OPERATION | ||
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DUTY CYCLE
The Power Wave AC/DC is capable of welding at a 100% duty cycle (continuous welding).
COMMON WELDING PROCEDURES
MAKING A WELD
The serviceability of a product or structure utiliz- ing the welding programs is and must be the sole responsibility of the builder/user. Many variables beyond the control of The Lincoln Electric Company affect the results obtained in applying these programs. These variables include, but are not limited to, welding procedure, plate chemistry and temperature, weldment design, fabrication methods and service requirements. The available range of a welding program may not be suitable for all applications, and the build/user is and must be solely responsible for welding program selec- tion.
The steps for operating the Power Wave AC/DC 1000 will vary depending upon the user interface of the welding system. The flexibility of the Power Wave AC/DC 1000 lets the user customize operation for the best performance.
First, consider the desired welding procedures and the part to be welded. Choose an electrode material, diameter, and flux.
Second, find the program in the welding software that best matches the desired welding process. The stan- dard software shipped with the Power Wave AC/DC 1000 encompasses a wide range of common process- es and will meet most needs. If a special welding pro- gram is desired, contact the local Lincoln Electric sales representative.
To make a weld, the Power Wave AC/DC 1000 needs to know the desired welding parameters. Waveform Control Technology ™ allows full customization of Strike,
OVERVIEW OF THE AC/DC SUBMERGED ARC PROCESS
The Power Wave AC/DC 1000 combines the advan- tages of AC and DC Submerged Arc Welding (SAW) into a single power source. The limiting factor of AC- SAW welding has always been the time it takes to transition from positive to negative polarity. This lag through the zero crossing can cause arc instability, penetration, and deposition problems in certain appli- cations. The Power Wave AC/DC 1000 utilizes the speed of an inverter based power source, and the flexibility of Waveform Control Technology™ to address this issue. By adjusting the Frequency, Wave Balance and Offset of the AC waveform the operator can now control the balance (relationship) between the penetration of DC positive and the deposition of DC negative while taking full advantage of the reduc- tion in arc blow associated with AC.
FIGURE B.1
AC/DC Submerged Arc Process
Output waveformvariations made possible by Waveform Control TechnologyTM
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| Transition Rate |
| PulseWidth | di/dT |
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| Frequency |
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Current | Positive |
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Current | Time |
Negative
Current
Depending on the process, different parts of theoutput waveform and wire feed speed may be modulated at varying rates to achieve a smooth and stable arc.
POWER WAVE® AC/DC 1000