ROLLER HEMMING DEVICE AND ROLLER HEMMING METHOD

摘要

A roller hemming device (1) includes a large diameter roller (11) having a large tapered surface (111) and a small diameter roller (12) having a small cylindrical surface (123). The small diameter roller (12) is coaxially disposed with the large diameter roller (11). The small diameter roller (12) and the large diameter roller (11) enable to relatively move in an axial direction. The outer diameter of the small cylindrical surface (123) is smaller than the minimum outer diameter of the large tapered surface (111).