This work deals with an experimental study on the frictional properties of connecting rod high strength screws. Considering that friction has a significant impact on the achievable preload for fixed and controlled tightening torque, the question of friction reduction was tackled by suitable surface treatments. Deep-rolling and shot-peening were involved in the campaign that proved the latter has a highly beneficial effect at reducing friction. Moreover, bearing friction coefficient is made barely steady versus repeated tightening in both lubricated and dry conditions.
Deep rolling and shot-peening to improve the tribological response of connecting rod screws
Croccolo, Dario;De Agostinis, Massimiliano;Fini, Stefano;Olmi, Giorgio
;Paiardini, Luca;Robusto, Francesco
2019
Abstract
This work deals with an experimental study on the frictional properties of connecting rod high strength screws. Considering that friction has a significant impact on the achievable preload for fixed and controlled tightening torque, the question of friction reduction was tackled by suitable surface treatments. Deep-rolling and shot-peening were involved in the campaign that proved the latter has a highly beneficial effect at reducing friction. Moreover, bearing friction coefficient is made barely steady versus repeated tightening in both lubricated and dry conditions.File in questo prodotto:
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