The invention provides an ultra-high-speed electric spindle with an embedded
cold air device. The ultra-high-speed electric spindle comprises a spindle main body, a spindle shell and the
cold air device. The spindle main body and the
cold air device are arranged inside the spindle shell. An air inlet is formed in the side face of the spindle shell, and an air outlet is perpendicularly formed in the lower end of the spindle shell. The cold air device is sleeved with the spindle main body and comprises a hollow chamber, and a cooling fin is arranged at the bottom of the hollow chamber. The upperend of the side, away from the air inlet, of the cooling fin is provided with a spherical groove, and the cooling fin divides the hollow chamber into a
mixed gas chamber body and a swirl chamber body. The upper end of the cooling fin and the top of the hollow chamber form an air guide groove, and the
mixed gas chamber body communicates with the air inlet. The air guide groove is in pipeline connection with the air outlet through a cold air
pipe, a hot air port is formed in the hollow chamber, and the hot air port communicates with outside air.
Cold air is low temperature
compressed air, low temperature CO2, supercritical CO2 or low temperature
nitrogen. The
cooling effect of the electric spindle is good,
chip removal is facilitated, and a needle is not prone to being broken.