Design and NC Machining of Concave-Arc Ball-End Milling Cutters |
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Authors: | W-F Chen C-K Chen H-Y Lai |
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Affiliation: | (1) Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan, TW |
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Abstract: | The paper presents a geometric modelling approach for the precision design and NC machining of a concave-arc ball-end milling
(CABEM) cutter which is an important tool for mould-making industries. This paper presents systematic models of the cutting
edge, helical groove, and grinding wheel design for the NC machining of a CABEM cutter. Both the normal to the revolving axis
and the tangent to the groove, are used to derive the required precision sectional profiles of the grinding wheel. In compliance
with the maximal sectional radius of the cutter, the profile of the groove section and both the radial and axial cutting speeds
of the grinding wheel are computed in sequence. Using the computer simulation results of the groove actually obtained, this
paper proposes a method to resolve the problems of the residual revolving surface and the narrow cutting edge strip. This
paper is intended to serve as a reference for the design and NC machining of cutters of this type . |
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Keywords: | : Concave-arc ball-end milling cutter Helical groove NC machining Reverse engineering |
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