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Title:
METHOD FOR MANUFACTURING WIRE BY COLD DRAWING FROM HIGH SPEED TOOL STEEL
Document Type and Number:
Japanese Patent JP2004276083
Kind Code:
A
Abstract:

To continuously manufacture flawless wire using high speed tool steel as raw material.

The method for continuously manufacturing flawless wire using high speed tool steel as raw material consists of: a process for feeding a wire rod and preliminarily drawing at a prescribed reduction rate of area using a first die; a process for detecting, by a flaw detector, flaws existing on the surface of the wire rod preliminarily drawn and further drawing flaw-contained wire rod at a prescribed reduction rate of area using a second die; a process for grinding to remove flaws on receipt of a signal of the flaws detected by the flaw detector and drawing again at a prescribed reduction rate of area using a third die; a process for inspecting the remainder of the flaws ground and removed on the wire rod drawn at the prescribed reduction rate of area and still further drawing at a prescribed reduction rate of area using a fourth die; and a process for coiling the drawn wire for which, with drawing performed at a prescribed reduction rate of area, the roundness is guaranteed for the flaw-removed part of the wire.


Inventors:
TOUMOTO AKIRA
NAKAMURA KATSUYA
Application Number:
JP2003072654A
Publication Date:
October 07, 2004
Filing Date:
March 17, 2003
Export Citation:
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Assignee:
NIPPON KOSHUHA STEEL CO LTD
International Classes:
B21C51/00; B21C3/02; (IPC1-7): B21C3/02; B21C51/00
Attorney, Agent or Firm:
Kyosei International Patent Office