US 2026/0199983 A1Published application

Tube multi-point incremental forming apparatus and method

AssigneesNanjing University of Aeronautics and Astronautics, Wuxi Research Institute, Nanjing University of Aeronautics and Astronautics

InventorsXunzhong GUO, Chunmei LIU, Hui WANG, Cheng CHENG, Qiucheng YANG, Yifan ZHA, Tao TAO, Yun WANG, Zexiong ZHANG

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Abstract

Disclosed is a tube multi-point incremental forming apparatus and method, including a tube feed apparatus and a forming apparatus. The tube feed apparatus and the forming apparatus are installed on a computer numerical control machine tool workbench (8); the forming apparatus includes a large gear (2), a small gear (19) and multiple sets of independent tool devices, each set of tool devices includes a tool head (16) and a tool head motor (18), the tool head (16) is fixed on the large gear (2), which can change its radial angle with the large gear (2) to change the initial angle of the three tool heads. The device is configured to allow multiple tool heads to process different parts at the same time to achieve efficient processing.

A tube multi-point incremental forming apparatus, comprising a tube feed apparatus and a forming apparatus, wherein:

the tube feed apparatus and the forming apparatus are installed on a computer numerical control machine tool workbench (8);
the forming apparatus comprises a large gear (2), a small gear (19) and multiple sets of independent tool devices;
each set of tool devices comprises a tool head (16) and a tool head motor (18);
the tool head (16) is fixed on the large gear (2), which can change a radial angle with the large gear (2) to change initial angles of the three tool heads;
each tool head (16) can move independently along an axial direction driving by a corresponding tool head motor (18);
meanwhile, the small gear (19) drives the large gear (2) to rotate, so as to drive the multiple sets of tool heads (16) set along a radial direction of the large gear (2) to rotate together to realize a multi-point incremental forming of the tube;
each set of tool device comprises a mold guide seat (15), a tool head (16), a mold mounting plate (17), a tool head motor (18), a forming bracket (20), and a positioning guide sleeve (21);
the tool head (16) is fixed on the mold mounting plate (17) through the mold guide seat (15), the forming bracket (20) and the positioning guide sleeve (21);
and the mold mounting plate (17) is fixed on the large gear (2), which can change a radial angle between the mold mounting plate and the large gear (2) to change the initial angle of each tool head;
the tool head (16) is driven by a corresponding tool head motor (18), and each tool head (16) can move independently along its axial direction;
a tube diameter is set as d, a groove depth of the tube wall is set as e, a fixed screw distance is set as p, and a tube propulsion speed is set as vz, wherein vz is a speed along a z-axis direction, a rotation speed of the gear around a z-axis ω is an angular velocity of the tool head on a circumference, initial angular positions of the three tool heads are θ1, θ2 and θ3, respectively;
changes of the positions of the three tool heads with time t is as follows:
for a first tool head:
?
(
t
)
=
d
-
2
⁢
e
2
⁢
cos
⁡
(
ω
⁢
t
+
?
)
;
?
(
t
)
=
d
-
2
⁢
e
2
⁢
sin
⁡
(
ω
⁢
t
+
?
)
;
?
(
t
)
=
p
⁢
ω
⁢
t
2
⁢
π
=
?
;
?
indicates text missing or illegible when filed
for a second tool head:
x
2
(
t
)
=
d
-
2
⁢
e
2
⁢
cos
⁡
(
ω
⁢
t
+
θ
2
)
;
y
2
(
t
)
=
d
-
2
⁢
e
2
⁢
sin
⁡
(
ω
⁢
t
+
θ
2
)
;
z
2
(
t
)
=
p
⁢
ω
⁢
t
2
⁢
π
=
?
;
?
indicates text missing or illegible when filed
for a third tool head:
x
3
(
t
)
=
d
-
2
⁢
e
2
⁢
cos
⁡
(
ω
⁢
t
+
θ
3
)
;
y
3
(
t
)
=
d
-
2
⁢
e
2
⁢
sin
⁡
(
ω
⁢
t
+
θ
3
)
;
z
3
(
t
)
=
p
⁢
ω
⁢
t
2
⁢
π
=
?
.
?
indicates text missing or illegible when filed

208 more elements

Abstract

Claims8