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Optimal Tool Length Computation of NC Data for 5-axis Ball-ended Milling  

Cho, Hyeon-Uk (영남대학교 대학원 기계공학과)
Park, Jung-Whan (영남대학교 기계공학부)
Publication Information
Korean Journal of Computational Design and Engineering / v.15, no.5, 2010 , pp. 354-361 More about this Journal
Abstract
The paper presents an efficient computation of optimal tool length for 5-axis mold & die machining. The implemented procedure processes an NC file as an initial input, where the NC data is generated by another commercial CAM system. A commercial CAM system generates 5-axis machining NC data which, in its own way, is optimal based on pre-defined machining condition such as tool-path pattern, tool-axis control via inclination angles, etc. The proper tool-length should also be provided. The tool-length should be as small as possible in order to enhance machinability as well as surface finish. A feasible tool-length at each NC block can be obtained by checking interference between workpiece and tool components, usually when the tool-axis is not modified at this stage for most CAM systems. Then the minimum feasible tool-length for an NC file consisting of N blocks is the maximum of N tool-length values. However, it can be noted that slight modification of tool-axis at each block may reduce the minimum feasible tool-length in mold & die machining. This approach can effectively be applied in machining feature regions such as steep wall or deep cavity. It has been implemented and is used at a molding die manufacturing company in Korea.
Keywords
5-Axis Machining; Optimal Tool Length; NC Data;
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Times Cited By KSCI : 3  (Citation Analysis)
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