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April/May, 2024


The Essential Role of Fixture Design in Laser-Based Welding Applications


By Todd E. Lizotte, Orest Ohar and Joseph Dagher, Bold Laser Automation L


aser-based welding has revolutionized the manufacturing landscape, enabling the precise and efficient joining of intri-


cate assemblies across diverse sectors, including medical devices, automotive, aero- space, and the growing battery and electric vehicle (EV) industries. While lasers are undeniably crucial for


achieving top-tier welds, the significance of fixture design cannot be over-emphasized. A well-crafted fixture is the backbone of the welding process, ensuring stability, repeata- bility, and, ultimately, the operation’s success. There are a few essential functions that


must be addressed in fixture design to unlock the full potential of laser-based weld- ing in these industries. These include: ease of loading/unloading, ensuring intimate con- tact between parts being welded, maintain- ing consistent component tolerances and fix- ture registration, and providing a clear line of sight for laser welding and alignment ver- ification through cameras. Neglecting these functions can lead to subpar weld quality, early failures, and significant production setbacks.


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Loading/Unloading Efficiency is paramount in the fast-


paced world of manufacturing. A well- designed fixture must facilitate the smooth


loading and unloading of components to be welded. This is especially important in indus- tries like medical devices, automotive, aero- space, and EVs, where precision and speed are imperative. A fixture that hampers the easy place-


ment and removal of parts can impede pro- duction throughput. This is further high- lighted in cases where fixtures act as pallets, preloading components within the fixture before transferring them to the laser system. Consider a medical device manufactur-


ing scenario where tiny, intricate compo- nents must be laser-welded. An inadequately designed fixture can make it difficult for operators to position these delicate parts accurately. In many cases, fixture selection might involve robotic handling to bring the components together one assembly at a time.


Optimal Part Contact Achieving high-quality welds demands


A palletized fixture being placed into a laser welding tool.


630.629.6646 www.matr.com


optimal contact between the parts to be joined. Gaps or misalignment between com- ponents can result in subpar weld quality, compromising the structural integrity and


Continued on next page


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