Method for eliminating ridge buckle of strip steel at finishing machine in production of thin and ultra-thin strip steel

Abstract

The invention provides a method for eliminating a ridge buckle of strip steel at a finishing machine in production of thin and ultra-thin strip steel, and belongs to the technical field of pressure processing of thin strip steel. The method comprises the steps of raw material selection, thickness control, cleaning inspection, welding inspection, adjustment of a light press, adjustment of a withdrawal and straightening machine, and regular inspection and calibration. According to the method, through optimization of the raw material quality, steel type, specification transition, welding qualityand tension of strip steel, as well as optimization and adjustment of equipment parameters, function precision and other aspects, the problem of the ridge buckle at the finishing machine in the production process of the thin strip steel is solved.

Description

technical field [0001] The invention belongs to the field of pressure processing of thin-gauge steel strips, and in particular relates to a method for eliminating ribbing at a skin-pass machine on a thin-gauge and ultra-thin-gauge continuous hot-dip galvanized strip steel production line. Background technique [0002] Thin and extremely thin strips produced by continuous hot-dip galvanizing are often used to make housings for household appliances. The quality inspection and mechanical properties of the housings of household appliances have higher requirements, and the requirements for product quality are also higher than those of similar products. The requirements are relatively strict, which makes the production of thin and extremely thin strips produced by continuous hot-dip galvanizing more difficult. Improper adjustment of the skin pass machine is prone to strip breakage accidents, and the requirements for the operating skills of the production line operators are getting...

AI Technical Summary

Problems solved by technology

[0002] Thin and extremely thin strips produced by continuous hot-dip galvanizing are often used to make housings for household appliances. The quality inspection and mechanical properties of the housings of household appliances have higher requirements, and the requirements for product quality are also higher than those of similar products. The requirements are relatively strict, which makes the production of thin and extremely thin strips produced by continuous hot-dip galvanizing more difficult. Improper adjustment of the skin pass machine is prone to strip breakage accidents, which requires higher and higher operating skills for the production line operators, and the adjustment of manual intervention has a large fluctuation in the tension of the production line

[0003] The skin pass machine and the tension leveler are the single equipment with the largest tension in the continuous hot-dip galvanizing production line. Improper adjustment of the skin pass machine will cause large fluctuations in the tension of the entire line, which will have a greater impact on the continuous production line, and the impact on the equipment will reduce the life of the equipment. Entering the maintenance cycle too early is not conducive to the normal operation of the production line

[0004] The beading defect of the strip steel will affect the premature wear and damage of the roller system of the tension leveler after it is generated at the skin pass machine. The subsequent roller coating machine needs to be opened. , At the outlet shearing place, the ribbing is easy to cause steel jamming, which makes it difficult to cut the ribbing place. If the ribbing is too long, it will not be cut off in a short time. Unclear removal of defective strips will cause jamming of the coiler’s threading, and cannot be carried out accurately according to the threading procedure, which will affect the efficiency and accuracy of the strip threading. The head will affect the coil shape of the entire steel coil. Excessive ribbing will cause periodic indentations in thin gauges under high tension, and the length of product defects will increase. Generally, the indentation defects caused by strip thickness less than 0.3mm are in the More than 200 meters, the customer can only cut it during use, wasting a lot of raw materials; at the same time, the ribbing defect at the head of the strip is not cut clean, and the tension of the coiler is usually controlled by a small tension, but too low tension will cause The core collapse of thin-gauge steel coils is specifically related to the judgment of the beading degree of the strip, which is particularly important for the operator’s experience. The effect of beading on different steel types is also different, and there is a deviation in the judgment. The finished product after coiling Rolls may also produce tower-shaped rolls and be discarded directly

[0005] Therefore, ribbing defects are more harmful to the continuous hot-dip galvanizing production line of thin and ultra-thin strip steel, and it is difficult to operate in manual control mode. Too much intervention will cause many abnormal problems. The temperature of the steel is high, and improper handling of abnormalities will cause the production line to slow down or stop. The occurrence of accidents such as running off the track and breaking the belt seriously disrupted the production rhythm and brought a passive situation to the smooth production

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