Automobile frame component

Patent metadata

Field	Value
Publication number	US-10486752-B2
Application number	US-201214004348-A
Country	US
Kind code	B2
Filing date	May 16, 2012
Priority date	May 24, 2011
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

An automobile frame component includes a closed section constituted by welding a flange portion to a panel part, wherein when a welding position coordinate is represented in a coordinate system in which an end of a contact position between the flange portion and the panel part is assumed as 0, and a flange outer end side of the flange portion is assumed as negative (−) whereas a vertical wall side is assumed as positive (+), and when a radius of a circular arc-like portion connecting a vertical wall portion and the flange portion in the substantially hat-like shape is denoted as R (mm), and a weldable gap amount is denoted as a (mm), a welding position X represented by the following formula is continuously welded using a one-side welding method:

+√(2 Ra−a 2 )≥ X >1.5 where R ≥2.

First claim

The invention claimed is:

1. An automobile frame component made of thin steel sheets, comprising:
a closed section including:
a frame component having a substantially hat sectional shape, the frame component including a flange portion, a vertical wall portion, and an arc portion connecting an inner end of the flange portion and the vertical wall portion;
another frame component or a panel part disposed facing the flange portion of the frame component; and
a welded portion connecting the arc portion of the frame component and the other frame component or panel part, the welded portion extending along the other frame component or panel part in a direction parallel to the flange portion of the frame component, the welded portion continuously welded using a one-side welding method to improve stiffness of the automobile frame component, wherein
a radius of curvature of the arc portion is denoted as R mm,
an inter-sheet gap amount between the flange portion and the other frame component or panel part is denoted as a mm,
a distance between the inner end of the flange portion and the welded portion in a direction parallel to a surface of the flange portion is denoted as X mm, and
only those values of R, a, and X that satisfy all of the following formulas are selected:
X> 1.5 mm;
R≥ 2 mm;
1 mm≥ a> 0 mm;

+√(2 Ra−a 2 ) mm>1.5 mm; and

+√(2 Ra−a 2 ) mm≥ X.

2. The automobile frame component according to claim 1 , wherein the one-side welding method is a laser-arc hybrid welding method, and the welding position X is continuously welded using the one-side welding method.

Assignees

• Tamai Yoshikiyo
• Fujita Takeshi
• Kitani Yasushi
• Takebe Hiroyuki
• Jfe Steel Corp

Inventors

• Tamai Yoshikiyo
• Fujita Takeshi
• Kitani Yasushi
• Takebe Hiroyuki

Classifications

• Y10T403/477

  Fusion bond, e.g., weld, etc. · CPC title

• B23K9/028

  for curved planar seams · CPC title

• B62D21/00

  Understructures, i.e. chassis frame on which a vehicle body may be mounted (combined frame and vehicle body B62D23/00 {; characterised by the material thereof B62D29/00}) · CPC title

• B23K26/348 Primary

  in combination with arc heating, e.g. tungsten inert gas [TIG], metal inert gas [MIG] or plasma welding · CPC title

• B23K2101/006

  Vehicles · CPC title