Size maximization rapid cutting method for steel plate in abnormal rolling state

Abstract

The invention discloses a size maximization rapid cutting method for a steel plate in an abnormal rolling state. The method comprises the following steps that S1, the shape and direction of a camber of the abnormally rolled steel plate is judged, and whether an abnormal incoming steel plate can meet the cutting contract size or not is judged; S2, whether the camber of the abnormally rolled steel plate is a same-direction camber or a head-tail camber: when the camber of the steel plate is the same-direction camber, segmented flame cutting is adopted, and when the camber of the steel plate is the head-tail camber, flame cutting is carried out along the bending direction, before flame cutting, through angle adjustment and calculation, the effective size of the cut steel plate in the length direction and the width direction is increased, and size maximization rapid calculation of the steel plate before cutting is carried out; and S3, after size maximization rapid calculation of the steel plate, specific cutting operation of the optimized cutting technology is carried out on a cutting site. According to the method, the shape and direction of the camber of the rolled abnormal steel plate are judged firstly, the flame cutting line snapping mode is changed, the effective size in the length direction and the width direction is obviously increased by adjusting the angle along the bent side of the abnormal steel plate, and then maximum size cutting is achieved in the aspects of finished product yield, steel plate size rescue rate and contract rescue rate, and by utilizing the technology, the improvement can be achieved to a great extent.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel plate cutting, and in particular relates to a rapid cutting method for maximizing the steel plate size under abnormal rolling state. Background technique [0002] In the current heavy plate production, the flame cutting site (non-plasma cutting) is basically responsible for the finished product cutting of extra-thick plates for rolling incoming materials, abnormal plates that need to be saved in contracts, and steel plates that need to be resized. Flame cutting is a way of cutting by manually controlling the direction of the flame and using the burner to control the size of the flame. Before flame cutting, the size of the steel plate to be cut must be marked with lime powder and the roller table of the flame cutting machine must be placed. [0003] According to the existing operation and technical requirements, the operator of the fire cutting can cut the steel plate by snapping the wi...

AI Technical Summary

Problems solved by technology

If the steel plate in an abnormal state is also snapped and cut according to the conventional method, it will inevitably increase the amount of finished steel plates out of contract, and greatly reduce the low yield of finished products.

[0004]The current method of flame cutting steel plate is to cut the finished product of the online double-sided shears that cannot be cut or the margin is small and the extra-thick plate. Take the α value as the benchmark, and place the roller on the spring line for cutting (such as Figure 1 and Figure 3 ), which does not take into account the maximum cutting method of the steel plate under the abnormal state of rolling. The original flame cutting method is convenient and simple to operate, but the steel plate under the abnormal state is cut by this method and the yield is low.

[0005] The operation principle of the prior art method is relatively simple, but under abnormal conditions, the cutting yield of the steel plate according to this method is low, and the steel plate is easily cut off due to the existence of the rolling camber Too much width, resulting in insufficient width and more contract breaks

[0006]In recent years, in order to improve market competitiveness, the company has won a good reputation from users in terms of production efficiency by adopting various means of fast and accurate delivery and improving the yield of finished products It is also necessary to win strong competitiveness in terms of cost reduction, and if the production output of the rolling mill alone is used to make up for the subsequent out-of-contract volume of such steel plates, it will not only increase the cost, but also fail to meet the requirements of fast and accurate delivery. In addition, at present, the variety of user needs is complex, and there are many limit specifications, which are also at the limit for the rolling mill. Therefore, the number of steel plates in the abnormal state of the rolling process also increases. Demand for wide and thick plates

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