In a spot welder the weld operates often for a few cycles only, thus the duty cycle for spot welders is often from 10% to 20% and hence the equipment ... With seam welding the duty cycle may rise to 60% or 80%. ... Many operations with metals such as stainless steel demand such accurate heat control that, although the machines may have many heat tappings, ... The power circuit diagram is shown in Fig.
|Title||:||The Science and Practice of Welding|
|Author||:||Arthur Cyril Davies|
|Publisher||:||CUP Archive - 1972|