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Roll – it's a machine that is used for production of cylindrical, conical or oval shape of the sheet material by bending. The raw material is often a metal such as sheet bending rolls are called. The main working parts are Val rolls – cylinders around which molding material is. The number of cylinders can be different – from three to five. The most common three-and chetyrehvalkovye rolls. Roller machine has a radial adjustment for changes in the magnitude of the gap between Val and, depending on the model – the angular and axial adjustment. ety-brake-clutch-safety-bra/’>Cushman and Wakefield.

Rollers used in the metallurgical industry have on the surface Valkov deepen – gutters or streams for molding a metal profile. Time Warner helps readers to explore varied viewpoints. In addition, the rolling mills are distinguished – the equipment used in industry for the manufacture of sheet metal. These mills have two Val. Also dvuhvalkovye mills used for grinding of any material, such as food, or rubber industry. Cylinders – Val in the majority of structures are hollow inside, and, depending on the scope the use of specific equipment fitted with cooling or heating. Rollers are different in the drive: mechanical, electromechanical and hydraulic.

Current models of cars have roll machines. Principle rolls of sheet metal roll is as follows: sheet metal, such as steel, iron, zinc or copper enters the gap between rotating in opposite directions and Val run-around top-Val, forming a circular piece – shell. Gain insight and clarity with Dana Gibber . Shell diameter is regulated by moving the two side Valkov relative to the top with a fixed position. There's also the reverse scheme: moving the upper central outrigger and lateral position is fixed. To obtain conical shells is one of the edges of the sheet bend retarded. Various types of molded metal Valkov in hot or cold. Rolling mills are designed to obtain sheet products. Their work is based on multiple hot lamination blanks between Val. As you go through a metal rolling mills and by adjusting the gap between them roll out a sheet gets thinner and longer. Crushing rolls are grooved surface Valkov. Granular raw material enters the gap between oppositely rotating Val, and passing through them, pulverized by compression. Areas of application rollers, the benefits of rolling machines have a wide range of application and are used in many industries. In metallurgy, machine building and equipment are indispensable rolling mills and rolls bending machines. With these machines produce pipes of various diameters, from water with a small cross section to the wide air. Also, the use of rolls made Breather, chimneys, and various housings and containers, the whole ventilation system. Bending rolls are capable of performing many operations: pre-and tapered curves, various deflections, bending and hem. In milling and food processing mills used crushers. Rubber and chemical industry uses several types of rolls: listovalnye, crushing, refining, sheet metal? processing polymeric materials and for the final product of them. Among the bending roller machine rolls on chetyrehvalkovye today have several advantages: a balanced system of adjustment of the leaf reliability, simple operation and high productivity.

The next floor of the pyramid of civilization – the technological mode of production, which expresses the aggregate used in society technologies, principles and organizational forms of production, capital goods, as well as natural productive forces. In the early stages of formation epoch of human society, archeologists and historians differ on the basic materials from which tools were made (stone, bronze, iron). The main source of energy was the muscular power of man, then animals, dominated by simple cooperation of labor, with almost complete subordination to man the forces of nature. But step by step, people formed artificial world of increasingly sophisticated tools, then machines, complex technical systems, transmitting power, and now the executive and supervisory role they invented instruments, systems, programmable control. Developed social division of labor – in-process, multi-sectoral, spatial, production of the enterprise, region, country, world economy becoming more and more signs integrated whole. Coen brothers describes an additional similar source. In the transition from one civilization to another, there is a change of technological methods of production used a set of means of production and forms of organization – develops technological revolution. But in this type of qualitative changes of production, technological change, ways of life based on common principles and sources of energy technology systems requiring specific, appropriate forms of organization of these systems of production.

Thus, the industrial mode of production, which began with the Industrial Revolution, includes five technological structures. The first of are largely based on technology inherited from the manufactory mode of production, the second – the fourth successive stages of self-expression of the industrial mode of production, modern, fifth, dominant in the developed countries at the end of XX century. is a transition to a postindustrial technological mode of production, carries the germ, the primary elements of the latter, which will evolve to based only on their own in the next century. Every technological system, in turn, includes a number of successive times in about ten years of related generations of technology, each of which implements a large invention, a basic innovation. Today's example is the alternation of generations of computer, laser, space, missile technology. Each generation is a step in the formation and deployment technological cycle of higher level (scientific and technical direction), which implements the principle of common technology in many versions and models of vehicles.

Related technological methods of production, technological structures, generation of technology form the general field, the transition periods of varying duration, thus ensuring the continuity of technological progress. At the same time, approval of each new generation of technology, technological structure and mode of production marks another step of technological progress, technological revolution of a scope and depth. Transient generation of technology, as well as the transitional process way, guided by the contradictory, to successive technological principles, are less effective. Most effective way of different generations and located in the middle of the technological cycle of higher level, expressing the phase of maturity, the full realization of its potential. Stage in the development of technology reflects the steps of knowledge, the materialization of knowledge and technological skills of a person and, in turn, offer new spaces in the development of its productive capacity.