Eddy-Current Sensor Fully Automated Assembly Line

The eddy-current sensor assembly line uses a multi-process one-piece-flow layout that strings flexible feeding, precision press-fitting, inline inspection, functional and EOL testing, and automatic sorting into a continuous flow. It was delivered in 2025 to a leading domestic automotive sensor maker (shown as an industry-generic description under customer confidentiality constraints).

The feeding station uses a flexible multi-part scheme compatible with several component variants, while the press-fit station monitors assembly through a force–displacement curve and rejects anomalies. The line follows a modular layout with per-model process recipes; routine multi-variant changeover takes no more than 15 minutes, and capacity can be expanded by adding modules.

Inspection covers three inline types — vision, force-position and functional — across key stations. At the end of the line, functional and EOL testing performs 100% inline verification of every unit, and out-of-tolerance parts are removed by an automatic sorting station to prevent escape.

Key-station data is captured automatically at unit and key-process granularity, supporting batch and per-unit traceability and MES integration. The equipment is designed and built to automotive-grade quality requirements, supporting customers' IATF 16949 audits. Compared with manual and semi-automated modes, the line raises productivity by more than 30%.

The feeding area is deliberately designed for mixed-material inputs: several feed channels and orientation mechanisms present frames, coils and small parts in a single reference posture, so downstream stations never wait on or rework a misoriented component. The zero-defect target is implemented through poka-yoke at every locating point — a part that is missing, reversed or unseated trips an interlock before the station cycle completes, keeping defective assemblies from entering the one-piece flow at all.

The same modular architecture transfers to other automotive sensor programs. Production cells for pressure, position and speed sensors reuse the feeding–press-fit–inspection–EOL–sorting sequence with tooling and recipes adapted per product, so a proven line can be extended for a new sensor family without redesigning the process from scratch. Routine changeover between supported variants stays within 15 minutes, and later capacity increases are handled by adding modules rather than rebuilding the line.

Delivery is available as a full turnkey line, a standalone machine or a custom-engineered solution matched to the buyer's existing layout; standard solutions ship on an approximately 60-day cycle, while complex turnkey scopes are assessed from process count and customization needs. Every delivery includes the same automotive-grade documentation package, with key-process records structured for MES upload and IATF 16949 review.