A new type of multi-scale and segmented control method for bars

Abstract

The invention relates to a new type of multi-scale control method for bars. The first set length is set, and the total length of the bar after passing through the finishing rolling area is calculated. Then, under the condition of the first set length, Calculate the number of bars after cutting and the length of the remaining bars after cutting, compare the length of the remaining bars with the first set multiplier length, when the length of the remaining bars is less than the first set multiplier length , adjust the first set scale length to the second set scale length. Then calculate the estimated remaining bar length after shearing on the basis of the second set multiple ruler length, compare the expected remaining bar length with the second set multiple ruler length, and determine the actual multiple ruler during shearing length. The invention reduces the amount of short lengths after shearing, effectively improves the bar yield, and reduces production accidents to improve work efficiency.

Description

technical field [0001] The invention relates to the technical field of steel rolling control, more specifically, it relates to a novel multi-scale and segmented control method for bars. Background technique [0002] The double-scale flying shear is the key equipment widely used in the bar production line. The traditional scale control method of the bar is generally to use the pulse coder to detect and pre-set the motor speed of the finished rolling mill after the rolled piece passes through the finished product stand. Determine the diameter of the finished rolling roll and calculate the pulse equivalent of the motor encoder of the finished product rack, convert it to the pulse number required for the length of the thermal scale of the rolled piece as a comparison value, and then use the PLC high-speed counter module to calculate the pulse equivalent after heating Accumulate and compare the pulse numbers of the length of the finished rolled piece on the center line of the dou...

AI Technical Summary

Problems solved by technology

However, using the exit speed of the finished product rolling mill and the hot metal detector before double-length cutting, the calculated length is cut according to the fixed-length double-length. Due to factors such as the unstable length of the incoming continuous casting slab, it often occurs that the last double-length cuts out a short tail. That is, there are only a few meters or more than ten meters, and there are often buffer sections or left in the apron to cause steel pile accidents; at the same time, because of wear defects in the roll diameter measurement, it is not possible to handle the relative slippage of the same rolled piece on the same finished frame The influence of factors such as shifting and rolling groove wear on the line speed of the finished product results in a large error in the shear control method. In the production process, there is often a phenomenon that the set length is inconsistent with the actual length of the cooling bed, and the length of the finished product on the cooling bed will also appear. The time is short, and even the length does not change after the multi-scale is corrected, which seriously restricts the yield of the product and increases the production cost, and increases the workload of picking the full-length and short-length materials caused by the large error of the multi-scale. Personnel increase the heavy labor intensity

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