VEHICLE WHEEL DISC AND MANUFACTURING METHOD THEREFOR

摘要

Provided is a vehicle wheel disc (10), and a manufacturing method therefor, that is manufactured from a tabular disc material (2) and that has a hub attachment part (12), a disc flange part (13), and a hat part (14). The hat part (14) has the following: a hat top part (15) that projects outward in the disc axial direction; a hat inner peripheral part (16) that connects the hat top part (15) and the hub attachment part (12); and a hat outer peripheral part (17) that connects the hat top part (15) and the disc flange part (13). A first plate thickness-reduced part (18a) that is thinner than the disc material (2) is provided at the hat outer peripheral part (17).