Abstract. Automatic tool changer (ATC) device is an essential part in CNC Machining centers, which can make the machining centers smoothly running using the tool magazine and automatic tool changer control system. In order to reduce the non-cutting during work, improve productivity and reduce production costs, machinery part and control system of ATC are designed based on the disk tool magazine and tool change process of machinery arm. In this system, PLC is used as brain to magazine the tool moving, automatic tool selection, cutter spindle sleeve rollover and exchanging control. Results show that the designed automatic tool changer device and control system have the characteristic of stable performance, precise control, simple operation, and convenient monitoring. From the view of industrial applications, this system has well practical value.
Abstract. The electronic key is widely used in our life due to its small volume, tempting color, beautiful shape and easily portability. In order to shorten the design cycle and reduce the test cost of mold for the shells of electronic key, the work should be done firstly to analyze the injection technique. The electronic key shell is analyzed by using Finite Element Method (FEM) to judge reliability of the structure. Static structural and explicit dynamics analysis are conducted. The results provide valuable reference for the structural optimization design. Injection moulding process of the shell is simulated by applying Moldflow. Results show that the shrinkage is too small, the average value 0.12 mm and maximum value 0.497mm, to neglect the negative effect on forming parts after the injection. Furthermore, the designed mold structure was reasonable, which meet the demand of injection practically.
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