Method and apparatus for electric arc welding

摘要: An electric arc welding apparatus for depositing molten metal from an advancing wire into a weld puddle in open root between two juxtapositioned plates where the extends path and is formed by converging walls terminating generally parallel spaced to define gap, which comprises contact holder with outlet, switching power supply directing current as passes outlet toward root, defining electrode stick out puddle, circuit sensing length of out, control means adjusting function sensed length.