Determination of optimal build direction in rapid prototyping with variable slicing

Several important factors must be taken into consideration in order to maximize the efficiency of rapid prototyping (RP) processes. The ability to select the optimal orientation of the build direction is one of the most critical factors in using RP processes, since it affects part quality, build time, and part cost. This study aims to determine the optimal build-up direction when a part is built with the variable layer thickness for different RP systems. The average weighted surface roughness (AWSR) that is generated from the stair stepping effect, the build time, and the part cost using the variable layer thickness are all considered in the process. Using the multi-attribute decision-making method, the best orientation is determined among the orientation candidates chosen from the convex hull of a model. The validity of the algorithm is illustrated by an example. The algorithm can help RP users select the best build-up direction of the part and create an efficient process planning.

[1]  Andrew Y. C. Nee,et al.  Multi‐objective optimization of part‐ building orientation in stereolithography , 1995 .

[2]  Massimo Martorelli,et al.  Surface roughness visualisation for rapid prototyping models , 2002, Comput. Aided Des..

[3]  Ching-Lai Hwang,et al.  Fuzzy Multiple Attribute Decision Making - Methods and Applications , 1992, Lecture Notes in Economics and Mathematical Systems.

[4]  Seth Allen,et al.  Part orientation and build cost determination in layered manufacturing , 1998, Comput. Aided Des..

[5]  H. Kristiansen,et al.  FLOW BOILING HEAT TRANSFER OF ELECTRONIC CHIPS IN HORIZONTAL CHANNELS , 1995 .

[6]  Duc Truong Pham,et al.  Part Orientation in Stereolithography , 1999 .

[7]  Ramaratnam R Bishu,et al.  Investigation of the effect of various build methods on the performance of rapid prototyping (stereolithography) , 1996 .

[8]  Pio G. Iovenitti,et al.  Part Build Orientations Based on Volumetric Error in Fused Deposition Modelling , 2000 .

[9]  C. Hwang.  Multiple Objective Decision Making - Methods and Applications: A State-of-the-Art Survey , 1979 .

[10]  Georges Fadel,et al.  Expert system-based selection of the preferred direction of build for rapid prototyping processes , 1995, J. Intell. Manuf..

[11]  Kunwoo Lee,et al.  The development of a CAD environment to determine the preferred build-up direction for layered manufacturing , 1998 .

[12]  Hong-Seok Byun,et al.  Design of a New Test Part for Benchmarking the Accuracy and Surface Finish of Rapid Prototyping Processes , 2003, ICCSA.

[13]  Ching-Lai Hwang,et al.  Multiple Attribute Decision Making: Methods and Applications - A State-of-the-Art Survey , 1981, Lecture Notes in Economics and Mathematical Systems.

[14]  Han Tong Loh,et al.  Considerations and selection of optimal orientation for different rapid prototyping systems , 1999 .