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Applications > Joining technology > Process monitoring

Getting the process safely on the right track

 The quality of a laser welding seam is dependent on many influencing variables that cannot always be reproduced. Variations of e.g. joining geometry or the surface quality of the component to be welded can cause failures in the welding seam. A good welding result is dependent on correct welding process settings. Precitec sensors measure and control the right position of the laser spot before welding and ensure a quality that can be reproduced via the recognition of process emissions. Right after welding, the high-resolution camera system measures the geometry and surface quality of the seam. Our solutions offer the highest level of safety possible with constant monitoring of your automated joining process.

Applications
Welding depth monitoring with airbag detonator cap

When welding airbag detonator caps, monitoring of the welding depth is of great importance: On the one hand, one is not allowed to weld through it, because the detonator cap is filled with an explosive detonating substance. On the other hand, it must me welded at a depth that is enough to ensure that the detonator cap is sealed. The welding depth on airbag detonator caps has been monitored by the Laser Welding Monitor LWM for several automotive suppliers since 1999. 

Welding of security-relevant components

Constant quality monitoring and documentation is required when welding security-relevant components. Thus, the in-process monitor LWM (Laser Welding Monitor) is used when welding seat slide adjuster and backrests. The LWM sensor unit can be adapted as both standard optic and scanner optic. 

FormWelder Plus
Precise welding of small contours

Gambrel sticks, so-called ISOFIX latch serve for attaching children's car seats. Welding small contours takes place on a stationary welding station with a programmable X/Y axis system integrated into the processing head. This separates the small contours with high path accuracy. Process monitoring also controls the safety-relevant parts to 100% on line. 1.5 million latches are produced in a double work station annually.

Welding head YW52 - basic model
Optimized performance welding of auto body connections

Welding of auto body components places great demands on processing quality. Precitec coaxial process monitoring is used by the innovation alliance Green Carbody Technologies, in order to ensure continuous process monitoring. Thereby, the laser power is also adjusted to the processing time, in order to attain the best possible quality. 

Camera-based welding depth monitoring with mass flywheels

During CO2 welding of mass flywheels, the welding depth is controlled with a camera-based in-process monitoring. In order to be able to detect sporadic error in addition to welding depth detection, a camera is used here with a very high metering time period. 

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