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Study on Effects of Flow Rate of Coolant During CO2-Assisted MQL Turning of EN31 Steel

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Abstract

The impact of Minimum Quantity Lubrication (MQL) plays a pivotal role in the modern metal-cutting industry for sustainable manufacturing. Despite being one of the oldest machining processes, turning remains a crucial manufacturing technique with significant industrial relevance. But in the modern era, sustainability issues like economic, health, and socials hinder the machining processes. Hence, in this research work, liquid CO2-assisted Minimum Quantity Lubrication condition is employed at a variable flow rate in turning EN31 alloy steel. The effect of process parameters was thoroughly investigated to set the Liquid CO2-assisted MQL's flow rate so that the productivity and product quality remain intact. In addition, the microstructures were also studied by scanning electron microscopy (SEM) to image the material's surface after machining. The images can reveal details about the size, shape, and distribution of chips and the presence of defects or other surface features. Thus, the work figures out the proper flow rate for desired output and studies the behavior of responses. The study reveals that the 2.5 ml/min flow rate yields minimum surface roughness (Ra), minimum rake surface temperature rise (Trake) and maximum material removal rate (MRR).

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Funding

The first and third authors are gratefully acknowledge the funding received from the University of Engineering and Management Kolkata under the grand-in aided project.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Engineering and Management Kolkata, Kolkata, India

    Sutanu Misra & Goutam Paul

  2. Department of Mechanical Engineering, National Institute of Technology Patna, Patna, Bihar, India

    Sutanu Misra & Yogesh Kumar

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  1. Sutanu Misra
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Authors have equally contributed in the paper. The first author has carried out the research work under the supervision of the second & third author.

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Correspondence to Yogesh Kumar.

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Misra, S., Kumar, Y. & Paul, G. Study on Effects of Flow Rate of Coolant During CO2-Assisted MQL Turning of EN31 Steel. J. Inst. Eng. India Ser. C 105, 41–57 (2024). https://doi.org/10.1007/s40032-023-01011-1

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