The Design Of Full Continuous Rolling Process And Automation System

Now the cold strip brooadly uses in Building material, Appliance, Automobile etc. profession, Following enlargement of the product in local demand and increment export to anther country, The enlargement of demand for cold strip will have be incresing, In same time the requirement of quantity index about tolerance and platness is more and more strictly.The cold strip is made from hot strip after pickling process.The rolling craft of PangGang cold mill plant is regulation system, The pickling line and cold mill is independence.It limits yield, increses the ancillary shutdown time and expensing, lowers product qualify rate,disadvantage in future improve the quantity of product.This text introduced the craft newly arisen full continuous rolling craft internationly topped after 80 age, To combinated pickling line and cold mill.It overcome the problem that old system can not resolved, for extending the product scale and incresing product quantity provides more widely space. The development of modern automation control technique has provided technique guarantee for this newly craft.This text join together with the actual circumstance of PangGang cold mill's rolling craft,and sufficient consider the existing problem in pickling line and cold mill and bring up the craft proposal for combinats pickling line and cold mill:Pickling line:add one uncoiler in entry, full automatic welder instead of sime-automatic welder,add 0# acid trough, increses process section speed, cancel coiler in exit; add combinate loop; Cold mill:cancel coiler,add breddle for incresing entry tension, replace old roll changing system to fulfil roll changing with strip in mill, revamping main hydraulic system to increse responding time of rollgap control, add one thickness gauge meter after 4#stand ,add new pinch roll and fly shear in exit, relocate stressmeter, add carrousel coiler. Control system revamping propsal: Pickling line:add one PLC to fulfil control function of entry equipment, add new electric equipment and tranducer corresponding to mechanical,add one sever,updata network structure,updata HMI, updata control program, add new operate desk; Communication between the two line by ProfiBUS;Cold mill:add one PLC to fulfil control function of combinate loop; updata three PLC,updata control program, revamping level two system, updata level two model, revamping network structure, add new operate desk, add new electric equipment and tranducer corresponding tomechanical.The design principle: Possibly use exist equipment to reduce investment possibly shorten the shutdown time to reduce economic lose of enterprise,quickly reach the aim.