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Analytical investigations of workloads of the RUP «BMZ» mill 320 working stands at rolling of fittings of slugs with section 140´140 mm using the system of minimum tension are carried out.

The trial approbation of the various technological circuits rolling-draged, has shown, that most efficient in conditions of rolling laboratory of Institute of black metallurgy is the technological circuit calibring of tapes with use of a priciple of constant width in a combination to transitions in vertical rolls for prevention current of metal in backlashes of calibre and formation lateral salvage.

There is developed the program of calculation of the endless sorted rolling parameters, which is easy adapted for analysis of rolling conditions at section mills of different types with different design-structured composition of the main technological equipment In the mathematical model of the process of the endless sorted rolling, put into basis of this program, there is taken into account more strongly the changing of the temperature field of breakdown bar along the length of the mill and its influence on changing of the stress liquidity in the mill cages and in its intercage spaces.

There are examined the peculiarities of the process of spiral winding for production of steel piston rings at using of new constructions of spiral-winding mashine-tools, working on one-thrust and two-thrust schemas of winding.