Abstract:
In automatic loading machine, the copper wires on the actuator arm involve in the process of bending and pressing. From this process, there might be an unacceptable damage on the copper wires, such as the scratches on the electrical insulation (coating) and the depletion or
permanent subsidence of the copper wires. The damage is caused by the improper design of the tool which used to bend and press the copper wires. The designing factors consist of the geometry of the tool, the material of the tool, and the speed and position of the tool as well. Therefore, in order to avoid the unwanted damage, explicit dynamics finite element is presented to analyze this process. The explicit dynamics finite element is commonly used in the analysis of complex problems such as the impact and deformation caused by the material difference between two objects. This method can show the geometric variation of the copper wires during and also after the process. Moreover, it is capable of displaying the stress distribution on the copper wires at various points in time. In this analysis, the material, speed, and position of the tool (bending head and pressing head) are varied in order to find the optimum point of the process. From the analysis, for
the bending head, the optimum point is acquired by adjusting the speed of the bending head to be 1 m/s or lower. In addition, the position of the bending head is set to be 1 mm or less above the bottom of the wire and the Polyethylene material is used. The edges of the bending head are also filled so that the copper wires are bent as desired without any damage. For the pressing head, the optimum point is reached by using the two-point pressing head at the same speed as the bending head. These results will be useful in designing and controlling the bending head and the pressing head of the automatic loading machine.