Laser Welding + 3D Weld Seam Inspection: Every Part Judged OK / NG at the Station

For sealed circumferential seams such as tank end caps, two risks dominate volume production: small pores and offset that the eye cannot reliably catch, and defects found only after a whole batch is welded. Beipin Laser (Kunshan, Suzhou, China) builds pre-weld 2D positioning, laser welding and post-weld 3D seam inspection into one cell: every part is inspected and every result is recorded.

Three checks in one cell

• Pre-weld 2D: industrial area camera, lens and light (Hikvision); checks cap-to-body fit against an OK reference; deviation beyond ±0.25 mm is NG.
• In-process (optional): coaxial OCT weld depth monitoring.
• Post-weld 3D: Keyence LJ-X8100 2D/3D laser profiler scans the full seam, detects pores and offset, and measures seam width.

Acceptance metrics (current project)

Real capability depends on your material, seam type and surface; it is confirmed with your samples.

Project example: automotive aluminum tank end cap, circumferential filler-wire laser welding

6 kW fiber laser (Raycus RFL-C6000S, 50 μm core); welding head SW6000-02 (150 mm collimation / 250 mm focus); wire feed 0–15 m/min; three-station rotary module; changeover ≤15 min; Advantech IPC with Beipin BP-MES-W software.

Choosing a 3D weld seam inspection supplier: 6 things to check

1. Test with your own OK parts and defect samples, and ask for missed-defect and false-reject rates.
2. Define defect types and minimum sizes in writing.
3. Check whether inspection time is included in the cycle time.
4. Confirm MES fields and communication protocol.
5. Agree how acceptance is run (run-off duration, part count, criteria).
6. Prefer one supplier responsible for both welding and inspection.

FAQ

What is the difference between 3D and 2D weld inspection?

2D sees position and edges; 3D laser profiling measures height, so pore depth, seam width and offset are measured directly.

Can you add only a 3D inspection station to our existing line?

Not at present. We deliver integrated welding + inspection cells, tuned and accepted together.

Where are you? Can we visit?

We are in Kunshan (Suzhou), China. Send samples, or book a visit to watch the sample test.