Analysis of the surface roughness after the sintered carbides turning with PCD tools

This paper describes the research results of surface quality research after the sintered carbides turning by the tools with edges made of polycrystalline diamonds (PCD). The research trials were conducted for tools with different nose radii and the influence of three independent parameters (vc, f, repsilon) affecting the surface roughness were analyzed. The impact of the binder material content Co (cobalt) on the surface quality during the turning process (according to the values of surface roughness parameter Ra) is described further on. The values of vc, f, repsilon at which the smallest surface roughness (for the particular work piece materials) could be achieved were defined. Based on the ANOVA variance analysis it was possible to find different effects of the research factors on the surface roughness (for the two types of sintered carbides shafts). For the shaft with 25% Co content, the significant influence is for two parameters: the cutting speed vc and the nose radius repsilon. For the shaft with 15% Co percentage content, the significant influence is only for the nose radius repsilon.

[1]  M. Cook,et al.  Trends and recent developments in the material manufacture and cutting tool application of polycrystalline diamond and polycrystalline cubic boron nitride , 2000 .

[2]  Vimal Dhokia,et al.  Energy efficient process planning for CNC machining , 2012 .

[3]  H. Sohn,et al.  Synthesis, sintering, and mechanical properties of nanocrystalline cemented tungsten carbide - A review , 2009 .

[4]  Berend Denkena,et al.  Advancing Cutting Technology , 2003 .

[5]  Joseph A. Arsecularatne,et al.  Wear and tool life of tungsten carbide, PCBN and PCD cutting tools , 2006 .

[6]  Rui F. Silva,et al.  Machining hardmetal with CVD diamond direct coated ceramic tools: effect of tool edge geometry , 2005 .

[7]  Kazuo Yamazaki,et al.  Design and development of PCD micro straight edge end mills for micro/nano machining of hard and brittle materials , 2010 .

[8]  P. Louda,et al.  Nanocrystalline diamond, its synthesis, properties and applications , 2006 .

[9]  Domnita Fratila,et al.  Sustainable Manufacturing Through Environmentally-Friendly Machining , 2013 .

[10]  Mahmudur Rahman,et al.  Machinability study of tungsten carbide using PCD tools under ultrasonic elliptical vibration cutting , 2009 .

[11]  Mark J. Jackson,et al.  Machining with Nanomaterials , 2015 .

[12]  Peter Krajnik,et al.  Modern machining of die and mold tools , 2004 .

[13]  Florinda M. Costa,et al.  Wear resistant CVD diamond tools for turning of sintered hardmetals , 2003 .

[14]  Youngsik Choi A Comparative Study of Residual Stress Distribution Induced by Hard Machining Versus Grinding , 2009 .

[16]  Viktor P. Astakhov,et al.  Machining of Hard Materials – Definitions and Industrial Applications , 2011 .

[17]  Wojciech Zębala,et al.  Cutting data correction in Inconel 718 turning , 2013 .

[18]  J. Paulo Davim,et al.  Machining of Hard Materials , 2011 .

[19]  Zhaowei Zhong,et al.  Surface roughness characterization of thermally sprayed and precision machined WC-Co and Alloy-625 coatings , 2007 .

[20]  Khechba Mourad Khechba Mourad,et al.  Study of structural and mechanical properties of tungsten carbides coatings , 2011 .

[21]  Rui F. Silva,et al.  Cutting forces evolution with tool wear in sintered hardmetal turning with CVD diamond , 2003 .