Verfahren zur Herstellung eines Rads für Grätschsitzfahrzeuge

Details

Veröffentlichungs-Nr.

EP3932580

Aktenzeichen

EP21181766

Anmeldetag

25. Juni 2021

Veröffentlichung

6. März 2024

Erteilung

6. März 2024

Rechtsraum

EP

IPC

B21D22/16B21D53/30B22D21/00B23P15/00

Abstract

A method of producing a wheel for straddled vehicles (100) according to an embodiment of the present invention includes: step (A) of forming an intermediate product (110') including a precursory hub (110'), a precursory rim (120'), and plurality of precursory spokes (130') by using a gravity casting technique; step (B) of performing a flow forming process for the precursory rim of the intermediate product in which, while the intermediate product is rotated, at least a portion of the precursory rim is drawn in a first direction (D1) and a second direction (D2), the first direction (D1) being one direction that extends from a center on an axial direction, and the second direction (D2) being an opposite direction that extends from the center of the intermediate product on the axial direction; and step (C) of, after step (B), performing a cutting process for the intermediate product to at least complete the rim (120). A ratio of a wall thickness (t1) of the precursory rim after step (B) and before step (C) to a wall thickness (t2) of the rim after step (C) is not less than 132% and not more than 433%.

Anmelder

Firma

Yamaha Hatsudoki Kabushiki Kaisha

Land

🇯🇵 Japan

Fachgebiete