| 2013 №09 (07) | 2013 №09 (09) |
The Paton Welding Journal, 2013, #9, 46-49 pages
EFFECT OF RESIDUAL STRESSES ON JOURNAL FIXING IN GRINDING MILL BODY DURING SURFACING
V.A. KOROTKOV
Nizhni Tagil Technological Institute (branch), UralFederalUniversity (UrFU). 59, Krasnogvardejskaya Str., Nizhni Tagil. E-mail: vk@udgz.ruAbstract
External surfaces of journals of the raw processing mills are subjected to intensive wear due to friction in bearing parts. The wear reduces journal thickness. This can result in formation of longitudinal cracks in combination with residual tensile stresses from external repair surfacing. Recovery of journal strength by their surfacing on internal surface is proposed. Therefore effect of journal fixing is achieved, at that, lying in that the negative residual stresses reduce the operating stresses and allow the hollow cylinders to bear higher loads. Design analysis and experimental check of stressed state, forming in surfacing of the mill journal on internal surface, showed that the residual compression stresses are formed on the journal external surface. They are significant on value and develop autofixing effect increasing crack resistance of the journals from operating loads. 8 Ref., 3 Figures.
Keywords: surfacing, residual stresses, mill journals
Received: 26.06.13
Published: 28.09.13
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