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processing | Joining & assembly


Right: Bieloma- tik Leuze has


developed an IR system to monitor thermal


distribution prior to welding


areas has now been developed. “After heating and shortly before joining, the machine operator uses a thermal imaging camera to determine whether the heat distribution corresponds to the values of a properly welded and verifi ed reference component,” Beiss explains. “If there is a duty of documentation, a QA control system can store the key ratios of every single component together with the camera image, the machine parameters, the exact production date and time stamp or the barcode. We have developed the software ourselves and can adapt and modify it to meet the requirements of the particular circumstances. That means we have the type of monitoring and data analyses exactly under control.” Bielomatik also reports developments in convection


welding using natural gas. One innovation is a technol- ogy that allows individual zones to be activated separately in a similar way to controllable IR tools. The user can regulate the supply of gas separately for each zone using valve technology and set it precisely by adjusting the nozzle. “Because of the ability to set the temperature distribution more precisely and the greater geometric degrees of freedom, the complex gas convection welding procedure is even more suited to joining high-end components made of glass fi bre reinforced polyamides in the engine compartment or


Right:


A natural gas-fi red convection


welding head


from Bieloma- tik. Indiviudal nozzle valves allow precise zonal heating control


complex moulded elements made of high temperature resistant plastics,” says Beiss.


Clear improvement Dukane has introduced a new laser welding system that is claimed to allow clear-to-clear plastic welding without the need for any laser absorbing additives. The company says the system incorporates a recently developed 2-micron laser which offers greatly increased absorption by clear polymers and enables a highly controlled melting through the thickness of optically clear parts. A new beam delivery system integrates both a programmable multi-axis servo gantry and scan head, supported by LaserLinQ software, which harmo- nises the action of both components moving the beam. This ensures highly precise and controllable beam delivery when welding mid-size and large components, the company says. According to Dukane, LaserLinQ also provides users with the ability to break complex weld patterns into separate geometric segments, modify each segment independently and assign different welding parameters to each segment. The CCTV camera integrated within the machine enables a live weld preview on the HMI screen and the ability to directly monitor and record welding cycles for further analysis. All laser enclosures


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