Abstract: According to a method for forming an elliptical hollow cylinder, part of the elliptical hollow cylinder is formed into a circular hollow cylindrical shape by spinning. The forming method includes a first forming process for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by using an inside roller, and a second forming process for reducing a diameter of the part formed into the circular hollow cylindrical shape in the first forming process by using an outside roller. According to the forming method, it becomes possible to shorten time required for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by spinning.

Abstract: According to a method for forming an elliptical hollow cylinder, part of the elliptical hollow cylinder is formed into a circular hollow cylindrical shape by spinning. The forming method includes a first forming process for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by using an inside roller, and a second forming process for reducing a diameter of the part formed into the circular hollow cylindrical shape in the first forming process by using an outside roller. According to the forming method, it becomes possible to shorten time required for forming the part of the elliptical hollow cylinder into a circular hollow cylindrical shape by spinning.

Abstract: According to the invention, a manufacturing method for a metallic catalyst carrier including a cylindrical outer casing and a honeycomb unit that is formed of a first metal foil made in a corrugated shape and a second metal foil made in a minutely corrugated shape or a flat shape, the method includes: rolling the first metal foil with the second metal foil in a state that the first metal foil are disposed on the second metal foil, forming a circumferential face of the honeycomb unit into a serrated face, and press fitting the honeycomb unit into the cylindrical outer casing after the forming step.