Internal turning of sintered carbide parts: tool wear and surface roughness evaluation
Turning of sintered carbide parts has not been a common theme in the literature such as the case of other hardened materials. This is a statement made on the basis of recent research on this subject in which journals and conference proceedings were consulted. However, cutting of sintered cemented carbide parts, especially the turning operation, is an important task for a large number of applications where the typical properties of these materials are required. Therefore, the aim of this research was to carry out internal turning experiments in the manufacture of sintered cemented carbide dies used to forge beer cans. The focus of the experiments was to measure and analyze the workpiece surface roughness and wear of cutting edges used in internal turning process. Therefore, samples of sintered cemented carbide WC–Co (12% Co) were submitted to internal turning process with PCD insert tool. Cutting speed and feed rate were used as input variables in the experiments. It was found that, neither very low cutting speeds, nor high feeds can be used to avoid early breakage of the tool. Moreover, for the experiments where no early tool breakage occurred, the increase of feed caused the number of cutting passes prior to the cutting edge breakage to decrease and the workpiece surface roughness to increase. The experiments performed in this work confirm that sintered cemented carbide internal turning, besides being viable, is also feasible to be used to replace grinding operations, at least in terms of surface quality obtained.
KeywordsHard turning Sintered cemented carbide Surface roughness Tool wear
The authors are indebted to University of Taubaté and State University of Campinas, Nove de Julho University, and also to Brazilian Research Council (CNPq) for supporting this work.
- 1.Belmonte M, Ferro P, Fernandes AJS, Costa FM, Sacramento J, Silva RF (2003) Wear resistant CVD diamonds tools for turning of sintered hard metals. Diam Relat Mater 12(3–7):233–1268Google Scholar
- 4.Aouici H, Yallese MA, Chaoui K, Mabrouki T, Rigal JF (2011) Analysis of surface roughness and cutting force components in hard turning with CBN tool: prediction model and cutting conditions optimization. Measurement 45:344–353. https://doi.org/10.1016/j.measurement.2011.11.011 CrossRefGoogle Scholar
- 6.Kaçal A, Yildirim F (2013) High speed hard turning of AISI S1 (60WCrV8) Cold work tool steel. Acta Polytech Hung 10(8):169–186Google Scholar
- 11.Kuljanic E, Sortino M, Totis G (2010) Machinability of difficult machining materials. In: 14th International research—trends in the development of machinery and associated technologyGoogle Scholar
- 15.Ferreira R, Rehor J, Lauro CH, Carou D, Davim JP (2016) Analysis of the hard turning of AISI H13 steel with ceramic tools based on tool geometry: surface roughness, tool wear and their relation. J Braz Soc Mech Sci Eng 38(8):2413–2420. https://doi.org/10.1007/s40430-016-0504-z CrossRefGoogle Scholar
- 16.Sandvik http://www.sandvik.coromant.com/ens/products/Pages/productdetails.aspx?c = cnmg%20433-pf%204325
- 18.Degarmo EP, Black JT, Kohser RA (2003) Materials and processes in manufacturing, 9th edn. Wiley, New Jersey. ISBN 0-471-65653-4Google Scholar