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Processing characteristics and deformation control of aerospace structural parts machining
Jan 09, 2019

At present, the main structural features of aerospace structural parts machining can be summarized as: thin wall, small cross-sectional size, large external dimensions, complex structure, asymmetry and variable cross-section. The material is mainly aluminum alloy and titanium alloy with small elastic modulus. The material state is usually forgings, rolled plates or pre-stretched parts, and is generally processed by numerical control milling.

When machining aeronautical structural parts, certain internal stresses are generated inside the blank, so it is necessary to take certain measures to eliminate the stress. Moreover, the machining deformation of aerospace structural parts is affected by the blank state, cutting parameters, clamping scheme, parts and machine tool state, and its law is difficult to grasp, but as a key component of the aircraft, its deformation must be well controlled.

In general, the machining deformation of aerospace structural components is caused by a variety of factors and has many forms. According to the time, scale, cause and influence of the deformation of the part, the machining deformation of the aviation structural parts can be divided into two categories: structural local deformation and overall deformation of the contour.

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