Lap fillet arc-welded joint

Patent metadata

Field	Value
Publication number	US-10590974-B2
Application number	US-201615547256-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Feb 12, 2015
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A lap fillet arc-welded joint produced by overlapping two metal sheets and welding an end portion of one sheet of the two metal sheets to a surface of the other sheet along the end portion of the one sheet includes a protruding curved potion being bead-shaped and protruding from the surface of the other sheet; and a weld toe positioned on a top portion of the protruding curved portion.

First claim

The invention claimed is:

1. An automotive suspension part comprising an upper part and a lower part having corresponding substantially planar sidewall portions joined using a lap fillet arc-welded joint, wherein the lap fillet arc-welded joint is produced by overlapping two metal sheets defining the corresponding sidewall portions and welding a flat end surface of an upper sheet of the two metal sheets to an outer surface of a lower sheet of the two metal sheets along the end surface of the upper sheet to form an overlapped portion, the lap fillet arc-welded joint comprising:
an outwardly bent protruding curved portion extending across the lower sheet offset from an end surface thereof, the protruding curved portion being bead-shaped and protruding from the outer surface of the lower sheet to form a top surface;
a weld bead extending along the end surface of upper sheet, the weld bead having a weld toe positioned on a sloped portion of the protruding curved portion and a weld toe positioned on an outer surface of the upper sheet, the sloped portion being on an end surface side of the protruding curved portion to be welded to the end surface of the upper sheet, and the weld bead having a top surface; and
a notch formed between the top surface of the protruding curved portion and the top surface of the weld bead;
wherein a stress concentration factor K t of the lap fillet arc-welded joint is defined by the following Equation:

K
t

=

1
+

[

1
-

exp
⁢

{

-
0.9

⁢

t
1

+

t
2

h

·

(

π
-
θ

)

}

1
-

exp
⁢

{

-
0.9

⁢

t
1

+

t
2

h

·

(

π
2

)

}

]

·

[

(

t
2

t
2

-
h

-
1

)

·

(

t
2

-
h

)

(

4.27
·

t
2

t
2

-
h

-
4

)

·
ρ

]

0.83

wherein Θ is a flank angle between the weld bead and the sloped portion of the protruding curved portion, ρ is a radius of curvature of the weld toe positioned on the sl

Assignees

• Jfe Steel Corp

Inventors

• Shiozaki Tsuyoshi
• Tokita Yuichi
• Tamai Yoshikiyo

Classifications

• B23K2101/06

  Tubes · CPC title

• B23K33/004

  Filling of continuous seams · CPC title

• B23K9/0026

  specially adapted for particular articles or work · CPC title

• F16B5/08 Primary

  by means of welds or the like (welding B23K) · CPC title

• B23K2101/28

  Beams · CPC title