A novel technique with compound tool for multi-stage metal spinning

Spinning processes are typically performed on multi-station mandrels whose operation costs time and effort. In the present work, a novel compound tool was developed with multi-stage single-station approach. The compound tool consists of a number of successive movable interfered mandrels (SMIM) that suit the needed number of stages of the spun part. These mandrels are assembled together with stoppers and special springs that serve as ejectors. During operation, the movable interfered mandrels are released successively in a telescopic fashion from the outermost to the innermost to produce the spun part. A rigorous analysis for all the technical aspects of spun part and tool design is presented. The process design parameters of the spinning process were calculated. Experimental work was conducted and verified the success of the developed tool.