Parametric Optimization of Planetary Carrier Staking Groove for Durability 2019-26-0239
Planetary gears are widely used in automobile industry due to their compact design and high power density. A simple planetary gear set consists of a Sun gear, Ring gear, Planets and Carrier which houses planet gears. Planetary gears are mounted on pinion pins and the process of assembling the pinion pins onto the carrier is called staking. Pinion pins have a staking region which after assembly expands outward into staking groove on the carrier to prevent axial movement of the pins. Planetary carrier staking grooves are designed to meet pinion pin retention and stress targets.
In this study, an Isight work flow will be developed using an automated end-to-end FEA process to find out the effect of various groove design parameters on the stresses at staking groove location. Developed Isight workflow involves parametrically updating groove geometry, FE model setup, analysis and post-processing of the results. Commonly used staking groove shapes will be considered for this study. Effect of parameters like thickness of the flange, fillet radius of the groove and lateral/ longitudinal groove width on stresses will be analyzed to optimize staking groove design.
This paper presents an automated Isight based method to quickly evaluate multiple staking groove designs and identify Optimum design. Developed method can be used by Gear Designers to design Optimum Staking Groove.
KEYWORDS: Planetary carrier, Staking Groove, Isight, DOE, Parametric Optimization
Vinay Maruthi Ambarkar, Pramod Muralidhara, Yogesh Dewangan, Galina Roy
General Motors Technical Center India
Symposium on International Automotive Technology 2019