Due to notches, welds are most critical regarding fatigue failure within cyclic loaded constructions. Therefore, various post-weld-treatment techniques like post-weld treatment by high-frequency mechanical impact (HFMI) treatment have been invented to improve the fatigue strength of welded details. The benefit, resulting from HFMI treatment, has already been proven by numerous studies. Since a manual HFMI treatment must be performed by a skilled and trained person to ensure an acceptable treatment quality, an automated application of HFMI treatment is supposed to result in a more reliable and consistent treatment result, which does not depend on the operator. Furthermore, a robotic application of HFMI treatment enables an economic implementation of HFMI treatment of automated welded constructions like offshore wind energy converters and various mechanical components, as these parts do not have to be taken out of the production chain to manually perform HFMI treatment. This paper focuses on the experimental investigation of the fatigue behaviour of automated HFMI-treated welds, using a developed robotic application of the HiFIT device (specific HFMI tool).

由于存在缺口，对于循环负载结构中的疲劳失效而言，焊缝是最关键的。因此，人们发明了各种焊后处理技术，例如通过高频机械冲击（HFMI）处理进行焊后处理，以提高焊接细节的疲劳强度。 HFMI 治疗带来的益处已被大量研究证明。由于手动 HFMI 治疗必须由熟练且经过培训的人员进行才能确保可接受的治疗质量，因此 HFMI 治疗的自动化应用应该会产生更可靠和一致的治疗结果，而不依赖于操作员。此外，HFMI 处理的机器人应用使得能够经济地对自动化焊接结构（例如海上风能转换器和各种机械部件）实施 HFMI 处理，因为这些部件不必从生产链中取出来手动执行 HFMI 处理。本文重点使用 HiFIT 设备（特定 HFMI 工具）开发的机器人应用程序，对自动化 HFMI 处理焊缝的疲劳行为进行实验研究。