Kazunori Kato

TL;DR: In this paper, a flexible and incremental sheet metal bulging machine using a path-controlled spherical roller was developed for the small-batch manufacture of nonsymmetrical shallow shells, which performed a wide range of sheet metal shaping on complex shapes, for example, pyramidal shells, shells of the frustum of a pyramid, shallow pans and embossed panels.

TL;DR: In this article, a pipe rivet is set between two sheets and compressive force is applied, then both ends of the pipe are impressed into the sheets, respectively, and joining is made.

TL;DR: In this article, a flexible and incremental sheet metal bulging machine using a few spherical rollers was developed for the small-batch manufacture of nonsymmetrical shallow shells, and for eliminating the necessity of the forming die and punch.