Manufacturing method on structural and functional integration of the small-diameter and variable section composites inlet

Abstract

The internal dimension of a small diameter variable cross-section composite inlet is small,the surface treatment is difficult,and the overall manufacturing is difficult. How to reduce the process difficulty on the basis of meeting the surface quality requirements of the inlet,and at the same time endow the parts with functionality,is an urgent problem to be solved. A manufacturing method is proposed,which can realize structural and functional integration. The block and combined structure design is adopted,then the skin parts with uniform thickness(surface waviness not exceeding 0.5 mm) and small deformation are formed under the process control. To solve the problem of seam level difference between segmented skins,the synergistic method of flange edge connection and fixed connection with plate is adopted. After assembly alignment,the surface quality of the inlet cavity meets the requirements,and the effective filling of the joint further guarantees the realization of the aircraft function. Then the composite air inlet that meet the design and usage requirements has been successfully manufactured.

Keywords

• composites
• inlet
• autoclave molding
• seam step difference