| Summary: | 碩士 === 國立成功大學 === 機械工程研究所 === 82 === In this thesis, two kinds of tool path generation methods are
developed for machining of Variable Pitch Lead Screw with four
oscillatory meshing elements (V.P.L.S.) on five-axis numerical
controlled machine. The first one is by generating method with
form-mill cutter, according to the geometry of V.P.L.S.
mechanism. The machine tool settings is calculated and the tool
path is generated. A five-axis machine center is used for the
machining of the screw profile. The other method is by combined
generating and sculpturing method with end-mill cutter.
Through the coordinate transformation, the surface normal
vector operation and the tool offset calculation, this new
method combined surface generating with surface sc Finally, the
developed tool path generationmethods are verified through
computer graphic simulation and the trial cut with model
material. The advantages of the proposed methods over the
sculpturing method are discussed. The results show that the
mathematical errors of V.P.L.S. surface can be controlled
within tolerance by the proposed methods.
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