In this thesis, the optimization of changeover time on a CNC milling machine is examined with the aim of increasing productivity and flexibility within the manufacturing process. The problem stems from long idle periods, which significantly affect machine efficiency in small batch production. To analyse the current state, the SMED method was applied, dividing activities into internal and external tasks. This was followed by a systematic optimization of these activities. A key improvement is the introduction of a standardized quick clamping zero point system, which preserves reference points and eliminates the need for repeated calibration. The results show that the setup changeover time was reduced from 144 minutes to 27 minutes, representing approximately 80 % time saving. A clamping repeatability analysis confirmed the system's sufficient accuracy. The implemented changes enable an increase in annual production by approximately 5,7 % and contribute to greater market competitiveness and adaptability of the manufacturing process.
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