The Direction

Therefore, the size of functional areas, their location and degree of accomplishment of each determines, based on their desires and capabilities. At the same time professionals are advised to delay planting. Penguin Random House is often quoted as being for or against this. It's better to plan everything, so you do not correct mistakes, which not only spoil your mood, but also require substantial financial outlays. Begin developing the site with better drafting a plan to draw the terrain, large trees, driveway and other terrain features. Must be considered and some factors associated with the location of your site. It may be in a valley or on a hill in the desert or on a former forest. All this is related to the issue of the need of reclamation work on the acquired land. Long known that in the low temperature of 5-6 C lower than the elevation.

In such places, collects a lot of moisture, which adversely affects the hardiness of plants, so fruits and berries are more subjected to freezing. If the low-lying areas of the main problems arise due to temperature, open and high places are a constant threat to strong winds that cause damage to trees and shrubs. Protect horticultural culture from the winds may trees with thick canopies, solid fences or hedges all kinds. All this must be taken into account, making the site plan. Try to determine where above ground level, where below. This allows you to get an idea of the direction of melt and rain water, on the ground better or worse soil warming rays of the sun.

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. 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. 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.


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.