A 5-axis simultaneous machining center (5-axis simultaneous machining center) is a high-precision CNC machine that achieves simultaneous machining using the X, Y, and Z linear axes and two rotary axes (two of the A/B/C axes). It is capable of machining complex curved surfaces, special-shaped workpieces, and inclined holes. It uses the RTCP function to automatically correct the tool tip trajectory, allowing for five-sided machining in a single clamping. This equipment is widely used in aerospace, automotive molds, medical devices, and other fields. Key technical specifications include X-axis travel ≥2440mm, Y-axis ≥1200mm, and Z-axis ≥750mm, with traversing speeds of up to 26m/min on the X axis and 60m/min on the Y axis. The national standards “Test Conditions for Five-Axis Machining Centers” (GB/T 34880-2017), “RTCP Precision Test for Five-Axis Machining Centers” (GB/T 39953-2021), and “Precision Test for S-Shaped Specimens for Five-Axis Machining Centers” (GB/T 39967-2021) were implemented on May 1, 2018, and October 1, 2021, respectively. Breakthroughs have been achieved in the localization of CNC systems and core components such as direct-drive rotary tables, with some products reaching internationally advanced levels. Equipment is trending toward intelligentization, integrating AI-powered vibration suppression, thermal deformation compensation, and digital twin technologies. Simultaneously, it is developing towards hybridization, expanding milling and turning capabilities, and ultrasonic machining. The NK530M five-axis machining center’s CNC system achieves nanometer-level control accuracy and is equipped with RTCP tool tip control and HPCS-HPPS five-axis tool path smoothing technologies. The linkage accuracy error is controlled within 0.03 mm through “reverse linkage data acquisition and spatial circle fitting,” ensuring the “S-shaped test piece” passes the test on the first try. Five-axis linkage machining centers are already used in the precision machining of joint components, harmonic reducers, and other applications in the field of humanoid robots. A diverse product line includes vertical, gantry, and mill-turn models.
