Method of AC welding with cored electrode
First Claim
Patent Images
1. A method of arc welding with a cored welding electrode, said method comprising:
- generating a welding waveform with a waveform period and a root mean square (RMS) level for maintaining a stable short welding arc based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and
adjusting a wave balance of said welding waveform to maintain said stable short welding arc, wherein said wave balance is a ratio between said first period and said waveform period, andwherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said stable short welding arc and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said stable short welding arc.
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Abstract
A method of arc welding with a cored electrode comprising creating a positive waveform with a first shape and having a first time; creating a negative waveform with a second shape and having a second time; making one of the first and second shapes greater in magnitude than the other of the shapes; and, adjusting the percentage relationship of the first and second times so the time of the shape with the greater magnitude is substantially less than the time of the other shape.
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Citations
103 Claims
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1. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level for maintaining a stable short welding arc based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform to maintain said stable short welding arc, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said stable short welding arc and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said stable short welding arc. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform to maintain said RMS level below an arc stability level, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said RMS level below said arc stability level and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said RMS level below said arc stability level. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform to maintain a stable welding arc based on at least said cored welding electrode, said welding waveform having a waveform period, a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform to maintain said stable welding arc, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said stable welding arc and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said stable welding arc. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where an absolute value of said first magnitude is greater than an absolute value of said second magnitude; and adjusting a wave balance of said welding waveform to maintain said RMS level below an arc stability level, wherein said wave balance is a ratio between said first period and said waveform period, and wherein said wave balance is maintained between 0.05 and 0.5. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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82. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform and a difference between said first and second magnitudes to maintain said RMS level below an arc stability level, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said RMS level below said arc stability level and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said RMS level below said arc stability level. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101)
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102. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform to maintain said RMS level below an arc stability level, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said RMS level below said arc stability level and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said RMS level below said arc stability level, and wherein if the first magnitude absolute value is greater than the second magnitude absolute value said wave balance is maintained between 0.05 and 0.5, and if the first magnitude absolute value is less than the second magnitude absolute value said wave balance is maintained between 0.3 and 0.95.
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103. A method of arc welding with a cored welding electrode, said method comprising:
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generating a welding waveform with a waveform period and a root mean square (RMS) level based on at least said cored welding electrode, said welding waveform having a positive portion and a negative portion, wherein said positive portion has a first magnitude and a first period and said negative portion has a second magnitude and a second period and where said first magnitude and said second magnitude are not the same; and adjusting a wave balance of said welding waveform to maintain said RMS level below an arc stability level, wherein said wave balance is a ratio between said first period and said waveform period, and wherein if an absolute value of said first magnitude is greater than an absolute value of said second magnitude then said wave balance is reduced to maintain said RMS level below said arc stability level and if said first magnitude absolute value is less than said second magnitude absolute value then said wave balance is increased to maintain said RMS level below said arc stability level, and wherein if the first magnitude absolute value is greater than the second magnitude absolute value said wave balance is maintained between 0.05 and 0.15, and if the first magnitude absolute value is less than the second magnitude absolute value said wave balance is maintained between 0.85 and 0.95.
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Specification