BUILT-UP MANDREL FOR MANUFACTURE OF CYLINDER-SHAPED PARTS Russian patent published in 2003 - IPC

FIELD: built-up mandrels that are used for manufacture of large-sized, heavy cylinder-shaped parts (vessels, pipes) by winding and impregnation (for composite materials) or casting (for compound, at casting used jointly with the external process housing), can be used in various branches of national economy, for example, for manufacture of the stator of the spiral magnetocumulative generator. SUBSTANCE: the built-up mandrel for manufacture of cylinder-shaped parts has separate segments installed in a spaced relation to one another, made in the form of fastened sectors with stiffening ribs, installed on the mandrel ends are covers that are made with annular bulges, and the sectors are made in pairs, one pair is smaller than the other, and installed in pairs parallel to each other, and the stiffening ribs on the smaller pair are made for overlapping the stiffening ribs of the larger pair. The sectors are fastened on a shaft with the aid of supporting members made in the form of plates secured on the shaft for movement relative to it in the radial direction. Mating guides for movement of the plates may be made on the shaft. EFFECT: simplified assembly (mounting) and extraction of the mandrel from the article, enhanced stability of the cylindrical shape, volumetric stiffness of the construction, enhanced quality of the manufactured article. 3 cl, 2 dwg