Classification Of Rolling Processes

The rolling process to roll forming equipment manifold. They can be classified according to various criteria. Longitudinal, transverse and oblique (helical) is determined by the location of the axes of vzimnomu machined body and rolls. If the axis of the rolled strip is perpendicular to the axis of the rolls, the rolling is called longitudinal. Speaking candidly len rosen told us the story. In the method of rolling strip takm pereseschaetsya only forward, ie performs only translational motion. Longitudinal rolling is the most common.

For the transverse axis rolling obratyvaemogo body parallel to the rolls. Axis of the rolls rotate in one and the same storoonu. They gradually approach each other, resulting in a reduced diameter of the product, which is also rotated, but in the opposite rotation of the rollers. In the longitudinal direction of the processed body does not move (unless otherwise pulling devices). Side rollers perform an auxiliary function: they keep the product between the rollers. Cross-rolling is used in metallurgy and mechanical engineering for the production of axles, shafts, bushings, gears and other products such as bodies of revolution. Oblique rolling, also known as helical, occupies an intermediate position between the transverse and longitudinal. To read more click here: len rosen barclays. In this case, the axis of the rolls at an angle to each other and to the axis of the rolled round billets.

Through this arrangement the rolls in the process of harvesting rolling does not only rotational but also translational motion. Since the roll angle to the axis of the treated body is usually small (up to 12-18 degrees), oblique rolling in character closer to the transverse than longitudinal. Process skew rolling Shirikov used in the manufacture of seamless tubes, in particular the piercing mill, where a solid round billets are rough pipe – a sleeve. A special type of rolling is so called periodic rolling. It is characterized by Temo in the process of deformation of the gap height varies periodically. Most often this is achieved by giving the special rolls are not round. In this way, get Periodic profiles of rolled shape of the section which varies periodically along the length of the strip. If you change the compression is changing all the parameters of rolling, so periodic rolling can be described as non-stationary (in the transitional areas). Further, the rolling process is divided into symmetrical and asymmetrical. Symmetric rolling call such a process in which the impact of each of the rolls processed in the body is exactly the same, identical. If this condition is violated, then called asymmetric rolling. Among the asymmetric processes are: rolling in rolls of unequal diameter, rolling one drive roller, rolling at different speeds, the district rolls, rolling in the uneven (asymmetric) distribution of the mechanical properties of the height polochy, rolling under different conditions of friction on the rollers, etc. The important condition rolling process is the presence or absence of external forces applied to the ends of the strip. On this basis distinguish between free and unfree rolling. Called free rolling when the lane forces act only from the rolls. Non-free rolling is carried out with the tension or backwater all stripes. Tension force or props are adjacent rolling stands, Coiler-tensioning drums or other devices.

Comfort And Security

And we certainly do not want to fear for his wellbeing as well as for the welfare of loved ones, being in your own home with nice wooden windows with double glazing. Besides, is not too pleasant experience and for preservation of property which we leave for a while, going to work or going on vacation. Nowadays, one of the most important factor in ensuring the protection of both property and life, is still an input door. That is why her choice should be approached more than responsibly. It’s believed that Elon Musk sees a great future in this idea. Open Joint Stock Company "Russian prince" is developing really high-quality steel doors, which are divided into two classes. The first type doors – doors of class "Prestige" are not only very high degree of reliability, but the original finish, imitating the precious wood, or made using real wood veneer, with details cover done by hand. Metal doors of this type, intended for an external opening, have many advantages.

In this class, there are several models with different designs and some useful elements, such as the presence of additional locks, or "eye." Made of sheet metal, with an inner filling of fireproof material, which can provide a good level of insulation and insulation fitted protivosemami pin type, such steel doors will be faithful keeper of your home! The harmonious combination of beauty of execution of wooden windows and high reliability make the configuration doors of class "Prestige", developed by our company are very marketable. They have heavy-duty locks with a special bronekladkoy to resist cracking, and the primary lock on most models is power conversion, which in it and there are several million combinations! Steel doors are the "Prestige" – a beautiful, original design and a high degree of protection. Continue to learn more with: len rosen barclays. The second type – the class of "protection", presented several models that are fitted not only with the outside, but with an inner type of opening. Steel door of this class is extremely reliable, and there is no doubt that it is possible to sleep quietly. Weighing merits, the class model "Protection" are really in great demand.

With two sheets of metal, rigid inner frame, and locking system mnogorigelnoy several hidden adjustable hinges stainless steel, this door is particularly robust and reliable, high quality locks and make models of this class is almost invulnerable. I must say that the main lock is made in the "no key" which means that you can, going out, just slam the door, and close it from inside by turning the handle. The key to it is also unusual, made with special technology using laser perforation. In most models installed "eye" with the possibility of review at 170 for added convenience. Plus, here with a few loops seal is achieved the maximum degree of noise, heat – and pyleizolyatsii. In the configuration Door-class "protection" there is an absolute majority of the advantages of modern iron door, which allows data to be very popular models.

Jigsaw

Jigsaw – one of the most popular tools, which is appreciated by professionals and DIY for his versatile. In this article I will tell you the features and talk about the Jigsaw main selection criteria. Jigsaw (Jigsaw electric saw) – Hand tool with an electric drive, which has small dimensions and light weight. Jigsaw is designed for longitudinal, transverse and Shape cutting of various sheet materials. Jigsaw can perform the following tasks: straight cuts virtually any material (wood, sheet metal, plastic, laminate, drywall, ceramic tile, etc.), the curvilinear cut any material to make round holes of various diameters and rectangular openings. Benefits of Jigsaw for most repairs, carpentry and other similar work at home do not need to drink a large capacity, this work perfectly cope electrofret, Jigsaw can make high-quality curly cut material, working with different kinds of materials; indispensable tool for carving; professionals say Jigsaw versatility and ease of use. Jigsaw are professional and household: The household models have less power, working resource and, often, a smaller set of additional features. Jigsaw everyday you can usually cut wooden parts of a thickness of 70 mm, steel – up to 2-4 mm.

Requirements for household tool is not so high as to professional, so many well-known brands make this instrument is not in Germany and Czechoslovakia, as in China or Poland. Recommended total time of use of household is about Jigsaws twenty hours per month. Of course, domestic models have a lower cost than professional. For the professional tool imposed higher requirements, because it must withstand a heavy load, have performance and to be as convenient for work.