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Weldbonding

SpecialChem / Sep 8, 2004

Weldbonding is a hybrid method of assembly that utilizes both the welding and adhesive bonding processes. Weldbonding is claimed to provide the advantages of both processes while minimizing the disadvantages. The benefits of instant strength and high peel resistance provided by the welds supplement the adhesive advantages of uniform stress distribution, fatigue and vibration resistance, improved strength and durability, and greater design flexibility. Initially developed in the Soviet Union and used in the fabrication of transport aircraft, weldbonding continues to be used in the assembly of aircraft parts and other large structures. Weldbonding has also found its way into the ground transportation markets. It is in high volume market segments where the potential of weldbonding seems to be greatest. Weldbonding can be fully automated and utilized with robotic systems. It has been successfully applied on both thin gauge aluminum and steel substrates and to a lesser extent on titanium. This article will first summarize the processes that are commonly used with weldbonding and explore the requirements for the adhesive formulations that can be employed in the process.

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