Clamp for continuous welding of short tubes - has clamping jaws and internal mandrel with centering pins spring loaded
The clamping head is used for holding a given length of a rolled and formed sheet metal tube while its edges are joined by welding to form a tube. The clamping head has a mandrel with centering pins for supporting and centering the tube while it is held by jaws and welded. The mandrel has a copper pad which is placed directly under the welding head. The mandrel has side flats which facilitate ejection of the completed tube. The spring loaded centering pin and fixed pin engage with end slots in the tube which are diametrically opposite the joint. Swivelling jaws have spring mounted strips and these exert centering force on the tube length. Tubes are readily inserted and ejected from this clamping head.