The invention provides a rolling pacing-improving
load distribution method of a reversible single-rack four-roller rough
rolling mill. The method comprises the following steps that a single grade of steel is stratified according to the width of plate blanks and total rolling passes of rough rolling, rough rolling setting and calculation parameters are stored, and a rough rolling load distributionmodel is established; the amplitude limiting value of a threading speed of each rough rolling pass is set according to rough rolling passes, wherein the amplitude limiting value of the threading speedof the
first pass is 2.5m / s, the amplitude limiting value of the threading speed of the last pass is 4.5m / s, and the difference between the amplitude limiting values of the threading speeds of everytwo adjacent passes is not more than 1m / s; a grade of steel to be treated is provided, data of the rough rolling
load distribution model are combined, and the threading speed and the amplitude limiting value of a
rolling speed of the single grade of the steel are adjusted so as to satisfy the requirement that when the
rolling speed of the steel of the grade is lower than the amplitude limiting value of the threading speed, the threading speed is kept consistent with the
rolling speed, when the rolling speed of the steel of the grade is higher than the amplitude limiting value of the threadingspeed, the threading speed is set to be the amplitude limiting value, and meanwhile, when a current of a rough rolling motor is not overloaded, and the rough
rolling mill does not slip, the actual rolling speed of the
single pass reaches the maximum rolling speed.