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Cutting with O/A Gas or plasma

Metal cutting - oxyfuel cutting, plasma cutting, machining, grinding, and other preparatory work.

Cutting with O/A Gas or plasma

Postby scotty17 » Wed Sep 20, 2017 7:15 pm

Hi Folks,
When cutting with heat from Oxy Acetylene or plasma, why do some of the cuts melt back together? I'm sure it's a sign that I'm either setting the gas or machine up wrong, or operator failure.
Thanks!
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Re: Cutting with O/A Gas or plasma

Postby weldin mike 27 » Wed Sep 20, 2017 7:31 pm

I asked this very question back when I was younger. It's not actually melting back together, it's the oxide not being jetted away properly from the kerf. It's a matter of proper pressure, tip cleaning.
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Re: Cutting with O/A Gas or plasma

Postby LtBadd » Wed Sep 20, 2017 8:18 pm

Scotty
This pic is from ESAB (Victor) cutting torch guide. Using the correct size tip, having the right gas pressures, and cutting technique will be some joy, this info is in the PDF.

Victor cutting guide.jpg
Victor cutting guide.jpg (55.23 KiB) Viewed 278 times


This can be found HERE PDF file will open see page 7-40
Richard

Insert witty, sarcastic, or philosophical remark here.
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Re: Cutting with O/A Gas or plasma

Postby scotty17 » Wed Sep 20, 2017 11:08 pm

Thank you for your help! I really appreciate it. I downloaded that PDF file to keep forever.
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