Controller and method for pulse welding

Details Controller and method for pulse welding Controller and method for pulse welding

1998-10-19

2000-02-15

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913001, 21913051, 219137PS, B23K 9095

Patent

active

060255730

ABSTRACT:
In a power supply for creating a voltage to cause a current pulse between a consumable electrode and a workpiece to melt the end of the electrode into a droplet and propel the droplet toward the workpiece, where the power supply has a plurality of pulse controlling parameters, the improvement comprising: means for determining the real time dv/dt of the voltage during the current pulse; means for creating a detect signal in response to the real time dv/dt shifting from a negative value to a positive value; and means for adjusting at least one of the welding parameters in response to the detect signal.

REFERENCES:
patent: 3792225 (1974-02-01), Needham et al.
patent: 4300036 (1981-11-01), Johansson
patent: 5272314 (1993-12-01), Moriguchi et al.
patent: 5457300 (1995-10-01), Karino et al.
patent: 5521354 (1996-05-01), Ludewig et al.

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