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淬火机控制系统设计.pdf

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淬火机控制系统设计.pdf

23 2 Vol.23 No.2 2009 4 Refrigeration and Air Conditioning Apr. 2009.102105 1671-6612 2009 02-102-04 PLC OMORON I/O , PLC TM273 B Systemic Design for Quenching Machine Controller Zhang Shisheng Zhang Dongmei Zibo Vocational Institute Zibo 255000 Abstract Quench is the technology that a metal work piece heated to propriety temperature for a while is being put into quenching medium suddenly. Quench can improve the rigidity and abrasion resistance of metal. Making use of PLC to control quenching process, the quenching has simple technology, cheap price, stable function and convenient operation. This quenching system constitutes heating system, quenching liquid cycle system, hydraulic pressure system and electric control system. The quenching machine control system introduced in this thesis have three control mode manual-control, auto-control and try-piece designed utilized OMRON PLC. This system can rise and fall worktable, clamp and relax work piece, sway forward and backwards, control highness by approach-switch, control time by outer-timer, produce many kinds of auto-spring plate, meet the requirement of auto-spring plate nowadays. It is presented in this thesis detailed control-demand, element list for electric control, I/O distribute list, control LAD and three improved measure for system soft and hardware in the end. Keywords PLC Quenching machine Electromagnetic valve LAD 0