H-shaped steel component flange plate outer side datum line marking method

Abstract

An H-shaped steel component flange plate outer side datum line marking method includes the following steps that firstly, a universal pattern is manufactured, wherein the pattern comprises a work panel, framework outer rib plates, framework inner rib plates, multiple stiffening plates and a web contact bottom plate, and ruler scales are marked on the work panel; secondly, the universal pattern is arranged at different positions of an H-shaped steel component flange plate in a bridging mode, when placed, the web contact bottom plate needs to make stable contact with the surface of a web, and the framework inner rib plates are close to one side of the ruler scales and closely attached to the flange plate; thirdly, the half-thickness value of the web is read on the ruler scales, a datum point is marked at the position, and then datum points at different positions are connected to form a datum line; fourthly, re-check and correction are conducted. The web serves as a positioning reference, can directly guarantee the marked flange plate outer side datum line coincides with the thickness center line of the web, the marking quality and precision are high, influences and constraint factors are few, the requirements of procedure deviation and deformation are low, correction is convenient, efficiency is greatly improved, and the construction cost is reduced.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of steel structure manufacture and installation, and relates to a method for drawing a reference line outside a flange plate of an H-shaped steel member by using a general template. [0003] Background technique: [0004] The outer datum line of the flange plate of the H-shaped steel member is mainly used for the assembly and welding positioning of the flange plate side accessories and the installation check of the overall member (accuracy can only be guaranteed based on a unified benchmark), for design force considerations , which should coincide with the centerline of the web thickness. The usual method of drawing the baseline is as follows: figure 1 As shown, that is, the width center point 4 of the flange plate 5 is measured by a steel plate ruler 3 at different positions, and then the width center point 4 at different positions is connected to form a reference line 5, or the web drawn on the fla...

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Problems solved by technology

[0006] 1. There are many factors affecting the drawing of the datum line (cutting and blanking accuracy of the flange plate, assembly accuracy, welding deformation, etc.), and the quality is not suitable to be guaranteed (it is difficult to ensure that the datum line of the flange plate coincides with the center line of the web thickness);

[0007] 2. Due to the main constraints of the flange plate itself and the accuracy of its assembly with the web plate, the quality requirements for the blanking, assembly and welding processes are relatively strict, resulting in increased costs and extended construction periods;

[0008] 3. It is difficult to correct the baseline deviation caused by the above factors, which will increase the cost and reduce the efficiency

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