Optimization of Cutting Parameters in Hard Turning of AISI H10A Steel under Minimum Quantity Lubrication

Year 2019, Volume: 3 Issue: 2, 157 - 164, 10.10.2019

Mustafa Günay , Halil Demir , Mehmet Erdi Korkmaz , Ramazan Çakıroğlu

Abstract

In
this study, influences of cutting parameters in hard turning of hot work tool
steel by applying minimum quantity lubrication (MQL) were investigated and
optimized by using Taguchi methodology. Firstly, the machinability experiments
on hardened AISI H10A hot work tool steel with CBN inserts were performed under
the MQL condition. The experiments were carried out by Taguchi’s L9 orthogonal
array. The machinability of AISI H10A steel were evaluated in terms of average
surface roughness (Ra) and main cutting force (Fc). The analysis of variance
(ANOVA) was applied to determine the effects of cutting parameters (cutting
speed, feed rate and depth of cut) on surface roughness and cutting force. It
was observed that surface roughness and cutting force increased with increasing
feed rate and depth of cut in machining by applying MQL with uncoated CBN
inserts. Depth of cut was determined as the most important parameter on surface
roughness with 66.57% PCR while feed rate was determined on cutting force with
50.68% PCR. On the other hand, optimum cutting parameters for surface roughness
and cutting force were found at different levels as a result of Taguchi
optimization.

Keywords

AISI H10A, MQL, optimization, cutting force, surface roughness

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