Other

Nauchno-proizvodstvennoe Obiedinenie Po Tekhnologii Mashi-nostroenia

Vladimir M Lvov

Nikolai Nikitievich Alexandrov

Genrikh S Mirzoian

Evgeny V Gerlivanov

Gleb S Akubov

Nikolai N Zorev

Viktor Gurievich Tinyakov

Viktor I Parshikov

Arkady A Zykov

Askold I Nefedov

Iosif D Gebel

Viktor Mikhailovich Krapukhin

Gennady Sergeevich Strizhov

Ivan Romanovich Kryanin

Gennady M Slepnev

By Maria Ryss, Legal Representative

Alexandr S Ryss, Deceased

Marina Y Starkina

Mendel S Klibanov

David S Shoshiashvili

Mark M Komarov

A method for positioning and rotating a workpiece shaped like a body of rotation and having a plane face, comprising the following steps: positioning the workpiece on an axial and a radial supports; transmitting the torque from a rotary driving member to the workpiece due to the forces of friction developed therebetween; and feeding ultrasonic mechanical vibrations to at least one of the supports, said vibrations being fed to any one of the supports in the direction substantially parallel to or at an angle not exceeding 10 degrees with the line of contact between the workpiece and said support. An arrangement implementing this method comprises separate axial and radial supports, the radial support being constituted by two parts spaced apart through a certain angle and having the profile, in the working portion, congruent to the cylindrical profile of the workpiece surface. The arrangement is further provided with a frictional rotary driving member contacting with the workpiece to be machined, and with an electromechanical magnetostriction converter operating within the ultrasonic range and having a waveguide rigidly connected to both converter and support, mechanical vibrations being fed thereto.

Method of positioning and rotating workpiece and arrangement

The present invention is intended for the production of long, large diameter tubular blanks (over 5 m in length and over 800 mm in diameter). According to the method, positive pressure of an inert gas is created inside a spinning mold and maintained there in the process of pouring molten metal thereinto. That provides for the equal speeds of the mold rotation and the metal movement within the mold, and thereby promotes the production of tubular blanks with a uniform structure.

Method for centrifugal casting of tubular metal blanks

Disclosed is a flux intended for use in centrifugal casting of bimetallic pipes and comprising calcium oxide, silicon oxide, boron oxide, sodium oxide and sodium fluoride, said components being contained therein in the following amounts:

Flux for use in centrifugal casting of bimetallic pipes

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Izhevsk, undefined

Vladimir M Lvov