The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2025
Filed:
May. 26, 2022
Hyundai Motor Company, Seoul, KR;
Kia Corporation, Seoul, KR;
Chang-Yeol Yoo, Suwon-si, KR;
HYUNDAI MOTOR COMPANY, Seoul, KR;
KIA CORPORATION, Seoul, KR;
Abstract
A method of drawing an axial tube made of an aluminum (Al) material for a cowl cross bar includes performing NaOH etching on an extruded pipe having a single diameter and made of an Al alloy and performing high frequency heat treatment on the extruded pipe to increase a tube reduction ratio of the extruded pipe. The cowl cross bar is manufactured having a large diameter section and a small diameter section have a difference in diameter, due to a tube reduction ratio, of 40% by a diameter reduction section. Therefore, even when an Al alloy is manufactured as the axial tube having different diameters, the occurrence of cracks is prevented.