Cold metal plate strip cold continuous rolling production line and production method

Abstract

The invention relates to a cold metal plate strip cold continuous rolling production line, which comprises at least uncoiling machine (1), a plate strip head and tail cutting machine (2), welding equipment (17), a stretching and straightening device (4), at least one jet flow descaling unit (5), tension rolls (11), a trimming device (15), randomly selected cold continuous rolling machine set (9), flying shears (7), a coiling machine (8), and a movable sleeve device, wherein the stretching and straightening device (4) comprises at least two tension roll groups (11) and a bending roll group (12); the tension roll groups (11) are arranged in front and at back of the jet flow descaling unit (5) respectively; and the movable sleeve device is only welded between the welding equipment and the stretching and straightening device (4). When the continuous type metal plate strip cold continuous rolling production line and a high-pressure jet flow descaling mode are improved, the productivity of the cold continuous rolling line is improved obviously, the environmental-protection control index of the cold rolling process segment is obviously improved, and the floor area and maintenance cost of the production line are reduced.

Description

technical field [0001] The invention relates to the technical field of removing scales on the surface of cold metal strips, and is mainly used to realize continuous and rapid removal of the attached crops on the surface of cold metal strips, such as iron oxide scale (commonly known as iron scale) produced during hot rolling. Scales) and the corrosion layer attached to the surface, adhesives, etc., to ensure that the surface of the metal strip has a smooth background color, and effectively improve the surface quality of the post-treatment process of the metal strip. Background technique [0002] During the hot rolling or heat treatment process of steel, alloy and other metal materials, a layer of dense covering composed of metal oxides will be formed on the surface, commonly known as "scale". The existence of this scale will affect further processing. : On the one hand, the surface cracks of the material are not easy to be found in advance, so that there are quality problems ...

AI Technical Summary

Problems solved by technology

Simultaneously, since 2001, Canada's TMW company has disclosed a series of removal technologies for the surface scales of metal strips, such as US20080108281 (A1), US20080182486 (A1) and US20090227184 (A1), etc. The mud mixed with water is sprayed and cleaned. This method also encounters technical bottlenecks such as the separation of abrasives and scales, abrasive wear detection technology, and automatic replenishment technology, so it is difficult to realize; The cleaning device is mainly for descaling of various continuous casting slabs, which cannot meet the requirements of cold rolling; Japanese patents JP05092231A, JP09085329A and JP2002102915, etc., use high-pressure water jet descaling only for hot billets or during forging forging billet

[0006] In the downstream of the descaling process section, in order to ensure that there will be no abnormal accidents such as strip breakage under the high tension control standard of the front and rear units during the rolling of the metal strip into the continuous rolling mill, the production site usually uses disc shears to cut the surface of the metal strip. The purpose of longitudinal trimming is to improve the quality of the edge and reduce the crack growth of the edge. However, with the increase of the proportion of high-strength steel and the rapid expansion of other varieties such as silicon steel, the traditional disc shears often cause abnormal chipping or cracking. Stuck and other phenomena directly affect the production capacity of the entire production line

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