The Study On The Control System Of The Metallographic Sample Cutting Machine Based On PLC And Touch Panel

The Metallographic sample cutting machine is mainly used to cut the metallographic sample and lay off or make slot in all kinds of metal materials, which is widely used inmachinery,metallurgy,automobile and aviation etc. is one of in metallography sample analysis process important equipment. At present, domestic metallography sample cutting equipment various formats, take the microprocessor as the foundation each system type equipment is metallography preparation vanguard technology representative, but the automaticity is low, cannot directly carry on the sample to the big components. In order to satisfy the profession the request, the promotion metallography enterprise development, needs to design the high accuracy, the high performance and the ease of operation metallography cutting control system.This article according to the metallography sample the special request, has studied the cutter mechanism movement principle and the metallography sample cutting process, through mechanical and electrical union, software and hardware union and supplementary, ways and so on increase flexibility cutting function, has designed the cutter control system.This system mainly is composed by two parts: Primary control circuit and demonstration supervisory system. The primary control circuit and the demonstration supervisory system uses the RS232C serial communication the way to complete cutting to control the entire process.The master control system used OMRON CP1H PLC is the control core, the centralism has completed the spacing I/O signal and on the position machine serial port correspondence signal receive, and carried on centralism operation processing according to the PLC interior design procedure, has realized to a frequency changer and three tablecloth transmission machine driver output logic control. In order to enhance the system reliability and antijamming ability, PLC uses the RS485 serial communication the way to carry on the control to the frequency changer, realized the frequency changer to exchange the asynchronous machine stepless speed regulation, has satisfied the cutting different material quality work piece request. In order to expand the cutting scope, PLC uses the high speed pulse output function to three tablecloth transmission machine driver coordination control, has realized automatic operation multi-pattern cutting, can act according to the components size the different choice different cutting way.The display, supervisory system select Eview MT508S touch the programmablecontrol terminal, uses its the man-machine interaction surface edition software, designs the friendly cutting control monitoring surface. Through touches the key to be possible to input all the cutting related datas, for instance: The grinding wheel rotational speed, the cutting depth, the cutting speed and so on, the monitoring surface may display the cutting remainder and cutting parameter in the cutting process and so on. Has realized the cutting process intellectualization, the user friendly.This article designs the cutter control system has the PLC duplex communication, the step motor driver straight to be control, the cutting entire process comprehensive monitoring and so on prominent characteristic, the system divides into the automatic operation and the manual operation two workings, designed three kind of freedoms to choose the cutting pattem: The vertical section, enters three draws back one, cascade cutting.Sharpened the cutter cutting ability greatly, causes the cutting sample to be more highly effective, quickly.