MANDREL FOR WINDING OF CONIC SHELLS FROM POLYMER COMPOSITE MATERIALS AND METHOD OF MANDREL APPLICATION FOR WINDING OF CONIC SHELLS FROM POLYMER COMPOSITE MATERIALS Russian patent published in 2009 - IPC B29C53/82 B29C53/56 

FIELD: technological processes; mechanical engineering.

SUBSTANCE: invention may be used in production of body or reservoir-adapters of aircrafts used in rocket and aviation engineering. Mandrel for winding of conic shells from polymer composite materials comprises two-place body with shape-generating surfaces and separating belt, and mechanism for shells removal. Separating belt is equipped with windows that are evenly distributed on the whole of its surface and insulating layer that covers windows, openings of which contain mechanism drives - pressing screws installed with recess relative to links between windows. Pressing screws with their pressing element are installed face to face to movable detachable ring, which is installed, in its turn, face to face to step of separating belt with projection above external surface of links with the provision for sliding on shape-generating surface in area of produced shell rib shaping. At that shape-generating surface of mentioned area is provided with annular groove filled with easily breakable composition of the basis of gypsum that separates area of rib shaping into area of working rib and area of technological rib. Method of mandrel for winding of conic shells from polymer composite materials includes operations used to assemble the mandrel. Mandrel comprises two-place body with shape-generating surfaces and separating belt, mechanism for removal of shells and fibers from high-strength material impregnated with synthetic binder. Spiral turns of shells and annular turns of ribs are wound on mandrel, thus providing required tension of fibers. Prior to winding, removable ring is installed on shape-generating surface of rib face to face to step of separating belt with projection above external surface of separating belt. Then insulating layer is laid with overlapping of separating belt windows, where pressing screws of removal mechanism are installed below the level of separating belt external surface face to face to removable ring. On completion of primary winding, pressing annular turns are wound on separating belt to increase tension of spiral turns. After thermal treatment shell is mechanically processed, removing material from separating belt and cutting rib into working and technological ribs. At that shell is pushed off the mandrel with the help of pressing screws that affect the technological rib via removable ring.

EFFECT: higher reliability of mandrel operation due to exclusion of possibility for synthetic binder ingress into mechanism and prevention of its damage, prevention of shape-generating surfaces damage by cutting tools in process of shells mechanical treatment due to higher quality of shells at more even tension of spiral fibers in process of winding, higher manufacturability of mandrel application.

4 cl, 6 dwg