소형뎀퍼 힌지의 신뢰성에 관한 실험적 연구

Abstract

As the progress of whole industry, products using the damper hinge are required the good operating sensitivity, high stability and realiability. This study shows the method of reliability test for the high performance damper hinge. Damping torque balance is different from operating conditions. In this work, we fabricated the damper hinge with the function of soft landing, soft opening, slow-down range and stopping at the angle of 90～100°. The test of reliability carried out with the condition of gab size between shaft and housing(0.02～0.1mm), the moving angle of door(0～90°), dewll time(3sec), free falling time(3～8sec) The main conclusions obtained in this study are as follows ; (1) In the hinge material of POM(polyoxymethlene), the machanical properties showed the good optimum conditions as a damper hinge materials. (2) As a result of the simulation of injection mold, adequite gate location was very excellent in gate point(caseⅠ) with the end point of shaft. (3) As the increase of gab between shaft and housing of damper hinge, the down time decreased. (4) In the results of reliability test of damper hinge, as the increase of perfomance cycle numbers, it showed the decrease of down falling velocity. And also, in the amplitude for velocity change, has 3 step processes. In first step, velocity amplitude for the dynamic of hinge is very high, unstable condition of hinge parts due to fabrication. In second step, it has semi-stable condition of damper hinge due to stabilization with the increase of perfomance cycle number. In third step, stable condition, no change of velocity amplitude. The reason for this is considered that the decrease of falling velocity is due to infulance of the change of temperance of silicon oil, and fabrication of hinge parts.