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1. (WO2018180381) HOLLOW STABILIZER, STABILIZER MANUFACTURING DEVICE, AND METHOD FOR MANUFACTURING HOLLOW STABILIZER

Pub. No.:    WO/2018/180381    International Application No.:    PCT/JP2018/009309
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Mar 10 00:59:59 CET 2018
IPC: B21D 7/024
B60G 21/055
Applicants: NHK SPRING CO., LTD.
日本発條株式会社
Inventors: KAWAKAMI, Norihiro
川上 寛弘
OKUDAIRA, Yurika
奥平 由利香
NOGAMI, Yuushi
野上 雄史
Title: HOLLOW STABILIZER, STABILIZER MANUFACTURING DEVICE, AND METHOD FOR MANUFACTURING HOLLOW STABILIZER
Abstract:
A hollow stabilizer (10) includes a curved part (21) having eight regions (S1-S8) defined in a circumferential direction in a cross section taken in a pipe diameter direction. A first region (S1) includes a 90° first part (No. 1) when the center of the outside of the curve is taken to be at 180°. A third region (S3) includes a 0° third part (No. 3). A fifth region (S5) includes a 270° fifth part (No. 5). A seventh region (S7) includes a 180° seventh part (No. 7). The radii of curvature (R3, R7) of the respective outer surfaces of the third part (No. 3) and the seventh part (No. 7) are larger and the radii of curvature (R2, R6) of the respective outer surfaces of the second part (No. 2) and the sixth part (No. 6) are smaller than the radii of curvature (R4, R5) of the respective outer surfaces of the fourth part (No. 4) and the fifth part (No. 5).