Offer two method of cutting large sheets of foam. Nichrome filament is suspended vertically (Fig. 1) or stretched horizontally to the table surface (Fig. 2). Adjusting in the first case, the distance from the filament to a movable guide area and the second the height and angle of the thread relative to the surface of the table, it is possible to obtain blanks of all shapes and sizes. The expansion of the filament during heating is selected with the cargo.
Who ever cut on a lathe a series of identical parts of complex shape, he knows how difficult it is to do the same in their configuration. In the secondary school № 2 of Donetsk city under the guidance of the teacher labor B. F. Otchenashenko for such purposes, the children developed a cutter, the Read more…
Cut the ribbon at the ceremonial opening of the Central exhibition NTTM-80 at ENEA USSR — a kind of finish of the third, final stage of all-Union review of scientific and technical creativity of youth, which was dedicated to the 110th anniversary of Lenin’s birth. In the halls of 20 thousand exhibits in the country — 20 million boys and girls, young innovators, making a creative contribution to the acceleration of scientific and technical progress. During the four years of the tenth five year plan participants NTTM various sectors of the economy developed more than 4 million rationalization proposals, inventions, giving a saving of over RUB 5 billion.
Any is, perhaps, too, but the hole in the tree Ø 20-55 mm this tool to drill. Drill-Perca consists of a Central rod of square section and two blades, pivotally attached to the rod. Sami knives carved from overage mills.
Reground the blade plane for beginners is sheer torture. Not so just manually set the correct angle between the sand around and a piece of iron and withstand this angle throughout the sharpening process. Vladimir Voskresenskiy made for such cases a simple device for sharpening. To the T-shaped rack he welded the bushing and installed Read more…
When the device watering system for garden plot or in the garden many problems arise when it is necessary to bend a metal tube. Meanwhile. not that hard to assemble a simple machine (see picture) for flexible aluminium, copper and thinwalled steel tubes with an outer diameter of 20 mm.
Before bending the steel pipe, it is necessary to fill calcined, sifted through a fine mesh sand, and the ends to drown out the wooden plugs. In the circle of carting the Moscow Palace of pioneers and pupils named after N. K. Krupskaya children very often had to bend the pipes for frames of go Read more…
We offer you a simplified method of manufacturing a cylindrical gear rack. It can be done with a conventional tap, picking up the thread profile in accordance with your existing gear. Before working make a simple mandrel is a steel bar with a hole, which is inserted into the tap. The tap should be to Read more…
It’s mind typically “ship” device is intended for other, ground targets, Kuibyshev innovator N. Gerasimov developed it to help those who are engaged in the repair of automobile engines.
Offer homebrew. engaged in the manufacture or have manufactured furniture with doors mounted on piano hinges to replace them on domestic furniture, because the presence of piano hinges, even on well made furniture clearly indicates its self-made origin is unsightly.