The Control Circuit Design And Research Of The Deep Hole Chrome Plating System

With the continuous development of modern industrial automation, plating technology applications more widely in all areas of society, explosive competition of electroplating industry encourage enterprises to improve product quality and technical level, to confront the reality that poor production quality and low technological level, how to achieve automatic control technology of electroplating which has great significance.A factory requires us to create the deep hole chrome plating control cabinet, in connection with control requirements of the electroplating product features, the system uses a distributed control system, which upper computer with configuration software WINCC and lower computer with PLC collaborative work, achieving automatic control of electroplating production line.This paper is according to chrome plating automatic control system for the study, focusing on the hardware design and analysis of control system, in accordance with control requirements of the project, through the AutoCAD electrical 2006 software designing electrical schematic diagram for the PLC terminal maps, external terminal maps and construction drawings to provide the circuit basis, for the construction of chrome plating control system to provide a hardware protection, to ensure the chrome plating control system complete successfully.In this paper, the reliability of the chrome plating control system to do a full analysis and research, from the component selection, hand, auto, hand and auto the three control modes switching, EMC design of control system and has taken a number of PLC anti-interference measures for the reliability design, to ensure reliable operation of the control system.In connection with the problem which complex chrome plating production line will inevitably occur faults, we installed fault set of controller on the control panel, it is designed to enable staff to timely discovery and resolve faults in process, to ensure that reliability and security of the control system.In addition, the paper used fuzzy fault tree analysis for control system. Caused by the control system of all possible causes of fault analysis and concluded, established the fault tree model of deep hole chrome plating control system; through qualitative analysis of the fault tree to determine the minimum cut sets; using fuzzy set theory to determine the probability of occurrence of the end events; through quantitative analysis of the fault tree to calculate the probability of top event and the importance of the end events; provided the basis for Maintenance and repair of the system.The control system has been carefully to design, installation, commissioning by our research team, put into production use and can realize automatic control of electroplating production line, to verify the feasibility of the system.