| 초록 |
An integrated drive axle, which consists of constant velocity joint components and hub bearing, transmits the high torque and the power of a high-performance vehicle to the wheels. Constant velocity joint components are assembled inside the flange, and the hub bearing is assembled outside the flange. The end part of the flange is deformed by an orbital forming to prevent the disassembly of the hub bearing from the flange. In addition, the orbital forming on the flange provides pre-stress to the hub bearing. However, the orbital forming method could deform the constant velocity joint track, and degrade the roundness of the hub bearing inner track. Constant velocity joint track deformation and the degradation of the roundness of the hub bearing inner track by orbital forming were observed by an experimental evaluation in the past, but the testing cost so much. To save on testing cost, it is evaluated by using a numerical method. Therefore, this study investigated the design factors of orbital forming affecting the roundness of the hub bearing inner track and the pitch circle diameter deformation of the constant velocity joint track by three-dimensional finite element analysis. Likewise, the reliability of the finite element model is verified by comparison with actual test results. As a result of the verification, the error is about 10 % in comparison between the analysis and test results. Furthermore, the main effect analysis related to design factors, such as flange taper, flange thickness, and spacer round, shows that the flange thickness of the end part affects the roundness of the hub bearing inner track and the pitch circle diameter deformation of the constant velocity joint track. |
