Modal And Fatigue Analysis For The Key Parts Of The Working Device In Oblique Loading&Unloading System

As a kind of board that equipped in electrical parts, PCB has currently been widelyused in the following industries, as common consumption electronics, communication,medical and aviation, even in military industry. The processing from producing to puttinginto use for PCB involves a rather long industry chain, covering the technologies from thefollowing fields, such as mechanical, electrical, chemical, controlling and computer.Therefore, the producing quality of acid-washing, etching and board-moving for PCBplays a decisive role to the follow-up development, and also makes a difference to theperformance stability of PCB in use. In this paper, the research is focused on themechanical properties of the working device of the loading&unloading system in PCBwet-processing, by using mechanical vibration theory, FEM and fatigue theory. Bysimulation with software, the expense of test to the prototype that the company paid couldbe saved, decreasing the research cost of the machine.In this paper, the solid model of working device is created with Pro/E, and its workingprinciple is analyzed. Based on FEM and mechanical vibration, the natural frequency ofthe beam, which is used to equip nozzle parts, on flipping frame is calculated in theory.The simulation value of the natural frequency, the modes and the modal stress distributionare obtained, with the analysis of ANSYS Workbench, and the comparison is madebetween the calculated value and the simulated value. With the full life fatigue analysis,based on the Fatigue Analysis Platform of Statics Analysis in ANSYS Workbench, thefatigue analysis is processed to the key parts, as rocker and link in working device.In this research, the FEM of mechanical vibration is applied to the key part, beam, andits natural frequency and natural modes are obtained. In low frequency, the error betweenthe calculated value and simulated value is within10%, becoming the theoretical basis ofinstallation and isolation. The fatigue analysis of rocker and link is made, based on theirmodal analysis results, as well as the comparison with the damage in actual working conditions, that the simulated results of fatigue could be used as the basis of optimal designfor parts is certified, and it is correct, also, it can establish the foundation for improving thedesign of the machine.