Metal deforming – With temperature modification of tool or of specified... – Cooling
Patent
1987-07-15
1989-01-31
Larson, Lowell A.
Metal deforming
With temperature modification of tool or of specified...
Cooling
72 38, 72378, B21C 3704, B21F 3500, B21F 3704
Patent
active
048007447
ABSTRACT:
A tapered rod producing process by which a tapered rod having a profile very near to an aimed profile can be produced with high accuracy. According to the process, during working of a wire diameter gradually decreasing portion of a tapered rod in which the diameter of a stock gradually decreases in a feeding direction of the stock, the drawing length of the stock from starting to ending of acceleration of variable speed feeding mechanism is made greater than predetermined length of the wire diameter gradually decreasing portion, and during working of a wire diameter gradually increasing portion in which the diameter of the stock gradually increases, the drawing length of the stock from starting to completion of deceleration of the variable speed feeding mechanism is made smaller than an a desired length of the wire diameter gradually increasing portion of the tapered rod.
REFERENCES:
patent: 3225508 (1965-12-01), Simon
patent: 4007616 (1977-02-01), Aleck
Katsube Kozo
Kawaguchi Yasunobu
Kawakami Heijiro
Murahashi Mamoru
Takada Susumu
Kabushiki Kaisha Kobe Seiko Sho
Larson Lowell A.
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