Head lamellae pressing-molding die

Abstract

The invention relates to an oval multi-curvature head lamellae pressing-molding die, which is characterized in that the die adopts an integrally assembled structure and consists of four sets of dies;each set of dies comprises an upper die and a lower die; the upper die consists of an upper template, an upper die-body sub-module and an upper-die double-curved-surface module in turn from top to bottom; the lower die consists of a lower template, a lower die-body sub-module and a lower-die double-curved-surface module in turn from bottom to top; every component of the upper die and the lower dieconsists of uniformly distributed sub-blocks respectively; and the sub-blocks of every component of the upper die and the lower die are positioned through square keys and fixed through high-strengthbolts. The die has the advantages that: 1, as the die adopts a building-block type assembly structure, the sub-modules forming the die are convenient to process, install and detach; 2, adjacent double-curved-surface shaping modules are connected through U-shaped jamming blocks, so the die is high in overall stiffness; 3, heat-resistant embedded lumps are arranged between the double-curved-surfacemodules, so the die is long in lifespan; and 4, when the die is partially damaged, replacement cost is low.

Description

technical field [0001] The invention relates to a head flap pressing mold, which is mainly an important equipment for the passive safety assurance system of the third-generation nuclear power AP1000 advanced pressurized water reactor nuclear power plant—the overall pressing molding mold for the steel containment head flap, which belongs to the nuclear power plant Safety equipment processing technology field. Background technique [0002] The upper and lower ellipsoidal heads of the third-generation nuclear power AP1000 containment are assembled and welded by super-large plates with different radii of curvature. The manufacturing of the head flaps adopts the integral molding process, and the mold is the key factor in determining the molding process. [0003] At present, most of the small spherical tank flaps used in the petrochemical industry adopt the cold forming segmental point pressing process. This process requires smaller mold size and lower manufacturing precision, and...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing segmental point pressing technology, and provide a head flap pressing with long service life, high mold overall rigidity, accurate mold surface size, and capable of reducing the shape tolerance of the formed steel plate Forming mold and its installation method

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