The Design And Application Research Of The Deep Hole Chrome Plating Control System Based On PLC

Deep hole chrome plating is an important process for deep hole production. The product dealt with chrome plated process, not only product performance can be vastly improved, but also greatly extend life of the product. Plating control system directly affects the successful implementation of the electroplating process and product quality. So designing a powerful, operational reliability and stable performance control system is very important in chrome plating.In this paper, deep chrome control system is designed to target. Firstly,the paper analyzed the deep-hole plating chromium process flow and control requirements. Then ,compared the now commonly used control system model.last, considered the actual production conditions,and then designed the control systems overall program. The control system is proposed based on medium-sized DCS system which composed of the configuration software WinCC and S7-300 PLC equipments; and then completed plating control system hardware and software part of the development. The PC monitoring system for the control system was developed by WinCC6.2 and PLC was developed by STEP 7 which is special software for S7-300 series PLC to develop.In order to realize an accurate control of parameters in the chrome plating process, Considering the deep hole chrome plated technological characteristics, The paper also studied long time accurate timing, realized the precise timing for a long time by second development of internal timing module on PLC, and improved the control precision of the system; moreover, the paper also studied deep chrome temperature control system , established mathematical model for the Chrome temperature system, compared the control effect of the conventional PID, integral separation PID and expert PID algorithm in chrome plated temperature control system, finally , verify expert PID algorithm is effective and feasible via the design of professional software..