In the process of machining outer cylinders of precision mechanical parts,a certain CNC machining workshop lacks unified operating standards and support from a standard cutting parameter library,resulting in a high rate of unqualified machining parts.In order to improve product accuracy and production efficiency,the main parameters during the cutting process(speed,feed rate,back cutting amount)were taken as the starting point to optimize machining accuracy.Finally,through experiments,it was found that the spindle speeds for rough turning and precision turning were 500 r/min and 1400 r/min,respectively,with feed rates of 140 mm/min and 110 mm/min.When the rough cutting allowance is set to 2.3 mm,the qualification rate of the processed parts can be increased from 84%to 93%,and the production efficiency can be improved by about 20%,with significant results.
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