NDLI: Geometry features of breakage section and variation of cutting force for end mills after brittle breakage

Content Provider	Springer Nature Link
Author	Liu, Can Wu, Jing quan Liu, Huan lao Li, Guang hui Tan, Guang yu
Copyright Year	2015
Abstract	Some broken end mills with many brittle breakage sections were collected, and the geometry features of these sections were summed up. As for minor breakage, the breakage sections were narrow planes parallel to the tool edge, and the depths of breakage were shallow. As for severe breakage, it likely occurred near the edge tip; its breakage sections were approximate planes perpendicular to the bottom of tool and tilted approximately 35° to the bottom edge; moreover, the broken degree of section side near the rake face was heavier, while that near the flank face was slighter. By taking these geometry features into account, mathematical instantaneous expressions of cutting force for broken end mills were amended correspondingly. Then, with these expressions, it could be analyzed that, on one hand, the amount of material removed by broken edge segment declined and, on the other hand, its coefficient of cutting force rose; therefore, the instantaneous cutting force might be in reverse relation with broken degree, and in positive relation with feed, and also the removed material by the tooth following the broken one would rise. These results indicate that, if a tooth is brittle broken, there exist two kinds of possibility as rise and decline for its cutting force—the cutting force of slightly broken tooth would rise, while that of heavily broken tooth would decline, the cutting force of tooth following the broken one would always rise, and that of other teeth would remain the same. Using artificial tooth breakage, cutting tests of broken end mills were taken; the test results agreed with above conclusions. Conclusions of this study may be used in modifying indices of monitoring brittle breakage for end mills.
Starting Page	1345
Ending Page	1358
Page Count	14
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	84
Issue Number	5-8
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2015-09-15
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	End mills Brittle breakage Section Cutting force Mathematical expression Experiment Industrial and Production Engineering Production Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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