OJSC “Pervouralsky Novotrubny Works”, Pervouralsk:

An. V. Serebryakov, Ph.D., Head of Department

Ural Federal University named after the First President of Russia B. N. Yeltsin, Chair of Metal Forming, Ekaterinburg, Russia:

Al. V. Serebryakov, Ph.D., Professor Assistant

S. P. Burkin, Ph.D.

G. V. Shimov, Postgraduate

E-mail (общий): spb@mtf.ustu.ru

High requirements to dimensional accuracy of section and cleanliness of processing of internal surface of pipes for fuel cladding of nuclear reactors are defined by operating conditions of reactor assemblies. Drawing on a fixed mandrel increases the radiation resistance and reduces the tendency to intercrystalline corrosion of pipes. The traditional technology of production of pipes for general application do not provide the required accuracy thin-walled pipes and do not eliminate the defects due to the longitudinal elastic vibrations of a short mandrel. Possibility of varying of frequency of self vibrations of the mechanical system for mandrel fixing allows to achieve termination of vibrations practically for all technological parameters in drawing on short mandrel. The paper describes the technological actions on increase of accuracy and quality of the inner surface of thin-walled tubes of corrosion-resistant austenitic steels processed at the finish stage by drawing on fixed mandrel. Construction of drum-type unit for transportation of pipes and mandrels in drawing on a fixed mandrel is described. Designed tooling is manufactured and tested in the production of tubes of several sizes, demonstrating the effectiveness of the stabilization process short mandrel drawing.

1. Bakanov M. V., Chuev V. V., Kryukov O. V. et al. Izv. vuzov. Yadernaya energetika – News of the Higher Schools. Nuclear Power Engineering. 2005. No. 1. pp. 139–145.

2. Parshakov S. I., Serebryakov A. V., Rozenbaum M. M. et al. Stal - Steel. 2007. No. 5. pp. 89–93.

3. Kogos A. M. Mekhanicheskoe oborudovanie volochil'nykh i lentoprokatnykh tsekhov (Mechanical Equipment of Drawing and Roll-Mill Shops). — Moscow: Metallurgizdat, 1957. — 340 p.

4. Savin G. A. Volochenie trub (Drawing of Tubes). — Moscow: Metallurgiya, 1982. — 160 p.

5. Parshin V. S., Kostrov V. P., Somov B. S. et al. Mashiny i agregaty dlya obrabotki tsvetnykh metallov i splavov (Machines and Assembly for Processing of Non-Ferrous Metals and Alloys). — Moscow: Metallurgiya, 1988. — 400 p.

6. Zinoviev A. V., Kolpashnikov A. I., Polukhin P. I. et al. Tekhnologiya obrabotki davleniem tsvetnykh metallov i splavov (Technology of Non-Ferrous Metals Forming and Alloys). — Moscow: Metallurgiya, 1992. — 512 p.

7. Ponomarev S. D., Biderman V. L., Likharev K. K. et al. Raschety na prochnost v mashinostroenii (Strength Calculations in Mechanical Engineering). — Moscow: Mashgiz, 1959. Vol. 3. — 1118 p.