Determination of Residual Forces in Mechanisms Assembled by Edge-Form Rolling

Abstract

Steering and suspension systems are components that supply driving safety in vehicles. For a correct working the mechanisms of these systems consist of many ball-joints that have different functions. Generally the ball-joints are assembled to systems in press-fit without any gaps, but even with residual forces. On the other hand excessive tightness causes high moments, which requires additional processes of manufacturing. But low tightness also creates gaps in joints. None of these conditions are desired. Manufacturing a ball-race that has long-life, low-friction and provides required working angles in every road condition, can be designed after long test processes and sample productions including lots of improvements. An important element of steering systems in vehicles is suspension ball-race that can be manufactured by assembling with plastic deformation after designing the ball-joint. In this study, during the manufacturing of the suspension ball-race supplying the motion transmission, the edge-form rolling process that is a subsection of rolling process of manufacturing methods based on plastic deformation was examined. Effects of pressure forces occurring after edge-form rolling in bearing systems at different values were studied by changing operation pressure of edge form rolling by means of specific numerical simulations.

Keywords

• Plastik şekil verme, Sıvama, Sıkıştırma kuvveti, Rotil, Küresel yatak.