About the offense. Tale

— The offense is so small and very cute little animal. In appearance it is quite harmless. And if to handle it properly, you damage it you will not. Resentment, if not try to settle in his house, lived well on the outside and never touches it. But all attempts to take over the Offense, to make her his, always ends in tears…

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Rolled metal


Before rolling of iron applied to the rolling of nonferrous metals — lead, tin, copper, coinage, alloys, etc. the earliest document (picture with description) that characterize the device for rolling of tin left by Leonardo da Vinci (1495). Until about the late 17th century, the actuator of the rolling mill was manual, in the 18th century water. The industrial rolling of iron began in the 18th century, Rolling mills were used to produce roofing iron, flattening ladle blanks in strip or sheet, of division forged bands lengthwise into smaller profiles of square or rectangular cross section.
At the end of the 18th century to drive the rolling mills began to use steam engines; rolling becomes one of the three main parts of the production cycle of metallurgical plants, gradually displacing less efficient method of forging. To this period belongs the industrial rolling mill with grooved rolls, constructed in 1783 by the Court Velikobritaniya); rolling mills gradually differenciate to crimping, sheet and varietal. In 30-40-ies of the 19th century in connection with rapid development of Railways in different countries start laminating the rails. In 1856-57 in Saarland (Germany) installed the first mill for rolling large beams. In 1867, Bedson (UK) built a continuous wire mill. In 1885 the brothers M. and R. Mannesmann (Germany) invented a method of rolling seamless pipe in rolling mill with obliquely arranged rollers. In 1886 edenborn V., and C. Morgan (USA) used high-speed wire coiler with axial feed. First, the shear (design B. Edwards) established in 1892 in the United States. In 1897 to drive rolling mills successfully applied motor (Germany). In 1906 in the city of Trinec started up a rolling mill with a reversible motor. The principle of continuous hot rolling of sheets found practical application in 1892 in the town of Teplice, where he was set to semi-continuous mill. Shirokopolosnoi the first continuous sheet mill was built in 1923 in the United States. Beginning of cold rolling sheets applies to the 80-th years of the 19 century; cold rolling of tubes developed in the 1930s in the United States.

Translated by Yandex Translate