Author Topic: Welding with scanner  (Read 516 times)

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Offline Vlad222

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Welding with scanner
« on: February 12, 2018, 03:25:41 PM »
Hello all,

We have welding robot with scanner. Scanner has guarding glass but we often need to change it because of black soot and metal drops. What is the best way to overcome the problem? Blowing air? But It blows off welding gas. Move scanner to 90 deg from torch because we use only off-line scanning?

Offline SkyeFire

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Re: Welding with scanner
« Reply #1 on: February 13, 2018, 03:40:32 PM »
I've had this issue with laser-welding systems.  Most of them used a sharply focused air-knife blowing across the glass to deflect much of the flying weld slag -- it should be possible to make one that does not interfere with your weld gas.

However, even with the air knife, sufficiently large and/or fast specks of slag were able to pass through the air knife and impact the final optics of the laser.  Which, with a 4kW beam emission, could cause the Very Expensive lens to be destroyed in a few hours.  So the final line of defense was a much cheaper piece of "disposable" glass placed between the air knife and the expensive lens.  Even with the air knife, this glass generally was replaced once every shift.

As long as particles of molten metal are being propelled at high velocity, I'm not sure there is a complete solution to this problem, merely mitigation approaches.

Offline RoboWeld

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Re: Welding with scanner
« Reply #2 on: February 13, 2018, 11:10:40 PM »
If the scanner does not need to be active during welding what about a solenoid (or air) operated shutter to protect the lense?.