Abstract
In this study, we focused on caulking junction and strength of automobile parts which are the differential case and the ring gear. The caulking junction is a junction method utilizing the plastic deformation of metals. In this test, it was prepared fastening margin of three types of 0.1mm, 0.05mm and 0.025mm. First, performed a torsion test for measuring the torque of the miniature model of the differential case and subjected to stress analysis and contact analysis using that value. As a result, we researched the trend of friction stress in shear stress analysis and connecting surface by each fastening margin. Then, we were subjected to the same analysis in full scale model. This result was consistent with the trend of miniature models. However, the fastening margin of 0.1 mm is predicted to break from the theorem of Tresca. Therefore, it becomes possible that the material by setting the fastening margin of 0.05 mm to 0.1 mm is fixed without breaking.
