过程中衍生的测试设备，以研究装饰行为并衡量装饰工作量。所提出的方法基于施加在测试几何形状上的单个脉冲。这种方法的目的是了解影响砂芯装饰行为的因素。所以，使用开发的试验台对不同的砂结剂系统（具有不同的粘结剂量和不同的粒度分布）进行了装饰和检查。使用模拟方法对实验结果的验证表明，砂芯的残余抗压强度对其装饰性能有很大影响。作者表明，具有较高残余抗压强度的标本比具有较低残余抗压强度的标本更难装饰。本文介绍的方法和结果为装饰过程的数字孪生建模提供了基础，而数字孪生是铸造技术中数字过程链中缺少的环节。使用模拟方法对实验结果的验证表明，砂芯的残余抗压强度对其装饰性能有很大影响。作者表明，具有较高残余抗压强度的标本比具有较低残余抗压强度的标本更难装饰。本文介绍的方法和结果为装饰过程的数字孪生建模提供了基础，而数字孪生是铸造技术中数字过程链中缺少的环节。使用模拟方法对实验结果的验证表明，砂芯的残余抗压强度对其装饰性能有很大影响。作者表明，具有较高残余抗压强度的标本比具有较低残余抗压强度的标本更难装饰。本文介绍的方法和结果为装饰过程的数字孪生建模提供了基础，而数字孪生是铸造技术中数字过程链中缺少的环节。作者表明，具有较高残余抗压强度的标本比具有较低残余抗压强度的标本更难装饰。本文介绍的方法和结果为装饰过程的数字孪生建模提供了基础，而数字孪生是铸造技术中数字过程链中缺少的环节。作者表明，具有较高残余抗压强度的标本比具有较低残余抗压强度的标本更难装饰。本文介绍的方法和结果为装饰过程的数字孪生建模提供了基础，而数字孪生是铸造技术中数字过程链中缺少的环节。