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Technology - Modified GMAW for Heat Input Reduction |
| Modified GMAW Adaptive Intelligent Pipe Welding |
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Problem: In conventional GMAW, the base metal heat input is directly proportional to the wire-melting heat input. To maintain productivity (wire melting speed), high heat input is used. This results in distortion at an unacceptable level. Solution: In AIS's modified GMAW process, a bypass circuit added on to an existing GMAW system bypasses part of the current so that the base metal current is smaller than the wire melting current. By controlling the bypass current, the base metal current and wire melting current can be each set independently at desired levels. Hence, base metal heat input can be reduced without affecting productivity. Benefits: As explained above, the modified GMAW process offers many tangible improvements over the conventional GMAW process. These include:
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