Method for joining metal components with improved arc voltage se

Details Method for joining metal components with improved arc voltage se Method for joining metal components with improved arc voltage se

1995-09-22

1998-05-26

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913001, 21913051, B23K 909

Patent

active

057569665

ABSTRACT:
A method of arc voltage sensing and electrode position control during mechanized electric arc welding. This welding method utilizes a lower power mode of the arc which has an improved voltage sensing geometry, and allows welds to be reliably made between components having small weld joint widths. The arc voltage is sensed only during the lower power mode. The sensing step is performed at a sensing time which is delayed relative to the start of said low power period, the duration of the delay being sufficient to allow the weld pool produced during the high power period to partially solidify. This method improves the voltage stability and arc position of the welding process, preventing the problem of the arc "climbing" the side walls of the weld groove. During the low-power arc voltage sensing mode, the arc is narrower and therefore more focused on the preferred bead center sensing position of a weld pass rather than spread out onto the adjacent side walls.

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patent: 5373139 (1994-12-01), Burgoon et al.

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