Metal tools and implements – making – Blank or process – Die
Reexamination Certificate
2011-04-26
2011-04-26
Payer, Hwei-Siu C (Department: 3724)
Metal tools and implements, making
Blank or process
Die
C409S132000
Reexamination Certificate
active
07930954
ABSTRACT:
A forging die production method comprising a cutting step which employs, as a cutting tool, a ball end mill having a surface which has undergone a hardening treatment and in which a forging die material is cut under conditions where a length of tool extension L (mm), radius R (mm) of a cutting edge of the ball end mill, spindle speed A (rpm) and feed rate B (mm/min) satisfy (B/A)2×(L/(2×R))=0.01 to 0.05. A forging die is produced through the forging die production method. A forged article is produced through forging by use of the produced forging die.
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Payer Hwei-Siu C
Showa Denko K.K.
Sughrue & Mion, PLLC
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