In the context of the manufacturing process of some essential parts of advanced fighter aircraft

the task of process planning

as well as the concern of efficient and accurate machining for titanium alloy integral structural parts with large depth-width ratio

acts as a major bottleneck. In this paper

based on the analysis of the material characteristics and structure features of the integral wing rib

coupled with the analysis of its corresponding machining difficulties

the overall efficient machining process route is firstly formulated

which entails the collaborative manufacturing of three-axis machine tool and five-axis machine tool. The clamping points are thus determined by considering the characteristic of variable stiffness. On account of the characteristic of small curvature of the cutting area

the machining strategy with the conditions of constant angle and large side-step upheld is adopted. Aiming at the existing problems of chatter of the deep cavity machining and low efficiency

a rigidity and stability oriented layered milling method is thereby proposed. With the demand of precise weight

an additional angle assisted precision machining method for narrow angle without uncut material is then presented. Finally

the parts quality and machining efficiency are guaranteed by adopting the aforementioned methods

thus providing technical support for the mass production.