Statistical analysis of the effect of machining parameters on the straightness error of high carbon steel turned components

• Abdulmansaf A Bouzaid

  The Higher Institute for general Vocations, Derna, Libya

  Author

• Farag A. M Alwahdi

  Department of Mechanical Engineering, Omar Almukhtar University ,Libya

  Author

• and Ahmad K. B Almajri

  The Higher Institute for general Vocations, Derna, Libya

  Author

The objective of the present work is to study the effect of machining parameters on the straightness error of cylindrical parts of high carbon steel (SAE 1095) having hardness 210 BH produced in a lathe machine. The considered turning parameters that affect the straightness error are cutting speed ,feed rate and depth of cut at three levels for each parameter with two replicates of different length by diameter ratio for instance there are 3x3x3x2= 54 specimens to be  machined. The straightness error are measured for each specimen and statistical analysis are carried out .The analysis of variance performed on the measured data shows that the cutting speed is the most significant factor affecting  straightness error, secondly  the feed rate and lastly the depth of cut. Also, the interaction cutting speed-depth of cut  and cutting speed-feed rate-depth of cut  affect the straightness error of the machined work piece too. The present work is provided with three dimensional surface graphs which show low straightness error at high cutting speed for each considered level of  feed rate and depth of cut.

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