TS EN ISO 17677-1

TS EN ISO 17677-1 is a vocabulary standard for the three closely related resistance welding processes named in its title: spot welding, projection welding and seam welding. Documents of this kind provide a common technical language so that design, production, quality and training teams use the same terms consistently when discussing resistance welding operations.

How the three welding processes differ

In general technical terms, resistance welding joins materials by passing electrical current through a contact region and generating heat where resistance is concentrated. Spot welding creates discrete weld spots, projection welding concentrates current through preformed projections, and seam welding produces a series of overlapping or continuous welds along a line. They belong to the same process family, but they differ in joint geometry, tooling arrangement and the way the weld is formed.

What this document covers

• It establishes terminology and definitions for resistance spot welding, projection welding and seam welding.
• It is a vocabulary document, not a procedure or acceptance-standard document with numerical limits.
• It supports consistent communication among engineers, operators, inspectors and training authors working with resistance welding.

Terminology standards are especially valuable where process variables, machine parts and weld outcomes can be described in more than one way. This document brings those terms together around the resistance welding methods named in its scope, helping align understanding without turning itself into a manufacturing or testing specification. This record represents the withdrawn edition of TS EN ISO 17677-1.