https://orcid.org/0000-0002-2042-0921
![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
ABSTRACT
To improve the quality of the product produced considering productivity, it is important to evaluate the factors affecting the machining experimentally and analytically. Looking at the harmful effects of conventional cutting fluid on the environment and workers’ health, in the current research work effort has been made to explore the effectiveness of minimum quantity lubrication (MQL) and solid lubricant in machining. Micron-sized calcium fluoride (CaF2) solid lubricant powder particles are mixed in SAE 40 cutting oil and applied to the machining area with minimum quantity lubrication. The effect of different particle sizes and wt% of CaF2 has been analysed by measuring surface roughness, chip-tool interface temperature, flank wear of the tool, and cutting forces. Results demonstrated that the smaller size and 20 wt% of CaF2 powder have improved the process performance by lowering surface roughness and tool wear. The effectiveness of solid lubricant can be viewed as an alternative compared to wet machining. The results can be used by related industries to improve machining performance with the use of MQL and solid lubricants leading towards clean and sustainable manufacturing.
Acknowledgments
The study was financially supported by Nirma University, Ahmedabad, India for the minor research project titled “Performance evaluation of solid lubricants mixed with SAE-40 oil in machining of EN-31 steel material” wide letter No. NU/Ph.D./MRP/IT/ME/15-16/540, Dated 01/05/2015 and “Investigations on application of minimum quantity solid lubrication in machining process” wide letter No. NU/Ph.D./MRP/IT-ME/16-17/924, Dated 30/05/2016.
Disclosure statement
The authors declare that they have no conflict of interest.
Nomenclature and acronyms
| MQL | = | Minimum quantity lubrication |
| MQSL | = | Minimum quantity solid lubrication |
| PVD | = | Physical vapor deposition |
| CaF2 | = | Calcium fluoride |
| MoS2 | = | Molybdenum disulphide |
| AISI | = | American iron and steel institute |
| BUE | = | Built-up-edge |
| Vc | = | Cutting speed (m/min) |
| f | = | Feed (mm/rev) |
| ap | = | Depth of cut (mm) |
| Vb | = | Flank wear |
| Al2O3 | = | Aluminium oxide |
| TiAlN | = | Titanium aluminum nitride |
| TiCN | = | Titanium carbo-nitride |
| TiN | = | Titanium nitride |
| HRC | = | Hardness Rockwell C |
| ISO | = | International Organization for Standardization |
| Ra | = | Average surface roughness |