The wire harness industry is evolving, and
the demand for reliable terminal connections has never been higher. Whether
dealing with traditional copper or transitioning to lightweight aluminum,
operators face a daily challenge: achieving consistent tensile strength. In
ultrasonic terminal welding, success comes down to mastering the exact
parameters for your materials.
At Eastontech, we understand that even with
high-performance semi-automatic equipment, the operator's understanding of
welding dimensions is the key to minimizing defects. Here is a practical
breakdown of how to set your machine for optimal results.
Copper Wire Welding: Precision Meets Strength
Copper is the industry standard, but larger
cross-sectional areas require careful calibration. For instance, when working
with a standard 6.0 mm²
copper wire, the target tensile strength should comfortably exceed 1200 N. To
achieve this, operators need to set the welding length to 11 mm, with a width of 4 mm and a compressed height of around 1.6 mm.
As the wire size increases, the parameters
must scale accordingly. A heavy-duty 50 mm² copper wire demands a tensile strength of over
5000 N. Your equipment settings should reflect a 14 mm welding length, a 14 mm width, and a 3.8 mm height. Ensuring these dimensions are locked in
will prevent weak joints and ensure maximum conductivity.
|
Welding
Dimensions
|
|
Wire Specification
|
Weld Length
|
Weld Width
|
Weld Height
|
Tensile Strength (N)
|
|
6 mm² Copper Wire
|
11
|
4
|
1.6
|
>1200
|
|
25 mm² Copper Wire
|
11
|
11
|
2.4
|
>3100
|
|
35 mm² Copper Wire
|
14
|
12
|
3.1
|
>4000
|
|
50 mm² Copper Wire
|
14
|
14
|
3.8
|
>5000
|
|
70 mm² Copper Wire
|
14
|
18
|
4.1
|
>6000
|
|
95 mm² Copper Wire
|
14
|
20
|
5.1
|
>6000
|
|
120 mm² Copper Wire
|
14
|
22
|
5.8
|
>6800
|
|
35 mm² Aluminum Wire
|
14
|
13
|
2.4
|
>2400
|
|
50 mm² Aluminum Wire
|
14
|
16
|
2.8
|
>3200
|
|
70 mm² Aluminum Wire
|
14
|
19
|
3.2
|
>3900
|
|
95 mm² Aluminum Wire
|
14
|
21
|
4
|
>4100
|
|
120 mm² Aluminum Wire
|
14
|
22
|
4.8
|
>4500
|
Aluminum Wire Welding: Handling the Lightweight
Alternative
Aluminum wires are increasingly popular for
weight reduction, but they are softer and more prone to deformation during the
welding process. Operators must adjust their approach to prevent cutting the
strands while ensuring a solid bond.
Taking a 50 mm² aluminum wire as an example, the required
tensile strength is naturally lower than copper, sitting at >3200 N. The
crucial difference lies in the dimensional settings. The welding width needs to
be wider—typically 16 mm—with a
lower height of 2.8 mm
(compared to copper's 3.8 mm
for the same square footage). This wider footprint distributes the ultrasonic
energy more evenly, creating a strong solid-state weld without compromising the
structural integrity of the aluminum.
The Operator's Advantage in Semi-Automatic Setups
While fully automated lines have their
place, semi-automatic ultrasonic welding machines offer unparalleled
flexibility for diverse production runs. An experienced operator equipped with
the right parameter charts can switch between a 35 mm² and a 120 mm² batch seamlessly. The secret is knowing that a
120 mm² aluminum wire needs a
generous 22 mm welding
width to hit that >4500 N tensile strength mark.
Elevate Your Harness Production
Consistent quality is not an accident; it
is the result of precise parameters and reliable machinery. By utilizing these
dimensional guidelines, your production floor can reduce scrap rates and
deliver superior harnesses to your clients. When your operators are backed by
robust equipment designed for exact calibration, hitting those strict tensile
strength requirements becomes an everyday reality.
