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

通过文献研究表明，混合振动辅助石材加工有待进一步研究。特别是关于实现的振动激励或更确切地说，振动方向，可以注意到，大量的出版物处理轴向激励。然而，对于具有切向激励的混合系统，研究还很少。此外，在这一领域的少数出版物只略微涉及超声辅助切割技术。他们还专注于切向振动产生的理论可能性，而不是应用的可能性和对成功应用所必需的基本机制的理解。到目前为止，许多问题都被完全忽略了，包括关于工艺或材料特定参数的问题，关于考虑待加工材料的适当加工策略的问题，以及关于提高加工质量的可能措施的问题。因此，有必要对具有切向激励分量的振动辅助加工进行研究。因此，本研究项目的目的是为了更好地理解切向激励振动辅助切削的机理，以及推导出的加工策略和参数，以便在混合切削过程中成功应用。为此，本项目将开发和研究切向振动声电极的几个概念。随后的切割试验旨在发现振动辅助石材加工中的主要相关性，并增加对工艺的理解。此外，所获得的发现将用于制定生产指南和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.