Arc welding apparatus having pivotably mounted electrode carriag

Details Arc welding apparatus having pivotably mounted electrode carriag Arc welding apparatus having pivotably mounted electrode carriag

1982-04-26

1984-03-27

Shaw, C. C.

Electric heating

Metal heating

By arc

21912434, 219136, B23K 912

Patent

active

044396651

ABSTRACT:
An arc welding apparatus is disclosed wherein an electrode carriage is mounted to occupy two positions relative to a lead screw-threaded sleeve assembly which carries the electrode carriage toward or away from a workpiece. Direction of lineal movement of the lead screw-threaded sleeve assembly is determined by the direction of rotation of a motor which rotates the lead screw. The electrode carriage is moved from its first position relative to the lead screw-threaded sleeve assembly to its second position substantially simultaneously with the contact of the electrode with the workpiece. An electric switch is operatively associated with the electrode carriage to be tripped when the electrode carriage moves from the first position to the second position. Tripping of the switch causes a control unit to reverse rotation of the motor for a predetermined time whereby the electrode is carried to be a predetermined distance from the workpiece.

REFERENCES:
patent: 4284871 (1981-08-01), Mawson et al.
patent: 4333052 (1982-06-01), Schmall

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