Automatización de la máquina para ensayos de energía de penetración en neumáticos tipo 2 y tipo 3 de la Metalmecánica de San Bartolo de la EPN

Abstract

This project deals with the design and implementation of an automation system for the hydraulic press used to execute the plunger resistance determination test that belongs to the EPN San Bartolo’s Tires Laboratory. It includes a theoretical study of the regulation that states the procedure of said essay in type 2 and type 3 tires, according to the correspondent Ecuadorian technical rules. On the other hand, an analysis for the mechanical and electrical systems of this machine and their condition before the automation, which was born as an immediate necessity of the institution because the operating and variable monitoring systems didn´t work efficiently, is displayed. It has been decided to conserve the sensors for measuring distance and force, which correspond to a rotational encoder and a load cell respectively, so they could be coupled to the new system. The control has been done with a Siemens S7-1200 PLC, while the operation and monitoring is executed with a basic HMI of the same brand. Aditionally, a network was installed and configured to connect the PLC with a computer in order to automatically generate a report of the last test through Excel and Autohotkey macros.