Basic investigations for increasing the performance of stone machining with tangentially vibrating, ultrasonically excited tools

文献研究表明，混合振动辅助石材加工还需要进一步的研究。特别是关于所实现的振动激励或振动方向，可以注意到大量的出版物涉及轴向激励。然而，混合动力系统与切向激励几乎没有被检查。此外，该领域的少数出版物仅少量涉及超声辅助切割技术。他们还专门集中在理论上的切向振动产生的可能性，而不是对应用的可能性和理解的基本机制，必要的一个成功的应用程序。到目前为止，许多问题还没有被考虑到，包括工艺或材料参数、考虑到被加工材料的合适加工策略以及提高加工质量的可能措施等问题。因此，有必要对切向激振部件的振动辅助加工进行研究。因此，本研究项目的目的是更好地了解与切向激励的振动辅助切削的机制，以及衍生的加工策略和参数，成功地应用于混合切削过程。为此目的，切向振动超声焊极的几个概念将在本项目中开发和研究。随后的切削试验旨在发现振动辅助石材加工中的主要相关性，并增加对过程的理解。此外，所获得的研究结果将用于制定生产指南，并确定超声辅助石材加工的最佳工艺参数窗口。

A literature research has been carried out, demonstrating that further research is needed into hybrid vibration-assisted stone machining. Particularly with regard to the realised vibration excitation or rather the vibration direction, it can be noticed that a large number of publications deals with axial excitation. However, hybrid systems with tangential excitation have hardly been examined yet. In addition, the few publications in this field deal only marginally with the technology of ultrasonically assisted cutting. They also concentrate exclusively on the theoretical possibilities for tangential vibration generation, but not on the possibilities for the application and the understanding of the fundamental mechanisms necessary for a successful application. Many questions have been completely left out of consideration until now, including questions about process or material-specific parameters, about suitable machining strategies taking account of the material to be machined and about possible measures to improve the machining quality.Hence there is a need for action regarding the research into vibration-assisted machining with a tangential excitation component. Thus the aim of this research project is to better understand the mechanisms of vibration-assisted cutting with tangential excitation as well as the derived machining strategies and parameters for a successful application in hybrid cutting processes. For this purpose, several concepts of tangentially vibrating sonotrodes will be developed and examined in this project. The subsequent cutting tests are intended for discovering the predominant correlations in vibration-assisted stone machining and increasing the process understanding. In addition, the findings gained will be used for working out production guidelines and identifying an optimum process parameter window on ultrasonically assisted stone machining.