That was the task.

Design and construction of a laser welding system for three-dimensional processing of complex customer components in the clean room of RJ Lasertechnik GmbH. In a 3D processing area measuring 400 x 400 x 400 mm, it should be possible to approach each processing point at any spatial angle. Laser welding is performed in pulsed and continuous mode.

And this is how we solved it.

A pulsed QCW fiber laser with 150 W average power and 1500 pulse power as well as good beam quality (200 µm multimode optical fiber) was selected as the laser source. The heat conduction welds achieved in this way connect sensitive components from medical and semiconductor technology in a vacuum-tight and gentle manner. The entire system was designed in stainless steel in order to meet the cleanliness requirements in the clean room.

The necessary dynamics are achieved with linear drives and torque motors in the axis drives. The 5-axis tool paths calculated by the top-level Fanuc CNC control are generated from the 3D data sets of the customer components and implemented in MasterCAM. In 2 ½ D operation, the possible machining area is even 600 x 800 x 400 mm. A maximum path accuracy deviation of 20 µm can be achieved in the application.

The granite machine portal prevents any vibrations from the machine or the building. The fully air-conditioned and dust-free atmosphere in the processing room guarantees absolutely consistent welding quality, around the clock and all year round.