METHOD FOR MANUFACTURING A MULTILAYER ROTARY SHELL WITH OUTER RING THICKENINGS AND PROTRUSIONS Russian patent published in 2022 - IPC B32B1/04 B29C70/30 B29C53/56 

FIELD: composite materials.

SUBSTANCE: invention relates to the technology of manufacturing products from composite materials, namely, multilayer rotary shells for power structures. In the manufacture of a multilayer rotary shell with outer annular thickenings and protrusions, the workpieces are cut out of carbon fabric impregnated with an epoxy binder. The blanks are laid out on the outer surface of the inner part of the shell previously made of carbon fiber. Three batches of blanks of various configurations are cut out. The contour of the blanks of the first batch is half of a trapezoid with a side surface conjugated with annular tongues, the width of which corresponds to the width of the annular thickenings of the manufactured shell. One of the ring tongues is paired with an annular tongue made in the form of a triangle, the width of which corresponds to the width of the annular protrusions of the manufactured shell. The contour of the blanks of the second batch repeats the contour of the blanks of the first batch with the exception of the annular tongue. The contour of the blanks of the third batch, made in the form of a triangle, corresponds to the contour of the annular tongue of the blanks of the first batch. The height of the trapezoid of the blanks of the first and second batches is equal to the length of the forming shell of rotation. When laying out, the blanks of the first batch are first laid out sequentially, shifting the blanks in the annular direction and forming outer annular thickenings. Then the blanks of the second batch are laid out sequentially, shifting the blanks in the annular direction. A stack of duplicated blanks of the third batch is placed on the tongue of each of the blanks of the first batch, continuing the formation of annular thickenings and forming protrusions, after which the operations of laying out the blanks of all three batches in the same order are repeated until the required thickness of the laid out package is obtained and the resulting package is cured.

EFFECT: monolithic structure of the multilayer shell material is obtained in the zone of external annular thickenings and the strength of the protrusions is increased.

2 cl, 8 dwg