hole size in relation to sheet thickness

[Sp4rk0]

good morning to all, I am early and I am 38 years old, first I worked in the automation industry, now I changed work and moved to heavy carpentry, but I have little knowledge regarding laser cutting or plasma cutting.

I explain to you the question specifically, I have a plate 300x350 sp.30, and it has holes from ø22, asking here at work they told me that for that thickness the plates cut them to the plasma, and the holes then make them to machine because the plasma cannot make holes of that size.

I wanted to understand one thing, regarding the cutting of sheet with holes, there is a general rule to calculate the diameter of holes that you can make on a plate, according to the thickness of the same?

Moreover, until the thickness of the sheet is cut with the laser, and from which thickness is cut to the plasma?

I hope I explained, thank you in advance

 

[Chris_BRB]

Hi.
usually plates of that thickness are cut more to obsicut than with plasma cutting... "theoretically" you can also laser cut a 20mm sheet but suffers a lot and the edge quality is poor.. .
usually to get good cylindrical holes would be better to stand on a hole length of 4/5 times the tip diameter... Then it always depends what you have to do.. there are rigid and precise working centers that with cannon tips make you holes even of 3mm on a length of 200 mm... is always a little related to the economy and functionality that the piece will have...

 

[MassiVonWeizen]

https://www.amada.it/news/126-laser-e-plasma-complementari-più-che-rivali-febbraio-2014.htmlwaiting for more precise answers I attach this explanation to you
with regard to holes, the laser can make small holes on large thicknesses (where I am able to make ø4 on thickness 20 steel) while the plasma tends not to fall below the diameter equal to the thickness for precision issues.

 

[New Rider]

good morning to all, I am early and I am 38 years old, first I worked in the automation industry, now I changed work and moved to heavy carpentry, but I have little knowledge regarding laser cutting or plasma cutting.

I explain to you the question specifically, I have a plate 300x350 sp.30, and it has holes from ø22, asking here at work they told me that for that thickness the plates cut them to the plasma, and the holes then make them to machine because the plasma cannot make holes of that size.

I wanted to understand one thing, regarding the cutting of sheet with holes, there is a general rule to calculate the diameter of holes that you can make on a plate, according to the thickness of the same?

Moreover, until the thickness of the sheet is cut with the laser, and from which thickness is cut to the plasma?

I hope I explained, thank you in advance

Hi.

to make holes on sheet metal you have no big problems everything depends on the resolution of the machine. 2-tenth tolerances on drilling are also obtained.
in plasma instead an empirical rule is that the diameter of the hole must be higher than the thickness of the sheet.

As for the thickness you can cut with laser... depends on what laser you use (fiber, co2etc.) , from what kind of material cuts and powers in play
Empirically consider that a fe360 is cut up to 15/20mm and an aisi up to 8/10mm.

Hi.

 

[Chris_BRB]

https://www.esab.it/it/it/education/blog/what-is-the-best-way-to-cut-steel-plate.cfm I checked on the net now and found this that looks pretty good, will clear you all doubt

 

[MassiVonWeizen]

thanks eros1992

 

[Sp4rk0]

Thank you very much, you were very exhaustive!