Motion Control Design for Peck Rigid Tapping Cycle Machining to Manufacture Internal Threads

This study aims to develop a motion control design that integrates the constrained acceleration-and-deceleration (ACC/DEC) algorithm, synchronous motion control, and best-fit control parameter tuning. This design enables the spindle system of a computer numerical control (CNC) machine tool to perform rapid and synchronous repetitive motions in peck rigid tapping cycle (PRTC) machining, ensuring that the internal threads produced have good surface texture and dimensional accuracy. A three-axis CNC machining center was used to perform the PRTC machining experiment and ultrasonic vibration-assisted tapping (UVAT) experiment. These experiments validated the feasibility and performance of the developed motion control design and evaluated the performance and applicability of PRTC machining and UVAT methods for manufacturing internal threads.