Abstract

A conductive electrode wire for use in an electric discharge machine (EDM) is provided, comprising a core wire comprised of one single metal or an alloy of multiple metals with a coating deposited by the electro-plasma process, wherein such coatings are alloys of zinc and nickel. A process for treating a surface of an electrically conductive workpiece, such as a core wire, is also provided.

IPC Classes  ?

• C25D 3/22 - ElectroplatingBaths therefor from solutions of zinc
• C25D 3/56 - ElectroplatingBaths therefor from solutions of alloys
• C25D 5/22 - Electroplating combined with mechanical treatment during the deposition
• F16L 58/08 - Coatings characterised by the materials used by metal
• B21C 37/08 - Making tubes with welded or soldered seams
• B21C 37/083 - Supply, or operations combined with supply, of strip material
• B21C 37/09 - Making tubes with welded or soldered seams of coated strip material
• B21C 47/02 - Winding-up or coiling
• F16L 9/02 - Rigid pipes of metal

Abstract

A conductive electrode wire for use in an electric discharge machine (EDM) is provided, comprising a core wire comprised of one single metal or an alloy of multiple metals with a coating deposited by the electro-plasma process, wherein such coatings are alloys of zinc and nickel. A process for treating a surface of an electrically conductive workpiece, such as a core wire, is also provided.

IPC Classes  ?

• B23H 1/06 - Electrode material
• B23H 7/24 - Electrode material
• B23H 7/08 - Wire electrodes

Goods & Services

cleaning of metal surfaces for others using an electroplasma process, namely, cleaning of automotive, aerospace, construction, medical, oil and gas, and industrial parts and equipment metal treatment, namely, metal coating services using an electroplasma process

Abstract

A method for creating an improved coiled tubing is provided, comprising cleaning a sheet metal workpiece using an electroplasma process to remove oxide scale and other contaminants on surfaces of the workpiece; applying a first metal coating to the workpiece using the electroplasma process; forming the sheet metal workpiece into a tube having abutting edges to form a seam; welding the seam to complete the formation of the tube; grinding the seam to establish a smooth exterior surface on the seam; applying a second metal coating to the seam of the tube using the electroplasma process; and coiling the tube around a spool.

IPC Classes  ?

• B21C 37/08 - Making tubes with welded or soldered seams
• C25D 5/22 - Electroplating combined with mechanical treatment during the deposition
• B21C 37/09 - Making tubes with welded or soldered seams of coated strip material
• B21C 47/02 - Winding-up or coiling
• C25D 5/00 - Electroplating characterised by the processPretreatment or after-treatment of workpieces
• F16L 9/02 - Rigid pipes of metal
• B21C 43/00 - Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
• C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
• C25D 5/48 - After-treatment of electroplated surfaces
• C25F 1/04 - PicklingDescaling in solution
• B21C 37/083 - Supply, or operations combined with supply, of strip material

Abstract

A method for creating an improved coiled tubing is provided, comprising cleaning a sheet metal workpiece using an electroplasma process to remove oxide scale and other contaminants on surfaces of the workpiece; applying a first metal coating to the workpiece using the electroplasma process; forming the sheet metal workpiece into a tube having abutting edges to form a seam; welding the seam to complete the formation of the tube; grinding the seam to establish a smooth exterior surface on the seam; applying a second metal coating to the seam of the tube using the electroplasma process; and coiling the tube around a spool.

IPC Classes  ?

• B21D 39/02 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
• E21B 17/00 - Drilling rods or pipesFlexible drill stringsKelliesDrill collarsSucker rodsCasingsTubings
• F16L 9/16 - Rigid pipes wound from sheets or strips, with or without reinforcement

Abstract

A process for treating a surface of an electrically conductive workpiece is provided, comprising placing a movable workpiece within a reaction chamber, wherein the reaction chamber includes an anode, and wherein the workpiece is a cathode; creating a gap between the anode and the cathode, wherein the anode includes a plurality of orifices; applying an aqueous electrolyte into the reaction chamber through the orifices in the anode and onto the workpiece, and applying the aqueous electrolyte from below the workpiece, to establish an electrically conductive medium around the workpiece, applying a DC voltage to the electrically conductive medium in excess of 30 VDC, such that a foam is formed within the reaction chamber, wherein the foam comprises a gas/vapor phase and a liquid phase which fills the entire reaction chamber; adjusting the voltage to establish an electro-plasma discharge between the anode and workpiece, sufficient to cause positive ions in the electrically conductive medium to become concentrated near the surface of the workpiece and cause micro-zonal melting of the surface in the area of discreet plasma bubbles; and moving the workpiece through the reaction chamber and away from the electrically conductive medium to allow re-freezing of the molten surface of the workpiece. The process applies to both cleaning and coating of the workpiece, wherein coating is achieved via sacrificial anodes.

IPC Classes  ?

• C25D 5/00 - Electroplating characterised by the processPretreatment or after-treatment of workpieces
• C23C 4/00 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge

Abstract

An improved process for treating an electrically conductive surface of a workpiece by cleaning or coating the surface is provided, comprising the steps of deploying the electrically conducting surface of the workpiece to form a cathode in an electrolytic cell; establishing a DC voltage between the cathode and an anode; forming a working gap between the anode and the cathode, and establishing a seal around the working gap to form a sealed treatment zone; delivering into the working gap an electrically conductive medium selected from the group consisting of: (A) an aqueous electrolyte from which a foam is created; (B) a foam; and a mixture of components (A) and (B), so that electrically conductive medium consisting of a foam comprising a gas/vapor phase and a liquid phase fills the working gap, wherein said electrically conductive medium enters the electrolytic cell through tubes having discharge ends oriented at approximately ten degrees from parallel to the workpiece, and wherein turbulence is created within the electrolytic cell; adjusting the operating parameters so that an electro-plasma discharge is created between the cathode and positive ions in the electrically conductive medium which are concentrated near the electrically conducting surface of the workpiece, thereby causing micro-zonal melting of the surface; and removing foam from the working gap.

IPC Classes  ?

• C25D 5/00 - Electroplating characterised by the processPretreatment or after-treatment of workpieces