The first-time successful use of the flying and shearing platform of the tantalum acid rolling line

Gu Bingfei, the equipment inspector of the equipment department of the cold rolling mill of Handan Iron and Steel Co., Ltd., obtained the national invention patent for the acid-rolling line flying shear repair platform. The first successful use of the acid rolling line in the annual repair of the “May 1st” was successful: the flying shear inspection mode broke through. The "technical bottleneck" monopolized by the foreign party, the cutting blade replacement and adjustment have become relatively simple general operations by the risky and difficult to master "high difficulty movement", which not only saves time and effort, but also has high reliability and annual innovation. The effect is about 1.4 million yuan.
Flying shears is one of the key equipments for the pickling and cold rolling combined production line. It undertakes the task of cutting the strips online so that the products can be reeled. Whether the flying shears can operate normally determines whether the capacity of the entire production line can function normally. . It is precisely because of its importance and the confidentiality of foreign technology that the flying shear is one of the few single equipments that are completely supported by the foreign party. The weak link of the flying shear is the cutting edge. Since the cutting edge is arranged in an arc on the drum, when the strip is sheared, the shearing starts from the middle, and then the two sides of the symmetry enter the occlusion in turn, and the initial setting of the cutting edge gap Only 0.03 mm, so how to accurately find the position of the occlusal point and make measurements when changing the cutting edge becomes the key to the cutting edge adjustment.
The flying shear inspection platform and the matching cutting edge adjustment process invented by Gu Bingfei overcome the inherent defects of a large steel mill in Germany to adjust the cutting edge method. First, the position of the bite point can be controlled very conveniently and accurately, and the length along the cutting edge can be realized. The measurement of the direction; the second is to eliminate the influence of the gear gap of the upper and lower drums on the cutting edge clearance; the third is that the cutting edge is easy to control when changing and adjusting, thereby effectively avoiding the interference damage of the upper and lower cutting edges; Effectively reduce labor intensity, improve work efficiency, and shorten maintenance time.

CPE 135A

Chlorinated polyethylene is a saturated polymer material with a white powder appearance. It is non-toxic and tasteless. It has excellent weather resistance, ozone resistance, chemical resistance and aging resistance. It has good oil resistance, flame retardancy and coloring properties. It is an excellent impact modifier for PVC plastics and a synthetic rubber with good comprehensive performance. It has a very wide range of applications and has been widely used in cables, wires, hoses, tapes, rubber and plastic products, sealing materials, flame retardant transport belt , Waterproof coiled material, film and various profiles and other products.

As a PVC impact modifier, CPE135A has many advantages such as low price, excellent performance, and excellent aging resistance, but it has certain disadvantages in the use of high impact and high hardness products and low temperature resistant products CPE135A. For example, in the formulation of rigid PVC, a large amount of CPE will reduce the hardness and rigidity, which reduces the physical properties of the product; in addition, when the low temperature resistance requirement of PVC products exceeds minus 30°C, CPE135A cannot meet the requirements. Under normal circumstances, modified CPE, such as ACM, RGC135A, etc., can be selected for rigidity and hardness improvement; for low-temperature resistance modification, impact-resistant ACR or other impact modifiers with lower glass transition temperature can be selected.

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