Design of hole matrix unit for high-precision batch hole making of acoustic lining assembly of aero-engine

Acoustic lining assemblies with millions of high-density array holes are key structures for high-performance and low-noise aero-engines. However, the material specificity, variable curvature shape structure, high-order number holes, small-sized hole spacing acoustic pose great challenges to hole-making technology. In this paper, in view machining requirements a matrix unit design method batch making is proposed. The optimal dimension calculated angle deviation normal vector as constraint by matching structural features assembly, dividing interpolating surface, solving position. experimental results show that proposed can effectively control ensure processing accuracy holes.