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| Research on High Effciency Machining of Titanium Alloy Integral Structural Parts With Large Depth-Width Ratio |
| MU Jianwei, LI Liangliang, SUN Guoyan |
| AVIC Shenyang Aircraft Industrial (Group) Co., Ltd., Shenyang 110034, China |
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Abstract 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.
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2022, 
