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Manufacturing method for profile steel used for protective seal doorframe

A manufacturing method and technology of section steel, applied in the direction of metal rolling, etc., can solve the problems of affecting the airtight effect, difficult to eliminate internal stress, difficult to ensure height, etc., and achieve the effect of eliminating welding process, low cost and less production process

Active Publication Date: 2016-08-03
BEIJING JINYU SHUNDA TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] a. Low production efficiency: Even if automatic welding line is used for production, the production rate does not exceed 100 meters / person / day
[0008] b. The quality of the section steel is defective: the internal stress caused by welding is difficult to eliminate, and the gradual deformation occurs during use, which affects the airtight effect; the three pieces of section steel are fused, the structural strength is not high, the surface is rough, and the appearance is affected
In addition, the oblique ribs are thin and high, in the position of dead legs, and the rolling process is constantly stretched, and its height is difficult to guarantee

Method used

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  • Manufacturing method for profile steel used for protective seal doorframe
  • Manufacturing method for profile steel used for protective seal doorframe
  • Manufacturing method for profile steel used for protective seal doorframe

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] The manufacture method of section steel for protective sealing door frame of the present invention comprises the following steps:

[0034] 1) Select the billet as the raw material, through the first hot rolling process and the second hot rolling process, adopt the method of extension, pre-roll the upper surface and one side of the raw material into a stepped shape, and prepare for strong stretching; Figure 3a , 3b shown.

[0035] 2) Through the third hot rolling process, the stepped side is extended, and the forced widening is carried out while extending, so that it forms a sufficiently long oblique rib 1; as Figure 3c shown.

[0036] 3) Turn the raw material counterclockwise at 90 degrees, and use the fourth cutting process to cut the upper and lower parts of the raw material, so that a vertical rib 2 is for...

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Abstract

The invention relates to a manufacturing method for profile steel used for a protective seal doorframe. The manufacturing method comprises a rough rolling procedure and a finish rolling procedure. An induced spreading and splitting method is adopted for the rough rolling procedure, and raw materials are rolled to be a prototype of the profile steel used for the protective seal doorframe. A negative spreading method is adopted for the finish rolling procedure, the effects that a vertical bar is lengthened and shrinking-drawing of an diagonal bar is reduced are ensured, a partial induced spreading method is adopted, and the length of a leg is ensured. With the adoption of the manufacturing method, integral forming is achieved, so that the production efficiency is high and is improved by at least 10 times compared with that of profile steel welding. Inner stress is eliminated during hot rolling, so that the quality is good. The number of production procedures is small, and thus the cost is low. The welding process is omitted, and thus energy conservation and environment protection are achieved.

Description

technical field [0001] The invention belongs to the fields of metal pressure processing and material forming, and in particular relates to a method for manufacturing section steel for a protective and sealed door frame. Background technique [0002] The protective airtight door is an important civil air defense facility in our country. The demand for the section steel for the manufacture of the protective airtight door frame is large, and it is still formed by welding methods, such as figure 1 As shown, its production process is as follows: [0003] Steel billet—hot rolled into angle steel 3—straightening [0004] Steel billet—hot rolled into oblique bars 1—straightening—cutting—welding—straightening [0005] Steel billet—hot rolling into vertical bars 2—straightening [0006] There are following problems in this production method and the section steel it produces: [0007] a. Low production efficiency: Even if the automatic welding line is used for production, the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/08B23P15/00
CPCB21B1/08B23P15/00
Inventor 杨庆凯
Owner BEIJING JINYU SHUNDA TECH CO LTD
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