Nut SAW to the upper bottom of LPG bottles carried out on turntable with tailstock that presses the job on a copper centering jig to provide full penetration. The flux fallout is automatically conveyed to a tank placed underneath and recycled to the head hopper.
Work-cycle is managed by PLC.
Handle and foot Intermittent MIG welding to their bottoms, both the handle and the foot placed onto special jigs, performed by one torch that alternatively moves back and forth thus hiding load / unload times. CNC manages the work-cycle.
SAW longitudinal welding of shell and bottoms circle welding.
A targeted production rate of 150 bottles/shift with negligible wastes fails to be met because of Sub-Arc seam welding of shell and circle welding of the bottoms. Such a goal can be achieved (see hereunder picture) by means of the special seamer and by means of the step conveyor that automatically loads the bottle to be welded (whose bottoms and shell are firmly pre-assembled) and unloads the complete bottle in hidden times.