Failure probabilistic model of CNC lathes

A field failure analysis of computerized numerical control (CNC) lathes is described. Field failure data was collected over a period of two years on a pproximately 80 CNC lathes. A coding system to code failure data was devise d and a failure analysis data bank of CNC lathes was established. The failu re position and subsystem, failure mode and cause were analyzed to indicate the weak subsystem of a CNC lathe. Also, failure probabilistic model of CN C lathes was analyzed by fuzzy multicriteria comprehensive evaluation. (C) 1999 Elsevier Science Ltd. All rights reserved.