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Rotary axis structure of five-axis machining center

The rotary axis structure plays an important role in the function and performance of the five-axis machining center machine tool. In recent years, its structural development mainly includes the following four aspects:

(1) Use torque motor drive to reduce mechanical transmission and improve dynamic performance, such as CYTE’s CyMill universal milling head;

(2) Develop A/B/C three-axis swing milling heads to make angle changes more flexible and faster, such as the M3A/B/C three-axis swing angle milling head from German Zimmermann Company;

(3) Develop compact A/B double-swing milling heads. For example, the swing angle of the DTH-type A/B double-swing milling head of Italian RAMBAUD1 company has been increased to 45°. In addition, the parallel link mechanism milling head developed by Qi Er Machine Tool Company in my country is suitable for the A/B swing angle of the horizontal axis. It is novel, but the swing angle range is small.

(4) The structure that uses 45° inclined plane rotation to convert the axis vertically or horizontally is generally called the B-axis. Due to the large rotation joint surface, the stiffness and braking torque can be improved. However, when the inclined plane rotates 180°, the axis swing angle is only 90°. , so the swing angle range is smaller, and it is more suitable for occasions where five-sided processing is the main purpose.

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