ASSESSMENT OF SURFACE FINISH AND DIMENSIONAL ACCURACY OF TOOLS MANUFACTURED BY METAL CASTING IN RAPID PROTOTYPING SAND MOULDS

Authors

  • K Nyembwe Department of Metallurgy, University of Johannesburg, South Africa
  • DJ de Beer Technology and Transfer Innovation, Vaal University of Technology, South Africa
  • JG van der Walt Department of Mechanical Engineering and Applied Mathematics, Central University of Technology, South Africa
  • S Bhero Department of Metallurgy, University of Johannesburg, South Africa

DOI:

https://doi.org/10.7166/23-3-516

Abstract

In this paper, an initial assessment of the quality parameters of the surface finish and dimensional accuracy of tools made by metal casting in rapid prototyping (RP) sand moulds is undertaken. A case study from a local tool room, dealing with the manufacturing of an aluminium die for the lost wax process, is employed. Modern techniques, including surface roughness analysis and three dimensional scanning, are used to determine and understand how each manufacturing step influences the final quality of the cast tool. The best surface finish obtained for the cast die had arithmetic average roughness (Ra) and mean average roughness (Rz) respectively equal to 3.23

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Published

2012-12-03

How to Cite

Nyembwe, K., de Beer, D., van der Walt, J., & Bhero, S. (2012). ASSESSMENT OF SURFACE FINISH AND DIMENSIONAL ACCURACY OF TOOLS MANUFACTURED BY METAL CASTING IN RAPID PROTOTYPING SAND MOULDS. The South African Journal of Industrial Engineering, 23(3), 130–143. https://doi.org/10.7166/23-3-516

Issue

Vol. 23 No. 3 (2012)

Section

General Articles

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