Download:
by David C. Thompson, Richard H. Crawford
Journal of Manufacturing Systems
http://madlab.me.utexas.edu/~dcthomp/pubs/JMS_Orient.pdf
Add To MetaCart
Abstract:
Parts formed using freeform fabrication processes can vary significantly in quality depending on the orientation of the workpiece during manufacture. This paper presents four measures of quality for three performance measures in which this occurs, along with computational methods for computing their expected effects on faceted representations of a workpiece. The optimization of these quality measures is an important step in the automation of manufacturing straight from CAD models. The quality metrics developed quantify build time, material strength, and surface approximation error as functions of part orientation. A series of experiments performed on polycarbonate tensile specimens produced with selective laser sintering (SLS) show how significant orientation can be. Although SLS and selective area laser deposition (SALD) are used in the examples, the measures are applicable to other technologies as well. A preliminary investigation into the optimization of orientation with these measures is discussed, showing how properties of the measures developed can be used to generate trial orientations for the global optimization problem where several measures are combined. KEYWORDS solid freeform fabrication (SFF), process planning, workpiece orientation
Citations
|
230
|
Design and analysis of experiments
– Montgomery
|
|
22
|
Visibility maps and spherical algorithms
– Woo
- 1994
|
|
14
|
Computational geometry on the sphere with application to automated machining
– Chen, Woo
- 1992
|
|
13
|
Spherical maps: Their construction, properties, and approximation
– Gan, Woo, et al.
- 1994
|
|
13
|
Maximum intersection of spherical polygons and workpiece orientation for 4- and 5-axis machining
– Tang, Woo, et al.
- 1992
|
|
12
|
Handbook of Surface Metrology
– Whitehouse
- 1994
|
|
9
|
A general theory of strength for anisotropic materials
– Tsai, Wu
- 1971
|
|
7
|
Ishai O. Engineering mechanics of composite materials
– Daniel
- 1994
|
|
6
|
Multicriterion Optimization in Engineering
– Osyczka
- 1984
|
|
5
|
Metal Parts Generation by Three Dimensional Printing
– Michaels, Sachs, et al.
- 1992
|
|
4
|
Solid freeform fabrication: An advanced manufacturing approach
– Bourell, Beaman, et al.
- 1990
|
|
3
|
olid Freeform Fabrication: A New Direction in Manufacturing. Kluwer, not yet published
– Beaman, Barlow, et al.
- 1997
|
|
3
|
On the computation of part orientation and support structures for layered manufaturing
– Allen, Dutta
- 1994
|
|
2
|
Effect of processing parameters in SLS of metal-polymer powders
– Badrinarayan, Barlow
- 1995
|
|
2
|
Rapid prototyping: A global view
– Campbell, Dickens
- 1994
|
|
2
|
Solid freeform fabrication of functional ceramic components using a laminated object manufacturing technique
– Griffin, Daufenbach, et al.
- 1994
|
|
2
|
FDM technology process improvements
– Comb, Priedeman, et al.
- 1994
|
|
2
|
Integration of a solid freeform fabrication process into a feature-based CAD system environment
– Suh, Wozny
- 1995
|
|
2
|
A world wide assessment of rapid prototyping technologies
– Aubin
- 1994
|
|
2
|
Microstructural elements of components derived from 3 D printing
– Cima, Lauder, et al.
- 1992
|
|
1
|
Advances in selective area deposition of silicon carbide
– Tompkins, Laabi, et al.
- 1994
|
|
1
|
Modeling of polymer degradation
– Vail, Barlow
- 1994
|
|
1
|
Three-dimensional effective moduli of orthotropic and symmetric laminates
– Tsai
- 1992
|
