The Research Of Electro-Hydraulic Proportional Force Control Of Anode Plate Vertical Casting Device

Machinery, especially, lead electrolysis Non-ferrous Metallurgy industry needs higher and higher control accuracy in manufacturing equipments by accompanying the development of the science and technology. During the process of lead electrolysis manufacturing equipment, the anode plate vertical casting system is a producing device which aims to complete the casting of the anode plate, delivery the turnover plate and so on. However, complex structure and lower efficiency of the domestic anode plate manufacturing equipment are the common short comings which exist currently. Therefore, this study cites for anode plate manufacturing system.This paper first introduces the development of electro-hydraulic proportional force control technology, the advantages and disadvantages and the current development at home and abroad. According to the production requirement, the parameters of cooling system are calculated. The stress-strain is analyzed based on finite element method while it’s working. Mold casting system will be at a high temperature in the work process. So it also needs the thermal analysis. The three dimensional structure is designed in Solidworks based on a comprehensive analysis of the mechanical structure of the mold, and then the final design scheme is determined.In the process of die casting, the size of the mold clamping force must be strictly controlled. The hydraulic transmission part is designed through the analysis of the technological requirements. The hydraulic system uses a proportional pressure reducing valve to precisely control the size of the outlet pressure in the hydraulic control system, which is the base of establishing the transfer function of the hydraulic control system and analyzing the system performance.Hydraulic system will show the non-linearity inevitably, so this paper mainly analyzes the conventional PID control, the basic principles of simple fuzzy control and their own characteristics, and find its own limitations through simulation analysis. The final decision is to unify them together, use the fuzzy gain self-tuning PID control strategy, which combine fuzzy inference language with the traditional PID control to solve the problem of force control accuracy. Fuzzy gain self-tuning PID control system simulation indicated that the system has better control performance, which can accurately control the clamping force and has certain anti-interference as well as meet the demand of vertical die casting system. A better power control performance can be achieved.In order to test the design of the hydraulic system and the choice of the control strategy is appropriate or not, a force control system which based on the lifting platform is being built. At present, the design and selection of the hydraulic power for the force control system, the design of control valve speed and the signal input and output portion have all been completed. The next stage is to carry out the experimental work to verify the effectiveness of the control strategy.