The pre-finishing mill is an important piece of equipment in a steel rolling production line, located before the finishing mill group. Through single-line, tension-free and twist-free rolling, it provides the finishing mill group with rolled pieces with high shape and dimensional accuracy, and is a key link in controlling the dimensional accuracy of finished products. It can reduce the cross-section of the rolled pieces produced by the rolling mill group, and provide the finishing mill group with intermediate materials required for rolling finished wire rods, which have the correct cross-sectional shape, precise dimensions, uniform cross-sectional dimensions along the entire length, and no internal or surface defects.

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