Parameter Optimization for Improvement in Biomachining Performance

doi:10.16356/j.1005-1120.2019.03.002

Transactions of Nanjing University of Aeronautics & Astronautics

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Archive > Volume 36 Issue 3 > 2019,36(3):376-386. DOI:10.16356/j.1005-1120.2019.03.002 Prev Next

Parameter Optimization for Improvement in Biomachining Performance

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Abstract:

Biomachining utilizing chemolithotrophic microorganisms for material removal is one of the recently developed non-traditional machining methods offering innovative, low cost and environment-friendly benefits. However, its shortcomings are also obvious, low material removal rate (MRR), poor stability and low surface quality. The effects of temperature, shaking rate, pH value and bacteria concentration on the MRR, machining stability (linearity of material removal-time relationship) and surface roughness (Ra) are investigated using Taguchi methodology. The results indicate that the shaking rate is the most crucial parameter for the MRR and stability of MRR; while temperature is the most influential parameter for surface Ra. The optimum process parameters for overall machining property are temperature of 20 ℃, shaking rate of 160 r/min, pH of 1.8 and bacteria concentration of 3.32 × 10⁷ cells/ml.

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TH161.1