Resilient device of automatic powder molding machine based on PID controller
SUN Weichao1, LU Baochun1, SUN Xiangqing1,2
(1.School of Mechatronics Engineering, Nanjing University of Science and Technology, Nanjing 210094 China; 2.Yangzhou Haili Precision Machinery Manufacturing Co., Ltd, Yangzhou 211407 China)
 

Abstract: Aiming at the resilient device of the lower punch in automatic powder molding machine, poor antipollution ability, uneasy travel adjustment and poor reliability were researched, and a new closedloop control system based on PLC as a PID controller, servo proportional valve as a pilot valve and a distance sensor was proposed. The transfer function of hydraulic cylinder and servo proportional valve were tested and the PID controller was simulated by Matlab. The results indicate that the system operates stably and reliably, with better realtime performance and has an important meaning on design of the resilient device, which can improve the quality and raise the qualified rate of products.
Key words: powder molding machine; servo proportional valve; PID controller