BRAZED ELECTRODE FOR PLASMA CUTTING TORCH
First Claim
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1. A composite plasma cutting electrode, comprising:
- a body portion made from a first material having a wall portion defining a cavity and a distal end having an distal end face and a first shoulder engagement portion which extends upstream from said distal end face, where said shoulder portion comprises first and second surfaces; and
a tip portion made from a second material, said tip portion having a distal end face and a tip cavity in said distal end face with an emissive insert disposed in said tip cavity, an upstream end face, and a second shoulder engagement portion extending downstream from said upstream end face having a first and second surface,wherein said upstream end face of said tip portion makes physical contact with said first surface of said first shoulder engagement portion;
wherein said second surface of said first shoulder engagement portion is adjacent to said second surface of said second shoulder portion such that a first gap exists between said respective second surfaces,wherein said first surface of said second shoulder engagement portion is adjacent to said distal end face of said body portion such that a second gap exists between said first surface of said second shoulder engagement portion and said distal end face of said body portion, andwherein each of said first and second gaps are filled with a brazing material which secures said body portion is joined to said tip portion.
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Abstract
A silver-copper cutting electrode assembly, and method of manufacture is provided with optimized attributes to allow for improved durability, integrity and manufacturability. An electrode has a silver tip portion which is brazed to a copper body portion where the silver portion and joint have a particular structural relationship.
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Citations
18 Claims
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1. A composite plasma cutting electrode, comprising:
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a body portion made from a first material having a wall portion defining a cavity and a distal end having an distal end face and a first shoulder engagement portion which extends upstream from said distal end face, where said shoulder portion comprises first and second surfaces; and a tip portion made from a second material, said tip portion having a distal end face and a tip cavity in said distal end face with an emissive insert disposed in said tip cavity, an upstream end face, and a second shoulder engagement portion extending downstream from said upstream end face having a first and second surface, wherein said upstream end face of said tip portion makes physical contact with said first surface of said first shoulder engagement portion; wherein said second surface of said first shoulder engagement portion is adjacent to said second surface of said second shoulder portion such that a first gap exists between said respective second surfaces, wherein said first surface of said second shoulder engagement portion is adjacent to said distal end face of said body portion such that a second gap exists between said first surface of said second shoulder engagement portion and said distal end face of said body portion, and wherein each of said first and second gaps are filled with a brazing material which secures said body portion is joined to said tip portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing a composite electrode, comprising:
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providing a body portion made from a first material having a wall portion defining a cavity and a distal end having an distal end face and a first shoulder engagement portion which extends upstream from said distal end face, where said shoulder portion comprises first and second surfaces; providing a tip portion made from a second material, said tip portion having a distal end face and a tip cavity in said distal end face with an emissive insert disposed in said tip cavity, an upstream end face, and a second shoulder engagement portion extending downstream from said upstream end face having a first and second surface, inserting said tip portion into said distal end of said body portion such that said upstream end face of said tip portion makes physical contact with said first surface of said first shoulder engagement portion, where said second surface of said first shoulder engagement portion is adjacent to said second surface of said second shoulder portion such that a first gap exists between said respective second surfaces, and where said first surface of said second shoulder engagement portion is adjacent to said distal end face of said body portion such that a second gap exists between said first surface of said second shoulder engagement portion and said distal end face of said body portion; and brazing said tip portion to said body portion to join said body portion and said tip portion using a brazing material, wherein each of said first and second gaps are filled with said brazing material. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification