Improvements on surface quality of EDMED surfaces


Bayramoglu M. , DUFFILL A.

SURFACE ENGINEERING, vol.19, no.1, pp.70-74, 2003 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 1
  • Publication Date: 2003
  • Doi Number: 10.1179/026708403225002450
  • Title of Journal : SURFACE ENGINEERING
  • Page Numbers: pp.70-74

Abstract

The traditional method of producing a free form shape by Electro discharge machining (EDM) is to produce the form on the tool and plunge this tool into the workpiece. One drawback however, is the cost and wear of these tools, particularly when producing complex shapes. CNC systems introduced on ram type machines, facilitates more sophisticated tool motions and the possibility of generating complex shapes with simple types of tools. Unlike the traditional EDM which uses 3D form tools, the use of simple tools causes a concentration of heat on the unwanted work piece material. Therefore, the characteristics of the surfaces obtained with simple tools could be different from the surfaces obtained in traditional EDM In this work, the characteristics of ED Med surfaces obtained by simple tools are produced by measuring the surface roughness, heat affected zones, microcracks and microhardness. The results are then discussed and comparisons are made with 3D form tools.