Beschreibung
Machining of steels for aerospace industry, such as 300M, is challenging due to the high ductility, hardness and tensile strength. During turning, long continuous chips usually form. These continuous chips decrease the process reliability. In addition, the workpiece surface can be damaged. Heat removal from the machining process is also impeded by inadequate chip flow. This leads to increased thermal loading on the tool and premature tool failure. The cooling strategy exhibits a crucial role in reducing these effects. This study investigates the effects of coolant pressure and concentration on tool wear, process forces and chip formation during turning. Experimental analyses show that coolant concentration and pressure influence tool life, while an optimal balance is required to prevent thermal overload. The results suggest that directed coolant nozzles and process-adapted pressures enable resource-efficient cooling strategies and also improve chip formation and chip breaking behavior.
