Milling Using Ultra-Small Diameter Ball End Mills Fabricated by Electrical Discharge Machining

Autor:	Katsumi Mizutani, Kai Egashira
Rok vydání:	2003
Předmět:	Brass Electrical discharge machining Materials science Small diameter Fabrication Mechanical Engineering visual_art Electrode Metallurgy Ball (bearing) Cemented carbide Surface roughness visual_art.visual_art_medium
Zdroj:	Journal of the Japan Society for Precision Engineering. 69:1449-1453
ISSN:	1882-675X 0912-0289
DOI:	10.2493/jjspe.69.1449
Popis:	Ultra-small diameter cemented carbide ball end mills have been developed. Tools having a radius of ball nose of 10μm have been manufactured by electrical discharge machining (EDM), because conventional methods cannot be readily applied to microtool fabrication. The spherical shape of the tool cutting part is realized via an electrode wear phenomenon in EDM. Milling of brass using fabricated tools has been performed at 2 μm axial depth of cut and 4 μm pick feed. Although simulation suggests the surface roughness (Rz) in tool feed direction to be 0.05 μm at 100 μm/s feed speed, in actual milling, the surface roughness is 0.42 μm, due to plastic deformation of the workpiece. Investigations indicate that the tool life decreases rapidly when the feed speed or the body length increases above a certain value. The tool life can be improved, especially at low feed speeds, by changing the angle between the two planes that each contain one ball end cutting edge from 180°to 90°.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::27b1d758f2c87c8a40cbdc5fd530a1b7 https://doi.org/10.2493/jjspe.69.1449 Zobrazit plný text záznamu