View a Few Different Applications Available Using an SPI Fibre Laser To Weld Stainless Steel. You Can View Many More Applications Here - http://www.spilasers.com/applications.aspx

1. Type
Power
Gas
Spot
Frequency
Speed
Welding
Lap Weld of Stainless Steel
SPI’s CW lasers can be used in a vast array of welding applications. The Single Mode beam quality
produces a high quality, repeatable weld with a large process window.
This stainless steel lap weld used 0.6mm thick parts. The full penetration weld was developed through
several trials with varying speed and gas flows. The R4 laser produced a large process tolerance with
good quality achieved at a variety of focus positions and speeds.
Argon shielding was used both co-axially and below the part to ensure a clean, smooth weld with minimal
peak on the weld head. The large adjustable power range of the R4 fiber laser can be used to
successfully process thinner materials without introducing a Heat Affected Zone (HAZ). Although this
sample was produced using Continuous Wave (CW) operation the laser can also be modulated to
further control the heat input in complicated geometries.
Multi-mode variants of the R4 laser are available giving a portfolio of weld profiles ensuring that the SPI
range can reproduce or improve upon the weld results produced by traditional technologies or even other
laser welders.
R4 400W CW Single Mode Laser
400W
Argon
59.9 µm
CW (100% Duty Cycle)
120 mm/s

2. Type
Power
Gas
Spot
Frequency
Speed
Welding
Low Mode Laser Welding With Pulse Modulation
The Pulse Modulation capability of the SPI low moded CW fiber lasers make for a seamless transition
from Nd:YAG to Fiber Laser for the most demanding applications. With SPI Lasers 200W Low Mode
M2
~4 laser, precision applications from medical devices to electronics packaging are realized with the
highest level of quality and consistency for use in high technology manufacturing.
The low mode fiber laser in these applications offers the advantage of a high intensity beam with a
spatial profile ideally suited for micro-welding. Penetration, smoothness, homogeneity and appearance
are finely controlled through the combination of power control and modulation rate (Max. 100kHz). The
intensity profile allows for the capability to process alloys up to and including high melting temperature
variants along with refractory metals. SPI fiber lasers offer class leading reliability for your high value and
high volume manufacturing requirements.
 Medical Devices
 Micro-Electronics
 Foils and Metal Films
 Hermetic Packaging
 Battery Technology
 Wire Bonding
M2
=4
160W
Ar/He Mix
205um
Pulse Modulation / ~80% Pulse Overlap
30ms Pulse Width at 30pps

3. Type
Power
Gas
Spot
Frequency
Speed
Welding
Butt Welding of Aluminium
Fiber laser welding has several advantages over conventional techniques including minimal shrinkage &
distortion, small Heat Affected Zone (HAZ) and a narrow weld bead.
Butt welds are an extremely useful process that with the help of laser welding can replace lap welds in
many situations. This can reduce material cost, thickness and weight. As laser welding is non-contact
and only requires one sided access then many previously inaccessible areas can be processed.
This example shows the cross section of two equally thick sections of aluminum being butt welded
together. Fit up of components improves performance but small gaps of up to 8% of the thickness of the
thinnest part can be tolerated.
The application of lap welds can be seen in many industrial sectors including automotive and white
goods.
The 4 mode variants available form the SPI range give a portfolio of weld profiles ensuring that the SPI
range can reproduce or improve upon the weld results produced by traditional technologies or even other
laser welders.
R4 500W CW Single Mode Laser
500W M2=7.5
Argon
133.3 µm
CW (100% Duty Cycle)
0.75 m/min (12.5mm/sec)