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Joint Mechanism and Prediction of Strength for a Radial Knurling Connection of Assembled Camshaft Using a Subsequent Modeling Approach
Journal Article
03-11-03-0020
ISSN: 1946-3936, e-ISSN: 1946-3944
Sector:
Topic:
Citation:
Zhang, P., Kou, S., Li, C., and Kou, Z., "Joint Mechanism and Prediction of Strength for a Radial Knurling Connection of Assembled Camshaft Using a Subsequent Modeling Approach," SAE Int. J. Engines 11(3):301-310, 2018, https://doi.org/10.4271/03-11-03-0020.
Language:
English
Abstract:
Knurling joint applied in assembled camshaft has developed rapidly in recent
years, which have exhibited great advantages against conventional joint methods
in the aspects of automation, joint precision, thermal damage, noise, and near
net shape forming. Both quality of assembly process and joint strength are the
key requirements for manufacturing a reliable assembled camshaft. In this
article, a finite element predictive approach including three subsequent models
(knurling, press-fit and torsion strength) has been established. Johnson-Cook
material model has been used to simulate the severe plastic deformation of the
material. The residual stress field calculated from the knurling process was
transferred as initial condition to the press-fit model to predict the press-fit
load. The predicted press-fit load, torque strength and displacement of cam
profile before failure were calculated. The torque strength of the joint was
twice higher than that of a typical passenger vehicle requirement. The torque
strength was significantly positive correlated to the press-fit load. Taking the
knurling tool dimensions and feed amount as variables, the relationships between
them and press-fit as well as joint strength were studied. The predicted
press-fit and joining strength using the subsequent modeling ware validated by
the experimental measurement with maximum errors less than 11%.