Stainless Steel Poor Cut | Fiber Laser Cutting | Problem and Solution
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- Опубліковано 2 тра 2022
- The video will show examples of stainless steel poor cut of fiber laser cutting, you can find problem and solution of each example of stainless steel poor cut.
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Today we will step to the poor cuts of stainless steel, the same we will explain one by one in pictures. Before get into the main chapter, please don’t forget to subscribe to this channel, and give me your “Like”, it will be a gift for me, thank you for your support.
The first picture, we can see there are striped slags at the bottom. The reasons for this issue could be 1-focus position is set too high, we need reset the focus parameter and cut again. Normally, the focus position for cutting stainless steel is negative, a video up here tells the details of focus positions in fiber laser cutting; 2-pressure is set too low, please try to adjust higher the pressure appropriately and cut again.
Next picture, there are clear layers on cut section, the bottom layer is a little whitish. The poor cut could be caused 1-focus position is set too high, we need to lower down the focus position and cut again; 2-nozzle height is set a little lower, so we should raise the height and make a try in cutting; 3-pressure is set too high, please try to adjust less the pressure appropriately and cut again.
There is clear burnt layer at the bottom, it is probably caused by higher focus position, so we should lower down the focus position approximately and try to cut again.
Next picture, we can see there are droplet-like tiny burrs on the bottom, the reasons caused such problem are 1-cutting speed is faster, it is better to slow down a little; 2-focus position is set a little lower, so we need to raise focus position.
The picture shows there are slags at corners, it may be caused by higher focus position, so it will get better if we lower down a little the focus position.
The picture, we can see the cutting gaps are wider, it is probably caused by the contaminated or damaged protective lens, so we should replace the protective lens and try to cut again.
Next picture shows a rough cut section, and blue light is emitted from the cutting seam during the process. The reasons could be 1-focus position is set a little lower, so we need to raise focus position; 2-cutting speed is faster, it is better to slow down a little; 3-the start point is not set very well, so we can get a slow start point or use a round hole at the start point of the leading line.
Next picture shows the half good half poor. If we have such cuts, it could be 1-the nozzle is not round enough or there are particles inside the nozzle, so it is better to check the nozzle or just replace one; 2-the protective lens is not clean any more, we need to take it out and inspect whether there is water, oil, waste or spots on it. If it is contaminated, clean or replace it. More details on the protective lenses, please check the video up here. 3: laser beam is offset from the very center, so we need to take steps to adjust the laser center. The video up here will show the basic steps to find the center.
Let’s see this picture, there is yellow color shown inn the cut section. If we meet such condition, probably the nitrogen gas is not pure enough or there is oxygen or air in the hose. So we need to check the nitrogen purity, is it 99.99%? Check whether there is leakage places in gas hoses and the parameters setting of gas delay in “Layer”.
Cutting aluminum alloy and brass is the same as that of stainless steel, and the problems generated in the cutting are also similar; the difference is that due to the high reflectivity of aluminum alloy and brass, when the thickness is the same as that of stainless steel, other parameters are similar, as long as appropriately to reduce cutting speed and lead-in line speed. When cutting brass ≥3mm, it is recommended to use oxygen as the auxiliary gas.
Several friends really sent a cut picture to me and just say “Hi, the cut is poor, why?”. First my name is Clara, and they did not tell me anything about their machines, the power, the nozzle, the focus, the parameters, how could I tell them “Why”. Here I would like to make myself clear, no offense. If you have a poor cut and don’t know why, you can consult with the supplier, click the video up here, it is a basic step to run the check. Or please go through the two videos, it shows the common poor cut examples. But if you have checked all possible reasons and still can not figure out why. Please including as much information as you can, like the machine power, metal thickness, parameters setting, gas and other necessary factors if you need me to run a customized check on the specific poor cut. You can find my contact information below in the description. - Наука та технологія
I have never seen such accurate and informative laser diagnosis! Far better than talking to mazak themselves!
Thank you, it is my pleasure to be helping!
Thank u so much. Clear, simple, straight to the point and u also gave a solution. Great tutorial !
☺️☺️
Most useful youtube channel . Great work keep it up .
Thanks.
Great video.
Thank you
Very good, thankyou
So welcome☺️
Hi mrs.clara how are you your all videos are very useful for us ❤️ I want that you make a video on parameters
Thank you
Hi clara good explanation Thanks, i have one doubt we may select direct cut without pierce option.
Yes, thin plate.
Hi clara can you please make a video explaining how to make the best parameters for marking on galvanized steel or stainless steel
Let me try to find it, thanks
Hi clara how's it going, hope everything okay, i have a problem with my machine , it uses 1500w power , im trying to cut an ms sheet 4mm thickness, i applied speed at 1 mm , nozzle is 1.2mm and the height of it 1mm , gas pressure 1bar at 100% (oxygen) . Adjusted the focus as per your videos and it seems okay but the problem is when i do a square or any shape its not cutting it means itll stay on the sheet i can only hammer it to remove it
All parameters I shared on my channel are just for reference, you need to find yours. You can adjust power curve.
Help! Condition cutting for tole SECC. Han’s laser 2 KW
？
Help! Condition cutting for tole SECC. Han’s laser 2KW
？
Thanks clara. Great info.
I little question. Do you have any Video that talks about the power and frequency curve?
It is in the CypCut video
Hi Clara! Tks for sharing your knowledge!!! I'm in doubt regardin SS adjustments. Once we know, SS using negative focus to cutting, when you say " Focus to High" or "Focus to low", you means:
" Focus too positive" and "Focus too negative"? Am I right? Tks again Master Clara!!!
Yes, sorry if my explanation is not quite clear.
Hi Ms Clara. Am I right on my comment?
@@LucianoRSilva-ik2rk I think you are right.
Miss clara our machine cutting on ss normally but when it come on HR sheet it disappear laser in the middle why plz guide me
Please show me a video.
What is the readon why on stainless steel the láser cut produces a Brown color on the botom of th cut?
Could you find answer from this video?
Hi Clara!!
Are galvanized steel parameters similar to stainless steel? Are some differences?
Similar, but different.
@@ClaraChai which ones are the different ones?
miss Clara ,currently i am trying to cut stainless 8mm,we have 4 Kw power source, the top is cut nicely,the side allsso at 1.4m/minute, but in the bottom we get a lot of slack, i am with focus at 5.5 and height of cut at 0.4 please advice me for better result thank you
focus is -5.5 off course
but frequency is 5000 and you recomend 4000, is it that much difference?thank you for advice
what kind slags?
Corten steel cutting settings similar to stainless steel?
What is corten?
hello friend.. your videos are very interesting. Do you know what are the laser cutting parameters for stainless steel with plastic film? I appreciate your comments, thank you.
Sorry, no
You sould use film cleaning before cutting. Like engraving.
❤😊
For brass which gas will use
As stainless steel
How to set pressure bar in cypcut
You can check my videos of CypCut Tutorials
Hello
Can share pdf with images
Sorry, no
🙏💐👍
But cutting is good
My nozzle is getting heat
Check whether your laser beam is in center.
Your laser beam center is out