L-shaped notch of H-shaped steel and cutting technology of oblique notch

Abstract

The invention provides an L-shaped notch of H-shaped steel and a cutting technology of an oblique notch. The technology comprises the following steps that first, the H-shaped steel is horizontally placed on a cup support, and cutting lines are marked on the front face and the back face of a flange slab of the H-shaped steel; second, cutting is conducted along the cutting line on the front face of the flange slab of the H-shaped steel; third, the H-shaped steel is erected; fourth, then cutting is conducted along the cutting line; fifth, a supporting rod is arranged on the cutting line on the front face of the flange slab, and cutting is conducted along the remaining cutting line under the assisting of the supporting rod; sixth, the H-shaped steel is overturned to enable the back face, which has not been cut, of the flange slab of the H-shaped steel to face upwards; seventh, the steps from the second to the fifth are executed again, and then cutting is conducted along the cutting line of the H-shaped steel until the entire H-shaped steel is cut to be a needed H-shaped steel finished product. According to the L-shaped notch of the H-shaped steel and the cutting technology of the oblique notch, the supporting rod is used as the support of a cutting gun so that the cutting gun can smoothly and precisely cut the H-shaped steel, and the cutting quality is guaranteed. Moreover, the operation difficulty of the H-shaped steel is greatly lowered, the potential safety hazards of safety production are avoided, and the production cost is lowered.

Description

Technical field [0001] The invention relates to a cutting process of H-shaped steel, in particular to a cutting process of L-shaped incision and oblique incision of H-shaped steel, and belongs to the petrochemical and mechanical fields. Background technique [0002] The modular design and construction of liquefied natural gas plants has become a dominant technology trend in compliance with the global liquefied natural gas market. A modular LNG plant is composed of hundreds of modules. Each module contains several layers of decks. The H-shaped steel diagonal brace members on each deck are generally cut and welded with "L" cuts and oblique cuts, and are connected to the beams or longitudinal beams through the ribs. One. With the rise and development of the modular construction market in China, the number of modular projects is increasing, and the use of diagonal brace members for H-beam connection has also become a trend. Therefore, in the process of module construction, the Cut...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the vertical angle of cutting is carried out according to the personal feeling of the operator; the cutting result cannot be judged

Therefore, it is easy to cause the web surface of the H-shaped steel and the triangular surface of the wing to form rough grooves; the cutting quality cannot meet the production needs, and the amount of subsequent rework is large, so the production cost is higher;

[0005] 2. Because the operator himself uses the object to ensure the balance and stability of cutting; therefore, not only the operator's operation is difficult and the labor intensity is high; moreover, the cutting efficiency is low, which also brings hidden dangers to safe production;

[0006] 3. In the process of cutting the upper and lower wings on both sides of the H-shaped steel, the burning and oxidation will make the cutting line of the web surface blurred or disappear; therefore, it is necessary to make up for it by scribing twice, which is a waste of man-hours

Images