Laser welding under vacuum
The FOCUS LaVa is our new product line. LaVa is the acronym for laser welding under vacuum and combines the well known advantages of the laser with the vacuum. Due to the reduces pressure of around 1 mbar the keyhole during deep penetration welding is stabilized with the effect that the penetration depth can increase by twice with same laser power. Another benefit is the significant reduction of spatters near to zero.

The picture shows a FOCUS LAVA with 1 kW Fiber laser and cooling in 19" Reck and an optic without z axis shift. The two monitors are used to display the camera video and the cnc-interface.

The video shows a laser welding process with different ambient pressure.

Further Information:
LaVa Flyer
Physics Procedure
Laser Community (german)
Laser Community (english)
Application Note RWTH Aachen

Features

Maximum Flexibility

In order to serve our customer with the best suitable solution for their process or product, the machine concept is based on a unit assembly system. That means you can choose between different laser sources and optics from our supplier.
In addition we offer a customized solution where it is possible to integrate the actual laser. In some cases even the optic can be used.
For further information please
contact us.

CNC System

For high-precision processing an exact workpiece manipulation is necessary. To comply to this, we developed a CNC system with position accuracy less than 30 µm and a movement speed of 100 mm/s. Another big advantage is that the stepper motor for each axis is outside of the chamber.
If your workpieces requires axial or radial welding you can use the included internal rotary manipulator which is fully integrated into the CNC control unit.

Extras

A customized clamping of your parts is very important. We offer standard devices like three-bracket chucks in different sizes or as always customized solutions that fits to your task.
The measurement of the temperature is possible with thermocouple bushing.

Specifications

Spezification LAVA-L8 LAVA-L95
Laser Faser or Disc Faser or Disc
Beam Power 500 W SM up to 2 kW MM 500 W SM up to 6 kW MM
Beam guide system Light conducting cable Light conducting cable
Focal position alignement manual or integrated in CNC system integrated in CNC system
Focus traveling distance 100 mm 200 mm
Working chamber dimension Ø235 mm x 155 mm 500 mm x 400 mm x 475 mm
Work piece dimension Ø150 mm x 100 mm 250 mm x 200 mm x 100 mm
Linear speed 0.1 to 100 mm/s 0.1 to 100 mm/s
Rotary speed from 0.1 to 1000 rpm continuously adjustable from 0.1 to 100 rpm continuously adjustable
Position accuracy less than 30 µm less than 30 µm
Pump down time ca. 30 seconds ca. 60 seconds
Foot print 2 m x 2 m (angle-assembly) or 1 m x 3 m (straight) 2 m x 2 m (angle-assembly) or 1 m x 3 m (straight)
Power Supply 400V / 4.6 kW, triple phase 400V / 4.6 kW, triple phase
Gross Weight ca. 350 kg ca. 750 kg