A method of rolling loop control for hot continuous rolling titanium plate

Abstract

The invention provides a loop control method for rolling a hot continuous rolling titanium plate. In the torque control stage, an armature current of a corresponding loop motor is calculated and output according to the following formula: , and T=B*H*delta, wherein the delta is unit tension of the titanium plate; the delta=sigma*alpha'*beta'*kstd*(1+optrimstd)*(1+Tempastd), wherein the sigma is the coefficient of tension relevant to materials of the titanium plate, the alpha' is an alloy content relevance constant of the titanium plate, the beta' is a thickness relevance constant of the titanium plate, the optrimstd is the correction coefficient of operating personnel, the Tempastd is a temperature tension correction coefficient of the titanium plate in a rack, the kstd is a rack loop tension coefficient, and the std is a number of the rack. According to the loop control method for rolling the hot continuous rolling titanium plate, when a loop is in flexible contact with the titanium plate, the impact on the titanium plate is small, tension uprush can not happen, control over loop height stability in the threading process of the titanium plate can be better achieved, and the head and the width of the titanium plate can be better controlled.

Description

technical field [0001] The invention relates to automatic control, in particular to a method for loop control of hot continuous rolling titanium plate rolling. Background technique [0002] There are many looper control methods for rolling steel in the prior art, such as patent document CN102205349A, which mentions in its background technology that the looper goes through three stages of looping, torque control, and looping in each rolling cycle. In the looping stage, the looper roll is tangent to the rolling horizontal line to facilitate smooth belt threading. After the downstream frame bites the steel, the looper is lifted upwards to form tension. After the tension reaches a predetermined value, the looping stage ends. In the torque control stage, the looper controller keeps the tension constant. In the falling stage, when the strip is about to be rolled in the continuous rolling mill, the looper rolls are lowered to the height of the rolling line before the steel is thro...

AI Technical Summary

Problems solved by technology

However, in the rolling process of hot continuous rolling titanium plate, the looper control method mentioned above cannot be used directly. This is mainly because the density and characteristics of titanium plate are different from those of steel plate. The density of titanium plate is lower than that of steel, and titanium is in It is easy to react with elements such as O, H, and N in the air at high temperature, which increases its hardness, decreases its elasticity, and increases its brittleness.

Therefore, the looper control technology of ordinary hot rolling mills is used to roll titanium plates. Due to the large unit tension and large swing of the looper, titanium plates are easily broken in the finishing rolling unit, resulting in reduced yield and surface quality.

Images