Method for checking and finishing plate blank by using flame

Abstract

The invention discloses a method for checking and finishing a plate blank by using flame, comprising the following steps of: (A) transverse peeling: starting transversely cleaning the skin of the surface of the plate blank by using flame from any end of the plate blank to the end edge, wherein one transverse strip-shaped step is formed on the surface at the end part of the plate blank; (B) longitudinal peeling: starting longitudinally cleaning the skin of the surface of the plate blank by using flame from the bottom surface of the transverse strip-shaped step until the other end of the plate blank and repeating multiple times until the skin cleaning of the surface of the whole plate blank by using flame is finished, wherein a plurality of longitudinal strip grooves are formed on the surface of the plate blank and have the width of 4-8mm and the depth of 1-3mm; and (C) detecting and finishing: detecting the plate blank finishing the skin cleaning by flame, if surface defects existing on the plate blank are found, cleaning the skin on the periphery of the defects of the plate blank by using flame, thereby completing the finishing. According to the method for checking and finishing, the peeling check of the plate blank by using flame can be quickly carried out, concave pits in the peeling process can be avoided and the defects of the plate blank can be finished in time after check.

Description

technical field [0001] The invention relates to a flame inspection and finishing method, in particular to a method for inspecting and finishing steel plate slab surface defects and subcutaneous defects. Background technique [0002] The process of continuous casting of slabs in steel mills is as follows: the molten steel heated to liquid state is firstly packed in the ladle, then pulled by the crane to the top of the tundish, and the molten steel is poured into the tundish. The tundish is the place to hold the molten steel. The molten steel in the tundish enters the mold through the pipeline. The mold is the core component of the continuous casting machine. The mold is the part that cools the liquid steel out of the solid slab. It consists of an internal It is composed of a metal shell that continuously passes cooling water, and this shell that continuously delivers cooling water cools the molten steel in contact with it into a solid state. However, there will be various de...

AI Technical Summary

Problems solved by technology

However, the cost of mechanical peeling of slabs is high and the efficiency is low, which is not conducive to large-scale industrial production. It can only solve the problem of oxidized iron scale on the surface of steel plates, and it cannot be finished according to the defects of slabs at any time.

However, the current cleaning method of flame cleaning is unreasonable. The peeling and cleaning time of a slab is very long, and the efficiency is low. There will be surface lamination during processing, and at the same time, the skin peeled off by ordinary flame cleaning methods is very thick, resulting in a large amount of material waste

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