Dimensional analysis and ANN simulation of chip-tool interface temperature during turning SS304

OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 4 coated carbide tool. This could be attributed to the lower coef fi cient of friction offered by the multi-layer tool rake surface to fl owing chips as con fi rmed from the back surface of the chips. On the other hand, the highest cutting force was observed with uncoated carbide tools. The present study concludes that a comparative evaluation of the machining performance in terms of tool life, tool wear mechanisms, surface roughness, etc. is required while turning SS304 using PVD -coated single later TiAlN and multi-layer TiN / TiAlN coated carbide tools. Conclusions Turning experiments on SS304 austenitic stainless steel were performed with uncoated and PVD single- layer TiAlN and multi-layer TiN / TiAlN coated carbide tools. The classical tool-work thermocouple principle was used to measure the cutting temperature. The chip-tool interface temperature was investigated with statistical-based, dimensional analysis, and arti fi cial neural network models. The following conclusions could be drawn.  It was noticed that the chip-tool interface temperature depends more on the cutting speed followed by the chip cross-sectional area and the speci fi c cutting pressure. Uncoated tool exhibited the lowest cutting temperature due to its higher thermal conductivity and large wear-out area of the tool during machining resulting in rapid dissipation of the interface heat into the tool.  A lower cutting temperature was observed for the single-layer TiAlN coated tool than the multi-layer TiN / TiAlN coated tool. This could be attributed to its higher thermal conductivity than the equivalent thermal conductivity of the TiN / TiAlN coated tool. However, the lower cutting force was observed with the multi- layer TiN / TiAlN coated carbide tool that could be attributed to the lower coef fi cient of friction offered by the rake surface of this tool to fl owing chips. On the other hand, the highest cutting force was observed with uncoated carbide tools.  The results predicted by all the developed models for the temperature of the chip-tool interface for different tools are in good agreement with the experimental results with an absolute error of less than 5%. However, the results predicted by the ANN model showed better agreement with the experimental results than statistical-based and dimensional analysis models, and therefore, the developed ANN model can be reliably used for predicting chip-tool interface temperature during SS304 turning. References 1. Grzesik W. Experimental investigation of the cutting temperature when turning with coated indexable inserts. International Journal of Machine Tools and Manufacture , 1999, vol. 39, iss. 3, pp. 355–369. DOI: 10.1016/S0890- 6955(98)00044-3. 2. Grzesik W. The role of coatings in controlling the cutting process when turning with coated indexable inserts. Journal of Materials Processing Technology , 1998, vol. 79, iss. 1–3, pp. 133–143. DOI: 10.1016/S0924-0136(97)00491-3. 3. Pal A., Choudhury S.K., Chinchanikar S. Machinability assessment through experimental investigation during hard and soft turning of hardened steel. Procedia Materials Science , 2014, vol. 6, pp. 80–91. DOI: 10.1016/j. mspro.2014.07.010. 4. Abhang L.B., Hameedullah M. Chip-tool interface temperature prediction model for turning process. International Journal of Engineering Science and Technology , 2010, vol. 2, iss. 4, pp. 382–393. 5. Alvelid B. Cutting temperature thermo-electrical measurements. Annals of CIRP , 1970, vol. 18, pp. 547–554. 6. Chinchanikar S., Choudhury S.K. Evaluation of chip-tool interface temperature: effect of tool coating and cutting parameters during turning hardened AISI 4340 steel. Procedia Materials Science , 2014, vol. 6, pp. 996–1005. DOI: 10.1016/j.mspro.2014.07.170. 7. Chinchanikar S., Choudhury S.K., Kulkarni A.P. Investigation of chip-tool interface temperature during turning of hardened AISI 4340 alloy steel using multi-layer coated carbide inserts. Advanced Materials Research , 2013, vol. 701, pp. 354–358. DOI: 10.4028/www.scienti fi c.net/AMR.701.354. 8. Panneerselvam T., Kandavel T.K., Sreenivas S.A., Karthik S., Andru M.M. Effects of working parameters on performance characteristics of cutting tools processed through powder metallurgy under turning operation. Journal of Materials Engineering and Performance , 2021, vol. 30, iss. 4, pp. 2890–2898. DOI: 10.1007/s11665- 021-05622-6.