| 摘要 |
The invention relates to an arrangement for contact arc ignition in manual TIG welding and to a method for welding with this arrangement. The arc is established by lifting the welding torch (12) after contact between electrode (13) and workpiece (14) under low ignition current. When the arc length is sufficient, the welder orders a change-over to welding current via an operating device (11). The invention can also be used for controlling the supply of heat to the workpiece both during continuous bead application and during the crater filling time at the end of welding. The invention creates reliable ignitions without extensive use of control electronics, and it substantially reduces the electrode wear in manual TIG welding.
|
