The technical level of domestic machine tools and foreign machine tools is very different, especially in the speed of the technical level, and there are also certain gaps in other aspects, such as machining accuracy, stability, reliability and service life. Big gap. Today, the editor mainly introduces the speed difference between the domestic high-speed machining center and the foreign high-speed machining center. The speed mentioned here refers to the spindle speed and the three-axis movement speed.
Speed of foreign high-speed machining center
The spindle speed of the foreign high-speed machining center is generally 12000-25000r / min, which is just a general high-speed machining center. Since the spindle speed of the general high-speed machining center can not meet the needs of customers, the foreign high-speed machining center is constantly innovating and improving the spindle speed. Some high-speed machining centers use electro-spindles with aerostatic bearings and magnetic bearings, and the maximum speed can reach 100000r / min. The three-axis feed of foreign high-speed machining centers generally uses high-speed rolling screw drives. The moving speed is above 40m / min, and the highest can reach 90m / min. At present, foreign high-speed machining centers all use the newly developed linear motor to drive the three-axis feed, and the speed is generally 80-120m / min.
Speed of domestic high-speed machining center
Compared with foreign high-speed machining centers, domestic high-speed machining centers are far inferior to foreign high-speed machining centers. The spindle speed of domestic high-speed machining centers is 12000-18000r / min; the feed speed of domestic high-speed machining centers is generally 30m / min Above, below 60m / min, domestic high-speed machining centers rarely use linear motors, because domestic high-speed machining centers cannot solve the high temperature caused by high-speed movement of linear motors, and the high temperature generated by high-speed movement will deform the motion guide rail and directly affect the machining accuracy. Manufacturers using linear motors in domestic high-speed machining centers all use imported linear motors.
In summary, the domestic high-speed machining center has a certain speed gap compared with foreign high-speed machining centers. Because China started late in CNC machine tool technology, it is far behind foreign CNC machine tool technology. According to data statistics, China’s CNC machine tool technology It is ten years away from foreign CNC machine tool technology.