For small-sized high-speed wire rod rolling, when the exit speed of the finished product is greater than about 70m/s, the moment the tail of the rolled piece leaves the reducing and sizing machine (export frame), due to the action of various factors such as tension, the rolled piece will accelerate. This will lead to a larger coil diameter, and will also cause the tail of the wire to spit out in advance, which is detrimental to subsequent coil collection. And this phenomenon becomes more obvious as the rolling speed increases. In order to avoid this situation, the pinch roller must use the method of tail reduction, that is, before the tail of the rolled piece leaves the reducing sizing machine (export frame), the speed of the rolling piece (reducing sizing machine) is slightly reduced, and its reduction The amount is relative to the rolling speed to control the smooth spinning of the tail of the rolled piece and evenly spread circles on the cooling conveyor roller table.
Link to this article：The reason why the pinch roller adopts the tail speed reduction control function
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