Every Weld, on the Record: Building a Production Weld Record

Welding quality has traditionally rested on qualified procedures, qualified people and inspection. A Welding Procedure Specification (WPS) defines how a weld is made, a Procedure Qualification Record (PQR) shows the procedure was tested, welders are qualified to it, and inspectors check the finished work. The system works, with one gap: for most production welds, nothing records how that individual weld was actually made.

Automation can close the gap. A robot already knows exactly what it did, and capturing that as a structured record for every weld gives a level of traceability that is very hard to achieve by hand.

What belongs in a weld record

A useful record answers five questions: which weld, made by whom or what, to which procedure, with what parameters, and with what result. In practice:

• Weld ID. A unique identifier linking the weld to its part, panel, block and drawing.
• Robot or operator. The machine or welder that made it.
• WPS. The procedure followed, including revision.
• Current and voltage. Measured values during welding, with any commanded setpoints labeled as such.
• Wire feed speed. Closely tied to deposition rate and current.
• Travel speed. How fast the torch moved along the joint.
• Torch angles. Work and travel angles along the seam.
• Seam-tracking corrections. How far the real joint was from the planned path.
• Timestamps. Start, end and duration.
• Inspection result. The outcome of visual or other inspection, and who performed it.

Measured, not nominal

A procedure gives allowed ranges; a production record captures measured values, ideally sampled along the weld, so it can show whether parameters stayed in range for the full length.

Measured current, voltage and travel speed support arc-energy or heat-input calculations, but only when the calculation method, units, sampling basis and any efficiency factor are defined. Pulsed and waveform-controlled processes make this especially important. The same data can flag welds where parameters drifted.

Why it matters

Focused inspection. When every weld has data, inspectors can concentrate on welds whose records show anomalies instead of sampling blindly.

Faster root cause. When a defect turns up, the record shows how that weld was made, which narrows the cause: parameter drift, a fit-up problem or a consumable issue.

Contract and class traceability. Where owners, classification societies or government quality systems require traceability, per-weld records provide it.

Continuous improvement. Over time, records show which weld families run cleanly and which need attention, feeding procedure and design changes.

The data belongs to the yard

Weld records contain a yard's procedures and production data, and that information belongs to the yard. Records should export in open formats and never be used for anything without the customer's agreement.

Build records into the system

Capturing records is far easier when the system is designed for it. When the robot program is generated from CAD, every weld already has an identity. When the power source and motion controller share a time base, parameters line up with position along the seam. When inspection results are entered against the same weld ID, the record is complete. Catfish Proof is the part of Catfish OS that does this.

A procedure defines how a weld should be made, and inspection says whether it is acceptable. A production record shows how it was actually made. In automated shipbuilding, capturing that for every weld turns traceability from a burden into a by-product of the work.