ISSN:
1013-9826
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:
The 5-axis milling processes were conducted with several uncoated WC-Co tools, which arewith taper ball end mills with four flutes. There is a severe problem of high rate of tool failure, which hasled to the high cost and low productivity of the milling process. In order to find out the real reason, someformer work, which included the tool geometry analysis, tool path and tool posture analysis, as well as thecutting force calculating, had been done. It has been found that most of the tool failures are resulted fromcutting edge chipping or the workpiece material of titanium alloys attached to the tool. Meanwhile, asuddenly applied load or an abrupt unloading of the tool at the end of a cut is another important factor.Moreover, the tool materials had been analyzed, which included the element composition analysis withXRD, the microstructure analysis with SEM. XRD results indicate the cobalt at the tip of tool is less thanat the shank of tool. SEM results indicate there are micro-cracks concentrated in the cutting edge area.The tool material failure mechanism will be set up based on the tool material analysis in this study
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1137.pdf
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