Non-constant parameter NC tool path generation on sculptured surfaces

1994 ◽  
Vol 9 (5) ◽  
pp. 281-290 ◽  
Author(s):  
Yunching Huang ◽  
James H. Oliver
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Path Generation ◽  
Constant Parameter ◽  
Sculptured Surfaces

Non-Constant Parameter NC Tool Path Generation on Sculptured Surfaces

1992 ◽  
Author(s):  
Yunching Huang ◽  
James H. Oliver
Keyword(s):  
Tool Path ◽  
Essential Elements ◽  
Tool Path Generation ◽  
Path Generation ◽  
Constant Parameter ◽  
Sculptured Surfaces ◽  
Model Surface ◽  
Machining Error ◽  
Part Surface ◽  
Part Model

Abstract An algorithm for three-axis NC tool path generation on sculptured surfaces is presented. Non-constant parameter tool contact curves are defined on the part by intersecting parallel planes with the part model surface Four essential elements of this algorithm are introduced: initial chordal approximation, true machining error calculation, direct gouge elimination, and non-constant parameter tool pass interval adjustment. A software implementation of this algorithm produces graphical output depicting the tool path superimposed over the part surface, and it outputs cutter location (CL) data for further postprocessing. Several applications examples are presented to demonstrate the capabilities of the algorithm The results of this technique are compared to those generated from a commercially available computer-aided manufacturing program, and indicate that equivalent accuracy is obtained with many fewer CL points.

Flat-Ended Tool Swept Sections for Five-Axis NC Machining of Sculptured Surfaces

1999 ◽  
Vol 122 (1) ◽  
pp. 158-165 ◽  
Author(s):  
R. Sarma
Keyword(s):  
Numerical Methods ◽  
Tool Path ◽  
Nc Machining ◽  
Tool Path Generation ◽  
Path Generation ◽  
Sculptured Surfaces ◽  
Accurate Representation ◽  
Five Axis

The concept of swept sections for flat-ended tools is revisited with the goal of improving the accuracy of calculations in five-axis tool path generation. Firstly, the notions of partial and total swept sections (distinct from traditional swept sections) are introduced. It is shown that partial and total swept sections provide a more accurate representation of the geometry of the moving tool compared to traditional swept sections. Next, geometric and numerical methods focused on calculating partial swept sections are presented. These methods are based on calculating plane-circle intersections. Finally, the calculated partial swept sections are compared to the traditional swept sections. Variations from the traditional swept sections are characterized to provide guidelines to the tool path programmer. [S1087-1357(00)71101-4]

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