US 2026/0087205 A1Published application

Method for establishing point-ring laser welding heat source model, system and medium

AssigneeHefei Gotion High-Tech Power Energy Co., Ltd.

InventorsYunlong ZHANG, Chunlin ZHU, Zheng SHI, Haozhe CHEN, Yi JIAO, Xu ZHANG

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Abstract

The invention relates to a method, system, and medium for establishing a heat source model of spot-ring laser welding. The spot-ring laser consists of a central spot laser forming a volumetric heat source and a ring laser forming an annular surface heat source. The spot laser enables a high aspect ratio weld, while the ring laser provides auxiliary heating and controlled cooling of the material. The method allows the laser power ratio between the spot and ring lasers to be adjusted at any proportion, enables independent control of their defocus amounts, and uses parameters such as spot and ring diameters to effectively characterize heat flux density distribution. This model supports accurate simulation of temperature, stress, and deformation fields for spot-ring laser welding and is applicable to finite element simulations of linear and swing welding paths.

Claims11

Dependent claims

A method for establishing a heat source model of spot-ring laser welding, wherein spot-ring laser comprises spot laser of a central laser volume heat source and ring laser of an annular laser surface heat source, and control equations of a spot-ring laser welding heat source are shown in formulas (1) and (2):

q
Total
(
x
,
y
,
z
)
=
3
⁢
α
⁢
Q
·
u
⁡
(
z
)
π
⁢
r
v
2
⁢
H
⁢
exp
⁢
(
-
3
⁢
β
⁡
(
x
2
+
y
2
)
r
v
2
)
+
(
1
-
α
)
⁢
Q
π
⁡
(
r
2
2
-
r
I
2
)
⁢
exp
⁢
(
-
1
⁢
2
⁢
γ
⁡
(
x
2
+
y
2
-
r
s
)
2
(
r
2
-
r
1
)
2
)
,
r
v
<
r
1
<
r
s
<
r
2
(
1
)
u
⁡
(
z
)
=
{
1
,
-
H
≤
z
≤
0
0
,
z
>
0
,
or
⁢
⁢
z
<
-
H
(
2
)
in the formulas (1) and (2), qTotal(x, y, z) represents a total heat flux density function of the spot-ring laser welding heat source, (x, y, z) represents coordinates in a global coordinate system, a represents a laser power distribution coefficient and refers to a power ratio of the spot laser to the spot-ring laser, Q represents a total input laser power, β represents a heat flux concentration coefficient of central laser, y represents a heat flux concentration coefficient of annular laser, H represents an effective heating depth of the volume heat source and existence of a heat source heating effect when a heat source depth falls within a range of [−H, 0], and spot parameters comprise rv, rs, r1, and r2, wherein rv represents an effective heating radius of the central laser volume heat source, and the subscript v represents the volume heat source;
r's represents a position at which a heat flux density of the annular laser surface heat source is the maximum, and the subscript s represents the surface heat source;
and an effective heating range of the annular laser surface heat source is [r1, r2].

144 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/407,827Filed 3 Dec 2025
Priority: CN 202410073794.818 Jan 2024
Published: 26 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06F 30/23
Design optimisation, verification or simulation: using finite element methods [FEM] or finite difference methods [FDM]
B23K 26/06
Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam: shaping the laser…
B23K 26/21
Bonding: by welding
B23K 26/22
By welding: spot welding

Family

Application19/407,827Continuation
US 2026/0087205 A1This patent

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