With the continuous improvement of aircraft performance, the requirements of aircraft parts are strict increasingly. Under the precondition of satisfy the strength, stiffness, aviation parts, as far as possible when the design consideration to reduce weight, reduce the assembly. As a result, several typical characteristics of modern aviation parts: complicated structure, large, thin wall parts, materials for aluminum alloy, titanium alloy, is extremely strict quality requirements, and small batch and many varieties, etc.

The characteristics of aviation parts itself determines its processing method. Shape simpler structure, using three axis or four axis machine tool can also be processed. But restricted by cutting tool and the relative position of parts, could take multiple clamping parts processing. Every increase the clamping, increases a error sources, which may effect the precision of the final parts, and increase the processing time.

Similarly, restricted by cutting tool and the relative position of parts, the programmer must be extremely careful to avoid the interference of tool and parts, it is often difficult to use knives and the best cutting position, cutting efficiency is extremely low.

Shape of complex structure, cannot use three axis or four axis machine tool for processing. Five-axis linkage machining way, because there are two axis of rotation, cutting tool and the relative position of the flexible parts, can be achieved under the condition of a clamping parts for processing as a whole. Tool to be close to the ideal Angle cutting surface, realize the best cutting conditions. Five-axis linkage machining technology is the trend of the modern aviation parts manufacturing.

Five-axis linkage control technology, such as interpolation algorithm, such as coordinate transformation, all has developed very mature. Five axis machining center of technical difficulties still lies in its structural design. Although in theory, all which has the function of five-axis linkage machine can processing structure, blades, impeller or semal, but different machining efficiency and machining accuracy of machine tools, and even clamping number but there is a big difference. The domestic mold industry now has a lot of five axis machining center, but for mould industry's five axis machining center is not suitable for the aviation manufacturing industry. Suitable for aerospace manufacturing of five axis machining center should be has the very high static and dynamic rigidity, to withstand heavy cutting when the cutting force. Long tool life comes from a stable, low vibration cutting - this is the key factor of low-cost processing. The structure of five axis machining center used in aviation manufacturing should adapt to the characteristics of aviation parts processing technology.