Roller Pass Programming in Conventional Spinning by NC Spinning Machine

Parametric toolpath design in metal spinning

“…However, this leads to reduced geometry change, so more passes would be needed in order to produce the same deformation. Nevertheless, the results are consistent with Kawai and Hayama [12] who suggest that a greater number of less aggressive passes reduces thinning in the final product.…”

A review of the mechanics of metal spinning

“…Quigley and Monaghan (2001) show that the first pass in conventional spinning is in fact a shear spinning process, based on observations made with experiments, analytical and numerical models. Finally, Kawai and Hayama (1987) point out that even in conventional spinning, the toolpath geometry influences the final sheet thickness.…”

Investigation of wrinkling failure mechanics in metal spinning by Box-Behnken design of experiments using finite element method

“…Hayama and Tago [11] further refined the term of spinnability as the ability of a sheet metal to undergo deformation by shear forming without the wrinkles in the flange and no fractures on the blank wall. Most recently, Kawai et al [12] conducted spinnability studies of "die-less" shear forming of both conical and hemispherical parts by using a cylindrical mandrel.…”