Thats nice work!
Back in the 70's & 80's we had to do a lot of hand burning with O/A torches. Unless you liked grinding a lot you quickly learn the tricks and techniques to make a smooth, clean cut. A few of my co-workers and I could make parts more accurately than the CNC burning tables we had at that time but not nearly as quick. I remember new employees, some recently graduates of welding schools, were amazed by what we were able to do as far as accuracy and the cleanness of the edge. Most of them didn't even know how to set the regulators or adjust their torch! I still have my collection of torch tips and use them in my shop on occasion though I usually use my plasma now a days. After 42 yrs working there, I was working in sales when I retired and the shop foreman told me that he didn't have anyone left in the shop that could actually burn out a part from a piece of plate or sheet! That's sad! When the burn table goes down, everything comes to a halt. They can't get by for a few days by having anyone make parts by hand while the burning machine is repaired!
Anything over about 1 1/4" can be tuff by hand and takes a bit of time so on anything heavier we just used a track burner in combination and a circle cutter attachment if there was a curve on the part. The heaviest plate I remember cutting by hand was 3" thk. and I was glad I only had to make 2 cuts.
As far as the heat affect zone, yes, a torch will always have that issue.
Back in the 70's & 80's we had to do a lot of hand burning with O/A torches. Unless you liked grinding a lot you quickly learn the tricks and techniques to make a smooth, clean cut. A few of my co-workers and I could make parts more accurately than the CNC burning tables we had at that time but not nearly as quick. I remember new employees, some recently graduates of welding schools, were amazed by what we were able to do as far as accuracy and the cleanness of the edge. Most of them didn't even know how to set the regulators or adjust their torch! I still have my collection of torch tips and use them in my shop on occasion though I usually use my plasma now a days. After 42 yrs working there, I was working in sales when I retired and the shop foreman told me that he didn't have anyone left in the shop that could actually burn out a part from a piece of plate or sheet! That's sad! When the burn table goes down, everything comes to a halt. They can't get by for a few days by having anyone make parts by hand while the burning machine is repaired!
Anything over about 1 1/4" can be tuff by hand and takes a bit of time so on anything heavier we just used a track burner in combination and a circle cutter attachment if there was a curve on the part. The heaviest plate I remember cutting by hand was 3" thk. and I was glad I only had to make 2 cuts.
As far as the heat affect zone, yes, a torch will always have that issue.
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