| Author | Tolentino, Josiebeth M. |
| Call Number | AIT Thesis no.CS-88-14 |
| Subject(s) | Milling-machines--Numerical control
|
| Note | A thesis submitted in partial fulfillment. of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Machining of free form surfaces is a current bottleneck in computer - aided
manufacturing . An interface is at present lacking that will bridge the gap from
surface desi g n to actual machining .
This study presents such an interface specifically designed for 5- axis
milling of surfaces represented as bicubic parametric patches. That is, given
surface da t a as a collection of patch data, the system automatically generates
the necessary tool coordinates plus the appropriate tool orientation that will
mill the surface to the desired degree of surface finish and shape. The milling
process is divided into two phases; namely , rough- to- depth milling a nd s u r f ace
con touring. Tool path generation is carried out based on user - supplied
machining specifications like, tool cutter radius, chorda l deviation a nd scallop
height tolerance values. For evaluation purpose s, the interface is enhanced with
a graphics module that would allow visual verification of the validity of the
generated tool paths.
The interface can handle tool path generation for milling multiple patches.
Optimization of the tool path is achieved by gene r a ting coordinates based on
chordal deviation tolerance, scallop height tolerance, a nd the assumption of
Zig- zag tool motion. Rough- to-depth milling is likewise optimized by using a
two- phase process for removing excess material be for e contouring. |
| Year | 1988 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Computer Science (CS) |
| Chairperson(s) | Kanchit Malaivongs ;Bohez, Erik L.J. |
| Examination Committee(s) | Tabucanon, Mario T.
|
| Scholarship Donor(s) | DAAD |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |