Wire EDM machine allows Ra 0.1um surface-finishes
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Precision Micro product story
Edited by the Engineeringtalk editorial team
Apr 10, 2009
Precision Micro has installed a high-precision CNC driven Wire EDM machine to incorporate fine, high aspect ratio features into components.
The Wire EDM machine can produce precision high-aspect ratio apertures with surface finishes down to Ra 0.1um, which eliminates the need for subsequent polishing on many applications.
Mick Taylor, market development manager for Precision Micro, said: 'To further increase the productivity of an already very efficient machine, we have invested in a low profile, universal, work holding tooling system.
'By presetting the work piece away from the machine, we are able to minimise machine set-up times, improve flexibility and increase our machine capacity, all of which helps us to be more competitive.' In a recent request for a component incorporating high aspect ratio features, a major opto-electronics customer needed some multi-aperture plates from a 0.50mm-thick special stainless material.
The item could be manufactured economically using precision etching techniques, but the design included a fine radial slot only 0.2mm wide, an aspect ratio outside the capabilities of the etching process.
The design also asked for a high-quality cut surface finish and dimensional accuracy of +/- four microns.
By combining its precision etching and wire EDM processes, Precision Micro was able to meet the demands economically without the need for custom tooling.
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