Cutting method and device for wide and thick casting blank

Abstract

The invention relates to a cutting method and device for a wide and thick casting blank. The cutting method comprises the steps that a first laser range finder is controlled to monitor the position of a cutting gun of a first flame cutter in real time, and when the cutting gun of the first flame cutter reaches a first initial cutting point, the first flame cutter is controlled to walk with the wide and thick casting blank in parallel at the same speed; the cutting gun of the first flame cutter is controlled to conduct oxygen starting cutting; whether the position of the cutting gun of the first flame cutter is at a preset roller position or not is judged; if yes, whether the cutting gun of the first flame cutter completes cutting or not is judged; if yes, the cutting gun of the first flame cutter is controlled to conduct oxygen stopping, the first flame cutter returns to a preset first flame cutter position, and the wide and thick casting blank with the length of L1 is obtained; if not, the preset oxygen stopping time of the cutting gun of the first flame cutter is controlled, the step returns to the oxygen starting cutting step of the cutting gun of the first flame cutter, and the wide and thick casting blank is recut. According to the method, accurate measuring on the walking distance of the cutting gun of the first flame cutter is achieved, and it is guaranteed that the cutting gun of the first flame cutter accurately conducts rolling cutting.

Description

technical field [0001] The invention relates to the technical field of billet cutting, in particular to a method and device for cutting wide and thick billets. Background technique [0002] In the field of steelmaking technology, the continuous casting machine system generally includes a continuous casting machine and a fire cutter. The continuous casting machine produces a wide and thick billet, and the fire cutter cuts the wide and thick billet into required lengths. The continuous casting machine system has advanced equipment and a high degree of automation, and the cutting control and production of the billet are relatively complicated. Automatic cutting is usually used in the continuous casting production line. During the cutting process, the fire cutter needs to travel to the cutting position of the wide and thick billet for cutting. Therefore, it is necessary to measure the traveling distance of the torch cutter to determine whether the cutting torch on the torch cut...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, one rotation of the encoder during the counting of the fire cutter is an increment of 500 pulses. If the encoder rotation shaft is not fastened (for example, the rotation shaft is loose) or the fire cutter returns to its original position The bounce back of the rear collision baffle will affect the accurate counting of the encoder, and then affect the cutting error caused by the calculation of the distance traveled by the fire cutter

Moreover, the ambient temperature on site reaches 70 to 80 degrees, and the body temperature of the torch cutter is also as high as 50 to 60 degrees. Long-term baking will shorten the life of detection components such as encoders or proximity switches, and damage to electronic components will cause the torch to walk. The distance count is inaccurate, and the torch cutting machine cannot accurately measure the actual walking distance, which may easily cause the cutting torch to fail to cut normally, or even cut the rollers by mistake, which affects the normal cutting of the slab and the production of the slab, and eventually leads to the failure of the continuous casting machine. Decrease drawing speed or stop pouring when laying billet

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