Civil defense door board bending process and device thereof

Abstract

The invention discloses a civil defense door board bending process, and relates to the field of civil defense doors. The process comprises the following steps: cleaning: dust and other particles attached on the surfaces of steel plates are removed; raw material detection: the structural strength and the flatness of the steel plates are detected to eliminate unqualified steel plates; molding: partsto be bent of the steel plates are heated; and then, the steel plates are bent by adopting a pressing plate, or in the state of bending the steel plates by the pressing plate, the bent parts of the steel plates are heated; molding waiting time: the state of bending the steel plates by the pressing plate is lasted by 3-5 minutes; cooling: the pressing plate is cooled by adopting cooling liquid; and unloading: the bent steel plates are taken down. Aiming at the problem of instable bend molding in the prior art, the process adopts the heating mode to conveniently reach stable bending angle afterbending of the steel plates; and in addition, the cooling liquid is used for quickly reducing the stability of the bent parts of the steel plates and improving the passivity of materials of the bentparts, so that the molded steel plates are difficultly deformed.

Description

technical field [0001] The invention relates to the field of civil air defense doors, more specifically, it relates to a bending process and device for civil air defense door panels. Background technique [0002] The door of the entrance and exit of the underground protection project is called the civil air defense door, and the civil air defense door belongs to the civil defense protection equipment. Common steel frame hollow civil air defense doors include an inner frame welded by hollow steel pipes, and steel plates welded on the surface of the inner frame. Before the steel plate is welded and used, it is necessary to bend the steel plate to facilitate the matching of the shape of the steel plate with the inner skeleton. [0003] For the existing bending process, such as the Chinese patent whose patent publication number is CN105363862A, it discloses a metal plate bending process, including the following steps: bending; fixing, moving the plate after bending to the shapi...

AI Technical Summary

Problems solved by technology

[0005] In view of the problem of unstable bending and forming in the prior art, the purpose of the present invention is to provide a bending process and device for civil air defense door panels, which facilitates the formation of stable bending angles of the steel plate at the bending position and improves the forming of the bending position of the steel plate. precision

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