Abstract
Horizontal force during unsteady rolling is considered with its calculation for 4-high rolling stands when rolling torques and rolling stands geometrical characteristics are known. Phenomenon of appearance of horizontal forces applied to work rolls preceding appearance of all other basic loads in sheet rolling mill stands and their main drive lines was theoretically and experimentally proved for different rolling mill stands.
Highlights
Main attention is given to dynamic and static rolling torques in methods of detailed theoretical stress calculations of main drive lines and scrutinize of dynamic loads in different rolling stands [1,2,3,4,5,6]
* Corresponding author: artiukh@mail.ru on Figure 1. It is done for case when forces are moved to the central point of bottom work roll (BWR) and Fhor. d BWR acts from neutral section plane (NSP)
Relations between horizontal forces, dynamic rolling torques and design of rolling stands are shown for 4-hi rolling stands
Summary
Main attention is given to dynamic (unsteady) and static (steady) rolling torques in methods of detailed theoretical stress calculations of main drive lines and scrutinize of dynamic loads in different rolling stands [1,2,3,4,5,6]. Reasons of numerous accidental breakdowns of details of main drive lines are believed to be high values of dynamic rolling torques [3,7,8]. In modern practice of protection of metallurgical machines from breakdowns it is priority to protect equipment from high values of dynamic rolling torques but question of reduction of horizontal forces during rolling is rarely considered. Main aim of this paper are: x definition of relation between horizontal forces Fhor. Main aim of this paper are: x definition of relation between horizontal forces Fhor. d and dynamic rolling torques Td for thick and thin strip 4-hi rolling stands; x prove that Fhor. d and impacts of work roll (WR) chocks against housings arise earlier than Td that states necessity to analyze Fhor. d especially during unsteady rolling
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