Edge-holding device for pre-pressing deformation of elliptical head

Abstract

The invention discloses a one-piece pre-pressing deformation edge pressing device applied to an elliptical head. The edge pressing device comprises an upper layer edge pressing ring and a lower layeredge pressing ring; a one-piece sealing head steel plate is arranged between the upper layer edge pressing ring and the lower layer edge pressing ring; the upper surface o the lower layer edge pressing ring is provided with a circle of lug boss; the lower surface of the upper layer edge pressing ring is provided with inner and outer circles of lug bosses; and a groove matched with the lug boss atthe upper surface of the lower layer edge pressing ring is arranged between the two circles of lug bosses. The edge pressing device disclosed by the invention is used for firstly implanting pre-pressing deformation of an edge pressed part of the steel plate in order to generate a higher pressing resistance than planar edge pressing so that an edge pressing force of a pressing machine is reduced, and a same edge pressing effect can be achieved; the pressing machine can just provide about 1600 tons of an edge pressing force for cold pressing of the elliptical head of which the size is 350 cm x 100 cm, so the pressure of equipment is reduced, one-time molding is also realized, and the service life of a mold is greatly prolonged. The edge pressing device disclosed by the invention are used forpressing more than 600 elliptical heads which totally satisfy the technological requirements of a drawing after inspection.

Description

technical field [0001] The invention belongs to the technical field of head processing, and in particular relates to an edge-holding device for pre-pressing and deforming an elliptical head. Background technique [0002] The head is a part of the container, which is a kind of boiler part in the pressure vessel. It is usually used to connect the two ends of the pressure vessel to the cylinder body by welding, and there is a kind of welding used for sealing the end of the pipe. Pipe fittings products. According to different geometric shapes, it can be divided into spherical, elliptical, dish-shaped, spherical-shaped, conical shell and flat cover, among which spherical, elliptical, dish-shaped, and spherical-shaped heads are collectively referred to as convex heads. . In terms of welding, it is divided into butt welding head and socket welding head. Used in various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment...

AI Technical Summary

Problems solved by technology

The edge-holding device commonly used in China is flat-edge edge-holding, and the flat-edge edge-holding force required by cold pressing is much higher than that of hot-press forming. Therefore, the pressure of the cold-pressed head is very high for the press, and the cold-pressed pressing is about 350*100cm The elliptical head requires a blank holder force of about 3,000 tons, resulting in high equipment costs, and cannot be formed at one time, and the mold is easy to wear and has a short service life

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