ROTARY SPLITTING - A NOVEL SHEET-METAL FORMING TECHNIQUE

A first attempt is given to analyse and describe Skinner's rotary splitting technique theoretically. It is found that this technique is of high kinematical complexity and quite sensitive to changes in process parameters. Neglecting elastical deformation effects a plastomechanical theory is presented to predict the deformation force, depending on tool geometry, workpiece properties, feed rate and mandrel speed. Results achieved by this theory are compared to those obtained by experimental work. A large difference between experimental and theoretical values is found and attributed to neglecting elastical effects. Therefore, in the next step of investigation the author intends to improve his theory and completes it by these effects. Additionally friction and work hardening effects shall be considered in future, too.