| As a main product line, the shear line in charge of more than eighty percent of cutting work.After Rough Mill started running on december2008, the product ability of shear line cann’t flow the ability of mill line.Improve the ability of shear line become import work of Heavy Plate Mill by optimization of control function of shear line.The main equipment of shear line in5m heavy plate mill of baosteel were supplied by SMS-Demag and Siemens.lt was three segment in shear line:crop shear,trimming shera,slitting shear and diving shear, Programmable Logic Controller (PLC) is widely used In every shear,belong to siemens company production. It is the same design technique and system structure that one plate was tracked only at the same time.as a result Sequence Control Process was restricted.when the first plate occured the shear tracking area, the PLC system cann’t take over new data of next plate from L2system until the cutting of first plate was finished.the next need stop in front of the shear tracking area, it will spend long waiting time because the long distance between two palates, so the cutting effect is slowly.This paper mainly bring forward ameliorate propose according of Sequence Control Process Analysis of Shear Line.in order to exert equipment capability effectively and improve throughput in shear line.the develop language of the plc system of shear line used CFC language based on full power PCS7software. We optimized function of tracking and Sequence Control from measure of UST to marking in shear line. The main way including roller table grouping、two plate tracking、dynamic data setup、serial Sequence Control change to parallel Sequence Control.after PLC system function optimization,marking can parallel with cutting in crop shear, centering can parallel with cutting in trimming shera,slitting shear and diving shear, centering can parallel with cutting in diving shear, the ability and effect of shear line improved. |
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