Initial Situation:

Inspection of a laser weld seam for pores and geometrical anomalies

The production of a client in automotive industry is subjected to extremely stringent quality requirements. This is valid particularly also for the precision of laser weld seam of fine mechanical work. 100% inline supervision is required for the following task:

A laser weld beam (width ca. 200µm) has to be verified with respect to the presence of pores and geometrical anomalies. Camera inspection performed until now turned out to be not stable. Therefore the client is forced to implement an improved monitoring process.

Inspection of a laser weld seam for pores and geometrical anomalies
Inspection of a laser weld seam on fine mechanical parts

The challenge

The resolution required amounts to 4µm. The high gloss finished material and glossy laser weld seam may give rise to reflections, and the space for installation is restricted. A low form factor for the monitoring equipment is imperative.

The QuellTech Solution

The sensor QuellTech Q4-5 features a sufficient resolution and an extremely compact design (86x32x85 mm). Two laser scanners at distinct offset positions have been integrated, so only half the cycle time is required for an weld seam inspection.  The high resolution of the sensor in the direction of travel is achieved by a sophisticated selection of optical components and a blue laser source of 20 µm width.

Result for the client

The rugged design of the Q4-5 sensor configuration withstands the conditions in the surroundings of the inspection zone, proves to be stable and is able to recognize and to screen the defective weld seam at once. Recorded measurement data deliver reliable statistics of the production quality, and hence have allowed an optimization of the entire production process.

Are Quelltech Laser-Measurement-Systems suitable for your particular application? 

Feasibility studies for the particular task can be performed beforehand. Initial test measurement (free of charge). Simply send us a corresponding sample. Flexible and affordable adaptation to customer specific requirements within a short delay. Safe and reliable products, proven in practical applications.