XIAO Chengjun, ZHANG Yongjun, WU Tao

 

(College of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China)

 

 

Abstract: Aiming at the problem of output splitting force unstable, large impact in processing, and low automation degree of the connecting rod fracture splitting machine tool, the machine mechanical structure and hydraulic system were introduced, then high pressure and large flow output of the hydraulic cylinder and eliminating the gap between the workpiece and fixture were studied. It′s was proposed that the pressure sensor combined with accumulator were used to optimize the control strategy of hydraulic system. Also, the connecting rod fracture process was improved. The machine tool control system included hardware system and software system, the hardware of the control system was designed based on Mitsubishi PLC, touch screen and A/D input module, and the following programs were designed: process parameters setting, realtime monitoring, automatic operation, fault alarming. The results indicate that the control system can realtime monitor hydraulic system to ensure the output of splitting force and load speed of the force, the machine works stability, and is convenient to operate.

 

Key words: connecting rod fracture splitting; PLC; control strategy; hydraulic system; automatic operation