Abstract
This paper studies the effects of lubricants on the failure and reliability of cams. Experimental investigations of the influence of lubricants on cam failure have been carried out at a metalworking factory. This paper presents following: – A classification of industrial oils for cams. To establish this classification, two essentials of parameters have been taken into account: the environment (ambient temperature) and the cam operating conditions (load and sliding velocity). – A flowchart of lubricating oil selection procedure for cams as a function of all relevant influencing factors. – An analysis of the symptoms and the causes of failure of machine tool cams. – An analysis of the average life and curves of cam reliability of machine tools as a function of tribological properties of some industrial oils. The obtained results have proved that the tribological properties of lubricants has a great influence on: – reduction of failures, – extension of the life and – increase of the reliability of cams.
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