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A Study on the Precision Hole Machiningof Pre Hardened Mould Steel  

Lee, Seung-Chul (엠엔티(주) 기업부설연구소)
Cho, Gyu-Jae (조선대학교 기계공학과)
Park, Jong-Nam (엠엔티(주) 기업부설연구소)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.2, 2012 , pp. 98-104 More about this Journal
Abstract
In this paper, precision processing is carried out for the pre hardened steel(HRC 54), which is one of injection mould materials. Processing characteristics are estimated according to the number of tool cutting blade and roundness is observed by the 3-Dimensional measuring machine. The surface roughness affected by the wire electric discharge machining are measured. Cutting component force of STAVOX is the highest in condition of 2F processing because load per a blade of cutting tool is high. Especially, the difference in Fz is over 20N by cutting load. The slower spindle rotation speed and tool feed rate are, the better cutting component force is. The roundness of hole processed in condition of 4F is good because feed rate is able to be fast. When rotation speed is increased, the surface roughness is decreased. The surface roughness acquired in condition of 2F processing is higher about 50% than 4F processing.
Keywords
STAVAX; Jig Boring Machine; Roundness; 3-Dimensional Measuring Machine;
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