Active Power-based Drilling Process Monitoring for Adaptive Process Control of a CNC Machine Tool

In aerospace high-strength layered composites which are mostly joined by riveting are used. This demands prior drilling of the composite material. Since the two individual materials usually require opposing drilling parameters (e.g. titanium and CFRP), compromise parameters are currently used. Thus, manufacturing quality is limited and tool wear is high. This article presents an effective powerbased drilling process control, which enables material-specific switching of process parameters. The detection logic is based on the dynamic part of the spindle effective power and proves tobe accurate and robust in several drilling series. Moreover, an increased manufacturing quality is recorded. © 2023 Walter de Gruyter GmbH, Berlin/Boston, Germany.