Automatización y Estudio de Optimización del Rascador de Recuperación MIAG de la Unión Cementera Nacional Planta Chimborazo.

Abstract

It was carried out the automation and optimization study of the limestone reclaimer machine in the pre-homogenization storage, called Scraper, to the Unión Cementera Nacional Planta Cemento Chimborazo. It was carried out a diagnostic of the conditions and operating mode of the mechanical, electronic and hydraulic systems of the machine; and then the automatization process to make adjustments and necessary tests proving the poperly system working. The Software control was carried out through three programming tools and parameterization: STEP 7 for the PLC S7-300 Programmable Logic Control, WinCC Flexible 2008, for a graphic interface creation of the Touch Operator Panel and the parameterization software of the Simocode maneuvering unit, called SIMOCODE ES. For the Hardware control, was necessary to use the Programmable Logic Control (PLC) with digital input and output modules allowing getting signals from sensors, switchboards, etc. For the handling actuators was used protective motors, simocodes, contactors, auxiliary contacts, relays, etc., enabling the machine actuator and electro-valves. The industrial communication linked with the system is Profibus DP and Profinet, thanks to the Communication Process CP. The software and hardware system are attached in order to get an automatic control of the machines, through sensor network and the programming are required to comply with the autonomous motions. The Overall Equipment Effectiveness study (OEE) developed gave results that demonstrated the automatization helped to improve the machine effectiveness in 25%. It is concluded to minimize the stops due to the system failures, improving the availability and the performance. It is recommended to use the operator’s manual, electric plans, working explanatory notes and the machine calibration parameters.