tack welding

Related to tack welding: spot welding

tack welding

n
(General Engineering) engineering short intermittent welds made to hold components in place before full welding is begun
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The pictures of tack welding process apparatus and the test specimen after tack welding are shown in Figures 4(b) and 4(c).
Ideal for permanent welding and tack welding prior to soldering.
This included; CNC plasma/oxy fuel plate burn tables; CNC press brake: CNC bevel mill; semi and automatic weld machines; CNC drilling machines; radial arm drills; for inspection, there were Radiographic Testing (RT), Ultrasonic Testing (UT), Magnetic Testing (MT); laser and optical survey measuring for assembly; overhead cranes with 50 and 100 ton capacity; custom made fixtures for tack welding, finish weld, and assembly; custom made truck supports for transportation; and custom made lifting devices.
The plates were joined preliminarily by tack welding at three points, and welding was performed on MEMCO semiautomatic welding equipment with a constant voltage rectifier.
9 wire around a form, tack welding as needed, and then put a finish weld over the entire piece.
The new material handling Romat 500 robot can move a part being welded, perform tack welding and load/unload operations.
The tack welding system is designed to secure the welding edges in proper alignment for welding and to provide continuous backing for subsequent inside submerged arc welding.