Design And Implementation Of Flame Cutting Control System For Continuous Casting Round Bille

In recent years,the iron and steel industry has developed rapidly against the background of rapid growth of supply and demand of upstream and downstream industries,and the steel output has increased year by year.The world’s mainstream billet continuous casting process not only produces excellent profiles but also has great economic advantages.The continuous casting billet produced by this process needs to be cut at a fixed length before the billet is discharged.In comprehensive consideration of the mainstream cutting method,the low-cost and high-efficiency flame cutting with hydrogen oxygen mixture is selected,A set of energy-saving and environment-friendly flame cutting control system is designed and implemented in combination with the programmable logic controller(PLC)specially designed for industrial environment,the work contents are as follows:(1)The mechanical structure of the flame cutting device is designed according to the technological process of continuous casting and the cutting requirements combined with the flame cutting principle,including the cutting car frame,the cutting gun driving device,the synchronizing device,the cutting gun(ignition gun)and the granulating water device,and the energy medium pipeline.According to the principle of producing hydrogen and oxygen by water electrolysis,the hydrogen and oxygen mixture generating device and multistage anti-backfire pipeline to ensure safety are designed.After analyzing the control requirements of the system,design the scheme and structure of the control system.(2)According to the overall structure of the control system,the hardware design is divided into the selection of PLC and supporting modules,the hardware design of the AC variable frequency drive system,hardware design of low-voltage components,the hardware design of the camera sizing device,and the hardware design of the hydrogen and oxygen mixture generation device.The PLC electric control cabinet and the energy medium control cabinet are made to lay the hardware foundation for the subsequent design.(3)TIA Portal software performs hardware and network configuration of the control system,allocation of I/O points,and program programming.Build a PROFINET communication network and use modular programming methods to design programs,including cutting gun translation,lifting,and cutting vehicle related program design.The design system has three operating modes: automatic/semi-automatic/manual,two cutting modes: flat cutting/arc simulation,and manual intervention function.It is suitable for various situations and can effectively respond to unexpected situations.Starter software is used to configure the drive system,adopt V/f control mode,and perform data optimization and debugging.(4)The human-computer interaction function of the control system is realized by the upper computer monitoring screen and the manual console.The upper computer screen is designed and produced by Win CC.The console is equipped with various manual buttons,knobs,operating levers and indicator lights for manual control of the system.(5)After the installation of the equipment,the system shall be debugged according to the steps of program simulation,hardware and software testing,and energy debugging,and the faults and potential problems in the system shall be found and handled.Test the application of the system through the hot test and analyze and summarize it.The system has achieved automatic control of flame cutting for continuous casting billets.The mechanical structure is simple and has high strength;The synchronous device is equipped with a camera to determine the length,and continuous casting is carried out simultaneously for cutting;Building real-time industrial communication networks with high-performance controllers and drivers;Multiple operating modes,cutting methods,and manual intervention functions,making it flexible to use;Hydrogen oxygen mixture is directly used for cutting,safe,reliable,and environmentally friendly.The practical application of billet production is stable,high-quality,efficient,and easy to operate,greatly improving labor productivity and bringing higher economic benefits.