Rod double-length flying shear control method and device

Abstract

The invention discloses a rod double-length flying shear control method and device. The control method comprises the steps of parameter selection, finished product rack steel content signal acquisition, light curtain signal acquisition and flying shear shearing control. The device comprises a finished product rack, a double-length flying shear, an encoder and a control device, wherein the finished product rack is provided with a frequency converter electrically connected with a main shaft motor, the encoder is coaxially and rotationally connected with a finished product rack main shaft or the main shaft motor, the control device is in signal connection with the frequency converter, the double-length flying shear and the encoder, the rear end of the double-length flying shear is further provided with a light curtain sensor corresponding to a rod path, and the light curtain sensor is in signal connection with the control device. The rod double-length flying shear control method and device have the advantages that since the control device is in signal connection with the frequency converter, the encoder and the light curtain, current values are used for replacing the traditional pre-shearing thermal inspection signals for judging the state of the rod; since a double-length flying shear afterheat metal detector is changed to be the light curtain sensor, the problems of no shearing, shearing negligence and double length error caused by poor double-length flying shear signals are solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical automation, and in particular relates to a control method and a device for double-length bar flying shears with simple structure, stable and reliable operation, low maintenance cost and low energy consumption. Background technique [0002] The double-scale flying shear is used for the double-scale cutting of rolled steel bar products. It is the throat of the bar production line and is very closely integrated with the bar production process. has a vital impact. At present, the hot-rolled bar process adopts the new technology of water-piercing rolling, so that the double-foot flying shear is in the harsh environment of the metallurgical production line with large dust and water vapor, so the failure rate is high. The main reasons are as follows: First, there is no detection signal, the flying shear does not cut; the second is that the detection signal arrives early or late, and the length of ...

AI Technical Summary

Problems solved by technology

Due to the harsh environment of the production line and the large amount of dust, the observation window of the hot metal detector is polluted and blocked. Especially after the promotion and application of the water-through cooling process, water mist is diffused from the finished product rack to the double-scale flying shear area in the middle and night shift, and even occurs when the cooling section is severely worn. The cooling water is poured backwards, and the hot metal detector is always on. The detection signal is not good, resulting in non-cutting, missed cutting and wrong cutting problems. It is difficult to meet the high reliability requirements of the bar production line with harsh working conditions, which directly affects the The safety of personnel and equipment and the smooth progress of production

Images