K387 - Lincoln Tandem Arc Mounting Framework for NA Series Feeders

Engineered Precision for Automated Tandem Arc Systems

The Lincoln Electric Tandem Arc Framework Assembly (K387) represents a critical structural component for industrial automation, specifically designed to facilitate the deployment of high-deposition tandem arc welding processes. In the realm of heavy fabrication, where deposition rates and travel speeds are paramount, the stability and alignment of the welding heads are non-negotiable. This framework is meticulously engineered to support two standard automatic wire feed heads—specifically the NA-4F, NA-3SF, or NA-5SF models—providing a rigid and reliable platform that withstands the thermal and mechanical stresses of continuous industrial operation.

One of the primary technical challenges in designing custom welding fixtures is ensuring the correct spatial relationship between the lead and trail arcs while maintaining electrical isolation where necessary. The K387 solves this by providing a turnkey solution that includes all necessary mounting hardware and insulation materials. This ensures that the potential differences often utilized in tandem arc welding (such as DC lead and AC trail) are safely managed without the need for ad-hoc insulating solutions. The assembly is designed for seamless integration with the Lincoln Electric TC-3 High Capacity Carriage, allowing for immediate mobilization of the welding system along a track. However, its versatile design also permits direct mounting to user-fabricated gantries, manipulators, or stationary fixtures, offering flexibility for diverse production environments ranging from pipe mills to structural beam lines.

By standardizing the mounting interface for the NA-series heads, the K387 significantly reduces the engineering overhead required by fixture builders. Instead of dedicating valuable design hours to fabricating custom brackets and alignment mechanisms, engineers can leverage this pre-assembled framework to ensure optimal head positioning. The assembly allows for necessary adjustments to fine-tune the electrode stick-out and angle, which are critical variables in controlling bead profile and penetration in submerged arc applications. Ultimately, the K387 is more than just a bracket; it is an enabler of efficiency, allowing integrators to deploy robust tandem arc solutions with confidence and speed.