In the modern manufacturing field of "multiple varieties, small batches, and fast pace", the electric spindle of the machining center has become the core component that determines the competitiveness of the equipment. It integrates the servo motor with the spindle unit, eliminates intermediate transmission such as belts and gears, and easily achieves a maximum speed of over 30000 r/min. Some aluminum light cutting models even reach 50000 r/min, bringing the possibility of "one-time clamping and five sided completion" for deep cavity micro milling of molds and rough cutting of aviation structural components.

High acceleration is another card of the electric spindle. The built-in motor is directly driven, and the acceleration time from 0 to 20000 r/min is less than 3 seconds, greatly reducing the cycle time of frequent start stop stations such as tapping and boring; Simultaneously positioning with the end face taper of HSK-A63 interface, repeated tool installation with radial runout ≤ 0.002 mm, eliminating the contradiction between "high speed" and "high precision".

Thermal elongation was once a stubborn problem for high-speed spindles. Nowadays, under the triple protection of axis cooling, oil and air lubrication, and thermal elongation sensor, DGZYX-15024/25-HSK runs continuously at 24000 r/min for 30 minutes, and the axial thermal drift is compressed to within 3 µ m, which is only 1/4 of the traditional external cooling structure, making the mold cutting marks a thing of the past.

Intelligent operation and maintenance are also being upgraded. Vibration, temperature, current, displacement and other state quantities are collected in real time and uploaded to MES after edge computing; When the bearing experiences initial damage, the system can provide a two-week warning and offer a more optimal shutdown window, helping the factory achieve "predictive maintenance" and increase OEE by more than 8%.

Looking ahead to the future, with the maturity of carbon fiber rotors, SiC drives, and liquid nitrogen cooling technology, the electric spindle of machining centers will move towards the dual limits of "ultra-high speed super high power" of 100000 r/min and 500 kW, providing stronger cutting power for emerging industries such as new energy vehicles and humanoid robots.