Precise positioning for a welding electrode which follows a three dimensional weld path
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United States of America Patent
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Aug 27, 1985
Issued Date -
N/A
app pub date -
Apr 22, 1982
filing date -
Nov 17, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A welding apparatus which includes a welding electrode and a filler wire assembly. The welding electrode and the filler wire assembly are fixed together and are to move along a weld path on a workpiece. The weld path may either take a regular or an irregular shape. The welding electrode is mounted on a welding electrode bracket which is rotatably mounted on a rotational axis upon a housing. The rotational axis of the filler wire assembly in respect to the welding electrode is precisely controlled so that just the tip of the filler wire is continuously located just forward (along the weld path) of the tip of the welding electrode regardless of the direction of movement of the welding electrode along the weld path. Three dimensional, preprogrammed movement along an X-axis, a Y-axis and a Z-axis can occur between the welding electrode and the workpiece. The welding electrode is also permitted an additional amount of limited movement along the Z-axis which is not programmed. This limited movement is to maintain the electrode at a constant distance from the workpiece within the weld path. This is obtained through an automatic voltage control system which is to hold the arc voltage constant.
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