KLN Ultraschall AG – Lasers welding
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Lasers welding

Lasers welding QSW 400 L

The KLN QSW 400 L is a quasi-simultaneous laser welding machine using the principle cross laser beam welding.

The quasi-simultaneous welding combines contour welding and simultaneous welding. A scanner consisting of mirror and collimation unit (optical module to create a parallel beam path) leads the focussed laser beam with high speed several times over the welding contour.

Due to this high speed all welding contour areas are almost simultaneously heated and melted. Here the irradiated part gets in contact with the melt of the other part. Then by thermal conduction also the irradiated part is melted in the welding area.

By simultaneous welding pressure on both partners the parts are pressed together and connected (welded).

The KLN QSW 400 L is a modular laser welding machine. The advantage of the modular structure is that the central laser welding machine can remain unchanged in the various welding tasks and only the housing and its frame structure must be adapted to the actual welding task.

Thus, a well-tried laser welding unit can always be used. Moreover, adaptions to other welding tasks can be easily integrated, e. g. with rotary table, tool carrier, conveyeor or sliding table.

Front laser toolig

Technical data


  • Water-cooled diode laser with 300 W optical output power
  • Wave length 980 nm ±10 nm
  • Pilot beam at 650 nm ±15 nm (<1 mW)
  • Optical fibre suitable for wave length 780-1030 nm
  • Focal distance of collimation 58 mm
  • Focal distance f-theta objective 635 mm
  • Operating distance 728 mm
  • Operating field (scan field) 415 mm x 415 mm

Camera for observation of interior machine
(an additional inspection window in the lifting door is possible)

Crank for vertical height adjustment of scanner

Scale for vertical height adjustment of scanner

General characteristics

  • Welding force created by servo-electrical drive
  • Max. welding force (holding-down clamp) 2000 N
  • Max. weight of upper tooling 30 kg
  • Useful height adjustment range scanner 190 mm
  • Standard machine dimensions
    (without control cabinet) WxHxD 120 cm x 230 cm x 160 cm
  • Door opening standard machine (width and height)
    WxH 800 mm x 600 mm
  • Height clamping surface to bottom 980 mm
  • Possible height adjustment of the machine ±40 mm
  • Pneumatic connection 6 bar
  • Electrical connection: 400/230 V 50 Hz nominal current 10 A
    (max. backup 25 A)

Do you have any questions regarding our products or solutions?

We will be glad to help you and support you professionally.

Feel free to contact our service department Monday to Friday from 07:00am – 05:00pm. Outside our business hours you can contact our Hotline.

+49 (0) 6252 / 14 - 0 or send us a message
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