ACHIEVEMENT OF DIMENSIONAL ACCURACY OF LENGTH VARIABLE THICKNESS STRIP AT ROLLING
https://doi.org/10.21122/1683-6065-2018-1-128-131
Abstract
It is established that the process of symmetrical rolling is accompanied by high metal pressure on the rolls, which leads to wear on their working surface. To reduce the metal pressure, the tension of the strip ends is applied. With a minimum forward tension, the deformation conditions are realized in the case of a discrepancy between the circumferential speeds of the working rolls. It is determined that the precision of products depends on the amount of advance and this must be taken into account when rolling with variable reduction. An equation for determining the instantaneous advance of the metal in the cross section of the exit from the deformation center during the rolling of profiles of variable cross section with increasing compression is presented. It has been theoretically proved that in order to reduce tool wear and to achieve the specified dimensional accuracy of the rolling profile, it is quite sufficient to roll the strip in the last pass with a minimum unit reduction of not more than 0,5 mm.
About the Authors
E. E. Petyushik
State Scientific and Production Association of Powder Metallurgy
Belarus
Minsk, Belarus, 41, Platonova str.
Belarus
Minsk, Belarus, 41, Platonova str.
A. D. Kritsky
Belarusian National Technical University
Belarus
Minsk, Belarus, 65, Nezavisimosti ave.
Belarus
Minsk, Belarus, 65, Nezavisimosti ave.
D. M. Ivanitsky
Belarusian National Technical University
Belarus
Minsk, Belarus, 65, Nezavisimosti ave.
Belarus
Minsk, Belarus, 65, Nezavisimosti ave.
References
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Review
For citations:
Petyushik E.E., Kritsky A.D., Ivanitsky D.M. ACHIEVEMENT OF DIMENSIONAL ACCURACY OF LENGTH VARIABLE THICKNESS STRIP AT ROLLING. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2018;(1):128-131. (In Russ.) https://doi.org/10.21122/1683-6065-2018-1-128-131
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