Laser welding of the lock body

21. 4. 2023

Our application engineers have successfully debugged the process of welding a small curved tinned wire to the lock assembly using a state-of-the-art 300W QCW IPG fiber laser and achieved an unbreakable connection with remarkable accuracy and speed.

One of our customers came to us with a requirement for a non-removable connection of a very small component to a lock assembly. A tiny curved tin-plated wire with a diameter of only 0.5mm and a length of 6.75mm was thus welded to a nickel-plated CuZn lock assembly.

A 300W QCW IPG fiber laser with high pulse energy, which can reach up to 30 J, was selected as suitable for the application. In a single pulse, both the wire and the lock material are transformed into a melt which, after mixing and subsequent solidification, forms a very strong bond. Although the use of inert gas is not necessary for the process, its deployment improves the weld design by reducing fumes contaminating the weld environment during the process.

The process is complicated in particular by the very small dimensions of the components to be welded, which make it difficult to position them in relation to each other with repeatable precision. Nevertheless, the application engineers at LINTECH have managed to fine-tune the process and have achieved an unbreakable connection with remarkable precision and speed.

You can watch the slow motion welding process in the following video.

Video

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