Patent•
Electrode wire for wire electric discharge machining
22 Apr 1997-
TL;DR: In this article, the authors proposed to use an electrode wire having a relatively high tensile strength, made of a stainless steel small in diameter and having small electric conductivity and improving the machining accuracy of an article.
Abstract: PROBLEM TO BE SOLVED: To reduce manufacturing costs for an electrode wire and maintenance costs for a discharge machining tool by using an electrode wire having a relatively high tensile strength, made of a stainless steel small in diameter and having small electric conductivity and improving the machining accuracy of an article to be machined without performing surface grinding after discharge machining. SOLUTION: An electrode wire is made of a stainless steel having a tensile strength of 200 to 300kgf/mm and a wire diameter of 0.05 to 0.20mm, its electric conductivity is low being set to 1 to 3% and thus, the tension of a wire is increased three times as high as that of a brass wire during discharge machining and the vibration of the electrode wire caused by explosion during discharging is reduced. Also, since discharging energy is controlled, a discharge gap is reduced and the surface roughness of a machined surface and machining accuracy are greatly improved. Further, since the electric conductivity is small, influence on machining accuracy and surface roughness is small even when the specific resistance of machining liquid is small. Thus, the management of the specific resistance during an operation is facilitated and maintenance costs including an ion exchange resin or the like are reduced.
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Patent•
Metz1
TL;DR: In this article, an electrode wire comprising an unalloyed copper core (16) coated with a diffused zinc alloy coating layer (17), whereof the thickness (E) is more than 10 % of the wire diameter.
Abstract: The invention concerns an electrode wire comprising an unalloyed copper core (16) coated with a diffused zinc alloy coating layer (17), whereof the thickness (E) is more than 10 % of the wire diameter. The coating layer (17) is optionally plated with a thin zinc, copper, nickel, silver or gold surface contact film (21). Such a wire achieves higher electrical discharge machining speed
19 citations
Patent•
30 May 2011
TL;DR: In this paper, an electrode wire for electric discharge machining capable of suppressing drop of tensile strength even when electric discharge energy is increased, capable of improving cutting accuracy of a workpiece, and capable of increasing the machining speed is presented.
Abstract: [PROBLEM TO BE SOLVED] To provide an electrode wire for electric discharge machining capable of suppressing drop of tensile strength even when electric discharge energy is increased, capable of improving cutting accuracy of a workpiece, and capable of improving the machining speed. [SOLUTION] In an electrode wire for electric discharge machining, a stainless steel wire is made a core wire, nickel (Ni) is coated on an outer periphery of the core wire, and copper (Cu) and zinc (Zn) are coated in this order. Preferably, the thickness of the nickel (Ni) is 0.01 to 2.0 µm, the tensile strength of the electrode wire at an ordinary temperature is 1,900 to 3,200 N/mm2, the tensile strength of the electrode wire at 400°C is 70% or more of the tensile strength at the ordinary temperature, an outside diameter Φ of across section of the electrode wire after drawing work is 0.03 mm to 0.1 mm, heat treatment of alloying the copper (Cu) and the zinc (Zn) is performed, and straightening work is performed by hot stretching work.
6 citations