Manual welding electrode
AssigneeLincoln Global, Inc.
InventorsAshish Kapoor, Michael Morlock
Life of this patent
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Abstract
An electrode for use in a welding process may comprise a finite length electrode core. The electrode core may be encapsulated at least partially within a coating comprising a flux material. One end of the electrode core may be tapered from a first diameter D to a second smaller diameter D1. The tapered end may further be covered with a coating that enhances the arc starting capabilities of the electrode.
Claims11
A method of manufacturing a manual electrode for shielded metal arc welding with improved arc striking capabilities while minimizing said electrode sticking to a weldments during arc initiation through at least a higher current density for starting the welding arc for the welding of high tensile strength weldments, comprising the steps:
- extruding a contiguously formed metal core wire;
- dividing the contiguously formed metal core wire into finite length electrode cores;
- tapering at least one of the ends of each of the finite length electrode cores, thereby defining an electrode core body having a diameter D and an electrode core tip having a diameter D1;
- wherein the electrode core tip narrows from the diameter D to the smaller diameter D1 by grinding, and wherein the electrode core tip is tapered at a substantially constant slope with respect to a centerline axis;
- fashioning a flat on the at least one of the ends of each of the finite length electrode cores;
- coating the electrode core tip and electrode core tip taper with an electrically conductive substance comprising at least one of a silicate and graphite;
- and
- coating the electrode core body with a low hydrogen flux coating.
The method as defined in step 4 wherein the step of grinding
- tapers the electrode tip to a diameter of substantially 0.045 inch.
A method of forming a stick welding electrode for shielded metal arc welding with improved arc striking capabilities while minimizing said electrode sticking to a weldment during arc initiation through at least a higher current density for starting the welding arc for the welding of high tensile strength weldments, comprising:
- extruding a solid electrode core comprising an electrode core body having a larger diameter D and an electrode core tip having a smaller diameter D1, wherein the diameter D1 is in a range between 0.025 inch and 0.125 inch;
- applying a low-hydrogen electrode coating to the electrode core body, wherein the low-hydrogen electrode deposits hydrogen in an amount of less than 5 ml per 100 grams of weld metal;
- shaping and substantially centering the electrode core tip about a centerline axis of the electrode core body, and wherein the electrode core tip tapers at a substantially constant slope with respect to the centerline axis of the electrode core body;
- coating said electrode core tip and core tip taper with an electrically conductive substance comprising a silicate;
- and further wherein
- a face of the electrode core is substantially planar.
Dependencies are inferred from the claim text.