Hydraulic Rolling Shear Proportional Servo Control Strategy And Experimental Research Cut

As one of the world’s largest countries in steel consumption, China’s steelproduction has been growing, but its’ the production quality still has a certaingap with foreign countries, which means the steel production quality needs to bedeveloped from the rough based development model to a high-quality type andthe steel mills also have to be technical transformed to meet the demand. Themain equipment in the middle-heavy plate include rolling mill, straighteningmachine, bilateral scissors, scissors and others. The domestic innovation on therolling mill and straightening machine has completed, but the bilateral scissorsand other kinds of scissors still follow oblique blade cut in the50s’ or60s’. Inorder to change this situation, Taiyuan University of Science and Technologyhas successfully developed and marketed the full hydraulic rolling slitting shearsafter years of careful research and development. Hydraulic rolling shear iscomposed of two hydraulic cylinders as a power source for driving the cuttingedge to make approximate pure rolling shear, so that it can reduce the relativesliding between the cutting edge and the shear blade and avoid bendingphenomenon. And this pure rolling shear will be the developing trend in thefuture. Its core content is to keep the hydraulic cylinders operate in a certainposition curve to ensure the pure rolling shear operation, which also rises higherrequirements on the two hydraulic master cylinder position control system andcontrol accuracy.The control structure and control strategy of the control system in themodern rolling automation control have played a more and more important rolein the fully automation control process. Such as steel thickness, bite angle,friction, hydraulic oil elastic modulus, flow coefficient, damping ratio and othervariables. All these factors have a great influence on the shear effect, whichmeans the control strategy has a certain adaptive ability. However, the two fullhydraulic master cylinder rolling shear position control system uses PID controlalgorithm so the present system is unable to cope with the change when the loadhappens and it has to take the artificial dynamic adjustment which will affect the production efficiency.On the background of the full hydraulic rolling slitting shear designed bythe Taiyuan University of Science and Technology for a steel mill in Shaoxingcity, we firstly researched the machinery and hydraulic theory of the hydraulicslitting shear and the electro-hydraulic servo control, made the mathematicalmodels in the proportional amplifier of the control system, the proportionalservo valve, the load and detection of feedback and analyzed analysis thedynamic parameters of the system. Second, we studied and did the simulationexperiments on the traditional PID algorithm and fuzzy-PID controller. On thebasis of that, we proposed adaptive interaction PID control algorithm and madethe simulation comparison. Through the actual test on the school shopexperiment platform, the result showed that the newly adaptive interaction PIDcontrol algorithm has the certain adaptive ability and also can automaticallyadjust the parameters to meet the needs of production under some circumstances.Finally, we have the control system software based on C++and the adaptiveinteraction PID algorithm.