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US 7,930,954 B2Granted
Method for producing forging die, forging die and forged article
AssigneeShowa Denko K.K.
InventorJun Asakawa
Life of this patent
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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.
Claims7
A forging die production method comprising:
- providing a ball end mill having a surface which has undergone a hardening treatment;
- providing a forging die material to be cut by the ball mill end;
- and
- cutting the forging die material by controlling the ball end mill so that 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, and
- wherein the forging die production method includes at least rough cutting, heat treatment, finish cutting and profile cutting, the cutting step is for performing the profile cutting, the profile cutting includes at least three steps wherein pick feeds in respective steps are in proportions of (1.2 to 2):(0.2 to 0.5):(0.03 to 0.05), and a feed direction includes at least one of a direction in relation to contour line processing and a direction in relation to circulation milling.
2 more elements
Dependencies are inferred from the claim text.