ISSN:
1662-7482
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Machining hardened steels has become an important manufacturing process, particularlyin the automotive and bearing industries. Hardened steel GCr15 with its harness between HRC50and HRC65 is one kind of more difficult machining material. Abrasive processes such as grindinghave typically been required to machine hardened steels, but advances in machine tools and a newcutting material of polycrystalline cubic boron nitride (PCBN) have allowed hard turning onmodern lathes to seems to gain an ever increasing industrial acceptance as an economically andenvironmentally friendly alternative to many grinding applications.In this paper, based on large deformation theory and updated Lagrangian procedure, a coupledthermo-mechanical plane strain orthogonal precision cutting model with general finite elementanalysis software is developed to the influence of cutting edge preparation on the cutting of GCr15with PCBN tool, such as cutting forces, shear angle, and cutting temperature. The three majordesigns of cutting edge preparation are used on most commercial cutting inserts: a) sharp edge, b)honed edge, and c) chamfer edge. The friction between the tool and the chip is assumed to follow ashear model and the local adaptive remeshing technique is used for the formation of chip. Thecalculated principle cutting forces are compared with published data and found to be in goodagreement. The simulation results can be used as a practical tool both by researchers and toolmakersto design new tools with rational tool edge and to optimize the cutting process
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.353.pdf
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