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Vacuum impregnation production line control system research and design

Author: ChenHao
Tutor: SunZuo
School: Nanjing University of Technology and Engineering
Course: Control Engineering
Keywords: Vacuum impregnation production line PLC PID Man-machine interface Automatic control
CLC: TP273
Type: Master's thesis
Year: 2012
Downloads: 10
Quote: 0
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Abstract


With the development of the foundry industry, vacuum infiltration has become an essential step of the process in the casting production, through this process, you can eliminate casting defects such as porosity, pore slag hole, and improve the sealing pressure resistance , and ultimately improve the pass rate. Vacuum infiltration process low efficiency of traditional manual work intensity, have been gradually replaced by automated equipment, the vacuum infiltration equipment control system performance is good or bad is also directly related to the cost of production of the factory, production efficiency and product quality. From an engineering perspective, the vacuum infiltration characteristics of the production line control system works proposed automatic control system based on PLC controllers. The details are as follows: 1) study the control structure of the object as well as the characteristics of the process, based on constructed based on the structure of the PLC controller system hardware and the underlying system. The input and output of the system according to the characteristics of the system's control, classification, analysis and design of the electrical circuit of the system; 2) on the basis of the traditional control method, the study manual semi-automatic control mode control characteristics and methods, combined with PLC the advantages of manual and semi-automatic control of hardware and software design methods, and proposed the solution of the system security; 3) automatic control mode is the focus of this study, different from the traditional control, automatic way to really each unit combined into one overall, form a complete intelligent automatic control system. In addition to the same manual semi-automatic control characteristics, traffic control is the key to the automatic control mode, interrupt control method by studying the action of the entire production line process. 4) In addition, the entire system for the control of the analog is a control difficulties, how to ensure that the curing temperature of the constant is a key factor of the process, the temperature deviation is too large to easily lead to the production of defective products, we study the curing tank temperature based on PID control theory control methods. 5) good control system must be a good man-machine interface, Finally the design of the human-machine interface, simple to use Mitsubishi touch screen development software, and with a number of representatives of the screen, for example, the control of the control system interface design. The system has been put into operation, the demand-side plant usage, process and technical requirements to meet the full demand side, to make a certain contribution to its in savings in production costs, improve production efficiency and product quality.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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