Fiber Laser Applications: Nanosecond Welding

In this month’s applications feature article, we continue to look at the exceptional processing capabilities of our premium fiber lasers, focusing on a patented process exclusive to SPI Lasers, known as Nanosecond Welding.

This is an important process for a number of industries, including the electronics, automotive, aerospace, and medical sectors; in particular, the demand for dissimilar metal welding has grown significantly, as manufacturers search for cheaper, more productive solutions to this increasingly popular manufacturing challenge.

If you want to gain a deeper understanding of exactly what nanosecond welding is and how pulsed fiber lasers are used to achieve it; as well as finding links to a variety of more detailed whitepapers and webinars on this exclusive process, then read on…

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nanosecond welding

What is Nanosecond Welding? (WO2016128704, WO2016128705)

This welding technique using a fiber laser is a process patented by ourselves and therefore unique to our lasers.  It enables the laser user to create accurate and effective joins between a wide variety of different metals.

The process of joining dissimilar metals has long been a challenge for welding and design engineers who have often been told that it’s difficult or that it can’t be done. As any metallurgist will tell you, it is the combination of physical properties and metallurgical incompatibility that governs weldability. However, there are a lot of potential applications that require such joints, particularly bright metals to steels and aluminum alloys.

Our unique process has provided a differentiated mechanism that has proven itself to be extremely capable in joining a wide variety of dissimilar metals (Figure 1).

The use of nanosecond lasers for joining is unlike conventional welding in that it does not generate a large melt pool, so opportunity for the formation of these unwanted inter-metallic phases is inhibited.

Figure 1: Nanosecond (ns) welding of Aluminium, Stainless Steel, Mild Steel and Copper.

Our redENERGY G4 pulsed fiber lasers operate in the nanosecond pulse regime and feature PulseTune Functionality – allowing users to adjust pulse parameters instantly for each different stage of the process, providing a tailored solution for effective nanosecond welding.

Nanosecond pulse frequencies and improved pulse energies offer higher quality processing and maximum flexibility, for working with a variety of materials such as thin aluminium foils or thicker metals.

For more information on this subject you can view our webinar ‘Welding with ns pulsed fiber lasers’ given by VP of Marketing & Business Development Jack Gabzdyl by clicking the image below:

Alternatively read our whitepaper ‘Joining dissimilar materials with pulsed nanosecond fiber lasers’ written by Jack Gabzdyl (VP of Marketing & Business Development) and Daniel Capostagno (Applications Manager).

Why use Fiber Lasers for Nanosecond Welding?

There are a wide variety of uses for nanosecond welding in modern manufacturing industries, such as for the manufacture of batteries, PCB boards, and further electrical components.

Integrators can benefit from our most up to date fiber laser technology, providing a reliable, efficient tool for welding thin/dissimilar metals.

Fiber lasers improve the level of precision and quality when welding together metals to produce parts; with the ability to work with very fine foils as well as thicker metals.

The process also enables the welding of bright metals together, due to our fiber lasers patented back reflection protection. During the process both the laser and the surrounding surface remain protected.

Rest assured that lasers supplied by SPI come with a licence to use them under the patents.

Find out more about how our pulsed fiber lasers can help improve your business‘ productivity and profitability on our redPOWER G4 page!

Welding with Pulsed Lasers

An example of battery welding that lacks burn-through and witness marks.

What are the Advantages of Nanosecond Welding?

Nanosecond welding is an innovation which has enormous benefits to industry, due to its speed and precision.

Our pulsed fiber lasers improve processing speeds, operating in the pulsed nanosecond regime, making them the perfect industrial manufacturing tool for integrating into machines and production lines.

This form of welding is a delicate application but one in which our pulsed fiber lasers excel. Users have complete control over the intensity of the laser beam and its focus, which can be set to repeat the same manufacturing process time and time again.

Our patented ns welding process allows you to join metals of varying thicknesses and properties, achievable using our redENERGY G4 pulsed fiber lasers.

You can read more about the variety of advantages ns welding has over existing technologies in our Whitepaper.

spot welding

Check out our catalogue of e-resources

Interested in finding out more about our patented ns welding process? Visit our Welding page and search our library of Applications Insights and Postcards.

Highlighted below are a just a small selection of our Applications Insights and Postcards articles available for you to choose from:

Alternatively, why not head onto our Whitepapers page where you’ll find a range of welding resources from webinars to articles written by our experts.

Or to see this technique in practice check out our latest videos!

Discover more of our Fiber Laser Applications

We add a new article on a featured application each month to share with you how flexible an SPI fiber laser can be.

If you have missed any of our fiber laser applications that we have covered, these are easily-accessible from our News Archive.

To date we have documented about six separate processes. These include:-

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