Production scheduling decision-making technology for multiple CNC machining centers with constraints on serviceable time

The tool’s life statistics module in CNC machining centers typically associates tool’s usage time with the program’s running duration, leading to the tool idle time being logged as a loss in tool life. This often triggers premature tool replacements. To enhance scheduling accuracy across multiple machining centers, we leverage spindle current variations to discern between tool loads and idle periods. Initially, real-time data from the machining center was gathered, and we employed the three-parameter Weibull Distribution method, using 1.351 (A) as the threshold to distinguish between idle and loaded tool states. Subsequently, we proposed a refined method to calculate the tool’s available time, enabling a more precise estimation of its remaining operational lifespan. We further devised a scheduling approach for multiple CNC machining centers based on the tool’s availability time. Ultimately, empirical trials exhibited a 10% increase in average cutting tool utilization efficiency and a 12.5% enhancement in machining center productivity.